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> 24*b378a982SHeiko Carstens #include <linux/uaccess.h> 25*b378a982SHeiko Carstens #include <linux/io.h> 261da177e4SLinus Torvalds 27382b7366SSebastian Ott #include <asm/css_chars.h> 281da177e4SLinus Torvalds #include <asm/debug.h> 291da177e4SLinus Torvalds #include <asm/idals.h> 301da177e4SLinus Torvalds #include <asm/ebcdic.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 929e12e54cSJan Höppner static struct { 939e12e54cSJan Höppner struct dasd_ccw_req cqr; 949e12e54cSJan Höppner struct ccw1 ccw[2]; 959e12e54cSJan Höppner char data[40]; 969e12e54cSJan Höppner } *dasd_vol_info_req; 979e12e54cSJan Höppner static DEFINE_MUTEX(dasd_vol_info_mutex); 989e12e54cSJan Höppner 999e12e54cSJan Höppner struct ext_pool_exhaust_work_data { 1009e12e54cSJan Höppner struct work_struct worker; 1019e12e54cSJan Höppner struct dasd_device *device; 1029e12e54cSJan Höppner struct dasd_device *base; 1039e12e54cSJan Höppner }; 1049e12e54cSJan Höppner 105a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 106b7294932SJan Höppner struct pe_handler_work_data { 107a4d26c6aSStefan Weinhuber struct work_struct worker; 108a4d26c6aSStefan Weinhuber struct dasd_device *device; 109a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 110a4d26c6aSStefan Weinhuber struct ccw1 ccw; 111a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112a4d26c6aSStefan Weinhuber int isglobal; 113a4d26c6aSStefan Weinhuber __u8 tbvpm; 1144d063e64SJan Höppner __u8 fcsecpm; 115a4d26c6aSStefan Weinhuber }; 116b7294932SJan Höppner static struct pe_handler_work_data *pe_handler_worker; 117b7294932SJan Höppner static DEFINE_MUTEX(dasd_pe_handler_mutex); 118eb6e199bSStefan Weinhuber 1195db8440cSStefan Haberland struct check_attention_work_data { 1205db8440cSStefan Haberland struct work_struct worker; 1215db8440cSStefan Haberland struct dasd_device *device; 1225db8440cSStefan Haberland __u8 lpum; 1235db8440cSStefan Haberland }; 1245db8440cSStefan Haberland 125c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *); 1268fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1278fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1288fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1298fd57520SJan Höppner unsigned int, unsigned int); 130c99bff34SStefan Haberland static int dasd_eckd_query_pprc_status(struct dasd_device *, 131c99bff34SStefan Haberland struct dasd_pprc_data_sc4 *); 1328fd57520SJan Höppner 1331da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1341da177e4SLinus Torvalds * the other detection code is gone */ 1351da177e4SLinus Torvalds static int 1361da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds int ret; 1391da177e4SLinus Torvalds 14040545573SHorst Hummel /* set ECKD specific ccw-device options */ 141454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 142454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 14340545573SHorst Hummel if (ret) { 144b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 145b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 146b8ed5dd5SStefan Haberland "ccw-device options"); 1471da177e4SLinus Torvalds return ret; 14840545573SHorst Hummel } 149e03c5941SJan Höppner ret = dasd_generic_probe(cdev); 15040545573SHorst Hummel return ret; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds static int 1541da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1551da177e4SLinus Torvalds { 1561da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1601da177e4SLinus Torvalds #define LABEL_SIZE 140 1611da177e4SLinus Torvalds 1623bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 163ce6915f5SJan Höppner static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 1643bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1653bc9fef9SStefan Haberland 1661da177e4SLinus Torvalds static inline unsigned int 1671da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1681da177e4SLinus Torvalds { 1691da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1701da177e4SLinus Torvalds } 1711da177e4SLinus Torvalds 1724d284cacSHeiko Carstens static unsigned int 1731da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1741da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1751da177e4SLinus Torvalds { 1761da177e4SLinus Torvalds int dn, kn; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds switch (rdc->dev_type) { 1791da177e4SLinus Torvalds case 0x3380: 1801da177e4SLinus Torvalds if (kl) 1811da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1821da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1831da177e4SLinus Torvalds else 1841da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1851da177e4SLinus Torvalds case 0x3390: 1861da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1871da177e4SLinus Torvalds if (kl) { 1881da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1891da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1901da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1911da177e4SLinus Torvalds } else 1921da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1931da177e4SLinus Torvalds case 0x9345: 1941da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1951da177e4SLinus Torvalds if (kl) { 1961da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1971da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1981da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1991da177e4SLinus Torvalds } else 2001da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds return 0; 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds 205b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 206b44b0ab3SStefan Weinhuber { 207b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 208b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 209b44b0ab3SStefan Weinhuber geo->head <<= 4; 210b44b0ab3SStefan Weinhuber geo->head |= head; 211b44b0ab3SStefan Weinhuber } 212b44b0ab3SStefan Weinhuber 2135e6bdd37SStefan Haberland /* 2145e6bdd37SStefan Haberland * calculate failing track from sense data depending if 2155e6bdd37SStefan Haberland * it is an EAV device or not 2165e6bdd37SStefan Haberland */ 2175e6bdd37SStefan Haberland static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, 2185e6bdd37SStefan Haberland sector_t *track) 2195e6bdd37SStefan Haberland { 2205e6bdd37SStefan Haberland struct dasd_eckd_private *private = device->private; 2215e6bdd37SStefan Haberland u8 *sense = NULL; 2225e6bdd37SStefan Haberland u32 cyl; 2235e6bdd37SStefan Haberland u8 head; 2245e6bdd37SStefan Haberland 2255e6bdd37SStefan Haberland sense = dasd_get_sense(irb); 2265e6bdd37SStefan Haberland if (!sense) { 2275e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2285e6bdd37SStefan Haberland "ESE error no sense data\n"); 2295e6bdd37SStefan Haberland return -EINVAL; 2305e6bdd37SStefan Haberland } 2315e6bdd37SStefan Haberland if (!(sense[27] & DASD_SENSE_BIT_2)) { 2325e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2335e6bdd37SStefan Haberland "ESE error no valid track data\n"); 2345e6bdd37SStefan Haberland return -EINVAL; 2355e6bdd37SStefan Haberland } 2365e6bdd37SStefan Haberland 2375e6bdd37SStefan Haberland if (sense[27] & DASD_SENSE_BIT_3) { 2385e6bdd37SStefan Haberland /* enhanced addressing */ 2395e6bdd37SStefan Haberland cyl = sense[30] << 20; 2405e6bdd37SStefan Haberland cyl |= (sense[31] & 0xF0) << 12; 2415e6bdd37SStefan Haberland cyl |= sense[28] << 8; 2425e6bdd37SStefan Haberland cyl |= sense[29]; 2435e6bdd37SStefan Haberland } else { 2445e6bdd37SStefan Haberland cyl = sense[29] << 8; 2455e6bdd37SStefan Haberland cyl |= sense[30]; 2465e6bdd37SStefan Haberland } 2475e6bdd37SStefan Haberland head = sense[31] & 0x0F; 2485e6bdd37SStefan Haberland *track = cyl * private->rdc_data.trk_per_cyl + head; 2495e6bdd37SStefan Haberland return 0; 2505e6bdd37SStefan Haberland } 2515e6bdd37SStefan Haberland 2525628683cSStefan Haberland static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 2531da177e4SLinus Torvalds struct dasd_device *device) 2541da177e4SLinus Torvalds { 255543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 256d54853efSMartin Schwidefsky int rc; 2571da177e4SLinus Torvalds 2585628683cSStefan Haberland rc = get_phys_clock(&data->ep_sys_time); 2595628683cSStefan Haberland /* 2605628683cSStefan Haberland * Ignore return code if XRC is not supported or 2615628683cSStefan Haberland * sync clock is switched off 2625628683cSStefan Haberland */ 2635628683cSStefan Haberland if ((rc && !private->rdc_data.facilities.XRC_supported) || 2645628683cSStefan Haberland rc == -EOPNOTSUPP || rc == -EACCES) 265d54853efSMartin Schwidefsky return 0; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2681da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2691da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2701da177e4SLinus Torvalds 27145f186beSJan Höppner if (ccw) { 27245f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 27345f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 27445f186beSJan Höppner } 27545f186beSJan Höppner 276d54853efSMartin Schwidefsky return rc; 2771da177e4SLinus Torvalds } 2781da177e4SLinus Torvalds 2794d284cacSHeiko Carstens static int 280b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 28145f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 28245f186beSJan Höppner int blksize) 2831da177e4SLinus Torvalds { 284543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 285b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 28645f186beSJan Höppner u32 begcyl, endcyl; 287d54853efSMartin Schwidefsky int rc = 0; 2881da177e4SLinus Torvalds 28945f186beSJan Höppner if (ccw) { 2901da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2911da177e4SLinus Torvalds ccw->flags = 0; 2921da177e4SLinus Torvalds ccw->count = 16; 293b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(data); 29445f186beSJan Höppner } 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2971da177e4SLinus Torvalds switch (cmd) { 2981da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2991da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 3001da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 3011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 3021da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 3031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 3041da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 3051da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 3061da177e4SLinus Torvalds data->mask.perm = 0x1; 3071da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 3081da177e4SLinus Torvalds break; 3098fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 3108fd57520SJan Höppner data->mask.perm = 0x1; 3118fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 3128fd57520SJan Höppner break; 31345f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 31445f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 31545f186beSJan Höppner data->mask.perm = 0x1; 31645f186beSJan Höppner data->attributes.operation = private->attrib.operation; 31745f186beSJan Höppner data->blk_size = 0; 31845f186beSJan Höppner break; 3191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 3201da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 3211da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 3221da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 3231da177e4SLinus Torvalds data->mask.perm = 0x02; 3241da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 3255628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3261da177e4SLinus Torvalds break; 3271da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 3281da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 3291da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3305628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3311da177e4SLinus Torvalds break; 3321da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 3331da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3341da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3351da177e4SLinus Torvalds data->mask.perm = 0x3; 3361da177e4SLinus Torvalds data->mask.auth = 0x1; 3371da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3385628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3391da177e4SLinus Torvalds break; 34045f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 34145f186beSJan Höppner data->mask.perm = 0x03; 34245f186beSJan Höppner data->attributes.operation = private->attrib.operation; 34345f186beSJan Höppner data->blk_size = 0; 34445f186beSJan Höppner break; 34545f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 34645f186beSJan Höppner data->mask.perm = 0x02; 34745f186beSJan Höppner data->attributes.operation = private->attrib.operation; 34845f186beSJan Höppner data->blk_size = blksize; 3495628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 35045f186beSJan Höppner break; 3511da177e4SLinus Torvalds default: 352fc19f381SStefan Haberland dev_err(&device->cdev->dev, 353fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 3541da177e4SLinus Torvalds break; 3551da177e4SLinus Torvalds } 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3601da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3611da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3621da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3631da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3641da177e4SLinus Torvalds 365b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 366b44b0ab3SStefan Weinhuber begcyl = trk / heads; 367b44b0ab3SStefan Weinhuber beghead = trk % heads; 368b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 369b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3721da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3731da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3741da177e4SLinus Torvalds 375b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 376b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3771da177e4SLinus Torvalds else 378b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3791da177e4SLinus Torvalds } 3801da177e4SLinus Torvalds 381b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 382b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 383d54853efSMartin Schwidefsky return rc; 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds 3868e09f215SStefan Weinhuber 38745f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 38845f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 38945f186beSJan Höppner int count, int cmd, struct dasd_device *device, 39045f186beSJan Höppner unsigned int reclen, unsigned int tlf) 391f3eb5384SStefan Weinhuber { 392543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 393f3eb5384SStefan Weinhuber int sector; 394f3eb5384SStefan Weinhuber int dn, d; 395f3eb5384SStefan Weinhuber 39645f186beSJan Höppner if (ccw) { 39745f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 39845f186beSJan Höppner ccw->flags = 0; 39945f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 40045f186beSJan Höppner ccw->count = 22; 40145f186beSJan Höppner else 40245f186beSJan Höppner ccw->count = 20; 403b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(data); 40445f186beSJan Höppner } 40545f186beSJan Höppner 406f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 407f3eb5384SStefan Weinhuber sector = 0; 408f3eb5384SStefan Weinhuber if (rec_on_trk) { 409f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 410f3eb5384SStefan Weinhuber case 0x3390: 411f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 412f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 413f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 414f3eb5384SStefan Weinhuber break; 415f3eb5384SStefan Weinhuber case 0x3380: 416f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 417f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 418f3eb5384SStefan Weinhuber break; 419f3eb5384SStefan Weinhuber } 420f3eb5384SStefan Weinhuber } 421f3eb5384SStefan Weinhuber data->sector = sector; 422f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 423f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 424f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 425f3eb5384SStefan Weinhuber */ 426f3eb5384SStefan Weinhuber data->count = count; 427f3eb5384SStefan Weinhuber switch (cmd) { 428f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 429f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 430f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 431f3eb5384SStefan Weinhuber break; 432f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 433f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 434f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 435f3eb5384SStefan Weinhuber break; 436f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 437f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 438f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 439f3eb5384SStefan Weinhuber data->count++; 440f3eb5384SStefan Weinhuber break; 441f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 442f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 443f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 444f3eb5384SStefan Weinhuber data->count++; 445f3eb5384SStefan Weinhuber break; 446f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 447f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 448f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 449f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 450f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 451f3eb5384SStefan Weinhuber data->length = reclen; 452f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 453f3eb5384SStefan Weinhuber break; 454f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 455f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 456f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 457f3eb5384SStefan Weinhuber data->length = reclen; 458f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 459f3eb5384SStefan Weinhuber break; 460e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 461e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 462e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 463e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 464e4dbb0f2SStefan Haberland data->length = 0; 465e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 466e4dbb0f2SStefan Haberland if (data->count > 8) { 467e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 468e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 469e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 470e4dbb0f2SStefan Haberland } else { 471e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 472e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 473e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 474e4dbb0f2SStefan Haberland } 475e4dbb0f2SStefan Haberland data->sector = 0xFF; 476e4dbb0f2SStefan Haberland break; 477f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 478f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 479f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 480f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 481f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 482f3eb5384SStefan Weinhuber break; 483f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 484f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 485f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 486f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 487f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 488f3eb5384SStefan Weinhuber data->length = reclen; 489f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 490f3eb5384SStefan Weinhuber break; 491f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 492f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 493f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 494f3eb5384SStefan Weinhuber data->length = reclen; 495f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 496f3eb5384SStefan Weinhuber break; 497f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 498f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 499f3eb5384SStefan Weinhuber break; 500e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 501e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 502e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 503e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 504e4dbb0f2SStefan Haberland data->sector = 0xFF; 505e4dbb0f2SStefan Haberland break; 506f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 507f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 508f3eb5384SStefan Weinhuber data->length = tlf; 509f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 510f3eb5384SStefan Weinhuber break; 511f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 512f3eb5384SStefan Weinhuber data->length = reclen; 513f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 514f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 515f3eb5384SStefan Weinhuber break; 516f3eb5384SStefan Weinhuber default: 517f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 518f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 519f3eb5384SStefan Weinhuber BUG(); 520f3eb5384SStefan Weinhuber } 521f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 522f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 523f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 524f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 525f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 526f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 527f3eb5384SStefan Weinhuber } 528f3eb5384SStefan Weinhuber 529f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 530b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 531f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 53245f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 533f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 5348e09f215SStefan Weinhuber { 5358e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 536f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 53745f186beSJan Höppner struct DE_eckd_data *dedata; 5388e09f215SStefan Weinhuber int rc = 0; 5398e09f215SStefan Weinhuber 540543691a4SSebastian Ott basepriv = basedev->private; 541543691a4SSebastian Ott startpriv = startdev->private; 542f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 543f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 5448e09f215SStefan Weinhuber 5458e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5468e09f215SStefan Weinhuber ccw->flags = 0; 547e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 548e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 549b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(pfxdata); 550e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 551e4dbb0f2SStefan Haberland } else { 5528e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 553b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(pfxdata); 5548e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 555e4dbb0f2SStefan Haberland } 556e4dbb0f2SStefan Haberland 5578e09f215SStefan Weinhuber /* prefix data */ 558f3eb5384SStefan Weinhuber if (format > 1) { 559f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 560f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 561f3eb5384SStefan Weinhuber BUG(); 562f3eb5384SStefan Weinhuber return -EINVAL; 563f3eb5384SStefan Weinhuber } 564f3eb5384SStefan Weinhuber pfxdata->format = format; 565542e30ceSStefan Haberland pfxdata->base_address = basepriv->conf.ned->unit_addr; 566542e30ceSStefan Haberland pfxdata->base_lss = basepriv->conf.ned->ID; 567f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5688e09f215SStefan Weinhuber 5698e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 570da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 5718e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 572da340f92SStefan Haberland 573da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 574da340f92SStefan Haberland pfxdata->validity.verify_base = 1; 5758e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5768e09f215SStefan Weinhuber } 5778e09f215SStefan Weinhuber 57845f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5798e09f215SStefan Weinhuber 58045f186beSJan Höppner /* 58145f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 58245f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 58345f186beSJan Höppner * reflected in the prefix data as well. 58445f186beSJan Höppner */ 58545f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 58645f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 587f3eb5384SStefan Weinhuber 588f3eb5384SStefan Weinhuber if (format == 1) { 58945f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 590f3eb5384SStefan Weinhuber basedev, blksize, tlf); 591f3eb5384SStefan Weinhuber } 592f3eb5384SStefan Weinhuber 5938e09f215SStefan Weinhuber return rc; 5948e09f215SStefan Weinhuber } 5958e09f215SStefan Weinhuber 596f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 597f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 598f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 599f3eb5384SStefan Weinhuber { 600f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 601f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 602f3eb5384SStefan Weinhuber } 603f3eb5384SStefan Weinhuber 6044d284cacSHeiko Carstens static void 605b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 606b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6071da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6081da177e4SLinus Torvalds { 609543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 6101da177e4SLinus Torvalds int sector; 6111da177e4SLinus Torvalds int dn, d; 6121da177e4SLinus Torvalds 6131da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6141da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6151da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6181da177e4SLinus Torvalds ccw->flags = 0; 6191da177e4SLinus Torvalds ccw->count = 16; 620b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(data); 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6231da177e4SLinus Torvalds sector = 0; 6241da177e4SLinus Torvalds if (rec_on_trk) { 6251da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6261da177e4SLinus Torvalds case 0x3390: 6271da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6281da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6291da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6301da177e4SLinus Torvalds break; 6311da177e4SLinus Torvalds case 0x3380: 6321da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6331da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6341da177e4SLinus Torvalds break; 6351da177e4SLinus Torvalds } 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds data->sector = sector; 6381da177e4SLinus Torvalds data->count = no_rec; 6391da177e4SLinus Torvalds switch (cmd) { 6401da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6411da177e4SLinus Torvalds data->operation.orientation = 0x3; 6421da177e4SLinus Torvalds data->operation.operation = 0x03; 6431da177e4SLinus Torvalds break; 6441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6451da177e4SLinus Torvalds data->operation.orientation = 0x3; 6461da177e4SLinus Torvalds data->operation.operation = 0x16; 6471da177e4SLinus Torvalds break; 6481da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6491da177e4SLinus Torvalds data->operation.orientation = 0x1; 6501da177e4SLinus Torvalds data->operation.operation = 0x03; 6511da177e4SLinus Torvalds data->count++; 6521da177e4SLinus Torvalds break; 6531da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6541da177e4SLinus Torvalds data->operation.orientation = 0x3; 6551da177e4SLinus Torvalds data->operation.operation = 0x16; 6561da177e4SLinus Torvalds data->count++; 6571da177e4SLinus Torvalds break; 6581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6601da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6611da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6621da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6631da177e4SLinus Torvalds data->length = reclen; 6641da177e4SLinus Torvalds data->operation.operation = 0x01; 6651da177e4SLinus Torvalds break; 6661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6681da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6691da177e4SLinus Torvalds data->length = reclen; 6701da177e4SLinus Torvalds data->operation.operation = 0x03; 6711da177e4SLinus Torvalds break; 6721da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6731da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6741da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6751da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6761da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6771da177e4SLinus Torvalds data->length = reclen; 6781da177e4SLinus Torvalds data->operation.operation = 0x06; 6791da177e4SLinus Torvalds break; 6801da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6811da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6821da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6831da177e4SLinus Torvalds data->length = reclen; 6841da177e4SLinus Torvalds data->operation.operation = 0x16; 6851da177e4SLinus Torvalds break; 6861da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6871da177e4SLinus Torvalds data->operation.operation = 0x06; 6881da177e4SLinus Torvalds break; 6891da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6901da177e4SLinus Torvalds data->length = reclen; 6911da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6921da177e4SLinus Torvalds data->operation.operation = 0x0b; 6931da177e4SLinus Torvalds break; 6941da177e4SLinus Torvalds default: 695fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 696fc19f381SStefan Haberland "opcode 0x%x", cmd); 6971da177e4SLinus Torvalds } 698b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 699b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 700b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 701b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 702b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7031da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7041da177e4SLinus Torvalds } 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds /* 7071da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7081da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7091da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7101da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7111da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7121da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7131da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7141da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7151da177e4SLinus Torvalds */ 7161da177e4SLinus Torvalds static inline int 7171da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7181da177e4SLinus Torvalds { 7191da177e4SLinus Torvalds if (recid < 3) 7201da177e4SLinus Torvalds return 1; 7211da177e4SLinus Torvalds if (recid < blk_per_trk) 7221da177e4SLinus Torvalds return 0; 7231da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7241da177e4SLinus Torvalds return 1; 7251da177e4SLinus Torvalds return 0; 7261da177e4SLinus Torvalds } 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds /* 7291da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7301da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7311da177e4SLinus Torvalds * for the recid. 7321da177e4SLinus Torvalds */ 7331da177e4SLinus Torvalds static inline int 7341da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7351da177e4SLinus Torvalds { 7361da177e4SLinus Torvalds if (recid < 3) 7371da177e4SLinus Torvalds return sizes_trk0[recid]; 7381da177e4SLinus Torvalds return LABEL_SIZE; 7391da177e4SLinus Torvalds } 740b206181dSStefan Haberland /* create unique id from private structure. */ 741542e30ceSStefan Haberland static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid) 7423d052595SHorst Hummel { 7434abb08c2SStefan Weinhuber int count; 7443d052595SHorst Hummel 7453d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 746542e30ceSStefan Haberland memcpy(uid->vendor, conf->ned->HDA_manufacturer, 7473d052595SHorst Hummel sizeof(uid->vendor) - 1); 7483d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 749542e30ceSStefan Haberland memcpy(uid->serial, &conf->ned->serial, 7503d052595SHorst Hummel sizeof(uid->serial) - 1); 7513d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 752542e30ceSStefan Haberland uid->ssid = conf->gneq->subsystemID; 753542e30ceSStefan Haberland uid->real_unit_addr = conf->ned->unit_addr; 754542e30ceSStefan Haberland if (conf->sneq) { 755542e30ceSStefan Haberland uid->type = conf->sneq->sua_flags; 7568e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 757542e30ceSStefan Haberland uid->base_unit_addr = conf->sneq->base_unit_addr; 7588e09f215SStefan Weinhuber } else { 7598e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7608e09f215SStefan Weinhuber } 761542e30ceSStefan Haberland if (conf->vdsneq) { 7624abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7634abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 764542e30ceSStefan Haberland conf->vdsneq->uit[count]); 7654abb08c2SStefan Weinhuber } 7664abb08c2SStefan Weinhuber } 767b206181dSStefan Haberland } 768b206181dSStefan Haberland 769b206181dSStefan Haberland /* 770b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 771b206181dSStefan Haberland */ 772b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 773b206181dSStefan Haberland { 774543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 775b206181dSStefan Haberland unsigned long flags; 776b206181dSStefan Haberland 777b206181dSStefan Haberland if (!private) 778b206181dSStefan Haberland return -ENODEV; 779542e30ceSStefan Haberland if (!private->conf.ned || !private->conf.gneq) 780b206181dSStefan Haberland return -ENODEV; 781b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 782542e30ceSStefan Haberland create_uid(&private->conf, &private->uid); 7832dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7843d052595SHorst Hummel return 0; 7853d052595SHorst Hummel } 7863d052595SHorst Hummel 7872dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7882dedf0d9SStefan Haberland { 789543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7902dedf0d9SStefan Haberland unsigned long flags; 7912dedf0d9SStefan Haberland 792543691a4SSebastian Ott if (private) { 7932dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7942dedf0d9SStefan Haberland *uid = private->uid; 7952dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7962dedf0d9SStefan Haberland return 0; 7972dedf0d9SStefan Haberland } 7982dedf0d9SStefan Haberland return -EINVAL; 7992dedf0d9SStefan Haberland } 8002dedf0d9SStefan Haberland 801b206181dSStefan Haberland /* 802b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 803b206181dSStefan Haberland * return 0 for match 804b206181dSStefan Haberland */ 805b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 806542e30ceSStefan Haberland struct dasd_conf *path_conf) 807b206181dSStefan Haberland { 808b206181dSStefan Haberland struct dasd_uid device_uid; 809542e30ceSStefan Haberland struct dasd_uid path_uid; 810b206181dSStefan Haberland 811542e30ceSStefan Haberland create_uid(path_conf, &path_uid); 812b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 813b206181dSStefan Haberland 814542e30ceSStefan Haberland return memcmp(&device_uid, &path_uid, sizeof(struct dasd_uid)); 815b206181dSStefan Haberland } 816b206181dSStefan Haberland 817a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 818a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 819a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 820a4d26c6aSStefan Weinhuber __u8 lpm) 82117283b56SCornelia Huck { 82217283b56SCornelia Huck struct ccw1 *ccw; 823a4d26c6aSStefan Weinhuber /* 824a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 825a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 826a4d26c6aSStefan Weinhuber */ 827a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 828a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 829a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 830a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 83117283b56SCornelia Huck 83217283b56SCornelia Huck ccw = cqr->cpaddr; 833a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 834a4d26c6aSStefan Weinhuber ccw->flags = 0; 835b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(rcd_buffer); 836a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 837a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 83817283b56SCornelia Huck 8398e09f215SStefan Weinhuber cqr->startdev = device; 8408e09f215SStefan Weinhuber cqr->memdev = device; 8418e09f215SStefan Weinhuber cqr->block = NULL; 84217283b56SCornelia Huck cqr->expires = 10*HZ; 84317283b56SCornelia Huck cqr->lpm = lpm; 844eb6e199bSStefan Weinhuber cqr->retries = 256; 8451aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 84617283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 847a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 848a4d26c6aSStefan Weinhuber } 849a4d26c6aSStefan Weinhuber 8505915a873SStefan Haberland /* 8515915a873SStefan Haberland * Wakeup helper for read_conf 8525915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8535915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8545915a873SStefan Haberland * to show support for virtual device SNEQ 8555915a873SStefan Haberland */ 8565915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8575915a873SStefan Haberland { 8585915a873SStefan Haberland struct ccw1 *ccw; 8595915a873SStefan Haberland __u8 *rcd_buffer; 8605915a873SStefan Haberland 8615915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8625915a873SStefan Haberland ccw = cqr->cpaddr; 863b87c52e4SAlexander Gordeev rcd_buffer = phys_to_virt(ccw->cda); 8645915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8655915a873SStefan Haberland 8665915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8675915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8685915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8695915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8705915a873SStefan Haberland } 8715915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8725915a873SStefan Haberland } 8735915a873SStefan Haberland 874a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 875a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 876a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 877a4d26c6aSStefan Weinhuber __u8 lpm) 878a4d26c6aSStefan Weinhuber { 879a4d26c6aSStefan Weinhuber struct ciw *ciw; 880a4d26c6aSStefan Weinhuber int rc; 881a4d26c6aSStefan Weinhuber /* 882a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 883a4d26c6aSStefan Weinhuber * some devices do not support RCD 884a4d26c6aSStefan Weinhuber */ 885a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 886a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 887a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 888a4d26c6aSStefan Weinhuber 889a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 890a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8915a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 892a4d26c6aSStefan Weinhuber cqr->retries = 5; 8935915a873SStefan Haberland cqr->callback = read_conf_cb; 894a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 895a4d26c6aSStefan Weinhuber return rc; 89617283b56SCornelia Huck } 89717283b56SCornelia Huck 89817283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 89917283b56SCornelia Huck void **rcd_buffer, 90017283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 90117283b56SCornelia Huck { 90217283b56SCornelia Huck struct ciw *ciw; 90317283b56SCornelia Huck char *rcd_buf = NULL; 90417283b56SCornelia Huck int ret; 90517283b56SCornelia Huck struct dasd_ccw_req *cqr; 90617283b56SCornelia Huck 90717283b56SCornelia Huck /* 908a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 909a4d26c6aSStefan Weinhuber * some devices do not support RCD 91017283b56SCornelia Huck */ 91117283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 912a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 91317283b56SCornelia Huck ret = -EOPNOTSUPP; 91417283b56SCornelia Huck goto out_error; 91517283b56SCornelia Huck } 916a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 91717283b56SCornelia Huck if (!rcd_buf) { 91817283b56SCornelia Huck ret = -ENOMEM; 91917283b56SCornelia Huck goto out_error; 92017283b56SCornelia Huck } 921a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 922a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 923c5205f2fSSebastian Ott device, NULL); 92417283b56SCornelia Huck if (IS_ERR(cqr)) { 925a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 926a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 927a4d26c6aSStefan Weinhuber ret = -ENOMEM; 92817283b56SCornelia Huck goto out_error; 92917283b56SCornelia Huck } 930a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9315915a873SStefan Haberland cqr->callback = read_conf_cb; 93217283b56SCornelia Huck ret = dasd_sleep_on(cqr); 93317283b56SCornelia Huck /* 93417283b56SCornelia Huck * on success we update the user input parms 93517283b56SCornelia Huck */ 9368e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 93717283b56SCornelia Huck if (ret) 93817283b56SCornelia Huck goto out_error; 93917283b56SCornelia Huck 940a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 94117283b56SCornelia Huck *rcd_buffer = rcd_buf; 94217283b56SCornelia Huck return 0; 94317283b56SCornelia Huck out_error: 94417283b56SCornelia Huck kfree(rcd_buf); 94517283b56SCornelia Huck *rcd_buffer = NULL; 94617283b56SCornelia Huck *rcd_buffer_size = 0; 94717283b56SCornelia Huck return ret; 94817283b56SCornelia Huck } 94917283b56SCornelia Huck 950542e30ceSStefan Haberland static int dasd_eckd_identify_conf_parts(struct dasd_conf *conf) 9514abb08c2SStefan Weinhuber { 9524abb08c2SStefan Weinhuber 9534abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9544abb08c2SStefan Weinhuber int i, count; 9554abb08c2SStefan Weinhuber 956542e30ceSStefan Haberland conf->ned = NULL; 957542e30ceSStefan Haberland conf->sneq = NULL; 958542e30ceSStefan Haberland conf->vdsneq = NULL; 959542e30ceSStefan Haberland conf->gneq = NULL; 960542e30ceSStefan Haberland count = conf->len / sizeof(struct dasd_sneq); 961542e30ceSStefan Haberland sneq = (struct dasd_sneq *)conf->data; 9624abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9634abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 964542e30ceSStefan Haberland conf->sneq = sneq; 9654abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 966542e30ceSStefan Haberland conf->vdsneq = (struct vd_sneq *)sneq; 9674abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 968542e30ceSStefan Haberland conf->gneq = (struct dasd_gneq *)sneq; 9694abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 970542e30ceSStefan Haberland conf->ned = (struct dasd_ned *)sneq; 9714abb08c2SStefan Weinhuber sneq++; 9724abb08c2SStefan Weinhuber } 973542e30ceSStefan Haberland if (!conf->ned || !conf->gneq) { 974542e30ceSStefan Haberland conf->ned = NULL; 975542e30ceSStefan Haberland conf->sneq = NULL; 976542e30ceSStefan Haberland conf->vdsneq = NULL; 977542e30ceSStefan Haberland conf->gneq = NULL; 9784abb08c2SStefan Weinhuber return -EINVAL; 9794abb08c2SStefan Weinhuber } 9804abb08c2SStefan Weinhuber return 0; 9814abb08c2SStefan Weinhuber 9824abb08c2SStefan Weinhuber }; 9834abb08c2SStefan Weinhuber 9844abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9854abb08c2SStefan Weinhuber { 9864abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9874abb08c2SStefan Weinhuber int i, count, found; 9884abb08c2SStefan Weinhuber 9894abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9904abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9914abb08c2SStefan Weinhuber found = 0; 9924abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9934abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9944abb08c2SStefan Weinhuber found = 1; 9954abb08c2SStefan Weinhuber break; 9964abb08c2SStefan Weinhuber } 9974abb08c2SStefan Weinhuber gneq++; 9984abb08c2SStefan Weinhuber } 9994abb08c2SStefan Weinhuber if (found) 10004abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10014abb08c2SStefan Weinhuber else 10024abb08c2SStefan Weinhuber return 0; 10034abb08c2SStefan Weinhuber } 10044abb08c2SStefan Weinhuber 1005d2a52758SJan Höppner static void dasd_eckd_store_conf_data(struct dasd_device *device, 1006d2a52758SJan Höppner struct dasd_conf_data *conf_data, int chp) 1007d2a52758SJan Höppner { 1008952835edSStefan Haberland struct dasd_eckd_private *private = device->private; 1009d2a52758SJan Höppner struct channel_path_desc_fmt0 *chp_desc; 1010d2a52758SJan Höppner struct subchannel_id sch_id; 1011952835edSStefan Haberland void *cdp; 1012d2a52758SJan Höppner 101346018121SJan Höppner /* 101446018121SJan Höppner * path handling and read_conf allocate data 101546018121SJan Höppner * free it before replacing the pointer 1016952835edSStefan Haberland * also replace the old private->conf_data pointer 1017952835edSStefan Haberland * with the new one if this points to the same data 101846018121SJan Höppner */ 1019952835edSStefan Haberland cdp = device->path[chp].conf_data; 1020542e30ceSStefan Haberland if (private->conf.data == cdp) { 1021542e30ceSStefan Haberland private->conf.data = (void *)conf_data; 1022542e30ceSStefan Haberland dasd_eckd_identify_conf_parts(&private->conf); 1023952835edSStefan Haberland } 1024952835edSStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 1025d2a52758SJan Höppner device->path[chp].conf_data = conf_data; 1026d2a52758SJan Höppner device->path[chp].cssid = sch_id.cssid; 1027d2a52758SJan Höppner device->path[chp].ssid = sch_id.ssid; 1028d2a52758SJan Höppner chp_desc = ccw_device_get_chp_desc(device->cdev, chp); 1029d2a52758SJan Höppner if (chp_desc) 1030d2a52758SJan Höppner device->path[chp].chpid = chp_desc->chpid; 1031d2a52758SJan Höppner kfree(chp_desc); 1032952835edSStefan Haberland kfree(cdp); 1033d2a52758SJan Höppner } 1034d2a52758SJan Höppner 1035c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1036c7c0c9deSStefan Haberland { 1037543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1038c7c0c9deSStefan Haberland int i; 1039c7c0c9deSStefan Haberland 1040542e30ceSStefan Haberland private->conf.data = NULL; 1041542e30ceSStefan Haberland private->conf.len = 0; 1042c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1043c9346151SStefan Haberland kfree(device->path[i].conf_data); 1044c9346151SStefan Haberland device->path[i].conf_data = NULL; 1045a521b048SStefan Haberland device->path[i].cssid = 0; 1046a521b048SStefan Haberland device->path[i].ssid = 0; 1047a521b048SStefan Haberland device->path[i].chpid = 0; 10489e34c8baSJan Höppner dasd_path_notoper(device, i); 1049c7c0c9deSStefan Haberland } 1050c7c0c9deSStefan Haberland } 1051c7c0c9deSStefan Haberland 105219508b20SJan Höppner static void dasd_eckd_read_fc_security(struct dasd_device *device) 105319508b20SJan Höppner { 105419508b20SJan Höppner struct dasd_eckd_private *private = device->private; 105519508b20SJan Höppner u8 esm_valid; 105619508b20SJan Höppner u8 esm[8]; 105719508b20SJan Höppner int chp; 105819508b20SJan Höppner int rc; 105919508b20SJan Höppner 106019508b20SJan Höppner rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); 106119508b20SJan Höppner if (rc) { 106219508b20SJan Höppner for (chp = 0; chp < 8; chp++) 106319508b20SJan Höppner device->path[chp].fc_security = 0; 106419508b20SJan Höppner return; 106519508b20SJan Höppner } 106619508b20SJan Höppner 106719508b20SJan Höppner for (chp = 0; chp < 8; chp++) { 106819508b20SJan Höppner if (esm_valid & (0x80 >> chp)) 106919508b20SJan Höppner device->path[chp].fc_security = esm[chp]; 107019508b20SJan Höppner else 107119508b20SJan Höppner device->path[chp].fc_security = 0; 1072c7c0c9deSStefan Haberland } 1073c7c0c9deSStefan Haberland } 1074c7c0c9deSStefan Haberland 1075542e30ceSStefan Haberland static void dasd_eckd_get_uid_string(struct dasd_conf *conf, 107623596961SStefan Haberland char *print_uid) 107723596961SStefan Haberland { 1078542e30ceSStefan Haberland struct dasd_uid uid; 107923596961SStefan Haberland 1080542e30ceSStefan Haberland create_uid(conf, &uid); 1081542e30ceSStefan Haberland if (strlen(uid.vduit) > 0) 108223596961SStefan Haberland snprintf(print_uid, sizeof(*print_uid), 108323596961SStefan Haberland "%s.