16a55d2cdSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 51da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 61da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 71da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 8d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 9ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 13ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 14fc19f381SStefan Haberland 151da177e4SLinus Torvalds #include <linux/stddef.h> 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 191da177e4SLinus Torvalds #include <linux/bio.h> 201da177e4SLinus Torvalds #include <linux/module.h> 21048cd4e5SHeiko Carstens #include <linux/compat.h> 221da177e4SLinus Torvalds #include <linux/init.h> 235a3b7b11SStefan Haberland #include <linux/seq_file.h> 241da177e4SLinus Torvalds 25382b7366SSebastian Ott #include <asm/css_chars.h> 261da177e4SLinus Torvalds #include <asm/debug.h> 271da177e4SLinus Torvalds #include <asm/idals.h> 281da177e4SLinus Torvalds #include <asm/ebcdic.h> 291da177e4SLinus Torvalds #include <asm/io.h> 307c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 3140545573SHorst Hummel #include <asm/cio.h> 321da177e4SLinus Torvalds #include <asm/ccwdev.h> 33f3eb5384SStefan Weinhuber #include <asm/itcw.h> 345db8440cSStefan Haberland #include <asm/schid.h> 355db8440cSStefan Haberland #include <asm/chpid.h> 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include "dasd_int.h" 381da177e4SLinus Torvalds #include "dasd_eckd.h" 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #ifdef PRINTK_HEADER 411da177e4SLinus Torvalds #undef PRINTK_HEADER 421da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 431da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 441da177e4SLinus Torvalds 45e4dbb0f2SStefan Haberland /* 46e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 47e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 48e4dbb0f2SStefan Haberland */ 49e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 50e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 51e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 52e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 53e4dbb0f2SStefan Haberland 541da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 591da177e4SLinus Torvalds * dasd_eckd_probe */ 601da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 61d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 62d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 635da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 64d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 65d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 66d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 67d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 68d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 69d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 70d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 711da177e4SLinus Torvalds { /* end of list */ }, 721da177e4SLinus Torvalds }; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 771da177e4SLinus Torvalds 78558b9ef0SStefan Weinhuber static void *rawpadpage; 79558b9ef0SStefan Weinhuber 80eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 81eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 82eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 83eb6e199bSStefan Weinhuber 84f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 85f932bceaSStefan Weinhuber static struct { 86f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 87f932bceaSStefan Weinhuber struct ccw1 ccw; 88f932bceaSStefan Weinhuber char data[32]; 89f932bceaSStefan Weinhuber } *dasd_reserve_req; 90f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 91f932bceaSStefan Weinhuber 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); 1308fd57520SJan Höppner 1311da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1321da177e4SLinus Torvalds * the other detection code is gone */ 1331da177e4SLinus Torvalds static int 1341da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds int ret; 1371da177e4SLinus Torvalds 13840545573SHorst Hummel /* set ECKD specific ccw-device options */ 139454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 140454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 14140545573SHorst Hummel if (ret) { 142b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 143b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 144b8ed5dd5SStefan Haberland "ccw-device options"); 1451da177e4SLinus Torvalds return ret; 14640545573SHorst Hummel } 147e03c5941SJan Höppner ret = dasd_generic_probe(cdev); 14840545573SHorst Hummel return ret; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds static int 1521da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1531da177e4SLinus Torvalds { 1541da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1551da177e4SLinus Torvalds } 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1581da177e4SLinus Torvalds #define LABEL_SIZE 140 1591da177e4SLinus Torvalds 1603bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 161ce6915f5SJan Höppner static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 1623bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1633bc9fef9SStefan Haberland 1641da177e4SLinus Torvalds static inline unsigned int 1651da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1661da177e4SLinus Torvalds { 1671da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1704d284cacSHeiko Carstens static unsigned int 1711da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1721da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds int dn, kn; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds switch (rdc->dev_type) { 1771da177e4SLinus Torvalds case 0x3380: 1781da177e4SLinus Torvalds if (kl) 1791da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1801da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1811da177e4SLinus Torvalds else 1821da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1831da177e4SLinus Torvalds case 0x3390: 1841da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1851da177e4SLinus Torvalds if (kl) { 1861da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1871da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1881da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1891da177e4SLinus Torvalds } else 1901da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1911da177e4SLinus Torvalds case 0x9345: 1921da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1931da177e4SLinus Torvalds if (kl) { 1941da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1951da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1961da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1971da177e4SLinus Torvalds } else 1981da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds return 0; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 203b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 204b44b0ab3SStefan Weinhuber { 205b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 206b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 207b44b0ab3SStefan Weinhuber geo->head <<= 4; 208b44b0ab3SStefan Weinhuber geo->head |= head; 209b44b0ab3SStefan Weinhuber } 210b44b0ab3SStefan Weinhuber 2115e6bdd37SStefan Haberland /* 2125e6bdd37SStefan Haberland * calculate failing track from sense data depending if 2135e6bdd37SStefan Haberland * it is an EAV device or not 2145e6bdd37SStefan Haberland */ 2155e6bdd37SStefan Haberland static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, 2165e6bdd37SStefan Haberland sector_t *track) 2175e6bdd37SStefan Haberland { 2185e6bdd37SStefan Haberland struct dasd_eckd_private *private = device->private; 2195e6bdd37SStefan Haberland u8 *sense = NULL; 2205e6bdd37SStefan Haberland u32 cyl; 2215e6bdd37SStefan Haberland u8 head; 2225e6bdd37SStefan Haberland 2235e6bdd37SStefan Haberland sense = dasd_get_sense(irb); 2245e6bdd37SStefan Haberland if (!sense) { 2255e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2265e6bdd37SStefan Haberland "ESE error no sense data\n"); 2275e6bdd37SStefan Haberland return -EINVAL; 2285e6bdd37SStefan Haberland } 2295e6bdd37SStefan Haberland if (!(sense[27] & DASD_SENSE_BIT_2)) { 2305e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2315e6bdd37SStefan Haberland "ESE error no valid track data\n"); 2325e6bdd37SStefan Haberland return -EINVAL; 2335e6bdd37SStefan Haberland } 2345e6bdd37SStefan Haberland 2355e6bdd37SStefan Haberland if (sense[27] & DASD_SENSE_BIT_3) { 2365e6bdd37SStefan Haberland /* enhanced addressing */ 2375e6bdd37SStefan Haberland cyl = sense[30] << 20; 2385e6bdd37SStefan Haberland cyl |= (sense[31] & 0xF0) << 12; 2395e6bdd37SStefan Haberland cyl |= sense[28] << 8; 2405e6bdd37SStefan Haberland cyl |= sense[29]; 2415e6bdd37SStefan Haberland } else { 2425e6bdd37SStefan Haberland cyl = sense[29] << 8; 2435e6bdd37SStefan Haberland cyl |= sense[30]; 2445e6bdd37SStefan Haberland } 2455e6bdd37SStefan Haberland head = sense[31] & 0x0F; 2465e6bdd37SStefan Haberland *track = cyl * private->rdc_data.trk_per_cyl + head; 2475e6bdd37SStefan Haberland return 0; 2485e6bdd37SStefan Haberland } 2495e6bdd37SStefan Haberland 2505628683cSStefan Haberland static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 2511da177e4SLinus Torvalds struct dasd_device *device) 2521da177e4SLinus Torvalds { 253543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 254d54853efSMartin Schwidefsky int rc; 2551da177e4SLinus Torvalds 2565628683cSStefan Haberland rc = get_phys_clock(&data->ep_sys_time); 2575628683cSStefan Haberland /* 2585628683cSStefan Haberland * Ignore return code if XRC is not supported or 2595628683cSStefan Haberland * sync clock is switched off 2605628683cSStefan Haberland */ 2615628683cSStefan Haberland if ((rc && !private->rdc_data.facilities.XRC_supported) || 2625628683cSStefan Haberland rc == -EOPNOTSUPP || rc == -EACCES) 263d54853efSMartin Schwidefsky return 0; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2661da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2671da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2681da177e4SLinus Torvalds 26945f186beSJan Höppner if (ccw) { 27045f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 27145f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 27245f186beSJan Höppner } 27345f186beSJan Höppner 274d54853efSMartin Schwidefsky return rc; 2751da177e4SLinus Torvalds } 2761da177e4SLinus Torvalds 2774d284cacSHeiko Carstens static int 278b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 27945f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 28045f186beSJan Höppner int blksize) 2811da177e4SLinus Torvalds { 282543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 283b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 28445f186beSJan Höppner u32 begcyl, endcyl; 285d54853efSMartin Schwidefsky int rc = 0; 2861da177e4SLinus Torvalds 28745f186beSJan Höppner if (ccw) { 2881da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2891da177e4SLinus Torvalds ccw->flags = 0; 2901da177e4SLinus Torvalds ccw->count = 16; 2911da177e4SLinus Torvalds ccw->cda = (__u32)__pa(data); 29245f186beSJan Höppner } 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2951da177e4SLinus Torvalds switch (cmd) { 2961da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2971da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2981da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2991da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 3001da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 3011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 3021da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 3031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 3041da177e4SLinus Torvalds data->mask.perm = 0x1; 3051da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 3061da177e4SLinus Torvalds break; 3078fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 3088fd57520SJan Höppner data->mask.perm = 0x1; 3098fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 3108fd57520SJan Höppner break; 31145f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 31245f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 31345f186beSJan Höppner data->mask.perm = 0x1; 31445f186beSJan Höppner data->attributes.operation = private->attrib.operation; 31545f186beSJan Höppner data->blk_size = 0; 31645f186beSJan Höppner break; 3171da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 3181da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 3191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 3201da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 3211da177e4SLinus Torvalds data->mask.perm = 0x02; 3221da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 3235628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3241da177e4SLinus Torvalds break; 3251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 3261da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 3271da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3285628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3291da177e4SLinus Torvalds break; 3301da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 3311da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3321da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3331da177e4SLinus Torvalds data->mask.perm = 0x3; 3341da177e4SLinus Torvalds data->mask.auth = 0x1; 3351da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3365628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3371da177e4SLinus Torvalds break; 33845f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 33945f186beSJan Höppner data->mask.perm = 0x03; 34045f186beSJan Höppner data->attributes.operation = private->attrib.operation; 34145f186beSJan Höppner data->blk_size = 0; 34245f186beSJan Höppner break; 34345f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 34445f186beSJan Höppner data->mask.perm = 0x02; 34545f186beSJan Höppner data->attributes.operation = private->attrib.operation; 34645f186beSJan Höppner data->blk_size = blksize; 3475628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 34845f186beSJan Höppner break; 3491da177e4SLinus Torvalds default: 350fc19f381SStefan Haberland dev_err(&device->cdev->dev, 351fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 3521da177e4SLinus Torvalds break; 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3581da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3591da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3601da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3611da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3621da177e4SLinus Torvalds 363b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 364b44b0ab3SStefan Weinhuber begcyl = trk / heads; 365b44b0ab3SStefan Weinhuber beghead = trk % heads; 366b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 367b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3701da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3711da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3721da177e4SLinus Torvalds 373b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 374b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3751da177e4SLinus Torvalds else 376b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds 379b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 380b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 381d54853efSMartin Schwidefsky return rc; 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds 3848e09f215SStefan Weinhuber 38545f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 38645f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 38745f186beSJan Höppner int count, int cmd, struct dasd_device *device, 38845f186beSJan Höppner unsigned int reclen, unsigned int tlf) 389f3eb5384SStefan Weinhuber { 390543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 391f3eb5384SStefan Weinhuber int sector; 392f3eb5384SStefan Weinhuber int dn, d; 393f3eb5384SStefan Weinhuber 39445f186beSJan Höppner if (ccw) { 39545f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 39645f186beSJan Höppner ccw->flags = 0; 39745f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 39845f186beSJan Höppner ccw->count = 22; 39945f186beSJan Höppner else 40045f186beSJan Höppner ccw->count = 20; 40145f186beSJan Höppner ccw->cda = (__u32)__pa(data); 40245f186beSJan Höppner } 40345f186beSJan Höppner 404f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 405f3eb5384SStefan Weinhuber sector = 0; 406f3eb5384SStefan Weinhuber if (rec_on_trk) { 407f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 408f3eb5384SStefan Weinhuber case 0x3390: 409f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 410f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 411f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 412f3eb5384SStefan Weinhuber break; 413f3eb5384SStefan Weinhuber case 0x3380: 414f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 415f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 416f3eb5384SStefan Weinhuber break; 417f3eb5384SStefan Weinhuber } 418f3eb5384SStefan Weinhuber } 419f3eb5384SStefan Weinhuber data->sector = sector; 420f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 421f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 422f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 423f3eb5384SStefan Weinhuber */ 424f3eb5384SStefan Weinhuber data->count = count; 425f3eb5384SStefan Weinhuber switch (cmd) { 426f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 427f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 428f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 429f3eb5384SStefan Weinhuber break; 430f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 