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 19907e64db15SJan Höppner if (dasd_eckd_is_ese(device)) 19917e64db15SJan Höppner dasd_set_feature(device->cdev, DASD_FEATURE_DISCARD, 1); 19927e64db15SJan Höppner 1993fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 199433b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 19951da177e4SLinus Torvalds private->rdc_data.dev_type, 19961da177e4SLinus Torvalds private->rdc_data.dev_model, 19971da177e4SLinus Torvalds private->rdc_data.cu_type, 19981da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1999b44b0ab3SStefan Weinhuber private->real_cyl, 20001da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 200133b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 200233b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 20038e09f215SStefan Weinhuber return 0; 20048e09f215SStefan Weinhuber 20058e09f215SStefan Weinhuber out_err3: 20068e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 20078e09f215SStefan Weinhuber out_err2: 20088e09f215SStefan Weinhuber dasd_free_block(device->block); 20098e09f215SStefan Weinhuber device->block = NULL; 20108e09f215SStefan Weinhuber out_err1: 20114abb08c2SStefan Weinhuber kfree(private->conf_data); 20128e09f215SStefan Weinhuber kfree(device->private); 20138e09f215SStefan Weinhuber device->private = NULL; 20143d052595SHorst Hummel return rc; 20151da177e4SLinus Torvalds } 20161da177e4SLinus Torvalds 20178e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 20188e09f215SStefan Weinhuber { 2019543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 2020b179b037SStefan Haberland int i; 20214abb08c2SStefan Weinhuber 20227c6553d4SStefan Haberland if (!private) 20237c6553d4SStefan Haberland return; 20247c6553d4SStefan Haberland 20258e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 20264abb08c2SStefan Weinhuber private->ned = NULL; 20274abb08c2SStefan Weinhuber private->sneq = NULL; 20284abb08c2SStefan Weinhuber private->vdsneq = NULL; 20294abb08c2SStefan Weinhuber private->gneq = NULL; 20304abb08c2SStefan Weinhuber private->conf_len = 0; 2031b179b037SStefan Haberland for (i = 0; i < 8; i++) { 2032c9346151SStefan Haberland kfree(device->path[i].conf_data); 2033c9346151SStefan Haberland if ((__u8 *)device->path[i].conf_data == 2034b179b037SStefan Haberland private->conf_data) { 2035b179b037SStefan Haberland private->conf_data = NULL; 2036b179b037SStefan Haberland private->conf_len = 0; 2037b179b037SStefan Haberland } 2038c9346151SStefan Haberland device->path[i].conf_data = NULL; 2039a521b048SStefan Haberland device->path[i].cssid = 0; 2040a521b048SStefan Haberland device->path[i].ssid = 0; 2041a521b048SStefan Haberland device->path[i].chpid = 0; 2042b179b037SStefan Haberland } 20434abb08c2SStefan Weinhuber kfree(private->conf_data); 20444abb08c2SStefan Weinhuber private->conf_data = NULL; 20458e09f215SStefan Weinhuber } 20468e09f215SStefan Weinhuber 20471da177e4SLinus Torvalds static struct dasd_ccw_req * 20481da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 20491da177e4SLinus Torvalds { 2050543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 20511da177e4SLinus Torvalds struct eckd_count *count_data; 20521da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 20531da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 20541da177e4SLinus Torvalds struct ccw1 *ccw; 20551da177e4SLinus Torvalds int cplength, datasize; 20561da177e4SLinus Torvalds int i; 20571da177e4SLinus Torvalds 20581da177e4SLinus Torvalds cplength = 8; 20591da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2060c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2061c5205f2fSSebastian Ott NULL); 20621da177e4SLinus Torvalds if (IS_ERR(cqr)) 20631da177e4SLinus Torvalds return cqr; 20641da177e4SLinus Torvalds ccw = cqr->cpaddr; 2065ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2066ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 206745f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 20681da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 20691da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 20701da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 20711da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 20721da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 20731da177e4SLinus Torvalds 20741da177e4SLinus Torvalds count_data = private->count_area; 20751da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 20761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 20771da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 20781da177e4SLinus Torvalds ccw->flags = 0; 20791da177e4SLinus Torvalds ccw->count = 8; 20801da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 20811da177e4SLinus Torvalds ccw++; 20821da177e4SLinus Torvalds count_data++; 20831da177e4SLinus Torvalds } 20841da177e4SLinus Torvalds 2085ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 20861da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2087ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 20881da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 20891da177e4SLinus Torvalds /* Read count ccw. */ 20901da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 20911da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 20921da177e4SLinus Torvalds ccw->flags = 0; 20931da177e4SLinus Torvalds ccw->count = 8; 20941da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 20951da177e4SLinus Torvalds 20968e09f215SStefan Weinhuber cqr->block = NULL; 20978e09f215SStefan Weinhuber cqr->startdev = device; 20988e09f215SStefan Weinhuber cqr->memdev = device; 2099eb6e199bSStefan Weinhuber cqr->retries = 255; 21001aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 21011da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 21021da177e4SLinus Torvalds return cqr; 21031da177e4SLinus Torvalds } 21041da177e4SLinus Torvalds 2105eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2106eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2107eb6e199bSStefan Weinhuber { 2108eb6e199bSStefan Weinhuber char *sense; 2109eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2110eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2111eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2112eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2113eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2114eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2115eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2116eb6e199bSStefan Weinhuber else 2117eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2118eb6e199bSStefan Weinhuber } else 2119eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2120eb6e199bSStefan Weinhuber } 2121eb6e199bSStefan Weinhuber 21221da177e4SLinus Torvalds /* 21231da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 21241da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 21251da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 21261da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 21271da177e4SLinus Torvalds * for deletion in the meantime). 21281da177e4SLinus Torvalds */ 2129eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2130eb6e199bSStefan Weinhuber void *data) 21311da177e4SLinus Torvalds { 2132543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2133543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21341da177e4SLinus Torvalds 2135eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 21361da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 21371da177e4SLinus Torvalds dasd_kick_device(device); 21381da177e4SLinus Torvalds } 21391da177e4SLinus Torvalds 2140eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 21411da177e4SLinus Torvalds { 21421da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 21431da177e4SLinus Torvalds 21448e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 21451da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 21461da177e4SLinus Torvalds return PTR_ERR(init_cqr); 21471da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 21481da177e4SLinus Torvalds init_cqr->callback_data = NULL; 21491da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2150eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2151eb6e199bSStefan Weinhuber * devices as special case 2152eb6e199bSStefan Weinhuber */ 2153eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2154eb6e199bSStefan Weinhuber init_cqr->retries = 0; 21551da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 21561da177e4SLinus Torvalds return -EAGAIN; 21571da177e4SLinus Torvalds } 21581da177e4SLinus Torvalds 2159eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 21601da177e4SLinus Torvalds { 2161543691a4SSebastian Ott struct dasd_device *device = block->base; 2162543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21631da177e4SLinus Torvalds struct eckd_count *count_area; 21641da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 21651da177e4SLinus Torvalds int status, i; 2166eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 21671da177e4SLinus Torvalds 21681da177e4SLinus Torvalds status = private->init_cqr_status; 21691da177e4SLinus Torvalds private->init_cqr_status = -1; 2170eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2171eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2172eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2173eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2174eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2175eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2176eb6e199bSStefan Weinhuber } 2177eb6e199bSStefan Weinhuber 2178e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2179e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2180e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2181e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2182e4dbb0f2SStefan Haberland goto raw; 2183e4dbb0f2SStefan Haberland } 2184e4dbb0f2SStefan Haberland 2185eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2186eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 21871da177e4SLinus Torvalds return -EMEDIUMTYPE; 2188eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2189eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2190eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2191eb6e199bSStefan Weinhuber "of an I/O error\n"); 2192eb6e199bSStefan Weinhuber return -EIO; 21931da177e4SLinus Torvalds } 21941da177e4SLinus Torvalds 21951da177e4SLinus Torvalds private->uses_cdl = 1; 21961da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 21971da177e4SLinus Torvalds count_area = NULL; 21981da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 21991da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 22003bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 22013bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 22023bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22033bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 22041da177e4SLinus Torvalds private->uses_cdl = 0; 22051da177e4SLinus Torvalds break; 22061da177e4SLinus Torvalds } 22071da177e4SLinus Torvalds } 22081da177e4SLinus Torvalds if (i == 3) 2209ce6915f5SJan Höppner count_area = &private->count_area[3]; 22101da177e4SLinus Torvalds 22111da177e4SLinus Torvalds if (private->uses_cdl == 0) { 22121da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 22131da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 22141da177e4SLinus Torvalds (private->count_area[i].dl != 22153bc9fef9SStefan Haberland private->count_area[0].dl) || 22163bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 22173bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22183bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 22191da177e4SLinus Torvalds break; 22201da177e4SLinus Torvalds } 22211da177e4SLinus Torvalds if (i == 5) 22221da177e4SLinus Torvalds count_area = &private->count_area[0]; 22231da177e4SLinus Torvalds } else { 22241da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2225fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2226fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 22271da177e4SLinus Torvalds } 2228e4dbb0f2SStefan Haberland 22291da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 22301da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 22311da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 22328e09f215SStefan Weinhuber block->bp_block = count_area->dl; 22331da177e4SLinus Torvalds } 22348e09f215SStefan Weinhuber if (block->bp_block == 0) { 2235fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2236fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 22371da177e4SLinus Torvalds return -EMEDIUMTYPE; 22381da177e4SLinus Torvalds } 22398e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 22408e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 22418e09f215SStefan Weinhuber block->s2b_shift++; 22421da177e4SLinus Torvalds 22438e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2244e4dbb0f2SStefan Haberland 2245e4dbb0f2SStefan Haberland raw: 22462cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 22471da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 22481da177e4SLinus Torvalds blk_per_trk); 22491da177e4SLinus Torvalds 2250fc19f381SStefan Haberland dev_info(&device->cdev->dev, 22512cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2252fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 22532cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 22541da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 22558e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 22568e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 22571da177e4SLinus Torvalds private->uses_cdl ? 22581da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 22591da177e4SLinus Torvalds 22601da177e4SLinus Torvalds return 0; 22611da177e4SLinus Torvalds } 22621da177e4SLinus Torvalds 22638e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 22641da177e4SLinus Torvalds { 2265543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 22661da177e4SLinus Torvalds 22671da177e4SLinus Torvalds if (private->init_cqr_status < 0) 22688e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 22691da177e4SLinus Torvalds else 22708e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 22711da177e4SLinus Torvalds } 22721da177e4SLinus Torvalds 2273d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 22748e09f215SStefan Weinhuber { 22758e09f215SStefan Weinhuber return dasd_alias_add_device(device); 22768e09f215SStefan Weinhuber }; 22778e09f215SStefan Weinhuber 22788e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 22798e09f215SStefan Weinhuber { 2280669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2281669f3765SStefan Haberland dasd_put_device(device); 2282669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2283669f3765SStefan Haberland dasd_put_device(device); 2284669f3765SStefan Haberland 2285d42e1712SStefan Haberland return 0; 2286d42e1712SStefan Haberland }; 2287d42e1712SStefan Haberland 2288daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2289d42e1712SStefan Haberland { 22908e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 22918e09f215SStefan Weinhuber }; 22928e09f215SStefan Weinhuber 22931da177e4SLinus Torvalds static int 22948e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 22951da177e4SLinus Torvalds { 2296543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 22971da177e4SLinus Torvalds 22988e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 22991da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 23008e09f215SStefan Weinhuber 0, block->bp_block); 23011da177e4SLinus Torvalds } 23021da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 23031da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 23041da177e4SLinus Torvalds return 0; 23051da177e4SLinus Torvalds } 23061da177e4SLinus Torvalds 23078fd57520SJan Höppner /* 23088fd57520SJan Höppner * Build the TCW request for the format check 23098fd57520SJan Höppner */ 23108fd57520SJan Höppner static struct dasd_ccw_req * 23118fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 23128fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 23138fd57520SJan Höppner int rpt) 23148fd57520SJan Höppner { 23158fd57520SJan Höppner struct dasd_eckd_private *start_priv; 23168fd57520SJan Höppner struct dasd_device *startdev = NULL; 23178fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 23188fd57520SJan Höppner struct dasd_ccw_req *cqr; 23198fd57520SJan Höppner struct itcw *itcw; 23208fd57520SJan Höppner int itcw_size; 23218fd57520SJan Höppner int count; 23228fd57520SJan Höppner int rc; 23238fd57520SJan Höppner int i; 23248fd57520SJan Höppner 23258fd57520SJan Höppner if (enable_pav) 23268fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 23278fd57520SJan Höppner 23288fd57520SJan Höppner if (!startdev) 23298fd57520SJan Höppner startdev = base; 23308fd57520SJan Höppner 23318fd57520SJan Höppner start_priv = startdev->private; 23328fd57520SJan Höppner 23338fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 23348fd57520SJan Höppner 23358fd57520SJan Höppner /* 23368fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 23378fd57520SJan Höppner * calculate the corresponding itcw_size 23388fd57520SJan Höppner */ 23398fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 23408fd57520SJan Höppner 23415e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 23428fd57520SJan Höppner if (IS_ERR(cqr)) 23438fd57520SJan Höppner return cqr; 23448fd57520SJan Höppner 23458fd57520SJan Höppner start_priv->count++; 23468fd57520SJan Höppner 23478fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 23488fd57520SJan Höppner if (IS_ERR(itcw)) { 23498fd57520SJan Höppner rc = -EINVAL; 23508fd57520SJan Höppner goto out_err; 23518fd57520SJan Höppner } 23528fd57520SJan Höppner 23538fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 23548fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 23558fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 23568fd57520SJan Höppner sizeof(struct eckd_count), 23578fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 23588fd57520SJan Höppner if (rc) 23598fd57520SJan Höppner goto out_err; 23608fd57520SJan Höppner 23618fd57520SJan Höppner for (i = 0; i < count; i++) { 23628fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 23638fd57520SJan Höppner sizeof(struct eckd_count)); 23648fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 23658fd57520SJan Höppner rc = -EINVAL; 23668fd57520SJan Höppner goto out_err; 23678fd57520SJan Höppner } 23688fd57520SJan Höppner } 23698fd57520SJan Höppner 23708fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 23718fd57520SJan Höppner itcw_finalize(itcw); 23728fd57520SJan Höppner 23738fd57520SJan Höppner cqr->cpmode = 1; 23748fd57520SJan Höppner cqr->startdev = startdev; 23758fd57520SJan Höppner cqr->memdev = startdev; 23768fd57520SJan Höppner cqr->basedev = base; 23778fd57520SJan Höppner cqr->retries = startdev->default_retries; 23788fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 23798fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 23808fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 23818fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 23828fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 23838fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 23848fd57520SJan Höppner 23858fd57520SJan Höppner return cqr; 23868fd57520SJan Höppner 23878fd57520SJan Höppner out_err: 23888fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 23898fd57520SJan Höppner 23908fd57520SJan Höppner return ERR_PTR(rc); 23918fd57520SJan Höppner } 23928fd57520SJan Höppner 23938fd57520SJan Höppner /* 23948fd57520SJan Höppner * Build the CCW request for the format check 23958fd57520SJan Höppner */ 23968fd57520SJan Höppner static struct dasd_ccw_req * 23978fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 23988fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 23998fd57520SJan Höppner { 24008fd57520SJan Höppner struct dasd_eckd_private *start_priv; 24018fd57520SJan Höppner struct dasd_eckd_private *base_priv; 24028fd57520SJan Höppner struct dasd_device *startdev = NULL; 24038fd57520SJan Höppner struct dasd_ccw_req *cqr; 24048fd57520SJan Höppner struct ccw1 *ccw; 24058fd57520SJan Höppner void *data; 24068fd57520SJan Höppner int cplength, datasize; 24078fd57520SJan Höppner int use_prefix; 24088fd57520SJan Höppner int count; 24098fd57520SJan Höppner int i; 24108fd57520SJan Höppner 24118fd57520SJan Höppner if (enable_pav) 24128fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 24138fd57520SJan Höppner 24148fd57520SJan Höppner if (!startdev) 24158fd57520SJan Höppner startdev = base; 24168fd57520SJan Höppner 24178fd57520SJan Höppner start_priv = startdev->private; 24188fd57520SJan Höppner base_priv = base->private; 24198fd57520SJan Höppner 24208fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24218fd57520SJan Höppner 24228fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 24238fd57520SJan Höppner 24248fd57520SJan Höppner if (use_prefix) { 24258fd57520SJan Höppner cplength = 1; 24268fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 24278fd57520SJan Höppner } else { 24288fd57520SJan Höppner cplength = 2; 24298fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 24308fd57520SJan Höppner sizeof(struct LO_eckd_data); 24318fd57520SJan Höppner } 24328fd57520SJan Höppner cplength += count; 24338fd57520SJan Höppner 24345e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 24358fd57520SJan Höppner if (IS_ERR(cqr)) 24368fd57520SJan Höppner return cqr; 24378fd57520SJan Höppner 24388fd57520SJan Höppner start_priv->count++; 24398fd57520SJan Höppner data = cqr->data; 24408fd57520SJan Höppner ccw = cqr->cpaddr; 24418fd57520SJan Höppner 24428fd57520SJan Höppner if (use_prefix) { 24438fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 24448fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 24458fd57520SJan Höppner count, 0, 0); 24468fd57520SJan Höppner } else { 24478fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 244845f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 24498fd57520SJan Höppner 24508fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 24518fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 24528fd57520SJan Höppner 24538fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 24548fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 24558fd57520SJan Höppner } 24568fd57520SJan Höppner 24578fd57520SJan Höppner for (i = 0; i < count; i++) { 24588fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 24598fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 24608fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 24618fd57520SJan Höppner ccw->count = 8; 24628fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 24638fd57520SJan Höppner ccw++; 24648fd57520SJan Höppner fmt_buffer++; 24658fd57520SJan Höppner } 24668fd57520SJan Höppner 24678fd57520SJan Höppner cqr->startdev = startdev; 24688fd57520SJan Höppner cqr->memdev = startdev; 24698fd57520SJan Höppner cqr->basedev = base; 24708fd57520SJan Höppner cqr->retries = DASD_RETRIES; 24718fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 24728fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 24738fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 24748fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 24758fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 24768fd57520SJan Höppner 24778fd57520SJan Höppner return cqr; 24788fd57520SJan Höppner } 24798fd57520SJan Höppner 24801da177e4SLinus Torvalds static struct dasd_ccw_req * 24815e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 24825e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 24831da177e4SLinus Torvalds { 2484d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2485d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 24861da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 24871da177e4SLinus Torvalds struct eckd_count *ect; 2488d42e1712SStefan Haberland struct ch_t address; 24891da177e4SLinus Torvalds struct ccw1 *ccw; 24901da177e4SLinus Torvalds void *data; 2491b44b0ab3SStefan Weinhuber int rpt; 24921da177e4SLinus Torvalds int cplength, datasize; 2493d42e1712SStefan Haberland int i, j; 2494f9a28f7bSJean-Baptiste Joret int intensity = 0; 2495f9a28f7bSJean-Baptiste Joret int r0_perm; 2496d42e1712SStefan Haberland int nr_tracks; 249718d6624eSStefan Haberland int use_prefix; 24981da177e4SLinus Torvalds 2499a94fa154SStefan Haberland if (enable_pav) 2500d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 250129b8dd9dSStefan Haberland 2502d42e1712SStefan Haberland if (!startdev) 2503d42e1712SStefan Haberland startdev = base; 25041da177e4SLinus Torvalds 2505543691a4SSebastian Ott start_priv = startdev->private; 2506543691a4SSebastian Ott base_priv = base->private; 2507d42e1712SStefan Haberland 2508d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2509d42e1712SStefan Haberland 2510d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 25111da177e4SLinus Torvalds 25121da177e4SLinus Torvalds /* 25131da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 25141da177e4SLinus Torvalds * Bit 0: write record zero 25151da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 25161da177e4SLinus Torvalds * Bit 2: invalidate tracks 25171da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2518f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 25191da177e4SLinus Torvalds * Only some bit combinations do make sense. 