%s.%04x.%02x.%s", 1084542e30ceSStefan Haberland uid.vendor, uid.serial, uid.ssid, 1085542e30ceSStefan Haberland uid.real_unit_addr, uid.vduit); 108623596961SStefan Haberland else 108723596961SStefan Haberland snprintf(print_uid, sizeof(*print_uid), 108823596961SStefan Haberland "%s.%s.%04x.%02x", 1089542e30ceSStefan Haberland uid.vendor, uid.serial, uid.ssid, 1090542e30ceSStefan Haberland uid.real_unit_addr); 109123596961SStefan Haberland } 109223596961SStefan Haberland 109323596961SStefan Haberland static int dasd_eckd_check_cabling(struct dasd_device *device, 109423596961SStefan Haberland void *conf_data, __u8 lpm) 109523596961SStefan Haberland { 109623596961SStefan Haberland struct dasd_eckd_private *private = device->private; 109723596961SStefan Haberland char print_path_uid[60], print_device_uid[60]; 1098542e30ceSStefan Haberland struct dasd_conf path_conf; 109923596961SStefan Haberland 1100542e30ceSStefan Haberland path_conf.data = conf_data; 1101542e30ceSStefan Haberland path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1102542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_conf)) 110323596961SStefan Haberland return 1; 110423596961SStefan Haberland 1105542e30ceSStefan Haberland if (dasd_eckd_compare_path_uid(device, &path_conf)) { 1106542e30ceSStefan Haberland dasd_eckd_get_uid_string(&path_conf, print_path_uid); 1107542e30ceSStefan Haberland dasd_eckd_get_uid_string(&private->conf, print_device_uid); 110823596961SStefan Haberland dev_err(&device->cdev->dev, 110923596961SStefan Haberland "Not all channel paths lead to the same device, path %02X leads to device %s instead of %s\n", 111023596961SStefan Haberland lpm, print_path_uid, print_device_uid); 111123596961SStefan Haberland return 1; 111223596961SStefan Haberland } 111323596961SStefan Haberland 111423596961SStefan Haberland return 0; 111523596961SStefan Haberland } 111623596961SStefan Haberland 11174abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 11181da177e4SLinus Torvalds { 11191da177e4SLinus Torvalds void *conf_data; 11201da177e4SLinus Torvalds int conf_len, conf_data_saved; 1121b179b037SStefan Haberland int rc, path_err, pos; 1122a4d26c6aSStefan Weinhuber __u8 lpm, opm; 112323596961SStefan Haberland struct dasd_eckd_private *private; 11241da177e4SLinus Torvalds 1125543691a4SSebastian Ott private = device->private; 1126a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 11271da177e4SLinus Torvalds conf_data_saved = 0; 112855d3a85cSStefan Haberland path_err = 0; 11291da177e4SLinus Torvalds /* get configuration data per operational path */ 11301da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1131b206181dSStefan Haberland if (!(lpm & opm)) 1132b206181dSStefan Haberland continue; 113317283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 11341da177e4SLinus Torvalds &conf_len, lpm); 11351da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1136b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 11371da177e4SLinus Torvalds "Read configuration data returned " 1138b8ed5dd5SStefan Haberland "error %d", rc); 11391da177e4SLinus Torvalds return rc; 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds if (conf_data == NULL) { 1142b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1143b8ed5dd5SStefan Haberland "No configuration data " 1144b8ed5dd5SStefan Haberland "retrieved"); 1145a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1146c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1147d133a960SGabriel Craciunescu continue; /* no error */ 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds /* save first valid configuration data */ 11501da177e4SLinus Torvalds if (!conf_data_saved) { 1151c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1152c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 1153542e30ceSStefan Haberland private->conf.data = conf_data; 1154542e30ceSStefan Haberland private->conf.len = conf_len; 1155542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&private->conf)) { 1156542e30ceSStefan Haberland private->conf.data = NULL; 1157542e30ceSStefan Haberland private->conf.len = 0; 11584abb08c2SStefan Weinhuber kfree(conf_data); 11594abb08c2SStefan Weinhuber continue; 11604abb08c2SStefan Weinhuber } 1161b206181dSStefan Haberland /* 1162b206181dSStefan Haberland * build device UID that other path data 1163b206181dSStefan Haberland * can be compared to it 1164b206181dSStefan Haberland */ 1165b206181dSStefan Haberland dasd_eckd_generate_uid(device); 11661da177e4SLinus Torvalds conf_data_saved++; 116723596961SStefan Haberland } else if (dasd_eckd_check_cabling(device, conf_data, lpm)) { 116823596961SStefan Haberland dasd_path_add_cablepm(device, lpm); 116923596961SStefan Haberland path_err = -EINVAL; 1170b206181dSStefan Haberland kfree(conf_data); 1171b206181dSStefan Haberland continue; 1172b206181dSStefan Haberland } 1173d2a52758SJan Höppner 1174d2a52758SJan Höppner pos = pathmask_to_pos(lpm); 1175d2a52758SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 1176d2a52758SJan Höppner 11774abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11781da177e4SLinus Torvalds case 0x02: 1179c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11801da177e4SLinus Torvalds break; 11811da177e4SLinus Torvalds case 0x03: 1182c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11831da177e4SLinus Torvalds break; 11841da177e4SLinus Torvalds } 1185c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1186c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1187ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1188ccc0e7dcSStefan Haberland } else { 1189c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1190ccc0e7dcSStefan Haberland } 11911da177e4SLinus Torvalds } 1192b206181dSStefan Haberland 119355d3a85cSStefan Haberland return path_err; 11941da177e4SLinus Torvalds } 11951da177e4SLinus Torvalds 1196a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1197a521b048SStefan Haberland { 1198a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1199a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1200dd4b3c83SJan Höppner unsigned int mdc; 1201dd4b3c83SJan Höppner int tpm; 1202a521b048SStefan Haberland 1203a521b048SStefan Haberland if (dasd_nofcx) 1204a521b048SStefan Haberland return 0; 1205a521b048SStefan Haberland /* is transport mode supported? */ 1206a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1207542e30ceSStefan Haberland fcx_in_gneq = private->conf.gneq->reserved2[7] & 0x04; 1208a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1209a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1210a521b048SStefan Haberland 1211a521b048SStefan Haberland if (!tpm) 1212a521b048SStefan Haberland return 0; 1213a521b048SStefan Haberland 1214a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1215dd4b3c83SJan Höppner if (mdc == 0) { 1216a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1217a521b048SStefan Haberland return 0; 1218a521b048SStefan Haberland } else { 1219a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1220a521b048SStefan Haberland } 1221a521b048SStefan Haberland } 1222a521b048SStefan Haberland 1223a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1224a4d26c6aSStefan Weinhuber { 1225543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1226dd4b3c83SJan Höppner unsigned int mdc; 1227a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1228a4d26c6aSStefan Weinhuber 1229a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1230a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1231dd4b3c83SJan Höppner if (mdc == 0) { 1232a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1233a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1234a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1235a4d26c6aSStefan Weinhuber mdc, lpm); 1236a4d26c6aSStefan Weinhuber return mdc; 1237a4d26c6aSStefan Weinhuber } 12380f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1239a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1240a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1241a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1242a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1243a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1244a4d26c6aSStefan Weinhuber private->fcx_max_data); 1245a4d26c6aSStefan Weinhuber return -EACCES; 1246a4d26c6aSStefan Weinhuber } 1247a4d26c6aSStefan Weinhuber } 1248a4d26c6aSStefan Weinhuber return 0; 1249a4d26c6aSStefan Weinhuber } 1250a4d26c6aSStefan Weinhuber 1251b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1252b7294932SJan Höppner struct pe_handler_work_data *data) 1253b206181dSStefan Haberland { 1254543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1255c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1256543691a4SSebastian Ott int rc = -ENODEV; 1257b206181dSStefan Haberland 1258b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1259b206181dSStefan Haberland if (!(lpm & opm)) 1260b206181dSStefan Haberland continue; 1261b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1262b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1263b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1264b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1265b206181dSStefan Haberland data->rcd_buffer, 1266b206181dSStefan Haberland lpm); 1267b206181dSStefan Haberland 1268b206181dSStefan Haberland if (rc) { 1269b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1270b206181dSStefan Haberland continue; 1271b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1272b206181dSStefan Haberland "Read configuration data " 1273b206181dSStefan Haberland "returned error %d", rc); 1274b206181dSStefan Haberland break; 1275b206181dSStefan Haberland } 1276542e30ceSStefan Haberland memcpy(private->conf.data, data->rcd_buffer, 1277b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1278542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&private->conf)) { 1279b206181dSStefan Haberland rc = -ENODEV; 1280b206181dSStefan Haberland } else /* first valid path is enough */ 1281b206181dSStefan Haberland break; 1282b206181dSStefan Haberland } 1283b206181dSStefan Haberland 1284b206181dSStefan Haberland if (!rc) 1285b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1286b206181dSStefan Haberland 1287b206181dSStefan Haberland return rc; 1288b206181dSStefan Haberland } 1289b206181dSStefan Haberland 1290b7294932SJan Höppner static void dasd_eckd_path_available_action(struct dasd_device *device, 1291b7294932SJan Höppner struct pe_handler_work_data *data) 1292a4d26c6aSStefan Weinhuber { 1293b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12945db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 129546018121SJan Höppner struct dasd_conf_data *conf_data; 1296542e30ceSStefan Haberland struct dasd_conf path_conf; 1297a4d26c6aSStefan Weinhuber unsigned long flags; 1298b206181dSStefan Haberland char print_uid[60]; 129946018121SJan Höppner int rc, pos; 1300a4d26c6aSStefan Weinhuber 1301a4d26c6aSStefan Weinhuber opm = 0; 1302a4d26c6aSStefan Weinhuber npm = 0; 1303a4d26c6aSStefan Weinhuber ppm = 0; 1304a4d26c6aSStefan Weinhuber epm = 0; 13055db8440cSStefan Haberland hpfpm = 0; 13065db8440cSStefan Haberland cablepm = 0; 13075db8440cSStefan Haberland 1308a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1309b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1310b206181dSStefan Haberland continue; 1311b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1312a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1313a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1314a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1315a4d26c6aSStefan Weinhuber data->rcd_buffer, 1316a4d26c6aSStefan Weinhuber lpm); 1317a4d26c6aSStefan Weinhuber if (!rc) { 1318a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1319b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1320b206181dSStefan Haberland ) { 1321a4d26c6aSStefan Weinhuber case 0x02: 1322a4d26c6aSStefan Weinhuber npm |= lpm; 1323a4d26c6aSStefan Weinhuber break; 1324a4d26c6aSStefan Weinhuber case 0x03: 1325a4d26c6aSStefan Weinhuber ppm |= lpm; 1326a4d26c6aSStefan Weinhuber break; 1327a4d26c6aSStefan Weinhuber } 1328a4d26c6aSStefan Weinhuber opm |= lpm; 1329a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1330a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1331a4d26c6aSStefan Weinhuber "path verification: No configuration " 1332a4d26c6aSStefan Weinhuber "data retrieved"); 1333a4d26c6aSStefan Weinhuber opm |= lpm; 1334a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1335a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1336a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1337a4d26c6aSStefan Weinhuber " try again later"); 1338a4d26c6aSStefan Weinhuber epm |= lpm; 1339a4d26c6aSStefan Weinhuber } else { 1340a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1341a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1342a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1343a4d26c6aSStefan Weinhuber continue; 1344a4d26c6aSStefan Weinhuber } 1345a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1346a4d26c6aSStefan Weinhuber opm &= ~lpm; 1347a4d26c6aSStefan Weinhuber npm &= ~lpm; 1348a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13495db8440cSStefan Haberland hpfpm |= lpm; 1350b206181dSStefan Haberland continue; 1351b206181dSStefan Haberland } 1352b206181dSStefan Haberland 1353b206181dSStefan Haberland /* 1354b206181dSStefan Haberland * save conf_data for comparison after 1355b206181dSStefan Haberland * rebuild_device_uid may have changed 1356b206181dSStefan Haberland * the original data 1357b206181dSStefan Haberland */ 1358b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1359b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1360542e30ceSStefan Haberland path_conf.data = (void *)&path_rcd_buf; 1361542e30ceSStefan Haberland path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1362542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_conf)) { 1363542e30ceSStefan Haberland path_conf.data = NULL; 1364542e30ceSStefan Haberland path_conf.len = 0; 1365b206181dSStefan Haberland continue; 1366b206181dSStefan Haberland } 1367b206181dSStefan Haberland 1368b206181dSStefan Haberland /* 1369b206181dSStefan Haberland * compare path UID with device UID only if at least 1370b206181dSStefan Haberland * one valid path is left 1371b206181dSStefan Haberland * in other case the device UID may have changed and 1372b206181dSStefan Haberland * the first working path UID will be used as device UID 1373b206181dSStefan Haberland */ 1374c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1375542e30ceSStefan Haberland dasd_eckd_compare_path_uid(device, &path_conf)) { 1376b206181dSStefan Haberland /* 1377b206181dSStefan Haberland * the comparison was not successful 1378b206181dSStefan Haberland * rebuild the device UID with at least one 1379b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1380b206181dSStefan Haberland * has changed the device 1381b206181dSStefan Haberland * 1382b206181dSStefan Haberland * after this compare again 1383b206181dSStefan Haberland * 1384b206181dSStefan Haberland * if either the rebuild or the recompare fails 1385b206181dSStefan Haberland * the path can not be used 1386b206181dSStefan Haberland */ 1387b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1388b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1389542e30ceSStefan Haberland device, &path_conf)) { 1390542e30ceSStefan Haberland dasd_eckd_get_uid_string(&path_conf, print_uid); 1391b206181dSStefan Haberland dev_err(&device->cdev->dev, 1392b206181dSStefan Haberland "The newly added channel path %02X " 1393b206181dSStefan Haberland "will not be used because it leads " 1394b206181dSStefan Haberland "to a different device %s\n", 1395b206181dSStefan Haberland lpm, print_uid); 1396b206181dSStefan Haberland opm &= ~lpm; 1397b206181dSStefan Haberland npm &= ~lpm; 1398b206181dSStefan Haberland ppm &= ~lpm; 13995db8440cSStefan Haberland cablepm |= lpm; 1400b206181dSStefan Haberland continue; 1401a4d26c6aSStefan Weinhuber } 1402a4d26c6aSStefan Weinhuber } 1403b206181dSStefan Haberland 140446018121SJan Höppner conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); 140546018121SJan Höppner if (conf_data) { 140646018121SJan Höppner memcpy(conf_data, data->rcd_buffer, 140746018121SJan Höppner DASD_ECKD_RCD_DATA_SIZE); 14089dffede0SStefan Haberland } else { 14099dffede0SStefan Haberland /* 14109dffede0SStefan Haberland * path is operational but path config data could not 14119dffede0SStefan Haberland * be stored due to low mem condition 14129dffede0SStefan Haberland * add it to the error path mask and schedule a path 14139dffede0SStefan Haberland * verification later that this could be added again 14149dffede0SStefan Haberland */ 14159dffede0SStefan Haberland epm |= lpm; 141646018121SJan Höppner } 141746018121SJan Höppner pos = pathmask_to_pos(lpm); 141846018121SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 141946018121SJan Höppner 1420a4d26c6aSStefan Weinhuber /* 1421a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1422a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1423a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1424a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1425a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1426a4d26c6aSStefan Weinhuber */ 1427a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1428c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1429c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1430a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14315db8440cSStefan Haberland } else { 1432c9346151SStefan Haberland dasd_path_add_opm(device, opm); 14335db8440cSStefan Haberland } 1434c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1435c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 14369dffede0SStefan Haberland if (epm) { 1437c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 14389dffede0SStefan Haberland dasd_device_set_timer(device, 50); 14399dffede0SStefan Haberland } 1440c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1441c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1442a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 144319508b20SJan Höppner 144419508b20SJan Höppner dasd_path_create_kobj(device, pos); 1445b206181dSStefan Haberland } 1446b7294932SJan Höppner } 1447b7294932SJan Höppner 1448b7294932SJan Höppner static void do_pe_handler_work(struct work_struct *work) 1449b7294932SJan Höppner { 1450b7294932SJan Höppner struct pe_handler_work_data *data; 1451b7294932SJan Höppner struct dasd_device *device; 1452b7294932SJan Höppner 1453b7294932SJan Höppner data = container_of(work, struct pe_handler_work_data, worker); 1454b7294932SJan Höppner device = data->device; 1455b7294932SJan Höppner 1456b7294932SJan Höppner /* delay path verification until device was resumed */ 1457b7294932SJan Höppner if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1458b7294932SJan Höppner schedule_work(work); 1459b7294932SJan Höppner return; 1460b7294932SJan Höppner } 1461b7294932SJan Höppner /* check if path verification already running and delay if so */ 1462b7294932SJan Höppner if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1463b7294932SJan Höppner schedule_work(work); 1464b7294932SJan Höppner return; 1465b7294932SJan Höppner } 1466b7294932SJan Höppner 14674d063e64SJan Höppner if (data->tbvpm) 1468b7294932SJan Höppner dasd_eckd_path_available_action(device, data); 14694d063e64SJan Höppner if (data->fcsecpm) 14704d063e64SJan Höppner dasd_eckd_read_fc_security(device); 1471b7294932SJan Höppner 14721eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1473a4d26c6aSStefan Weinhuber dasd_put_device(device); 1474a4d26c6aSStefan Weinhuber if (data->isglobal) 1475b7294932SJan Höppner mutex_unlock(&dasd_pe_handler_mutex); 1476a4d26c6aSStefan Weinhuber else 1477a4d26c6aSStefan Weinhuber kfree(data); 1478a4d26c6aSStefan Weinhuber } 1479a4d26c6aSStefan Weinhuber 14804d063e64SJan Höppner static int dasd_eckd_pe_handler(struct dasd_device *device, 14814d063e64SJan Höppner __u8 tbvpm, __u8 fcsecpm) 1482a4d26c6aSStefan Weinhuber { 1483b7294932SJan Höppner struct pe_handler_work_data *data; 1484a4d26c6aSStefan Weinhuber 1485f1c8781aSHaowen Bai data = kzalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1486a4d26c6aSStefan Weinhuber if (!data) { 1487b7294932SJan Höppner if (mutex_trylock(&dasd_pe_handler_mutex)) { 1488b7294932SJan Höppner data = pe_handler_worker; 1489a4d26c6aSStefan Weinhuber data->isglobal = 1; 1490b7294932SJan Höppner } else { 1491a4d26c6aSStefan Weinhuber return -ENOMEM; 1492b7294932SJan Höppner } 1493a4d26c6aSStefan Weinhuber } 1494b7294932SJan Höppner INIT_WORK(&data->worker, do_pe_handler_work); 1495a4d26c6aSStefan Weinhuber dasd_get_device(device); 1496a4d26c6aSStefan Weinhuber data->device = device; 14974d063e64SJan Höppner data->tbvpm = tbvpm; 14984d063e64SJan Höppner data->fcsecpm = fcsecpm; 1499a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1500a4d26c6aSStefan Weinhuber return 0; 1501a4d26c6aSStefan Weinhuber } 1502a4d26c6aSStefan Weinhuber 1503a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1504a521b048SStefan Haberland { 1505a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1506a521b048SStefan Haberland unsigned long flags; 1507a521b048SStefan Haberland 1508a521b048SStefan Haberland if (!private->fcx_max_data) 1509a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1510a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1511a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1512a521b048SStefan Haberland dasd_schedule_device_bh(device); 1513a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1514a521b048SStefan Haberland } 1515a521b048SStefan Haberland 15168e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 15178e09f215SStefan Weinhuber { 1518543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 15198e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 15208e09f215SStefan Weinhuber struct dasd_rssd_features *features; 15218e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 15228e09f215SStefan Weinhuber struct ccw1 *ccw; 15238e09f215SStefan Weinhuber int rc; 15248e09f215SStefan Weinhuber 152568d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 152668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 15278e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 15288e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1529c5205f2fSSebastian Ott device, NULL); 15308e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1531b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1532b8ed5dd5SStefan Haberland "allocate initialization request"); 15338e09f215SStefan Weinhuber return PTR_ERR(cqr); 15348e09f215SStefan Weinhuber } 15358e09f215SStefan Weinhuber cqr->startdev = device; 15368e09f215SStefan Weinhuber cqr->memdev = device; 15378e09f215SStefan Weinhuber cqr->block = NULL; 1538eb6e199bSStefan Weinhuber cqr->retries = 256; 15398e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 15408e09f215SStefan Weinhuber 15418e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 15428e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15438e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 15448e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 15458e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 15468e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 15478e09f215SStefan Weinhuber 15488e09f215SStefan Weinhuber ccw = cqr->cpaddr; 15498e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 15508e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 15518e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 1552b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(prssdp); 15538e09f215SStefan Weinhuber 15548e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 15558e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15568e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15578e09f215SStefan Weinhuber 15588e09f215SStefan Weinhuber ccw++; 15598e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15608e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 1561b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(features); 15628e09f215SStefan Weinhuber 15631aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15648e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15658e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15668e09f215SStefan Weinhuber if (rc == 0) { 15678e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15688e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15698e09f215SStefan Weinhuber memcpy(&private->features, features, 15708e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 157168d1e5f0SStefan Weinhuber } else 157268d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 157368d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15758e09f215SStefan Weinhuber return rc; 15768e09f215SStefan Weinhuber } 15778e09f215SStefan Weinhuber 1578c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1579c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1580c729696bSJan Höppner { 1581c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1582c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1583c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1584c729696bSJan Höppner struct dasd_ccw_req *cqr; 1585c729696bSJan Höppner struct ccw1 *ccw; 15869e12e54cSJan Höppner int useglobal; 1587c729696bSJan Höppner int rc; 1588c729696bSJan Höppner 1589c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1590c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1591c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1592c729696bSJan Höppner return 0; 1593c729696bSJan Höppner 15949e12e54cSJan Höppner useglobal = 0; 1595c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1596c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1597c729696bSJan Höppner if (IS_ERR(cqr)) { 1598c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1599c729696bSJan Höppner "Could not allocate initialization request"); 16009e12e54cSJan Höppner mutex_lock(&dasd_vol_info_mutex); 16019e12e54cSJan Höppner useglobal = 1; 16029e12e54cSJan Höppner cqr = &dasd_vol_info_req->cqr; 16039e12e54cSJan Höppner memset(cqr, 0, sizeof(*cqr)); 16049e12e54cSJan Höppner memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 16059e12e54cSJan Höppner cqr->cpaddr = &dasd_vol_info_req->ccw; 16069e12e54cSJan Höppner cqr->data = &dasd_vol_info_req->data; 16079e12e54cSJan Höppner cqr->magic = DASD_ECKD_MAGIC; 1608c729696bSJan Höppner } 1609c729696bSJan Höppner 1610c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1611c729696bSJan Höppner prssdp = cqr->data; 1612c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1613c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1614542e30ceSStefan Haberland prssdp->lss = private->conf.ned->ID; 1615542e30ceSStefan Haberland prssdp->volume = private->conf.ned->unit_addr; 1616c729696bSJan Höppner 1617c729696bSJan Höppner ccw = cqr->cpaddr; 1618c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1619c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1620c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1621b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(prssdp); 1622c729696bSJan Höppner 1623c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1624c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1625c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1626c729696bSJan Höppner 1627c729696bSJan Höppner ccw++; 1628c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1629c729696bSJan Höppner ccw->count = sizeof(*vsq); 1630c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1631b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(vsq); 1632c729696bSJan Höppner 1633c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1634c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1635c729696bSJan Höppner cqr->startdev = device; 1636c729696bSJan Höppner cqr->memdev = device; 1637c729696bSJan Höppner cqr->block = NULL; 1638c729696bSJan Höppner cqr->retries = 256; 1639c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1640c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1641c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1642c729696bSJan Höppner 1643c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1644c729696bSJan Höppner if (rc == 0) { 1645c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1646c729696bSJan Höppner } else { 1647dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1648dd454839SJan Höppner "Reading the volume storage information failed with rc=%d", rc); 1649c729696bSJan Höppner } 1650c729696bSJan Höppner 16519e12e54cSJan Höppner if (useglobal) 16529e12e54cSJan Höppner mutex_unlock(&dasd_vol_info_mutex); 16539e12e54cSJan Höppner else 1654c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1655c729696bSJan Höppner 1656c729696bSJan Höppner return rc; 1657c729696bSJan Höppner } 1658c729696bSJan Höppner 1659c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1660c729696bSJan Höppner { 1661c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1662c729696bSJan Höppner 1663c729696bSJan Höppner return private->vsq.vol_info.ese; 1664c729696bSJan Höppner } 1665c729696bSJan Höppner 1666c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1667c729696bSJan Höppner { 1668c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1669c729696bSJan Höppner 1670c729696bSJan Höppner return private->vsq.extent_pool_id; 1671c729696bSJan Höppner } 1672c729696bSJan Höppner 1673c729696bSJan Höppner /* 1674c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1675c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1676c729696bSJan Höppner * The data for this value is therefore updated on any call. 1677c729696bSJan Höppner */ 1678c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1679c729696bSJan Höppner { 1680c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1681c729696bSJan Höppner int rc; 1682c729696bSJan Höppner 1683c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1684c729696bSJan Höppner 1685c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1686c729696bSJan Höppner } 1687c729696bSJan Höppner 1688c729696bSJan Höppner /* 1689c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1690c729696bSJan Höppner * therefore updated on any call. 1691c729696bSJan Höppner */ 1692c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1693c729696bSJan Höppner { 1694c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1695c729696bSJan Höppner int rc; 1696c729696bSJan Höppner 1697c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1698c729696bSJan Höppner 1699c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1700c729696bSJan Höppner } 1701c729696bSJan Höppner 1702c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1703c729696bSJan Höppner { 1704c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1705c729696bSJan Höppner 1706c729696bSJan Höppner return private->vsq.logical_capacity; 1707c729696bSJan Höppner } 1708c729696bSJan Höppner 17099e12e54cSJan Höppner static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 17109e12e54cSJan Höppner { 17119e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17129e12e54cSJan Höppner struct dasd_device *device; 17139e12e54cSJan Höppner struct dasd_device *base; 17149e12e54cSJan Höppner 17159e12e54cSJan Höppner data = container_of(work, struct ext_pool_exhaust_work_data, worker); 17169e12e54cSJan Höppner device = data->device; 17179e12e54cSJan Höppner base = data->base; 17189e12e54cSJan Höppner 17199e12e54cSJan Höppner if (!base) 17209e12e54cSJan Höppner base = device; 17219e12e54cSJan Höppner if (dasd_eckd_space_configured(base) != 0) { 17229e12e54cSJan Höppner dasd_generic_space_avail(device); 17239e12e54cSJan Höppner } else { 17249e12e54cSJan Höppner dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 17259e12e54cSJan Höppner DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 17269e12e54cSJan Höppner } 17279e12e54cSJan Höppner 17289e12e54cSJan Höppner dasd_put_device(device); 17299e12e54cSJan Höppner kfree(data); 17309e12e54cSJan Höppner } 17319e12e54cSJan Höppner 17329e12e54cSJan Höppner static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 17339e12e54cSJan Höppner struct dasd_ccw_req *cqr) 17349e12e54cSJan Höppner { 17359e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17369e12e54cSJan Höppner 17379e12e54cSJan Höppner data = kzalloc(sizeof(*data), GFP_ATOMIC); 17389e12e54cSJan Höppner if (!data) 17399e12e54cSJan Höppner return -ENOMEM; 17409e12e54cSJan Höppner INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 17419e12e54cSJan Höppner dasd_get_device(device); 17429e12e54cSJan Höppner data->device = device; 17439e12e54cSJan Höppner 17449e12e54cSJan Höppner if (cqr->block) 17459e12e54cSJan Höppner data->base = cqr->block->base; 17469e12e54cSJan Höppner else if (cqr->basedev) 17479e12e54cSJan Höppner data->base = cqr->basedev; 17489e12e54cSJan Höppner else 17499e12e54cSJan Höppner data->base = NULL; 17509e12e54cSJan Höppner 17519e12e54cSJan Höppner schedule_work(&data->worker); 17529e12e54cSJan Höppner 17539e12e54cSJan Höppner return 0; 17549e12e54cSJan Höppner } 17559e12e54cSJan Höppner 1756c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1757c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1758c729696bSJan Höppner { 1759c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1760c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1761c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1762c729696bSJan Höppner int i; 1763c729696bSJan Höppner 1764c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1765c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1766c729696bSJan Höppner if (eps.pool_id == pool_id) { 1767c729696bSJan Höppner memcpy(&private->eps, &eps, 1768c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1769c729696bSJan Höppner } 1770c729696bSJan Höppner } 1771c729696bSJan Höppner } 1772c729696bSJan Höppner 1773c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1774c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1775c729696bSJan Höppner { 1776c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1777c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1778c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1779c729696bSJan Höppner struct dasd_ccw_req *cqr; 1780c729696bSJan Höppner struct ccw1 *ccw; 1781c729696bSJan Höppner int rc; 1782c729696bSJan Höppner 1783c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1784c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1785c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1786c729696bSJan Höppner return 0; 1787c729696bSJan Höppner 1788c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1789c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1790c729696bSJan Höppner if (IS_ERR(cqr)) { 1791c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1792c729696bSJan Höppner "Could not allocate initialization request"); 1793c729696bSJan Höppner return PTR_ERR(cqr); 1794c729696bSJan Höppner } 1795c729696bSJan Höppner 1796c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1797c729696bSJan Höppner prssdp = cqr->data; 1798c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1799c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1800c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1801c729696bSJan Höppner 1802c729696bSJan Höppner ccw = cqr->cpaddr; 1803c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1804c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1805c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1806b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(prssdp); 1807c729696bSJan Höppner 1808c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1809c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1810c729696bSJan Höppner 1811c729696bSJan Höppner ccw++; 1812c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1813c729696bSJan Höppner ccw->count = sizeof(*lcq); 1814c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1815b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(lcq); 1816c729696bSJan Höppner 1817c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1818c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1819c729696bSJan Höppner cqr->startdev = device; 1820c729696bSJan Höppner cqr->memdev = device; 1821c729696bSJan Höppner cqr->block = NULL; 1822c729696bSJan Höppner cqr->retries = 256; 1823c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1824c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1825c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1826c729696bSJan Höppner 1827c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1828c729696bSJan Höppner if (rc == 0) { 1829c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1830c729696bSJan Höppner } else { 1831dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1832dd454839SJan Höppner "Reading the logical configuration failed with rc=%d", rc); 1833c729696bSJan Höppner } 1834c729696bSJan Höppner 1835c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1836c729696bSJan Höppner 1837c729696bSJan Höppner return rc; 1838c729696bSJan Höppner } 1839c729696bSJan Höppner 1840c729696bSJan Höppner /* 1841c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1842c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1843c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1844c729696bSJan Höppner */ 1845c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1846c729696bSJan Höppner { 1847c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1848c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1849c729696bSJan Höppner 1850c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1851c729696bSJan Höppner return 0; 1852c729696bSJan Höppner if (eps.extent_size.size_1G) 1853c729696bSJan Höppner return 1113; 1854c729696bSJan Höppner if (eps.extent_size.size_16M) 1855c729696bSJan Höppner return 21; 1856c729696bSJan Höppner 1857c729696bSJan Höppner return 0; 1858c729696bSJan Höppner } 1859c729696bSJan Höppner 1860c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1861c729696bSJan Höppner { 1862c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1863c729696bSJan Höppner 1864c729696bSJan Höppner return private->eps.warn_thrshld; 1865c729696bSJan Höppner } 1866c729696bSJan Höppner 1867c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1868c729696bSJan Höppner { 1869c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1870c729696bSJan Höppner 1871c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1872c729696bSJan Höppner } 1873c729696bSJan Höppner 1874c729696bSJan Höppner /* 1875c729696bSJan Höppner * Extent Pool out of space 1876c729696bSJan Höppner */ 1877c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1878c729696bSJan Höppner { 1879c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1880c729696bSJan Höppner 1881c729696bSJan Höppner return private->eps.flags.pool_oos; 1882c729696bSJan Höppner } 18838e09f215SStefan Weinhuber 18843d052595SHorst Hummel /* 188540545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 188640545573SHorst Hummel */ 1887f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1888f3eb5384SStefan Weinhuber int enable_pav) 188940545573SHorst Hummel { 189040545573SHorst Hummel struct dasd_ccw_req *cqr; 189140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 189240545573SHorst Hummel struct ccw1 *ccw; 189340545573SHorst Hummel 189468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 189540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1896c5205f2fSSebastian Ott device, NULL); 189740545573SHorst Hummel 189840545573SHorst Hummel if (IS_ERR(cqr)) { 1899fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 190040545573SHorst Hummel "Could not allocate PSF-SSC request"); 190140545573SHorst Hummel return cqr; 190240545573SHorst Hummel } 190340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 190440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1905626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1906f3eb5384SStefan Weinhuber if (enable_pav) { 1907626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 19088e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1909f3eb5384SStefan Weinhuber } 191040545573SHorst Hummel ccw = cqr->cpaddr; 191140545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 1912b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(psf_ssc_data); 191340545573SHorst Hummel ccw->count = 66; 191440545573SHorst Hummel 19158e09f215SStefan Weinhuber cqr->startdev = device; 19168e09f215SStefan Weinhuber cqr->memdev = device; 19178e09f215SStefan Weinhuber cqr->block = NULL; 1918eb6e199bSStefan Weinhuber cqr->retries = 256; 191940545573SHorst Hummel cqr->expires = 10*HZ; 19201aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 192140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 192240545573SHorst Hummel return cqr; 192340545573SHorst Hummel } 192440545573SHorst Hummel 192540545573SHorst Hummel /* 192640545573SHorst Hummel * Perform Subsystem Function. 