431f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 432f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 433f3eb5384SStefan Weinhuber break; 434f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 435f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 436f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 437f3eb5384SStefan Weinhuber data->count++; 438f3eb5384SStefan Weinhuber break; 439f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 440f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 441f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 442f3eb5384SStefan Weinhuber data->count++; 443f3eb5384SStefan Weinhuber break; 444f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 445f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 446f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 447f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 448f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 449f3eb5384SStefan Weinhuber data->length = reclen; 450f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 451f3eb5384SStefan Weinhuber break; 452f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 453f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 454f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 455f3eb5384SStefan Weinhuber data->length = reclen; 456f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 457f3eb5384SStefan Weinhuber break; 458e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 459e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 460e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 461e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 462e4dbb0f2SStefan Haberland data->length = 0; 463e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 464e4dbb0f2SStefan Haberland if (data->count > 8) { 465e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 466e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 467e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 468e4dbb0f2SStefan Haberland } else { 469e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 470e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 471e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 472e4dbb0f2SStefan Haberland } 473e4dbb0f2SStefan Haberland data->sector = 0xFF; 474e4dbb0f2SStefan Haberland break; 475f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 476f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 477f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 478f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 479f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 480f3eb5384SStefan Weinhuber break; 481f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 482f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 483f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 484f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 485f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 486f3eb5384SStefan Weinhuber data->length = reclen; 487f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 488f3eb5384SStefan Weinhuber break; 489f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 490f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 491f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 492f3eb5384SStefan Weinhuber data->length = reclen; 493f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 494f3eb5384SStefan Weinhuber break; 495f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 496f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 497f3eb5384SStefan Weinhuber break; 498e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 499e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 500e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 501e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 502e4dbb0f2SStefan Haberland data->sector = 0xFF; 503e4dbb0f2SStefan Haberland break; 504f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 505f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 506f3eb5384SStefan Weinhuber data->length = tlf; 507f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 508f3eb5384SStefan Weinhuber break; 509f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 510f3eb5384SStefan Weinhuber data->length = reclen; 511f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 512f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 513f3eb5384SStefan Weinhuber break; 514f3eb5384SStefan Weinhuber default: 515f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 516f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 517f3eb5384SStefan Weinhuber BUG(); 518f3eb5384SStefan Weinhuber } 519f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 520f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 521f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 522f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 523f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 524f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 525f3eb5384SStefan Weinhuber } 526f3eb5384SStefan Weinhuber 527f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 528b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 529f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 53045f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 531f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 5328e09f215SStefan Weinhuber { 5338e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 534f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 53545f186beSJan Höppner struct DE_eckd_data *dedata; 5368e09f215SStefan Weinhuber int rc = 0; 5378e09f215SStefan Weinhuber 538543691a4SSebastian Ott basepriv = basedev->private; 539543691a4SSebastian Ott startpriv = startdev->private; 540f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 541f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 5428e09f215SStefan Weinhuber 5438e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5448e09f215SStefan Weinhuber ccw->flags = 0; 545e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 546e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 547e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 548e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 549e4dbb0f2SStefan Haberland } else { 5508e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5518e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5528e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 553e4dbb0f2SStefan Haberland } 554e4dbb0f2SStefan Haberland 5558e09f215SStefan Weinhuber /* prefix data */ 556f3eb5384SStefan Weinhuber if (format > 1) { 557f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 558f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 559f3eb5384SStefan Weinhuber BUG(); 560f3eb5384SStefan Weinhuber return -EINVAL; 561f3eb5384SStefan Weinhuber } 562f3eb5384SStefan Weinhuber pfxdata->format = format; 563542e30ceSStefan Haberland pfxdata->base_address = basepriv->conf.ned->unit_addr; 564542e30ceSStefan Haberland pfxdata->base_lss = basepriv->conf.ned->ID; 565f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5668e09f215SStefan Weinhuber 5678e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 568da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 5698e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 570da340f92SStefan Haberland 571da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 572da340f92SStefan Haberland pfxdata->validity.verify_base = 1; 5738e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5748e09f215SStefan Weinhuber } 5758e09f215SStefan Weinhuber 57645f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5778e09f215SStefan Weinhuber 57845f186beSJan Höppner /* 57945f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 58045f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 58145f186beSJan Höppner * reflected in the prefix data as well. 58245f186beSJan Höppner */ 58345f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 58445f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 585f3eb5384SStefan Weinhuber 586f3eb5384SStefan Weinhuber if (format == 1) { 58745f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 588f3eb5384SStefan Weinhuber basedev, blksize, tlf); 589f3eb5384SStefan Weinhuber } 590f3eb5384SStefan Weinhuber 5918e09f215SStefan Weinhuber return rc; 5928e09f215SStefan Weinhuber } 5938e09f215SStefan Weinhuber 594f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 595f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 596f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 597f3eb5384SStefan Weinhuber { 598f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 599f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 600f3eb5384SStefan Weinhuber } 601f3eb5384SStefan Weinhuber 6024d284cacSHeiko Carstens static void 603b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 604b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6051da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6061da177e4SLinus Torvalds { 607543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 6081da177e4SLinus Torvalds int sector; 6091da177e4SLinus Torvalds int dn, d; 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6121da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6131da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6161da177e4SLinus Torvalds ccw->flags = 0; 6171da177e4SLinus Torvalds ccw->count = 16; 6181da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6211da177e4SLinus Torvalds sector = 0; 6221da177e4SLinus Torvalds if (rec_on_trk) { 6231da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6241da177e4SLinus Torvalds case 0x3390: 6251da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6261da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6271da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6281da177e4SLinus Torvalds break; 6291da177e4SLinus Torvalds case 0x3380: 6301da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6311da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6321da177e4SLinus Torvalds break; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds } 6351da177e4SLinus Torvalds data->sector = sector; 6361da177e4SLinus Torvalds data->count = no_rec; 6371da177e4SLinus Torvalds switch (cmd) { 6381da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6391da177e4SLinus Torvalds data->operation.orientation = 0x3; 6401da177e4SLinus Torvalds data->operation.operation = 0x03; 6411da177e4SLinus Torvalds break; 6421da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6431da177e4SLinus Torvalds data->operation.orientation = 0x3; 6441da177e4SLinus Torvalds data->operation.operation = 0x16; 6451da177e4SLinus Torvalds break; 6461da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6471da177e4SLinus Torvalds data->operation.orientation = 0x1; 6481da177e4SLinus Torvalds data->operation.operation = 0x03; 6491da177e4SLinus Torvalds data->count++; 6501da177e4SLinus Torvalds break; 6511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6521da177e4SLinus Torvalds data->operation.orientation = 0x3; 6531da177e4SLinus Torvalds data->operation.operation = 0x16; 6541da177e4SLinus Torvalds data->count++; 6551da177e4SLinus Torvalds break; 6561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6601da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6611da177e4SLinus Torvalds data->length = reclen; 6621da177e4SLinus Torvalds data->operation.operation = 0x01; 6631da177e4SLinus Torvalds break; 6641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6661da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6671da177e4SLinus Torvalds data->length = reclen; 6681da177e4SLinus Torvalds data->operation.operation = 0x03; 6691da177e4SLinus Torvalds break; 6701da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6711da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6721da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6731da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6741da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6751da177e4SLinus Torvalds data->length = reclen; 6761da177e4SLinus Torvalds data->operation.operation = 0x06; 6771da177e4SLinus Torvalds break; 6781da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6791da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6801da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6811da177e4SLinus Torvalds data->length = reclen; 6821da177e4SLinus Torvalds data->operation.operation = 0x16; 6831da177e4SLinus Torvalds break; 6841da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6851da177e4SLinus Torvalds data->operation.operation = 0x06; 6861da177e4SLinus Torvalds break; 6871da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6881da177e4SLinus Torvalds data->length = reclen; 6891da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6901da177e4SLinus Torvalds data->operation.operation = 0x0b; 6911da177e4SLinus Torvalds break; 6921da177e4SLinus Torvalds default: 693fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 694fc19f381SStefan Haberland "opcode 0x%x", cmd); 6951da177e4SLinus Torvalds } 696b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 697b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 698b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 699b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 700b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7011da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds /* 7051da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7061da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7071da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7081da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7091da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7101da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7111da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7121da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7131da177e4SLinus Torvalds */ 7141da177e4SLinus Torvalds static inline int 7151da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds if (recid < 3) 7181da177e4SLinus Torvalds return 1; 7191da177e4SLinus Torvalds if (recid < blk_per_trk) 7201da177e4SLinus Torvalds return 0; 7211da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7221da177e4SLinus Torvalds return 1; 7231da177e4SLinus Torvalds return 0; 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds /* 7271da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7281da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7291da177e4SLinus Torvalds * for the recid. 7301da177e4SLinus Torvalds */ 7311da177e4SLinus Torvalds static inline int 7321da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7331da177e4SLinus Torvalds { 7341da177e4SLinus Torvalds if (recid < 3) 7351da177e4SLinus Torvalds return sizes_trk0[recid]; 7361da177e4SLinus Torvalds return LABEL_SIZE; 7371da177e4SLinus Torvalds } 738b206181dSStefan Haberland /* create unique id from private structure. */ 739542e30ceSStefan Haberland static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid) 7403d052595SHorst Hummel { 7414abb08c2SStefan Weinhuber int count; 7423d052595SHorst Hummel 7433d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 744542e30ceSStefan Haberland memcpy(uid->vendor, conf->ned->HDA_manufacturer, 7453d052595SHorst Hummel sizeof(uid->vendor) - 1); 7463d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 747542e30ceSStefan Haberland memcpy(uid->serial, &conf->ned->serial, 7483d052595SHorst Hummel sizeof(uid->serial) - 1); 7493d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 750542e30ceSStefan Haberland uid->ssid = conf->gneq->subsystemID; 751542e30ceSStefan Haberland uid->real_unit_addr = conf->ned->unit_addr; 752542e30ceSStefan Haberland if (conf->sneq) { 753542e30ceSStefan Haberland uid->type = conf->sneq->sua_flags; 7548e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 755542e30ceSStefan Haberland uid->base_unit_addr = conf->sneq->base_unit_addr; 7568e09f215SStefan Weinhuber } else { 7578e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7588e09f215SStefan Weinhuber } 759542e30ceSStefan Haberland if (conf->vdsneq) { 7604abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7614abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 762542e30ceSStefan Haberland conf->vdsneq->uit[count]); 7634abb08c2SStefan Weinhuber } 7644abb08c2SStefan Weinhuber } 765b206181dSStefan Haberland } 766b206181dSStefan Haberland 767b206181dSStefan Haberland /* 768b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 769b206181dSStefan Haberland */ 770b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 771b206181dSStefan Haberland { 772543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 773b206181dSStefan Haberland unsigned long flags; 774b206181dSStefan Haberland 775b206181dSStefan Haberland if (!private) 776b206181dSStefan Haberland return -ENODEV; 777542e30ceSStefan Haberland if (!private->conf.ned || !private->conf.gneq) 778b206181dSStefan Haberland return -ENODEV; 779b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 780542e30ceSStefan Haberland create_uid(&private->conf, &private->uid); 7812dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7823d052595SHorst Hummel return 0; 7833d052595SHorst Hummel } 7843d052595SHorst Hummel 7852dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7862dedf0d9SStefan Haberland { 787543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7882dedf0d9SStefan Haberland unsigned long flags; 7892dedf0d9SStefan Haberland 790543691a4SSebastian Ott if (private) { 7912dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7922dedf0d9SStefan Haberland *uid = private->uid; 7932dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7942dedf0d9SStefan Haberland return 0; 7952dedf0d9SStefan Haberland } 7962dedf0d9SStefan