25201da177e4SLinus Torvalds */ 2521f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2522f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2523f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2524f9a28f7bSJean-Baptiste Joret } else { 2525f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2526f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2527f9a28f7bSJean-Baptiste Joret } 2528d42e1712SStefan Haberland 252918d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 253018d6624eSStefan Haberland 2531f9a28f7bSJean-Baptiste Joret switch (intensity) { 25321da177e4SLinus Torvalds case 0x00: /* Normal format */ 25331da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2534d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 253518d6624eSStefan Haberland if (use_prefix) 2536d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 25371da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2538d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 253918d6624eSStefan Haberland else 254018d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 254118d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 254218d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 25431da177e4SLinus Torvalds break; 25441da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 25451da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2546d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 254718d6624eSStefan Haberland if (use_prefix) 2548d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 25491da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 25501da177e4SLinus Torvalds sizeof(struct eckd_count) + 2551d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 255218d6624eSStefan Haberland else 255318d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 255418d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 255518d6624eSStefan Haberland sizeof(struct eckd_count) + 255618d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 25571da177e4SLinus Torvalds break; 25581da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 25591da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 25601da177e4SLinus Torvalds cplength = 3; 256118d6624eSStefan Haberland if (use_prefix) 2562d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 25631da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 25641da177e4SLinus Torvalds sizeof(struct eckd_count); 256518d6624eSStefan Haberland else 256618d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 256718d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 256818d6624eSStefan Haberland sizeof(struct eckd_count); 25691da177e4SLinus Torvalds break; 25701da177e4SLinus Torvalds default: 2571d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2572d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2573d42e1712SStefan Haberland fdata->intensity); 25741da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 25751da177e4SLinus Torvalds } 25765e2b17e7SJan Höppner 25775e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 25781da177e4SLinus Torvalds if (IS_ERR(fcp)) 25791da177e4SLinus Torvalds return fcp; 25801da177e4SLinus Torvalds 2581d42e1712SStefan Haberland start_priv->count++; 25821da177e4SLinus Torvalds data = fcp->data; 25831da177e4SLinus Torvalds ccw = fcp->cpaddr; 25841da177e4SLinus Torvalds 2585f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 25861da177e4SLinus Torvalds case 0x00: /* Normal format. */ 258718d6624eSStefan Haberland if (use_prefix) { 2588d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2589d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2590d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2591f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2592f9a28f7bSJean-Baptiste Joret if (r0_perm) 2593d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2594d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2595d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 259618d6624eSStefan Haberland } else { 259718d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 259818d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 259945f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 260018d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 260118d6624eSStefan Haberland if (r0_perm) 260218d6624eSStefan Haberland ((struct DE_eckd_data *) data) 260318d6624eSStefan Haberland ->ga_extended |= 0x04; 260418d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 260518d6624eSStefan Haberland } 26061da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26071da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2608d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2609d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 26101da177e4SLinus Torvalds fdata->blksize); 26111da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26121da177e4SLinus Torvalds break; 26131da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 261418d6624eSStefan Haberland if (use_prefix) { 2615d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2616d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 26171da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2618d42e1712SStefan Haberland base, startdev); 2619d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 262018d6624eSStefan Haberland } else { 262118d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 262218d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 262345f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 262418d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 262518d6624eSStefan Haberland } 26261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26271da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2628d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2629d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2630d42e1712SStefan Haberland base->block->bp_block); 26311da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26321da177e4SLinus Torvalds break; 26331da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 263418d6624eSStefan Haberland if (use_prefix) { 2635d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2636d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2637d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2638d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 263918d6624eSStefan Haberland } else { 264018d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 264118d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 264245f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 264318d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 264418d6624eSStefan Haberland } 26451da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26461da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 26471da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2648d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 26491da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26501da177e4SLinus Torvalds break; 26511da177e4SLinus Torvalds } 2652d42e1712SStefan Haberland 2653d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2654d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2655d42e1712SStefan Haberland set_ch_t(&address, 2656d42e1712SStefan Haberland (fdata->start_unit + j) / 2657d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2658d42e1712SStefan Haberland (fdata->start_unit + j) % 2659d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2660f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 26611da177e4SLinus Torvalds ect = (struct eckd_count *) data; 26621da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2663b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2664b44b0ab3SStefan Weinhuber ect->head = address.head; 26651da177e4SLinus Torvalds ect->record = 0; 26661da177e4SLinus Torvalds ect->kl = 0; 26671da177e4SLinus Torvalds ect->dl = 8; 26681da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26691da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 26701da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 26711da177e4SLinus Torvalds ccw->count = 8; 26721da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 26731da177e4SLinus Torvalds ccw++; 26741da177e4SLinus Torvalds } 2675f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 26761da177e4SLinus Torvalds ect = (struct eckd_count *) data; 26771da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2678b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2679b44b0ab3SStefan Weinhuber ect->head = address.head; 26801da177e4SLinus Torvalds ect->record = 1; 26811da177e4SLinus Torvalds ect->kl = 0; 26821da177e4SLinus Torvalds ect->dl = 0; 26831da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26841da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 26851da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 26861da177e4SLinus Torvalds ccw->count = 8; 26871da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 26881da177e4SLinus Torvalds } else { /* write remaining records */ 26891da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 26901da177e4SLinus Torvalds ect = (struct eckd_count *) data; 26911da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2692b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2693b44b0ab3SStefan Weinhuber ect->head = address.head; 26941da177e4SLinus Torvalds ect->record = i + 1; 26951da177e4SLinus Torvalds ect->kl = 0; 26961da177e4SLinus Torvalds ect->dl = fdata->blksize; 2697d42e1712SStefan Haberland /* 2698d42e1712SStefan Haberland * Check for special tracks 0-1 2699d42e1712SStefan Haberland * when formatting CDL 2700d42e1712SStefan Haberland */ 2701f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 270246d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 27031da177e4SLinus Torvalds if (i < 3) { 27041da177e4SLinus Torvalds ect->kl = 4; 27051da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 27061da177e4SLinus Torvalds } 27071da177e4SLinus Torvalds } 2708f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 270946d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 27101da177e4SLinus Torvalds ect->kl = 44; 27111da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 27121da177e4SLinus Torvalds } 27131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2714d42e1712SStefan Haberland if (i != 0 || j == 0) 2715d42e1712SStefan Haberland ccw->cmd_code = 2716d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2717d42e1712SStefan Haberland else 2718d42e1712SStefan Haberland ccw->cmd_code = 2719d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 27201da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27211da177e4SLinus Torvalds ccw->count = 8; 27221da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27231da177e4SLinus Torvalds ccw++; 27241da177e4SLinus Torvalds } 27251da177e4SLinus Torvalds } 2726d42e1712SStefan Haberland } 2727d42e1712SStefan Haberland 2728d42e1712SStefan Haberland fcp->startdev = startdev; 2729d42e1712SStefan Haberland fcp->memdev = startdev; 273029b8dd9dSStefan Haberland fcp->basedev = base; 2731eb6e199bSStefan Weinhuber fcp->retries = 256; 2732d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 27331aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 27341da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2735d42e1712SStefan Haberland 27361da177e4SLinus Torvalds return fcp; 27371da177e4SLinus Torvalds } 27381da177e4SLinus Torvalds 2739570d237cSJan Höppner /* 2740570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2741570d237cSJan Höppner */ 2742570d237cSJan Höppner static struct dasd_ccw_req * 2743570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 27448fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 27458fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2746d42e1712SStefan Haberland { 27478fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 27488fd57520SJan Höppner 27498fd57520SJan Höppner if (!fmt_buffer) { 27505e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 27518fd57520SJan Höppner } else { 27528fd57520SJan Höppner if (tpm) 27538fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 27548fd57520SJan Höppner enable_pav, 27558fd57520SJan Höppner fmt_buffer, rpt); 27568fd57520SJan Höppner else 27578fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 27588fd57520SJan Höppner fmt_buffer, rpt); 27598fd57520SJan Höppner } 27608fd57520SJan Höppner 27618fd57520SJan Höppner return ccw_req; 2762570d237cSJan Höppner } 2763570d237cSJan Höppner 2764570d237cSJan Höppner /* 2765570d237cSJan Höppner * Sanity checks on format_data 2766570d237cSJan Höppner */ 2767570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2768570d237cSJan Höppner struct format_data_t *fdata) 2769570d237cSJan Höppner { 2770543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2771d42e1712SStefan Haberland 2772d42e1712SStefan Haberland if (fdata->start_unit >= 2773d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2774d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2775d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2776d42e1712SStefan Haberland fdata->start_unit); 2777d42e1712SStefan Haberland return -EINVAL; 2778d42e1712SStefan Haberland } 2779d42e1712SStefan Haberland if (fdata->stop_unit >= 2780d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2781d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2782d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2783d42e1712SStefan Haberland fdata->stop_unit); 2784d42e1712SStefan Haberland return -EINVAL; 2785d42e1712SStefan Haberland } 2786d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2787d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2788d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2789d42e1712SStefan Haberland fdata->start_unit); 2790d42e1712SStefan Haberland return -EINVAL; 2791d42e1712SStefan Haberland } 2792d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2793d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2794d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2795d42e1712SStefan Haberland fdata->blksize); 2796d42e1712SStefan Haberland return -EINVAL; 2797d42e1712SStefan Haberland } 2798570d237cSJan Höppner return 0; 2799570d237cSJan Höppner } 2800570d237cSJan Höppner 2801570d237cSJan Höppner /* 2802570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2803570d237cSJan Höppner */ 2804570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2805570d237cSJan Höppner struct format_data_t *fdata, 28068fd57520SJan Höppner int enable_pav, int tpm, 28078fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 28088fd57520SJan Höppner struct irb *irb) 2809570d237cSJan Höppner { 2810543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2811570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2812570d237cSJan Höppner struct list_head format_queue; 2813570d237cSJan Höppner struct dasd_device *device; 28148fd57520SJan Höppner char *sense = NULL; 2815570d237cSJan Höppner int old_start, old_stop, format_step; 2816570d237cSJan Höppner int step, retry; 2817570d237cSJan Höppner int rc; 2818570d237cSJan Höppner 2819570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2820570d237cSJan Höppner if (rc) 2821570d237cSJan Höppner return rc; 2822d42e1712SStefan Haberland 2823d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2824d42e1712SStefan Haberland 282546d1c03cSJan Höppner old_start = fdata->start_unit; 282629b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2827d42e1712SStefan Haberland 28288fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 28298fd57520SJan Höppner /* Command Mode / Format Check */ 28308fd57520SJan Höppner format_step = 1; 28318fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 28328fd57520SJan Höppner /* Transport Mode / Format Check */ 28338fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 28348fd57520SJan Höppner } else { 28358fd57520SJan Höppner /* Normal Formatting */ 28368fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 28378fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 28388fd57520SJan Höppner } 28398fd57520SJan Höppner 284046d1c03cSJan Höppner do { 284146d1c03cSJan Höppner retry = 0; 2842d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2843d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 284446d1c03cSJan Höppner if (step > format_step) { 284546d1c03cSJan Höppner fdata->stop_unit = 284646d1c03cSJan Höppner fdata->start_unit + format_step - 1; 284746d1c03cSJan Höppner } 2848d42e1712SStefan Haberland 2849570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 28508fd57520SJan Höppner enable_pav, tpm, 28518fd57520SJan Höppner fmt_buffer, rpt); 2852d42e1712SStefan Haberland if (IS_ERR(cqr)) { 285346d1c03cSJan Höppner rc = PTR_ERR(cqr); 285446d1c03cSJan Höppner if (rc == -ENOMEM) { 285546d1c03cSJan Höppner if (list_empty(&format_queue)) 285646d1c03cSJan Höppner goto out; 2857d42e1712SStefan Haberland /* 285846d1c03cSJan Höppner * not enough memory available, start 285946d1c03cSJan Höppner * requests retry after first requests 286046d1c03cSJan Höppner * were finished 2861d42e1712SStefan Haberland */ 286246d1c03cSJan Höppner retry = 1; 286346d1c03cSJan Höppner break; 2864d42e1712SStefan Haberland } 286546d1c03cSJan Höppner goto out_err; 286646d1c03cSJan Höppner } 286746d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2868d42e1712SStefan Haberland 28698fd57520SJan Höppner if (fmt_buffer) { 28708fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 28718fd57520SJan Höppner fmt_buffer += rpt * step; 28728fd57520SJan Höppner } 2873d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2874d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2875d42e1712SStefan Haberland } 2876d42e1712SStefan Haberland 287746d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2878d42e1712SStefan Haberland 287946d1c03cSJan Höppner out_err: 2880d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2881d42e1712SStefan Haberland device = cqr->startdev; 2882543691a4SSebastian Ott private = device->private; 28838fd57520SJan Höppner 28848fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 28858fd57520SJan Höppner /* 28868fd57520SJan Höppner * Only get sense data if called by format 28878fd57520SJan Höppner * check 28888fd57520SJan Höppner */ 28898fd57520SJan Höppner if (fmt_buffer && irb) { 28908fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 28918fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 28928fd57520SJan Höppner } 2893d42e1712SStefan Haberland rc = -EIO; 28948fd57520SJan Höppner } 2895d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 28965e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 2897d42e1712SStefan Haberland private->count--; 2898d42e1712SStefan Haberland } 2899d42e1712SStefan Haberland 29008fd57520SJan Höppner if (rc && rc != -EIO) 290146d1c03cSJan Höppner goto out; 29028fd57520SJan Höppner if (rc == -EIO) { 29038fd57520SJan Höppner /* 29048fd57520SJan Höppner * In case fewer than the expected records are on the 29058fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 29068fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 29078fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 29088fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 29098fd57520SJan Höppner * and continue. 29108fd57520SJan Höppner */ 29118fd57520SJan Höppner if (sense && 29128fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 29138fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 29148fd57520SJan Höppner retry = 1; 29158fd57520SJan Höppner else 29168fd57520SJan Höppner goto out; 29178fd57520SJan Höppner } 291829b8dd9dSStefan Haberland 291946d1c03cSJan Höppner } while (retry); 292046d1c03cSJan Höppner 292146d1c03cSJan Höppner out: 292246d1c03cSJan Höppner fdata->start_unit = old_start; 292346d1c03cSJan Höppner fdata->stop_unit = old_stop; 2924d42e1712SStefan Haberland 2925d42e1712SStefan Haberland return rc; 2926d42e1712SStefan Haberland } 2927d42e1712SStefan Haberland 2928570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2929570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2930570d237cSJan Höppner { 29318fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 29328fd57520SJan Höppner 0, NULL); 29338fd57520SJan Höppner } 29348fd57520SJan Höppner 29358fd57520SJan Höppner /* 29365e2b17e7SJan Höppner * Callback function to free ESE format requests. 29375e2b17e7SJan Höppner */ 29385e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 29395e2b17e7SJan Höppner { 29405e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 29415e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 29425e2b17e7SJan Höppner 29435e2b17e7SJan Höppner private->count--; 29445e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 29455e2b17e7SJan Höppner } 29465e2b17e7SJan Höppner 29475e2b17e7SJan Höppner static struct dasd_ccw_req * 29485e2b17e7SJan Höppner dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr) 29495e2b17e7SJan Höppner { 29505e2b17e7SJan Höppner struct dasd_eckd_private *private; 29515e2b17e7SJan Höppner struct format_data_t fdata; 29525e2b17e7SJan Höppner unsigned int recs_per_trk; 29535e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 29545e2b17e7SJan Höppner struct dasd_device *base; 29555e2b17e7SJan Höppner struct dasd_block *block; 29565e2b17e7SJan Höppner unsigned int blksize; 29575e2b17e7SJan Höppner struct request *req; 29585e2b17e7SJan Höppner sector_t first_trk; 29595e2b17e7SJan Höppner sector_t last_trk; 29605e2b17e7SJan Höppner int rc; 29615e2b17e7SJan Höppner 29625e2b17e7SJan Höppner req = cqr->callback_data; 29635e2b17e7SJan Höppner base = cqr->block->base; 29645e2b17e7SJan Höppner private = base->private; 29655e2b17e7SJan Höppner block = base->block; 29665e2b17e7SJan Höppner blksize = block->bp_block; 29675e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 29685e2b17e7SJan Höppner 29695e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 29705e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 29715e2b17e7SJan Höppner last_trk = 29725e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 29735e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 29745e2b17e7SJan Höppner 29755e2b17e7SJan Höppner fdata.start_unit = first_trk; 29765e2b17e7SJan Höppner fdata.stop_unit = last_trk; 29775e2b17e7SJan Höppner fdata.blksize = blksize; 29785e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 29795e2b17e7SJan Höppner 29805e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 29815e2b17e7SJan Höppner if (rc) 29825e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 29835e2b17e7SJan Höppner 29845e2b17e7SJan Höppner /* 29855e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 29865e2b17e7SJan Höppner * the former startdev. 29875e2b17e7SJan Höppner */ 29885e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 29895e2b17e7SJan Höppner if (IS_ERR(fcqr)) 29905e2b17e7SJan Höppner return fcqr; 29915e2b17e7SJan Höppner 29925e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 29935e2b17e7SJan Höppner 29945e2b17e7SJan Höppner return fcqr; 29955e2b17e7SJan Höppner } 29965e2b17e7SJan Höppner 29975e2b17e7SJan Höppner /* 29985e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 29995e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 30005e2b17e7SJan Höppner */ 30015e2b17e7SJan Höppner static void dasd_eckd_ese_read(struct dasd_ccw_req *cqr) 30025e2b17e7SJan Höppner { 30035e2b17e7SJan Höppner unsigned int blksize, off; 30045e2b17e7SJan Höppner struct dasd_device *base; 30055e2b17e7SJan Höppner struct req_iterator iter; 30065e2b17e7SJan Höppner struct request *req; 30075e2b17e7SJan Höppner struct bio_vec bv; 30085e2b17e7SJan Höppner char *dst; 30095e2b17e7SJan Höppner 30105e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 30115e2b17e7SJan Höppner base = cqr->block->base; 30125e2b17e7SJan Höppner blksize = base->block->bp_block; 30135e2b17e7SJan Höppner 30145e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 30155e2b17e7SJan Höppner dst = page_address(bv.bv_page) + bv.bv_offset; 30165e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 30175e2b17e7SJan Höppner if (dst && rq_data_dir(req) == READ) { 30185e2b17e7SJan Höppner dst += off; 30195e2b17e7SJan Höppner memset(dst, 0, blksize); 30205e2b17e7SJan Höppner } 30215e2b17e7SJan Höppner } 30225e2b17e7SJan Höppner } 30235e2b17e7SJan Höppner } 30245e2b17e7SJan Höppner 30255e2b17e7SJan Höppner /* 30268fd57520SJan Höppner * Helper function to count consecutive records of a single track. 30278fd57520SJan Höppner */ 30288fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 30298fd57520SJan Höppner int max) 30308fd57520SJan Höppner { 30318fd57520SJan Höppner int head; 30328fd57520SJan Höppner int i; 30338fd57520SJan Höppner 30348fd57520SJan Höppner head = fmt_buffer[start].head; 30358fd57520SJan Höppner 30368fd57520SJan Höppner /* 30378fd57520SJan Höppner * There are 3 conditions where we stop counting: 30388fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 30398fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 30408fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 30418fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 30428fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 30438fd57520SJan Höppner * record will be 0 then) 30448fd57520SJan Höppner */ 30458fd57520SJan Höppner for (i = start; i < max; i++) { 30468fd57520SJan Höppner if (i > start) { 30478fd57520SJan Höppner if ((fmt_buffer[i].head == head && 30488fd57520SJan Höppner fmt_buffer[i].record == 1) || 30498fd57520SJan Höppner fmt_buffer[i].head != head || 30508fd57520SJan Höppner fmt_buffer[i].record == 0) 30518fd57520SJan Höppner break; 30528fd57520SJan Höppner } 30538fd57520SJan Höppner } 30548fd57520SJan Höppner 30558fd57520SJan Höppner return i - start; 30568fd57520SJan Höppner } 30578fd57520SJan Höppner 30588fd57520SJan Höppner /* 30598fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 30608fd57520SJan Höppner * record ids, and key length are compared with expected data. 30618fd57520SJan Höppner * 30628fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 30638fd57520SJan Höppner * additional information, depending on the error. 30648fd57520SJan Höppner */ 30658fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 30668fd57520SJan Höppner struct format_check_t *cdata, 30678fd57520SJan Höppner int rpt_max, int rpt_exp, 30688fd57520SJan Höppner int trk_per_cyl, int tpm) 30698fd57520SJan Höppner { 30708fd57520SJan Höppner struct ch_t geo; 30718fd57520SJan Höppner int max_entries; 30728fd57520SJan Höppner int count = 0; 30738fd57520SJan Höppner int trkcount; 30748fd57520SJan Höppner int blksize; 30758fd57520SJan Höppner int pos = 0; 30768fd57520SJan Höppner int i, j; 30778fd57520SJan Höppner int kl; 30788fd57520SJan Höppner 30798fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 30808fd57520SJan Höppner max_entries = trkcount * rpt_max; 30818fd57520SJan Höppner 30828fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 30838fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 30848fd57520SJan Höppner if (tpm) { 30858fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 30868fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 30878fd57520SJan Höppner if (pos++ > max_entries) 30888fd57520SJan Höppner break; 30898fd57520SJan Höppner } 30908fd57520SJan Höppner } else { 30918fd57520SJan Höppner if (i != cdata->expect.start_unit) 30928fd57520SJan Höppner pos += rpt_max - count; 30938fd57520SJan Höppner } 30948fd57520SJan Höppner 30958fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 30968fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 30978fd57520SJan Höppner 30988fd57520SJan Höppner /* Count and check number of records */ 30998fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 31008fd57520SJan Höppner 31018fd57520SJan Höppner if (count < rpt_exp) { 31028fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 31038fd57520SJan Höppner break; 31048fd57520SJan Höppner } 31058fd57520SJan Höppner if (count > rpt_exp) { 31068fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 31078fd57520SJan Höppner break; 31088fd57520SJan Höppner } 31098fd57520SJan Höppner 31108fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 31118fd57520SJan Höppner blksize = cdata->expect.blksize; 31128fd57520SJan Höppner kl = 0; 31138fd57520SJan Höppner 31148fd57520SJan Höppner /* 31158fd57520SJan Höppner * Set special values when checking CDL formatted 31168fd57520SJan Höppner * devices. 31178fd57520SJan Höppner */ 31188fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 31198fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 31208fd57520SJan Höppner if (j < 3) { 31218fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 31228fd57520SJan Höppner kl = 4; 31238fd57520SJan Höppner } 31248fd57520SJan Höppner } 31258fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 31268fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 31278fd57520SJan Höppner blksize = LABEL_SIZE - 44; 31288fd57520SJan Höppner kl = 44; 31298fd57520SJan Höppner } 31308fd57520SJan Höppner 31318fd57520SJan Höppner /* Check blocksize */ 31328fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 31338fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 31348fd57520SJan Höppner goto out; 31358fd57520SJan Höppner } 31368fd57520SJan Höppner /* Check if key length is 0 */ 31378fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 31388fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 31398fd57520SJan Höppner goto out; 31408fd57520SJan Höppner } 31418fd57520SJan Höppner /* Check if record_id is correct */ 31428fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 31438fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 31448fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 31458fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 31468fd57520SJan Höppner goto out; 31478fd57520SJan Höppner } 31488fd57520SJan Höppner } 31498fd57520SJan Höppner } 31508fd57520SJan Höppner 31518fd57520SJan Höppner out: 31528fd57520SJan Höppner /* 31538fd57520SJan Höppner * In case of no errors, we need to decrease by one 31548fd57520SJan Höppner * to get the correct positions. 