192740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 192840545573SHorst Hummel * call might change behaviour of DASD devices. 192940545573SHorst Hummel */ 193040545573SHorst Hummel static int 193112d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 193212d7b107SStefan Haberland unsigned long flags) 193340545573SHorst Hummel { 193440545573SHorst Hummel struct dasd_ccw_req *cqr; 193540545573SHorst Hummel int rc; 193640545573SHorst Hummel 1937f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 193840545573SHorst Hummel if (IS_ERR(cqr)) 193940545573SHorst Hummel return PTR_ERR(cqr); 194040545573SHorst Hummel 194112d7b107SStefan Haberland /* 194212d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 194312d7b107SStefan Haberland * the calling function should handle failed requests 194412d7b107SStefan Haberland */ 194512d7b107SStefan Haberland cqr->flags |= flags; 194612d7b107SStefan Haberland 194740545573SHorst Hummel rc = dasd_sleep_on(cqr); 194840545573SHorst Hummel if (!rc) 194940545573SHorst Hummel /* trigger CIO to reprobe devices */ 195040545573SHorst Hummel css_schedule_reprobe(); 195112d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 195212d7b107SStefan Haberland rc = -EAGAIN; 195312d7b107SStefan Haberland 19548e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 195540545573SHorst Hummel return rc; 195640545573SHorst Hummel } 195740545573SHorst Hummel 195840545573SHorst Hummel /* 195940545573SHorst Hummel * Valide storage server of current device. 196040545573SHorst Hummel */ 196112d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 196212d7b107SStefan Haberland unsigned long flags) 196340545573SHorst Hummel { 1964543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1965543691a4SSebastian Ott int enable_pav, rc; 196640545573SHorst Hummel 1967f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1968f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 196912d7b107SStefan Haberland return 0; 197040545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1971f3eb5384SStefan Weinhuber enable_pav = 0; 1972f3eb5384SStefan Weinhuber else 1973f3eb5384SStefan Weinhuber enable_pav = 1; 197412d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1975eb6e199bSStefan Weinhuber 197640545573SHorst Hummel /* may be requested feature is not available on server, 197740545573SHorst Hummel * therefore just report error and go ahead */ 1978b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1979b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 198012d7b107SStefan Haberland return rc; 198140545573SHorst Hummel } 198240545573SHorst Hummel 1983f1633031SStefan Haberland /* 1984f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1985f1633031SStefan Haberland */ 1986f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1987f1633031SStefan Haberland { 1988f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1989f1633031SStefan Haberland kick_validate); 1990ea4da6eaSStefan Haberland unsigned long flags = 0; 1991ea4da6eaSStefan Haberland 1992ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1993ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 199412d7b107SStefan Haberland == -EAGAIN) { 199512d7b107SStefan Haberland /* schedule worker again if failed */ 199612d7b107SStefan Haberland schedule_work(&device->kick_validate); 199712d7b107SStefan Haberland return; 199812d7b107SStefan Haberland } 199912d7b107SStefan Haberland 2000f1633031SStefan Haberland dasd_put_device(device); 2001f1633031SStefan Haberland } 2002f1633031SStefan Haberland 2003f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 2004f1633031SStefan Haberland { 2005f1633031SStefan Haberland dasd_get_device(device); 200625e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 200725e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 200825e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 200925e2cf1cSStefan Haberland dasd_put_device(device); 201025e2cf1cSStefan Haberland return; 201125e2cf1cSStefan Haberland } 2012f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 2013f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 2014f2608cd4SStefan Haberland dasd_put_device(device); 2015f1633031SStefan Haberland } 2016f1633031SStefan Haberland 2017a91ff09dSStefan Haberland /* 2018a91ff09dSStefan Haberland * return if the device is the copy relation primary if a copy relation is active 2019a91ff09dSStefan Haberland */ 2020a91ff09dSStefan Haberland static int dasd_device_is_primary(struct dasd_device *device) 2021a91ff09dSStefan Haberland { 2022a91ff09dSStefan Haberland if (!device->copy) 2023a91ff09dSStefan Haberland return 1; 2024a91ff09dSStefan Haberland 2025a91ff09dSStefan Haberland if (device->copy->active->device == device) 2026a91ff09dSStefan Haberland return 1; 2027a91ff09dSStefan Haberland 2028a91ff09dSStefan Haberland return 0; 2029a91ff09dSStefan Haberland } 2030a91ff09dSStefan Haberland 20312b43bf06SStefan Haberland static int dasd_eckd_alloc_block(struct dasd_device *device) 20322b43bf06SStefan Haberland { 20332b43bf06SStefan Haberland struct dasd_block *block; 20342b43bf06SStefan Haberland struct dasd_uid temp_uid; 20352b43bf06SStefan Haberland 2036a91ff09dSStefan Haberland if (!dasd_device_is_primary(device)) 2037a91ff09dSStefan Haberland return 0; 2038a91ff09dSStefan Haberland 20392b43bf06SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 20402b43bf06SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 20412b43bf06SStefan Haberland block = dasd_alloc_block(); 20422b43bf06SStefan Haberland if (IS_ERR(block)) { 20432b43bf06SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 20442b43bf06SStefan Haberland "could not allocate dasd block structure"); 20452b43bf06SStefan Haberland return PTR_ERR(block); 20462b43bf06SStefan Haberland } 20472b43bf06SStefan Haberland device->block = block; 20482b43bf06SStefan Haberland block->base = device; 20492b43bf06SStefan Haberland } 20502b43bf06SStefan Haberland return 0; 20512b43bf06SStefan Haberland } 20522b43bf06SStefan Haberland 2053a91ff09dSStefan Haberland static bool dasd_eckd_pprc_enabled(struct dasd_device *device) 2054a91ff09dSStefan Haberland { 2055a91ff09dSStefan Haberland struct dasd_eckd_private *private = device->private; 2056a91ff09dSStefan Haberland 2057a91ff09dSStefan Haberland return private->rdc_data.facilities.PPRC_enabled; 2058a91ff09dSStefan Haberland } 2059a91ff09dSStefan Haberland 206040545573SHorst Hummel /* 20613d052595SHorst Hummel * Check device characteristics. 20623d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 20633d052595SHorst Hummel */ 20641da177e4SLinus Torvalds static int 20651da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 20661da177e4SLinus Torvalds { 2067543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 2068f9f8d02fSStefan Haberland int rc, i; 206933b62a30SStefan Weinhuber int readonly; 20707c8faa86SStefan Haberland unsigned long value; 20711da177e4SLinus Torvalds 2072f1633031SStefan Haberland /* setup work queue for validate server*/ 2073f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 207459a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 207559a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 2076f1633031SStefan Haberland 2077454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 2078454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 2079454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 2080454e1fa1SPeter Oberparleiter return -EIO; 2081454e1fa1SPeter Oberparleiter } 2082454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 2083454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 2084454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 2085454e1fa1SPeter Oberparleiter } 208692636b15SSebastian Ott if (!private) { 208792636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 208892636b15SSebastian Ott if (!private) { 2089fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2090fc19f381SStefan Haberland "Allocating memory for private DASD data " 2091fc19f381SStefan Haberland "failed\n"); 20921da177e4SLinus Torvalds return -ENOMEM; 20931da177e4SLinus Torvalds } 2094543691a4SSebastian Ott device->private = private; 209592636b15SSebastian Ott } else { 209692636b15SSebastian Ott memset(private, 0, sizeof(*private)); 20971da177e4SLinus Torvalds } 20981da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 20991da177e4SLinus Torvalds private->init_cqr_status = -1; 21001da177e4SLinus Torvalds /* Set default cache operations. */ 21011da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 21021da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 21031da177e4SLinus Torvalds 210440545573SHorst Hummel /* Read Configuration Data */ 210540545573SHorst Hummel rc = dasd_eckd_read_conf(device); 210640545573SHorst Hummel if (rc) 21078e09f215SStefan Weinhuber goto out_err1; 210840545573SHorst Hummel 2109a521b048SStefan Haberland /* set some default values */ 21107c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 21111f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 2112a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2113a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 21140c1a1474SStefan Haberland device->aq_timeouts = DASD_RETRIES_MAX; 21151f1ee9adSHannes Reinecke 2116542e30ceSStefan Haberland if (private->conf.gneq) { 21177c8faa86SStefan Haberland value = 1; 2118542e30ceSStefan Haberland for (i = 0; i < private->conf.gneq->timeout.value; i++) 21197c8faa86SStefan Haberland value = 10 * value; 2120542e30ceSStefan Haberland value = value * private->conf.gneq->timeout.number; 21217c8faa86SStefan Haberland /* do not accept useless values */ 21227c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 21237c8faa86SStefan Haberland device->default_expires = value; 21247c8faa86SStefan Haberland } 21257c8faa86SStefan Haberland 2126a91ff09dSStefan Haberland /* Read Device Characteristics */ 2127a91ff09dSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 2128a91ff09dSStefan Haberland &private->rdc_data, 64); 2129a91ff09dSStefan Haberland if (rc) { 2130a91ff09dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2131a91ff09dSStefan Haberland "Read device characteristic failed, rc=%d", rc); 2132a91ff09dSStefan Haberland goto out_err1; 2133a91ff09dSStefan Haberland } 2134a91ff09dSStefan Haberland 2135a91ff09dSStefan Haberland /* setup PPRC for device from devmap */ 2136a91ff09dSStefan Haberland rc = dasd_devmap_set_device_copy_relation(device->cdev, 2137a91ff09dSStefan Haberland dasd_eckd_pprc_enabled(device)); 2138a91ff09dSStefan Haberland if (rc) { 2139a91ff09dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2140a91ff09dSStefan Haberland "copy relation setup failed, rc=%d", rc); 2141a91ff09dSStefan Haberland goto out_err1; 2142a91ff09dSStefan Haberland } 2143a91ff09dSStefan Haberland 21442b43bf06SStefan Haberland /* check if block device is needed and allocate in case */ 21452b43bf06SStefan Haberland rc = dasd_eckd_alloc_block(device); 21462b43bf06SStefan Haberland if (rc) 21478e09f215SStefan Weinhuber goto out_err1; 21488e09f215SStefan Weinhuber 2149f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 2150f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 2151f9f8d02fSStefan Haberland if (rc) 21528e09f215SStefan Weinhuber goto out_err2; 2153f9f8d02fSStefan Haberland 215412d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 2155f4ac1d02SStefan Weinhuber 2156f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 2157f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 215840545573SHorst Hummel if (rc) 21598e09f215SStefan Weinhuber goto out_err3; 21608e09f215SStefan Weinhuber 216174e2f211SStefan Haberland dasd_eckd_read_fc_security(device); 216219508b20SJan Höppner dasd_path_create_kobjects(device); 216319508b20SJan Höppner 21648e09f215SStefan Weinhuber /* Read Feature Codes */ 216568d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 216640545573SHorst Hummel 2167c729696bSJan Höppner /* Read Volume Information */ 2168dd454839SJan Höppner dasd_eckd_read_vol_info(device); 2169c729696bSJan Höppner 2170c729696bSJan Höppner /* Read Extent Pool Information */ 2171dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 2172c729696bSJan Höppner 217334cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 217434cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 217534cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 217634cd551aSStefan Haberland "support raw-track access\n"); 217734cd551aSStefan Haberland rc = -EINVAL; 217834cd551aSStefan Haberland goto out_err3; 217934cd551aSStefan Haberland } 218034cd551aSStefan Haberland 2181817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 2182b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2183b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 2184b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 2185b44b0ab3SStefan Weinhuber else 2186b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 2187b44b0ab3SStefan Weinhuber 2188ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 2189ef19298bSStefan Weinhuber 219033b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 219133b62a30SStefan Weinhuber if (readonly) 219233b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 219333b62a30SStefan Weinhuber 2194fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 219533b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 21961da177e4SLinus Torvalds private->rdc_data.dev_type, 21971da177e4SLinus Torvalds private->rdc_data.dev_model, 21981da177e4SLinus Torvalds private->rdc_data.cu_type, 21991da177e4SLinus Torvalds private->rdc_data.cu_model.model, 2200b44b0ab3SStefan Weinhuber private->real_cyl, 22011da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 220233b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 220333b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 22048e09f215SStefan Weinhuber return 0; 22058e09f215SStefan Weinhuber 22068e09f215SStefan Weinhuber out_err3: 22078e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 22088e09f215SStefan Weinhuber out_err2: 22098e09f215SStefan Weinhuber dasd_free_block(device->block); 22108e09f215SStefan Weinhuber device->block = NULL; 22118e09f215SStefan Weinhuber out_err1: 221200b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 2213ac55ad2bSJan Höppner dasd_path_remove_kobjects(device); 22148e09f215SStefan Weinhuber kfree(device->private); 22158e09f215SStefan Weinhuber device->private = NULL; 22163d052595SHorst Hummel return rc; 22171da177e4SLinus Torvalds } 22181da177e4SLinus Torvalds 22198e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 22208e09f215SStefan Weinhuber { 2221543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22224abb08c2SStefan Weinhuber 22237c6553d4SStefan Haberland if (!private) 22247c6553d4SStefan Haberland return; 22257c6553d4SStefan Haberland 22268e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 2227542e30ceSStefan Haberland private->conf.ned = NULL; 2228542e30ceSStefan Haberland private->conf.sneq = NULL; 2229542e30ceSStefan Haberland private->conf.vdsneq = NULL; 2230542e30ceSStefan Haberland private->conf.gneq = NULL; 223100b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 2232ac55ad2bSJan Höppner dasd_path_remove_kobjects(device); 22338e09f215SStefan Weinhuber } 22348e09f215SStefan Weinhuber 22351da177e4SLinus Torvalds static struct dasd_ccw_req * 22361da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 22371da177e4SLinus Torvalds { 2238543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22391da177e4SLinus Torvalds struct eckd_count *count_data; 22401da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 22411da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 22421da177e4SLinus Torvalds struct ccw1 *ccw; 22431da177e4SLinus Torvalds int cplength, datasize; 22441da177e4SLinus Torvalds int i; 22451da177e4SLinus Torvalds 22461da177e4SLinus Torvalds cplength = 8; 22471da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2248c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2249c5205f2fSSebastian Ott NULL); 22501da177e4SLinus Torvalds if (IS_ERR(cqr)) 22511da177e4SLinus Torvalds return cqr; 22521da177e4SLinus Torvalds ccw = cqr->cpaddr; 2253ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2254ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 225545f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 22561da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 22571da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 22581da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22591da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 22601da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22611da177e4SLinus Torvalds 22621da177e4SLinus Torvalds count_data = private->count_area; 22631da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22641da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22651da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22661da177e4SLinus Torvalds ccw->flags = 0; 22671da177e4SLinus Torvalds ccw->count = 8; 2268b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(count_data); 22691da177e4SLinus Torvalds ccw++; 22701da177e4SLinus Torvalds count_data++; 22711da177e4SLinus Torvalds } 22721da177e4SLinus Torvalds 2273ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 22741da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2275ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 22761da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22771da177e4SLinus Torvalds /* Read count ccw. */ 22781da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22791da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22801da177e4SLinus Torvalds ccw->flags = 0; 22811da177e4SLinus Torvalds ccw->count = 8; 2282b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(count_data); 22831da177e4SLinus Torvalds 22848e09f215SStefan Weinhuber cqr->block = NULL; 22858e09f215SStefan Weinhuber cqr->startdev = device; 22868e09f215SStefan Weinhuber cqr->memdev = device; 2287eb6e199bSStefan Weinhuber cqr->retries = 255; 22881aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 22891da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 22909e12e54cSJan Höppner /* Set flags to suppress output for expected errors */ 22919e12e54cSJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22929e12e54cSJan Höppner 22931da177e4SLinus Torvalds return cqr; 22941da177e4SLinus Torvalds } 22951da177e4SLinus Torvalds 2296eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2297eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2298eb6e199bSStefan Weinhuber { 2299eb6e199bSStefan Weinhuber char *sense; 2300eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2301eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2302eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2303eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2304eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2305eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2306eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2307eb6e199bSStefan Weinhuber else 2308eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2309eb6e199bSStefan Weinhuber } else 2310eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2311eb6e199bSStefan Weinhuber } 2312eb6e199bSStefan Weinhuber 23131da177e4SLinus Torvalds /* 23141da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 23151da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 23161da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 23171da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 23181da177e4SLinus Torvalds * for deletion in the meantime). 23191da177e4SLinus Torvalds */ 2320eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2321eb6e199bSStefan Weinhuber void *data) 23221da177e4SLinus Torvalds { 2323543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2324543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 23251da177e4SLinus Torvalds 2326eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 23271da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 23281da177e4SLinus Torvalds dasd_kick_device(device); 23291da177e4SLinus Torvalds } 23301da177e4SLinus Torvalds 2331eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 23321da177e4SLinus Torvalds { 23331da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 23341da177e4SLinus Torvalds 23358e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 23361da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 23371da177e4SLinus Torvalds return PTR_ERR(init_cqr); 23381da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 23391da177e4SLinus Torvalds init_cqr->callback_data = NULL; 23401da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2341eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2342eb6e199bSStefan Weinhuber * devices as special case 2343eb6e199bSStefan Weinhuber */ 2344eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2345eb6e199bSStefan Weinhuber init_cqr->retries = 0; 23461da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 23471da177e4SLinus Torvalds return -EAGAIN; 23481da177e4SLinus Torvalds } 23491da177e4SLinus Torvalds 2350eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 23511da177e4SLinus Torvalds { 2352543691a4SSebastian Ott struct dasd_device *device = block->base; 2353543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 23541da177e4SLinus Torvalds struct eckd_count *count_area; 23551da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 23561da177e4SLinus Torvalds int status, i; 2357eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 23581da177e4SLinus Torvalds 23591da177e4SLinus Torvalds status = private->init_cqr_status; 23601da177e4SLinus Torvalds private->init_cqr_status = -1; 2361eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2362eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2363eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2364eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2365eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2366eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2367eb6e199bSStefan Weinhuber } 2368eb6e199bSStefan Weinhuber 2369e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2370e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2371e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2372e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2373e4dbb0f2SStefan Haberland goto raw; 2374e4dbb0f2SStefan Haberland } 2375e4dbb0f2SStefan Haberland 2376eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2377eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 23781da177e4SLinus Torvalds return -EMEDIUMTYPE; 2379eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2380eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2381eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2382eb6e199bSStefan Weinhuber "of an I/O error\n"); 2383eb6e199bSStefan Weinhuber return -EIO; 23841da177e4SLinus Torvalds } 23851da177e4SLinus Torvalds 23861da177e4SLinus Torvalds private->uses_cdl = 1; 23871da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 23881da177e4SLinus Torvalds count_area = NULL; 23891da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 23901da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 23913bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 23923bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23933bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23943bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 23951da177e4SLinus Torvalds private->uses_cdl = 0; 23961da177e4SLinus Torvalds break; 23971da177e4SLinus Torvalds } 23981da177e4SLinus Torvalds } 23991da177e4SLinus Torvalds if (i == 3) 2400ce6915f5SJan Höppner count_area = &private->count_area[3]; 24011da177e4SLinus Torvalds 24021da177e4SLinus Torvalds if (private->uses_cdl == 0) { 24031da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 24041da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 24051da177e4SLinus Torvalds (private->count_area[i].dl != 24063bc9fef9SStefan Haberland private->count_area[0].dl) || 24073bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 24083bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 24093bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 24101da177e4SLinus Torvalds break; 24111da177e4SLinus Torvalds } 24121da177e4SLinus Torvalds if (i == 5) 24131da177e4SLinus Torvalds count_area = &private->count_area[0]; 24141da177e4SLinus Torvalds } else { 24151da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2416fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2417fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 24181da177e4SLinus Torvalds } 2419e4dbb0f2SStefan Haberland 24201da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 24211da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 24221da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 24238e09f215SStefan Weinhuber block->bp_block = count_area->dl; 24241da177e4SLinus Torvalds } 24258e09f215SStefan Weinhuber if (block->bp_block == 0) { 2426fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2427fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 24281da177e4SLinus Torvalds return -EMEDIUMTYPE; 24291da177e4SLinus Torvalds } 24308e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 24318e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 24328e09f215SStefan Weinhuber block->s2b_shift++; 24331da177e4SLinus Torvalds 24348e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2435e4dbb0f2SStefan Haberland 2436e4dbb0f2SStefan Haberland raw: 24372cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 24381da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 24391da177e4SLinus Torvalds blk_per_trk); 24401da177e4SLinus Torvalds 2441fc19f381SStefan Haberland dev_info(&device->cdev->dev, 24422cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2443fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 24442cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 24451da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 24468e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 24478e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 24481da177e4SLinus Torvalds private->uses_cdl ? 24491da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 24501da177e4SLinus Torvalds 24511da177e4SLinus Torvalds return 0; 24521da177e4SLinus Torvalds } 24531da177e4SLinus Torvalds 24548e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 24551da177e4SLinus Torvalds { 2456543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24571da177e4SLinus Torvalds 24581da177e4SLinus Torvalds if (private->init_cqr_status < 0) 24598e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 24601da177e4SLinus Torvalds else 24618e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 24621da177e4SLinus Torvalds } 24631da177e4SLinus Torvalds 2464d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 24658e09f215SStefan Weinhuber { 24668e09f215SStefan Weinhuber return dasd_alias_add_device(device); 24678e09f215SStefan Weinhuber }; 24688e09f215SStefan Weinhuber 24698e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 24708e09f215SStefan Weinhuber { 2471669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2472669f3765SStefan Haberland dasd_put_device(device); 2473669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2474669f3765SStefan Haberland dasd_put_device(device); 2475669f3765SStefan Haberland 2476d42e1712SStefan Haberland return 0; 2477d42e1712SStefan Haberland }; 2478d42e1712SStefan Haberland 2479daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2480d42e1712SStefan Haberland { 24818e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 24828e09f215SStefan Weinhuber }; 24838e09f215SStefan Weinhuber 24841da177e4SLinus Torvalds static int 24858e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 24861da177e4SLinus Torvalds { 2487543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24881da177e4SLinus Torvalds 24898e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 24901da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 24918e09f215SStefan Weinhuber 0, block->bp_block); 24921da177e4SLinus Torvalds } 24931da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 24941da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 24951da177e4SLinus Torvalds return 0; 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds 24988fd57520SJan Höppner /* 24998fd57520SJan Höppner * Build the TCW request for the format check 25008fd57520SJan Höppner */ 25018fd57520SJan Höppner static struct dasd_ccw_req * 25028fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 25038fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 25048fd57520SJan Höppner int rpt) 25058fd57520SJan Höppner { 25068fd57520SJan Höppner struct dasd_eckd_private *start_priv; 25078fd57520SJan Höppner struct dasd_device *startdev = NULL; 25088fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 25098fd57520SJan Höppner struct dasd_ccw_req *cqr; 25108fd57520SJan Höppner struct itcw *itcw; 25118fd57520SJan Höppner int itcw_size; 25128fd57520SJan Höppner int count; 25138fd57520SJan Höppner int rc; 25148fd57520SJan Höppner int i; 25158fd57520SJan Höppner 25168fd57520SJan Höppner if (enable_pav) 25178fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 25188fd57520SJan Höppner 25198fd57520SJan Höppner if (!startdev) 25208fd57520SJan Höppner startdev = base; 25218fd57520SJan Höppner 25228fd57520SJan Höppner start_priv = startdev->private; 25238fd57520SJan Höppner 25248fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 25258fd57520SJan Höppner 25268fd57520SJan Höppner /* 25278fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 25288fd57520SJan Höppner * calculate the corresponding itcw_size 25298fd57520SJan Höppner */ 25308fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 25318fd57520SJan Höppner 25325e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 25338fd57520SJan Höppner if (IS_ERR(cqr)) 25348fd57520SJan Höppner return cqr; 25358fd57520SJan Höppner 25368fd57520SJan Höppner start_priv->count++; 25378fd57520SJan Höppner 25388fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 25398fd57520SJan Höppner if (IS_ERR(itcw)) { 25408fd57520SJan Höppner rc = -EINVAL; 25418fd57520SJan Höppner goto out_err; 25428fd57520SJan Höppner } 25438fd57520SJan Höppner 25448fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 25458fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 25468fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 25478fd57520SJan Höppner sizeof(struct eckd_count), 25488fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 25498fd57520SJan Höppner if (rc) 25508fd57520SJan Höppner goto out_err; 25518fd57520SJan Höppner 25528fd57520SJan Höppner for (i = 0; i < count; i++) { 25538fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 25548fd57520SJan Höppner sizeof(struct eckd_count)); 25558fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 25568fd57520SJan Höppner rc = -EINVAL; 25578fd57520SJan Höppner goto out_err; 25588fd57520SJan Höppner } 25598fd57520SJan Höppner } 25608fd57520SJan Höppner 25618fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 25628fd57520SJan Höppner itcw_finalize(itcw); 25638fd57520SJan Höppner 25648fd57520SJan Höppner cqr->cpmode = 1; 25658fd57520SJan Höppner cqr->startdev = startdev; 25668fd57520SJan Höppner cqr->memdev = startdev; 25678fd57520SJan Höppner cqr->basedev = base; 25688fd57520SJan Höppner cqr->retries = startdev->default_retries; 25698fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 25708fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 25718fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 25728fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 25738fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 25748fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 25758fd57520SJan Höppner 25768fd57520SJan Höppner return cqr; 25778fd57520SJan Höppner 25788fd57520SJan Höppner out_err: 25798fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 25808fd57520SJan Höppner 25818fd57520SJan Höppner return ERR_PTR(rc); 25828fd57520SJan Höppner } 25838fd57520SJan Höppner 25848fd57520SJan Höppner /* 25858fd57520SJan Höppner * Build the CCW request for the format check 25868fd57520SJan Höppner */ 25878fd57520SJan Höppner static struct dasd_ccw_req * 25888fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 25898fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 25908fd57520SJan Höppner { 25918fd57520SJan Höppner struct dasd_eckd_private *start_priv; 25928fd57520SJan Höppner struct dasd_eckd_private *base_priv; 25938fd57520SJan Höppner struct dasd_device *startdev = NULL; 25948fd57520SJan Höppner struct dasd_ccw_req *cqr; 25958fd57520SJan Höppner struct ccw1 *ccw; 25968fd57520SJan Höppner void *data; 25978fd57520SJan Höppner int cplength, datasize; 25988fd57520SJan Höppner int use_prefix; 25998fd57520SJan Höppner int count; 26008fd57520SJan Höppner int i; 26018fd57520SJan Höppner 26028fd57520SJan Höppner if (enable_pav) 26038fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 26048fd57520SJan Höppner 26058fd57520SJan Höppner if (!startdev) 26068fd57520SJan Höppner startdev = base; 26078fd57520SJan Höppner 26088fd57520SJan Höppner start_priv = startdev->private; 26098fd57520SJan Höppner base_priv = base->private; 26108fd57520SJan Höppner 26118fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 26128fd57520SJan Höppner 26138fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 26148fd57520SJan Höppner 26158fd57520SJan Höppner if (use_prefix) { 26168fd57520SJan Höppner cplength = 1; 26178fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 26188fd57520SJan Höppner } else { 26198fd57520SJan Höppner cplength = 2; 26208fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 26218fd57520SJan Höppner sizeof(struct LO_eckd_data); 26228fd57520SJan Höppner } 26238fd57520SJan Höppner cplength += count; 26248fd57520SJan Höppner 26255e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 26268fd57520SJan Höppner if (IS_ERR(cqr)) 26278fd57520SJan Höppner return cqr; 26288fd57520SJan Höppner 26298fd57520SJan Höppner start_priv->count++; 26308fd57520SJan Höppner data = cqr->data; 26318fd57520SJan Höppner ccw = cqr->cpaddr; 26328fd57520SJan Höppner 26338fd57520SJan Höppner if (use_prefix) { 26348fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 26358fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 26368fd57520SJan Höppner count, 0, 0); 26378fd57520SJan Höppner } else { 26388fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 263945f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 26408fd57520SJan Höppner 26418fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 26428fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 26438fd57520SJan Höppner 26448fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 26458fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 26468fd57520SJan Höppner } 26478fd57520SJan Höppner 26488fd57520SJan Höppner for (i = 0; i < count; i++) { 26498fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 26508fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 26518fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 26528fd57520SJan Höppner ccw->count = 8; 2653b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(fmt_buffer); 26548fd57520SJan Höppner ccw++; 26558fd57520SJan Höppner fmt_buffer++; 26568fd57520SJan Höppner } 26578fd57520SJan Höppner 26588fd57520SJan Höppner cqr->startdev = startdev; 26598fd57520SJan Höppner cqr->memdev = startdev; 26608fd57520SJan Höppner cqr->basedev = base; 26618fd57520SJan Höppner cqr->retries = DASD_RETRIES; 26628fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 26638fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 26648fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 26658fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 26668fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 26678fd57520SJan Höppner 26688fd57520SJan Höppner return cqr; 26698fd57520SJan Höppner } 26708fd57520SJan Höppner 26711da177e4SLinus Torvalds static struct dasd_ccw_req * 26725e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 26735e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 26741da177e4SLinus Torvalds { 2675d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2676d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 26771da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 26781da177e4SLinus Torvalds struct eckd_count *ect; 2679d42e1712SStefan Haberland struct ch_t address; 26801da177e4SLinus Torvalds struct ccw1 *ccw; 26811da177e4SLinus Torvalds void *data; 2682b44b0ab3SStefan Weinhuber int rpt; 26831da177e4SLinus Torvalds int cplength, datasize; 2684d42e1712SStefan Haberland int i, j; 2685f9a28f7bSJean-Baptiste Joret int intensity = 0; 2686f9a28f7bSJean-Baptiste Joret int r0_perm; 2687d42e1712SStefan Haberland int nr_tracks; 268818d6624eSStefan Haberland int use_prefix; 26891da177e4SLinus Torvalds 2690a94fa154SStefan Haberland if (enable_pav) 2691d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 269229b8dd9dSStefan Haberland 2693d42e1712SStefan Haberland if (!startdev) 2694d42e1712SStefan Haberland startdev = base; 26951da177e4SLinus Torvalds 2696543691a4SSebastian Ott start_priv = startdev->private; 2697543691a4SSebastian Ott base_priv = base->private; 2698d42e1712SStefan Haberland 2699d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2700d42e1712SStefan Haberland 2701d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 27021da177e4SLinus Torvalds 27031da177e4SLinus Torvalds /* 27041da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 27051da177e4SLinus Torvalds * Bit 0: write record zero 27061da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 27071da177e4SLinus Torvalds * Bit 2: invalidate tracks 27081da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2709f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 27101da177e4SLinus Torvalds * Only some bit combinations do make sense. 