Haberland return -EINVAL; 7972dedf0d9SStefan Haberland } 7982dedf0d9SStefan Haberland 799b206181dSStefan Haberland /* 800b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 801b206181dSStefan Haberland * return 0 for match 802b206181dSStefan Haberland */ 803b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 804542e30ceSStefan Haberland struct dasd_conf *path_conf) 805b206181dSStefan Haberland { 806b206181dSStefan Haberland struct dasd_uid device_uid; 807542e30ceSStefan Haberland struct dasd_uid path_uid; 808b206181dSStefan Haberland 809542e30ceSStefan Haberland create_uid(path_conf, &path_uid); 810b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 811b206181dSStefan Haberland 812542e30ceSStefan Haberland return memcmp(&device_uid, &path_uid, sizeof(struct dasd_uid)); 813b206181dSStefan Haberland } 814b206181dSStefan Haberland 815a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 816a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 817a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 818a4d26c6aSStefan Weinhuber __u8 lpm) 81917283b56SCornelia Huck { 82017283b56SCornelia Huck struct ccw1 *ccw; 821a4d26c6aSStefan Weinhuber /* 822a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 823a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 824a4d26c6aSStefan Weinhuber */ 825a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 826a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 827a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 828a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 82917283b56SCornelia Huck 83017283b56SCornelia Huck ccw = cqr->cpaddr; 831a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 832a4d26c6aSStefan Weinhuber ccw->flags = 0; 83317283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 834a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 835a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 83617283b56SCornelia Huck 8378e09f215SStefan Weinhuber cqr->startdev = device; 8388e09f215SStefan Weinhuber cqr->memdev = device; 8398e09f215SStefan Weinhuber cqr->block = NULL; 84017283b56SCornelia Huck cqr->expires = 10*HZ; 84117283b56SCornelia Huck cqr->lpm = lpm; 842eb6e199bSStefan Weinhuber cqr->retries = 256; 8431aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 84417283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 845a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 846a4d26c6aSStefan Weinhuber } 847a4d26c6aSStefan Weinhuber 8485915a873SStefan Haberland /* 8495915a873SStefan Haberland * Wakeup helper for read_conf 8505915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8515915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8525915a873SStefan Haberland * to show support for virtual device SNEQ 8535915a873SStefan Haberland */ 8545915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8555915a873SStefan Haberland { 8565915a873SStefan Haberland struct ccw1 *ccw; 8575915a873SStefan Haberland __u8 *rcd_buffer; 8585915a873SStefan Haberland 8595915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8605915a873SStefan Haberland ccw = cqr->cpaddr; 8615915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8625915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8635915a873SStefan Haberland 8645915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8655915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8665915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8675915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8685915a873SStefan Haberland } 8695915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8705915a873SStefan Haberland } 8715915a873SStefan Haberland 872a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 873a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 874a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 875a4d26c6aSStefan Weinhuber __u8 lpm) 876a4d26c6aSStefan Weinhuber { 877a4d26c6aSStefan Weinhuber struct ciw *ciw; 878a4d26c6aSStefan Weinhuber int rc; 879a4d26c6aSStefan Weinhuber /* 880a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 881a4d26c6aSStefan Weinhuber * some devices do not support RCD 882a4d26c6aSStefan Weinhuber */ 883a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 884a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 885a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 886a4d26c6aSStefan Weinhuber 887a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 888a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8895a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 890a4d26c6aSStefan Weinhuber cqr->retries = 5; 8915915a873SStefan Haberland cqr->callback = read_conf_cb; 892a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 893a4d26c6aSStefan Weinhuber return rc; 89417283b56SCornelia Huck } 89517283b56SCornelia Huck 89617283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 89717283b56SCornelia Huck void **rcd_buffer, 89817283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 89917283b56SCornelia Huck { 90017283b56SCornelia Huck struct ciw *ciw; 90117283b56SCornelia Huck char *rcd_buf = NULL; 90217283b56SCornelia Huck int ret; 90317283b56SCornelia Huck struct dasd_ccw_req *cqr; 90417283b56SCornelia Huck 90517283b56SCornelia Huck /* 906a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 907a4d26c6aSStefan Weinhuber * some devices do not support RCD 90817283b56SCornelia Huck */ 90917283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 910a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 91117283b56SCornelia Huck ret = -EOPNOTSUPP; 91217283b56SCornelia Huck goto out_error; 91317283b56SCornelia Huck } 914a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 91517283b56SCornelia Huck if (!rcd_buf) { 91617283b56SCornelia Huck ret = -ENOMEM; 91717283b56SCornelia Huck goto out_error; 91817283b56SCornelia Huck } 919a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 920a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 921c5205f2fSSebastian Ott device, NULL); 92217283b56SCornelia Huck if (IS_ERR(cqr)) { 923a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 924a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 925a4d26c6aSStefan Weinhuber ret = -ENOMEM; 92617283b56SCornelia Huck goto out_error; 92717283b56SCornelia Huck } 928a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9295915a873SStefan Haberland cqr->callback = read_conf_cb; 93017283b56SCornelia Huck ret = dasd_sleep_on(cqr); 93117283b56SCornelia Huck /* 93217283b56SCornelia Huck * on success we update the user input parms 93317283b56SCornelia Huck */ 9348e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 93517283b56SCornelia Huck if (ret) 93617283b56SCornelia Huck goto out_error; 93717283b56SCornelia Huck 938a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 93917283b56SCornelia Huck *rcd_buffer = rcd_buf; 94017283b56SCornelia Huck return 0; 94117283b56SCornelia Huck out_error: 94217283b56SCornelia Huck kfree(rcd_buf); 94317283b56SCornelia Huck *rcd_buffer = NULL; 94417283b56SCornelia Huck *rcd_buffer_size = 0; 94517283b56SCornelia Huck return ret; 94617283b56SCornelia Huck } 94717283b56SCornelia Huck 948542e30ceSStefan Haberland static int dasd_eckd_identify_conf_parts(struct dasd_conf *conf) 9494abb08c2SStefan Weinhuber { 9504abb08c2SStefan Weinhuber 9514abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9524abb08c2SStefan Weinhuber int i, count; 9534abb08c2SStefan Weinhuber 954542e30ceSStefan Haberland conf->ned = NULL; 955542e30ceSStefan Haberland conf->sneq = NULL; 956542e30ceSStefan Haberland conf->vdsneq = NULL; 957542e30ceSStefan Haberland conf->gneq = NULL; 958542e30ceSStefan Haberland count = conf->len / sizeof(struct dasd_sneq); 959542e30ceSStefan Haberland sneq = (struct dasd_sneq *)conf->data; 9604abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9614abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 962542e30ceSStefan Haberland conf->sneq = sneq; 9634abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 964542e30ceSStefan Haberland conf->vdsneq = (struct vd_sneq *)sneq; 9654abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 966542e30ceSStefan Haberland conf->gneq = (struct dasd_gneq *)sneq; 9674abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 968542e30ceSStefan Haberland conf->ned = (struct dasd_ned *)sneq; 9694abb08c2SStefan Weinhuber sneq++; 9704abb08c2SStefan Weinhuber } 971542e30ceSStefan Haberland if (!conf->ned || !conf->gneq) { 972542e30ceSStefan Haberland conf->ned = NULL; 973542e30ceSStefan Haberland conf->sneq = NULL; 974542e30ceSStefan Haberland conf->vdsneq = NULL; 975542e30ceSStefan Haberland conf->gneq = NULL; 9764abb08c2SStefan Weinhuber return -EINVAL; 9774abb08c2SStefan Weinhuber } 9784abb08c2SStefan Weinhuber return 0; 9794abb08c2SStefan Weinhuber 9804abb08c2SStefan Weinhuber }; 9814abb08c2SStefan Weinhuber 9824abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9834abb08c2SStefan Weinhuber { 9844abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9854abb08c2SStefan Weinhuber int i, count, found; 9864abb08c2SStefan Weinhuber 9874abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9884abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9894abb08c2SStefan Weinhuber found = 0; 9904abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9914abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9924abb08c2SStefan Weinhuber found = 1; 9934abb08c2SStefan Weinhuber break; 9944abb08c2SStefan Weinhuber } 9954abb08c2SStefan Weinhuber gneq++; 9964abb08c2SStefan Weinhuber } 9974abb08c2SStefan Weinhuber if (found) 9984abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9994abb08c2SStefan Weinhuber else 10004abb08c2SStefan Weinhuber return 0; 10014abb08c2SStefan Weinhuber } 10024abb08c2SStefan Weinhuber 1003d2a52758SJan Höppner static void dasd_eckd_store_conf_data(struct dasd_device *device, 1004d2a52758SJan Höppner struct dasd_conf_data *conf_data, int chp) 1005d2a52758SJan Höppner { 1006952835edSStefan Haberland struct dasd_eckd_private *private = device->private; 1007d2a52758SJan Höppner struct channel_path_desc_fmt0 *chp_desc; 1008d2a52758SJan Höppner struct subchannel_id sch_id; 1009952835edSStefan Haberland void *cdp; 1010d2a52758SJan Höppner 101146018121SJan Höppner /* 101246018121SJan Höppner * path handling and read_conf allocate data 101346018121SJan Höppner * free it before replacing the pointer 1014952835edSStefan Haberland * also replace the old private->conf_data pointer 1015952835edSStefan Haberland * with the new one if this points to the same data 101646018121SJan Höppner */ 1017952835edSStefan Haberland cdp = device->path[chp].conf_data; 1018542e30ceSStefan Haberland if (private->conf.data == cdp) { 1019542e30ceSStefan Haberland private->conf.data = (void *)conf_data; 1020542e30ceSStefan Haberland dasd_eckd_identify_conf_parts(&private->conf); 1021952835edSStefan Haberland } 1022952835edSStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 1023d2a52758SJan Höppner device->path[chp].conf_data = conf_data; 1024d2a52758SJan Höppner device->path[chp].cssid = sch_id.cssid; 1025d2a52758SJan Höppner device->path[chp].ssid = sch_id.ssid; 1026d2a52758SJan Höppner chp_desc = ccw_device_get_chp_desc(device->cdev, chp); 1027d2a52758SJan Höppner if (chp_desc) 1028d2a52758SJan Höppner device->path[chp].chpid = chp_desc->chpid; 1029d2a52758SJan Höppner kfree(chp_desc); 1030952835edSStefan Haberland kfree(cdp); 1031d2a52758SJan Höppner } 1032d2a52758SJan Höppner 1033c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1034c7c0c9deSStefan Haberland { 1035543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1036c7c0c9deSStefan Haberland int i; 1037c7c0c9deSStefan Haberland 1038542e30ceSStefan Haberland private->conf.data = NULL; 1039542e30ceSStefan Haberland private->conf.len = 0; 1040c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1041c9346151SStefan Haberland kfree(device->path[i].conf_data); 1042c9346151SStefan Haberland device->path[i].conf_data = NULL; 1043a521b048SStefan Haberland device->path[i].cssid = 0; 1044a521b048SStefan Haberland device->path[i].ssid = 0; 1045a521b048SStefan Haberland device->path[i].chpid = 0; 10469e34c8baSJan Höppner dasd_path_notoper(device, i); 1047c7c0c9deSStefan Haberland } 1048c7c0c9deSStefan Haberland } 1049c7c0c9deSStefan Haberland 105019508b20SJan Höppner static void dasd_eckd_read_fc_security(struct dasd_device *device) 105119508b20SJan Höppner { 105219508b20SJan Höppner struct dasd_eckd_private *private = device->private; 105319508b20SJan Höppner u8 esm_valid; 105419508b20SJan Höppner u8 esm[8]; 105519508b20SJan Höppner int chp; 105619508b20SJan Höppner int rc; 105719508b20SJan Höppner 105819508b20SJan Höppner rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); 105919508b20SJan Höppner if (rc) { 106019508b20SJan Höppner for (chp = 0; chp < 8; chp++) 106119508b20SJan Höppner device->path[chp].fc_security = 0; 106219508b20SJan Höppner return; 106319508b20SJan Höppner } 106419508b20SJan Höppner 106519508b20SJan Höppner for (chp = 0; chp < 8; chp++) { 106619508b20SJan Höppner if (esm_valid & (0x80 >> chp)) 106719508b20SJan Höppner device->path[chp].fc_security = esm[chp]; 106819508b20SJan Höppner else 106919508b20SJan Höppner device->path[chp].fc_security = 0; 1070c7c0c9deSStefan Haberland } 1071c7c0c9deSStefan Haberland } 1072c7c0c9deSStefan Haberland 1073542e30ceSStefan Haberland static void dasd_eckd_get_uid_string(struct dasd_conf *conf, 107423596961SStefan Haberland char *print_uid) 107523596961SStefan Haberland { 1076542e30ceSStefan Haberland struct dasd_uid uid; 107723596961SStefan Haberland 1078542e30ceSStefan Haberland create_uid(conf, &uid); 1079542e30ceSStefan Haberland if (strlen(uid.vduit) > 0) 108023596961SStefan Haberland snprintf(print_uid, sizeof(*print_uid), 108123596961SStefan Haberland "%s.%s.%04x.%02x.%s", 1082542e30ceSStefan Haberland uid.vendor, uid.serial, uid.ssid, 1083542e30ceSStefan Haberland uid.real_unit_addr, uid.vduit); 108423596961SStefan Haberland else 108523596961SStefan Haberland snprintf(print_uid, sizeof(*print_uid), 108623596961SStefan Haberland "%s.%s.%04x.%02x", 1087542e30ceSStefan Haberland uid.vendor, uid.serial, uid.ssid, 1088542e30ceSStefan Haberland uid.real_unit_addr); 108923596961SStefan Haberland } 109023596961SStefan Haberland 109123596961SStefan Haberland static int dasd_eckd_check_cabling(struct dasd_device *device, 109223596961SStefan Haberland void *conf_data, __u8 lpm) 109323596961SStefan Haberland { 109423596961SStefan Haberland struct dasd_eckd_private *private = device->private; 109523596961SStefan Haberland char print_path_uid[60], print_device_uid[60]; 1096542e30ceSStefan Haberland struct dasd_conf path_conf; 109723596961SStefan Haberland 1098542e30ceSStefan Haberland path_conf.data = conf_data; 1099542e30ceSStefan Haberland path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1100542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_conf)) 110123596961SStefan Haberland return 1; 110223596961SStefan Haberland 1103542e30ceSStefan Haberland if (dasd_eckd_compare_path_uid(device, &path_conf)) { 1104542e30ceSStefan Haberland dasd_eckd_get_uid_string(&path_conf, print_path_uid); 1105542e30ceSStefan Haberland dasd_eckd_get_uid_string(&private->conf, print_device_uid); 110623596961SStefan Haberland dev_err(&device->cdev->dev, 110723596961SStefan Haberland "Not all channel paths lead to the same device, path %02X leads to device %s instead of %s\n", 110823596961SStefan Haberland lpm, print_path_uid, print_device_uid); 110923596961SStefan Haberland return 1; 111023596961SStefan Haberland } 111123596961SStefan Haberland 111223596961SStefan Haberland return 0; 111323596961SStefan Haberland } 111423596961SStefan Haberland 11154abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 11161da177e4SLinus Torvalds { 11171da177e4SLinus Torvalds void *conf_data; 11181da177e4SLinus Torvalds int conf_len, conf_data_saved; 1119b179b037SStefan Haberland int rc, path_err, pos; 1120a4d26c6aSStefan Weinhuber __u8 lpm, opm; 112123596961SStefan Haberland struct dasd_eckd_private *private; 11221da177e4SLinus Torvalds 1123543691a4SSebastian Ott private = device->private; 1124a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 11251da177e4SLinus Torvalds conf_data_saved = 0; 112655d3a85cSStefan Haberland path_err = 0; 11271da177e4SLinus Torvalds /* get configuration data per operational path */ 11281da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1129b206181dSStefan Haberland if (!