31558fd57520SJan Höppner */ 31568fd57520SJan Höppner if (!cdata->result) { 31578fd57520SJan Höppner i--; 31588fd57520SJan Höppner pos--; 31598fd57520SJan Höppner } 31608fd57520SJan Höppner 31618fd57520SJan Höppner cdata->unit = i; 31628fd57520SJan Höppner cdata->num_records = count; 31638fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 31648fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 31658fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 31668fd57520SJan Höppner } 31678fd57520SJan Höppner 31688fd57520SJan Höppner /* 31698fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 31708fd57520SJan Höppner */ 31718fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 31728fd57520SJan Höppner struct format_check_t *cdata, 31738fd57520SJan Höppner int enable_pav) 31748fd57520SJan Höppner { 31758fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 31768fd57520SJan Höppner struct eckd_count *fmt_buffer; 31778fd57520SJan Höppner struct irb irb; 31788fd57520SJan Höppner int rpt_max, rpt_exp; 31798fd57520SJan Höppner int fmt_buffer_size; 31808fd57520SJan Höppner int trk_per_cyl; 31818fd57520SJan Höppner int trkcount; 31828fd57520SJan Höppner int tpm = 0; 31838fd57520SJan Höppner int rc; 31848fd57520SJan Höppner 31858fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 31868fd57520SJan Höppner 31878fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 31888fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 31898fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 31908fd57520SJan Höppner 31918fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 31928fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 31938fd57520SJan Höppner 31948fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 31958fd57520SJan Höppner if (!fmt_buffer) 31968fd57520SJan Höppner return -ENOMEM; 31978fd57520SJan Höppner 31988fd57520SJan Höppner /* 31998fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 32008fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 32018fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 32028fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 32038fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 32048fd57520SJan Höppner * processed using command mode. 32058fd57520SJan Höppner */ 32068fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 32078fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 32088fd57520SJan Höppner tpm = 1; 32098fd57520SJan Höppner 32108fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 32118fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 32128fd57520SJan Höppner if (rc && rc != -EIO) 32138fd57520SJan Höppner goto out; 32148fd57520SJan Höppner if (rc == -EIO) { 32158fd57520SJan Höppner /* 32168fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 32178fd57520SJan Höppner * with an incorrect length error, we're going to retry the 32188fd57520SJan Höppner * check with command mode. 32198fd57520SJan Höppner */ 32208fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 32218fd57520SJan Höppner tpm = 0; 32228fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 32238fd57520SJan Höppner enable_pav, tpm, 32248fd57520SJan Höppner fmt_buffer, rpt_max, 32258fd57520SJan Höppner &irb); 32268fd57520SJan Höppner if (rc) 32278fd57520SJan Höppner goto out; 32288fd57520SJan Höppner } else { 32298fd57520SJan Höppner goto out; 32308fd57520SJan Höppner } 32318fd57520SJan Höppner } 32328fd57520SJan Höppner 32338fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 32348fd57520SJan Höppner trk_per_cyl, tpm); 32358fd57520SJan Höppner 32368fd57520SJan Höppner out: 32378fd57520SJan Höppner kfree(fmt_buffer); 32388fd57520SJan Höppner 32398fd57520SJan Höppner return rc; 3240570d237cSJan Höppner } 3241570d237cSJan Höppner 32428e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 32431da177e4SLinus Torvalds { 3244a2ace466SHannes Reinecke if (cqr->retries < 0) { 3245a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3246a2ace466SHannes Reinecke return; 3247a2ace466SHannes Reinecke } 32488e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 32498e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 32508e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 32518e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3252c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 32531da177e4SLinus Torvalds } 32548e09f215SStefan Weinhuber }; 32551da177e4SLinus Torvalds 32561da177e4SLinus Torvalds static dasd_erp_fn_t 32571da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 32581da177e4SLinus Torvalds { 32598e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 32601da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 32611da177e4SLinus Torvalds 32621da177e4SLinus Torvalds switch (cdev->id.cu_type) { 32631da177e4SLinus Torvalds case 0x3990: 32641da177e4SLinus Torvalds case 0x2105: 32651da177e4SLinus Torvalds case 0x2107: 32661da177e4SLinus Torvalds case 0x1750: 32671da177e4SLinus Torvalds return dasd_3990_erp_action; 32681da177e4SLinus Torvalds case 0x9343: 32691da177e4SLinus Torvalds case 0x3880: 32701da177e4SLinus Torvalds default: 32711da177e4SLinus Torvalds return dasd_default_erp_action; 32721da177e4SLinus Torvalds } 32731da177e4SLinus Torvalds } 32741da177e4SLinus Torvalds 32751da177e4SLinus Torvalds static dasd_erp_fn_t 32761da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 32771da177e4SLinus Torvalds { 32781da177e4SLinus Torvalds return dasd_default_erp_postaction; 32791da177e4SLinus Torvalds } 32801da177e4SLinus Torvalds 32815a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 32825a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 32838e09f215SStefan Weinhuber struct irb *irb) 32848e09f215SStefan Weinhuber { 32858e09f215SStefan Weinhuber char mask; 3286f3eb5384SStefan Weinhuber char *sense = NULL; 3287543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 32888e09f215SStefan Weinhuber 32898e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 32908e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3291f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3292c8d1c0ffSStefan Haberland /* 3293c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3294c8d1c0ffSStefan Haberland * and only if not suspended 3295c8d1c0ffSStefan Haberland */ 3296501183f2SStefan Haberland if (!device->block && private->lcu && 329725e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3298c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3299c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3300501183f2SStefan Haberland /* schedule worker to reload device */ 3301501183f2SStefan Haberland dasd_reload_device(device); 3302501183f2SStefan Haberland } 33038e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 33048e09f215SStefan Weinhuber return; 33058e09f215SStefan Weinhuber } 33068e09f215SStefan Weinhuber 3307a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 33085a27e60dSStefan Weinhuber if (!sense) 33095a27e60dSStefan Weinhuber return; 33105a27e60dSStefan Weinhuber 33115a27e60dSStefan Weinhuber /* summary unit check */ 3312c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3313a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 331459a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 331559a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 331659a9ed5fSStefan Haberland "eckd suc: device already notified"); 331759a9ed5fSStefan Haberland return; 331859a9ed5fSStefan Haberland } 331959a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 332059a9ed5fSStefan Haberland if (!sense) { 332159a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 332259a9ed5fSStefan Haberland "eckd suc: no reason code available"); 332359a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 332459a9ed5fSStefan Haberland return; 332559a9ed5fSStefan Haberland 332659a9ed5fSStefan Haberland } 332759a9ed5fSStefan Haberland private->suc_reason = sense[8]; 332859a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 332959a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 333059a9ed5fSStefan Haberland private->suc_reason); 333159a9ed5fSStefan Haberland dasd_get_device(device); 333259a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 333359a9ed5fSStefan Haberland dasd_put_device(device); 333459a9ed5fSStefan Haberland 33358e09f215SStefan Weinhuber return; 33368e09f215SStefan Weinhuber } 33378e09f215SStefan Weinhuber 3338f60c768cSStefan Haberland /* service information message SIM */ 33395a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3340f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3341f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3342f60c768cSStefan Haberland return; 3343f60c768cSStefan Haberland } 3344f60c768cSStefan Haberland 33455a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 33465a27e60dSStefan Weinhuber * as alias devices may be used with several bases 33475a27e60dSStefan Weinhuber */ 3348c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3349c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 33505a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 33515a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 33525a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 33535a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 33545a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 33555a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 33565a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3357ada3df91SStefan Haberland } 33585a27e60dSStefan Weinhuber } 3359f3eb5384SStefan Weinhuber 336091dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 336191dc4a19SJan Höppner unsigned int first_trk, 336291dc4a19SJan Höppner unsigned int last_trk) 336391dc4a19SJan Höppner { 336491dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 336591dc4a19SJan Höppner unsigned int trks_per_vol; 336691dc4a19SJan Höppner int rc = 0; 336791dc4a19SJan Höppner 336891dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 336991dc4a19SJan Höppner 337091dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 337191dc4a19SJan Höppner dev_warn(&device->cdev->dev, 337291dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 337391dc4a19SJan Höppner first_trk); 337491dc4a19SJan Höppner rc = -EINVAL; 337591dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 337691dc4a19SJan Höppner dev_warn(&device->cdev->dev, 337791dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 337891dc4a19SJan Höppner last_trk); 337991dc4a19SJan Höppner rc = -EINVAL; 338091dc4a19SJan Höppner } else if (first_trk > last_trk) { 338191dc4a19SJan Höppner dev_warn(&device->cdev->dev, 338291dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 338391dc4a19SJan Höppner first_trk); 338491dc4a19SJan Höppner rc = -EINVAL; 338591dc4a19SJan Höppner } 338691dc4a19SJan Höppner return rc; 338791dc4a19SJan Höppner } 338891dc4a19SJan Höppner 338991dc4a19SJan Höppner /* 339091dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 339191dc4a19SJan Höppner * with extent alignment in mind. 339291dc4a19SJan Höppner */ 339391dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 339491dc4a19SJan Höppner { 339591dc4a19SJan Höppner int cur_pos = 0; 339691dc4a19SJan Höppner int count = 0; 339791dc4a19SJan Höppner int tmp; 339891dc4a19SJan Höppner 339991dc4a19SJan Höppner if (from == to) 340091dc4a19SJan Höppner return 1; 340191dc4a19SJan Höppner 340291dc4a19SJan Höppner /* Count first partial extent */ 340391dc4a19SJan Höppner if (from % trks_per_ext != 0) { 340491dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 340591dc4a19SJan Höppner if (tmp > to) 340691dc4a19SJan Höppner tmp = to; 340791dc4a19SJan Höppner cur_pos = tmp - from + 1; 340891dc4a19SJan Höppner count++; 340991dc4a19SJan Höppner } 341091dc4a19SJan Höppner /* Count full extents */ 341191dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 341291dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 341391dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 341491dc4a19SJan Höppner cur_pos = tmp; 341591dc4a19SJan Höppner } 341691dc4a19SJan Höppner /* Count last partial extent */ 341791dc4a19SJan Höppner if (cur_pos < to) 341891dc4a19SJan Höppner count++; 341991dc4a19SJan Höppner 342091dc4a19SJan Höppner return count; 342191dc4a19SJan Höppner } 342291dc4a19SJan Höppner 342391dc4a19SJan Höppner /* 342491dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 342591dc4a19SJan Höppner */ 342691dc4a19SJan Höppner static struct dasd_ccw_req * 342791dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 342891dc4a19SJan Höppner struct request *req, unsigned int first_trk, 342991dc4a19SJan Höppner unsigned int last_trk, int by_extent) 343091dc4a19SJan Höppner { 343191dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 343291dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 343391dc4a19SJan Höppner struct dasd_rssd_features *features; 343491dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 343591dc4a19SJan Höppner u16 heads, beg_head, end_head; 343691dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 343791dc4a19SJan Höppner struct dasd_ccw_req *cqr; 343891dc4a19SJan Höppner u32 beg_cyl, end_cyl; 343991dc4a19SJan Höppner struct ccw1 *ccw; 344091dc4a19SJan Höppner int trks_per_ext; 344191dc4a19SJan Höppner size_t ras_size; 344291dc4a19SJan Höppner size_t size; 344391dc4a19SJan Höppner int nr_exts; 344491dc4a19SJan Höppner void *rq; 344591dc4a19SJan Höppner int i; 344691dc4a19SJan Höppner 344791dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 344891dc4a19SJan Höppner return ERR_PTR(-EINVAL); 344991dc4a19SJan Höppner 345091dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 345191dc4a19SJan Höppner 345291dc4a19SJan Höppner features = &private->features; 345391dc4a19SJan Höppner 345491dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 345591dc4a19SJan Höppner nr_exts = 0; 345691dc4a19SJan Höppner if (by_extent) 345791dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 345891dc4a19SJan Höppner ras_size = sizeof(*ras_data); 345991dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 346091dc4a19SJan Höppner 346191dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 346291dc4a19SJan Höppner if (IS_ERR(cqr)) { 346391dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 346491dc4a19SJan Höppner "Could not allocate RAS request"); 346591dc4a19SJan Höppner return cqr; 346691dc4a19SJan Höppner } 346791dc4a19SJan Höppner 346891dc4a19SJan Höppner ras_data = cqr->data; 346991dc4a19SJan Höppner memset(ras_data, 0, size); 347091dc4a19SJan Höppner 347191dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 347291dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 347391dc4a19SJan Höppner /* Release specified extents or entire volume */ 347491dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 347591dc4a19SJan Höppner /* 347691dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 347791dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 347891dc4a19SJan Höppner * subset. 347991dc4a19SJan Höppner */ 348091dc4a19SJan Höppner ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 348191dc4a19SJan Höppner ras_data->lss = private->ned->ID; 348291dc4a19SJan Höppner ras_data->dev_addr = private->ned->unit_addr; 348391dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 348491dc4a19SJan Höppner 348591dc4a19SJan Höppner if (by_extent) { 348691dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 348791dc4a19SJan Höppner cur_from_trk = first_trk; 348891dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 348991dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 349091dc4a19SJan Höppner if (cur_to_trk > last_trk) 349191dc4a19SJan Höppner cur_to_trk = last_trk; 349291dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 349391dc4a19SJan Höppner 349491dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 349591dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 349691dc4a19SJan Höppner beg_head = cur_from_trk % heads; 349791dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 349891dc4a19SJan Höppner end_head = cur_to_trk % heads; 349991dc4a19SJan Höppner 350091dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 350191dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 350291dc4a19SJan Höppner 350391dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 350491dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 350591dc4a19SJan Höppner if (cur_to_trk > last_trk) 350691dc4a19SJan Höppner cur_to_trk = last_trk; 350791dc4a19SJan Höppner ras_range++; 350891dc4a19SJan Höppner } 350991dc4a19SJan Höppner } 351091dc4a19SJan Höppner 351191dc4a19SJan Höppner ccw = cqr->cpaddr; 351291dc4a19SJan Höppner ccw->cda = (__u32)(addr_t)cqr->data; 351391dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 351491dc4a19SJan Höppner ccw->count = size; 351591dc4a19SJan Höppner 351691dc4a19SJan Höppner cqr->startdev = device; 351791dc4a19SJan Höppner cqr->memdev = device; 351891dc4a19SJan Höppner cqr->block = block; 351991dc4a19SJan Höppner cqr->retries = 256; 352091dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 352191dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 352291dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 352391dc4a19SJan Höppner 352491dc4a19SJan Höppner return cqr; 352591dc4a19SJan Höppner } 352691dc4a19SJan Höppner 352791dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 352891dc4a19SJan Höppner { 352991dc4a19SJan Höppner struct dasd_ccw_req *cqr; 353091dc4a19SJan Höppner int rc; 353191dc4a19SJan Höppner 353291dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 353391dc4a19SJan Höppner if (IS_ERR(cqr)) 353491dc4a19SJan Höppner return PTR_ERR(cqr); 353591dc4a19SJan Höppner 353691dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 353791dc4a19SJan Höppner 353891dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 353991dc4a19SJan Höppner 354091dc4a19SJan Höppner return rc; 354191dc4a19SJan Höppner } 354291dc4a19SJan Höppner 354391dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 354491dc4a19SJan Höppner unsigned int from, unsigned int to) 354591dc4a19SJan Höppner { 354691dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 354791dc4a19SJan Höppner struct dasd_block *block = device->block; 354891dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 354991dc4a19SJan Höppner struct list_head ras_queue; 355091dc4a19SJan Höppner unsigned int device_exts; 355191dc4a19SJan Höppner int trks_per_ext; 355291dc4a19SJan Höppner int stop, step; 355391dc4a19SJan Höppner int cur_pos; 355491dc4a19SJan Höppner int rc = 0; 355591dc4a19SJan Höppner int retry; 355691dc4a19SJan Höppner 355791dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 355891dc4a19SJan Höppner 355991dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 356091dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 356191dc4a19SJan Höppner 356291dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 356391dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 356491dc4a19SJan Höppner cur_pos = from; 356591dc4a19SJan Höppner 356691dc4a19SJan Höppner do { 356791dc4a19SJan Höppner retry = 0; 356891dc4a19SJan Höppner while (cur_pos < to) { 356991dc4a19SJan Höppner stop = cur_pos + step - 357091dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 357191dc4a19SJan Höppner if (stop > to) 357291dc4a19SJan Höppner stop = to; 357391dc4a19SJan Höppner 357491dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 357591dc4a19SJan Höppner if (IS_ERR(cqr)) { 357691dc4a19SJan Höppner rc = PTR_ERR(cqr); 357791dc4a19SJan Höppner if (rc == -ENOMEM) { 357891dc4a19SJan Höppner if (list_empty(&ras_queue)) 357991dc4a19SJan Höppner goto out; 358091dc4a19SJan Höppner retry = 1; 358191dc4a19SJan Höppner break; 358291dc4a19SJan Höppner } 358391dc4a19SJan Höppner goto err_out; 358491dc4a19SJan Höppner } 358591dc4a19SJan Höppner 358691dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 358791dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 358891dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 358991dc4a19SJan Höppner cur_pos = stop + 1; 359091dc4a19SJan Höppner } 359191dc4a19SJan Höppner 359291dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 359391dc4a19SJan Höppner 359491dc4a19SJan Höppner err_out: 359591dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 359691dc4a19SJan Höppner device = cqr->startdev; 359791dc4a19SJan Höppner private = device->private; 359891dc4a19SJan Höppner 359991dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 360091dc4a19SJan Höppner list_del_init(&cqr->blocklist); 360191dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 360291dc4a19SJan Höppner dasd_sfree_request(cqr, device); 360391dc4a19SJan Höppner private->count--; 360491dc4a19SJan Höppner } 360591dc4a19SJan Höppner } while (retry); 360691dc4a19SJan Höppner 360791dc4a19SJan Höppner out: 360891dc4a19SJan Höppner return rc; 360991dc4a19SJan Höppner } 361091dc4a19SJan Höppner 361191dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 361291dc4a19SJan Höppner struct format_data_t *rdata) 361391dc4a19SJan Höppner { 361491dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 361591dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 361691dc4a19SJan Höppner else if (rdata->intensity == 0) 361791dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 361891dc4a19SJan Höppner rdata->stop_unit); 361991dc4a19SJan Höppner else 362091dc4a19SJan Höppner return -EINVAL; 362191dc4a19SJan Höppner } 362291dc4a19SJan Höppner 36237e64db15SJan Höppner static struct dasd_ccw_req * 36247e64db15SJan Höppner dasd_eckd_build_cp_discard(struct dasd_device *device, struct dasd_block *block, 36257e64db15SJan Höppner struct request *req, sector_t first_trk, 36267e64db15SJan Höppner sector_t last_trk) 36277e64db15SJan Höppner { 36287e64db15SJan Höppner return dasd_eckd_dso_ras(device, block, req, first_trk, last_trk, 1); 36297e64db15SJan Höppner } 36307e64db15SJan Höppner 3631f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3632f3eb5384SStefan Weinhuber struct dasd_device *startdev, 36338e09f215SStefan Weinhuber struct dasd_block *block, 3634f3eb5384SStefan Weinhuber struct request *req, 3635f3eb5384SStefan Weinhuber sector_t first_rec, 3636f3eb5384SStefan Weinhuber sector_t last_rec, 3637f3eb5384SStefan Weinhuber sector_t first_trk, 3638f3eb5384SStefan Weinhuber sector_t last_trk, 3639f3eb5384SStefan Weinhuber unsigned int first_offs, 3640f3eb5384SStefan Weinhuber unsigned int last_offs, 3641f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3642f3eb5384SStefan Weinhuber unsigned int blksize) 36431da177e4SLinus Torvalds { 36441da177e4SLinus Torvalds struct dasd_eckd_private *private; 36451da177e4SLinus Torvalds unsigned long *idaws; 36461da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 36471da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36481da177e4SLinus Torvalds struct ccw1 *ccw; 36495705f702SNeilBrown struct req_iterator iter; 36507988613bSKent Overstreet struct bio_vec bv; 36511da177e4SLinus Torvalds char *dst; 3652f3eb5384SStefan Weinhuber unsigned int off; 36531da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3654f3eb5384SStefan Weinhuber sector_t recid; 36551da177e4SLinus Torvalds unsigned char cmd, rcmd; 36568e09f215SStefan Weinhuber int use_prefix; 36578e09f215SStefan Weinhuber struct dasd_device *basedev; 36581da177e4SLinus Torvalds 36598e09f215SStefan Weinhuber basedev = block->base; 3660543691a4SSebastian Ott private = basedev->private; 36611da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 36621da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 36631da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 36641da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 36651da177e4SLinus Torvalds else 36661da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3667f3eb5384SStefan Weinhuber 36681da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 36691da177e4SLinus Torvalds count = 0; 36701da177e4SLinus Torvalds cidaw = 0; 36715705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 36727988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 36731da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 36741da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 36757988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 36767988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 36777988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 36781da177e4SLinus Torvalds } 36791da177e4SLinus Torvalds /* Paranoia. */ 36801da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 36811da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 36828e09f215SStefan Weinhuber 36838e09f215SStefan Weinhuber /* use the prefix command if available */ 36848e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 36858e09f215SStefan Weinhuber if (use_prefix) { 36868e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 36878e09f215SStefan Weinhuber cplength = 2 + count; 36888e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 36898e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 36908e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 36918e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 36928e09f215SStefan Weinhuber } else { 36931da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 36941da177e4SLinus Torvalds cplength = 2 + count; 36951da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 36968e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 36978e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 36981da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 36998e09f215SStefan Weinhuber } 37001da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 37011da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 37021da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 37031da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 37041da177e4SLinus Torvalds cplength += count; 37051da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 37061da177e4SLinus Torvalds } 37071da177e4SLinus Torvalds /* Allocate the ccw request. */ 370868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3709c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 37101da177e4SLinus Torvalds if (IS_ERR(cqr)) 37111da177e4SLinus Torvalds return cqr; 37121da177e4SLinus Torvalds ccw = cqr->cpaddr; 37138e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 37148e09f215SStefan Weinhuber if (use_prefix) { 37158e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 37168e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 37178e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 37188e09f215SStefan Weinhuber * Try again later. 37198e09f215SStefan Weinhuber */ 37208e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3721d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3722d54853efSMartin Schwidefsky } 37238e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 37248e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 37258e09f215SStefan Weinhuber } else { 37268e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 372745f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 37288e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 37298e09f215SStefan Weinhuber * Try again later. 