27111da177e4SLinus Torvalds */ 2712f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2713f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2714f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2715f9a28f7bSJean-Baptiste Joret } else { 2716f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2717f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2718f9a28f7bSJean-Baptiste Joret } 2719d42e1712SStefan Haberland 272018d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 272118d6624eSStefan Haberland 2722f9a28f7bSJean-Baptiste Joret switch (intensity) { 27231da177e4SLinus Torvalds case 0x00: /* Normal format */ 27241da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2725d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 272618d6624eSStefan Haberland if (use_prefix) 2727d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27281da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2729d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 273018d6624eSStefan Haberland else 273118d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 273218d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 273318d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 27341da177e4SLinus Torvalds break; 27351da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 27361da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2737d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 273818d6624eSStefan Haberland if (use_prefix) 2739d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27401da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 27411da177e4SLinus Torvalds sizeof(struct eckd_count) + 2742d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 274318d6624eSStefan Haberland else 274418d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 274518d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 274618d6624eSStefan Haberland sizeof(struct eckd_count) + 274718d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 27481da177e4SLinus Torvalds break; 27491da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 27501da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 27511da177e4SLinus Torvalds cplength = 3; 275218d6624eSStefan Haberland if (use_prefix) 2753d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27541da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 27551da177e4SLinus Torvalds sizeof(struct eckd_count); 275618d6624eSStefan Haberland else 275718d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 275818d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 275918d6624eSStefan Haberland sizeof(struct eckd_count); 27601da177e4SLinus Torvalds break; 27611da177e4SLinus Torvalds default: 2762d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2763d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2764d42e1712SStefan Haberland fdata->intensity); 27651da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 27661da177e4SLinus Torvalds } 27675e2b17e7SJan Höppner 27685e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 27691da177e4SLinus Torvalds if (IS_ERR(fcp)) 27701da177e4SLinus Torvalds return fcp; 27711da177e4SLinus Torvalds 2772d42e1712SStefan Haberland start_priv->count++; 27731da177e4SLinus Torvalds data = fcp->data; 27741da177e4SLinus Torvalds ccw = fcp->cpaddr; 27751da177e4SLinus Torvalds 2776f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 27771da177e4SLinus Torvalds case 0x00: /* Normal format. */ 277818d6624eSStefan Haberland if (use_prefix) { 2779d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2780d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2781d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2782f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2783f9a28f7bSJean-Baptiste Joret if (r0_perm) 2784d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2785d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2786d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 278718d6624eSStefan Haberland } else { 278818d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 278918d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 279045f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 279118d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 279218d6624eSStefan Haberland if (r0_perm) 279318d6624eSStefan Haberland ((struct DE_eckd_data *) data) 279418d6624eSStefan Haberland ->ga_extended |= 0x04; 279518d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 279618d6624eSStefan Haberland } 27971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27981da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2799d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2800d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 28011da177e4SLinus Torvalds fdata->blksize); 28021da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 28031da177e4SLinus Torvalds break; 28041da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 280518d6624eSStefan Haberland if (use_prefix) { 2806d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2807d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 28081da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2809d42e1712SStefan Haberland base, startdev); 2810d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 281118d6624eSStefan Haberland } else { 281218d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 281318d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 281445f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 281518d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 281618d6624eSStefan Haberland } 28171da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28181da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2819d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2820d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2821d42e1712SStefan Haberland base->block->bp_block); 28221da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 28231da177e4SLinus Torvalds break; 28241da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 282518d6624eSStefan Haberland if (use_prefix) { 2826d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2827d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2828d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2829d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 283018d6624eSStefan Haberland } else { 283118d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 283218d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 283345f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 283418d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 283518d6624eSStefan Haberland } 28361da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28371da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 28381da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2839d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 28401da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 28411da177e4SLinus Torvalds break; 28421da177e4SLinus Torvalds } 2843d42e1712SStefan Haberland 2844d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2845d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2846d42e1712SStefan Haberland set_ch_t(&address, 2847d42e1712SStefan Haberland (fdata->start_unit + j) / 2848d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2849d42e1712SStefan Haberland (fdata->start_unit + j) % 2850d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2851f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 28521da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28531da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2854b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2855b44b0ab3SStefan Weinhuber ect->head = address.head; 28561da177e4SLinus Torvalds ect->record = 0; 28571da177e4SLinus Torvalds ect->kl = 0; 28581da177e4SLinus Torvalds ect->dl = 8; 28591da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28601da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 28611da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28621da177e4SLinus Torvalds ccw->count = 8; 2863b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(ect); 28641da177e4SLinus Torvalds ccw++; 28651da177e4SLinus Torvalds } 2866f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 28671da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28681da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2869b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2870b44b0ab3SStefan Weinhuber ect->head = address.head; 28711da177e4SLinus Torvalds ect->record = 1; 28721da177e4SLinus Torvalds ect->kl = 0; 28731da177e4SLinus Torvalds ect->dl = 0; 28741da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28751da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 28761da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28771da177e4SLinus Torvalds ccw->count = 8; 2878b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(ect); 28791da177e4SLinus Torvalds } else { /* write remaining records */ 28801da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 28811da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28821da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2883b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2884b44b0ab3SStefan Weinhuber ect->head = address.head; 28851da177e4SLinus Torvalds ect->record = i + 1; 28861da177e4SLinus Torvalds ect->kl = 0; 28871da177e4SLinus Torvalds ect->dl = fdata->blksize; 2888d42e1712SStefan Haberland /* 2889d42e1712SStefan Haberland * Check for special tracks 0-1 2890d42e1712SStefan Haberland * when formatting CDL 2891d42e1712SStefan Haberland */ 2892f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 289346d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 28941da177e4SLinus Torvalds if (i < 3) { 28951da177e4SLinus Torvalds ect->kl = 4; 28961da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 28971da177e4SLinus Torvalds } 28981da177e4SLinus Torvalds } 2899f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 290046d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 29011da177e4SLinus Torvalds ect->kl = 44; 29021da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 29031da177e4SLinus Torvalds } 29041da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2905d42e1712SStefan Haberland if (i != 0 || j == 0) 2906d42e1712SStefan Haberland ccw->cmd_code = 2907d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2908d42e1712SStefan Haberland else 2909d42e1712SStefan Haberland ccw->cmd_code = 2910d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 29111da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 29121da177e4SLinus Torvalds ccw->count = 8; 2913b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(ect); 29141da177e4SLinus Torvalds ccw++; 29151da177e4SLinus Torvalds } 29161da177e4SLinus Torvalds } 2917d42e1712SStefan Haberland } 2918d42e1712SStefan Haberland 2919d42e1712SStefan Haberland fcp->startdev = startdev; 2920d42e1712SStefan Haberland fcp->memdev = startdev; 292129b8dd9dSStefan Haberland fcp->basedev = base; 2922eb6e199bSStefan Weinhuber fcp->retries = 256; 2923d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 29241aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 29251da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2926d42e1712SStefan Haberland 29271da177e4SLinus Torvalds return fcp; 29281da177e4SLinus Torvalds } 29291da177e4SLinus Torvalds 2930570d237cSJan Höppner /* 2931570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2932570d237cSJan Höppner */ 2933570d237cSJan Höppner static struct dasd_ccw_req * 2934570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 29358fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 29368fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2937d42e1712SStefan Haberland { 29388fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 29398fd57520SJan Höppner 29408fd57520SJan Höppner if (!fmt_buffer) { 29415e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 29428fd57520SJan Höppner } else { 29438fd57520SJan Höppner if (tpm) 29448fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 29458fd57520SJan Höppner enable_pav, 29468fd57520SJan Höppner fmt_buffer, rpt); 29478fd57520SJan Höppner else 29488fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 29498fd57520SJan Höppner fmt_buffer, rpt); 29508fd57520SJan Höppner } 29518fd57520SJan Höppner 29528fd57520SJan Höppner return ccw_req; 2953570d237cSJan Höppner } 2954570d237cSJan Höppner 2955570d237cSJan Höppner /* 2956570d237cSJan Höppner * Sanity checks on format_data 2957570d237cSJan Höppner */ 2958570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2959570d237cSJan Höppner struct format_data_t *fdata) 2960570d237cSJan Höppner { 2961543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2962d42e1712SStefan Haberland 2963d42e1712SStefan Haberland if (fdata->start_unit >= 2964d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2965d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2966d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2967d42e1712SStefan Haberland fdata->start_unit); 2968d42e1712SStefan Haberland return -EINVAL; 2969d42e1712SStefan Haberland } 2970d42e1712SStefan Haberland if (fdata->stop_unit >= 2971d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2972d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2973d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2974d42e1712SStefan Haberland fdata->stop_unit); 2975d42e1712SStefan Haberland return -EINVAL; 2976d42e1712SStefan Haberland } 2977d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2978d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2979d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2980d42e1712SStefan Haberland fdata->start_unit); 2981d42e1712SStefan Haberland return -EINVAL; 2982d42e1712SStefan Haberland } 2983d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2984d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2985d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2986d42e1712SStefan Haberland fdata->blksize); 2987d42e1712SStefan Haberland return -EINVAL; 2988d42e1712SStefan Haberland } 2989570d237cSJan Höppner return 0; 2990570d237cSJan Höppner } 2991570d237cSJan Höppner 2992570d237cSJan Höppner /* 2993570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2994570d237cSJan Höppner */ 2995570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2996570d237cSJan Höppner struct format_data_t *fdata, 29978fd57520SJan Höppner int enable_pav, int tpm, 29988fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 29998fd57520SJan Höppner struct irb *irb) 3000570d237cSJan Höppner { 3001543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 3002570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 3003570d237cSJan Höppner struct list_head format_queue; 3004570d237cSJan Höppner struct dasd_device *device; 30058fd57520SJan Höppner char *sense = NULL; 3006570d237cSJan Höppner int old_start, old_stop, format_step; 3007570d237cSJan Höppner int step, retry; 3008570d237cSJan Höppner int rc; 3009570d237cSJan Höppner 3010570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 3011570d237cSJan Höppner if (rc) 3012570d237cSJan Höppner return rc; 3013d42e1712SStefan Haberland 3014d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 3015d42e1712SStefan Haberland 301646d1c03cSJan Höppner old_start = fdata->start_unit; 301729b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 3018d42e1712SStefan Haberland 30198fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 30208fd57520SJan Höppner /* Command Mode / Format Check */ 30218fd57520SJan Höppner format_step = 1; 30228fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 30238fd57520SJan Höppner /* Transport Mode / Format Check */ 30248fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 30258fd57520SJan Höppner } else { 30268fd57520SJan Höppner /* Normal Formatting */ 30278fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 30288fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 30298fd57520SJan Höppner } 30308fd57520SJan Höppner 303146d1c03cSJan Höppner do { 303246d1c03cSJan Höppner retry = 0; 3033d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 3034d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 303546d1c03cSJan Höppner if (step > format_step) { 303646d1c03cSJan Höppner fdata->stop_unit = 303746d1c03cSJan Höppner fdata->start_unit + format_step - 1; 303846d1c03cSJan Höppner } 3039d42e1712SStefan Haberland 3040570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 30418fd57520SJan Höppner enable_pav, tpm, 30428fd57520SJan Höppner fmt_buffer, rpt); 3043d42e1712SStefan Haberland if (IS_ERR(cqr)) { 304446d1c03cSJan Höppner rc = PTR_ERR(cqr); 304546d1c03cSJan Höppner if (rc == -ENOMEM) { 304646d1c03cSJan Höppner if (list_empty(&format_queue)) 304746d1c03cSJan Höppner goto out; 3048d42e1712SStefan Haberland /* 304946d1c03cSJan Höppner * not enough memory available, start 305046d1c03cSJan Höppner * requests retry after first requests 305146d1c03cSJan Höppner * were finished 3052d42e1712SStefan Haberland */ 305346d1c03cSJan Höppner retry = 1; 305446d1c03cSJan Höppner break; 3055d42e1712SStefan Haberland } 305646d1c03cSJan Höppner goto out_err; 305746d1c03cSJan Höppner } 305846d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 3059d42e1712SStefan Haberland 30608fd57520SJan Höppner if (fmt_buffer) { 30618fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 30628fd57520SJan Höppner fmt_buffer += rpt * step; 30638fd57520SJan Höppner } 3064d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 3065d42e1712SStefan Haberland fdata->stop_unit = old_stop; 3066d42e1712SStefan Haberland } 3067d42e1712SStefan Haberland 306846d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 3069d42e1712SStefan Haberland 307046d1c03cSJan Höppner out_err: 3071d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 3072d42e1712SStefan Haberland device = cqr->startdev; 3073543691a4SSebastian Ott private = device->private; 30748fd57520SJan Höppner 30758fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 30768fd57520SJan Höppner /* 30778fd57520SJan Höppner * Only get sense data if called by format 30788fd57520SJan Höppner * check 30798fd57520SJan Höppner */ 30808fd57520SJan Höppner if (fmt_buffer && irb) { 30818fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 30828fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 30838fd57520SJan Höppner } 3084d42e1712SStefan Haberland rc = -EIO; 30858fd57520SJan Höppner } 3086d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 30875e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 3088d42e1712SStefan Haberland private->count--; 3089d42e1712SStefan Haberland } 3090d42e1712SStefan Haberland 30918fd57520SJan Höppner if (rc && rc != -EIO) 309246d1c03cSJan Höppner goto out; 30938fd57520SJan Höppner if (rc == -EIO) { 30948fd57520SJan Höppner /* 30958fd57520SJan Höppner * In case fewer than the expected records are on the 30968fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 30978fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 30988fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 30998fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 31008fd57520SJan Höppner * and continue. 31018fd57520SJan Höppner */ 31028fd57520SJan Höppner if (sense && 31038fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 31048fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 31058fd57520SJan Höppner retry = 1; 31068fd57520SJan Höppner else 31078fd57520SJan Höppner goto out; 31088fd57520SJan Höppner } 310929b8dd9dSStefan Haberland 311046d1c03cSJan Höppner } while (retry); 311146d1c03cSJan Höppner 311246d1c03cSJan Höppner out: 311346d1c03cSJan Höppner fdata->start_unit = old_start; 311446d1c03cSJan Höppner fdata->stop_unit = old_stop; 3115d42e1712SStefan Haberland 3116d42e1712SStefan Haberland return rc; 3117d42e1712SStefan Haberland } 3118d42e1712SStefan Haberland 3119570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 3120570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 3121570d237cSJan Höppner { 31228fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 31238fd57520SJan Höppner 0, NULL); 31248fd57520SJan Höppner } 31258fd57520SJan Höppner 31265e6bdd37SStefan Haberland static bool test_and_set_format_track(struct dasd_format_entry *to_format, 312771f38716SStefan Haberland struct dasd_ccw_req *cqr) 31285e6bdd37SStefan Haberland { 312971f38716SStefan Haberland struct dasd_block *block = cqr->block; 31305e6bdd37SStefan Haberland struct dasd_format_entry *format; 31315e6bdd37SStefan Haberland unsigned long flags; 31325e6bdd37SStefan Haberland bool rc = false; 31335e6bdd37SStefan Haberland 31345e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 313571f38716SStefan Haberland if (cqr->trkcount != atomic_read(&block->trkcount)) { 313671f38716SStefan Haberland /* 313771f38716SStefan Haberland * The number of formatted tracks has changed after request 313871f38716SStefan Haberland * start and we can not tell if the current track was involved. 313971f38716SStefan Haberland * To avoid data corruption treat it as if the current track is 314071f38716SStefan Haberland * involved 314171f38716SStefan Haberland */ 314271f38716SStefan Haberland rc = true; 314371f38716SStefan Haberland goto out; 314471f38716SStefan Haberland } 31455e6bdd37SStefan Haberland list_for_each_entry(format, &block->format_list, list) { 31465e6bdd37SStefan Haberland if (format->track == to_format->track) { 31475e6bdd37SStefan Haberland rc = true; 31485e6bdd37SStefan Haberland goto out; 31495e6bdd37SStefan Haberland } 31505e6bdd37SStefan Haberland } 31515e6bdd37SStefan Haberland list_add_tail(&to_format->list, &block->format_list); 31525e6bdd37SStefan Haberland 31535e6bdd37SStefan Haberland out: 31545e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 31555e6bdd37SStefan Haberland return rc; 31565e6bdd37SStefan Haberland } 31575e6bdd37SStefan Haberland 31585e6bdd37SStefan Haberland static void clear_format_track(struct dasd_format_entry *format, 31595e6bdd37SStefan Haberland struct dasd_block *block) 31605e6bdd37SStefan Haberland { 31615e6bdd37SStefan Haberland unsigned long flags; 31625e6bdd37SStefan Haberland 31635e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 316471f38716SStefan Haberland atomic_inc(&block->trkcount); 31655e6bdd37SStefan Haberland list_del_init(&format->list); 31665e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 31675e6bdd37SStefan Haberland } 31685e6bdd37SStefan Haberland 31698fd57520SJan Höppner /* 31705e2b17e7SJan Höppner * Callback function to free ESE format requests. 31715e2b17e7SJan Höppner */ 31725e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 31735e2b17e7SJan Höppner { 31745e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 31755e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 31765e6bdd37SStefan Haberland struct dasd_format_entry *format = data; 31775e2b17e7SJan Höppner 31785e6bdd37SStefan Haberland clear_format_track(format, cqr->basedev->block); 31795e2b17e7SJan Höppner private->count--; 31805e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 31815e2b17e7SJan Höppner } 31825e2b17e7SJan Höppner 31835e2b17e7SJan Höppner static struct dasd_ccw_req * 31845e6bdd37SStefan Haberland dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 31855e6bdd37SStefan Haberland struct irb *irb) 31865e2b17e7SJan Höppner { 31875e2b17e7SJan Höppner struct dasd_eckd_private *private; 31885e6bdd37SStefan Haberland struct dasd_format_entry *format; 31895e2b17e7SJan Höppner struct format_data_t fdata; 31905e2b17e7SJan Höppner unsigned int recs_per_trk; 31915e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 31925e2b17e7SJan Höppner struct dasd_device *base; 31935e2b17e7SJan Höppner struct dasd_block *block; 31945e2b17e7SJan Höppner unsigned int blksize; 31955e2b17e7SJan Höppner struct request *req; 31965e2b17e7SJan Höppner sector_t first_trk; 31975e2b17e7SJan Höppner sector_t last_trk; 31985e6bdd37SStefan Haberland sector_t curr_trk; 31995e2b17e7SJan Höppner int rc; 32005e2b17e7SJan Höppner 32015b53a405SStefan Haberland req = dasd_get_callback_data(cqr); 32025e6bdd37SStefan Haberland block = cqr->block; 32035e6bdd37SStefan Haberland base = block->base; 32045e2b17e7SJan Höppner private = base->private; 32055e2b17e7SJan Höppner blksize = block->bp_block; 32065e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32075e6bdd37SStefan Haberland format = &startdev->format_entry; 32085e2b17e7SJan Höppner 32095e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 32105e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 32115e2b17e7SJan Höppner last_trk = 32125e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 32135e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 32145e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 32155e6bdd37SStefan Haberland if (rc) 32165e6bdd37SStefan Haberland return ERR_PTR(rc); 32175e2b17e7SJan Höppner 32185e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 32195e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, startdev, 32205e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 32215e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 32225e6bdd37SStefan Haberland return ERR_PTR(-EINVAL); 32235e6bdd37SStefan Haberland } 32245e6bdd37SStefan Haberland format->track = curr_trk; 32255e6bdd37SStefan Haberland /* test if track is already in formatting by another thread */ 322671f38716SStefan Haberland if (test_and_set_format_track(format, cqr)) { 322771f38716SStefan Haberland /* this is no real error so do not count down retries */ 322871f38716SStefan Haberland cqr->retries++; 32295e6bdd37SStefan Haberland return ERR_PTR(-EEXIST); 323071f38716SStefan Haberland } 32315e6bdd37SStefan Haberland 32325e6bdd37SStefan Haberland fdata.start_unit = curr_trk; 32335e6bdd37SStefan Haberland fdata.stop_unit = curr_trk; 32345e2b17e7SJan Höppner fdata.blksize = blksize; 32355e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 32365e2b17e7SJan Höppner 32375e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 32385e2b17e7SJan Höppner if (rc) 32395e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 32405e2b17e7SJan Höppner 32415e2b17e7SJan Höppner /* 32425e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 32435e2b17e7SJan Höppner * the former startdev. 32445e2b17e7SJan Höppner */ 32455e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 32465e2b17e7SJan Höppner if (IS_ERR(fcqr)) 32475e2b17e7SJan Höppner return fcqr; 32485e2b17e7SJan Höppner 32495e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 32505e6bdd37SStefan Haberland fcqr->callback_data = (void *) format; 32515e2b17e7SJan Höppner 32525e2b17e7SJan Höppner return fcqr; 32535e2b17e7SJan Höppner } 32545e2b17e7SJan Höppner 32555e2b17e7SJan Höppner /* 32565e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 32575e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 32585e6bdd37SStefan Haberland * 32595e6bdd37SStefan Haberland * The first unformatted track is the one that got the NRF error, the address is 32605e6bdd37SStefan Haberland * encoded in the sense data. 32615e6bdd37SStefan Haberland * 32625e6bdd37SStefan Haberland * All tracks before have returned valid data and should not be touched. 32635e6bdd37SStefan Haberland * All tracks after the unformatted track might be formatted or not. This is 32645e6bdd37SStefan Haberland * currently not known, remember the processed data and return the remainder of 32655e6bdd37SStefan Haberland * the request to the blocklayer in __dasd_cleanup_cqr(). 32665e2b17e7SJan Höppner */ 32675e6bdd37SStefan Haberland static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 32685e2b17e7SJan Höppner { 32695e6bdd37SStefan Haberland struct dasd_eckd_private *private; 32705e6bdd37SStefan Haberland sector_t first_trk, last_trk; 32715e6bdd37SStefan Haberland sector_t first_blk, last_blk; 32725e2b17e7SJan Höppner unsigned int blksize, off; 32735e6bdd37SStefan Haberland unsigned int recs_per_trk; 32745e2b17e7SJan Höppner struct dasd_device *base; 32755e2b17e7SJan Höppner struct req_iterator iter; 32765e6bdd37SStefan Haberland struct dasd_block *block; 32775e6bdd37SStefan Haberland unsigned int skip_block; 32785e6bdd37SStefan Haberland unsigned int blk_count; 32795e2b17e7SJan Höppner struct request *req; 32805e2b17e7SJan Höppner struct bio_vec bv; 32815e6bdd37SStefan Haberland sector_t curr_trk; 32825e6bdd37SStefan Haberland sector_t end_blk; 32835e2b17e7SJan Höppner char *dst; 32845e6bdd37SStefan Haberland int rc; 32855e2b17e7SJan Höppner 32865e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 32875e2b17e7SJan Höppner base = cqr->block->base; 32885e2b17e7SJan Höppner blksize = base->block->bp_block; 32895e6bdd37SStefan Haberland block = cqr->block; 32905e6bdd37SStefan Haberland private = base->private; 32915e6bdd37SStefan Haberland skip_block = 0; 32925e6bdd37SStefan Haberland blk_count = 0; 32935e6bdd37SStefan Haberland 32945e6bdd37SStefan Haberland recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32955e6bdd37SStefan Haberland first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 32965e6bdd37SStefan Haberland sector_div(first_trk, recs_per_trk); 32975e6bdd37SStefan Haberland last_trk = last_blk = 32985e6bdd37SStefan Haberland (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 32995e6bdd37SStefan Haberland sector_div(last_trk, recs_per_trk); 33005e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 33015e6bdd37SStefan Haberland if (rc) 33025e6bdd37SStefan Haberland return rc; 33035e6bdd37SStefan Haberland 33045e6bdd37SStefan Haberland /* sanity check if the current track from sense data is valid */ 33055e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 33065e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, base, 33075e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 33085e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 33095e6bdd37SStefan Haberland return -EINVAL; 33105e6bdd37SStefan Haberland } 33115e6bdd37SStefan Haberland 33125e6bdd37SStefan Haberland /* 33135e6bdd37SStefan Haberland * if not the first track got the NRF error we have to skip over valid 33145e6bdd37SStefan Haberland * blocks 33155e6bdd37SStefan Haberland */ 33165e6bdd37SStefan Haberland if (curr_trk != first_trk) 33175e6bdd37SStefan Haberland skip_block = curr_trk * recs_per_trk - first_blk; 33185e6bdd37SStefan Haberland 33195e6bdd37SStefan Haberland /* we have no information beyond the current track */ 33205e6bdd37SStefan Haberland end_blk = (curr_trk + 1) * recs_per_trk; 33215e2b17e7SJan Höppner 33225e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 3323bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 33245e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 33255e6bdd37SStefan Haberland if (first_blk + blk_count >= end_blk) { 33265e6bdd37SStefan Haberland cqr->proc_bytes = blk_count * blksize; 33275e6bdd37SStefan Haberland return 0; 33285e6bdd37SStefan Haberland } 3329cd68c48eSJan Höppner if (dst && !skip_block) 33305e2b17e7SJan Höppner memset(dst, 0, blksize); 3331cd68c48eSJan Höppner else 33325e6bdd37SStefan Haberland skip_block--; 3333cd68c48eSJan Höppner dst += blksize; 33345e6bdd37SStefan Haberland blk_count++; 33355e2b17e7SJan Höppner } 33365e2b17e7SJan Höppner } 33375e6bdd37SStefan Haberland return 0; 33385e2b17e7SJan Höppner } 33395e2b17e7SJan Höppner 33405e2b17e7SJan Höppner /* 33418fd57520SJan Höppner * Helper function to count consecutive records of a single track. 33428fd57520SJan Höppner */ 33438fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 33448fd57520SJan Höppner int max) 33458fd57520SJan Höppner { 33468fd57520SJan Höppner int head; 33478fd57520SJan Höppner int i; 33488fd57520SJan Höppner 33498fd57520SJan Höppner head = fmt_buffer[start].head; 33508fd57520SJan Höppner 33518fd57520SJan Höppner /* 33528fd57520SJan Höppner * There are 3 conditions where we stop counting: 33538fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 33548fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 33558fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 33568fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 33578fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 33588fd57520SJan Höppner * record will be 0 then) 33598fd57520SJan Höppner */ 33608fd57520SJan Höppner for (i = start; i < max; i++) { 33618fd57520SJan Höppner if (i > start) { 33628fd57520SJan Höppner if ((fmt_buffer[i].head == head && 33638fd57520SJan Höppner fmt_buffer[i].record == 1) || 33648fd57520SJan Höppner fmt_buffer[i].head != head || 33658fd57520SJan Höppner fmt_buffer[i].record == 0) 33668fd57520SJan Höppner break; 33678fd57520SJan Höppner } 33688fd57520SJan Höppner } 33698fd57520SJan Höppner 33708fd57520SJan Höppner return i - start; 33718fd57520SJan Höppner } 33728fd57520SJan Höppner 33738fd57520SJan Höppner /* 33748fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 33758fd57520SJan Höppner * record ids, and key length are compared with expected data. 33768fd57520SJan Höppner * 33778fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 33788fd57520SJan Höppner * additional information, depending on the error. 33798fd57520SJan Höppner */ 33808fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 33818fd57520SJan Höppner struct format_check_t *cdata, 33828fd57520SJan Höppner int rpt_max, int rpt_exp, 33838fd57520SJan Höppner int trk_per_cyl, int tpm) 33848fd57520SJan Höppner { 33858fd57520SJan Höppner struct ch_t geo; 33868fd57520SJan Höppner int max_entries; 33878fd57520SJan Höppner int count = 0; 33888fd57520SJan Höppner int trkcount; 33898fd57520SJan Höppner int blksize; 33908fd57520SJan Höppner int pos = 0; 33918fd57520SJan Höppner int i, j; 33928fd57520SJan Höppner int kl; 33938fd57520SJan Höppner 33948fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 33958fd57520SJan Höppner max_entries = trkcount * rpt_max; 33968fd57520SJan Höppner 33978fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 33988fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 33998fd57520SJan Höppner if (tpm) { 34008fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 34018fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 34028fd57520SJan Höppner if (pos++ > max_entries) 34038fd57520SJan Höppner break; 34048fd57520SJan Höppner } 34058fd57520SJan Höppner } else { 34068fd57520SJan Höppner if (i != cdata->expect.start_unit) 34078fd57520SJan Höppner pos += rpt_max - count; 34088fd57520SJan Höppner } 34098fd57520SJan Höppner 34108fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 34118fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 34128fd57520SJan Höppner 34138fd57520SJan Höppner /* Count and check number of records */ 34148fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 34158fd57520SJan Höppner 34168fd57520SJan Höppner if (count < rpt_exp) { 34178fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 34188fd57520SJan Höppner break; 34198fd57520SJan Höppner } 34208fd57520SJan Höppner if (count > rpt_exp) { 34218fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 34228fd57520SJan Höppner break; 34238fd57520SJan Höppner } 34248fd57520SJan Höppner 34258fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 34268fd57520SJan Höppner blksize = cdata->expect.blksize; 34278fd57520SJan Höppner kl = 0; 34288fd57520SJan Höppner 34298fd57520SJan Höppner /* 34308fd57520SJan Höppner * Set special values when checking CDL formatted 34318fd57520SJan Höppner * devices. 34328fd57520SJan Höppner */ 34338fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 34348fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 34358fd57520SJan Höppner if (j < 3) { 34368fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 34378fd57520SJan Höppner kl = 4; 34388fd57520SJan Höppner } 34398fd57520SJan Höppner } 34408fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 34418fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 34428fd57520SJan Höppner blksize = LABEL_SIZE - 44; 34438fd57520SJan Höppner kl = 44; 34448fd57520SJan Höppner } 34458fd57520SJan Höppner 34468fd57520SJan Höppner /* Check blocksize */ 34478fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 34488fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 34498fd57520SJan Höppner goto out; 34508fd57520SJan Höppner } 34518fd57520SJan Höppner /* Check if key length is 0 */ 34528fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 34538fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 34548fd57520SJan Höppner goto out; 34558fd57520SJan Höppner } 34568fd57520SJan Höppner /* Check if record_id is correct */ 34578fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 34588fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 34598fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 34608fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 34618fd57520SJan Höppner goto out; 34628fd57520SJan Höppner } 34638fd57520SJan Höppner } 34648fd57520SJan Höppner } 34658fd57520SJan Höppner 34668fd57520SJan Höppner out: 34678fd57520SJan Höppner /* 34688fd57520SJan Höppner * In case of no errors, we need to decrease by one 34698fd57520SJan Höppner * to get the correct positions. 34708fd57520SJan Höppner */ 34718fd57520SJan Höppner if (!cdata->result) { 34728fd57520SJan Höppner i--; 34738fd57520SJan Höppner pos--; 34748fd57520SJan Höppner } 34758fd57520SJan Höppner 34768fd57520SJan Höppner cdata->unit = i; 34778fd57520SJan Höppner cdata->num_records = count; 34788fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 34798fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 34808fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 34818fd57520SJan Höppner } 34828fd57520SJan Höppner 34838fd57520SJan Höppner /* 34848fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 34858fd57520SJan Höppner */ 34868fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 34878fd57520SJan Höppner struct format_check_t *cdata, 34888fd57520SJan Höppner int enable_pav) 34898fd57520SJan Höppner { 34908fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 34918fd57520SJan Höppner struct eckd_count *fmt_buffer; 34928fd57520SJan Höppner struct irb irb; 34938fd57520SJan Höppner int rpt_max, rpt_exp; 34948fd57520SJan Höppner int fmt_buffer_size; 34958fd57520SJan Höppner int trk_per_cyl; 34968fd57520SJan Höppner int trkcount; 34978fd57520SJan Höppner int tpm = 0; 34988fd57520SJan Höppner int rc; 34998fd57520SJan Höppner 35008fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 35018fd57520SJan Höppner 35028fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 35038fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 35048fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 35058fd57520SJan Höppner 35068fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 35078fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 35088fd57520SJan Höppner 35098fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 35108fd57520SJan Höppner if (!fmt_buffer) 35118fd57520SJan Höppner return -ENOMEM; 35128fd57520SJan Höppner 35138fd57520SJan Höppner /* 35148fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 35158fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 35168fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 35178fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 35188fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 35198fd57520SJan Höppner * processed using command mode. 35208fd57520SJan Höppner */ 35218fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 35228fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 35238fd57520SJan Höppner tpm = 1; 35248fd57520SJan Höppner 35258fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 35268fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 35278fd57520SJan Höppner if (rc && rc != -EIO) 35288fd57520SJan Höppner goto out; 35298fd57520SJan Höppner if (rc == -EIO) { 35308fd57520SJan Höppner /* 35318fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 35328fd57520SJan Höppner * with an incorrect length error, we're going to retry the 35338fd57520SJan Höppner * check with command mode. 35348fd57520SJan Höppner */ 35358fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 35368fd57520SJan Höppner tpm = 0; 35378fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 35388fd57520SJan Höppner enable_pav, tpm, 35398fd57520SJan Höppner fmt_buffer, rpt_max, 35408fd57520SJan Höppner &irb); 35418fd57520SJan Höppner if (rc) 35428fd57520SJan Höppner goto out; 35438fd57520SJan Höppner } else { 35448fd57520SJan Höppner goto out; 35458fd57520SJan Höppner } 35468fd57520SJan Höppner } 35478fd57520SJan Höppner 35488fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 35498fd57520SJan Höppner trk_per_cyl, tpm); 35508fd57520SJan Höppner 35518fd57520SJan Höppner out: 35528fd57520SJan Höppner kfree(fmt_buffer); 35538fd57520SJan Höppner 35548fd57520SJan Höppner return rc; 3555570d237cSJan Höppner } 3556570d237cSJan Höppner 35578e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 35581da177e4SLinus Torvalds { 3559a2ace466SHannes Reinecke if (cqr->retries < 0) { 3560a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3561a2ace466SHannes Reinecke return; 3562a2ace466SHannes Reinecke } 35638e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 35648e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 35658e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 35668e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3567c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 35681da177e4SLinus Torvalds } 35698e09f215SStefan Weinhuber }; 35701da177e4SLinus Torvalds 35711da177e4SLinus Torvalds static dasd_erp_fn_t 35721da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 35731da177e4SLinus Torvalds { 35748e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 35751da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 35761da177e4SLinus Torvalds 35771da177e4SLinus Torvalds switch (cdev->id.cu_type) { 35781da177e4SLinus Torvalds case 0x3990: 35791da177e4SLinus Torvalds case 0x2105: 35801da177e4SLinus Torvalds case 0x2107: 35811da177e4SLinus Torvalds case 0x1750: 35821da177e4SLinus Torvalds return dasd_3990_erp_action; 35831da177e4SLinus Torvalds case 0x9343: 35841da177e4SLinus Torvalds case 0x3880: 35851da177e4SLinus Torvalds default: 35861da177e4SLinus Torvalds return dasd_default_erp_action; 35871da177e4SLinus Torvalds } 35881da177e4SLinus Torvalds } 35891da177e4SLinus Torvalds 35901da177e4SLinus Torvalds static dasd_erp_fn_t 35911da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 35921da177e4SLinus Torvalds { 35931da177e4SLinus Torvalds return dasd_default_erp_postaction; 35941da177e4SLinus Torvalds } 35951da177e4SLinus Torvalds 35965a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 35975a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 35988e09f215SStefan Weinhuber struct irb *irb) 35998e09f215SStefan Weinhuber { 36008e09f215SStefan Weinhuber char mask; 3601f3eb5384SStefan Weinhuber char *sense = NULL; 3602543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 36038e09f215SStefan Weinhuber 36048e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 36058e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3606f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3607c8d1c0ffSStefan Haberland /* 3608c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3609c8d1c0ffSStefan Haberland * and only if not suspended 3610c8d1c0ffSStefan Haberland */ 3611501183f2SStefan Haberland if (!device->block && private->lcu && 361225e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3613c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3614c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3615501183f2SStefan Haberland /* schedule worker to reload device */ 3616501183f2SStefan Haberland dasd_reload_device(device); 3617501183f2SStefan Haberland } 36188e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 36198e09f215SStefan Weinhuber return; 36208e09f215SStefan Weinhuber } 36218e09f215SStefan Weinhuber 3622a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 36235a27e60dSStefan Weinhuber if (!sense) 36245a27e60dSStefan Weinhuber return; 36255a27e60dSStefan Weinhuber 36265a27e60dSStefan Weinhuber /* summary unit check */ 3627c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3628a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 