(lpm & opm)) 1130b206181dSStefan Haberland continue; 113117283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 11321da177e4SLinus Torvalds &conf_len, lpm); 11331da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1134b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 11351da177e4SLinus Torvalds "Read configuration data returned " 1136b8ed5dd5SStefan Haberland "error %d", rc); 11371da177e4SLinus Torvalds return rc; 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds if (conf_data == NULL) { 1140b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1141b8ed5dd5SStefan Haberland "No configuration data " 1142b8ed5dd5SStefan Haberland "retrieved"); 1143a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1144c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1145d133a960SGabriel Craciunescu continue; /* no error */ 11461da177e4SLinus Torvalds } 11471da177e4SLinus Torvalds /* save first valid configuration data */ 11481da177e4SLinus Torvalds if (!conf_data_saved) { 1149c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1150c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 1151542e30ceSStefan Haberland private->conf.data = conf_data; 1152542e30ceSStefan Haberland private->conf.len = conf_len; 1153542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&private->conf)) { 1154542e30ceSStefan Haberland private->conf.data = NULL; 1155542e30ceSStefan Haberland private->conf.len = 0; 11564abb08c2SStefan Weinhuber kfree(conf_data); 11574abb08c2SStefan Weinhuber continue; 11584abb08c2SStefan Weinhuber } 1159b206181dSStefan Haberland /* 1160b206181dSStefan Haberland * build device UID that other path data 1161b206181dSStefan Haberland * can be compared to it 1162b206181dSStefan Haberland */ 1163b206181dSStefan Haberland dasd_eckd_generate_uid(device); 11641da177e4SLinus Torvalds conf_data_saved++; 116523596961SStefan Haberland } else if (dasd_eckd_check_cabling(device, conf_data, lpm)) { 116623596961SStefan Haberland dasd_path_add_cablepm(device, lpm); 116723596961SStefan Haberland path_err = -EINVAL; 1168b206181dSStefan Haberland kfree(conf_data); 1169b206181dSStefan Haberland continue; 1170b206181dSStefan Haberland } 1171d2a52758SJan Höppner 1172d2a52758SJan Höppner pos = pathmask_to_pos(lpm); 1173d2a52758SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 1174d2a52758SJan Höppner 11754abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11761da177e4SLinus Torvalds case 0x02: 1177c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11781da177e4SLinus Torvalds break; 11791da177e4SLinus Torvalds case 0x03: 1180c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11811da177e4SLinus Torvalds break; 11821da177e4SLinus Torvalds } 1183c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1184c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1185ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1186ccc0e7dcSStefan Haberland } else { 1187c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1188ccc0e7dcSStefan Haberland } 11891da177e4SLinus Torvalds } 1190b206181dSStefan Haberland 119155d3a85cSStefan Haberland return path_err; 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 1194a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1195a521b048SStefan Haberland { 1196a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1197a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1198dd4b3c83SJan Höppner unsigned int mdc; 1199dd4b3c83SJan Höppner int tpm; 1200a521b048SStefan Haberland 1201a521b048SStefan Haberland if (dasd_nofcx) 1202a521b048SStefan Haberland return 0; 1203a521b048SStefan Haberland /* is transport mode supported? */ 1204a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1205542e30ceSStefan Haberland fcx_in_gneq = private->conf.gneq->reserved2[7] & 0x04; 1206a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1207a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1208a521b048SStefan Haberland 1209a521b048SStefan Haberland if (!tpm) 1210a521b048SStefan Haberland return 0; 1211a521b048SStefan Haberland 1212a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1213dd4b3c83SJan Höppner if (mdc == 0) { 1214a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1215a521b048SStefan Haberland return 0; 1216a521b048SStefan Haberland } else { 1217a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1218a521b048SStefan Haberland } 1219a521b048SStefan Haberland } 1220a521b048SStefan Haberland 1221a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1222a4d26c6aSStefan Weinhuber { 1223543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1224dd4b3c83SJan Höppner unsigned int mdc; 1225a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1226a4d26c6aSStefan Weinhuber 1227a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1228a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1229dd4b3c83SJan Höppner if (mdc == 0) { 1230a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1231a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1232a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1233a4d26c6aSStefan Weinhuber mdc, lpm); 1234a4d26c6aSStefan Weinhuber return mdc; 1235a4d26c6aSStefan Weinhuber } 12360f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1237a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1238a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1239a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1240a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1241a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1242a4d26c6aSStefan Weinhuber private->fcx_max_data); 1243a4d26c6aSStefan Weinhuber return -EACCES; 1244a4d26c6aSStefan Weinhuber } 1245a4d26c6aSStefan Weinhuber } 1246a4d26c6aSStefan Weinhuber return 0; 1247a4d26c6aSStefan Weinhuber } 1248a4d26c6aSStefan Weinhuber 1249b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1250b7294932SJan Höppner struct pe_handler_work_data *data) 1251b206181dSStefan Haberland { 1252543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1253c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1254543691a4SSebastian Ott int rc = -ENODEV; 1255b206181dSStefan Haberland 1256b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1257b206181dSStefan Haberland if (!(lpm & opm)) 1258b206181dSStefan Haberland continue; 1259b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1260b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1261b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1262b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1263b206181dSStefan Haberland data->rcd_buffer, 1264b206181dSStefan Haberland lpm); 1265b206181dSStefan Haberland 1266b206181dSStefan Haberland if (rc) { 1267b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1268b206181dSStefan Haberland continue; 1269b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1270b206181dSStefan Haberland "Read configuration data " 1271b206181dSStefan Haberland "returned error %d", rc); 1272b206181dSStefan Haberland break; 1273b206181dSStefan Haberland } 1274542e30ceSStefan Haberland memcpy(private->conf.data, data->rcd_buffer, 1275b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1276542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&private->conf)) { 1277b206181dSStefan Haberland rc = -ENODEV; 1278b206181dSStefan Haberland } else /* first valid path is enough */ 1279b206181dSStefan Haberland break; 1280b206181dSStefan Haberland } 1281b206181dSStefan Haberland 1282b206181dSStefan Haberland if (!rc) 1283b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1284b206181dSStefan Haberland 1285b206181dSStefan Haberland return rc; 1286b206181dSStefan Haberland } 1287b206181dSStefan Haberland 1288b7294932SJan Höppner static void dasd_eckd_path_available_action(struct dasd_device *device, 1289b7294932SJan Höppner struct pe_handler_work_data *data) 1290a4d26c6aSStefan Weinhuber { 1291b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12925db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 129346018121SJan Höppner struct dasd_conf_data *conf_data; 1294542e30ceSStefan Haberland struct dasd_conf path_conf; 1295a4d26c6aSStefan Weinhuber unsigned long flags; 1296b206181dSStefan Haberland char print_uid[60]; 129746018121SJan Höppner int rc, pos; 1298a4d26c6aSStefan Weinhuber 1299a4d26c6aSStefan Weinhuber opm = 0; 1300a4d26c6aSStefan Weinhuber npm = 0; 1301a4d26c6aSStefan Weinhuber ppm = 0; 1302a4d26c6aSStefan Weinhuber epm = 0; 13035db8440cSStefan Haberland hpfpm = 0; 13045db8440cSStefan Haberland cablepm = 0; 13055db8440cSStefan Haberland 1306a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1307b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1308b206181dSStefan Haberland continue; 1309b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1310a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1311a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1312a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1313a4d26c6aSStefan Weinhuber data->rcd_buffer, 1314a4d26c6aSStefan Weinhuber lpm); 1315a4d26c6aSStefan Weinhuber if (!rc) { 1316a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1317b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1318b206181dSStefan Haberland ) { 1319a4d26c6aSStefan Weinhuber case 0x02: 1320a4d26c6aSStefan Weinhuber npm |= lpm; 1321a4d26c6aSStefan Weinhuber break; 1322a4d26c6aSStefan Weinhuber case 0x03: 1323a4d26c6aSStefan Weinhuber ppm |= lpm; 1324a4d26c6aSStefan Weinhuber break; 1325a4d26c6aSStefan Weinhuber } 1326a4d26c6aSStefan Weinhuber opm |= lpm; 1327a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1328a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1329a4d26c6aSStefan Weinhuber "path verification: No configuration " 1330a4d26c6aSStefan Weinhuber "data retrieved"); 1331a4d26c6aSStefan Weinhuber opm |= lpm; 1332a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1333a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1334a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1335a4d26c6aSStefan Weinhuber " try again later"); 1336a4d26c6aSStefan Weinhuber epm |= lpm; 1337a4d26c6aSStefan Weinhuber } else { 1338a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1339a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1340a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1341a4d26c6aSStefan Weinhuber continue; 1342a4d26c6aSStefan Weinhuber } 1343a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1344a4d26c6aSStefan Weinhuber opm &= ~lpm; 1345a4d26c6aSStefan Weinhuber npm &= ~lpm; 1346a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13475db8440cSStefan Haberland hpfpm |= lpm; 1348b206181dSStefan Haberland continue; 1349b206181dSStefan Haberland } 1350b206181dSStefan Haberland 1351b206181dSStefan Haberland /* 1352b206181dSStefan Haberland * save conf_data for comparison after 1353b206181dSStefan Haberland * rebuild_device_uid may have changed 1354b206181dSStefan Haberland * the original data 1355b206181dSStefan Haberland */ 1356b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1357b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1358542e30ceSStefan Haberland path_conf.data = (void *)&path_rcd_buf; 1359542e30ceSStefan Haberland path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1360542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_conf)) { 1361542e30ceSStefan Haberland path_conf.data = NULL; 1362542e30ceSStefan Haberland path_conf.len = 0; 1363b206181dSStefan Haberland continue; 1364b206181dSStefan Haberland } 1365b206181dSStefan Haberland 1366b206181dSStefan Haberland /* 1367b206181dSStefan Haberland * compare path UID with device UID only if at least 1368b206181dSStefan Haberland * one valid path is left 1369b206181dSStefan Haberland * in other case the device UID may have changed and 1370b206181dSStefan Haberland * the first working path UID will be used as device UID 1371b206181dSStefan Haberland */ 1372c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1373542e30ceSStefan Haberland dasd_eckd_compare_path_uid(device, &path_conf)) { 1374b206181dSStefan Haberland /* 1375b206181dSStefan Haberland * the comparison was not successful 1376b206181dSStefan Haberland * rebuild the device UID with at least one 1377b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1378b206181dSStefan Haberland * has changed the device 1379b206181dSStefan Haberland * 1380b206181dSStefan Haberland * after this compare again 1381b206181dSStefan Haberland * 1382b206181dSStefan Haberland * if either the rebuild or the recompare fails 1383b206181dSStefan Haberland * the path can not be used 1384b206181dSStefan Haberland */ 1385b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1386b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1387542e30ceSStefan Haberland device, &path_conf)) { 1388542e30ceSStefan Haberland dasd_eckd_get_uid_string(&path_conf, print_uid); 1389b206181dSStefan Haberland dev_err(&device->cdev->dev, 1390b206181dSStefan Haberland "The newly added channel path %02X " 1391b206181dSStefan Haberland "will not be used because it leads " 1392b206181dSStefan Haberland "to a different device %s\n", 1393b206181dSStefan Haberland lpm, print_uid); 1394b206181dSStefan Haberland opm &= ~lpm; 1395b206181dSStefan Haberland npm &= ~lpm; 1396b206181dSStefan Haberland ppm &= ~lpm; 13975db8440cSStefan Haberland cablepm |= lpm; 1398b206181dSStefan Haberland continue; 1399a4d26c6aSStefan Weinhuber } 1400a4d26c6aSStefan Weinhuber } 1401b206181dSStefan Haberland 140246018121SJan Höppner conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); 140346018121SJan Höppner if (conf_data) { 140446018121SJan Höppner memcpy(conf_data, data->rcd_buffer, 140546018121SJan Höppner DASD_ECKD_RCD_DATA_SIZE); 14069dffede0SStefan Haberland } else { 14079dffede0SStefan Haberland /* 14089dffede0SStefan Haberland * path is operational but path config data could not 14099dffede0SStefan Haberland * be stored due to low mem condition 14109dffede0SStefan Haberland * add it to the error path mask and schedule a path 14119dffede0SStefan Haberland * verification later that this could be added again 14129dffede0SStefan Haberland */ 14139dffede0SStefan Haberland epm |= lpm; 141446018121SJan Höppner } 141546018121SJan Höppner pos = pathmask_to_pos(lpm); 141646018121SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 141746018121SJan Höppner 1418a4d26c6aSStefan Weinhuber /* 1419a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1420a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1421a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1422a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1423a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1424a4d26c6aSStefan Weinhuber */ 1425a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1426c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1427c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1428a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14295db8440cSStefan Haberland } else { 1430c9346151SStefan Haberland dasd_path_add_opm(device, opm); 14315db8440cSStefan Haberland } 1432c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1433c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 14349dffede0SStefan Haberland if (epm) { 1435c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 14369dffede0SStefan Haberland dasd_device_set_timer(device, 50); 14379dffede0SStefan Haberland } 1438c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1439c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1440a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 144119508b20SJan Höppner 144219508b20SJan Höppner dasd_path_create_kobj(device, pos); 1443b206181dSStefan Haberland } 1444b7294932SJan Höppner } 1445b7294932SJan Höppner 1446b7294932SJan Höppner static void do_pe_handler_work(struct work_struct *work) 1447b7294932SJan Höppner { 1448b7294932SJan Höppner struct pe_handler_work_data *data; 1449b7294932SJan Höppner struct dasd_device *device; 1450b7294932SJan Höppner 1451b7294932SJan Höppner data = container_of(work, struct pe_handler_work_data, worker); 1452b7294932SJan Höppner device = data->device; 1453b7294932SJan Höppner 1454b7294932SJan Höppner /* delay path verification until device was resumed */ 1455b7294932SJan Höppner if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1456b7294932SJan Höppner schedule_work(work); 1457b7294932SJan Höppner return; 1458b7294932SJan Höppner } 1459b7294932SJan Höppner /* check if path verification already running and delay if so */ 1460b7294932SJan Höppner if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1461b7294932SJan Höppner schedule_work(work); 1462b7294932SJan Höppner return; 1463b7294932SJan Höppner } 1464b7294932SJan Höppner 14654d063e64SJan Höppner if (data->tbvpm) 1466b7294932SJan Höppner dasd_eckd_path_available_action(device, data); 14674d063e64SJan Höppner if (data->fcsecpm) 14684d063e64SJan Höppner dasd_eckd_read_fc_security(device); 1469b7294932SJan Höppner 14701eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1471a4d26c6aSStefan Weinhuber dasd_put_device(device); 1472a4d26c6aSStefan Weinhuber if (data->isglobal) 1473b7294932SJan Höppner mutex_unlock(&dasd_pe_handler_mutex); 1474a4d26c6aSStefan Weinhuber else 1475a4d26c6aSStefan Weinhuber kfree(data); 1476a4d26c6aSStefan Weinhuber } 1477a4d26c6aSStefan Weinhuber 14784d063e64SJan Höppner static int dasd_eckd_pe_handler(struct dasd_device *device, 14794d063e64SJan Höppner __u8 tbvpm, __u8 fcsecpm) 1480a4d26c6aSStefan Weinhuber { 1481b7294932SJan Höppner struct pe_handler_work_data *data; 1482a4d26c6aSStefan Weinhuber 1483f1c8781aSHaowen Bai data = kzalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1484a4d26c6aSStefan Weinhuber if (!data) { 1485b7294932SJan Höppner if (mutex_trylock(&dasd_pe_handler_mutex)) { 1486b7294932SJan Höppner data = pe_handler_worker; 1487a4d26c6aSStefan Weinhuber data->isglobal = 1; 1488b7294932SJan Höppner } else { 1489a4d26c6aSStefan Weinhuber return -ENOMEM; 1490b7294932SJan Höppner } 1491a4d26c6aSStefan Weinhuber } 1492b7294932SJan Höppner INIT_WORK(&data->worker, do_pe_handler_work); 1493a4d26c6aSStefan Weinhuber dasd_get_device(device); 1494a4d26c6aSStefan Weinhuber data->device = device; 14954d063e64SJan Höppner data->tbvpm = tbvpm; 14964d063e64SJan Höppner data->fcsecpm = fcsecpm; 1497a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1498a4d26c6aSStefan Weinhuber return 0; 1499a4d26c6aSStefan Weinhuber } 1500a4d26c6aSStefan Weinhuber 1501a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1502a521b048SStefan Haberland { 1503a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1504a521b048SStefan Haberland unsigned long flags; 1505a521b048SStefan Haberland 1506a521b048SStefan Haberland if (!private->fcx_max_data) 1507a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1508a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1509a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1510a521b048SStefan Haberland dasd_schedule_device_bh(device); 1511a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1512a521b048SStefan