37308e09f215SStefan Weinhuber */ 37318e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 37328e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 37338e09f215SStefan Weinhuber } 37348e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 37358e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 37368e09f215SStefan Weinhuber } 37371da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 37381da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 37391da177e4SLinus Torvalds recid = first_rec; 37401da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 37411da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 37421da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 37431da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 37448e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 37451da177e4SLinus Torvalds } 37465705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 37477988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 37481da177e4SLinus Torvalds if (dasd_page_cache) { 37491da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3750441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 37511da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 37527988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 37531da177e4SLinus Torvalds if (copy) 37547988613bSKent Overstreet dst = copy + bv.bv_offset; 37551da177e4SLinus Torvalds } 37567988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 37571da177e4SLinus Torvalds sector_t trkid = recid; 37581da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 37591da177e4SLinus Torvalds rcmd = cmd; 37601da177e4SLinus Torvalds count = blksize; 37611da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 37621da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 37631da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 37641da177e4SLinus Torvalds rcmd |= 0x8; 37651da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3766ec5883abSHorst Hummel if (count < blksize && 3767ec5883abSHorst Hummel rq_data_dir(req) == READ) 37681da177e4SLinus Torvalds memset(dst + count, 0xe5, 37691da177e4SLinus Torvalds blksize - count); 37701da177e4SLinus Torvalds } 37711da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 37721da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 37731da177e4SLinus Torvalds trkid, recoffs + 1, 37748e09f215SStefan Weinhuber 1, rcmd, basedev, count); 37751da177e4SLinus Torvalds } 37761da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 37771da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 37781da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 37791da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 37801da177e4SLinus Torvalds trkid, recoffs + 1, 37811da177e4SLinus Torvalds last_rec - recid + 1, 37828e09f215SStefan Weinhuber cmd, basedev, count); 37831da177e4SLinus Torvalds } 37841da177e4SLinus Torvalds /* Read/write ccw. */ 37851da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 37861da177e4SLinus Torvalds ccw->cmd_code = rcmd; 37871da177e4SLinus Torvalds ccw->count = count; 37881da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 37891da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 37901da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 37911da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 37921da177e4SLinus Torvalds } else { 37931da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 37941da177e4SLinus Torvalds ccw->flags = 0; 37951da177e4SLinus Torvalds } 37961da177e4SLinus Torvalds ccw++; 37971da177e4SLinus Torvalds dst += blksize; 37981da177e4SLinus Torvalds recid++; 37991da177e4SLinus Torvalds } 38001da177e4SLinus Torvalds } 380113de227bSHolger Smolinski if (blk_noretry_request(req) || 380213de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 38031c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 38048e09f215SStefan Weinhuber cqr->startdev = startdev; 38058e09f215SStefan Weinhuber cqr->memdev = startdev; 38068e09f215SStefan Weinhuber cqr->block = block; 38077c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3808c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 38091f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 38101aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 38111da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 38125e2b17e7SJan Höppner 38135e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 38145e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 38155e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 38165e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 38175e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 38185e2b17e7SJan Höppner } 38195e2b17e7SJan Höppner 38201da177e4SLinus Torvalds return cqr; 38211da177e4SLinus Torvalds } 38221da177e4SLinus Torvalds 3823f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3824f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3825f3eb5384SStefan Weinhuber struct dasd_block *block, 3826f3eb5384SStefan Weinhuber struct request *req, 3827f3eb5384SStefan Weinhuber sector_t first_rec, 3828f3eb5384SStefan Weinhuber sector_t last_rec, 3829f3eb5384SStefan Weinhuber sector_t first_trk, 3830f3eb5384SStefan Weinhuber sector_t last_trk, 3831f3eb5384SStefan Weinhuber unsigned int first_offs, 3832f3eb5384SStefan Weinhuber unsigned int last_offs, 3833f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3834f3eb5384SStefan Weinhuber unsigned int blksize) 3835f3eb5384SStefan Weinhuber { 3836f3eb5384SStefan Weinhuber unsigned long *idaws; 3837f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3838f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3839f3eb5384SStefan Weinhuber struct req_iterator iter; 38407988613bSKent Overstreet struct bio_vec bv; 3841f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3842f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3843f3eb5384SStefan Weinhuber unsigned int tlf; 3844f3eb5384SStefan Weinhuber sector_t recid; 3845f3eb5384SStefan Weinhuber unsigned char cmd; 3846f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3847f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3848f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3849f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3850f3eb5384SStefan Weinhuber sector_t trkid; 3851f3eb5384SStefan Weinhuber unsigned int recoffs; 3852f3eb5384SStefan Weinhuber 3853f3eb5384SStefan Weinhuber basedev = block->base; 3854f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3855f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3856f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3857f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3858f3eb5384SStefan Weinhuber else 3859f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3860f3eb5384SStefan Weinhuber 3861f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3862f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3863f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3864f3eb5384SStefan Weinhuber * of records as upper limit. 3865f3eb5384SStefan Weinhuber */ 3866f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3867f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3868f3eb5384SStefan Weinhuber 3869f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3870f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3871f3eb5384SStefan Weinhuber 38727bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 3873f3eb5384SStefan Weinhuber 3874f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 387568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3876c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 3877f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3878f3eb5384SStefan Weinhuber return cqr; 3879f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3880f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3881f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3882f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3883f3eb5384SStefan Weinhuber else 3884f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3885f3eb5384SStefan Weinhuber tlf *= blksize; 3886f3eb5384SStefan Weinhuber 3887f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3888f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3889f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3890f3eb5384SStefan Weinhuber trkcount, blksize, 3891f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3892f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3893f3eb5384SStefan Weinhuber * Try again later. 3894f3eb5384SStefan Weinhuber */ 3895f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3896f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3897f3eb5384SStefan Weinhuber } 3898f3eb5384SStefan Weinhuber 3899f3eb5384SStefan Weinhuber /* 3900f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3901f3eb5384SStefan Weinhuber * following conditions: 3902f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3903f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3904f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3905f3eb5384SStefan Weinhuber */ 3906f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3907f3eb5384SStefan Weinhuber recid = first_rec; 3908f3eb5384SStefan Weinhuber new_track = 1; 3909f3eb5384SStefan Weinhuber end_idaw = 0; 3910f3eb5384SStefan Weinhuber len_to_track_end = 0; 3911246ccea1SMartin Schwidefsky idaw_dst = NULL; 3912f3eb5384SStefan Weinhuber idaw_len = 0; 3913f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 39147988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39157988613bSKent Overstreet seg_len = bv.bv_len; 3916f3eb5384SStefan Weinhuber while (seg_len) { 3917f3eb5384SStefan Weinhuber if (new_track) { 3918f3eb5384SStefan Weinhuber trkid = recid; 3919f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3920f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3921f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3922f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3923f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3924f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3925f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3926f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3927f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3928f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3929f3eb5384SStefan Weinhuber ccw++; 3930f3eb5384SStefan Weinhuber recid += count; 3931f3eb5384SStefan Weinhuber new_track = 0; 393252db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 393352db45c3SStefan Weinhuber if (!idaw_dst) 393452db45c3SStefan Weinhuber idaw_dst = dst; 3935f3eb5384SStefan Weinhuber } 393652db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 393752db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3938f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3939f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3940f3eb5384SStefan Weinhuber * idaw ends 3941f3eb5384SStefan Weinhuber */ 394252db45c3SStefan Weinhuber if (!idaw_dst) { 394352db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 394452db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 394552db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 394652db45c3SStefan Weinhuber } else 3947f3eb5384SStefan Weinhuber idaw_dst = dst; 394852db45c3SStefan Weinhuber } 3949f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3950f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3951f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3952f3eb5384SStefan Weinhuber } 3953f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3954f3eb5384SStefan Weinhuber seg_len -= part_len; 3955f3eb5384SStefan Weinhuber dst += part_len; 3956f3eb5384SStefan Weinhuber idaw_len += part_len; 3957f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 3958f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 3959f3eb5384SStefan Weinhuber * -> create an idaw 3960f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 3961f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 3962f3eb5384SStefan Weinhuber */ 3963f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3964f3eb5384SStefan Weinhuber end_idaw = 1; 3965f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 3966f3eb5384SStefan Weinhuber if (!len_to_track_end) { 3967f3eb5384SStefan Weinhuber new_track = 1; 3968f3eb5384SStefan Weinhuber end_idaw = 1; 3969f3eb5384SStefan Weinhuber } 3970f3eb5384SStefan Weinhuber if (end_idaw) { 3971f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 3972f3eb5384SStefan Weinhuber idaw_len); 3973246ccea1SMartin Schwidefsky idaw_dst = NULL; 3974f3eb5384SStefan Weinhuber idaw_len = 0; 3975f3eb5384SStefan Weinhuber end_idaw = 0; 3976f3eb5384SStefan Weinhuber } 3977f3eb5384SStefan Weinhuber } 3978f3eb5384SStefan Weinhuber } 3979f3eb5384SStefan Weinhuber 3980f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3981f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3982f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3983f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3984f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3985f3eb5384SStefan Weinhuber cqr->block = block; 39867c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3987c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 39881f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 39891aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3990f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 39915e2b17e7SJan Höppner 39925e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 39935e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 39945e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 39955e2b17e7SJan Höppner 3996f3eb5384SStefan Weinhuber return cqr; 3997f3eb5384SStefan Weinhuber } 3998f3eb5384SStefan Weinhuber 3999f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4000f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4001f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4002f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4003f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4004f3eb5384SStefan Weinhuber unsigned int blksize, 4005f3eb5384SStefan Weinhuber unsigned int total_data_size, 4006f3eb5384SStefan Weinhuber unsigned int tlf, 4007f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4008f3eb5384SStefan Weinhuber { 4009f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4010f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4011f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4012f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4013f3eb5384SStefan Weinhuber struct dcw *dcw; 4014f3eb5384SStefan Weinhuber 4015f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4016f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4017f3eb5384SStefan Weinhuber u8 pfx_cmd; 4018f3eb5384SStefan Weinhuber 4019f3eb5384SStefan Weinhuber int rc = 0; 4020f3eb5384SStefan Weinhuber int sector = 0; 4021f3eb5384SStefan Weinhuber int dn, d; 4022f3eb5384SStefan Weinhuber 4023f3eb5384SStefan Weinhuber 4024f3eb5384SStefan Weinhuber /* setup prefix data */ 4025543691a4SSebastian Ott basepriv = basedev->private; 4026543691a4SSebastian Ott startpriv = startdev->private; 4027f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4028f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4029f3eb5384SStefan Weinhuber 4030f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4031f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4032f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 4033f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 4034f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4035f3eb5384SStefan Weinhuber 4036f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4037da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4038f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4039da340f92SStefan Haberland 4040da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4041da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4042f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4043f3eb5384SStefan Weinhuber } 4044f3eb5384SStefan Weinhuber 4045f3eb5384SStefan Weinhuber switch (cmd) { 4046f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4047f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4048f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4049f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4050f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4051f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4052f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4053f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4054f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4055f3eb5384SStefan Weinhuber break; 4056f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4057f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4058f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4059f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 40605628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4061f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4062f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4063f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4064f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4065f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 406645f186beSJan Höppner /* 406745f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 406845f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 406945f186beSJan Höppner * data as well. 407045f186beSJan Höppner */ 407145f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 407245f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4073f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4074f3eb5384SStefan Weinhuber break; 40758fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 40768fd57520SJan Höppner dedata->mask.perm = 0x1; 40778fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 40788fd57520SJan Höppner dedata->ga_extended |= 0x42; 40798fd57520SJan Höppner dedata->blk_size = blksize; 40808fd57520SJan Höppner lredata->operation.orientation = 0x2; 40818fd57520SJan Höppner lredata->operation.operation = 0x16; 40828fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 40838fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 40848fd57520SJan Höppner break; 4085f3eb5384SStefan Weinhuber default: 4086f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4087f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4088f3eb5384SStefan Weinhuber BUG(); 4089f3eb5384SStefan Weinhuber break; 4090f3eb5384SStefan Weinhuber } 4091f3eb5384SStefan Weinhuber if (rc) 4092f3eb5384SStefan Weinhuber return rc; 4093f3eb5384SStefan Weinhuber 4094f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4095f3eb5384SStefan Weinhuber 4096f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4097f3eb5384SStefan Weinhuber begcyl = trk / heads; 4098f3eb5384SStefan Weinhuber beghead = trk % heads; 4099f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4100f3eb5384SStefan Weinhuber endhead = totrk % heads; 4101f3eb5384SStefan Weinhuber 4102f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4103f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4104f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4105f3eb5384SStefan Weinhuber 4106f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4107f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4108f3eb5384SStefan Weinhuber else 4109f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4110f3eb5384SStefan Weinhuber } 4111f3eb5384SStefan Weinhuber 4112f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4113f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4114f3eb5384SStefan Weinhuber 4115f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4116f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4117f3eb5384SStefan Weinhuber 4118f3eb5384SStefan Weinhuber if (rec_on_trk) { 4119f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4120f3eb5384SStefan Weinhuber case 0x3390: 4121f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4122f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4123f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4124f3eb5384SStefan Weinhuber break; 4125f3eb5384SStefan Weinhuber case 0x3380: 4126f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4127f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4128f3eb5384SStefan Weinhuber break; 4129f3eb5384SStefan Weinhuber } 4130f3eb5384SStefan Weinhuber } 4131f3eb5384SStefan Weinhuber 41328fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 41338fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 41348fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 41358fd57520SJan Höppner lredata->sector = 0xff; 41368fd57520SJan Höppner } else { 4137f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4138f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 41398fd57520SJan Höppner lredata->sector = sector; 41408fd57520SJan Höppner } 4141f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4142f3eb5384SStefan Weinhuber lredata->length = tlf; 4143f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4144f3eb5384SStefan Weinhuber lredata->count = count; 4145f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4146f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4147f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4148f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4149f3eb5384SStefan Weinhuber 4150f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4151f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4152757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4153f3eb5384SStefan Weinhuber } 4154f3eb5384SStefan Weinhuber 4155f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4156f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4157f3eb5384SStefan Weinhuber struct dasd_block *block, 4158f3eb5384SStefan Weinhuber struct request *req, 4159f3eb5384SStefan Weinhuber sector_t first_rec, 4160f3eb5384SStefan Weinhuber sector_t last_rec, 4161f3eb5384SStefan Weinhuber sector_t first_trk, 4162f3eb5384SStefan Weinhuber sector_t last_trk, 4163f3eb5384SStefan Weinhuber unsigned int first_offs, 4164f3eb5384SStefan Weinhuber unsigned int last_offs, 4165f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4166f3eb5384SStefan Weinhuber unsigned int blksize) 4167f3eb5384SStefan Weinhuber { 4168f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4169f3eb5384SStefan Weinhuber struct req_iterator iter; 41707988613bSKent Overstreet struct bio_vec bv; 4171f3eb5384SStefan Weinhuber char *dst; 4172f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4173f3eb5384SStefan Weinhuber unsigned char cmd; 4174f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4175f3eb5384SStefan Weinhuber unsigned int tlf; 4176f3eb5384SStefan Weinhuber struct itcw *itcw; 4177f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4178f3eb5384SStefan Weinhuber int itcw_op; 4179f3eb5384SStefan Weinhuber size_t itcw_size; 4180ef19298bSStefan Weinhuber u8 tidaw_flags; 4181ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4182ef19298bSStefan Weinhuber unsigned char new_track; 4183ef19298bSStefan Weinhuber sector_t recid, trkid; 4184ef19298bSStefan Weinhuber unsigned int offs; 4185ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4186cd10502bSJulia Lawall int ret; 4187f3eb5384SStefan Weinhuber 4188f3eb5384SStefan Weinhuber basedev = block->base; 4189f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4190f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4191f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4192f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4193f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4194f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4195f3eb5384SStefan Weinhuber } else 4196f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4197f3eb5384SStefan Weinhuber 4198f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4199f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4200f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4201ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4202ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4203f3eb5384SStefan Weinhuber */ 4204f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4205f3eb5384SStefan Weinhuber ctidaw = 0; 4206f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4207f3eb5384SStefan Weinhuber ++ctidaw; 4208f3eb5384SStefan Weinhuber } 4209ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4210ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4211f3eb5384SStefan Weinhuber 4212f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4213f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4214c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4215c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4216f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4217f3eb5384SStefan Weinhuber return cqr; 4218f3eb5384SStefan Weinhuber 4219f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4220f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4221f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4222f3eb5384SStefan Weinhuber else 4223f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4224f3eb5384SStefan Weinhuber tlf *= blksize; 4225f3eb5384SStefan Weinhuber 4226f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4227ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4228cd10502bSJulia Lawall ret = -EINVAL; 4229cd10502bSJulia Lawall goto out_error; 4230ef19298bSStefan Weinhuber } 4231f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4232f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4233f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4234f3eb5384SStefan Weinhuber first_offs + 1, 4235f3eb5384SStefan Weinhuber trkcount, blksize, 4236f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4237f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4238f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4239f3eb5384SStefan Weinhuber * Try again later. 