362959a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 363059a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 363159a9ed5fSStefan Haberland "eckd suc: device already notified"); 363259a9ed5fSStefan Haberland return; 363359a9ed5fSStefan Haberland } 363459a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 363559a9ed5fSStefan Haberland if (!sense) { 363659a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 363759a9ed5fSStefan Haberland "eckd suc: no reason code available"); 363859a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 363959a9ed5fSStefan Haberland return; 364059a9ed5fSStefan Haberland 364159a9ed5fSStefan Haberland } 364259a9ed5fSStefan Haberland private->suc_reason = sense[8]; 364359a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 364459a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 364559a9ed5fSStefan Haberland private->suc_reason); 364659a9ed5fSStefan Haberland dasd_get_device(device); 364759a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 364859a9ed5fSStefan Haberland dasd_put_device(device); 364959a9ed5fSStefan Haberland 36508e09f215SStefan Weinhuber return; 36518e09f215SStefan Weinhuber } 36528e09f215SStefan Weinhuber 3653f60c768cSStefan Haberland /* service information message SIM */ 36545a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3655f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3656f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3657f60c768cSStefan Haberland return; 3658f60c768cSStefan Haberland } 3659f60c768cSStefan Haberland 36605a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 36615a27e60dSStefan Weinhuber * as alias devices may be used with several bases 36625a27e60dSStefan Weinhuber */ 3663c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3664c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 36655a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 36665a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 36675a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 36685a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 36695a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36705a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 36715a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3672ada3df91SStefan Haberland } 36735a27e60dSStefan Weinhuber } 3674f3eb5384SStefan Weinhuber 367591dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 367691dc4a19SJan Höppner unsigned int first_trk, 367791dc4a19SJan Höppner unsigned int last_trk) 367891dc4a19SJan Höppner { 367991dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 368091dc4a19SJan Höppner unsigned int trks_per_vol; 368191dc4a19SJan Höppner int rc = 0; 368291dc4a19SJan Höppner 368391dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 368491dc4a19SJan Höppner 368591dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 368691dc4a19SJan Höppner dev_warn(&device->cdev->dev, 368791dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 368891dc4a19SJan Höppner first_trk); 368991dc4a19SJan Höppner rc = -EINVAL; 369091dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 369191dc4a19SJan Höppner dev_warn(&device->cdev->dev, 369291dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 369391dc4a19SJan Höppner last_trk); 369491dc4a19SJan Höppner rc = -EINVAL; 369591dc4a19SJan Höppner } else if (first_trk > last_trk) { 369691dc4a19SJan Höppner dev_warn(&device->cdev->dev, 369791dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 369891dc4a19SJan Höppner first_trk); 369991dc4a19SJan Höppner rc = -EINVAL; 370091dc4a19SJan Höppner } 370191dc4a19SJan Höppner return rc; 370291dc4a19SJan Höppner } 370391dc4a19SJan Höppner 370491dc4a19SJan Höppner /* 370591dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 370691dc4a19SJan Höppner * with extent alignment in mind. 370791dc4a19SJan Höppner */ 370891dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 370991dc4a19SJan Höppner { 371091dc4a19SJan Höppner int cur_pos = 0; 371191dc4a19SJan Höppner int count = 0; 371291dc4a19SJan Höppner int tmp; 371391dc4a19SJan Höppner 371491dc4a19SJan Höppner if (from == to) 371591dc4a19SJan Höppner return 1; 371691dc4a19SJan Höppner 371791dc4a19SJan Höppner /* Count first partial extent */ 371891dc4a19SJan Höppner if (from % trks_per_ext != 0) { 371991dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 372091dc4a19SJan Höppner if (tmp > to) 372191dc4a19SJan Höppner tmp = to; 372291dc4a19SJan Höppner cur_pos = tmp - from + 1; 372391dc4a19SJan Höppner count++; 372491dc4a19SJan Höppner } 372591dc4a19SJan Höppner /* Count full extents */ 372691dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 372791dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 372891dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 372991dc4a19SJan Höppner cur_pos = tmp; 373091dc4a19SJan Höppner } 373191dc4a19SJan Höppner /* Count last partial extent */ 373291dc4a19SJan Höppner if (cur_pos < to) 373391dc4a19SJan Höppner count++; 373491dc4a19SJan Höppner 373591dc4a19SJan Höppner return count; 373691dc4a19SJan Höppner } 373791dc4a19SJan Höppner 3738c99bff34SStefan Haberland static int dasd_in_copy_relation(struct dasd_device *device) 3739c99bff34SStefan Haberland { 3740c99bff34SStefan Haberland struct dasd_pprc_data_sc4 *temp; 3741c99bff34SStefan Haberland int rc; 3742c99bff34SStefan Haberland 3743c99bff34SStefan Haberland if (!dasd_eckd_pprc_enabled(device)) 3744c99bff34SStefan Haberland return 0; 3745c99bff34SStefan Haberland 3746c99bff34SStefan Haberland temp = kzalloc(sizeof(*temp), GFP_KERNEL); 3747c99bff34SStefan Haberland if (!temp) 3748c99bff34SStefan Haberland return -ENOMEM; 3749c99bff34SStefan Haberland 3750c99bff34SStefan Haberland rc = dasd_eckd_query_pprc_status(device, temp); 3751c99bff34SStefan Haberland if (!rc) 3752c99bff34SStefan Haberland rc = temp->dev_info[0].state; 3753c99bff34SStefan Haberland 3754c99bff34SStefan Haberland kfree(temp); 3755c99bff34SStefan Haberland return rc; 3756c99bff34SStefan Haberland } 3757c99bff34SStefan Haberland 375891dc4a19SJan Höppner /* 375991dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 376091dc4a19SJan Höppner */ 376191dc4a19SJan Höppner static struct dasd_ccw_req * 376291dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 376391dc4a19SJan Höppner struct request *req, unsigned int first_trk, 376491dc4a19SJan Höppner unsigned int last_trk, int by_extent) 376591dc4a19SJan Höppner { 376691dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 376791dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 376891dc4a19SJan Höppner struct dasd_rssd_features *features; 376991dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 377091dc4a19SJan Höppner u16 heads, beg_head, end_head; 377191dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 377291dc4a19SJan Höppner struct dasd_ccw_req *cqr; 377391dc4a19SJan Höppner u32 beg_cyl, end_cyl; 3774c99bff34SStefan Haberland int copy_relation; 377591dc4a19SJan Höppner struct ccw1 *ccw; 377691dc4a19SJan Höppner int trks_per_ext; 377791dc4a19SJan Höppner size_t ras_size; 377891dc4a19SJan Höppner size_t size; 377991dc4a19SJan Höppner int nr_exts; 378091dc4a19SJan Höppner void *rq; 378191dc4a19SJan Höppner int i; 378291dc4a19SJan Höppner 378391dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 378491dc4a19SJan Höppner return ERR_PTR(-EINVAL); 378591dc4a19SJan Höppner 3786c99bff34SStefan Haberland copy_relation = dasd_in_copy_relation(device); 3787c99bff34SStefan Haberland if (copy_relation < 0) 3788c99bff34SStefan Haberland return ERR_PTR(copy_relation); 3789c99bff34SStefan Haberland 379091dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 379191dc4a19SJan Höppner 379291dc4a19SJan Höppner features = &private->features; 379391dc4a19SJan Höppner 379491dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 379591dc4a19SJan Höppner nr_exts = 0; 379691dc4a19SJan Höppner if (by_extent) 379791dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 379891dc4a19SJan Höppner ras_size = sizeof(*ras_data); 379991dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 380091dc4a19SJan Höppner 380191dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 380291dc4a19SJan Höppner if (IS_ERR(cqr)) { 380391dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 380491dc4a19SJan Höppner "Could not allocate RAS request"); 380591dc4a19SJan Höppner return cqr; 380691dc4a19SJan Höppner } 380791dc4a19SJan Höppner 380891dc4a19SJan Höppner ras_data = cqr->data; 380991dc4a19SJan Höppner memset(ras_data, 0, size); 381091dc4a19SJan Höppner 381191dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 381291dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 381391dc4a19SJan Höppner /* Release specified extents or entire volume */ 381491dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 381591dc4a19SJan Höppner /* 381691dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 381791dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 3818c99bff34SStefan Haberland * subset and for devices not in a copy relation. 381991dc4a19SJan Höppner */ 3820c99bff34SStefan Haberland if (features->feature[56] & 0x01 && !copy_relation) 3821c99bff34SStefan Haberland ras_data->op_flags.guarantee_init = 1; 3822c99bff34SStefan Haberland 3823542e30ceSStefan Haberland ras_data->lss = private->conf.ned->ID; 3824542e30ceSStefan Haberland ras_data->dev_addr = private->conf.ned->unit_addr; 382591dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 382691dc4a19SJan Höppner 382791dc4a19SJan Höppner if (by_extent) { 382891dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 382991dc4a19SJan Höppner cur_from_trk = first_trk; 383091dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 383191dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 383291dc4a19SJan Höppner if (cur_to_trk > last_trk) 383391dc4a19SJan Höppner cur_to_trk = last_trk; 383491dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 383591dc4a19SJan Höppner 383691dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 383791dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 383891dc4a19SJan Höppner beg_head = cur_from_trk % heads; 383991dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 384091dc4a19SJan Höppner end_head = cur_to_trk % heads; 384191dc4a19SJan Höppner 384291dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 384391dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 384491dc4a19SJan Höppner 384591dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 384691dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 384791dc4a19SJan Höppner if (cur_to_trk > last_trk) 384891dc4a19SJan Höppner cur_to_trk = last_trk; 384991dc4a19SJan Höppner ras_range++; 385091dc4a19SJan Höppner } 385191dc4a19SJan Höppner } 385291dc4a19SJan Höppner 385391dc4a19SJan Höppner ccw = cqr->cpaddr; 3854b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(cqr->data); 385591dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 385691dc4a19SJan Höppner ccw->count = size; 385791dc4a19SJan Höppner 385891dc4a19SJan Höppner cqr->startdev = device; 385991dc4a19SJan Höppner cqr->memdev = device; 386091dc4a19SJan Höppner cqr->block = block; 386191dc4a19SJan Höppner cqr->retries = 256; 386291dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 386391dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 386491dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 386591dc4a19SJan Höppner 386691dc4a19SJan Höppner return cqr; 386791dc4a19SJan Höppner } 386891dc4a19SJan Höppner 386991dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 387091dc4a19SJan Höppner { 387191dc4a19SJan Höppner struct dasd_ccw_req *cqr; 387291dc4a19SJan Höppner int rc; 387391dc4a19SJan Höppner 387491dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 387591dc4a19SJan Höppner if (IS_ERR(cqr)) 387691dc4a19SJan Höppner return PTR_ERR(cqr); 387791dc4a19SJan Höppner 387891dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 387991dc4a19SJan Höppner 388091dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 388191dc4a19SJan Höppner 388291dc4a19SJan Höppner return rc; 388391dc4a19SJan Höppner } 388491dc4a19SJan Höppner 388591dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 388691dc4a19SJan Höppner unsigned int from, unsigned int to) 388791dc4a19SJan Höppner { 388891dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 388991dc4a19SJan Höppner struct dasd_block *block = device->block; 389091dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 389191dc4a19SJan Höppner struct list_head ras_queue; 389291dc4a19SJan Höppner unsigned int device_exts; 389391dc4a19SJan Höppner int trks_per_ext; 389491dc4a19SJan Höppner int stop, step; 389591dc4a19SJan Höppner int cur_pos; 389691dc4a19SJan Höppner int rc = 0; 389791dc4a19SJan Höppner int retry; 389891dc4a19SJan Höppner 389991dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 390091dc4a19SJan Höppner 390191dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 390291dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 390391dc4a19SJan Höppner 390491dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 390591dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 390691dc4a19SJan Höppner cur_pos = from; 390791dc4a19SJan Höppner 390891dc4a19SJan Höppner do { 390991dc4a19SJan Höppner retry = 0; 391091dc4a19SJan Höppner while (cur_pos < to) { 391191dc4a19SJan Höppner stop = cur_pos + step - 391291dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 391391dc4a19SJan Höppner if (stop > to) 391491dc4a19SJan Höppner stop = to; 391591dc4a19SJan Höppner 391691dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 391791dc4a19SJan Höppner if (IS_ERR(cqr)) { 391891dc4a19SJan Höppner rc = PTR_ERR(cqr); 391991dc4a19SJan Höppner if (rc == -ENOMEM) { 392091dc4a19SJan Höppner if (list_empty(&ras_queue)) 392191dc4a19SJan Höppner goto out; 392291dc4a19SJan Höppner retry = 1; 392391dc4a19SJan Höppner break; 392491dc4a19SJan Höppner } 392591dc4a19SJan Höppner goto err_out; 392691dc4a19SJan Höppner } 392791dc4a19SJan Höppner 392891dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 392991dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 393091dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 393191dc4a19SJan Höppner cur_pos = stop + 1; 393291dc4a19SJan Höppner } 393391dc4a19SJan Höppner 393491dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 393591dc4a19SJan Höppner 393691dc4a19SJan Höppner err_out: 393791dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 393891dc4a19SJan Höppner device = cqr->startdev; 393991dc4a19SJan Höppner private = device->private; 394091dc4a19SJan Höppner 394191dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 394291dc4a19SJan Höppner list_del_init(&cqr->blocklist); 394391dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 394491dc4a19SJan Höppner dasd_sfree_request(cqr, device); 394591dc4a19SJan Höppner private->count--; 394691dc4a19SJan Höppner } 394791dc4a19SJan Höppner } while (retry); 394891dc4a19SJan Höppner 394991dc4a19SJan Höppner out: 395091dc4a19SJan Höppner return rc; 395191dc4a19SJan Höppner } 395291dc4a19SJan Höppner 395391dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 395491dc4a19SJan Höppner struct format_data_t *rdata) 395591dc4a19SJan Höppner { 395691dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 395791dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 395891dc4a19SJan Höppner else if (rdata->intensity == 0) 395991dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 396091dc4a19SJan Höppner rdata->stop_unit); 396191dc4a19SJan Höppner else 396291dc4a19SJan Höppner return -EINVAL; 396391dc4a19SJan Höppner } 396491dc4a19SJan Höppner 3965f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3966f3eb5384SStefan Weinhuber struct dasd_device *startdev, 39678e09f215SStefan Weinhuber struct dasd_block *block, 3968f3eb5384SStefan Weinhuber struct request *req, 3969f3eb5384SStefan Weinhuber sector_t first_rec, 3970f3eb5384SStefan Weinhuber sector_t last_rec, 3971f3eb5384SStefan Weinhuber sector_t first_trk, 3972f3eb5384SStefan Weinhuber sector_t last_trk, 3973f3eb5384SStefan Weinhuber unsigned int first_offs, 3974f3eb5384SStefan Weinhuber unsigned int last_offs, 3975f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3976f3eb5384SStefan Weinhuber unsigned int blksize) 39771da177e4SLinus Torvalds { 39781da177e4SLinus Torvalds struct dasd_eckd_private *private; 39791da177e4SLinus Torvalds unsigned long *idaws; 39801da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 39811da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 39821da177e4SLinus Torvalds struct ccw1 *ccw; 39835705f702SNeilBrown struct req_iterator iter; 39847988613bSKent Overstreet struct bio_vec bv; 39851da177e4SLinus Torvalds char *dst; 3986f3eb5384SStefan Weinhuber unsigned int off; 39871da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3988f3eb5384SStefan Weinhuber sector_t recid; 39891da177e4SLinus Torvalds unsigned char cmd, rcmd; 39908e09f215SStefan Weinhuber int use_prefix; 39918e09f215SStefan Weinhuber struct dasd_device *basedev; 39921da177e4SLinus Torvalds 39938e09f215SStefan Weinhuber basedev = block->base; 3994543691a4SSebastian Ott private = basedev->private; 39951da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39961da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 39971da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 39981da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 39991da177e4SLinus Torvalds else 40001da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 4001f3eb5384SStefan Weinhuber 40021da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 40031da177e4SLinus Torvalds count = 0; 40041da177e4SLinus Torvalds cidaw = 0; 40055705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 40067988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 40071da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 40081da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 40097988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 40107988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 40117988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 40121da177e4SLinus Torvalds } 40131da177e4SLinus Torvalds /* Paranoia. */ 40141da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 40151da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 40168e09f215SStefan Weinhuber 40178e09f215SStefan Weinhuber /* use the prefix command if available */ 40188e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 40198e09f215SStefan Weinhuber if (use_prefix) { 40208e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 40218e09f215SStefan Weinhuber cplength = 2 + count; 40228e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 40238e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 40248e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 40258e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 40268e09f215SStefan Weinhuber } else { 40271da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 40281da177e4SLinus Torvalds cplength = 2 + count; 40291da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 40308e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 40318e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 40321da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 40338e09f215SStefan Weinhuber } 40341da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 40351da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 40361da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 40371da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 40381da177e4SLinus Torvalds cplength += count; 40391da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 40401da177e4SLinus Torvalds } 40411da177e4SLinus Torvalds /* Allocate the ccw request. */ 404268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4043c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 40441da177e4SLinus Torvalds if (IS_ERR(cqr)) 40451da177e4SLinus Torvalds return cqr; 40461da177e4SLinus Torvalds ccw = cqr->cpaddr; 40478e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 40488e09f215SStefan Weinhuber if (use_prefix) { 40498e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 40508e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 40518e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 40528e09f215SStefan Weinhuber * Try again later. 40538e09f215SStefan Weinhuber */ 40548e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4055d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 4056d54853efSMartin Schwidefsky } 40578e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 40588e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 40598e09f215SStefan Weinhuber } else { 40608e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 406145f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 40628e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 40638e09f215SStefan Weinhuber * Try again later. 40648e09f215SStefan Weinhuber */ 40658e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 40668e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 40678e09f215SStefan Weinhuber } 40688e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 40698e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 40708e09f215SStefan Weinhuber } 40711da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 40721da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 40731da177e4SLinus Torvalds recid = first_rec; 40741da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 40751da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 40761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40771da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 40788e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 40791da177e4SLinus Torvalds } 40805705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4081bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 40821da177e4SLinus Torvalds if (dasd_page_cache) { 40831da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 4084441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 40851da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 40867988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 40871da177e4SLinus Torvalds if (copy) 40887988613bSKent Overstreet dst = copy + bv.bv_offset; 40891da177e4SLinus Torvalds } 40907988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 40911da177e4SLinus Torvalds sector_t trkid = recid; 40921da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 40931da177e4SLinus Torvalds rcmd = cmd; 40941da177e4SLinus Torvalds count = blksize; 40951da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 40961da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 40971da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 40981da177e4SLinus Torvalds rcmd |= 0x8; 40991da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 4100ec5883abSHorst Hummel if (count < blksize && 4101ec5883abSHorst Hummel rq_data_dir(req) == READ) 41021da177e4SLinus Torvalds memset(dst + count, 0xe5, 41031da177e4SLinus Torvalds blksize - count); 41041da177e4SLinus Torvalds } 41051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 41061da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 41071da177e4SLinus Torvalds trkid, recoffs + 1, 41088e09f215SStefan Weinhuber 1, rcmd, basedev, count); 41091da177e4SLinus Torvalds } 41101da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 41111da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 41121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 41131da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 41141da177e4SLinus Torvalds trkid, recoffs + 1, 41151da177e4SLinus Torvalds last_rec - recid + 1, 41168e09f215SStefan Weinhuber cmd, basedev, count); 41171da177e4SLinus Torvalds } 41181da177e4SLinus Torvalds /* Read/write ccw. */ 41191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 41201da177e4SLinus Torvalds ccw->cmd_code = rcmd; 41211da177e4SLinus Torvalds ccw->count = count; 41221da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 4123b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(idaws); 41241da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 41251da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 41261da177e4SLinus Torvalds } else { 4127b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(dst); 41281da177e4SLinus Torvalds ccw->flags = 0; 41291da177e4SLinus Torvalds } 41301da177e4SLinus Torvalds ccw++; 41311da177e4SLinus Torvalds dst += blksize; 41321da177e4SLinus Torvalds recid++; 41331da177e4SLinus Torvalds } 41341da177e4SLinus Torvalds } 413513de227bSHolger Smolinski if (blk_noretry_request(req) || 413613de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 41371c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 41388e09f215SStefan Weinhuber cqr->startdev = startdev; 41398e09f215SStefan Weinhuber cqr->memdev = startdev; 41408e09f215SStefan Weinhuber cqr->block = block; 41417c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4142c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 41431f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 41441aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41451da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41465e2b17e7SJan Höppner 41475e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 41485e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 41495e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 41505e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 41515e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 41525e2b17e7SJan Höppner } 41535e2b17e7SJan Höppner 41541da177e4SLinus Torvalds return cqr; 41551da177e4SLinus Torvalds } 41561da177e4SLinus Torvalds 4157f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4158f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4159f3eb5384SStefan Weinhuber struct dasd_block *block, 4160f3eb5384SStefan Weinhuber struct request *req, 4161f3eb5384SStefan Weinhuber sector_t first_rec, 4162f3eb5384SStefan Weinhuber sector_t last_rec, 4163f3eb5384SStefan Weinhuber sector_t first_trk, 4164f3eb5384SStefan Weinhuber sector_t last_trk, 4165f3eb5384SStefan Weinhuber unsigned int first_offs, 4166f3eb5384SStefan Weinhuber unsigned int last_offs, 4167f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4168f3eb5384SStefan Weinhuber unsigned int blksize) 4169f3eb5384SStefan Weinhuber { 4170f3eb5384SStefan Weinhuber unsigned long *idaws; 4171f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4172f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4173f3eb5384SStefan Weinhuber struct req_iterator iter; 41747988613bSKent Overstreet struct bio_vec bv; 4175f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 4176f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 4177f3eb5384SStefan Weinhuber unsigned int tlf; 4178f3eb5384SStefan Weinhuber sector_t recid; 4179f3eb5384SStefan Weinhuber unsigned char cmd; 4180f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4181f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 4182f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4183f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 4184f3eb5384SStefan Weinhuber sector_t trkid; 4185f3eb5384SStefan Weinhuber unsigned int recoffs; 4186f3eb5384SStefan Weinhuber 4187f3eb5384SStefan Weinhuber basedev = block->base; 4188f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 4189f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4190f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 4191f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4192f3eb5384SStefan Weinhuber else 4193f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4194f3eb5384SStefan Weinhuber 4195f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 4196f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 4197f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 4198f3eb5384SStefan Weinhuber * of records as upper limit. 4199f3eb5384SStefan Weinhuber */ 4200f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 4201f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4202f3eb5384SStefan Weinhuber 4203f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 4204f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 4205f3eb5384SStefan Weinhuber 42067bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4207f3eb5384SStefan Weinhuber 4208f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 420968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4210c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 4211f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4212f3eb5384SStefan Weinhuber return cqr; 4213f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4214f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4215f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4216f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4217f3eb5384SStefan Weinhuber else 4218f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4219f3eb5384SStefan Weinhuber tlf *= blksize; 4220f3eb5384SStefan Weinhuber 4221f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 4222f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 4223f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 4224f3eb5384SStefan Weinhuber trkcount, blksize, 4225f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 4226f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4227f3eb5384SStefan Weinhuber * Try again later. 4228f3eb5384SStefan Weinhuber */ 4229f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4230f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 4231f3eb5384SStefan Weinhuber } 4232f3eb5384SStefan Weinhuber 4233f3eb5384SStefan Weinhuber /* 4234f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 4235f3eb5384SStefan Weinhuber * following conditions: 4236f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 4237f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 4238f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 4239f3eb5384SStefan Weinhuber */ 4240f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 4241f3eb5384SStefan Weinhuber recid = first_rec; 4242f3eb5384SStefan Weinhuber new_track = 1; 4243f3eb5384SStefan Weinhuber end_idaw = 0; 4244f3eb5384SStefan Weinhuber len_to_track_end = 0; 4245246ccea1SMartin Schwidefsky idaw_dst = NULL; 4246f3eb5384SStefan Weinhuber idaw_len = 0; 4247f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4248bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 42497988613bSKent Overstreet seg_len = bv.bv_len; 4250f3eb5384SStefan Weinhuber while (seg_len) { 4251f3eb5384SStefan Weinhuber if (new_track) { 4252f3eb5384SStefan Weinhuber trkid = recid; 4253f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 4254f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 4255f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 4256f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 4257f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 4258f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4259f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 4260f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 4261b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(idaws); 4262f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 4263f3eb5384SStefan Weinhuber ccw++; 4264f3eb5384SStefan Weinhuber recid += count; 4265f3eb5384SStefan Weinhuber new_track = 0; 426652db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 426752db45c3SStefan Weinhuber if (!idaw_dst) 426852db45c3SStefan Weinhuber idaw_dst = dst; 4269f3eb5384SStefan Weinhuber } 427052db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 427152db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 4272f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 4273f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 4274f3eb5384SStefan Weinhuber * idaw ends 4275f3eb5384SStefan Weinhuber */ 427652db45c3SStefan Weinhuber if (!idaw_dst) { 4277b87c52e4SAlexander Gordeev if ((__u32)virt_to_phys(dst) & (IDA_BLOCK_SIZE - 1)) { 427852db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 427952db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 428052db45c3SStefan Weinhuber } else 4281f3eb5384SStefan Weinhuber idaw_dst = dst; 428252db45c3SStefan Weinhuber } 4283f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 4284f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4285f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 4286f3eb5384SStefan Weinhuber } 4287f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4288f3eb5384SStefan Weinhuber seg_len -= part_len; 4289f3eb5384SStefan Weinhuber dst += part_len; 4290f3eb5384SStefan Weinhuber idaw_len += part_len; 4291f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 4292f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 4293f3eb5384SStefan Weinhuber * -> create an idaw 4294f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 4295f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 4296f3eb5384SStefan Weinhuber */ 4297b87c52e4SAlexander Gordeev if (!((__u32)virt_to_phys(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE - 1))) 4298f3eb5384SStefan Weinhuber end_idaw = 1; 4299f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 4300f3eb5384SStefan Weinhuber if (!len_to_track_end) { 4301f3eb5384SStefan Weinhuber new_track = 1; 4302f3eb5384SStefan Weinhuber end_idaw = 1; 4303f3eb5384SStefan Weinhuber } 4304f3eb5384SStefan Weinhuber if (end_idaw) { 4305f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 4306f3eb5384SStefan Weinhuber idaw_len); 4307246ccea1SMartin Schwidefsky idaw_dst = NULL; 4308f3eb5384SStefan Weinhuber idaw_len = 0; 4309f3eb5384SStefan Weinhuber end_idaw = 0; 4310f3eb5384SStefan Weinhuber } 4311f3eb5384SStefan Weinhuber } 4312f3eb5384SStefan Weinhuber } 4313f3eb5384SStefan Weinhuber 4314f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4315f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4316f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4317f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4318f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4319f3eb5384SStefan Weinhuber cqr->block = block; 43207c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4321c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 43221f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 43231aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4324f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 43255e2b17e7SJan Höppner 43265e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 43275e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 43285e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 43295e2b17e7SJan Höppner 4330f3eb5384SStefan Weinhuber return cqr; 4331f3eb5384SStefan Weinhuber } 4332f3eb5384SStefan Weinhuber 4333f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4334f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4335f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4336f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4337f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4338f3eb5384SStefan Weinhuber unsigned int blksize, 4339f3eb5384SStefan Weinhuber unsigned int total_data_size, 4340f3eb5384SStefan Weinhuber unsigned int tlf, 4341f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4342f3eb5384SStefan Weinhuber { 4343f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4344f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4345f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4346f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4347f3eb5384SStefan Weinhuber struct dcw *dcw; 4348f3eb5384SStefan Weinhuber 4349f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4350f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4351f3eb5384SStefan Weinhuber u8 pfx_cmd; 4352f3eb5384SStefan Weinhuber 4353f3eb5384SStefan Weinhuber int rc = 0; 4354f3eb5384SStefan Weinhuber int sector = 0; 4355f3eb5384SStefan Weinhuber int dn, d; 4356f3eb5384SStefan Weinhuber 4357f3eb5384SStefan Weinhuber 4358f3eb5384SStefan Weinhuber /* setup prefix data */ 4359543691a4SSebastian Ott basepriv = basedev->private; 4360543691a4SSebastian Ott startpriv = startdev->private; 4361f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4362f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4363f3eb5384SStefan Weinhuber 4364f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4365f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4366542e30ceSStefan Haberland pfxdata.base_address = basepriv->conf.ned->unit_addr; 4367542e30ceSStefan Haberland pfxdata.base_lss = basepriv->conf.ned->ID; 4368f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4369f3eb5384SStefan Weinhuber 4370f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4371da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4372f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4373da340f92SStefan Haberland 4374da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4375da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4376f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4377f3eb5384SStefan Weinhuber } 4378f3eb5384SStefan Weinhuber 4379f3eb5384SStefan Weinhuber switch (cmd) { 4380f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4381f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4382f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4383f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4384f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4385f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4386f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4387f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4388f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4389f3eb5384SStefan Weinhuber break; 4390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4391f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4392f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4393f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 43945628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4395f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4396f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4397f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4398f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4399f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 440045f186beSJan Höppner /* 440145f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 440245f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 440345f186beSJan Höppner * data as well. 440445f186beSJan Höppner */ 440545f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 440645f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4407f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4408f3eb5384SStefan Weinhuber break; 44098fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 44108fd57520SJan Höppner dedata->mask.perm = 0x1; 44118fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 44128fd57520SJan Höppner dedata->ga_extended |= 0x42; 44138fd57520SJan Höppner dedata->blk_size = blksize; 44148fd57520SJan Höppner lredata->operation.orientation = 0x2; 44158fd57520SJan Höppner lredata->operation.operation = 0x16; 44168fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 44178fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 44188fd57520SJan Höppner break; 4419f3eb5384SStefan Weinhuber default: 4420f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4421f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4422f3eb5384SStefan Weinhuber BUG(); 4423f3eb5384SStefan Weinhuber break; 4424f3eb5384SStefan Weinhuber } 4425f3eb5384SStefan Weinhuber if (rc) 4426f3eb5384SStefan Weinhuber return rc; 4427f3eb5384SStefan Weinhuber 4428f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4429f3eb5384SStefan Weinhuber 4430f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4431f3eb5384SStefan Weinhuber begcyl = trk / heads; 4432f3eb5384SStefan Weinhuber beghead = trk % heads; 4433f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4434f3eb5384SStefan Weinhuber endhead = totrk % heads; 4435f3eb5384SStefan Weinhuber 4436f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4437f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4438f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4439f3eb5384SStefan Weinhuber 4440f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4441f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4442f3eb5384SStefan Weinhuber else 4443f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4444f3eb5384SStefan Weinhuber } 4445f3eb5384SStefan Weinhuber 4446f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4447f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4448f3eb5384SStefan Weinhuber 4449f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4450f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4451f3eb5384SStefan Weinhuber 4452f3eb5384SStefan Weinhuber if (rec_on_trk) { 4453f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4454f3eb5384SStefan Weinhuber case 0x3390: 4455f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4456f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4457f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4458f3eb5384SStefan Weinhuber break; 4459f3eb5384SStefan Weinhuber case 0x3380: 4460f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4461f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4462f3eb5384SStefan Weinhuber break; 4463f3eb5384SStefan Weinhuber } 4464f3eb5384SStefan Weinhuber } 4465f3eb5384SStefan Weinhuber 44668fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 44678fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 44688fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 44698fd57520SJan Höppner lredata->sector = 0xff; 44708fd57520SJan Höppner } else { 4471f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4472f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 44738fd57520SJan Höppner lredata->sector = sector; 44748fd57520SJan Höppner } 4475f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4476f3eb5384SStefan Weinhuber lredata->length = tlf; 4477f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4478f3eb5384SStefan Weinhuber lredata->count = count; 4479f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4480f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4481f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4482f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4483f3eb5384SStefan Weinhuber 4484f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4485f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4486757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4487f3eb5384SStefan Weinhuber } 4488f3eb5384SStefan Weinhuber 4489f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4490f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4491f3eb5384SStefan Weinhuber struct dasd_block *block, 4492f3eb5384SStefan Weinhuber struct request *req, 4493f3eb5384SStefan Weinhuber sector_t first_rec, 4494f3eb5384SStefan Weinhuber sector_t last_rec, 4495f3eb5384SStefan Weinhuber sector_t first_trk, 4496f3eb5384SStefan Weinhuber sector_t last_trk, 4497f3eb5384SStefan Weinhuber unsigned int first_offs, 4498f3eb5384SStefan Weinhuber unsigned int last_offs, 4499f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4500f3eb5384SStefan Weinhuber unsigned int blksize) 4501f3eb5384SStefan Weinhuber { 4502f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4503f3eb5384SStefan Weinhuber struct req_iterator iter; 45047988613bSKent Overstreet struct bio_vec bv; 4505f3eb5384SStefan Weinhuber char *dst; 4506f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4507f3eb5384SStefan Weinhuber unsigned char cmd; 4508f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4509f3eb5384SStefan Weinhuber unsigned int tlf; 4510f3eb5384SStefan Weinhuber struct itcw *itcw; 4511f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4512f3eb5384SStefan Weinhuber int itcw_op; 4513f3eb5384SStefan Weinhuber size_t itcw_size; 4514ef19298bSStefan Weinhuber u8 tidaw_flags; 4515ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4516ef19298bSStefan Weinhuber unsigned char new_track; 4517ef19298bSStefan Weinhuber sector_t recid, trkid; 4518ef19298bSStefan Weinhuber unsigned int offs; 4519ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4520cd10502bSJulia Lawall int ret; 4521f3eb5384SStefan Weinhuber 4522f3eb5384SStefan Weinhuber basedev = block->base; 4523f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4524f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4525f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4526f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4527f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4528f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4529f3eb5384SStefan Weinhuber } else 4530f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4531f3eb5384SStefan Weinhuber 4532f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4533f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4534f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4535ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4536ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4537f3eb5384SStefan Weinhuber */ 4538f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4539f3eb5384SStefan Weinhuber ctidaw = 0; 4540f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4541f3eb5384SStefan Weinhuber ++ctidaw; 4542f3eb5384SStefan Weinhuber } 4543ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4544ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4545f3eb5384SStefan Weinhuber 4546f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4547f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4548c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4549c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4550f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4551f3eb5384SStefan Weinhuber return cqr; 4552f3eb5384SStefan Weinhuber 4553f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4554f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4555f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4556f3eb5384SStefan Weinhuber else 4557f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4558f3eb5384SStefan Weinhuber tlf *= blksize; 4559f3eb5384SStefan Weinhuber 4560f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4561ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4562cd10502bSJulia Lawall ret = -EINVAL; 4563cd10502bSJulia Lawall goto out_error; 4564ef19298bSStefan Weinhuber } 4565f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4566f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4567f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4568f3eb5384SStefan Weinhuber first_offs + 1, 4569f3eb5384SStefan Weinhuber trkcount, blksize, 4570f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4571f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4572f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4573f3eb5384SStefan Weinhuber * Try again later. 