Haberland } 1513a521b048SStefan Haberland 15148e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 15158e09f215SStefan Weinhuber { 1516543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 15178e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 15188e09f215SStefan Weinhuber struct dasd_rssd_features *features; 15198e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 15208e09f215SStefan Weinhuber struct ccw1 *ccw; 15218e09f215SStefan Weinhuber int rc; 15228e09f215SStefan Weinhuber 152368d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 152468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 15258e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 15268e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1527c5205f2fSSebastian Ott device, NULL); 15288e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1529b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1530b8ed5dd5SStefan Haberland "allocate initialization request"); 15318e09f215SStefan Weinhuber return PTR_ERR(cqr); 15328e09f215SStefan Weinhuber } 15338e09f215SStefan Weinhuber cqr->startdev = device; 15348e09f215SStefan Weinhuber cqr->memdev = device; 15358e09f215SStefan Weinhuber cqr->block = NULL; 1536eb6e199bSStefan Weinhuber cqr->retries = 256; 15378e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 15388e09f215SStefan Weinhuber 15398e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 15408e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15418e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 15428e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 15438e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 15448e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 15458e09f215SStefan Weinhuber 15468e09f215SStefan Weinhuber ccw = cqr->cpaddr; 15478e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 15488e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 15498e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 15508e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 15518e09f215SStefan Weinhuber 15528e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 15538e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15548e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15558e09f215SStefan Weinhuber 15568e09f215SStefan Weinhuber ccw++; 15578e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15588e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 15598e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 15608e09f215SStefan Weinhuber 15611aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15628e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15638e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15648e09f215SStefan Weinhuber if (rc == 0) { 15658e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15668e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15678e09f215SStefan Weinhuber memcpy(&private->features, features, 15688e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 156968d1e5f0SStefan Weinhuber } else 157068d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 157168d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15728e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15738e09f215SStefan Weinhuber return rc; 15748e09f215SStefan Weinhuber } 15758e09f215SStefan Weinhuber 1576c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1577c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1578c729696bSJan Höppner { 1579c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1580c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1581c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1582c729696bSJan Höppner struct dasd_ccw_req *cqr; 1583c729696bSJan Höppner struct ccw1 *ccw; 15849e12e54cSJan Höppner int useglobal; 1585c729696bSJan Höppner int rc; 1586c729696bSJan Höppner 1587c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1588c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1589c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1590c729696bSJan Höppner return 0; 1591c729696bSJan Höppner 15929e12e54cSJan Höppner useglobal = 0; 1593c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1594c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1595c729696bSJan Höppner if (IS_ERR(cqr)) { 1596c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1597c729696bSJan Höppner "Could not allocate initialization request"); 15989e12e54cSJan Höppner mutex_lock(&dasd_vol_info_mutex); 15999e12e54cSJan Höppner useglobal = 1; 16009e12e54cSJan Höppner cqr = &dasd_vol_info_req->cqr; 16019e12e54cSJan Höppner memset(cqr, 0, sizeof(*cqr)); 16029e12e54cSJan Höppner memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 16039e12e54cSJan Höppner cqr->cpaddr = &dasd_vol_info_req->ccw; 16049e12e54cSJan Höppner cqr->data = &dasd_vol_info_req->data; 16059e12e54cSJan Höppner cqr->magic = DASD_ECKD_MAGIC; 1606c729696bSJan Höppner } 1607c729696bSJan Höppner 1608c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1609c729696bSJan Höppner prssdp = cqr->data; 1610c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1611c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1612542e30ceSStefan Haberland prssdp->lss = private->conf.ned->ID; 1613542e30ceSStefan Haberland prssdp->volume = private->conf.ned->unit_addr; 1614c729696bSJan Höppner 1615c729696bSJan Höppner ccw = cqr->cpaddr; 1616c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1617c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1618c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1619c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1620c729696bSJan Höppner 1621c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1622c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1623c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1624c729696bSJan Höppner 1625c729696bSJan Höppner ccw++; 1626c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1627c729696bSJan Höppner ccw->count = sizeof(*vsq); 1628c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1629c729696bSJan Höppner ccw->cda = (__u32)(addr_t)vsq; 1630c729696bSJan Höppner 1631c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1632c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1633c729696bSJan Höppner cqr->startdev = device; 1634c729696bSJan Höppner cqr->memdev = device; 1635c729696bSJan Höppner cqr->block = NULL; 1636c729696bSJan Höppner cqr->retries = 256; 1637c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1638c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1639c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1640c729696bSJan Höppner 1641c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1642c729696bSJan Höppner if (rc == 0) { 1643c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1644c729696bSJan Höppner } else { 1645dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1646dd454839SJan Höppner "Reading the volume storage information failed with rc=%d", rc); 1647c729696bSJan Höppner } 1648c729696bSJan Höppner 16499e12e54cSJan Höppner if (useglobal) 16509e12e54cSJan Höppner mutex_unlock(&dasd_vol_info_mutex); 16519e12e54cSJan Höppner else 1652c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1653c729696bSJan Höppner 1654c729696bSJan Höppner return rc; 1655c729696bSJan Höppner } 1656c729696bSJan Höppner 1657c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1658c729696bSJan Höppner { 1659c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1660c729696bSJan Höppner 1661c729696bSJan Höppner return private->vsq.vol_info.ese; 1662c729696bSJan Höppner } 1663c729696bSJan Höppner 1664c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1665c729696bSJan Höppner { 1666c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1667c729696bSJan Höppner 1668c729696bSJan Höppner return private->vsq.extent_pool_id; 1669c729696bSJan Höppner } 1670c729696bSJan Höppner 1671c729696bSJan Höppner /* 1672c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1673c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1674c729696bSJan Höppner * The data for this value is therefore updated on any call. 1675c729696bSJan Höppner */ 1676c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1677c729696bSJan Höppner { 1678c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1679c729696bSJan Höppner int rc; 1680c729696bSJan Höppner 1681c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1682c729696bSJan Höppner 1683c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1684c729696bSJan Höppner } 1685c729696bSJan Höppner 1686c729696bSJan Höppner /* 1687c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1688c729696bSJan Höppner * therefore updated on any call. 1689c729696bSJan Höppner */ 1690c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1691c729696bSJan Höppner { 1692c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1693c729696bSJan Höppner int rc; 1694c729696bSJan Höppner 1695c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1696c729696bSJan Höppner 1697c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1698c729696bSJan Höppner } 1699c729696bSJan Höppner 1700c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1701c729696bSJan Höppner { 1702c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1703c729696bSJan Höppner 1704c729696bSJan Höppner return private->vsq.logical_capacity; 1705c729696bSJan Höppner } 1706c729696bSJan Höppner 17079e12e54cSJan Höppner static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 17089e12e54cSJan Höppner { 17099e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17109e12e54cSJan Höppner struct dasd_device *device; 17119e12e54cSJan Höppner struct dasd_device *base; 17129e12e54cSJan Höppner 17139e12e54cSJan Höppner data = container_of(work, struct ext_pool_exhaust_work_data, worker); 17149e12e54cSJan Höppner device = data->device; 17159e12e54cSJan Höppner base = data->base; 17169e12e54cSJan Höppner 17179e12e54cSJan Höppner if (!base) 17189e12e54cSJan Höppner base = device; 17199e12e54cSJan Höppner if (dasd_eckd_space_configured(base) != 0) { 17209e12e54cSJan Höppner dasd_generic_space_avail(device); 17219e12e54cSJan Höppner } else { 17229e12e54cSJan Höppner dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 17239e12e54cSJan Höppner DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 17249e12e54cSJan Höppner } 17259e12e54cSJan Höppner 17269e12e54cSJan Höppner dasd_put_device(device); 17279e12e54cSJan Höppner kfree(data); 17289e12e54cSJan Höppner } 17299e12e54cSJan Höppner 17309e12e54cSJan Höppner static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 17319e12e54cSJan Höppner struct dasd_ccw_req *cqr) 17329e12e54cSJan Höppner { 17339e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17349e12e54cSJan Höppner 17359e12e54cSJan Höppner data = kzalloc(sizeof(*data), GFP_ATOMIC); 17369e12e54cSJan Höppner if (!data) 17379e12e54cSJan Höppner return -ENOMEM; 17389e12e54cSJan Höppner INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 17399e12e54cSJan Höppner dasd_get_device(device); 17409e12e54cSJan Höppner data->device = device; 17419e12e54cSJan Höppner 17429e12e54cSJan Höppner if (cqr->block) 17439e12e54cSJan Höppner data->base = cqr->block->base; 17449e12e54cSJan Höppner else if (cqr->basedev) 17459e12e54cSJan Höppner data->base = cqr->basedev; 17469e12e54cSJan Höppner else 17479e12e54cSJan Höppner data->base = NULL; 17489e12e54cSJan Höppner 17499e12e54cSJan Höppner schedule_work(&data->worker); 17509e12e54cSJan Höppner 17519e12e54cSJan Höppner return 0; 17529e12e54cSJan Höppner } 17539e12e54cSJan Höppner 1754c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1755c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1756c729696bSJan Höppner { 1757c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1758c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1759c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1760c729696bSJan Höppner int i; 1761c729696bSJan Höppner 1762c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1763c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1764c729696bSJan Höppner if (eps.pool_id == pool_id) { 1765c729696bSJan Höppner memcpy(&private->eps, &eps, 1766c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1767c729696bSJan Höppner } 1768c729696bSJan Höppner } 1769c729696bSJan Höppner } 1770c729696bSJan Höppner 1771c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1772c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1773c729696bSJan Höppner { 1774c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1775c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1776c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1777c729696bSJan Höppner struct dasd_ccw_req *cqr; 1778c729696bSJan Höppner struct ccw1 *ccw; 1779c729696bSJan Höppner int rc; 1780c729696bSJan Höppner 1781c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1782c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1783c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1784c729696bSJan Höppner return 0; 1785c729696bSJan Höppner 1786c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1787c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1788c729696bSJan Höppner if (IS_ERR(cqr)) { 1789c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1790c729696bSJan Höppner "Could not allocate initialization request"); 1791c729696bSJan Höppner return PTR_ERR(cqr); 1792c729696bSJan Höppner } 1793c729696bSJan Höppner 1794c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1795c729696bSJan Höppner prssdp = cqr->data; 1796c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1797c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1798c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1799c729696bSJan Höppner 1800c729696bSJan Höppner ccw = cqr->cpaddr; 1801c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1802c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1803c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1804c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1805c729696bSJan Höppner 1806c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1807c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1808c729696bSJan Höppner 1809c729696bSJan Höppner ccw++; 1810c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1811c729696bSJan Höppner ccw->count = sizeof(*lcq); 1812c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1813c729696bSJan Höppner ccw->cda = (__u32)(addr_t)lcq; 1814c729696bSJan Höppner 1815c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1816c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1817c729696bSJan Höppner cqr->startdev = device; 1818c729696bSJan Höppner cqr->memdev = device; 1819c729696bSJan Höppner cqr->block = NULL; 1820c729696bSJan Höppner cqr->retries = 256; 1821c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1822c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1823c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1824c729696bSJan Höppner 1825c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1826c729696bSJan Höppner if (rc == 0) { 1827c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1828c729696bSJan Höppner } else { 1829dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1830dd454839SJan Höppner "Reading the logical configuration failed with rc=%d", rc); 1831c729696bSJan Höppner } 1832c729696bSJan Höppner 1833c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1834c729696bSJan Höppner 1835c729696bSJan Höppner return rc; 1836c729696bSJan Höppner } 1837c729696bSJan Höppner 1838c729696bSJan Höppner /* 1839c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1840c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1841c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1842c729696bSJan Höppner */ 1843c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1844c729696bSJan Höppner { 1845c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1846c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1847c729696bSJan Höppner 1848c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1849c729696bSJan Höppner return 0; 1850c729696bSJan Höppner if (eps.extent_size.size_1G) 1851c729696bSJan Höppner return 1113; 1852c729696bSJan Höppner if (eps.extent_size.size_16M) 1853c729696bSJan Höppner return 21; 1854c729696bSJan Höppner 1855c729696bSJan Höppner return 0; 1856c729696bSJan Höppner } 1857c729696bSJan Höppner 1858c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1859c729696bSJan Höppner { 1860c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1861c729696bSJan Höppner 1862c729696bSJan Höppner return private->eps.warn_thrshld; 1863c729696bSJan Höppner } 1864c729696bSJan Höppner 1865c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1866c729696bSJan Höppner { 1867c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1868c729696bSJan Höppner 1869c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1870c729696bSJan Höppner } 1871c729696bSJan Höppner 1872c729696bSJan Höppner /* 1873c729696bSJan Höppner * Extent Pool out of space 1874c729696bSJan Höppner */ 1875c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1876c729696bSJan Höppner { 1877c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1878c729696bSJan Höppner 1879c729696bSJan Höppner return private->eps.flags.pool_oos; 1880c729696bSJan Höppner } 18818e09f215SStefan Weinhuber 18823d052595SHorst Hummel /* 188340545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 188440545573SHorst Hummel */ 1885f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1886f3eb5384SStefan Weinhuber int enable_pav) 188740545573SHorst Hummel { 188840545573SHorst Hummel struct dasd_ccw_req *cqr; 188940545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 189040545573SHorst Hummel struct ccw1 *ccw; 189140545573SHorst Hummel 189268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 189340545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1894c5205f2fSSebastian Ott device, NULL); 189540545573SHorst Hummel 189640545573SHorst Hummel if (IS_ERR(cqr)) { 1897fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 189840545573SHorst Hummel "Could not allocate PSF-SSC request"); 189940545573SHorst Hummel return cqr; 190040545573SHorst Hummel } 190140545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 190240545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1903626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1904f3eb5384SStefan Weinhuber if (enable_pav) { 1905626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 19068e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1907f3eb5384SStefan Weinhuber } 190840545573SHorst Hummel ccw = cqr->cpaddr; 190940545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 191040545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 191140545573SHorst Hummel ccw->count = 66; 191240545573SHorst Hummel 19138e09f215SStefan Weinhuber cqr->startdev = device; 19148e09f215SStefan Weinhuber cqr->memdev = device; 19158e09f215SStefan Weinhuber cqr->block = NULL; 1916eb6e199bSStefan Weinhuber cqr->retries = 256; 191740545573SHorst Hummel cqr->expires = 10*HZ; 19181aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 191940545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 192040545573SHorst Hummel return cqr; 192140545573SHorst Hummel } 192240545573SHorst Hummel 192340545573SHorst Hummel /* 192440545573SHorst Hummel * Perform Subsystem Function. 