4240f3eb5384SStefan Weinhuber */ 4241cd10502bSJulia Lawall ret = -EAGAIN; 4242cd10502bSJulia Lawall goto out_error; 4243f3eb5384SStefan Weinhuber } 4244d54cddb6SHeiko Carstens len_to_track_end = 0; 4245f3eb5384SStefan Weinhuber /* 4246f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4247f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4248f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4249f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4250ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4251ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4252f3eb5384SStefan Weinhuber */ 4253ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4254ef19298bSStefan Weinhuber new_track = 1; 4255ef19298bSStefan Weinhuber recid = first_rec; 4256f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 42577988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 42587988613bSKent Overstreet seg_len = bv.bv_len; 4259ef19298bSStefan Weinhuber while (seg_len) { 4260ef19298bSStefan Weinhuber if (new_track) { 4261ef19298bSStefan Weinhuber trkid = recid; 4262ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4263ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4264ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4265ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4266ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4267ef19298bSStefan Weinhuber recid += count; 4268ef19298bSStefan Weinhuber new_track = 0; 4269f3eb5384SStefan Weinhuber } 4270ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4271ef19298bSStefan Weinhuber seg_len -= part_len; 4272ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4273ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4274ef19298bSStefan Weinhuber if (!len_to_track_end) { 4275ef19298bSStefan Weinhuber new_track = 1; 4276ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4277ef19298bSStefan Weinhuber } else 4278ef19298bSStefan Weinhuber tidaw_flags = 0; 4279ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4280ef19298bSStefan Weinhuber dst, part_len); 4281cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4282cd10502bSJulia Lawall ret = -EINVAL; 4283cd10502bSJulia Lawall goto out_error; 4284cd10502bSJulia Lawall } 4285ef19298bSStefan Weinhuber dst += part_len; 4286ef19298bSStefan Weinhuber } 4287ef19298bSStefan Weinhuber } 4288ef19298bSStefan Weinhuber } else { 4289ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 42907988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 4291ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 42927988613bSKent Overstreet dst, bv.bv_len); 4293cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4294cd10502bSJulia Lawall ret = -EINVAL; 4295cd10502bSJulia Lawall goto out_error; 4296cd10502bSJulia Lawall } 4297ef19298bSStefan Weinhuber } 4298ef19298bSStefan Weinhuber } 4299ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4300ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4301f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4302f3eb5384SStefan Weinhuber 4303f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4304f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4305f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4306ef19298bSStefan Weinhuber cqr->cpmode = 1; 4307f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4308f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4309f3eb5384SStefan Weinhuber cqr->block = block; 43107c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4311c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 43121f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 43131aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4314f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 43155e2b17e7SJan Höppner 43165e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 43175e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 43185e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 43195e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 43205e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 43215e2b17e7SJan Höppner } 43225e2b17e7SJan Höppner 4323f3eb5384SStefan Weinhuber return cqr; 4324cd10502bSJulia Lawall out_error: 4325cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4326cd10502bSJulia Lawall return ERR_PTR(ret); 4327f3eb5384SStefan Weinhuber } 4328f3eb5384SStefan Weinhuber 4329f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4330f3eb5384SStefan Weinhuber struct dasd_block *block, 4331f3eb5384SStefan Weinhuber struct request *req) 4332f3eb5384SStefan Weinhuber { 4333ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4334f3eb5384SStefan Weinhuber int use_prefix; 4335ef19298bSStefan Weinhuber int fcx_multitrack; 433645b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4337f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4338f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4339f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4340f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4341f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4342f3eb5384SStefan Weinhuber int cdlspecial; 4343ef19298bSStefan Weinhuber unsigned int data_size; 4344f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4345f3eb5384SStefan Weinhuber 4346f3eb5384SStefan Weinhuber basedev = block->base; 4347543691a4SSebastian Ott private = basedev->private; 4348f3eb5384SStefan Weinhuber 4349f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4350f3eb5384SStefan Weinhuber blksize = block->bp_block; 4351f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 43526fca97a9SStefan Haberland if (blk_per_trk == 0) 43536fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4354f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 435583096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4356f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4357f3eb5384SStefan Weinhuber last_rec = last_trk = 435883096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4359f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4360f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4361f3eb5384SStefan Weinhuber 4362ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4363ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 436426a35f37SStefan Weinhuber if (data_size % blksize) 436526a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4366ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4367ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4368ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4369f3eb5384SStefan Weinhuber 4370f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4371f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4372f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4373f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4374f3eb5384SStefan Weinhuber 43757e64db15SJan Höppner if (req_op(req) == REQ_OP_DISCARD) 43767e64db15SJan Höppner return dasd_eckd_build_cp_discard(startdev, block, req, 43777e64db15SJan Höppner first_trk, last_trk); 43787e64db15SJan Höppner 4379f3eb5384SStefan Weinhuber cqr = NULL; 4380f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4381f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4382ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4383ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4384f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4385f3eb5384SStefan Weinhuber first_rec, last_rec, 4386f3eb5384SStefan Weinhuber first_trk, last_trk, 4387f3eb5384SStefan Weinhuber first_offs, last_offs, 4388f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4389ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4390ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4391f3eb5384SStefan Weinhuber cqr = NULL; 4392f3eb5384SStefan Weinhuber } else if (use_prefix && 4393f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4394f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4395f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4396f3eb5384SStefan Weinhuber first_rec, last_rec, 4397f3eb5384SStefan Weinhuber first_trk, last_trk, 4398f3eb5384SStefan Weinhuber first_offs, last_offs, 4399f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4400ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4401ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4402f3eb5384SStefan Weinhuber cqr = NULL; 4403f3eb5384SStefan Weinhuber } 4404f3eb5384SStefan Weinhuber if (!cqr) 4405f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4406f3eb5384SStefan Weinhuber first_rec, last_rec, 4407f3eb5384SStefan Weinhuber first_trk, last_trk, 4408f3eb5384SStefan Weinhuber first_offs, last_offs, 4409f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4410f3eb5384SStefan Weinhuber return cqr; 4411f3eb5384SStefan Weinhuber } 4412f3eb5384SStefan Weinhuber 4413bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4414e4dbb0f2SStefan Haberland struct dasd_block *block, 4415e4dbb0f2SStefan Haberland struct request *req) 4416e4dbb0f2SStefan Haberland { 44179d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4418e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4419e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4420558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 44219d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 44229d2be0c1SJan Höppner struct dasd_device *basedev; 44239d2be0c1SJan Höppner struct req_iterator iter; 44249d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 44259d2be0c1SJan Höppner unsigned int first_offs; 44269d2be0c1SJan Höppner unsigned int trkcount; 44279d2be0c1SJan Höppner unsigned long *idaws; 44289d2be0c1SJan Höppner unsigned int size; 44299d2be0c1SJan Höppner unsigned char cmd; 44309d2be0c1SJan Höppner struct bio_vec bv; 44319d2be0c1SJan Höppner struct ccw1 *ccw; 44329d2be0c1SJan Höppner int use_prefix; 44339d2be0c1SJan Höppner void *data; 44349d2be0c1SJan Höppner char *dst; 4435e4dbb0f2SStefan Haberland 4436e4dbb0f2SStefan Haberland /* 4437e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4438558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4439558b9ef0SStefan Weinhuber * the request with dummy pages. 4440e4dbb0f2SStefan Haberland */ 4441558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4442558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4443558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4444558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4445558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4446558b9ef0SStefan Weinhuber basedev = block->base; 4447558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4448558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4449558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4450e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4451558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 44529d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4453e4dbb0f2SStefan Haberland } 4454e4dbb0f2SStefan Haberland 4455e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4456e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4457e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4458e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4459e4dbb0f2SStefan Haberland first_offs = 0; 4460e4dbb0f2SStefan Haberland 4461e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4462e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4463e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4464e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 44659d2be0c1SJan Höppner else 44669d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4467e4dbb0f2SStefan Haberland 4468e4dbb0f2SStefan Haberland /* 4469e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4470e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4471e4dbb0f2SStefan Haberland */ 4472e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4473e4dbb0f2SStefan Haberland 4474e4dbb0f2SStefan Haberland /* 44759d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 44769d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4477e4dbb0f2SStefan Haberland */ 44789d2be0c1SJan Höppner base_priv = basedev->private; 44799d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 44809d2be0c1SJan Höppner if (use_prefix) { 44819d2be0c1SJan Höppner cplength = 1 + trkcount; 44829d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 44839d2be0c1SJan Höppner } else { 44849d2be0c1SJan Höppner cplength = 2 + trkcount; 44859d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 44869d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 44879d2be0c1SJan Höppner } 44889d2be0c1SJan Höppner size = ALIGN(size, 8); 4489e4dbb0f2SStefan Haberland 44907bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4491e4dbb0f2SStefan Haberland 4492e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4493e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4494c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4495e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 44969d2be0c1SJan Höppner return cqr; 4497e4dbb0f2SStefan Haberland 44989d2be0c1SJan Höppner ccw = cqr->cpaddr; 44999d2be0c1SJan Höppner data = cqr->data; 45009d2be0c1SJan Höppner 45019d2be0c1SJan Höppner if (use_prefix) { 45029d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 45039d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 45049d2be0c1SJan Höppner } else { 45059d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 45069d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 45079d2be0c1SJan Höppner 45089d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 45099d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 45109d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4511e4dbb0f2SStefan Haberland } 4512e4dbb0f2SStefan Haberland 45139d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4514e4dbb0f2SStefan Haberland len_to_track_end = 0; 4515558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4516558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4517558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4518558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4519558b9ef0SStefan Weinhuber ccw->count = 57326; 4520558b9ef0SStefan Weinhuber /* 64k map to one track */ 4521558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4522558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4523558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4524558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4525558b9ef0SStefan Weinhuber ccw++; 4526558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4527558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4528558b9ef0SStefan Weinhuber } 4529e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 45307988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 45317988613bSKent Overstreet seg_len = bv.bv_len; 4532558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4533558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4534e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4535e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4536e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4537e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4538e4dbb0f2SStefan Haberland ccw->count = 57326; 4539e4dbb0f2SStefan Haberland /* 64k map to one track */ 4540e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4541e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4542e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4543e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4544e4dbb0f2SStefan Haberland ccw++; 4545e4dbb0f2SStefan Haberland } 4546e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4547e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4548e4dbb0f2SStefan Haberland } 4549558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4550558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4551e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4552e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4553e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4554e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4555e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4556e4dbb0f2SStefan Haberland cqr->block = block; 4557e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4558c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 45591f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 45601aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4561e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4562e4dbb0f2SStefan Haberland 4563e4dbb0f2SStefan Haberland return cqr; 4564e4dbb0f2SStefan Haberland } 4565e4dbb0f2SStefan Haberland 4566e4dbb0f2SStefan Haberland 45671da177e4SLinus Torvalds static int 45681da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 45691da177e4SLinus Torvalds { 45701da177e4SLinus Torvalds struct dasd_eckd_private *private; 45711da177e4SLinus Torvalds struct ccw1 *ccw; 45725705f702SNeilBrown struct req_iterator iter; 45737988613bSKent Overstreet struct bio_vec bv; 45741da177e4SLinus Torvalds char *dst, *cda; 45751da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 45761da177e4SLinus Torvalds sector_t recid; 45775705f702SNeilBrown int status; 45781da177e4SLinus Torvalds 45791da177e4SLinus Torvalds if (!dasd_page_cache) 45801da177e4SLinus Torvalds goto out; 4581543691a4SSebastian Ott private = cqr->block->base->private; 45828e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 45831da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 458483096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 45851da177e4SLinus Torvalds ccw = cqr->cpaddr; 45861da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 45871da177e4SLinus Torvalds ccw++; 45881da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 45891da177e4SLinus Torvalds ccw++; 45905705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 45917988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 45927988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 45931da177e4SLinus Torvalds /* Skip locate record. */ 45941da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 45951da177e4SLinus Torvalds ccw++; 45961da177e4SLinus Torvalds if (dst) { 45971da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 45981da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 45991da177e4SLinus Torvalds else 46001da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 46011da177e4SLinus Torvalds if (dst != cda) { 46021da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 46037988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 46041da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 46051da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 46061da177e4SLinus Torvalds } 46071da177e4SLinus Torvalds dst = NULL; 46081da177e4SLinus Torvalds } 46091da177e4SLinus Torvalds ccw++; 46101da177e4SLinus Torvalds recid++; 46111da177e4SLinus Torvalds } 46121da177e4SLinus Torvalds } 46131da177e4SLinus Torvalds out: 46141da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 46158e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 46161da177e4SLinus Torvalds return status; 46171da177e4SLinus Torvalds } 46181da177e4SLinus Torvalds 46198e09f215SStefan Weinhuber /* 4620f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 46218e09f215SStefan Weinhuber * 46228e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 46238e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 46248e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 46258e09f215SStefan Weinhuber */ 46268e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 46278e09f215SStefan Weinhuber { 46288e09f215SStefan Weinhuber struct ccw1 *ccw; 46298e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4630f3eb5384SStefan Weinhuber struct tcw *tcw; 4631f3eb5384SStefan Weinhuber struct tccb *tccb; 4632f3eb5384SStefan Weinhuber struct dcw *dcw; 46338e09f215SStefan Weinhuber 4634f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4635f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4636f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4637f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4638f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4639f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4640f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4641f3eb5384SStefan Weinhuber } else { 46428e09f215SStefan Weinhuber ccw = cqr->cpaddr; 46438e09f215SStefan Weinhuber pfxdata = cqr->data; 46448e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 46458e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 46468e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 46478e09f215SStefan Weinhuber } 46488e09f215SStefan Weinhuber } 4649f3eb5384SStefan Weinhuber } 46508e09f215SStefan Weinhuber 46518e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 46528e09f215SStefan Weinhuber 46538e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 46548e09f215SStefan Weinhuber struct dasd_block *block, 46558e09f215SStefan Weinhuber struct request *req) 46568e09f215SStefan Weinhuber { 46577e64db15SJan Höppner struct dasd_device *startdev = NULL; 46588e09f215SStefan Weinhuber struct dasd_eckd_private *private; 46598e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 46607e64db15SJan Höppner unsigned long flags; 46618e09f215SStefan Weinhuber 46627e64db15SJan Höppner /* Discard requests can only be processed on base devices */ 46637e64db15SJan Höppner if (req_op(req) != REQ_OP_DISCARD) 46648e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 46658e09f215SStefan Weinhuber if (!startdev) 46668e09f215SStefan Weinhuber startdev = base; 4667543691a4SSebastian Ott private = startdev->private; 46688e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 46698e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 46708e09f215SStefan Weinhuber 46718e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 46728e09f215SStefan Weinhuber private->count++; 4673e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4674bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4675e4dbb0f2SStefan Haberland else 46768e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 46778e09f215SStefan Weinhuber if (IS_ERR(cqr)) 46788e09f215SStefan Weinhuber private->count--; 46798e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 46808e09f215SStefan Weinhuber return cqr; 46818e09f215SStefan Weinhuber } 46828e09f215SStefan Weinhuber 46838e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 46848e09f215SStefan Weinhuber struct request *req) 46858e09f215SStefan Weinhuber { 46868e09f215SStefan Weinhuber struct dasd_eckd_private *private; 46878e09f215SStefan Weinhuber unsigned long flags; 46888e09f215SStefan Weinhuber 46898e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4690543691a4SSebastian Ott private = cqr->memdev->private; 46918e09f215SStefan Weinhuber private->count--; 46928e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 46938e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 46948e09f215SStefan Weinhuber } 46958e09f215SStefan Weinhuber 46961da177e4SLinus Torvalds static int 46971da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 46981da177e4SLinus Torvalds struct dasd_information2_t * info) 46991da177e4SLinus Torvalds { 4700543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 47011da177e4SLinus Torvalds 47021da177e4SLinus Torvalds info->label_block = 2; 47031da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 47041da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4705543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 47061da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4707543691a4SSebastian Ott sizeof(private->rdc_data)); 47084abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 47094abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 47104abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 47114abb08c2SStefan Weinhuber info->confdata_size); 47121da177e4SLinus Torvalds return 0; 47131da177e4SLinus Torvalds } 47141da177e4SLinus Torvalds 47151da177e4SLinus Torvalds /* 47161da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 47171da177e4SLinus Torvalds */ 47181da177e4SLinus Torvalds 47191da177e4SLinus Torvalds /* 47201da177e4SLinus Torvalds * Release device ioctl. 47211da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 47221da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 47231da177e4SLinus Torvalds */ 47241da177e4SLinus Torvalds static int 47251107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 47261da177e4SLinus Torvalds { 47271da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 47281da177e4SLinus Torvalds int rc; 4729f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4730f932bceaSStefan Weinhuber int useglobal; 47311da177e4SLinus Torvalds 47321da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 47331da177e4SLinus Torvalds return -EACCES; 47341da177e4SLinus Torvalds 4735f932bceaSStefan Weinhuber useglobal = 0; 4736c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 47371da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4738f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4739f932bceaSStefan Weinhuber useglobal = 1; 4740f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4741f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4742f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4743f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4744f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4745f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4746f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 47471da177e4SLinus Torvalds } 4748f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4749f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4750f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4751f3eb5384SStefan Weinhuber ccw->count = 32; 4752f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 47538e09f215SStefan Weinhuber cqr->startdev = device; 47548e09f215SStefan Weinhuber cqr->memdev = device; 47551da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 47561c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4757336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 47581da177e4SLinus Torvalds cqr->expires = 2 * HZ; 47591aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 47601da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 47611da177e4SLinus Torvalds 47621da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 47635a27e60dSStefan Weinhuber if (!rc) 47645a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 47651da177e4SLinus Torvalds 4766f932bceaSStefan Weinhuber if (useglobal) 4767f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4768f932bceaSStefan Weinhuber else 47698e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 47701da177e4SLinus Torvalds return rc; 47711da177e4SLinus Torvalds } 47721da177e4SLinus Torvalds 47731da177e4SLinus Torvalds /* 47741da177e4SLinus Torvalds * Reserve device ioctl. 47751da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 47761da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 47771da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 47781da177e4SLinus Torvalds */ 47791da177e4SLinus Torvalds static int 47801107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 47811da177e4SLinus Torvalds { 47821da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 47831da177e4SLinus Torvalds int rc; 4784f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4785f932bceaSStefan Weinhuber int useglobal; 47861da177e4SLinus Torvalds 47871da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 47881da177e4SLinus Torvalds return -EACCES; 47891da177e4SLinus Torvalds 4790f932bceaSStefan Weinhuber useglobal = 0; 4791c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 47921da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4793f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4794f932bceaSStefan Weinhuber useglobal = 1; 4795f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4796f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4797f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4798f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4799f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4800f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4801f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 48021da177e4SLinus Torvalds } 4803f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4804f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4805f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4806f3eb5384SStefan Weinhuber ccw->count = 32; 4807f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 48088e09f215SStefan Weinhuber cqr->startdev = device; 48098e09f215SStefan Weinhuber cqr->memdev = device; 48101da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 48111c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4812336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 48131da177e4SLinus Torvalds cqr->expires = 2 * HZ; 48141aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 48151da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 48161da177e4SLinus Torvalds 48171da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 48185a27e60dSStefan Weinhuber if (!rc) 48195a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 48201da177e4SLinus Torvalds 4821f932bceaSStefan Weinhuber if (useglobal) 4822f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4823f932bceaSStefan Weinhuber else 48248e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48251da177e4SLinus Torvalds return rc; 48261da177e4SLinus Torvalds } 48271da177e4SLinus Torvalds 48281da177e4SLinus Torvalds /* 48291da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 48301da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 48311da177e4SLinus Torvalds * (unconditional reserve) 48321da177e4SLinus Torvalds */ 48331da177e4SLinus Torvalds static int 48341107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 48351da177e4SLinus Torvalds { 48361da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 48371da177e4SLinus Torvalds int rc; 4838f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4839f932bceaSStefan Weinhuber int useglobal; 48401da177e4SLinus Torvalds 48411da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 48421da177e4SLinus Torvalds return -EACCES; 48431da177e4SLinus Torvalds 4844f932bceaSStefan Weinhuber useglobal = 0; 4845c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 48461da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4847f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4848f932bceaSStefan Weinhuber useglobal = 1; 4849f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4850f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4851f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4852f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4853f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4854f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4855f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 48561da177e4SLinus Torvalds } 4857f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4858f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4859f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4860f3eb5384SStefan Weinhuber ccw->count = 32; 4861f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 48628e09f215SStefan Weinhuber cqr->startdev = device; 48638e09f215SStefan Weinhuber cqr->memdev = device; 48641da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 48651c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4866336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 48671da177e4SLinus Torvalds cqr->expires = 2 * HZ; 48681aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 48691da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 48701da177e4SLinus Torvalds 48711da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 48725a27e60dSStefan Weinhuber if (!rc) 48735a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 