4574f3eb5384SStefan Weinhuber */ 4575cd10502bSJulia Lawall ret = -EAGAIN; 4576cd10502bSJulia Lawall goto out_error; 4577f3eb5384SStefan Weinhuber } 4578d54cddb6SHeiko Carstens len_to_track_end = 0; 4579f3eb5384SStefan Weinhuber /* 4580f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4581f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4582f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4583f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4584ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4585ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4586f3eb5384SStefan Weinhuber */ 4587ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4588ef19298bSStefan Weinhuber new_track = 1; 4589ef19298bSStefan Weinhuber recid = first_rec; 4590f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4591bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 45927988613bSKent Overstreet seg_len = bv.bv_len; 4593ef19298bSStefan Weinhuber while (seg_len) { 4594ef19298bSStefan Weinhuber if (new_track) { 4595ef19298bSStefan Weinhuber trkid = recid; 4596ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4597ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4598ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4599ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4600ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4601ef19298bSStefan Weinhuber recid += count; 4602ef19298bSStefan Weinhuber new_track = 0; 4603f3eb5384SStefan Weinhuber } 4604ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4605ef19298bSStefan Weinhuber seg_len -= part_len; 4606ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4607ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4608ef19298bSStefan Weinhuber if (!len_to_track_end) { 4609ef19298bSStefan Weinhuber new_track = 1; 4610ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4611ef19298bSStefan Weinhuber } else 4612ef19298bSStefan Weinhuber tidaw_flags = 0; 4613ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4614ef19298bSStefan Weinhuber dst, part_len); 4615cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4616cd10502bSJulia Lawall ret = -EINVAL; 4617cd10502bSJulia Lawall goto out_error; 4618cd10502bSJulia Lawall } 4619ef19298bSStefan Weinhuber dst += part_len; 4620ef19298bSStefan Weinhuber } 4621ef19298bSStefan Weinhuber } 4622ef19298bSStefan Weinhuber } else { 4623ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4624bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 4625ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 46267988613bSKent Overstreet dst, bv.bv_len); 4627cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4628cd10502bSJulia Lawall ret = -EINVAL; 4629cd10502bSJulia Lawall goto out_error; 4630cd10502bSJulia Lawall } 4631ef19298bSStefan Weinhuber } 4632ef19298bSStefan Weinhuber } 4633ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4634ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4635f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4636f3eb5384SStefan Weinhuber 4637f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4638f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4639f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4640ef19298bSStefan Weinhuber cqr->cpmode = 1; 4641f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4642f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4643f3eb5384SStefan Weinhuber cqr->block = block; 46447c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4645c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 46461f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 46471aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4648f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 46495e2b17e7SJan Höppner 46505e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 46515e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 46525e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 46535e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 46545e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 46555e2b17e7SJan Höppner } 46565e2b17e7SJan Höppner 4657f3eb5384SStefan Weinhuber return cqr; 4658cd10502bSJulia Lawall out_error: 4659cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4660cd10502bSJulia Lawall return ERR_PTR(ret); 4661f3eb5384SStefan Weinhuber } 4662f3eb5384SStefan Weinhuber 4663f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4664f3eb5384SStefan Weinhuber struct dasd_block *block, 4665f3eb5384SStefan Weinhuber struct request *req) 4666f3eb5384SStefan Weinhuber { 4667ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4668f3eb5384SStefan Weinhuber int use_prefix; 4669ef19298bSStefan Weinhuber int fcx_multitrack; 467045b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4671f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4672f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4673f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4674f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4675f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4676f3eb5384SStefan Weinhuber int cdlspecial; 4677ef19298bSStefan Weinhuber unsigned int data_size; 4678f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4679f3eb5384SStefan Weinhuber 4680f3eb5384SStefan Weinhuber basedev = block->base; 4681543691a4SSebastian Ott private = basedev->private; 4682f3eb5384SStefan Weinhuber 4683f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4684f3eb5384SStefan Weinhuber blksize = block->bp_block; 4685f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 46866fca97a9SStefan Haberland if (blk_per_trk == 0) 46876fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4688f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 468983096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4690f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4691f3eb5384SStefan Weinhuber last_rec = last_trk = 469283096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4693f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4694f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4695f3eb5384SStefan Weinhuber 4696ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4697ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 469826a35f37SStefan Weinhuber if (data_size % blksize) 469926a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4700ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4701ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4702ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4703f3eb5384SStefan Weinhuber 4704f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4705f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4706f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4707f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4708f3eb5384SStefan Weinhuber 4709f3eb5384SStefan Weinhuber cqr = NULL; 4710f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4711f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4712ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4713ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4714f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4715f3eb5384SStefan Weinhuber first_rec, last_rec, 4716f3eb5384SStefan Weinhuber first_trk, last_trk, 4717f3eb5384SStefan Weinhuber first_offs, last_offs, 4718f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4719ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4720ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4721f3eb5384SStefan Weinhuber cqr = NULL; 4722f3eb5384SStefan Weinhuber } else if (use_prefix && 4723f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4724f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4725f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4726f3eb5384SStefan Weinhuber first_rec, last_rec, 4727f3eb5384SStefan Weinhuber first_trk, last_trk, 4728f3eb5384SStefan Weinhuber first_offs, last_offs, 4729f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4730ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4731ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4732f3eb5384SStefan Weinhuber cqr = NULL; 4733f3eb5384SStefan Weinhuber } 4734f3eb5384SStefan Weinhuber if (!cqr) 4735f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4736f3eb5384SStefan Weinhuber first_rec, last_rec, 4737f3eb5384SStefan Weinhuber first_trk, last_trk, 4738f3eb5384SStefan Weinhuber first_offs, last_offs, 4739f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4740f3eb5384SStefan Weinhuber return cqr; 4741f3eb5384SStefan Weinhuber } 4742f3eb5384SStefan Weinhuber 4743bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4744e4dbb0f2SStefan Haberland struct dasd_block *block, 4745e4dbb0f2SStefan Haberland struct request *req) 4746e4dbb0f2SStefan Haberland { 47479d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4748e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4749e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4750558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 47519d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 47529d2be0c1SJan Höppner struct dasd_device *basedev; 47539d2be0c1SJan Höppner struct req_iterator iter; 47549d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 47559d2be0c1SJan Höppner unsigned int trkcount; 47569d2be0c1SJan Höppner unsigned long *idaws; 47579d2be0c1SJan Höppner unsigned int size; 47589d2be0c1SJan Höppner unsigned char cmd; 47599d2be0c1SJan Höppner struct bio_vec bv; 47609d2be0c1SJan Höppner struct ccw1 *ccw; 47619d2be0c1SJan Höppner int use_prefix; 47629d2be0c1SJan Höppner void *data; 47639d2be0c1SJan Höppner char *dst; 4764e4dbb0f2SStefan Haberland 4765e4dbb0f2SStefan Haberland /* 4766e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4767558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4768558b9ef0SStefan Weinhuber * the request with dummy pages. 4769e4dbb0f2SStefan Haberland */ 4770558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4771558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4772558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4773558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4774558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4775558b9ef0SStefan Weinhuber basedev = block->base; 4776558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4777558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4778558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4779e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4780558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 47819d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4782e4dbb0f2SStefan Haberland } 4783e4dbb0f2SStefan Haberland 4784e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4785e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4786e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4787e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4788e4dbb0f2SStefan Haberland 4789e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4790e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4791e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4792e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 47939d2be0c1SJan Höppner else 47949d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4795e4dbb0f2SStefan Haberland 4796e4dbb0f2SStefan Haberland /* 4797e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4798e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4799e4dbb0f2SStefan Haberland */ 4800e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4801e4dbb0f2SStefan Haberland 4802e4dbb0f2SStefan Haberland /* 48039d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 48049d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4805e4dbb0f2SStefan Haberland */ 48069d2be0c1SJan Höppner base_priv = basedev->private; 48079d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 48089d2be0c1SJan Höppner if (use_prefix) { 48099d2be0c1SJan Höppner cplength = 1 + trkcount; 48109d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 48119d2be0c1SJan Höppner } else { 48129d2be0c1SJan Höppner cplength = 2 + trkcount; 48139d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 48149d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 48159d2be0c1SJan Höppner } 48169d2be0c1SJan Höppner size = ALIGN(size, 8); 4817e4dbb0f2SStefan Haberland 48187bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4819e4dbb0f2SStefan Haberland 4820e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4821e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4822c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4823e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 48249d2be0c1SJan Höppner return cqr; 4825e4dbb0f2SStefan Haberland 48269d2be0c1SJan Höppner ccw = cqr->cpaddr; 48279d2be0c1SJan Höppner data = cqr->data; 48289d2be0c1SJan Höppner 48299d2be0c1SJan Höppner if (use_prefix) { 48309d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 4831590ce6d9SStefan Haberland startdev, 1, 0, trkcount, 0, 0); 48329d2be0c1SJan Höppner } else { 48339d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 48349d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 48359d2be0c1SJan Höppner 48369d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 4837590ce6d9SStefan Haberland locate_record_ext(ccw++, data, first_trk, 0, 48389d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4839e4dbb0f2SStefan Haberland } 4840e4dbb0f2SStefan Haberland 48419d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4842e4dbb0f2SStefan Haberland len_to_track_end = 0; 4843558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4844558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4845558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4846558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4847558b9ef0SStefan Weinhuber ccw->count = 57326; 4848558b9ef0SStefan Weinhuber /* 64k map to one track */ 4849558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4850b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(idaws); 4851558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4852558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4853558b9ef0SStefan Weinhuber ccw++; 4854558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4855558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4856558b9ef0SStefan Weinhuber } 4857e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 4858bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 48597988613bSKent Overstreet seg_len = bv.bv_len; 4860558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4861558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4862e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4863e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4864e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4865e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4866e4dbb0f2SStefan Haberland ccw->count = 57326; 4867e4dbb0f2SStefan Haberland /* 64k map to one track */ 4868e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4869b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(idaws); 4870e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4871e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4872e4dbb0f2SStefan Haberland ccw++; 4873e4dbb0f2SStefan Haberland } 4874e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4875e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4876e4dbb0f2SStefan Haberland } 4877558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4878558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4879e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4880e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4881e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4882e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4883e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4884e4dbb0f2SStefan Haberland cqr->block = block; 4885e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4886c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 48871f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 48881aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4889e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4890e4dbb0f2SStefan Haberland 4891e4dbb0f2SStefan Haberland return cqr; 4892e4dbb0f2SStefan Haberland } 4893e4dbb0f2SStefan Haberland 4894e4dbb0f2SStefan Haberland 48951da177e4SLinus Torvalds static int 48961da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 48971da177e4SLinus Torvalds { 48981da177e4SLinus Torvalds struct dasd_eckd_private *private; 48991da177e4SLinus Torvalds struct ccw1 *ccw; 49005705f702SNeilBrown struct req_iterator iter; 49017988613bSKent Overstreet struct bio_vec bv; 49021da177e4SLinus Torvalds char *dst, *cda; 49031da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 49041da177e4SLinus Torvalds sector_t recid; 49055705f702SNeilBrown int status; 49061da177e4SLinus Torvalds 49071da177e4SLinus Torvalds if (!dasd_page_cache) 49081da177e4SLinus Torvalds goto out; 4909543691a4SSebastian Ott private = cqr->block->base->private; 49108e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 49111da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 491283096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 49131da177e4SLinus Torvalds ccw = cqr->cpaddr; 49141da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 49151da177e4SLinus Torvalds ccw++; 49161da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 49171da177e4SLinus Torvalds ccw++; 49185705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4919bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 49207988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 49211da177e4SLinus Torvalds /* Skip locate record. */ 49221da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 49231da177e4SLinus Torvalds ccw++; 49241da177e4SLinus Torvalds if (dst) { 49251da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 4926b87c52e4SAlexander Gordeev cda = *((char **)phys_to_virt(ccw->cda)); 49271da177e4SLinus Torvalds else 4928b87c52e4SAlexander Gordeev cda = phys_to_virt(ccw->cda); 49291da177e4SLinus Torvalds if (dst != cda) { 49301da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 49317988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 49321da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 49331da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 49341da177e4SLinus Torvalds } 49351da177e4SLinus Torvalds dst = NULL; 49361da177e4SLinus Torvalds } 49371da177e4SLinus Torvalds ccw++; 49381da177e4SLinus Torvalds recid++; 49391da177e4SLinus Torvalds } 49401da177e4SLinus Torvalds } 49411da177e4SLinus Torvalds out: 49421da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 49438e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 49441da177e4SLinus Torvalds return status; 49451da177e4SLinus Torvalds } 49461da177e4SLinus Torvalds 49478e09f215SStefan Weinhuber /* 4948f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 49498e09f215SStefan Weinhuber * 49508e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 49518e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 49528e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 49538e09f215SStefan Weinhuber */ 49548e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 49558e09f215SStefan Weinhuber { 49568e09f215SStefan Weinhuber struct ccw1 *ccw; 49578e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4958f3eb5384SStefan Weinhuber struct tcw *tcw; 4959f3eb5384SStefan Weinhuber struct tccb *tccb; 4960f3eb5384SStefan Weinhuber struct dcw *dcw; 49618e09f215SStefan Weinhuber 4962f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4963f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4964f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4965f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4966f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4967f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4968f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4969f3eb5384SStefan Weinhuber } else { 49708e09f215SStefan Weinhuber ccw = cqr->cpaddr; 49718e09f215SStefan Weinhuber pfxdata = cqr->data; 49728e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 49738e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 49748e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 49758e09f215SStefan Weinhuber } 49768e09f215SStefan Weinhuber } 4977f3eb5384SStefan Weinhuber } 49788e09f215SStefan Weinhuber 49798e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 49808e09f215SStefan Weinhuber 49818e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 49828e09f215SStefan Weinhuber struct dasd_block *block, 49838e09f215SStefan Weinhuber struct request *req) 49848e09f215SStefan Weinhuber { 49858e09f215SStefan Weinhuber struct dasd_eckd_private *private; 4986964ce509SStefan Haberland struct dasd_device *startdev; 49877e64db15SJan Höppner unsigned long flags; 4988964ce509SStefan Haberland struct dasd_ccw_req *cqr; 49898e09f215SStefan Weinhuber 49908e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 49918e09f215SStefan Weinhuber if (!startdev) 49928e09f215SStefan Weinhuber startdev = base; 4993543691a4SSebastian Ott private = startdev->private; 49948e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 49958e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 49968e09f215SStefan Weinhuber 49978e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 49988e09f215SStefan Weinhuber private->count++; 4999e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 5000bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 5001e4dbb0f2SStefan Haberland else 50028e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 50038e09f215SStefan Weinhuber if (IS_ERR(cqr)) 50048e09f215SStefan Weinhuber private->count--; 50058e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 50068e09f215SStefan Weinhuber return cqr; 50078e09f215SStefan Weinhuber } 50088e09f215SStefan Weinhuber 50098e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 50108e09f215SStefan Weinhuber struct request *req) 50118e09f215SStefan Weinhuber { 50128e09f215SStefan Weinhuber struct dasd_eckd_private *private; 50138e09f215SStefan Weinhuber unsigned long flags; 50148e09f215SStefan Weinhuber 50158e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 5016543691a4SSebastian Ott private = cqr->memdev->private; 50178e09f215SStefan Weinhuber private->count--; 50188e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 50198e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 50208e09f215SStefan Weinhuber } 50218e09f215SStefan Weinhuber 50221da177e4SLinus Torvalds static int 50231da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 50241da177e4SLinus Torvalds struct dasd_information2_t * info) 50251da177e4SLinus Torvalds { 5026543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 50271da177e4SLinus Torvalds 50281da177e4SLinus Torvalds info->label_block = 2; 50291da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 50301da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 5031543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 50321da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 5033543691a4SSebastian Ott sizeof(private->rdc_data)); 5034542e30ceSStefan Haberland info->confdata_size = min_t(unsigned long, private->conf.len, 50354abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 5036542e30ceSStefan Haberland memcpy(info->configuration_data, private->conf.data, 50374abb08c2SStefan Weinhuber info->confdata_size); 50381da177e4SLinus Torvalds return 0; 50391da177e4SLinus Torvalds } 50401da177e4SLinus Torvalds 50411da177e4SLinus Torvalds /* 50421da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 50431da177e4SLinus Torvalds */ 50441da177e4SLinus Torvalds 50451da177e4SLinus Torvalds /* 50461da177e4SLinus Torvalds * Release device ioctl. 50471da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 50481da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 50491da177e4SLinus Torvalds */ 50501da177e4SLinus Torvalds static int 50511107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 50521da177e4SLinus Torvalds { 50531da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50541da177e4SLinus Torvalds int rc; 5055f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5056f932bceaSStefan Weinhuber int useglobal; 50571da177e4SLinus Torvalds 50581da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50591da177e4SLinus Torvalds return -EACCES; 50601da177e4SLinus Torvalds 5061f932bceaSStefan Weinhuber useglobal = 0; 5062c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50631da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5064f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5065f932bceaSStefan Weinhuber useglobal = 1; 5066f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5067f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5068f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5069f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5070f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5071f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5072f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50731da177e4SLinus Torvalds } 5074f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5075f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 5076f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5077f3eb5384SStefan Weinhuber ccw->count = 32; 5078b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(cqr->data); 50798e09f215SStefan Weinhuber cqr->startdev = device; 50808e09f215SStefan Weinhuber cqr->memdev = device; 50811da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50821c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5083336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50841da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50851aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50861da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50871da177e4SLinus Torvalds 50881da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50895a27e60dSStefan Weinhuber if (!rc) 50905a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50911da177e4SLinus Torvalds 5092f932bceaSStefan Weinhuber if (useglobal) 5093f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5094f932bceaSStefan Weinhuber else 50958e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50961da177e4SLinus Torvalds return rc; 50971da177e4SLinus Torvalds } 50981da177e4SLinus Torvalds 50991da177e4SLinus Torvalds /* 51001da177e4SLinus Torvalds * Reserve device ioctl. 51011da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 51021da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 51031da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 51041da177e4SLinus Torvalds */ 51051da177e4SLinus Torvalds static int 51061107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 51071da177e4SLinus Torvalds { 51081da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 51091da177e4SLinus Torvalds int rc; 5110f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5111f932bceaSStefan Weinhuber int useglobal; 51121da177e4SLinus Torvalds 51131da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 51141da177e4SLinus Torvalds return -EACCES; 51151da177e4SLinus Torvalds 5116f932bceaSStefan Weinhuber useglobal = 0; 5117c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 51181da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5119f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5120f932bceaSStefan Weinhuber useglobal = 1; 5121f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5122f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5123f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5124f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5125f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5126f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5127f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 51281da177e4SLinus Torvalds } 5129f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5130f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 5131f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5132f3eb5384SStefan Weinhuber ccw->count = 32; 5133b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(cqr->data); 51348e09f215SStefan Weinhuber cqr->startdev = device; 51358e09f215SStefan Weinhuber cqr->memdev = device; 51361da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 51371c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5138336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 51391da177e4SLinus Torvalds cqr->expires = 2 * HZ; 51401aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 51411da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 51421da177e4SLinus Torvalds 51431da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 51445a27e60dSStefan Weinhuber if (!rc) 51455a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 51461da177e4SLinus Torvalds 5147f932bceaSStefan Weinhuber if (useglobal) 5148f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5149f932bceaSStefan Weinhuber else 51508e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 51511da177e4SLinus Torvalds return rc; 51521da177e4SLinus Torvalds } 51531da177e4SLinus Torvalds 51541da177e4SLinus Torvalds /* 51551da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 51561da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 51571da177e4SLinus Torvalds * (unconditional reserve) 51581da177e4SLinus Torvalds */ 51591da177e4SLinus Torvalds static int 51601107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 51611da177e4SLinus Torvalds { 51621da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 51631da177e4SLinus Torvalds int rc; 5164f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5165f932bceaSStefan Weinhuber int useglobal; 51661da177e4SLinus Torvalds 51671da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 51681da177e4SLinus Torvalds return -EACCES; 51691da177e4SLinus Torvalds 5170f932bceaSStefan Weinhuber useglobal = 0; 5171c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 51721da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5173f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5174f932bceaSStefan Weinhuber useglobal = 1; 5175f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5176f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5177f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5178f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5179f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5180f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5181f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 51821da177e4SLinus Torvalds } 5183f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5184f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5185f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5186f3eb5384SStefan Weinhuber ccw->count = 32; 5187b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(cqr->data); 51888e09f215SStefan Weinhuber cqr->startdev = device; 51898e09f215SStefan Weinhuber cqr->memdev = device; 51901da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 51911c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5192336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 51931da177e4SLinus Torvalds cqr->expires = 2 * HZ; 51941aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 51951da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 51961da177e4SLinus Torvalds 51971da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 51985a27e60dSStefan Weinhuber if (!rc) 51995a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 52001da177e4SLinus Torvalds 5201f932bceaSStefan Weinhuber if (useglobal) 5202f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5203f932bceaSStefan Weinhuber else 52048e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 52051da177e4SLinus Torvalds return rc; 52061da177e4SLinus Torvalds } 52071da177e4SLinus Torvalds 52081da177e4SLinus Torvalds /* 5209196339f1SStefan Weinhuber * SNID - Sense Path Group ID 5210196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 5211196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 5212196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 5213196339f1SStefan Weinhuber */ 5214196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 5215196339f1SStefan Weinhuber void __user *argp) 5216196339f1SStefan Weinhuber { 5217196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 5218196339f1SStefan Weinhuber int rc; 5219196339f1SStefan Weinhuber struct ccw1 *ccw; 5220196339f1SStefan Weinhuber int useglobal; 5221196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 5222196339f1SStefan Weinhuber 5223196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 5224196339f1SStefan Weinhuber return -EACCES; 5225196339f1SStefan Weinhuber 5226196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5227196339f1SStefan Weinhuber return -EFAULT; 5228196339f1SStefan Weinhuber 5229196339f1SStefan Weinhuber useglobal = 0; 5230196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5231c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 5232c5205f2fSSebastian Ott NULL); 5233196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 5234196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5235196339f1SStefan Weinhuber useglobal = 1; 5236196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5237196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5238196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5239196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5240196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5241196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5242196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 5243196339f1SStefan Weinhuber } 5244196339f1SStefan Weinhuber ccw = cqr->cpaddr; 5245196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 5246196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5247196339f1SStefan Weinhuber ccw->count = 12; 5248b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(cqr->data); 5249196339f1SStefan Weinhuber cqr->startdev = device; 5250196339f1SStefan Weinhuber cqr->memdev = device; 5251196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5252196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 52535a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5254196339f1SStefan Weinhuber cqr->retries = 5; 5255196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 52561aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5257196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 5258196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 5259196339f1SStefan Weinhuber 5260196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 5261196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 5262196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5263196339f1SStefan Weinhuber rc = -EIO; 5264196339f1SStefan Weinhuber if (!rc) { 5265196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 5266196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5267196339f1SStefan Weinhuber rc = -EFAULT; 5268196339f1SStefan Weinhuber } 5269196339f1SStefan Weinhuber 5270196339f1SStefan Weinhuber if (useglobal) 5271196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5272196339f1SStefan Weinhuber else 5273196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 5274196339f1SStefan Weinhuber return rc; 5275196339f1SStefan Weinhuber } 5276196339f1SStefan Weinhuber 5277196339f1SStefan Weinhuber /* 52781da177e4SLinus Torvalds * Read performance statistics 52791da177e4SLinus Torvalds */ 52801da177e4SLinus Torvalds static int 52811107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 52821da177e4SLinus Torvalds { 52831da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 52841da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 52851da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 52861da177e4SLinus Torvalds struct ccw1 *ccw; 52871da177e4SLinus Torvalds int rc; 52881da177e4SLinus Torvalds 528968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 52901da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 52911da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 5292c5205f2fSSebastian Ott device, NULL); 52931da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5294fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 52951da177e4SLinus Torvalds "Could not allocate initialization request"); 52961da177e4SLinus Torvalds return PTR_ERR(cqr); 52971da177e4SLinus Torvalds } 52988e09f215SStefan Weinhuber cqr->startdev = device; 52998e09f215SStefan Weinhuber cqr->memdev = device; 53001da177e4SLinus Torvalds cqr->retries = 0; 5301eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 53021da177e4SLinus Torvalds cqr->expires = 10 * HZ; 53031da177e4SLinus Torvalds 53041da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 53051da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 53061da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 53071da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 53085d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 53091da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 53101da177e4SLinus Torvalds 53111da177e4SLinus Torvalds ccw = cqr->cpaddr; 53121da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 53131da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 53141da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 5315b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(prssdp); 53161da177e4SLinus Torvalds 53171da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 53181da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 53191da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 53201da177e4SLinus Torvalds 53211da177e4SLinus Torvalds ccw++; 53221da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 53231da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 5324b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(stats); 53251da177e4SLinus Torvalds 53261aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 53271da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 53281da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 53291da177e4SLinus Torvalds if (rc == 0) { 53301da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 53311da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 53321107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 53331107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 53341107ccfbSChristoph Hellwig rc = -EFAULT; 53351da177e4SLinus Torvalds } 53368e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 53371da177e4SLinus Torvalds return rc; 53381da177e4SLinus Torvalds } 53391da177e4SLinus Torvalds 53401da177e4SLinus Torvalds /* 53411da177e4SLinus Torvalds * Get attributes (cache operations) 53421da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 53431da177e4SLinus Torvalds */ 