192540545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 192640545573SHorst Hummel * call might change behaviour of DASD devices. 192740545573SHorst Hummel */ 192840545573SHorst Hummel static int 192912d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 193012d7b107SStefan Haberland unsigned long flags) 193140545573SHorst Hummel { 193240545573SHorst Hummel struct dasd_ccw_req *cqr; 193340545573SHorst Hummel int rc; 193440545573SHorst Hummel 1935f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 193640545573SHorst Hummel if (IS_ERR(cqr)) 193740545573SHorst Hummel return PTR_ERR(cqr); 193840545573SHorst Hummel 193912d7b107SStefan Haberland /* 194012d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 194112d7b107SStefan Haberland * the calling function should handle failed requests 194212d7b107SStefan Haberland */ 194312d7b107SStefan Haberland cqr->flags |= flags; 194412d7b107SStefan Haberland 194540545573SHorst Hummel rc = dasd_sleep_on(cqr); 194640545573SHorst Hummel if (!rc) 194740545573SHorst Hummel /* trigger CIO to reprobe devices */ 194840545573SHorst Hummel css_schedule_reprobe(); 194912d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 195012d7b107SStefan Haberland rc = -EAGAIN; 195112d7b107SStefan Haberland 19528e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 195340545573SHorst Hummel return rc; 195440545573SHorst Hummel } 195540545573SHorst Hummel 195640545573SHorst Hummel /* 195740545573SHorst Hummel * Valide storage server of current device. 195840545573SHorst Hummel */ 195912d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 196012d7b107SStefan Haberland unsigned long flags) 196140545573SHorst Hummel { 1962543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1963543691a4SSebastian Ott int enable_pav, rc; 196440545573SHorst Hummel 1965f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1966f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 196712d7b107SStefan Haberland return 0; 196840545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1969f3eb5384SStefan Weinhuber enable_pav = 0; 1970f3eb5384SStefan Weinhuber else 1971f3eb5384SStefan Weinhuber enable_pav = 1; 197212d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1973eb6e199bSStefan Weinhuber 197440545573SHorst Hummel /* may be requested feature is not available on server, 197540545573SHorst Hummel * therefore just report error and go ahead */ 1976b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1977b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 197812d7b107SStefan Haberland return rc; 197940545573SHorst Hummel } 198040545573SHorst Hummel 1981f1633031SStefan Haberland /* 1982f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1983f1633031SStefan Haberland */ 1984f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1985f1633031SStefan Haberland { 1986f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1987f1633031SStefan Haberland kick_validate); 1988ea4da6eaSStefan Haberland unsigned long flags = 0; 1989ea4da6eaSStefan Haberland 1990ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1991ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 199212d7b107SStefan Haberland == -EAGAIN) { 199312d7b107SStefan Haberland /* schedule worker again if failed */ 199412d7b107SStefan Haberland schedule_work(&device->kick_validate); 199512d7b107SStefan Haberland return; 199612d7b107SStefan Haberland } 199712d7b107SStefan Haberland 1998f1633031SStefan Haberland dasd_put_device(device); 1999f1633031SStefan Haberland } 2000f1633031SStefan Haberland 2001f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 2002f1633031SStefan Haberland { 2003f1633031SStefan Haberland dasd_get_device(device); 200425e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 200525e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 200625e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 200725e2cf1cSStefan Haberland dasd_put_device(device); 200825e2cf1cSStefan Haberland return; 200925e2cf1cSStefan Haberland } 2010f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 2011f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 2012f2608cd4SStefan Haberland dasd_put_device(device); 2013f1633031SStefan Haberland } 2014f1633031SStefan Haberland 2015a91ff09dSStefan Haberland /* 2016a91ff09dSStefan Haberland * return if the device is the copy relation primary if a copy relation is active 2017a91ff09dSStefan Haberland */ 2018a91ff09dSStefan Haberland static int dasd_device_is_primary(struct dasd_device *device) 2019a91ff09dSStefan Haberland { 2020a91ff09dSStefan Haberland if (!device->copy) 2021a91ff09dSStefan Haberland return 1; 2022a91ff09dSStefan Haberland 2023a91ff09dSStefan Haberland if (device->copy->active->device == device) 2024a91ff09dSStefan Haberland return 1; 2025a91ff09dSStefan Haberland 2026a91ff09dSStefan Haberland return 0; 2027a91ff09dSStefan Haberland } 2028a91ff09dSStefan Haberland 20292b43bf06SStefan Haberland static int dasd_eckd_alloc_block(struct dasd_device *device) 20302b43bf06SStefan Haberland { 20312b43bf06SStefan Haberland struct dasd_block *block; 20322b43bf06SStefan Haberland struct dasd_uid temp_uid; 20332b43bf06SStefan Haberland 2034a91ff09dSStefan Haberland if (!dasd_device_is_primary(device)) 2035a91ff09dSStefan Haberland return 0; 2036a91ff09dSStefan Haberland 20372b43bf06SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 20382b43bf06SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 20392b43bf06SStefan Haberland block = dasd_alloc_block(); 20402b43bf06SStefan Haberland if (IS_ERR(block)) { 20412b43bf06SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 20422b43bf06SStefan Haberland "could not allocate dasd block structure"); 20432b43bf06SStefan Haberland return PTR_ERR(block); 20442b43bf06SStefan Haberland } 20452b43bf06SStefan Haberland device->block = block; 20462b43bf06SStefan Haberland block->base = device; 20472b43bf06SStefan Haberland } 20482b43bf06SStefan Haberland return 0; 20492b43bf06SStefan Haberland } 20502b43bf06SStefan Haberland 2051a91ff09dSStefan Haberland static bool dasd_eckd_pprc_enabled(struct dasd_device *device) 2052a91ff09dSStefan Haberland { 2053a91ff09dSStefan Haberland struct dasd_eckd_private *private = device->private; 2054a91ff09dSStefan Haberland 2055a91ff09dSStefan Haberland return private->rdc_data.facilities.PPRC_enabled; 2056a91ff09dSStefan Haberland } 2057a91ff09dSStefan Haberland 205840545573SHorst Hummel /* 20593d052595SHorst Hummel * Check device characteristics. 20603d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 20613d052595SHorst Hummel */ 20621da177e4SLinus Torvalds static int 20631da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 20641da177e4SLinus Torvalds { 2065543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 2066f9f8d02fSStefan Haberland int rc, i; 206733b62a30SStefan Weinhuber int readonly; 20687c8faa86SStefan Haberland unsigned long value; 20691da177e4SLinus Torvalds 2070f1633031SStefan Haberland /* setup work queue for validate server*/ 2071f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 207259a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 207359a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 2074f1633031SStefan Haberland 2075454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 2076454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 2077454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 2078454e1fa1SPeter Oberparleiter return -EIO; 2079454e1fa1SPeter Oberparleiter } 2080454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 2081454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 2082454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 2083454e1fa1SPeter Oberparleiter } 208492636b15SSebastian Ott if (!private) { 208592636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 208692636b15SSebastian Ott if (!private) { 2087fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2088fc19f381SStefan Haberland "Allocating memory for private DASD data " 2089fc19f381SStefan Haberland "failed\n"); 20901da177e4SLinus Torvalds return -ENOMEM; 20911da177e4SLinus Torvalds } 2092543691a4SSebastian Ott device->private = private; 209392636b15SSebastian Ott } else { 209492636b15SSebastian Ott memset(private, 0, sizeof(*private)); 20951da177e4SLinus Torvalds } 20961da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 20971da177e4SLinus Torvalds private->init_cqr_status = -1; 20981da177e4SLinus Torvalds /* Set default cache operations. */ 20991da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 21001da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 21011da177e4SLinus Torvalds 210240545573SHorst Hummel /* Read Configuration Data */ 210340545573SHorst Hummel rc = dasd_eckd_read_conf(device); 210440545573SHorst Hummel if (rc) 21058e09f215SStefan Weinhuber goto out_err1; 210640545573SHorst Hummel 2107a521b048SStefan Haberland /* set some default values */ 21087c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 21091f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 2110a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2111a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 21121f1ee9adSHannes Reinecke 2113542e30ceSStefan Haberland if (private->conf.gneq) { 21147c8faa86SStefan Haberland value = 1; 2115542e30ceSStefan Haberland for (i = 0; i < private->conf.gneq->timeout.value; i++) 21167c8faa86SStefan Haberland value = 10 * value; 2117542e30ceSStefan Haberland value = value * private->conf.gneq->timeout.number; 21187c8faa86SStefan Haberland /* do not accept useless values */ 21197c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 21207c8faa86SStefan Haberland device->default_expires = value; 21217c8faa86SStefan Haberland } 21227c8faa86SStefan Haberland 2123a91ff09dSStefan Haberland /* Read Device Characteristics */ 2124a91ff09dSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 2125a91ff09dSStefan Haberland &private->rdc_data, 64); 2126a91ff09dSStefan Haberland if (rc) { 2127a91ff09dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2128a91ff09dSStefan Haberland "Read device characteristic failed, rc=%d", rc); 2129a91ff09dSStefan Haberland goto out_err1; 2130a91ff09dSStefan Haberland } 2131a91ff09dSStefan Haberland 2132a91ff09dSStefan Haberland /* setup PPRC for device from devmap */ 2133a91ff09dSStefan Haberland rc = dasd_devmap_set_device_copy_relation(device->cdev, 2134a91ff09dSStefan Haberland dasd_eckd_pprc_enabled(device)); 2135a91ff09dSStefan Haberland if (rc) { 2136a91ff09dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2137a91ff09dSStefan Haberland "copy relation setup failed, rc=%d", rc); 2138a91ff09dSStefan Haberland goto out_err1; 2139a91ff09dSStefan Haberland } 2140a91ff09dSStefan Haberland 21412b43bf06SStefan Haberland /* check if block device is needed and allocate in case */ 21422b43bf06SStefan Haberland rc = dasd_eckd_alloc_block(device); 21432b43bf06SStefan Haberland if (rc) 21448e09f215SStefan Weinhuber goto out_err1; 21458e09f215SStefan Weinhuber 2146f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 2147f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 2148f9f8d02fSStefan Haberland if (rc) 21498e09f215SStefan Weinhuber goto out_err2; 2150f9f8d02fSStefan Haberland 215112d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 2152f4ac1d02SStefan Weinhuber 2153f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 2154f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 215540545573SHorst Hummel if (rc) 21568e09f215SStefan Weinhuber goto out_err3; 21578e09f215SStefan Weinhuber 215874e2f211SStefan Haberland dasd_eckd_read_fc_security(device); 215919508b20SJan Höppner dasd_path_create_kobjects(device); 216019508b20SJan Höppner 21618e09f215SStefan Weinhuber /* Read Feature Codes */ 216268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 216340545573SHorst Hummel 2164c729696bSJan Höppner /* Read Volume Information */ 2165dd454839SJan Höppner dasd_eckd_read_vol_info(device); 2166c729696bSJan Höppner 2167c729696bSJan Höppner /* Read Extent Pool Information */ 2168dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 2169c729696bSJan Höppner 217034cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 217134cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 217234cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 217334cd551aSStefan Haberland "support raw-track access\n"); 217434cd551aSStefan Haberland rc = -EINVAL; 217534cd551aSStefan Haberland goto out_err3; 217634cd551aSStefan Haberland } 217734cd551aSStefan Haberland 2178817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 2179b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2180b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 2181b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 2182b44b0ab3SStefan Weinhuber else 2183b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 2184b44b0ab3SStefan Weinhuber 2185ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 2186ef19298bSStefan Weinhuber 218733b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 218833b62a30SStefan Weinhuber if (readonly) 218933b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 219033b62a30SStefan Weinhuber 2191fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 219233b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 21931da177e4SLinus Torvalds private->rdc_data.dev_type, 21941da177e4SLinus Torvalds private->rdc_data.dev_model, 21951da177e4SLinus Torvalds private->rdc_data.cu_type, 21961da177e4SLinus Torvalds private->rdc_data.cu_model.model, 2197b44b0ab3SStefan Weinhuber private->real_cyl, 21981da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 219933b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 220033b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 22018e09f215SStefan Weinhuber return 0; 22028e09f215SStefan Weinhuber 22038e09f215SStefan Weinhuber out_err3: 22048e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 22058e09f215SStefan Weinhuber out_err2: 22068e09f215SStefan Weinhuber dasd_free_block(device->block); 22078e09f215SStefan Weinhuber device->block = NULL; 22088e09f215SStefan Weinhuber out_err1: 220900b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 2210ac55ad2bSJan Höppner dasd_path_remove_kobjects(device); 22118e09f215SStefan Weinhuber kfree(device->private); 22128e09f215SStefan Weinhuber device->private = NULL; 22133d052595SHorst Hummel return rc; 22141da177e4SLinus Torvalds } 22151da177e4SLinus Torvalds 22168e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 22178e09f215SStefan Weinhuber { 2218543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22194abb08c2SStefan Weinhuber 22207c6553d4SStefan Haberland if (!private) 22217c6553d4SStefan Haberland return; 22227c6553d4SStefan Haberland 22238e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 2224542e30ceSStefan Haberland private->conf.ned = NULL; 2225542e30ceSStefan Haberland private->conf.sneq = NULL; 2226542e30ceSStefan Haberland private->conf.vdsneq = NULL; 2227542e30ceSStefan Haberland private->conf.gneq = NULL; 222800b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 2229ac55ad2bSJan Höppner dasd_path_remove_kobjects(device); 22308e09f215SStefan Weinhuber } 22318e09f215SStefan Weinhuber 22321da177e4SLinus Torvalds static struct dasd_ccw_req * 22331da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 22341da177e4SLinus Torvalds { 2235543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22361da177e4SLinus Torvalds struct eckd_count *count_data; 22371da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 22381da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 22391da177e4SLinus Torvalds struct ccw1 *ccw; 22401da177e4SLinus Torvalds int cplength, datasize; 22411da177e4SLinus Torvalds int i; 22421da177e4SLinus Torvalds 22431da177e4SLinus Torvalds cplength = 8; 22441da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2245c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2246c5205f2fSSebastian Ott NULL); 22471da177e4SLinus Torvalds if (IS_ERR(cqr)) 22481da177e4SLinus Torvalds return cqr; 22491da177e4SLinus Torvalds ccw = cqr->cpaddr; 2250ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2251ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 