48741da177e4SLinus Torvalds 4875f932bceaSStefan Weinhuber if (useglobal) 4876f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4877f932bceaSStefan Weinhuber else 48788e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48791da177e4SLinus Torvalds return rc; 48801da177e4SLinus Torvalds } 48811da177e4SLinus Torvalds 48821da177e4SLinus Torvalds /* 4883196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4884196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4885196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4886196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4887196339f1SStefan Weinhuber */ 4888196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4889196339f1SStefan Weinhuber void __user *argp) 4890196339f1SStefan Weinhuber { 4891196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4892196339f1SStefan Weinhuber int rc; 4893196339f1SStefan Weinhuber struct ccw1 *ccw; 4894196339f1SStefan Weinhuber int useglobal; 4895196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4896196339f1SStefan Weinhuber 4897196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4898196339f1SStefan Weinhuber return -EACCES; 4899196339f1SStefan Weinhuber 4900196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4901196339f1SStefan Weinhuber return -EFAULT; 4902196339f1SStefan Weinhuber 4903196339f1SStefan Weinhuber useglobal = 0; 4904196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4905c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 4906c5205f2fSSebastian Ott NULL); 4907196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4908196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4909196339f1SStefan Weinhuber useglobal = 1; 4910196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4911196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4912196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4913196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4914196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4915196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4916196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4917196339f1SStefan Weinhuber } 4918196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4919196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4920196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4921196339f1SStefan Weinhuber ccw->count = 12; 4922196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4923196339f1SStefan Weinhuber cqr->startdev = device; 4924196339f1SStefan Weinhuber cqr->memdev = device; 4925196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4926196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 49275a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4928196339f1SStefan Weinhuber cqr->retries = 5; 4929196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 49301aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4931196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4932196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4933196339f1SStefan Weinhuber 4934196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4935196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4936196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4937196339f1SStefan Weinhuber rc = -EIO; 4938196339f1SStefan Weinhuber if (!rc) { 4939196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4940196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4941196339f1SStefan Weinhuber rc = -EFAULT; 4942196339f1SStefan Weinhuber } 4943196339f1SStefan Weinhuber 4944196339f1SStefan Weinhuber if (useglobal) 4945196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4946196339f1SStefan Weinhuber else 4947196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4948196339f1SStefan Weinhuber return rc; 4949196339f1SStefan Weinhuber } 4950196339f1SStefan Weinhuber 4951196339f1SStefan Weinhuber /* 49521da177e4SLinus Torvalds * Read performance statistics 49531da177e4SLinus Torvalds */ 49541da177e4SLinus Torvalds static int 49551107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 49561da177e4SLinus Torvalds { 49571da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 49581da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 49591da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 49601da177e4SLinus Torvalds struct ccw1 *ccw; 49611da177e4SLinus Torvalds int rc; 49621da177e4SLinus Torvalds 496368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 49641da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 49651da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 4966c5205f2fSSebastian Ott device, NULL); 49671da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4968fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 49691da177e4SLinus Torvalds "Could not allocate initialization request"); 49701da177e4SLinus Torvalds return PTR_ERR(cqr); 49711da177e4SLinus Torvalds } 49728e09f215SStefan Weinhuber cqr->startdev = device; 49738e09f215SStefan Weinhuber cqr->memdev = device; 49741da177e4SLinus Torvalds cqr->retries = 0; 4975eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 49761da177e4SLinus Torvalds cqr->expires = 10 * HZ; 49771da177e4SLinus Torvalds 49781da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 49791da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 49801da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 49811da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 49825d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 49831da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 49841da177e4SLinus Torvalds 49851da177e4SLinus Torvalds ccw = cqr->cpaddr; 49861da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 49871da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 49881da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 49891da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 49901da177e4SLinus Torvalds 49911da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 49921da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 49931da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 49941da177e4SLinus Torvalds 49951da177e4SLinus Torvalds ccw++; 49961da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 49971da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 49981da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 49991da177e4SLinus Torvalds 50001aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50011da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50021da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 50031da177e4SLinus Torvalds if (rc == 0) { 50041da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50051da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 50061107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 50071107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 50081107ccfbSChristoph Hellwig rc = -EFAULT; 50091da177e4SLinus Torvalds } 50108e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50111da177e4SLinus Torvalds return rc; 50121da177e4SLinus Torvalds } 50131da177e4SLinus Torvalds 50141da177e4SLinus Torvalds /* 50151da177e4SLinus Torvalds * Get attributes (cache operations) 50161da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 50171da177e4SLinus Torvalds */ 50181da177e4SLinus Torvalds static int 50191107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 50201da177e4SLinus Torvalds { 5021543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 50221107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 50231da177e4SLinus Torvalds int rc; 50241da177e4SLinus Torvalds 50251da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50261da177e4SLinus Torvalds return -EACCES; 50271107ccfbSChristoph Hellwig if (!argp) 50281da177e4SLinus Torvalds return -EINVAL; 50291da177e4SLinus Torvalds 50301107ccfbSChristoph Hellwig rc = 0; 50311107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 50321107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 50331107ccfbSChristoph Hellwig rc = -EFAULT; 50341da177e4SLinus Torvalds 50351da177e4SLinus Torvalds return rc; 50361da177e4SLinus Torvalds } 50371da177e4SLinus Torvalds 50381da177e4SLinus Torvalds /* 50391da177e4SLinus Torvalds * Set attributes (cache operations) 50401da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 50411da177e4SLinus Torvalds */ 50421da177e4SLinus Torvalds static int 50431107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 50441da177e4SLinus Torvalds { 5045543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 50461da177e4SLinus Torvalds struct attrib_data_t attrib; 50471da177e4SLinus Torvalds 50481da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50491da177e4SLinus Torvalds return -EACCES; 50501107ccfbSChristoph Hellwig if (!argp) 50511da177e4SLinus Torvalds return -EINVAL; 50521da177e4SLinus Torvalds 50531107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 50541da177e4SLinus Torvalds return -EFAULT; 50551da177e4SLinus Torvalds private->attrib = attrib; 50561da177e4SLinus Torvalds 5057fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5058fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 50591da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 50601da177e4SLinus Torvalds return 0; 50611da177e4SLinus Torvalds } 50621da177e4SLinus Torvalds 5063ab1d848fSNigel Hislop /* 5064ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5065ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5066ab1d848fSNigel Hislop */ 5067ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5068ab1d848fSNigel Hislop { 5069ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5070ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5071ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5072ab1d848fSNigel Hislop struct ccw1 *ccw; 507352898025SNigel Hislop char psf0, psf1; 5074ab1d848fSNigel Hislop int rc; 5075ab1d848fSNigel Hislop 507652898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 507752898025SNigel Hislop return -EACCES; 507852898025SNigel Hislop psf0 = psf1 = 0; 507952898025SNigel Hislop 5080ab1d848fSNigel Hislop /* Copy parms from caller */ 5081ab1d848fSNigel Hislop rc = -EFAULT; 5082ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5083ab1d848fSNigel Hislop goto out; 508492d62891SHeiko Carstens if (is_compat_task()) { 5085ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5086ab1d848fSNigel Hislop rc = -EINVAL; 5087f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5088ab1d848fSNigel Hislop goto out; 5089f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5090f8b06859SHeiko Carstens goto out; 5091f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5092f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5093ab1d848fSNigel Hislop } 50944a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 50954a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 50964a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 50974a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 50984a8ef699SStefan Haberland usrparm.psf_data_len); 50994a8ef699SStefan Haberland rc = -EINVAL; 51004a8ef699SStefan Haberland goto out; 51014a8ef699SStefan Haberland } 5102ab1d848fSNigel Hislop /* alloc I/O data area */ 5103ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5104ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5105ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5106ab1d848fSNigel Hislop rc = -ENOMEM; 5107ab1d848fSNigel Hislop goto out_free; 5108ab1d848fSNigel Hislop } 5109ab1d848fSNigel Hislop 5110ab1d848fSNigel Hislop /* get syscall header from user space */ 5111ab1d848fSNigel Hislop rc = -EFAULT; 5112ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5113ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5114ab1d848fSNigel Hislop usrparm.psf_data_len)) 5115ab1d848fSNigel Hislop goto out_free; 511652898025SNigel Hislop psf0 = psf_data[0]; 511752898025SNigel Hislop psf1 = psf_data[1]; 5118ab1d848fSNigel Hislop 5119ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5120c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5121ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5122fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5123ab1d848fSNigel Hislop "Could not allocate initialization request"); 5124ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5125ab1d848fSNigel Hislop goto out_free; 5126ab1d848fSNigel Hislop } 5127ab1d848fSNigel Hislop 5128ab1d848fSNigel Hislop cqr->startdev = device; 5129ab1d848fSNigel Hislop cqr->memdev = device; 5130ab1d848fSNigel Hislop cqr->retries = 3; 5131ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 51321aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5133ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5134ab1d848fSNigel Hislop 5135ab1d848fSNigel Hislop /* Build the ccws */ 5136ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5137ab1d848fSNigel Hislop 5138ab1d848fSNigel Hislop /* PSF ccw */ 5139ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5140ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5141ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5142ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 5143ab1d848fSNigel Hislop 5144ab1d848fSNigel Hislop ccw++; 5145ab1d848fSNigel Hislop 5146ab1d848fSNigel Hislop /* RSSD ccw */ 5147ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5148ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5149ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5150ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 5151ab1d848fSNigel Hislop 5152ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5153ab1d848fSNigel Hislop if (rc) 5154ab1d848fSNigel Hislop goto out_sfree; 5155ab1d848fSNigel Hislop 5156ab1d848fSNigel Hislop rc = -EFAULT; 5157ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5158ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5159ab1d848fSNigel Hislop goto out_sfree; 5160ab1d848fSNigel Hislop rc = 0; 5161ab1d848fSNigel Hislop 5162ab1d848fSNigel Hislop out_sfree: 5163ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5164ab1d848fSNigel Hislop out_free: 5165ab1d848fSNigel Hislop kfree(rssd_result); 5166ab1d848fSNigel Hislop kfree(psf_data); 5167ab1d848fSNigel Hislop out: 516852898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 516952898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 517052898025SNigel Hislop (int) psf0, (int) psf1, rc); 5171ab1d848fSNigel Hislop return rc; 5172ab1d848fSNigel Hislop } 5173ab1d848fSNigel Hislop 51741107ccfbSChristoph Hellwig static int 51758e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 51761107ccfbSChristoph Hellwig { 51778e09f215SStefan Weinhuber struct dasd_device *device = block->base; 51788e09f215SStefan Weinhuber 51791107ccfbSChristoph Hellwig switch (cmd) { 51801107ccfbSChristoph Hellwig case BIODASDGATTR: 51811107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 51821107ccfbSChristoph Hellwig case BIODASDSATTR: 51831107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 51841107ccfbSChristoph Hellwig case BIODASDPSRD: 51851107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 51861107ccfbSChristoph Hellwig case BIODASDRLSE: 51871107ccfbSChristoph Hellwig return dasd_eckd_release(device); 51881107ccfbSChristoph Hellwig case BIODASDRSRV: 51891107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 51901107ccfbSChristoph Hellwig case BIODASDSLCK: 51911107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5192196339f1SStefan Weinhuber case BIODASDSNID: 5193196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5194ab1d848fSNigel Hislop case BIODASDSYMMIO: 5195ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 51961107ccfbSChristoph Hellwig default: 51976b79d14eSHeiko Carstens return -ENOTTY; 51981107ccfbSChristoph Hellwig } 51991107ccfbSChristoph Hellwig } 52001107ccfbSChristoph Hellwig 52011da177e4SLinus Torvalds /* 5202445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5203445b5b49SHorst Hummel * and return number of printed chars. 5204445b5b49SHorst Hummel */ 52054d284cacSHeiko Carstens static int 5206445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5207445b5b49SHorst Hummel { 5208445b5b49SHorst Hummel int len, count; 5209445b5b49SHorst Hummel char *datap; 5210445b5b49SHorst Hummel 5211445b5b49SHorst Hummel len = 0; 5212445b5b49SHorst Hummel while (from <= to) { 5213773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5214445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5215445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5216445b5b49SHorst Hummel 5217445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5218445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5219445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 5220445b5b49SHorst Hummel else 5221445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 5222445b5b49SHorst Hummel 5223445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 5224445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 5225445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 5226445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 5227445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5228445b5b49SHorst Hummel } 5229445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5230445b5b49SHorst Hummel from++; 5231445b5b49SHorst Hummel } 5232445b5b49SHorst Hummel return len; 5233445b5b49SHorst Hummel } 5234445b5b49SHorst Hummel 5235fc19f381SStefan Haberland static void 5236aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5237aeec92caSStefan Haberland char *reason) 5238fc19f381SStefan Haberland { 5239fc19f381SStefan Haberland u64 *sense; 5240a5a0061fSStefan Weinhuber u64 *stat; 5241fc19f381SStefan Haberland 5242aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5243a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5244fc19f381SStefan Haberland if (sense) { 5245a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5246a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5247a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5248ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5249fc19f381SStefan Haberland } else { 5250a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5251a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5252a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5253fc19f381SStefan Haberland } 5254fc19f381SStefan Haberland } 5255fc19f381SStefan Haberland 5256445b5b49SHorst Hummel /* 52571da177e4SLinus Torvalds * Print sense data and related channel program. 52581da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 52591da177e4SLinus Torvalds */ 5260f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 52618e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 52621da177e4SLinus Torvalds { 52631da177e4SLinus Torvalds char *page; 5264445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5265445b5b49SHorst Hummel int len, sl, sct; 52661da177e4SLinus Torvalds 52671da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 52681da177e4SLinus Torvalds if (page == NULL) { 5269fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5270fc19f381SStefan Haberland "No memory to dump sense data\n"); 52711da177e4SLinus Torvalds return; 52721da177e4SLinus Torvalds } 5273445b5b49SHorst Hummel /* dump the sense data */ 5274773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 52751da177e4SLinus Torvalds " I/O status report for device %s:\n", 52762a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5277773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5278a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5279a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5280a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5281a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5282a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5283a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5284773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 52851da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 52862a0217d5SKay Sievers dev_name(&device->cdev->dev), 528723d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 52881da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 52891da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5290773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 52911da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 52921da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 52931da177e4SLinus Torvalds 52941da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 52951da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 52961da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 52971da177e4SLinus Torvalds } 52981da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 52991da177e4SLinus Torvalds } 53001da177e4SLinus Torvalds 53011da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 53021da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5303773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53041da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 53051da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 53061da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 53071da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 53081da177e4SLinus Torvalds } else { 53091da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5310773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53111da177e4SLinus Torvalds " 32 Byte: Format: %x " 53121da177e4SLinus Torvalds "Exception class %x\n", 53131da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 53141da177e4SLinus Torvalds } 53151da177e4SLinus Torvalds } else { 5316773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53171da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 53181da177e4SLinus Torvalds } 5319773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 53201da177e4SLinus Torvalds 53218e09f215SStefan Weinhuber if (req) { 53228e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5323445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5324445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5325445b5b49SHorst Hummel first = req->cpaddr; 5326445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5327445b5b49SHorst Hummel to = min(first + 6, last); 5328773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 53291da177e4SLinus Torvalds " Related CP in req: %p\n", req); 5330445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 5331773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 53321da177e4SLinus Torvalds 5333445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5334445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 53351da177e4SLinus Torvalds len = 0; 5336445b5b49SHorst Hummel from = ++to; 533723d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 533823d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5339445b5b49SHorst Hummel if (from < fail - 2) { 5340445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5341773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 53421da177e4SLinus Torvalds } 5343445b5b49SHorst Hummel to = min(fail + 1, last); 5344445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 53451da177e4SLinus Torvalds 5346445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5347445b5b49SHorst Hummel from = max(from, ++to); 5348445b5b49SHorst Hummel if (from < last - 1) { 5349445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5350773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 53511da177e4SLinus Torvalds } 5352445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 53531da177e4SLinus Torvalds if (len > 0) 5354773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 53558e09f215SStefan Weinhuber } 53561da177e4SLinus Torvalds free_page((unsigned long) page); 53571da177e4SLinus Torvalds } 53581da177e4SLinus Torvalds 5359f3eb5384SStefan Weinhuber 5360f3eb5384SStefan Weinhuber /* 5361f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5362f3eb5384SStefan Weinhuber */ 5363f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5364f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5365f3eb5384SStefan Weinhuber { 5366f3eb5384SStefan Weinhuber char *page; 5367f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5368f3eb5384SStefan Weinhuber struct tsb *tsb; 5369ef19298bSStefan Weinhuber u8 *sense, *rcq; 5370f3eb5384SStefan Weinhuber 5371f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5372f3eb5384SStefan Weinhuber if (page == NULL) { 5373fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5374f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5375f3eb5384SStefan Weinhuber return; 5376f3eb5384SStefan Weinhuber } 5377f3eb5384SStefan Weinhuber /* dump the sense data */ 5378773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5379f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5380f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5381773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5382a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5383a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5384a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5385a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5386a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5387a521b048SStefan Haberland irb->scsw.tm.fcxs, 5388a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5389a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5390773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5391f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5392f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5393f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5394f3eb5384SStefan Weinhuber 5395f3eb5384SStefan Weinhuber tsb = NULL; 5396f3eb5384SStefan Weinhuber sense = NULL; 5397a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5398f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5399f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5400f3eb5384SStefan Weinhuber 5401b8fde722SStefan Haberland if (tsb) { 5402773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5403f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5404773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5405f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5406773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5407f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5408773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5409f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5410f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5411773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5412f3eb5384SStefan Weinhuber " residual %d\n", residual); 5413f3eb5384SStefan Weinhuber 5414f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5415f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5416773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5417f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5418f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5419773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5420f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5421f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5422773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5423f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5424f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5425773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5426f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5427f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5428773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5429f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5430f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5431f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5432f3eb5384SStefan Weinhuber break; 5433f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5434773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5435f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5436ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5437773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5438ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5439ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5440ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5441f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5442f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5443ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5444f3eb5384SStefan