53441da177e4SLinus Torvalds static int 53451107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 53461da177e4SLinus Torvalds { 5347543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 53481107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 53491da177e4SLinus Torvalds int rc; 53501da177e4SLinus Torvalds 53511da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 53521da177e4SLinus Torvalds return -EACCES; 53531107ccfbSChristoph Hellwig if (!argp) 53541da177e4SLinus Torvalds return -EINVAL; 53551da177e4SLinus Torvalds 53561107ccfbSChristoph Hellwig rc = 0; 53571107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 53581107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 53591107ccfbSChristoph Hellwig rc = -EFAULT; 53601da177e4SLinus Torvalds 53611da177e4SLinus Torvalds return rc; 53621da177e4SLinus Torvalds } 53631da177e4SLinus Torvalds 53641da177e4SLinus Torvalds /* 53651da177e4SLinus Torvalds * Set attributes (cache operations) 53661da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 53671da177e4SLinus Torvalds */ 53681da177e4SLinus Torvalds static int 53691107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 53701da177e4SLinus Torvalds { 5371543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 53721da177e4SLinus Torvalds struct attrib_data_t attrib; 53731da177e4SLinus Torvalds 53741da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 53751da177e4SLinus Torvalds return -EACCES; 53761107ccfbSChristoph Hellwig if (!argp) 53771da177e4SLinus Torvalds return -EINVAL; 53781da177e4SLinus Torvalds 53791107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 53801da177e4SLinus Torvalds return -EFAULT; 53811da177e4SLinus Torvalds private->attrib = attrib; 53821da177e4SLinus Torvalds 5383fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5384fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 53851da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 53861da177e4SLinus Torvalds return 0; 53871da177e4SLinus Torvalds } 53881da177e4SLinus Torvalds 5389ab1d848fSNigel Hislop /* 5390ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5391ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5392ab1d848fSNigel Hislop */ 5393ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5394ab1d848fSNigel Hislop { 5395ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5396ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5397ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5398ab1d848fSNigel Hislop struct ccw1 *ccw; 539952898025SNigel Hislop char psf0, psf1; 5400ab1d848fSNigel Hislop int rc; 5401ab1d848fSNigel Hislop 540252898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 540352898025SNigel Hislop return -EACCES; 540452898025SNigel Hislop psf0 = psf1 = 0; 540552898025SNigel Hislop 5406ab1d848fSNigel Hislop /* Copy parms from caller */ 5407ab1d848fSNigel Hislop rc = -EFAULT; 5408ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5409ab1d848fSNigel Hislop goto out; 541092d62891SHeiko Carstens if (is_compat_task()) { 5411ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5412ab1d848fSNigel Hislop rc = -EINVAL; 5413f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5414ab1d848fSNigel Hislop goto out; 5415f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5416f8b06859SHeiko Carstens goto out; 5417f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5418f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5419ab1d848fSNigel Hislop } 54204a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 54214a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 54224a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 54234a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 54244a8ef699SStefan Haberland usrparm.psf_data_len); 54254a8ef699SStefan Haberland rc = -EINVAL; 54264a8ef699SStefan Haberland goto out; 54274a8ef699SStefan Haberland } 5428ab1d848fSNigel Hislop /* alloc I/O data area */ 5429ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5430ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5431ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5432ab1d848fSNigel Hislop rc = -ENOMEM; 5433ab1d848fSNigel Hislop goto out_free; 5434ab1d848fSNigel Hislop } 5435ab1d848fSNigel Hislop 5436ab1d848fSNigel Hislop /* get syscall header from user space */ 5437ab1d848fSNigel Hislop rc = -EFAULT; 5438ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5439ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5440ab1d848fSNigel Hislop usrparm.psf_data_len)) 5441ab1d848fSNigel Hislop goto out_free; 544252898025SNigel Hislop psf0 = psf_data[0]; 544352898025SNigel Hislop psf1 = psf_data[1]; 5444ab1d848fSNigel Hislop 5445ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5446c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5447ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5448fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5449ab1d848fSNigel Hislop "Could not allocate initialization request"); 5450ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5451ab1d848fSNigel Hislop goto out_free; 5452ab1d848fSNigel Hislop } 5453ab1d848fSNigel Hislop 5454ab1d848fSNigel Hislop cqr->startdev = device; 5455ab1d848fSNigel Hislop cqr->memdev = device; 5456ab1d848fSNigel Hislop cqr->retries = 3; 5457ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 54581aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5459ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5460ab1d848fSNigel Hislop 5461ab1d848fSNigel Hislop /* Build the ccws */ 5462ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5463ab1d848fSNigel Hislop 5464ab1d848fSNigel Hislop /* PSF ccw */ 5465ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5466ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5467ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5468b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(psf_data); 5469ab1d848fSNigel Hislop 5470ab1d848fSNigel Hislop ccw++; 5471ab1d848fSNigel Hislop 5472ab1d848fSNigel Hislop /* RSSD ccw */ 5473ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5474ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5475ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5476b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(rssd_result); 5477ab1d848fSNigel Hislop 5478ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5479ab1d848fSNigel Hislop if (rc) 5480ab1d848fSNigel Hislop goto out_sfree; 5481ab1d848fSNigel Hislop 5482ab1d848fSNigel Hislop rc = -EFAULT; 5483ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5484ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5485ab1d848fSNigel Hislop goto out_sfree; 5486ab1d848fSNigel Hislop rc = 0; 5487ab1d848fSNigel Hislop 5488ab1d848fSNigel Hislop out_sfree: 5489ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5490ab1d848fSNigel Hislop out_free: 5491ab1d848fSNigel Hislop kfree(rssd_result); 5492ab1d848fSNigel Hislop kfree(psf_data); 5493ab1d848fSNigel Hislop out: 549452898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 549552898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 549652898025SNigel Hislop (int) psf0, (int) psf1, rc); 5497ab1d848fSNigel Hislop return rc; 5498ab1d848fSNigel Hislop } 5499ab1d848fSNigel Hislop 55001107ccfbSChristoph Hellwig static int 55018e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 55021107ccfbSChristoph Hellwig { 55038e09f215SStefan Weinhuber struct dasd_device *device = block->base; 55048e09f215SStefan Weinhuber 55051107ccfbSChristoph Hellwig switch (cmd) { 55061107ccfbSChristoph Hellwig case BIODASDGATTR: 55071107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 55081107ccfbSChristoph Hellwig case BIODASDSATTR: 55091107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 55101107ccfbSChristoph Hellwig case BIODASDPSRD: 55111107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 55121107ccfbSChristoph Hellwig case BIODASDRLSE: 55131107ccfbSChristoph Hellwig return dasd_eckd_release(device); 55141107ccfbSChristoph Hellwig case BIODASDRSRV: 55151107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 55161107ccfbSChristoph Hellwig case BIODASDSLCK: 55171107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5518196339f1SStefan Weinhuber case BIODASDSNID: 5519196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5520ab1d848fSNigel Hislop case BIODASDSYMMIO: 5521ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 55221107ccfbSChristoph Hellwig default: 55236b79d14eSHeiko Carstens return -ENOTTY; 55241107ccfbSChristoph Hellwig } 55251107ccfbSChristoph Hellwig } 55261107ccfbSChristoph Hellwig 55271da177e4SLinus Torvalds /* 5528445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5529445b5b49SHorst Hummel * and return number of printed chars. 5530445b5b49SHorst Hummel */ 5531b49e648fSStefan Haberland static void 5532445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5533445b5b49SHorst Hummel { 5534445b5b49SHorst Hummel int len, count; 5535445b5b49SHorst Hummel char *datap; 5536445b5b49SHorst Hummel 5537445b5b49SHorst Hummel len = 0; 5538445b5b49SHorst Hummel while (from <= to) { 5539773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5540445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5541445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5542445b5b49SHorst Hummel 5543445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5544445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5545b87c52e4SAlexander Gordeev datap = (char *)*((addr_t *)phys_to_virt(from->cda)); 5546445b5b49SHorst Hummel else 5547b87c52e4SAlexander Gordeev datap = phys_to_virt(from->cda); 5548445b5b49SHorst Hummel 5549b49e648fSStefan Haberland /* dump data (max 128 bytes) */ 5550b49e648fSStefan Haberland for (count = 0; count < from->count && count < 128; count++) { 5551b49e648fSStefan Haberland if (count % 32 == 0) 5552b49e648fSStefan Haberland len += sprintf(page + len, "\n"); 5553b49e648fSStefan Haberland if (count % 8 == 0) 5554b49e648fSStefan Haberland len += sprintf(page + len, " "); 5555b49e648fSStefan Haberland if (count % 4 == 0) 5556b49e648fSStefan Haberland len += sprintf(page + len, " "); 5557445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5558445b5b49SHorst Hummel } 5559445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5560445b5b49SHorst Hummel from++; 5561445b5b49SHorst Hummel } 5562b49e648fSStefan Haberland if (len > 0) 5563b49e648fSStefan Haberland printk(KERN_ERR "%s", page); 5564445b5b49SHorst Hummel } 5565445b5b49SHorst Hummel 5566fc19f381SStefan Haberland static void 5567aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5568aeec92caSStefan Haberland char *reason) 5569fc19f381SStefan Haberland { 5570fc19f381SStefan Haberland u64 *sense; 5571a5a0061fSStefan Weinhuber u64 *stat; 5572fc19f381SStefan Haberland 5573aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5574a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5575fc19f381SStefan Haberland if (sense) { 5576a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5577a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5578a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5579ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5580fc19f381SStefan Haberland } else { 5581a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5582a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5583a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5584fc19f381SStefan Haberland } 5585fc19f381SStefan Haberland } 5586fc19f381SStefan Haberland 5587445b5b49SHorst Hummel /* 55881da177e4SLinus Torvalds * Print sense data and related channel program. 55891da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 55901da177e4SLinus Torvalds */ 5591f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 55928e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 55931da177e4SLinus Torvalds { 55941da177e4SLinus Torvalds char *page; 5595445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5596445b5b49SHorst Hummel int len, sl, sct; 55971da177e4SLinus Torvalds 55981da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 55991da177e4SLinus Torvalds if (page == NULL) { 5600fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5601fc19f381SStefan Haberland "No memory to dump sense data\n"); 56021da177e4SLinus Torvalds return; 56031da177e4SLinus Torvalds } 5604445b5b49SHorst Hummel /* dump the sense data */ 5605773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 56061da177e4SLinus Torvalds " I/O status report for device %s:\n", 56072a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5608773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5609a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5610a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5611a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5612a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5613a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5614a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5615773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 56161da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 56172a0217d5SKay Sievers dev_name(&device->cdev->dev), 5618b87c52e4SAlexander Gordeev phys_to_virt(irb->scsw.cmd.cpa)); 56191da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 56201da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5621773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 56221da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 56231da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 56241da177e4SLinus Torvalds 56251da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 56261da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 56271da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 56281da177e4SLinus Torvalds } 56291da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 56301da177e4SLinus Torvalds } 56311da177e4SLinus Torvalds 56321da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 56331da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5634773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 56351da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 56361da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 56371da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 56381da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 56391da177e4SLinus Torvalds } else { 56401da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5641773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 56421da177e4SLinus Torvalds " 32 Byte: Format: %x " 56431da177e4SLinus Torvalds "Exception class %x\n", 56441da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 56451da177e4SLinus Torvalds } 56461da177e4SLinus Torvalds } else { 5647773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 56481da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 56491da177e4SLinus Torvalds } 5650773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 56511da177e4SLinus Torvalds 56528e09f215SStefan Weinhuber if (req) { 56538e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5654445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5655b49e648fSStefan Haberland /* Count CCW and print first CCWs (maximum 7) */ 5656445b5b49SHorst Hummel first = req->cpaddr; 5657445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5658445b5b49SHorst Hummel to = min(first + 6, last); 5659b49e648fSStefan Haberland printk(KERN_ERR PRINTK_HEADER " Related CP in req: %p\n", req); 5660b49e648fSStefan Haberland dasd_eckd_dump_ccw_range(first, to, page); 56611da177e4SLinus Torvalds 5662445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5663445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 5664445b5b49SHorst Hummel from = ++to; 5665b87c52e4SAlexander Gordeev fail = phys_to_virt(irb->scsw.cmd.cpa); /* failing CCW */ 5666445b5b49SHorst Hummel if (from < fail - 2) { 5667445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5668b49e648fSStefan Haberland printk(KERN_ERR PRINTK_HEADER "......\n"); 56691da177e4SLinus Torvalds } 5670445b5b49SHorst Hummel to = min(fail + 1, last); 5671b49e648fSStefan Haberland dasd_eckd_dump_ccw_range(from, to, page + len); 56721da177e4SLinus Torvalds 5673445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5674b49e648fSStefan Haberland len = 0; 5675445b5b49SHorst Hummel from = max(from, ++to); 5676445b5b49SHorst Hummel if (from < last - 1) { 5677445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5678b49e648fSStefan Haberland printk(KERN_ERR PRINTK_HEADER "......\n"); 56791da177e4SLinus Torvalds } 5680b49e648fSStefan Haberland dasd_eckd_dump_ccw_range(from, last, page + len); 56818e09f215SStefan Weinhuber } 56821da177e4SLinus Torvalds free_page((unsigned long) page); 56831da177e4SLinus Torvalds } 56841da177e4SLinus Torvalds 5685f3eb5384SStefan Weinhuber 5686f3eb5384SStefan Weinhuber /* 5687f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5688f3eb5384SStefan Weinhuber */ 5689f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5690f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5691f3eb5384SStefan Weinhuber { 5692f3eb5384SStefan Weinhuber char *page; 5693f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5694f3eb5384SStefan Weinhuber struct tsb *tsb; 5695ef19298bSStefan Weinhuber u8 *sense, *rcq; 5696f3eb5384SStefan Weinhuber 5697f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5698f3eb5384SStefan Weinhuber if (page == NULL) { 5699fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5700f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5701f3eb5384SStefan Weinhuber return; 5702f3eb5384SStefan Weinhuber } 5703f3eb5384SStefan Weinhuber /* dump the sense data */ 5704773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5705f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5706f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5707773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5708a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5709a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5710a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5711a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5712a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5713a521b048SStefan Haberland irb->scsw.tm.fcxs, 5714a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5715a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5716773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5717f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5718f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5719b87c52e4SAlexander Gordeev phys_to_virt(irb->scsw.tm.tcw)); 5720f3eb5384SStefan Weinhuber 5721f3eb5384SStefan Weinhuber tsb = NULL; 5722f3eb5384SStefan Weinhuber sense = NULL; 5723a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5724b87c52e4SAlexander Gordeev tsb = tcw_get_tsb(phys_to_virt(irb->scsw.tm.tcw)); 5725f3eb5384SStefan Weinhuber 5726b8fde722SStefan Haberland if (tsb) { 5727773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5728f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5729773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5730f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5731773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5732f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5733773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5734f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5735f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5736773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5737f3eb5384SStefan Weinhuber " residual %d\n", residual); 5738f3eb5384SStefan Weinhuber 5739f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5740f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5741773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5742f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5743f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5744773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5745f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5746f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5747773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5748f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5749f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5750773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5751f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5752f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5753773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5754f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5755f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5756f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5757f3eb5384SStefan Weinhuber break; 5758f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5759773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5760f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5761ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5762773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5763ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5764ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5765ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5766f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5767f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5768ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5769f3eb5384SStefan Weinhuber } 5770f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5771f3eb5384SStefan Weinhuber } 5772f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5773f3eb5384SStefan Weinhuber break; 5774f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5775773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 57768693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5777f3eb5384SStefan Weinhuber break; 5778f3eb5384SStefan Weinhuber } 5779f3eb5384SStefan Weinhuber 5780f3eb5384SStefan Weinhuber if (sense) { 5781f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5782773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5783f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5784f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5785f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5786f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5787f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5788f3eb5384SStefan Weinhuber } 5789f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5790f3eb5384SStefan Weinhuber } 5791f3eb5384SStefan Weinhuber 5792f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5793f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5794773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5795f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5796f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5797f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5798f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5799f3eb5384SStefan Weinhuber } else { 5800f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5801773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5802f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5803f3eb5384SStefan Weinhuber "Exception class %x\n", 5804f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5805f3eb5384SStefan Weinhuber } 5806f3eb5384SStefan Weinhuber } else { 5807773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5808f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5809f3eb5384SStefan Weinhuber } 5810f3eb5384SStefan Weinhuber } else { 5811773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5812f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5813f3eb5384SStefan Weinhuber } 5814773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5815f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5816f3eb5384SStefan Weinhuber } 5817f3eb5384SStefan Weinhuber 5818f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5819f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5820f3eb5384SStefan Weinhuber { 58218fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 58228fd57520SJan Höppner 58238fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 58248fd57520SJan Höppner /* 58258fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 58268fd57520SJan Höppner * error might be expected and log messages shouldn't be written 58278fd57520SJan Höppner * then. Check if the according suppress bit is set. 58288fd57520SJan Höppner */ 58298fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 58308fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 58318fd57520SJan Höppner return; 58328fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 58338fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 58348fd57520SJan Höppner return; 58358fd57520SJan Höppner 5836f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 58378fd57520SJan Höppner } else { 58388fd57520SJan Höppner /* 5839ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5840ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5841ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 58428fd57520SJan Höppner */ 5843ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5844ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5845ab24fbd3SStefan Haberland return; 5846ab24fbd3SStefan Haberland 58478fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 58488fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 58498fd57520SJan Höppner return; 58508fd57520SJan Höppner 5851f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5852f3eb5384SStefan Weinhuber } 58538fd57520SJan Höppner } 5854f3eb5384SStefan Weinhuber 5855501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5856501183f2SStefan Haberland { 5857543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5858501183f2SStefan Haberland int rc, old_base; 58592dedf0d9SStefan Haberland char print_uid[60]; 58602dedf0d9SStefan Haberland struct dasd_uid uid; 58612dedf0d9SStefan Haberland unsigned long flags; 5862501183f2SStefan Haberland 586359a9ed5fSStefan Haberland /* 586459a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 586559a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 586659a9ed5fSStefan Haberland */ 586759a9ed5fSStefan Haberland dasd_alias_remove_device(device); 586859a9ed5fSStefan Haberland 58692dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5870501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 58712dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 58722dedf0d9SStefan Haberland 5873501183f2SStefan Haberland /* Read Configuration Data */ 5874501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5875501183f2SStefan Haberland if (rc) 5876501183f2SStefan Haberland goto out_err; 5877501183f2SStefan Haberland 587874e2f211SStefan Haberland dasd_eckd_read_fc_security(device); 587974e2f211SStefan Haberland 58802dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5881501183f2SStefan Haberland if (rc) 5882501183f2SStefan Haberland goto out_err; 5883501183f2SStefan Haberland /* 5884501183f2SStefan Haberland * update unit address configuration and 5885501183f2SStefan Haberland * add device to alias management 5886501183f2SStefan Haberland */ 5887501183f2SStefan Haberland dasd_alias_update_add_device(device); 5888501183f2SStefan Haberland 58892dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 58902dedf0d9SStefan Haberland 58912dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 5892542e30ceSStefan Haberland dasd_eckd_get_uid_string(&private->conf, print_uid); 5893501183f2SStefan Haberland dev_info(&device->cdev->dev, 5894501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 58952dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5896501183f2SStefan Haberland } 5897501183f2SStefan Haberland return 0; 5898501183f2SStefan Haberland 5899501183f2SStefan Haberland out_err: 5900501183f2SStefan Haberland return -1; 5901501183f2SStefan Haberland } 5902501183f2SStefan Haberland 59035db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 59045db8440cSStefan Haberland struct dasd_rssd_messages *messages, 59055db8440cSStefan Haberland __u8 lpum) 59065db8440cSStefan Haberland { 59075db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 59085db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 59095db8440cSStefan Haberland struct dasd_ccw_req *cqr; 59105db8440cSStefan Haberland struct ccw1 *ccw; 59115db8440cSStefan Haberland int rc; 59125db8440cSStefan Haberland 59135db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 59145db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 59155db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5916c5205f2fSSebastian Ott device, NULL); 59175db8440cSStefan Haberland if (IS_ERR(cqr)) { 59185db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59195db8440cSStefan Haberland "Could not allocate read message buffer request"); 59205db8440cSStefan Haberland return PTR_ERR(cqr); 59215db8440cSStefan Haberland } 59225db8440cSStefan Haberland 5923af775210SStefan Haberland cqr->lpm = lpum; 5924af775210SStefan Haberland retry: 59255db8440cSStefan Haberland cqr->startdev = device; 59265db8440cSStefan Haberland cqr->memdev = device; 59275db8440cSStefan Haberland cqr->block = NULL; 59285db8440cSStefan Haberland cqr->expires = 10 * HZ; 59295db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5930b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5931b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5932b179b037SStefan Haberland * do basic erp */ 5933b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5934b179b037SStefan Haberland cqr->retries = 256; 59355db8440cSStefan Haberland 59365db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 59375db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59385db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 59395db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 59405db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 59415db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 59425db8440cSStefan Haberland 59435db8440cSStefan Haberland ccw = cqr->cpaddr; 59445db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59455db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 59465db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 59475db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 5948b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(prssdp); 59495db8440cSStefan Haberland 59505db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 59515db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 59525db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 59535db8440cSStefan Haberland 59545db8440cSStefan Haberland ccw++; 59555db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 59565db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 59575db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 5958b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(message_buf); 59595db8440cSStefan Haberland 59605db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 59615db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 59625db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 59635db8440cSStefan Haberland if (rc == 0) { 59645db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59655db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 59665db8440cSStefan Haberland (prssdp + 1); 59675db8440cSStefan Haberland memcpy(messages, message_buf, 59685db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5969af775210SStefan Haberland } else if (cqr->lpm) { 5970af775210SStefan Haberland /* 5971af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5972af775210SStefan Haberland * but instead we get the required information on any path 5973af775210SStefan Haberland * so retry with open path mask 5974af775210SStefan Haberland */ 5975af775210SStefan Haberland cqr->lpm = 0; 5976af775210SStefan Haberland goto retry; 59775db8440cSStefan Haberland } else 59785db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 59795db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 59805db8440cSStefan Haberland , rc); 59815db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59825db8440cSStefan Haberland return rc; 59835db8440cSStefan Haberland } 59845db8440cSStefan Haberland 59855a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 59865a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 59875a3b7b11SStefan Haberland { 59885a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 59895a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 59905a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 59915a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 59925a3b7b11SStefan Haberland struct ccw1 *ccw; 59935a3b7b11SStefan Haberland int rc; 59945a3b7b11SStefan Haberland 59955a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 59965a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 59975a3b7b11SStefan Haberland return -EOPNOTSUPP; 59985a3b7b11SStefan Haberland 5999ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 6000ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 6001ccd53fa2SStefan Haberland return -EOPNOTSUPP; 6002ccd53fa2SStefan Haberland 60035a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 60045a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 6005c5205f2fSSebastian Ott device, NULL); 60065a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 60075a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60085a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 60095a3b7b11SStefan Haberland return PTR_ERR(cqr); 60105a3b7b11SStefan Haberland } 60115a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 60125a3b7b11SStefan Haberland if (!host_access) { 60135a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 60145a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60155a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 60165a3b7b11SStefan Haberland return -ENOMEM; 60175a3b7b11SStefan Haberland } 60185a3b7b11SStefan Haberland cqr->startdev = device; 60195a3b7b11SStefan Haberland cqr->memdev = device; 60205a3b7b11SStefan Haberland cqr->block = NULL; 60215a3b7b11SStefan Haberland cqr->retries = 256; 60225a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 60235a3b7b11SStefan Haberland 60245a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 60255a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 60265a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 60275a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 60285a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 60295a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 6030542e30ceSStefan Haberland prssdp->lss = private->conf.ned->ID; 6031542e30ceSStefan Haberland prssdp->volume = private->conf.ned->unit_addr; 60325a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 60335a3b7b11SStefan Haberland 60345a3b7b11SStefan Haberland ccw = cqr->cpaddr; 60355a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 60365a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 60375a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 60385a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 6039b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(prssdp); 60405a3b7b11SStefan Haberland 60415a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 60425a3b7b11SStefan Haberland ccw++; 60435a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 60445a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 60455a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 6046b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(host_access); 60475a3b7b11SStefan Haberland 60485a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 60495a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 6050ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 6051ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 6052f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 60535a3b7b11SStefan Haberland if (rc == 0) { 60545a3b7b11SStefan Haberland *data = *host_access; 60555a3b7b11SStefan Haberland } else { 60565a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 60575a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 60585a3b7b11SStefan Haberland rc); 60595a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 60605a3b7b11SStefan Haberland } 60615a3b7b11SStefan Haberland 60625a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 60635a3b7b11SStefan Haberland kfree(host_access); 60645a3b7b11SStefan Haberland return rc; 60655a3b7b11SStefan Haberland } 60665a3b7b11SStefan Haberland /* 60675a3b7b11SStefan Haberland * return number of grouped devices 60685a3b7b11SStefan Haberland */ 60695a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 60705a3b7b11SStefan Haberland { 60715a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60725a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60735a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60745a3b7b11SStefan Haberland int count = 0; 60755a3b7b11SStefan Haberland int rc, i; 60765a3b7b11SStefan Haberland 60775a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60785a3b7b11SStefan Haberland if (!access) { 60795a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60805a3b7b11SStefan Haberland "Could not allocate access buffer"); 60815a3b7b11SStefan Haberland return -ENOMEM; 60825a3b7b11SStefan Haberland } 60835a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60845a3b7b11SStefan Haberland if (rc) { 60855a3b7b11SStefan Haberland kfree(access); 60865a3b7b11SStefan Haberland return rc; 60875a3b7b11SStefan Haberland } 60885a3b7b11SStefan Haberland 60895a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60905a3b7b11SStefan Haberland access->host_access_information; 60915a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 60925a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 60935a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 60945a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 60955a3b7b11SStefan Haberland count++; 60965a3b7b11SStefan Haberland } 60975a3b7b11SStefan Haberland 60985a3b7b11SStefan Haberland kfree(access); 60995a3b7b11SStefan Haberland return count; 61005a3b7b11SStefan Haberland } 61015a3b7b11SStefan Haberland 61025a3b7b11SStefan Haberland /* 61035a3b7b11SStefan Haberland * write host access information to a sequential file 61045a3b7b11SStefan Haberland */ 61055a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 61065a3b7b11SStefan Haberland { 61075a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 61085a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 61095a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 61105a3b7b11SStefan Haberland char sysplex[9] = ""; 6111c7848e14SChristophe JAILLET int rc, i; 61125a3b7b11SStefan Haberland 61135a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 61145a3b7b11SStefan Haberland if (!access) { 61155a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 61165a3b7b11SStefan Haberland "Could not allocate access buffer"); 61175a3b7b11SStefan Haberland return -ENOMEM; 61185a3b7b11SStefan Haberland } 61195a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 61205a3b7b11SStefan Haberland if (rc) { 61215a3b7b11SStefan Haberland kfree(access); 61225a3b7b11SStefan Haberland return rc; 61235a3b7b11SStefan Haberland } 61245a3b7b11SStefan Haberland 61255a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 61265a3b7b11SStefan Haberland access->host_access_information; 61275a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 61285a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 61295a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 61305a3b7b11SStefan Haberland /* PGID */ 6131c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 61325a3b7b11SStefan Haberland /* FLAGS */ 61335a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 61345a3b7b11SStefan Haberland /* SYSPLEX NAME */ 61355a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 61365a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 61375a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 61385a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 61395a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 61405a3b7b11SStefan Haberland /* TIMESTAMP */ 61415a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 61425a3b7b11SStefan Haberland entry->timestamp); 61435a3b7b11SStefan Haberland } 61445a3b7b11SStefan Haberland kfree(access); 61455a3b7b11SStefan Haberland 61465a3b7b11SStefan Haberland return 0; 61475a3b7b11SStefan Haberland } 61485a3b7b11SStefan Haberland 6149413862caSStefan Haberland static struct dasd_device 6150413862caSStefan Haberland *copy_relation_find_device(struct dasd_copy_relation *copy, 6151413862caSStefan Haberland char *busid) 6152413862caSStefan Haberland { 6153413862caSStefan Haberland int i; 6154413862caSStefan Haberland 6155413862caSStefan Haberland for (i = 0; i < DASD_CP_ENTRIES; i++) { 6156413862caSStefan Haberland if (copy->entry[i].configured && 6157413862caSStefan Haberland strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) 6158413862caSStefan Haberland return copy->entry[i].device; 6159413862caSStefan Haberland } 6160413862caSStefan Haberland return NULL; 6161413862caSStefan Haberland } 6162413862caSStefan Haberland 6163413862caSStefan Haberland /* 6164413862caSStefan Haberland * set the new active/primary device 6165413862caSStefan Haberland */ 6166413862caSStefan Haberland static void copy_pair_set_active(struct dasd_copy_relation *copy, char *new_busid, 6167413862caSStefan Haberland char *old_busid) 6168413862caSStefan Haberland { 6169413862caSStefan Haberland int i; 6170413862caSStefan Haberland 6171413862caSStefan Haberland for (i = 0; i < DASD_CP_ENTRIES; i++) { 6172413862caSStefan Haberland if (copy->entry[i].configured && 6173413862caSStefan Haberland strncmp(copy->entry[i].busid, new_busid, 6174413862caSStefan Haberland DASD_BUS_ID_SIZE) == 0) { 6175413862caSStefan Haberland copy->active = ©->entry[i]; 6176413862caSStefan Haberland copy->entry[i].primary = true; 6177413862caSStefan Haberland } else if (copy->entry[i].configured && 6178413862caSStefan Haberland strncmp(copy->entry[i].busid, old_busid, 6179413862caSStefan Haberland DASD_BUS_ID_SIZE) == 0) { 6180413862caSStefan Haberland copy->entry[i].primary = false; 6181413862caSStefan Haberland } 6182413862caSStefan Haberland } 6183413862caSStefan Haberland } 6184413862caSStefan Haberland 6185413862caSStefan Haberland /* 6186413862caSStefan Haberland * The function will swap the role of a given copy pair. 6187413862caSStefan Haberland * During the swap operation the relation of the blockdevice is disconnected 6188413862caSStefan Haberland * from the old primary and connected to the new. 6189413862caSStefan Haberland * 6190413862caSStefan Haberland * IO is paused on the block queue before swap and may be resumed afterwards. 