225245f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 22531da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 22541da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 22551da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22561da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 22571da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22581da177e4SLinus Torvalds 22591da177e4SLinus Torvalds count_data = private->count_area; 22601da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22611da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22621da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22631da177e4SLinus Torvalds ccw->flags = 0; 22641da177e4SLinus Torvalds ccw->count = 8; 22651da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 22661da177e4SLinus Torvalds ccw++; 22671da177e4SLinus Torvalds count_data++; 22681da177e4SLinus Torvalds } 22691da177e4SLinus Torvalds 2270ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 22711da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2272ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 22731da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22741da177e4SLinus Torvalds /* Read count ccw. */ 22751da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22761da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22771da177e4SLinus Torvalds ccw->flags = 0; 22781da177e4SLinus Torvalds ccw->count = 8; 22791da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 22801da177e4SLinus Torvalds 22818e09f215SStefan Weinhuber cqr->block = NULL; 22828e09f215SStefan Weinhuber cqr->startdev = device; 22838e09f215SStefan Weinhuber cqr->memdev = device; 2284eb6e199bSStefan Weinhuber cqr->retries = 255; 22851aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 22861da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 22879e12e54cSJan Höppner /* Set flags to suppress output for expected errors */ 22889e12e54cSJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22899e12e54cSJan Höppner 22901da177e4SLinus Torvalds return cqr; 22911da177e4SLinus Torvalds } 22921da177e4SLinus Torvalds 2293eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2294eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2295eb6e199bSStefan Weinhuber { 2296eb6e199bSStefan Weinhuber char *sense; 2297eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2298eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2299eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2300eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2301eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2302eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2303eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2304eb6e199bSStefan Weinhuber else 2305eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2306eb6e199bSStefan Weinhuber } else 2307eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2308eb6e199bSStefan Weinhuber } 2309eb6e199bSStefan Weinhuber 23101da177e4SLinus Torvalds /* 23111da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 23121da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 23131da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 23141da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 23151da177e4SLinus Torvalds * for deletion in the meantime). 23161da177e4SLinus Torvalds */ 2317eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2318eb6e199bSStefan Weinhuber void *data) 23191da177e4SLinus Torvalds { 2320543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2321543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 23221da177e4SLinus Torvalds 2323eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 23241da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 23251da177e4SLinus Torvalds dasd_kick_device(device); 23261da177e4SLinus Torvalds } 23271da177e4SLinus Torvalds 2328eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 23291da177e4SLinus Torvalds { 23301da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 23311da177e4SLinus Torvalds 23328e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 23331da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 23341da177e4SLinus Torvalds return PTR_ERR(init_cqr); 23351da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 23361da177e4SLinus Torvalds init_cqr->callback_data = NULL; 23371da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2338eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2339eb6e199bSStefan Weinhuber * devices as special case 2340eb6e199bSStefan Weinhuber */ 2341eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2342eb6e199bSStefan Weinhuber init_cqr->retries = 0; 23431da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 23441da177e4SLinus Torvalds return -EAGAIN; 23451da177e4SLinus Torvalds } 23461da177e4SLinus Torvalds 2347eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 23481da177e4SLinus Torvalds { 2349543691a4SSebastian Ott struct dasd_device *device = block->base; 2350543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 23511da177e4SLinus Torvalds struct eckd_count *count_area; 23521da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 23531da177e4SLinus Torvalds int status, i; 2354eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 23551da177e4SLinus Torvalds 23561da177e4SLinus Torvalds status = private->init_cqr_status; 23571da177e4SLinus Torvalds private->init_cqr_status = -1; 2358eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2359eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2360eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2361eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2362eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2363eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2364eb6e199bSStefan Weinhuber } 2365eb6e199bSStefan Weinhuber 2366e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2367e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2368e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2369e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2370e4dbb0f2SStefan Haberland goto raw; 2371e4dbb0f2SStefan Haberland } 2372e4dbb0f2SStefan Haberland 2373eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2374eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 23751da177e4SLinus Torvalds return -EMEDIUMTYPE; 2376eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2377eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2378eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2379eb6e199bSStefan Weinhuber "of an I/O error\n"); 2380eb6e199bSStefan Weinhuber return -EIO; 23811da177e4SLinus Torvalds } 23821da177e4SLinus Torvalds 23831da177e4SLinus Torvalds private->uses_cdl = 1; 23841da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 23851da177e4SLinus Torvalds count_area = NULL; 23861da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 23871da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 23883bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 23893bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23903bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23913bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 23921da177e4SLinus Torvalds private->uses_cdl = 0; 23931da177e4SLinus Torvalds break; 23941da177e4SLinus Torvalds } 23951da177e4SLinus Torvalds } 23961da177e4SLinus Torvalds if (i == 3) 2397ce6915f5SJan Höppner count_area = &private->count_area[3]; 23981da177e4SLinus Torvalds 23991da177e4SLinus Torvalds if (private->uses_cdl == 0) { 24001da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 24011da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 24021da177e4SLinus Torvalds (private->count_area[i].dl != 24033bc9fef9SStefan Haberland private->count_area[0].dl) || 24043bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 24053bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 24063bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 24071da177e4SLinus Torvalds break; 24081da177e4SLinus Torvalds } 24091da177e4SLinus Torvalds if (i == 5) 24101da177e4SLinus Torvalds count_area = &private->count_area[0]; 24111da177e4SLinus Torvalds } else { 24121da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2413fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2414fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 24151da177e4SLinus Torvalds } 2416e4dbb0f2SStefan Haberland 24171da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 24181da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 24191da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 24208e09f215SStefan Weinhuber block->bp_block = count_area->dl; 24211da177e4SLinus Torvalds } 24228e09f215SStefan Weinhuber if (block->bp_block == 0) { 2423fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2424fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 24251da177e4SLinus Torvalds return -EMEDIUMTYPE; 24261da177e4SLinus Torvalds } 24278e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 24288e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 24298e09f215SStefan Weinhuber block->s2b_shift++; 24301da177e4SLinus Torvalds 24318e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2432e4dbb0f2SStefan Haberland 2433e4dbb0f2SStefan Haberland raw: 24342cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 24351da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 24361da177e4SLinus Torvalds blk_per_trk); 24371da177e4SLinus Torvalds 2438fc19f381SStefan Haberland dev_info(&device->cdev->dev, 24392cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2440fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 24412cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 24421da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 24438e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 24448e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 24451da177e4SLinus Torvalds private->uses_cdl ? 24461da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 24471da177e4SLinus Torvalds 24481da177e4SLinus Torvalds return 0; 24491da177e4SLinus Torvalds } 24501da177e4SLinus Torvalds 24518e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 24521da177e4SLinus Torvalds { 2453543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24541da177e4SLinus Torvalds 24551da177e4SLinus Torvalds if (private->init_cqr_status < 0) 24568e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 24571da177e4SLinus Torvalds else 24588e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 24591da177e4SLinus Torvalds } 24601da177e4SLinus Torvalds 2461d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 24628e09f215SStefan Weinhuber { 24638e09f215SStefan Weinhuber return dasd_alias_add_device(device); 24648e09f215SStefan Weinhuber }; 24658e09f215SStefan Weinhuber 24668e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 24678e09f215SStefan Weinhuber { 2468669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2469669f3765SStefan Haberland dasd_put_device(device); 2470669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2471669f3765SStefan Haberland dasd_put_device(device); 2472669f3765SStefan Haberland 2473d42e1712SStefan Haberland return 0; 2474d42e1712SStefan Haberland }; 2475d42e1712SStefan Haberland 2476daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2477d42e1712SStefan Haberland { 24788e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 24798e09f215SStefan Weinhuber }; 24808e09f215SStefan Weinhuber 24811da177e4SLinus Torvalds static int 24828e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 24831da177e4SLinus Torvalds { 2484543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24851da177e4SLinus Torvalds 24868e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 24871da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 24888e09f215SStefan Weinhuber 0, block->bp_block); 24891da177e4SLinus Torvalds } 24901da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 24911da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 24921da177e4SLinus Torvalds return 0; 24931da177e4SLinus Torvalds } 24941da177e4SLinus Torvalds 24958fd57520SJan Höppner /* 24968fd57520SJan Höppner * Build the TCW request for the format check 24978fd57520SJan Höppner */ 24988fd57520SJan Höppner static struct dasd_ccw_req * 24998fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 25008fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 25018fd57520SJan Höppner int rpt) 25028fd57520SJan Höppner { 25038fd57520SJan Höppner struct dasd_eckd_private *start_priv; 25048fd57520SJan Höppner struct dasd_device *startdev = NULL; 25058fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 25068fd57520SJan Höppner struct dasd_ccw_req *cqr; 25078fd57520SJan Höppner struct itcw *itcw; 25088fd57520SJan Höppner int itcw_size; 25098fd57520SJan Höppner int count; 25108fd57520SJan Höppner int rc; 25118fd57520SJan Höppner int i; 25128fd57520SJan Höppner 25138fd57520SJan Höppner if (enable_pav) 25148fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 25158fd57520SJan Höppner 25168fd57520SJan Höppner if (!startdev) 25178fd57520SJan Höppner startdev = base; 25188fd57520SJan Höppner 25198fd57520SJan Höppner start_priv = startdev->private; 25208fd57520SJan Höppner 25218fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 25228fd57520SJan Höppner 25238fd57520SJan Höppner /* 25248fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 25258fd57520SJan Höppner * calculate the corresponding itcw_size 25268fd57520SJan Höppner */ 25278fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 25288fd57520SJan Höppner 25295e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 25308fd57520SJan Höppner if (IS_ERR(cqr)) 25318fd57520SJan Höppner return cqr; 25328fd57520SJan Höppner 25338fd57520SJan Höppner start_priv->count++; 25348fd57520SJan Höppner 25358fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 25368fd57520SJan Höppner if (IS_ERR(itcw)) { 25378fd57520SJan Höppner rc = -EINVAL; 25388fd57520SJan Höppner goto out_err; 25398fd57520SJan Höppner } 25408fd57520SJan Höppner 25418fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 25428fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 25438fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 25448fd57520SJan Höppner sizeof(struct eckd_count), 25458fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 25468fd57520SJan Höppner if (rc) 25478fd57520SJan Höppner goto out_err; 25488fd57520SJan Höppner 25498fd57520SJan Höppner for (i = 0; i < count; i++) { 25508fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 25518fd57520SJan Höppner sizeof(struct eckd_count)); 25528fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 25538fd57520SJan Höppner rc = -EINVAL; 25548fd57520SJan Höppner goto out_err; 25558fd57520SJan Höppner } 25568fd57520SJan Höppner } 25578fd57520SJan Höppner 25588fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 25598fd57520SJan Höppner itcw_finalize(itcw); 25608fd57520SJan Höppner 25618fd57520SJan Höppner cqr->cpmode = 1; 25628fd57520SJan Höppner cqr->startdev = startdev; 25638fd57520SJan Höppner cqr->memdev = startdev; 25648fd57520SJan Höppner cqr->basedev = base; 25658fd57520SJan Höppner cqr->retries = startdev->default_retries; 25668fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 25678fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 25688fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 25698fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 25708fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 25718fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 25728fd57520SJan Höppner 25738fd57520SJan Höppner return cqr; 25748fd57520SJan Höppner 25758fd57520SJan Höppner out_err: 25768fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 25778fd57520SJan Höppner 25788fd57520SJan Höppner return ERR_PTR(rc); 25798fd57520SJan Höppner } 25808fd57520SJan Höppner 25818fd57520SJan Höppner /* 25828fd57520SJan Höppner * Build the CCW request for the format check 25838fd57520SJan Höppner */ 25848fd57520SJan Höppner static struct dasd_ccw_req * 25858fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 25868fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 25878fd57520SJan Höppner { 25888fd57520SJan Höppner struct dasd_eckd_private *start_priv; 25898fd57520SJan Höppner struct dasd_eckd_private *base_priv; 25908fd57520SJan Höppner struct dasd_device *startdev = NULL; 25918fd57520SJan Höppner struct dasd_ccw_req *cqr; 25928fd57520SJan Höppner struct ccw1 *ccw; 25938fd57520SJan Höppner void *data; 25948fd57520SJan Höppner int cplength, datasize; 25958fd57520SJan Höppner int use_prefix; 25968fd57520SJan Höppner int count; 25978fd57520SJan Höppner int i; 25988fd57520SJan Höppner 25998fd57520SJan Höppner if (enable_pav) 26008fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 26018fd57520SJan Höppner 26028fd57520SJan Höppner if (!startdev) 26038fd57520SJan Höppner startdev = base; 26048fd57520SJan Höppner 26058fd57520SJan Höppner start_priv = startdev->private; 26068fd57520SJan Höppner base_priv = base->private; 26078fd57520SJan Höppner 26088fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 26098fd57520SJan Höppner 26108fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 26118fd57520SJan Höppner 26128fd57520SJan Höppner if (use_prefix) { 26138fd57520SJan Höppner cplength = 1; 26148fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 26158fd57520SJan Höppner } else { 26168fd57520SJan Höppner cplength = 2; 26178fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 26188fd57520SJan Höppner sizeof(struct LO_eckd_data); 26198fd57520SJan Höppner } 26208fd57520SJan Höppner cplength += count; 26218fd57520SJan Höppner 26225e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 26238fd57520SJan