Weinhuber } 5445f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5446f3eb5384SStefan Weinhuber } 5447f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5448f3eb5384SStefan Weinhuber break; 5449f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5450773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 54518693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5452f3eb5384SStefan Weinhuber break; 5453f3eb5384SStefan Weinhuber } 5454f3eb5384SStefan Weinhuber 5455f3eb5384SStefan Weinhuber if (sense) { 5456f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5457773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5458f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5459f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5460f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5461f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5462f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5463f3eb5384SStefan Weinhuber } 5464f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5465f3eb5384SStefan Weinhuber } 5466f3eb5384SStefan Weinhuber 5467f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5468f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5469773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5470f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5471f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5472f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5473f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5474f3eb5384SStefan Weinhuber } else { 5475f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5476773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5477f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5478f3eb5384SStefan Weinhuber "Exception class %x\n", 5479f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5480f3eb5384SStefan Weinhuber } 5481f3eb5384SStefan Weinhuber } else { 5482773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5483f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5484f3eb5384SStefan Weinhuber } 5485f3eb5384SStefan Weinhuber } else { 5486773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5487f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5488f3eb5384SStefan Weinhuber } 5489773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5490f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5491f3eb5384SStefan Weinhuber } 5492f3eb5384SStefan Weinhuber 5493f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5494f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5495f3eb5384SStefan Weinhuber { 54968fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 54978fd57520SJan Höppner 54988fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 54998fd57520SJan Höppner /* 55008fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 55018fd57520SJan Höppner * error might be expected and log messages shouldn't be written 55028fd57520SJan Höppner * then. Check if the according suppress bit is set. 55038fd57520SJan Höppner */ 55048fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 55058fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 55068fd57520SJan Höppner return; 55078fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 55088fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 55098fd57520SJan Höppner return; 55108fd57520SJan Höppner 5511f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 55128fd57520SJan Höppner } else { 55138fd57520SJan Höppner /* 5514ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5515ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5516ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 55178fd57520SJan Höppner */ 5518ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5519ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5520ab24fbd3SStefan Haberland return; 5521ab24fbd3SStefan Haberland 55228fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 55238fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 55248fd57520SJan Höppner return; 55258fd57520SJan Höppner 5526f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5527f3eb5384SStefan Weinhuber } 55288fd57520SJan Höppner } 5529f3eb5384SStefan Weinhuber 5530501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 5531d41dd122SStefan Haberland { 5532d41dd122SStefan Haberland /* 5533d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 5534d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 5535d41dd122SStefan Haberland * information like PAV support that might have changed 5536d41dd122SStefan Haberland */ 5537d41dd122SStefan Haberland dasd_alias_remove_device(device); 5538d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5539d41dd122SStefan Haberland 5540d41dd122SStefan Haberland return 0; 5541d41dd122SStefan Haberland } 5542d41dd122SStefan Haberland 5543501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 5544d41dd122SStefan Haberland { 5545543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55466fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 5547f9f8d02fSStefan Haberland int rc; 5548d41dd122SStefan Haberland struct dasd_uid temp_uid; 5549a7602f6cSStefan Haberland unsigned long flags; 5550ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 5551d41dd122SStefan Haberland 5552d41dd122SStefan Haberland /* Read Configuration Data */ 5553251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5554251afd69SStefan Haberland if (rc) { 5555251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5556251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5557251afd69SStefan Haberland goto out_err; 5558251afd69SStefan Haberland } 5559d41dd122SStefan Haberland 55602dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 55612dedf0d9SStefan Haberland /* Generate device unique id */ 55622dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 55632dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5564d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 5565a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 5566a7602f6cSStefan Haberland "changed\n"); 55672dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5568d41dd122SStefan Haberland if (rc) 5569d41dd122SStefan Haberland goto out_err; 5570d41dd122SStefan Haberland 5571d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 5572f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 5573f9f8d02fSStefan Haberland if (rc) 5574251afd69SStefan Haberland goto out_err; 5575ea4da6eaSStefan Haberland 5576ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 5577ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 5578f4ac1d02SStefan Weinhuber 5579f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 5580251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5581251afd69SStefan Haberland if (rc) { 5582251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5583251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5584251afd69SStefan Haberland goto out_err2; 5585251afd69SStefan Haberland } 5586d41dd122SStefan Haberland 5587d41dd122SStefan Haberland /* Read Feature Codes */ 558868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 5589d41dd122SStefan Haberland 5590c729696bSJan Höppner /* Read Volume Information */ 5591c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 5592c729696bSJan Höppner if (rc) 5593c729696bSJan Höppner goto out_err2; 5594c729696bSJan Höppner 5595c729696bSJan Höppner /* Read Extent Pool Information */ 5596c729696bSJan Höppner rc = dasd_eckd_read_ext_pool_info(device); 5597c729696bSJan Höppner if (rc) 5598c729696bSJan Höppner goto out_err2; 5599c729696bSJan Höppner 5600d41dd122SStefan Haberland /* Read Device Characteristics */ 560168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 56026fca97a9SStefan Haberland &temp_rdc_data, 64); 5603d41dd122SStefan Haberland if (rc) { 5604b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5605b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 5606251afd69SStefan Haberland goto out_err2; 5607d41dd122SStefan Haberland } 5608a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 56096fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5610a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5611d41dd122SStefan Haberland 5612d41dd122SStefan Haberland /* add device to alias management */ 5613d41dd122SStefan Haberland dasd_alias_add_device(device); 5614d41dd122SStefan Haberland 5615d41dd122SStefan Haberland return 0; 5616d41dd122SStefan Haberland 5617251afd69SStefan Haberland out_err2: 5618251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5619d41dd122SStefan Haberland out_err: 5620e6125fbaSStefan Haberland return -1; 5621d41dd122SStefan Haberland } 5622d41dd122SStefan Haberland 5623501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5624501183f2SStefan Haberland { 5625543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5626501183f2SStefan Haberland int rc, old_base; 56272dedf0d9SStefan Haberland char print_uid[60]; 56282dedf0d9SStefan Haberland struct dasd_uid uid; 56292dedf0d9SStefan Haberland unsigned long flags; 5630501183f2SStefan Haberland 563159a9ed5fSStefan Haberland /* 563259a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 563359a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 563459a9ed5fSStefan Haberland */ 563559a9ed5fSStefan Haberland dasd_alias_remove_device(device); 563659a9ed5fSStefan Haberland 56372dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5638501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 56392dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 56402dedf0d9SStefan Haberland 5641501183f2SStefan Haberland /* Read Configuration Data */ 5642501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5643501183f2SStefan Haberland if (rc) 5644501183f2SStefan Haberland goto out_err; 5645501183f2SStefan Haberland 56462dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5647501183f2SStefan Haberland if (rc) 5648501183f2SStefan Haberland goto out_err; 5649501183f2SStefan Haberland /* 5650501183f2SStefan Haberland * update unit address configuration and 5651501183f2SStefan Haberland * add device to alias management 5652501183f2SStefan Haberland */ 5653501183f2SStefan Haberland dasd_alias_update_add_device(device); 5654501183f2SStefan Haberland 56552dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 56562dedf0d9SStefan Haberland 56572dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 56582dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 56592dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 56602dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 56612dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5662501183f2SStefan Haberland else 56632dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 56642dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 56652dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5666501183f2SStefan Haberland 5667501183f2SStefan Haberland dev_info(&device->cdev->dev, 5668501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 56692dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5670501183f2SStefan Haberland } 5671501183f2SStefan Haberland return 0; 5672501183f2SStefan Haberland 5673501183f2SStefan Haberland out_err: 5674501183f2SStefan Haberland return -1; 5675501183f2SStefan Haberland } 5676501183f2SStefan Haberland 56775db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 56785db8440cSStefan Haberland struct dasd_rssd_messages *messages, 56795db8440cSStefan Haberland __u8 lpum) 56805db8440cSStefan Haberland { 56815db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 56825db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 56835db8440cSStefan Haberland struct dasd_ccw_req *cqr; 56845db8440cSStefan Haberland struct ccw1 *ccw; 56855db8440cSStefan Haberland int rc; 56865db8440cSStefan Haberland 56875db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 56885db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 56895db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5690c5205f2fSSebastian Ott device, NULL); 56915db8440cSStefan Haberland if (IS_ERR(cqr)) { 56925db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 56935db8440cSStefan Haberland "Could not allocate read message buffer request"); 56945db8440cSStefan Haberland return PTR_ERR(cqr); 56955db8440cSStefan Haberland } 56965db8440cSStefan Haberland 5697af775210SStefan Haberland cqr->lpm = lpum; 5698af775210SStefan Haberland retry: 56995db8440cSStefan Haberland cqr->startdev = device; 57005db8440cSStefan Haberland cqr->memdev = device; 57015db8440cSStefan Haberland cqr->block = NULL; 57025db8440cSStefan Haberland cqr->expires = 10 * HZ; 57035db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5704b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5705b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5706b179b037SStefan Haberland * do basic erp */ 5707b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5708b179b037SStefan Haberland cqr->retries = 256; 57095db8440cSStefan Haberland 57105db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 57115db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 57125db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 57135db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 57145db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 57155db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 57165db8440cSStefan Haberland 57175db8440cSStefan Haberland ccw = cqr->cpaddr; 57185db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 57195db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 57205db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 57215db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 57225db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 57235db8440cSStefan Haberland 57245db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 57255db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 57265db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 57275db8440cSStefan Haberland 57285db8440cSStefan Haberland ccw++; 57295db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 57305db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 57315db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 57325db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 57335db8440cSStefan Haberland 57345db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 57355db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 57365db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 57375db8440cSStefan Haberland if (rc == 0) { 57385db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 57395db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 57405db8440cSStefan Haberland (prssdp + 1); 57415db8440cSStefan Haberland memcpy(messages, message_buf, 57425db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5743af775210SStefan Haberland } else if (cqr->lpm) { 5744af775210SStefan Haberland /* 5745af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5746af775210SStefan Haberland * but instead we get the required information on any path 5747af775210SStefan Haberland * so retry with open path mask 5748af775210SStefan Haberland */ 5749af775210SStefan Haberland cqr->lpm = 0; 5750af775210SStefan Haberland goto retry; 57515db8440cSStefan Haberland } else 57525db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 57535db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 57545db8440cSStefan Haberland , rc); 57555db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 57565db8440cSStefan Haberland return rc; 57575db8440cSStefan Haberland } 57585db8440cSStefan Haberland 57595a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 57605a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 57615a3b7b11SStefan Haberland { 57625a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 57635a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 57645a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 57655a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 57665a3b7b11SStefan Haberland struct ccw1 *ccw; 57675a3b7b11SStefan Haberland int rc; 57685a3b7b11SStefan Haberland 57695a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 57705a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 57715a3b7b11SStefan Haberland return -EOPNOTSUPP; 57725a3b7b11SStefan Haberland 5773ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5774ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5775ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5776ccd53fa2SStefan Haberland 57775a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 57785a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5779c5205f2fSSebastian Ott device, NULL); 57805a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 57815a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 57825a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 57835a3b7b11SStefan Haberland return PTR_ERR(cqr); 57845a3b7b11SStefan Haberland } 57855a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 57865a3b7b11SStefan Haberland if (!host_access) { 57875a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 57885a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 57895a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 57905a3b7b11SStefan Haberland return -ENOMEM; 57915a3b7b11SStefan Haberland } 57925a3b7b11SStefan Haberland cqr->startdev = device; 57935a3b7b11SStefan Haberland cqr->memdev = device; 57945a3b7b11SStefan Haberland cqr->block = NULL; 57955a3b7b11SStefan Haberland cqr->retries = 256; 57965a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 57975a3b7b11SStefan Haberland 57985a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 57995a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58005a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 58015a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 58025a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 58035a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 58045a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 58055a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 58065a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 58075a3b7b11SStefan Haberland 58085a3b7b11SStefan Haberland ccw = cqr->cpaddr; 58095a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 58105a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 58115a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 58125a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58135a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 58145a3b7b11SStefan Haberland 58155a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 58165a3b7b11SStefan Haberland ccw++; 58175a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 58185a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 58195a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58205a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 58215a3b7b11SStefan Haberland 58225a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 58235a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5824ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5825ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5826f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 58275a3b7b11SStefan Haberland if (rc == 0) { 58285a3b7b11SStefan Haberland *data = *host_access; 58295a3b7b11SStefan Haberland } else { 58305a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 58315a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 58325a3b7b11SStefan Haberland rc); 58335a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 58345a3b7b11SStefan Haberland } 58355a3b7b11SStefan Haberland 58365a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 58375a3b7b11SStefan Haberland kfree(host_access); 58385a3b7b11SStefan Haberland return rc; 58395a3b7b11SStefan Haberland } 58405a3b7b11SStefan Haberland /* 58415a3b7b11SStefan Haberland * return number of grouped devices 58425a3b7b11SStefan Haberland */ 58435a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 58445a3b7b11SStefan Haberland { 58455a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 58465a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 58475a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 58485a3b7b11SStefan Haberland int count = 0; 58495a3b7b11SStefan Haberland int rc, i; 58505a3b7b11SStefan Haberland 58515a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 58525a3b7b11SStefan Haberland if (!access) { 58535a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58545a3b7b11SStefan Haberland "Could not allocate access buffer"); 58555a3b7b11SStefan Haberland return -ENOMEM; 58565a3b7b11SStefan Haberland } 58575a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 58585a3b7b11SStefan Haberland if (rc) { 58595a3b7b11SStefan Haberland kfree(access); 58605a3b7b11SStefan Haberland return rc; 58615a3b7b11SStefan Haberland } 58625a3b7b11SStefan Haberland 58635a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 58645a3b7b11SStefan Haberland access->host_access_information; 58655a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 58665a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 58675a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 58685a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 58695a3b7b11SStefan Haberland count++; 58705a3b7b11SStefan Haberland } 58715a3b7b11SStefan Haberland 58725a3b7b11SStefan Haberland kfree(access); 58735a3b7b11SStefan Haberland return count; 58745a3b7b11SStefan Haberland } 58755a3b7b11SStefan Haberland 58765a3b7b11SStefan Haberland /* 58775a3b7b11SStefan Haberland * write host access information to a sequential file 58785a3b7b11SStefan Haberland */ 58795a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 58805a3b7b11SStefan Haberland { 58815a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 58825a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 58835a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 58845a3b7b11SStefan Haberland char sysplex[9] = ""; 5885c7848e14SChristophe JAILLET int rc, i; 58865a3b7b11SStefan Haberland 58875a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 58885a3b7b11SStefan Haberland if (!access) { 58895a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58905a3b7b11SStefan Haberland "Could not allocate access buffer"); 58915a3b7b11SStefan Haberland return -ENOMEM; 58925a3b7b11SStefan Haberland } 58935a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 58945a3b7b11SStefan Haberland if (rc) { 58955a3b7b11SStefan Haberland kfree(access); 58965a3b7b11SStefan Haberland return rc; 58975a3b7b11SStefan Haberland } 58985a3b7b11SStefan Haberland 58995a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 59005a3b7b11SStefan Haberland access->host_access_information; 59015a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 59025a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 59035a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 59045a3b7b11SStefan Haberland /* PGID */ 5905c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 59065a3b7b11SStefan Haberland /* FLAGS */ 59075a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 59085a3b7b11SStefan Haberland /* SYSPLEX NAME */ 59095a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 59105a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 59115a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 59125a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 59135a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 59145a3b7b11SStefan Haberland /* TIMESTAMP */ 59155a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 59165a3b7b11SStefan Haberland entry->timestamp); 59175a3b7b11SStefan Haberland } 59185a3b7b11SStefan Haberland kfree(access); 59195a3b7b11SStefan Haberland 59205a3b7b11SStefan Haberland return 0; 59215a3b7b11SStefan Haberland } 59225a3b7b11SStefan Haberland 59235db8440cSStefan Haberland /* 59245db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 59255db8440cSStefan Haberland */ 59265db8440cSStefan Haberland static int 59275db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5928a521b048SStefan Haberland __u32 message_id, __u8 lpum) 59295db8440cSStefan Haberland { 59305db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 5931a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 59325db8440cSStefan Haberland struct dasd_ccw_req *cqr; 59335db8440cSStefan Haberland struct ccw1 *ccw; 59345db8440cSStefan Haberland int rc; 59355db8440cSStefan Haberland 59365db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 59375db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 5938c5205f2fSSebastian Ott device, NULL); 59395db8440cSStefan Haberland 59405db8440cSStefan Haberland if (IS_ERR(cqr)) { 59415db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 59425db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 59435db8440cSStefan Haberland return PTR_ERR(cqr); 59445db8440cSStefan Haberland } 59455db8440cSStefan Haberland 59465db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 59475db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 59485db8440cSStefan Haberland psf_cuir->cc = response; 5949a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 59505db8440cSStefan Haberland psf_cuir->message_id = message_id; 5951a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 5952a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 59535db8440cSStefan Haberland ccw = cqr->cpaddr; 59545db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59555db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5956b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 59575db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 59585db8440cSStefan Haberland 59595db8440cSStefan Haberland cqr->startdev = device; 59605db8440cSStefan Haberland cqr->memdev = device; 59615db8440cSStefan Haberland cqr->block = NULL; 59625db8440cSStefan Haberland cqr->retries = 256; 59635db8440cSStefan Haberland cqr->expires = 10*HZ; 59645db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 59655db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 5966b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 59675db8440cSStefan Haberland 59685db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 59695db8440cSStefan Haberland 59705db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59715db8440cSStefan Haberland return rc; 59725db8440cSStefan Haberland } 59735db8440cSStefan Haberland 5974b179b037SStefan Haberland /* 5975b179b037SStefan Haberland * return configuration data that is referenced by record selector 5976b179b037SStefan Haberland * if a record selector is specified or per default return the 5977b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 5978b179b037SStefan Haberland */ 5979b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5980b179b037SStefan Haberland __u8 lpum, 5981b179b037SStefan Haberland struct dasd_cuir_message *cuir) 59825db8440cSStefan Haberland { 5983b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5984b179b037SStefan Haberland int path, pos; 59855db8440cSStefan Haberland 5986b179b037SStefan Haberland if (cuir->record_selector == 0) 5987b179b037SStefan Haberland goto out; 5988b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5989c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 5990b179b037SStefan Haberland if (conf_data->gneq.record_selector == 5991b179b037SStefan Haberland cuir->record_selector) 5992b179b037SStefan Haberland return conf_data; 59935db8440cSStefan Haberland } 5994b179b037SStefan Haberland out: 5995c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 59965db8440cSStefan Haberland } 59975db8440cSStefan Haberland 59985db8440cSStefan Haberland /* 5999b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6000b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6001b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6002b179b037SStefan Haberland * 6003b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6004b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6005b179b037SStefan