6191413862caSStefan Haberland */ 6192413862caSStefan Haberland static int dasd_eckd_copy_pair_swap(struct dasd_device *device, char *prim_busid, 6193413862caSStefan Haberland char *sec_busid) 6194413862caSStefan Haberland { 6195413862caSStefan Haberland struct dasd_device *primary, *secondary; 6196413862caSStefan Haberland struct dasd_copy_relation *copy; 6197413862caSStefan Haberland struct dasd_block *block; 6198413862caSStefan Haberland struct gendisk *gdp; 6199413862caSStefan Haberland 6200413862caSStefan Haberland copy = device->copy; 6201413862caSStefan Haberland if (!copy) 6202413862caSStefan Haberland return DASD_COPYPAIRSWAP_INVALID; 6203413862caSStefan Haberland primary = copy->active->device; 6204413862caSStefan Haberland if (!primary) 6205413862caSStefan Haberland return DASD_COPYPAIRSWAP_INVALID; 6206413862caSStefan Haberland /* double check if swap has correct primary */ 6207413862caSStefan Haberland if (strncmp(dev_name(&primary->cdev->dev), prim_busid, DASD_BUS_ID_SIZE) != 0) 6208413862caSStefan Haberland return DASD_COPYPAIRSWAP_PRIMARY; 6209413862caSStefan Haberland 6210413862caSStefan Haberland secondary = copy_relation_find_device(copy, sec_busid); 6211413862caSStefan Haberland if (!secondary) 6212413862caSStefan Haberland return DASD_COPYPAIRSWAP_SECONDARY; 6213413862caSStefan Haberland 6214413862caSStefan Haberland /* 6215413862caSStefan Haberland * usually the device should be quiesced for swap 6216413862caSStefan Haberland * for paranoia stop device and requeue requests again 6217413862caSStefan Haberland */ 6218413862caSStefan Haberland dasd_device_set_stop_bits(primary, DASD_STOPPED_PPRC); 6219413862caSStefan Haberland dasd_device_set_stop_bits(secondary, DASD_STOPPED_PPRC); 6220413862caSStefan Haberland dasd_generic_requeue_all_requests(primary); 6221413862caSStefan Haberland 6222413862caSStefan Haberland /* swap DASD internal device <> block assignment */ 6223413862caSStefan Haberland block = primary->block; 6224413862caSStefan Haberland primary->block = NULL; 6225413862caSStefan Haberland secondary->block = block; 6226413862caSStefan Haberland block->base = secondary; 6227413862caSStefan Haberland /* set new primary device in COPY relation */ 6228413862caSStefan Haberland copy_pair_set_active(copy, sec_busid, prim_busid); 6229413862caSStefan Haberland 6230413862caSStefan Haberland /* swap blocklayer device link */ 6231413862caSStefan Haberland gdp = block->gdp; 6232413862caSStefan Haberland dasd_add_link_to_gendisk(gdp, secondary); 6233413862caSStefan Haberland 6234413862caSStefan Haberland /* re-enable device */ 6235413862caSStefan Haberland dasd_device_remove_stop_bits(primary, DASD_STOPPED_PPRC); 6236413862caSStefan Haberland dasd_device_remove_stop_bits(secondary, DASD_STOPPED_PPRC); 6237413862caSStefan Haberland dasd_schedule_device_bh(secondary); 6238413862caSStefan Haberland 6239413862caSStefan Haberland return DASD_COPYPAIRSWAP_SUCCESS; 6240413862caSStefan Haberland } 6241413862caSStefan Haberland 62425db8440cSStefan Haberland /* 62433f217cceSStefan Haberland * Perform Subsystem Function - Peer-to-Peer Remote Copy Extended Query 62443f217cceSStefan Haberland */ 62453f217cceSStefan Haberland static int dasd_eckd_query_pprc_status(struct dasd_device *device, 62463f217cceSStefan Haberland struct dasd_pprc_data_sc4 *data) 62473f217cceSStefan Haberland { 62483f217cceSStefan Haberland struct dasd_pprc_data_sc4 *pprc_data; 62493f217cceSStefan Haberland struct dasd_psf_prssd_data *prssdp; 62503f217cceSStefan Haberland struct dasd_ccw_req *cqr; 62513f217cceSStefan Haberland struct ccw1 *ccw; 62523f217cceSStefan Haberland int rc; 62533f217cceSStefan Haberland 62543f217cceSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 62553f217cceSStefan Haberland sizeof(*prssdp) + sizeof(*pprc_data) + 1, 62563f217cceSStefan Haberland device, NULL); 62573f217cceSStefan Haberland if (IS_ERR(cqr)) { 62583f217cceSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 62593f217cceSStefan Haberland "Could not allocate query PPRC status request"); 62603f217cceSStefan Haberland return PTR_ERR(cqr); 62613f217cceSStefan Haberland } 62623f217cceSStefan Haberland cqr->startdev = device; 62633f217cceSStefan Haberland cqr->memdev = device; 62643f217cceSStefan Haberland cqr->block = NULL; 62653f217cceSStefan Haberland cqr->retries = 256; 62663f217cceSStefan Haberland cqr->expires = 10 * HZ; 62673f217cceSStefan Haberland 62683f217cceSStefan Haberland /* Prepare for Read Subsystem Data */ 62693f217cceSStefan Haberland prssdp = (struct dasd_psf_prssd_data *)cqr->data; 62703f217cceSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 62713f217cceSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 62723f217cceSStefan Haberland prssdp->suborder = PSF_SUBORDER_PPRCEQ; 62733f217cceSStefan Haberland prssdp->varies[0] = PPRCEQ_SCOPE_4; 62743f217cceSStefan Haberland pprc_data = (struct dasd_pprc_data_sc4 *)(prssdp + 1); 62753f217cceSStefan Haberland 62763f217cceSStefan Haberland ccw = cqr->cpaddr; 62773f217cceSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 62783f217cceSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 62793f217cceSStefan Haberland ccw->flags |= CCW_FLAG_CC; 62803f217cceSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 62813f217cceSStefan Haberland ccw->cda = (__u32)(addr_t)prssdp; 62823f217cceSStefan Haberland 62833f217cceSStefan Haberland /* Read Subsystem Data - query host access */ 62843f217cceSStefan Haberland ccw++; 62853f217cceSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 62863f217cceSStefan Haberland ccw->count = sizeof(*pprc_data); 62873f217cceSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 62883f217cceSStefan Haberland ccw->cda = (__u32)(addr_t)pprc_data; 62893f217cceSStefan Haberland 62903f217cceSStefan Haberland cqr->buildclk = get_tod_clock(); 62913f217cceSStefan Haberland cqr->status = DASD_CQR_FILLED; 62923f217cceSStefan Haberland 62933f217cceSStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 62943f217cceSStefan Haberland if (rc == 0) { 62953f217cceSStefan Haberland *data = *pprc_data; 62963f217cceSStefan Haberland } else { 62973f217cceSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 62983f217cceSStefan Haberland "PPRC Extended Query failed with rc=%d\n", 62993f217cceSStefan Haberland rc); 63003f217cceSStefan Haberland rc = -EOPNOTSUPP; 63013f217cceSStefan Haberland } 63023f217cceSStefan Haberland 63033f217cceSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 63043f217cceSStefan Haberland return rc; 63053f217cceSStefan Haberland } 63063f217cceSStefan Haberland 63073f217cceSStefan Haberland /* 630832ff8ce0SStefan Haberland * ECKD NOP - no operation 630932ff8ce0SStefan Haberland */ 631032ff8ce0SStefan Haberland static int dasd_eckd_nop(struct dasd_device *device) 631132ff8ce0SStefan Haberland { 631232ff8ce0SStefan Haberland struct dasd_ccw_req *cqr; 631332ff8ce0SStefan Haberland struct ccw1 *ccw; 631432ff8ce0SStefan Haberland int rc; 631532ff8ce0SStefan Haberland 631632ff8ce0SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 1, device, NULL); 631732ff8ce0SStefan Haberland if (IS_ERR(cqr)) { 631832ff8ce0SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 631932ff8ce0SStefan Haberland "Could not allocate NOP request"); 632032ff8ce0SStefan Haberland return PTR_ERR(cqr); 632132ff8ce0SStefan Haberland } 632232ff8ce0SStefan Haberland cqr->startdev = device; 632332ff8ce0SStefan Haberland cqr->memdev = device; 632432ff8ce0SStefan Haberland cqr->block = NULL; 632532ff8ce0SStefan Haberland cqr->retries = 1; 632632ff8ce0SStefan Haberland cqr->expires = 10 * HZ; 632732ff8ce0SStefan Haberland 632832ff8ce0SStefan Haberland ccw = cqr->cpaddr; 632932ff8ce0SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_NOP; 633032ff8ce0SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 633132ff8ce0SStefan Haberland 633232ff8ce0SStefan Haberland cqr->buildclk = get_tod_clock(); 633332ff8ce0SStefan Haberland cqr->status = DASD_CQR_FILLED; 633432ff8ce0SStefan Haberland 633532ff8ce0SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 633632ff8ce0SStefan Haberland if (rc != 0) { 633732ff8ce0SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 633832ff8ce0SStefan Haberland "NOP failed with rc=%d\n", rc); 633932ff8ce0SStefan Haberland rc = -EOPNOTSUPP; 634032ff8ce0SStefan Haberland } 634132ff8ce0SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 634232ff8ce0SStefan Haberland return rc; 634332ff8ce0SStefan Haberland } 634432ff8ce0SStefan Haberland 634532ff8ce0SStefan Haberland static int dasd_eckd_device_ping(struct dasd_device *device) 634632ff8ce0SStefan Haberland { 634732ff8ce0SStefan Haberland return dasd_eckd_nop(device); 634832ff8ce0SStefan Haberland } 634932ff8ce0SStefan Haberland 635032ff8ce0SStefan Haberland /* 63515db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 63525db8440cSStefan Haberland */ 63535db8440cSStefan Haberland static int 63545db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6355a521b048SStefan Haberland __u32 message_id, __u8 lpum) 63565db8440cSStefan Haberland { 63575db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 6358a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 63595db8440cSStefan Haberland struct dasd_ccw_req *cqr; 63605db8440cSStefan Haberland struct ccw1 *ccw; 63615db8440cSStefan Haberland int rc; 63625db8440cSStefan Haberland 63635db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 63645db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 6365c5205f2fSSebastian Ott device, NULL); 63665db8440cSStefan Haberland 63675db8440cSStefan Haberland if (IS_ERR(cqr)) { 63685db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 63695db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 63705db8440cSStefan Haberland return PTR_ERR(cqr); 63715db8440cSStefan Haberland } 63725db8440cSStefan Haberland 63735db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 63745db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 63755db8440cSStefan Haberland psf_cuir->cc = response; 6376a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 63775db8440cSStefan Haberland psf_cuir->message_id = message_id; 6378a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 6379a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 63805db8440cSStefan Haberland ccw = cqr->cpaddr; 63815db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 6382b87c52e4SAlexander Gordeev ccw->cda = (__u32)virt_to_phys(psf_cuir); 6383b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 63845db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 63855db8440cSStefan Haberland 63865db8440cSStefan Haberland cqr->startdev = device; 63875db8440cSStefan Haberland cqr->memdev = device; 63885db8440cSStefan Haberland cqr->block = NULL; 63895db8440cSStefan Haberland cqr->retries = 256; 63905db8440cSStefan Haberland cqr->expires = 10*HZ; 63915db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 63925db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 6393b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 63945db8440cSStefan Haberland 63955db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 63965db8440cSStefan Haberland 63975db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 63985db8440cSStefan Haberland return rc; 63995db8440cSStefan Haberland } 64005db8440cSStefan Haberland 6401b179b037SStefan Haberland /* 6402b179b037SStefan Haberland * return configuration data that is referenced by record selector 6403b179b037SStefan Haberland * if a record selector is specified or per default return the 6404b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 6405b179b037SStefan Haberland */ 6406b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6407b179b037SStefan Haberland __u8 lpum, 6408b179b037SStefan Haberland struct dasd_cuir_message *cuir) 64095db8440cSStefan Haberland { 6410b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6411b179b037SStefan Haberland int path, pos; 64125db8440cSStefan Haberland 6413b179b037SStefan Haberland if (cuir->record_selector == 0) 6414b179b037SStefan Haberland goto out; 6415b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6416c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 6417b179b037SStefan Haberland if (conf_data->gneq.record_selector == 6418b179b037SStefan Haberland cuir->record_selector) 6419b179b037SStefan Haberland return conf_data; 64205db8440cSStefan Haberland } 6421b179b037SStefan Haberland out: 6422c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 64235db8440cSStefan Haberland } 64245db8440cSStefan Haberland 64255db8440cSStefan Haberland /* 6426b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6427b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6428b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6429b179b037SStefan Haberland * 6430b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6431b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6432b179b037SStefan Haberland * on. 6433b179b037SStefan Haberland */ 6434b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6435b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6436b179b037SStefan Haberland { 6437b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6438b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6439b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6440b179b037SStefan Haberland unsigned int pos, path; 6441b179b037SStefan Haberland char *ref_gneq, *gneq; 6442b179b037SStefan Haberland char *ref_ned, *ned; 6443b179b037SStefan Haberland int tbcpm = 0; 6444b179b037SStefan Haberland 6445b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6446b179b037SStefan Haberland the attention message was presented on */ 6447b179b037SStefan Haberland if (!cuir->ned_map || 6448b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6449b179b037SStefan Haberland return lpum; 6450b179b037SStefan Haberland 6451b179b037SStefan Haberland /* get reference conf data */ 6452b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6453b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6454b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6455b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6456b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6457b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6458b179b037SStefan Haberland mask = cuir->neq_map[2]; 6459b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6460b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6461b179b037SStefan Haberland 6462c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6463b179b037SStefan Haberland /* initialise data per path */ 6464b179b037SStefan Haberland bitmask = mask; 6465c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6466b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6467b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6468b179b037SStefan Haberland /* compare reference ned and per path ned */ 6469b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6470b179b037SStefan Haberland continue; 6471b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6472b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6473b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6474b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6475b179b037SStefan Haberland while (bitmask) { 6476b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6477b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6478b179b037SStefan Haberland != 0) 6479b179b037SStefan Haberland break; 6480b179b037SStefan Haberland clear_bit(pos, &bitmask); 6481b179b037SStefan Haberland } 6482b179b037SStefan Haberland if (bitmask) 6483b179b037SStefan Haberland continue; 6484b179b037SStefan Haberland /* device and path match the reference values 6485b179b037SStefan Haberland add path to CUIR scope */ 6486c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6487b179b037SStefan Haberland } 6488b179b037SStefan Haberland return tbcpm; 6489b179b037SStefan Haberland } 6490b179b037SStefan Haberland 6491b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6492a521b048SStefan Haberland unsigned long paths, int action) 6493b179b037SStefan Haberland { 6494b179b037SStefan Haberland int pos; 6495b179b037SStefan Haberland 6496b179b037SStefan Haberland while (paths) { 6497b179b037SStefan Haberland /* get position of bit in mask */ 6498a521b048SStefan Haberland pos = 8 - ffs(paths); 6499b179b037SStefan Haberland /* get channel path descriptor from this position */ 6500b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6501a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6502a521b048SStefan Haberland device->path[pos].cssid, 6503a521b048SStefan Haberland device->path[pos].chpid); 6504b179b037SStefan Haberland else if (action == CUIR_RESUME) 6505a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6506a521b048SStefan Haberland device->path[pos].cssid, 6507a521b048SStefan Haberland device->path[pos].chpid); 6508a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6509b179b037SStefan Haberland } 6510b179b037SStefan Haberland } 6511b179b037SStefan Haberland 6512b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6513b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6514b179b037SStefan Haberland { 6515b179b037SStefan Haberland unsigned long tbcpm; 6516b179b037SStefan Haberland 6517b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6518b179b037SStefan Haberland /* nothing to do if path is not in use */ 6519c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6520b179b037SStefan Haberland return 0; 6521c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6522b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6523b179b037SStefan Haberland return error */ 6524b179b037SStefan Haberland return -EINVAL; 6525b179b037SStefan Haberland } 6526b179b037SStefan Haberland /* remove device from operational path mask */ 6527c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6528c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6529b179b037SStefan Haberland return tbcpm; 6530b179b037SStefan Haberland } 6531b179b037SStefan Haberland 6532b179b037SStefan Haberland /* 6533b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6534b179b037SStefan Haberland * return an error if the last path to a device would be removed 65355db8440cSStefan Haberland * 65365db8440cSStefan Haberland * if only part of the devices are quiesced and an error 65375db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 65385db8440cSStefan Haberland * notify the already set offline devices again 65395db8440cSStefan Haberland */ 65405db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6541b179b037SStefan Haberland struct dasd_cuir_message *cuir) 65425db8440cSStefan Haberland { 6543543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 65445db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 65455db8440cSStefan Haberland struct dasd_device *dev, *n; 6546b179b037SStefan Haberland unsigned long paths = 0; 6547b179b037SStefan Haberland unsigned long flags; 6548b179b037SStefan Haberland int tbcpm; 65495db8440cSStefan Haberland 65505db8440cSStefan Haberland /* active devices */ 6551b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 65525db8440cSStefan Haberland alias_list) { 6553b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6554b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6555b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6556b179b037SStefan Haberland if (tbcpm < 0) 6557b179b037SStefan Haberland goto out_err; 6558b179b037SStefan Haberland paths |= tbcpm; 65595db8440cSStefan Haberland } 65605db8440cSStefan Haberland /* inactive devices */ 6561b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 65625db8440cSStefan Haberland alias_list) { 6563b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6564b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6565b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6566b179b037SStefan Haberland if (tbcpm < 0) 6567b179b037SStefan Haberland goto out_err; 6568b179b037SStefan Haberland paths |= tbcpm; 65695db8440cSStefan Haberland } 65705db8440cSStefan Haberland /* devices in PAV groups */ 65715db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 65725db8440cSStefan Haberland &private->lcu->grouplist, group) { 65735db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 65745db8440cSStefan Haberland alias_list) { 6575b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6576b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6577b179b037SStefan Haberland spin_unlock_irqrestore( 6578b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6579b179b037SStefan Haberland if (tbcpm < 0) 6580b179b037SStefan Haberland goto out_err; 6581b179b037SStefan Haberland paths |= tbcpm; 65825db8440cSStefan Haberland } 65835db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 65845db8440cSStefan Haberland alias_list) { 6585b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6586b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6587b179b037SStefan Haberland spin_unlock_irqrestore( 6588b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6589b179b037SStefan Haberland if (tbcpm < 0) 6590b179b037SStefan Haberland goto out_err; 6591b179b037SStefan Haberland paths |= tbcpm; 65925db8440cSStefan Haberland } 65935db8440cSStefan Haberland } 6594b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6595a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6596b179b037SStefan Haberland return 0; 6597b179b037SStefan Haberland out_err: 6598b179b037SStefan Haberland return tbcpm; 65995db8440cSStefan Haberland } 66005db8440cSStefan Haberland 66015db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6602b179b037SStefan Haberland struct dasd_cuir_message *cuir) 66035db8440cSStefan Haberland { 6604543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 66055db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 66065db8440cSStefan Haberland struct dasd_device *dev, *n; 6607b179b037SStefan Haberland unsigned long paths = 0; 6608b179b037SStefan Haberland int tbcpm; 66095db8440cSStefan Haberland 66105db8440cSStefan Haberland /* 66115db8440cSStefan Haberland * the path may have been added through a generic path event before 66125db8440cSStefan Haberland * only trigger path verification if the path is not already in use 66135db8440cSStefan Haberland */ 66145db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 66155db8440cSStefan Haberland &private->lcu->active_devices, 66165db8440cSStefan Haberland alias_list) { 6617b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6618b179b037SStefan Haberland paths |= tbcpm; 6619c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6620c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 66215db8440cSStefan Haberland dasd_schedule_device_bh(dev); 66225db8440cSStefan Haberland } 66235db8440cSStefan Haberland } 66245db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 66255db8440cSStefan Haberland &private->lcu->inactive_devices, 66265db8440cSStefan Haberland alias_list) { 6627b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6628b179b037SStefan Haberland paths |= tbcpm; 6629c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6630c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 66315db8440cSStefan Haberland dasd_schedule_device_bh(dev); 66325db8440cSStefan Haberland } 66335db8440cSStefan Haberland } 66345db8440cSStefan Haberland /* devices in PAV groups */ 66355db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 66365db8440cSStefan Haberland &private->lcu->grouplist, 66375db8440cSStefan Haberland group) { 66385db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 66395db8440cSStefan Haberland &pavgroup->baselist, 66405db8440cSStefan Haberland alias_list) { 6641b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6642b179b037SStefan Haberland paths |= tbcpm; 6643c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6644c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 66455db8440cSStefan Haberland dasd_schedule_device_bh(dev); 66465db8440cSStefan Haberland } 66475db8440cSStefan Haberland } 66485db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 66495db8440cSStefan Haberland &pavgroup->aliaslist, 66505db8440cSStefan Haberland alias_list) { 6651b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6652b179b037SStefan Haberland paths |= tbcpm; 6653c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6654c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 66555db8440cSStefan Haberland dasd_schedule_device_bh(dev); 66565db8440cSStefan Haberland } 66575db8440cSStefan Haberland } 66585db8440cSStefan Haberland } 6659b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6660a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6661b179b037SStefan Haberland return 0; 66625db8440cSStefan Haberland } 66635db8440cSStefan Haberland 66645db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 66655db8440cSStefan Haberland __u8 lpum) 66665db8440cSStefan Haberland { 66675db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6668a521b048SStefan Haberland int response; 66695db8440cSStefan Haberland 6670b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6671b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6672b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6673b179b037SStefan Haberland ((u32 *)cuir)[3]); 66745db8440cSStefan Haberland 66755db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 66765db8440cSStefan Haberland /* quiesce */ 6677a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6678b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6679b179b037SStefan Haberland else 6680b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 66815db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 66825db8440cSStefan Haberland /* resume */ 6683a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6684b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 66855db8440cSStefan Haberland } else 66865db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 66875db8440cSStefan Haberland 6688b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6689a521b048SStefan Haberland cuir->message_id, lpum); 6690b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6691b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6692b179b037SStefan Haberland cuir->message_id); 6693b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6694b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 66955db8440cSStefan Haberland } 66965db8440cSStefan Haberland 66979e12e54cSJan Höppner static void dasd_eckd_oos_resume(struct dasd_device *device) 66989e12e54cSJan Höppner { 66999e12e54cSJan Höppner struct dasd_eckd_private *private = device->private; 67009e12e54cSJan Höppner struct alias_pav_group *pavgroup, *tempgroup; 67019e12e54cSJan Höppner struct dasd_device *dev, *n; 67029e12e54cSJan Höppner unsigned long flags; 67039e12e54cSJan Höppner 67049e12e54cSJan Höppner spin_lock_irqsave(&private->lcu->lock, flags); 67059e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 67069e12e54cSJan Höppner alias_list) { 67079e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 67089e12e54cSJan Höppner dasd_generic_space_avail(dev); 67099e12e54cSJan Höppner } 67109e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 67119e12e54cSJan Höppner alias_list) { 67129e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 67139e12e54cSJan Höppner dasd_generic_space_avail(dev); 67149e12e54cSJan Höppner } 67159e12e54cSJan Höppner /* devices in PAV groups */ 67169e12e54cSJan Höppner list_for_each_entry_safe(pavgroup, tempgroup, 67179e12e54cSJan Höppner &private->lcu->grouplist, 67189e12e54cSJan Höppner group) { 67199e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->baselist, 67209e12e54cSJan Höppner alias_list) { 67219e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 67229e12e54cSJan Höppner dasd_generic_space_avail(dev); 67239e12e54cSJan Höppner } 67249e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 67259e12e54cSJan Höppner alias_list) { 67269e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 67279e12e54cSJan Höppner dasd_generic_space_avail(dev); 67289e12e54cSJan Höppner } 67299e12e54cSJan Höppner } 67309e12e54cSJan Höppner spin_unlock_irqrestore(&private->lcu->lock, flags); 67319e12e54cSJan Höppner } 67329e12e54cSJan Höppner 67339e12e54cSJan Höppner static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 67349e12e54cSJan Höppner __u8 lpum) 67359e12e54cSJan Höppner { 67369e12e54cSJan Höppner struct dasd_oos_message *oos = messages; 67379e12e54cSJan Höppner 67389e12e54cSJan Höppner switch (oos->code) { 67399e12e54cSJan Höppner case REPO_WARN: 67409e12e54cSJan Höppner case POOL_WARN: 67419e12e54cSJan Höppner dev_warn(&device->cdev->dev, 67429e12e54cSJan Höppner "Extent pool usage has reached a critical value\n"); 67439e12e54cSJan Höppner dasd_eckd_oos_resume(device); 67449e12e54cSJan Höppner break; 67459e12e54cSJan Höppner case REPO_EXHAUST: 67469e12e54cSJan Höppner case POOL_EXHAUST: 67479e12e54cSJan Höppner dev_warn(&device->cdev->dev, 67489e12e54cSJan Höppner "Extent pool is exhausted\n"); 67499e12e54cSJan Höppner break; 67509e12e54cSJan Höppner case REPO_RELIEVE: 67519e12e54cSJan Höppner case POOL_RELIEVE: 67529e12e54cSJan Höppner dev_info(&device->cdev->dev, 67539e12e54cSJan Höppner "Extent pool physical space constraint has been relieved\n"); 67549e12e54cSJan Höppner break; 67559e12e54cSJan Höppner } 67569e12e54cSJan Höppner 67579e12e54cSJan Höppner /* In any case, update related data */ 67589e12e54cSJan Höppner dasd_eckd_read_ext_pool_info(device); 67599e12e54cSJan Höppner 67609e12e54cSJan Höppner /* to make sure there is no attention left schedule work again */ 67619e12e54cSJan Höppner device->discipline->check_attention(device, lpum); 67629e12e54cSJan Höppner } 67639e12e54cSJan Höppner 67645db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 67655db8440cSStefan Haberland { 67665db8440cSStefan Haberland struct check_attention_work_data *data; 67675db8440cSStefan Haberland struct dasd_rssd_messages *messages; 67685db8440cSStefan Haberland struct dasd_device *device; 67695db8440cSStefan Haberland int rc; 67705db8440cSStefan Haberland 67715db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 67725db8440cSStefan Haberland device = data->device; 67735db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 67745db8440cSStefan Haberland if (!messages) { 67755db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 67765db8440cSStefan Haberland "Could not allocate attention message buffer"); 67775db8440cSStefan Haberland goto out; 67785db8440cSStefan Haberland } 67795db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 67805db8440cSStefan Haberland if (rc) 67815db8440cSStefan Haberland goto out; 67829e12e54cSJan Höppner 67835db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 67845db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 67855db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 67869e12e54cSJan Höppner if (messages->length == ATTENTION_LENGTH_OOS && 67879e12e54cSJan Höppner messages->format == ATTENTION_FORMAT_OOS) 67889e12e54cSJan Höppner dasd_eckd_handle_oos(device, messages, data->lpum); 67899e12e54cSJan Höppner 67905db8440cSStefan Haberland out: 67915db8440cSStefan Haberland dasd_put_device(device); 67925db8440cSStefan Haberland kfree(messages); 67935db8440cSStefan Haberland kfree(data); 67945db8440cSStefan Haberland } 67955db8440cSStefan Haberland 67965db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 67975db8440cSStefan Haberland { 67985db8440cSStefan Haberland struct check_attention_work_data *data; 67995db8440cSStefan Haberland 68005db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 68015db8440cSStefan Haberland if (!data) 68025db8440cSStefan Haberland return -ENOMEM; 68035db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 68045db8440cSStefan Haberland dasd_get_device(device); 68055db8440cSStefan Haberland data->device = device; 68065db8440cSStefan Haberland data->lpum = lpum; 68075db8440cSStefan Haberland schedule_work(&data->worker); 68085db8440cSStefan Haberland return 0; 68095db8440cSStefan Haberland } 68105db8440cSStefan Haberland 6811a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6812a521b048SStefan Haberland { 6813a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6814a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6815a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6816a521b048SStefan Haberland dev_err(&device->cdev->dev, 6817a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6818a521b048SStefan Haberland lpum); 6819a521b048SStefan Haberland return 1; 6820a521b048SStefan Haberland } 6821a521b048SStefan Haberland return 0; 6822a521b048SStefan Haberland } 6823a521b048SStefan Haberland 6824a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6825a521b048SStefan Haberland { 6826a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6827a521b048SStefan Haberland 6828a521b048SStefan Haberland dev_err(&device->cdev->dev, 6829a521b048SStefan Haberland "High Performance FICON disabled\n"); 6830a521b048SStefan Haberland private->fcx_max_data = 0; 6831a521b048SStefan Haberland } 6832a521b048SStefan Haberland 6833a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6834a521b048SStefan Haberland { 6835a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6836a521b048SStefan Haberland 6837a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6838a521b048SStefan Haberland } 6839a521b048SStefan Haberland 6840a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6841a521b048SStefan Haberland struct irb *irb) 6842a521b048SStefan Haberland { 6843a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6844a521b048SStefan Haberland 6845a521b048SStefan Haberland if (!private->fcx_max_data) { 6846a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6847a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6848a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6849a521b048SStefan Haberland return; 6850a521b048SStefan Haberland } 6851a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6852a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6853a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6854a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6855a521b048SStefan Haberland return; 6856a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6857a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6858a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6859a521b048SStefan Haberland } 6860a521b048SStefan Haberland /* 6861a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6862a521b048SStefan Haberland * requeue of existing requests 6863a521b048SStefan Haberland */ 6864a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6865a521b048SStefan Haberland dasd_schedule_requeue(device); 6866a521b048SStefan Haberland } 6867a521b048SStefan Haberland 6868a0610a8aSJan Höppner /* 6869a0610a8aSJan Höppner * Initialize block layer request queue. 6870a0610a8aSJan Höppner */ 6871a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6872a0610a8aSJan Höppner { 6873a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6874c68f4f4eSChristoph Hellwig struct request_queue *q = block->gdp->queue; 6875a0610a8aSJan Höppner struct dasd_device *device = block->base; 6876a0610a8aSJan Höppner int max; 6877a0610a8aSJan Höppner 6878a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6879a0610a8aSJan Höppner /* 6880a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6881a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6882a0610a8aSJan Höppner * only need one ccw per track 6883a0610a8aSJan Höppner * so the max_hw_sectors are 6884a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6885a0610a8aSJan Höppner */ 6886a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6887a0610a8aSJan Höppner } else { 6888a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6889a0610a8aSJan Höppner } 6890a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6891a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6892a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6893a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6894a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6895a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6896a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6897a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6898bc792884SEric Farman blk_queue_dma_alignment(q, PAGE_SIZE - 1); 6899a0610a8aSJan Höppner } 6900a0610a8aSJan Höppner 6901d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 69023bda058bSSebastian Ott .driver = { 6903d41dd122SStefan Haberland .name = "dasd-eckd", 6904d41dd122SStefan Haberland .owner = THIS_MODULE, 69051987c551SJulian Wiedmann .dev_groups = dasd_dev_groups, 69063bda058bSSebastian Ott }, 6907d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6908d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6909d41dd122SStefan Haberland .remove = dasd_generic_remove, 6910d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6911d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6912d41dd122SStefan Haberland .notify = dasd_generic_notify, 6913a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 69144679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6915a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6916420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6917d41dd122SStefan Haberland }; 6918f3eb5384SStefan Weinhuber 69191da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 69201da177e4SLinus Torvalds .owner = THIS_MODULE, 69211da177e4SLinus Torvalds .name = "ECKD", 69221da177e4SLinus Torvalds .ebcname = "ECKD", 69231da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 69248e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 69251da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6926b7294932SJan Höppner .pe_handler = dasd_eckd_pe_handler, 6927d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 69288e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6929daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6930a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 69311da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 69321da177e4SLinus Torvalds .start_IO = dasd_start_IO, 69331da177e4SLinus Torvalds .term_IO = dasd_term_IO, 69348e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 69351da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 69368fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 69371da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 69381da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 69395a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 69408e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 69418e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 69421da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6943fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 69441da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 69451107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6946501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 69472dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6948f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 69495db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 69505a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 69515a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6952a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6953a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6954a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6955a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6956c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6957c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6958c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6959c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 696091dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6961c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6962c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6963c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6964c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6965c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 69669e12e54cSJan Höppner .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 69675e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 69685e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 69693f217cceSStefan Haberland .pprc_status = dasd_eckd_query_pprc_status, 6970a91ff09dSStefan Haberland .pprc_enabled = dasd_eckd_pprc_enabled, 6971413862caSStefan Haberland .copy_pair_swap = dasd_eckd_copy_pair_swap, 697232ff8ce0SStefan Haberland .device_ping = dasd_eckd_device_ping, 69731da177e4SLinus Torvalds }; 69741da177e4SLinus Torvalds 69751da177e4SLinus Torvalds static int __init 69761da177e4SLinus Torvalds dasd_eckd_init(void) 69771da177e4SLinus Torvalds { 6978736e6ea0SSebastian Ott int ret; 6979736e6ea0SSebastian Ott 69801da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6981f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6982f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6983f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6984f932bceaSStefan Weinhuber return -ENOMEM; 69859e12e54cSJan Höppner dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 69869e12e54cSJan Höppner GFP_KERNEL | GFP_DMA); 6987460e9bedSQiheng Lin if (!dasd_vol_info_req) { 6988460e9bedSQiheng Lin kfree(dasd_reserve_req); 69899e12e54cSJan Höppner return -ENOMEM; 6990460e9bedSQiheng Lin } 6991b7294932SJan Höppner pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), 6992a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6993b7294932SJan Höppner if (!pe_handler_worker) { 6994a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 69959e12e54cSJan Höppner kfree(dasd_vol_info_req); 6996a4d26c6aSStefan Weinhuber return -ENOMEM; 6997a4d26c6aSStefan Weinhuber } 6998558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6999558b9ef0SStefan Weinhuber if (!rawpadpage) { 7000b7294932SJan Höppner kfree(pe_handler_worker); 7001558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 70029e12e54cSJan Höppner kfree(dasd_vol_info_req); 7003558b9ef0SStefan Weinhuber return -ENOMEM; 7004558b9ef0SStefan Weinhuber } 7005736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 7006736e6ea0SSebastian Ott if (!ret) 7007736e6ea0SSebastian Ott wait_for_device_probe(); 7008a4d26c6aSStefan Weinhuber else { 7009b7294932SJan Höppner kfree(pe_handler_worker); 7010f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 70119e12e54cSJan Höppner kfree(dasd_vol_info_req); 7012558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 7013a4d26c6aSStefan Weinhuber } 7014736e6ea0SSebastian Ott return ret; 70151da177e4SLinus Torvalds } 70161da177e4SLinus Torvalds 70171da177e4SLinus Torvalds static void __exit 70181da177e4SLinus Torvalds dasd_eckd_cleanup(void) 70191da177e4SLinus Torvalds { 70201da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 7021b7294932SJan Höppner kfree(pe_handler_worker); 7022f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 7023558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 70241da177e4SLinus Torvalds } 70251da177e4SLinus Torvalds 70261da177e4SLinus Torvalds module_init(dasd_eckd_init); 70271da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 7028