Haberland * on. 6006b179b037SStefan Haberland */ 6007b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6008b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6009b179b037SStefan Haberland { 6010b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6011b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6012b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6013b179b037SStefan Haberland unsigned int pos, path; 6014b179b037SStefan Haberland char *ref_gneq, *gneq; 6015b179b037SStefan Haberland char *ref_ned, *ned; 6016b179b037SStefan Haberland int tbcpm = 0; 6017b179b037SStefan Haberland 6018b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6019b179b037SStefan Haberland the attention message was presented on */ 6020b179b037SStefan Haberland if (!cuir->ned_map || 6021b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6022b179b037SStefan Haberland return lpum; 6023b179b037SStefan Haberland 6024b179b037SStefan Haberland /* get reference conf data */ 6025b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6026b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6027b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6028b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6029b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6030b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6031b179b037SStefan Haberland mask = cuir->neq_map[2]; 6032b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6033b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6034b179b037SStefan Haberland 6035c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6036b179b037SStefan Haberland /* initialise data per path */ 6037b179b037SStefan Haberland bitmask = mask; 6038c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6039b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6040b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6041b179b037SStefan Haberland /* compare reference ned and per path ned */ 6042b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6043b179b037SStefan Haberland continue; 6044b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6045b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6046b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6047b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6048b179b037SStefan Haberland while (bitmask) { 6049b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6050b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6051b179b037SStefan Haberland != 0) 6052b179b037SStefan Haberland break; 6053b179b037SStefan Haberland clear_bit(pos, &bitmask); 6054b179b037SStefan Haberland } 6055b179b037SStefan Haberland if (bitmask) 6056b179b037SStefan Haberland continue; 6057b179b037SStefan Haberland /* device and path match the reference values 6058b179b037SStefan Haberland add path to CUIR scope */ 6059c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6060b179b037SStefan Haberland } 6061b179b037SStefan Haberland return tbcpm; 6062b179b037SStefan Haberland } 6063b179b037SStefan Haberland 6064b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6065a521b048SStefan Haberland unsigned long paths, int action) 6066b179b037SStefan Haberland { 6067b179b037SStefan Haberland int pos; 6068b179b037SStefan Haberland 6069b179b037SStefan Haberland while (paths) { 6070b179b037SStefan Haberland /* get position of bit in mask */ 6071a521b048SStefan Haberland pos = 8 - ffs(paths); 6072b179b037SStefan Haberland /* get channel path descriptor from this position */ 6073b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6074a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6075a521b048SStefan Haberland device->path[pos].cssid, 6076a521b048SStefan Haberland device->path[pos].chpid); 6077b179b037SStefan Haberland else if (action == CUIR_RESUME) 6078a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6079a521b048SStefan Haberland device->path[pos].cssid, 6080a521b048SStefan Haberland device->path[pos].chpid); 6081a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6082b179b037SStefan Haberland } 6083b179b037SStefan Haberland } 6084b179b037SStefan Haberland 6085b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6086b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6087b179b037SStefan Haberland { 6088b179b037SStefan Haberland unsigned long tbcpm; 6089b179b037SStefan Haberland 6090b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6091b179b037SStefan Haberland /* nothing to do if path is not in use */ 6092c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6093b179b037SStefan Haberland return 0; 6094c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6095b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6096b179b037SStefan Haberland return error */ 6097b179b037SStefan Haberland return -EINVAL; 6098b179b037SStefan Haberland } 6099b179b037SStefan Haberland /* remove device from operational path mask */ 6100c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6101c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6102b179b037SStefan Haberland return tbcpm; 6103b179b037SStefan Haberland } 6104b179b037SStefan Haberland 6105b179b037SStefan Haberland /* 6106b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6107b179b037SStefan Haberland * return an error if the last path to a device would be removed 61085db8440cSStefan Haberland * 61095db8440cSStefan Haberland * if only part of the devices are quiesced and an error 61105db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 61115db8440cSStefan Haberland * notify the already set offline devices again 61125db8440cSStefan Haberland */ 61135db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6114b179b037SStefan Haberland struct dasd_cuir_message *cuir) 61155db8440cSStefan Haberland { 6116543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 61175db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 61185db8440cSStefan Haberland struct dasd_device *dev, *n; 6119b179b037SStefan Haberland unsigned long paths = 0; 6120b179b037SStefan Haberland unsigned long flags; 6121b179b037SStefan Haberland int tbcpm; 61225db8440cSStefan Haberland 61235db8440cSStefan Haberland /* active devices */ 6124b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 61255db8440cSStefan Haberland alias_list) { 6126b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6127b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6128b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6129b179b037SStefan Haberland if (tbcpm < 0) 6130b179b037SStefan Haberland goto out_err; 6131b179b037SStefan Haberland paths |= tbcpm; 61325db8440cSStefan Haberland } 61335db8440cSStefan Haberland /* inactive devices */ 6134b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 61355db8440cSStefan Haberland alias_list) { 6136b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6137b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6138b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6139b179b037SStefan Haberland if (tbcpm < 0) 6140b179b037SStefan Haberland goto out_err; 6141b179b037SStefan Haberland paths |= tbcpm; 61425db8440cSStefan Haberland } 61435db8440cSStefan Haberland /* devices in PAV groups */ 61445db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 61455db8440cSStefan Haberland &private->lcu->grouplist, group) { 61465db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 61475db8440cSStefan Haberland alias_list) { 6148b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6149b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6150b179b037SStefan Haberland spin_unlock_irqrestore( 6151b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6152b179b037SStefan Haberland if (tbcpm < 0) 6153b179b037SStefan Haberland goto out_err; 6154b179b037SStefan Haberland paths |= tbcpm; 61555db8440cSStefan Haberland } 61565db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 61575db8440cSStefan Haberland alias_list) { 6158b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6159b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6160b179b037SStefan Haberland spin_unlock_irqrestore( 6161b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6162b179b037SStefan Haberland if (tbcpm < 0) 6163b179b037SStefan Haberland goto out_err; 6164b179b037SStefan Haberland paths |= tbcpm; 61655db8440cSStefan Haberland } 61665db8440cSStefan Haberland } 6167b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6168a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6169b179b037SStefan Haberland return 0; 6170b179b037SStefan Haberland out_err: 6171b179b037SStefan Haberland return tbcpm; 61725db8440cSStefan Haberland } 61735db8440cSStefan Haberland 61745db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6175b179b037SStefan Haberland struct dasd_cuir_message *cuir) 61765db8440cSStefan Haberland { 6177543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 61785db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 61795db8440cSStefan Haberland struct dasd_device *dev, *n; 6180b179b037SStefan Haberland unsigned long paths = 0; 6181b179b037SStefan Haberland int tbcpm; 61825db8440cSStefan Haberland 61835db8440cSStefan Haberland /* 61845db8440cSStefan Haberland * the path may have been added through a generic path event before 61855db8440cSStefan Haberland * only trigger path verification if the path is not already in use 61865db8440cSStefan Haberland */ 61875db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 61885db8440cSStefan Haberland &private->lcu->active_devices, 61895db8440cSStefan Haberland alias_list) { 6190b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6191b179b037SStefan Haberland paths |= tbcpm; 6192c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6193c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 61945db8440cSStefan Haberland dasd_schedule_device_bh(dev); 61955db8440cSStefan Haberland } 61965db8440cSStefan Haberland } 61975db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 61985db8440cSStefan Haberland &private->lcu->inactive_devices, 61995db8440cSStefan Haberland alias_list) { 6200b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6201b179b037SStefan Haberland paths |= tbcpm; 6202c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6203c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62045db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62055db8440cSStefan Haberland } 62065db8440cSStefan Haberland } 62075db8440cSStefan Haberland /* devices in PAV groups */ 62085db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 62095db8440cSStefan Haberland &private->lcu->grouplist, 62105db8440cSStefan Haberland group) { 62115db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62125db8440cSStefan Haberland &pavgroup->baselist, 62135db8440cSStefan Haberland alias_list) { 6214b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6215b179b037SStefan Haberland paths |= tbcpm; 6216c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6217c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62185db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62195db8440cSStefan Haberland } 62205db8440cSStefan Haberland } 62215db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62225db8440cSStefan Haberland &pavgroup->aliaslist, 62235db8440cSStefan Haberland alias_list) { 6224b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6225b179b037SStefan Haberland paths |= tbcpm; 6226c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6227c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62285db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62295db8440cSStefan Haberland } 62305db8440cSStefan Haberland } 62315db8440cSStefan Haberland } 6232b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6233a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6234b179b037SStefan Haberland return 0; 62355db8440cSStefan Haberland } 62365db8440cSStefan Haberland 62375db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 62385db8440cSStefan Haberland __u8 lpum) 62395db8440cSStefan Haberland { 62405db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6241a521b048SStefan Haberland int response; 62425db8440cSStefan Haberland 6243b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6244b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6245b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6246b179b037SStefan Haberland ((u32 *)cuir)[3]); 62475db8440cSStefan Haberland 62485db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 62495db8440cSStefan Haberland /* quiesce */ 6250a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6251b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6252b179b037SStefan Haberland else 6253b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 62545db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 62555db8440cSStefan Haberland /* resume */ 6256a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6257b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 62585db8440cSStefan Haberland } else 62595db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 62605db8440cSStefan Haberland 6261b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6262a521b048SStefan Haberland cuir->message_id, lpum); 6263b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6264b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6265b179b037SStefan Haberland cuir->message_id); 6266b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6267b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 62685db8440cSStefan Haberland } 62695db8440cSStefan Haberland 62705db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 62715db8440cSStefan Haberland { 62725db8440cSStefan Haberland struct check_attention_work_data *data; 62735db8440cSStefan Haberland struct dasd_rssd_messages *messages; 62745db8440cSStefan Haberland struct dasd_device *device; 62755db8440cSStefan Haberland int rc; 62765db8440cSStefan Haberland 62775db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 62785db8440cSStefan Haberland device = data->device; 62795db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 62805db8440cSStefan Haberland if (!messages) { 62815db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 62825db8440cSStefan Haberland "Could not allocate attention message buffer"); 62835db8440cSStefan Haberland goto out; 62845db8440cSStefan Haberland } 62855db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 62865db8440cSStefan Haberland if (rc) 62875db8440cSStefan Haberland goto out; 62885db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 62895db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 62905db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 62915db8440cSStefan Haberland out: 62925db8440cSStefan Haberland dasd_put_device(device); 62935db8440cSStefan Haberland kfree(messages); 62945db8440cSStefan Haberland kfree(data); 62955db8440cSStefan Haberland } 62965db8440cSStefan Haberland 62975db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 62985db8440cSStefan Haberland { 62995db8440cSStefan Haberland struct check_attention_work_data *data; 63005db8440cSStefan Haberland 63015db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 63025db8440cSStefan Haberland if (!data) 63035db8440cSStefan Haberland return -ENOMEM; 63045db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 63055db8440cSStefan Haberland dasd_get_device(device); 63065db8440cSStefan Haberland data->device = device; 63075db8440cSStefan Haberland data->lpum = lpum; 63085db8440cSStefan Haberland schedule_work(&data->worker); 63095db8440cSStefan Haberland return 0; 63105db8440cSStefan Haberland } 63115db8440cSStefan Haberland 6312a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6313a521b048SStefan Haberland { 6314a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6315a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6316a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6317a521b048SStefan Haberland dev_err(&device->cdev->dev, 6318a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6319a521b048SStefan Haberland lpum); 6320a521b048SStefan Haberland return 1; 6321a521b048SStefan Haberland } 6322a521b048SStefan Haberland return 0; 6323a521b048SStefan Haberland } 6324a521b048SStefan Haberland 6325a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6326a521b048SStefan Haberland { 6327a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6328a521b048SStefan Haberland 6329a521b048SStefan Haberland dev_err(&device->cdev->dev, 6330a521b048SStefan Haberland "High Performance FICON disabled\n"); 6331a521b048SStefan Haberland private->fcx_max_data = 0; 6332a521b048SStefan Haberland } 6333a521b048SStefan Haberland 6334a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6335a521b048SStefan Haberland { 6336a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6337a521b048SStefan Haberland 6338a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6339a521b048SStefan Haberland } 6340a521b048SStefan Haberland 6341a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6342a521b048SStefan Haberland struct irb *irb) 6343a521b048SStefan Haberland { 6344a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6345a521b048SStefan Haberland 6346a521b048SStefan Haberland if (!private->fcx_max_data) { 6347a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6348a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6349a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6350a521b048SStefan Haberland return; 6351a521b048SStefan Haberland } 6352a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6353a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6354a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6355a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6356a521b048SStefan Haberland return; 6357a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6358a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6359a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6360a521b048SStefan Haberland } 6361a521b048SStefan Haberland /* 6362a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6363a521b048SStefan Haberland * requeue of existing requests 6364a521b048SStefan Haberland */ 6365a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6366a521b048SStefan Haberland dasd_schedule_requeue(device); 6367a521b048SStefan Haberland } 6368a521b048SStefan Haberland 6369a0610a8aSJan Höppner /* 6370a0610a8aSJan Höppner * Initialize block layer request queue. 6371a0610a8aSJan Höppner */ 6372a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6373a0610a8aSJan Höppner { 6374a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6375a0610a8aSJan Höppner struct request_queue *q = block->request_queue; 6376a0610a8aSJan Höppner struct dasd_device *device = block->base; 63777e64db15SJan Höppner struct dasd_eckd_private *private; 63787e64db15SJan Höppner unsigned int max_discard_sectors; 63797e64db15SJan Höppner unsigned int max_bytes; 63807e64db15SJan Höppner unsigned int ext_bytes; /* Extent Size in Bytes */ 63817e64db15SJan Höppner int recs_per_trk; 63827e64db15SJan Höppner int trks_per_cyl; 63837e64db15SJan Höppner int ext_limit; 63847e64db15SJan Höppner int ext_size; /* Extent Size in Cylinders */ 6385a0610a8aSJan Höppner int max; 6386a0610a8aSJan Höppner 63877e64db15SJan Höppner private = device->private; 63887e64db15SJan Höppner trks_per_cyl = private->rdc_data.trk_per_cyl; 63897e64db15SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, logical_block_size); 63907e64db15SJan Höppner 6391a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6392a0610a8aSJan Höppner /* 6393a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6394a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6395a0610a8aSJan Höppner * only need one ccw per track 6396a0610a8aSJan Höppner * so the max_hw_sectors are 6397a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6398a0610a8aSJan Höppner */ 6399a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6400a0610a8aSJan Höppner } else { 6401a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6402a0610a8aSJan Höppner } 6403a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6404a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6405a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6406a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6407a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6408a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6409a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6410a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 64117e64db15SJan Höppner 64127e64db15SJan Höppner if (dasd_eckd_is_ese(device)) { 64137e64db15SJan Höppner /* 64147e64db15SJan Höppner * Depending on the extent size, up to UINT_MAX bytes can be 64157e64db15SJan Höppner * accepted. However, neither DASD_ECKD_RAS_EXTS_MAX nor the 64167e64db15SJan Höppner * device limits should be exceeded. 64177e64db15SJan Höppner */ 64187e64db15SJan Höppner ext_size = dasd_eckd_ext_size(device); 64197e64db15SJan Höppner ext_limit = min(private->real_cyl / ext_size, DASD_ECKD_RAS_EXTS_MAX); 64207e64db15SJan Höppner ext_bytes = ext_size * trks_per_cyl * recs_per_trk * 64217e64db15SJan Höppner logical_block_size; 64227e64db15SJan Höppner max_bytes = UINT_MAX - (UINT_MAX % ext_bytes); 64237e64db15SJan Höppner if (max_bytes / ext_bytes > ext_limit) 64247e64db15SJan Höppner max_bytes = ext_bytes * ext_limit; 64257e64db15SJan Höppner 64267e64db15SJan Höppner max_discard_sectors = max_bytes / 512; 64277e64db15SJan Höppner 64287e64db15SJan Höppner blk_queue_max_discard_sectors(q, max_discard_sectors); 64297e64db15SJan Höppner blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); 64307e64db15SJan Höppner q->limits.discard_granularity = ext_bytes; 64317e64db15SJan Höppner q->limits.discard_alignment = ext_bytes; 64327e64db15SJan Höppner } 6433a0610a8aSJan Höppner } 6434a0610a8aSJan Höppner 6435d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 64363bda058bSSebastian Ott .driver = { 6437d41dd122SStefan Haberland .name = "dasd-eckd", 6438d41dd122SStefan Haberland .owner = THIS_MODULE, 64393bda058bSSebastian Ott }, 6440d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6441d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6442d41dd122SStefan Haberland .remove = dasd_generic_remove, 6443d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6444d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6445d41dd122SStefan Haberland .notify = dasd_generic_notify, 6446a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 64474679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6448d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 6449d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 6450d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 6451a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6452420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6453d41dd122SStefan Haberland }; 6454f3eb5384SStefan Weinhuber 64551da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 64561da177e4SLinus Torvalds .owner = THIS_MODULE, 64571da177e4SLinus Torvalds .name = "ECKD", 64581da177e4SLinus Torvalds .ebcname = "ECKD", 64591da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 64608e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 64611da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6462a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 6463d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 64648e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6465daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6466a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 64671da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 64681da177e4SLinus Torvalds .start_IO = dasd_start_IO, 64691da177e4SLinus Torvalds .term_IO = dasd_term_IO, 64708e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 64711da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 64728fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 64731da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 64741da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 64755a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 64768e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 64778e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 64781da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6479fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 64801da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 64811107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6482d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 6483d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 6484501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 64852dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6486f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 64875db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 64885a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 64895a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6490a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6491a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6492a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6493a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6494c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6495c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6496c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6497c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 649891dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6499c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6500c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6501c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6502c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6503c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 65045e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 65055e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 65061da177e4SLinus Torvalds }; 65071da177e4SLinus Torvalds 65081da177e4SLinus Torvalds static int __init 65091da177e4SLinus Torvalds dasd_eckd_init(void) 65101da177e4SLinus Torvalds { 6511736e6ea0SSebastian Ott int ret; 6512736e6ea0SSebastian Ott 65131da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6514f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6515f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6516f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6517f932bceaSStefan Weinhuber return -ENOMEM; 6518a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 6519a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6520a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 6521a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 6522a4d26c6aSStefan Weinhuber return -ENOMEM; 6523a4d26c6aSStefan Weinhuber } 6524558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6525558b9ef0SStefan Weinhuber if (!rawpadpage) { 6526558b9ef0SStefan Weinhuber kfree(path_verification_worker); 6527558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 6528558b9ef0SStefan Weinhuber return -ENOMEM; 6529558b9ef0SStefan Weinhuber } 6530736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6531736e6ea0SSebastian Ott if (!ret) 6532736e6ea0SSebastian Ott wait_for_device_probe(); 6533a4d26c6aSStefan Weinhuber else { 6534a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6535f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6536558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6537a4d26c6aSStefan Weinhuber } 6538736e6ea0SSebastian Ott return ret; 65391da177e4SLinus Torvalds } 65401da177e4SLinus Torvalds 65411da177e4SLinus Torvalds static void __exit 65421da177e4SLinus Torvalds dasd_eckd_cleanup(void) 65431da177e4SLinus Torvalds { 65441da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6545a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6546f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6547558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 65481da177e4SLinus Torvalds } 65491da177e4SLinus Torvalds 65501da177e4SLinus Torvalds module_init(dasd_eckd_init); 65511da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6552