Höppner if (IS_ERR(cqr)) 26248fd57520SJan Höppner return cqr; 26258fd57520SJan Höppner 26268fd57520SJan Höppner start_priv->count++; 26278fd57520SJan Höppner data = cqr->data; 26288fd57520SJan Höppner ccw = cqr->cpaddr; 26298fd57520SJan Höppner 26308fd57520SJan Höppner if (use_prefix) { 26318fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 26328fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 26338fd57520SJan Höppner count, 0, 0); 26348fd57520SJan Höppner } else { 26358fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 263645f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 26378fd57520SJan Höppner 26388fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 26398fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 26408fd57520SJan Höppner 26418fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 26428fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 26438fd57520SJan Höppner } 26448fd57520SJan Höppner 26458fd57520SJan Höppner for (i = 0; i < count; i++) { 26468fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 26478fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 26488fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 26498fd57520SJan Höppner ccw->count = 8; 26508fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 26518fd57520SJan Höppner ccw++; 26528fd57520SJan Höppner fmt_buffer++; 26538fd57520SJan Höppner } 26548fd57520SJan Höppner 26558fd57520SJan Höppner cqr->startdev = startdev; 26568fd57520SJan Höppner cqr->memdev = startdev; 26578fd57520SJan Höppner cqr->basedev = base; 26588fd57520SJan Höppner cqr->retries = DASD_RETRIES; 26598fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 26608fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 26618fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 26628fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 26638fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 26648fd57520SJan Höppner 26658fd57520SJan Höppner return cqr; 26668fd57520SJan Höppner } 26678fd57520SJan Höppner 26681da177e4SLinus Torvalds static struct dasd_ccw_req * 26695e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 26705e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 26711da177e4SLinus Torvalds { 2672d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2673d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 26741da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 26751da177e4SLinus Torvalds struct eckd_count *ect; 2676d42e1712SStefan Haberland struct ch_t address; 26771da177e4SLinus Torvalds struct ccw1 *ccw; 26781da177e4SLinus Torvalds void *data; 2679b44b0ab3SStefan Weinhuber int rpt; 26801da177e4SLinus Torvalds int cplength, datasize; 2681d42e1712SStefan Haberland int i, j; 2682f9a28f7bSJean-Baptiste Joret int intensity = 0; 2683f9a28f7bSJean-Baptiste Joret int r0_perm; 2684d42e1712SStefan Haberland int nr_tracks; 268518d6624eSStefan Haberland int use_prefix; 26861da177e4SLinus Torvalds 2687a94fa154SStefan Haberland if (enable_pav) 2688d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 268929b8dd9dSStefan Haberland 2690d42e1712SStefan Haberland if (!startdev) 2691d42e1712SStefan Haberland startdev = base; 26921da177e4SLinus Torvalds 2693543691a4SSebastian Ott start_priv = startdev->private; 2694543691a4SSebastian Ott base_priv = base->private; 2695d42e1712SStefan Haberland 2696d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2697d42e1712SStefan Haberland 2698d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 26991da177e4SLinus Torvalds 27001da177e4SLinus Torvalds /* 27011da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 27021da177e4SLinus Torvalds * Bit 0: write record zero 27031da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 27041da177e4SLinus Torvalds * Bit 2: invalidate tracks 27051da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2706f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 27071da177e4SLinus Torvalds * Only some bit combinations do make sense. 27081da177e4SLinus Torvalds */ 2709f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2710f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2711f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2712f9a28f7bSJean-Baptiste Joret } else { 2713f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2714f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2715f9a28f7bSJean-Baptiste Joret } 2716d42e1712SStefan Haberland 271718d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 271818d6624eSStefan Haberland 2719f9a28f7bSJean-Baptiste Joret switch (intensity) { 27201da177e4SLinus Torvalds case 0x00: /* Normal format */ 27211da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2722d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 272318d6624eSStefan Haberland if (use_prefix) 2724d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27251da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2726d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 272718d6624eSStefan Haberland else 272818d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 272918d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 273018d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 27311da177e4SLinus Torvalds break; 27321da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 27331da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2734d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 273518d6624eSStefan Haberland if (use_prefix) 2736d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27371da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 27381da177e4SLinus Torvalds sizeof(struct eckd_count) + 2739d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 274018d6624eSStefan Haberland else 274118d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 274218d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 274318d6624eSStefan Haberland sizeof(struct eckd_count) + 274418d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 27451da177e4SLinus Torvalds break; 27461da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 27471da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 27481da177e4SLinus Torvalds cplength = 3; 274918d6624eSStefan Haberland if (use_prefix) 2750d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27511da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 27521da177e4SLinus Torvalds sizeof(struct eckd_count); 275318d6624eSStefan Haberland else 275418d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 275518d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 275618d6624eSStefan Haberland sizeof(struct eckd_count); 27571da177e4SLinus Torvalds break; 27581da177e4SLinus Torvalds default: 2759d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2760d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2761d42e1712SStefan Haberland fdata->intensity); 27621da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 27631da177e4SLinus Torvalds } 27645e2b17e7SJan Höppner 27655e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 27661da177e4SLinus Torvalds if (IS_ERR(fcp)) 27671da177e4SLinus Torvalds return fcp; 27681da177e4SLinus Torvalds 2769d42e1712SStefan Haberland start_priv->count++; 27701da177e4SLinus Torvalds data = fcp->data; 27711da177e4SLinus Torvalds ccw = fcp->cpaddr; 27721da177e4SLinus Torvalds 2773f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 27741da177e4SLinus Torvalds case 0x00: /* Normal format. */ 277518d6624eSStefan Haberland if (use_prefix) { 2776d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2777d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2778d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2779f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2780f9a28f7bSJean-Baptiste Joret if (r0_perm) 2781d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2782d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2783d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 278418d6624eSStefan Haberland } else { 278518d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 278618d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 278745f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 278818d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 278918d6624eSStefan Haberland if (r0_perm) 279018d6624eSStefan Haberland ((struct DE_eckd_data *) data) 279118d6624eSStefan Haberland ->ga_extended |= 0x04; 279218d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 279318d6624eSStefan Haberland } 27941da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27951da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2796d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2797d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 27981da177e4SLinus Torvalds fdata->blksize); 27991da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 28001da177e4SLinus Torvalds break; 28011da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 280218d6624eSStefan Haberland if (use_prefix) { 2803d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2804d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 28051da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2806d42e1712SStefan Haberland base, startdev); 2807d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 280818d6624eSStefan Haberland } else { 280918d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 281018d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 281145f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 281218d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 281318d6624eSStefan Haberland } 28141da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28151da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2816d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2817d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2818d42e1712SStefan Haberland base->block->bp_block); 28191da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 28201da177e4SLinus Torvalds break; 28211da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 282218d6624eSStefan Haberland if (use_prefix) { 2823d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2824d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2825d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2826d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 282718d6624eSStefan Haberland } else { 282818d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 282918d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 283045f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 283118d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 283218d6624eSStefan Haberland } 28331da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28341da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 28351da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2836d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 28371da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 28381da177e4SLinus Torvalds break; 28391da177e4SLinus Torvalds } 2840d42e1712SStefan Haberland 2841d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2842d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2843d42e1712SStefan Haberland set_ch_t(&address, 2844d42e1712SStefan Haberland (fdata->start_unit + j) / 2845d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2846d42e1712SStefan Haberland (fdata->start_unit + j) % 2847d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2848f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 28491da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28501da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2851b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2852b44b0ab3SStefan Weinhuber ect->head = address.head; 28531da177e4SLinus Torvalds ect->record = 0; 28541da177e4SLinus Torvalds ect->kl = 0; 28551da177e4SLinus Torvalds ect->dl = 8; 28561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28571da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 28581da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28591da177e4SLinus Torvalds ccw->count = 8; 28601da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28611da177e4SLinus Torvalds ccw++; 28621da177e4SLinus Torvalds } 2863f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 28641da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28651da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2866b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2867b44b0ab3SStefan Weinhuber ect->head = address.head; 28681da177e4SLinus Torvalds ect->record = 1; 28691da177e4SLinus Torvalds ect->kl = 0; 28701da177e4SLinus Torvalds ect->dl = 0; 28711da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28721da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 28731da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28741da177e4SLinus Torvalds ccw->count = 8; 28751da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28761da177e4SLinus Torvalds } else { /* write remaining records */ 28771da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 28781da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28791da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2880b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2881b44b0ab3SStefan Weinhuber ect->head = address.head; 28821da177e4SLinus Torvalds ect->record = i + 1; 28831da177e4SLinus Torvalds ect->kl = 0; 28841da177e4SLinus Torvalds ect->dl = fdata->blksize; 2885d42e1712SStefan Haberland /* 2886d42e1712SStefan Haberland * Check for special tracks 0-1 2887d42e1712SStefan Haberland * when formatting CDL 2888d42e1712SStefan Haberland */ 2889f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 289046d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 28911da177e4SLinus Torvalds if (i < 3) { 28921da177e4SLinus Torvalds ect->kl = 4; 28931da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 28941da177e4SLinus Torvalds } 28951da177e4SLinus Torvalds } 2896f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 289746d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 28981da177e4SLinus Torvalds ect->kl = 44; 28991da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 29001da177e4SLinus Torvalds } 29011da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2902d42e1712SStefan Haberland if (i != 0 || j == 0) 2903d42e1712SStefan Haberland ccw->cmd_code = 2904d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2905d42e1712SStefan Haberland else 2906d42e1712SStefan Haberland ccw->cmd_code = 2907d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 29081da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 29091da177e4SLinus Torvalds ccw->count = 8; 29101da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 29111da177e4SLinus Torvalds ccw++; 29121da177e4SLinus Torvalds } 29131da177e4SLinus Torvalds } 2914d42e1712SStefan Haberland } 2915d42e1712SStefan Haberland 2916d42e1712SStefan Haberland fcp->startdev = startdev; 2917d42e1712SStefan Haberland fcp->memdev = startdev; 291829b8dd9dSStefan Haberland fcp->basedev = base; 2919eb6e199bSStefan Weinhuber fcp->retries = 256; 2920d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 29211aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 29221da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2923d42e1712SStefan Haberland 29241da177e4SLinus Torvalds return fcp; 29251da177e4SLinus Torvalds } 29261da177e4SLinus Torvalds 2927570d237cSJan Höppner /* 2928570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2929570d237cSJan Höppner */ 2930570d237cSJan Höppner static struct dasd_ccw_req * 2931570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 29328fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 29338fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2934d42e1712SStefan Haberland { 29358fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 29368fd57520SJan Höppner 29378fd57520SJan Höppner if (!fmt_buffer) { 29385e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 29398fd57520SJan Höppner } else { 29408fd57520SJan Höppner if (tpm) 29418fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 29428fd57520SJan Höppner enable_pav, 29438fd57520SJan Höppner fmt_buffer, rpt); 29448fd57520SJan Höppner else 29458fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 29468fd57520SJan Höppner fmt_buffer, rpt); 29478fd57520SJan Höppner } 29488fd57520SJan Höppner 29498fd57520SJan Höppner return ccw_req; 2950570d237cSJan Höppner } 2951570d237cSJan Höppner 2952570d237cSJan Höppner /* 2953570d237cSJan Höppner * Sanity checks on format_data 2954570d237cSJan Höppner */ 2955570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2956570d237cSJan Höppner struct format_data_t *fdata) 2957570d237cSJan Höppner { 2958543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2959d42e1712SStefan Haberland 2960d42e1712SStefan Haberland if (fdata->start_unit >= 2961d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2962d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2963d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2964d42e1712SStefan Haberland fdata->start_unit); 2965d42e1712SStefan Haberland return -EINVAL; 2966d42e1712SStefan Haberland } 2967d42e1712SStefan Haberland if (fdata->stop_unit >= 2968d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2969d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2970d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2971d42e1712SStefan Haberland fdata->stop_unit); 2972d42e1712SStefan Haberland return -EINVAL; 2973d42e1712SStefan Haberland } 2974d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2975d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2976d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2977d42e1712SStefan Haberland fdata->start_unit); 2978d42e1712SStefan Haberland return -EINVAL; 2979d42e1712SStefan Haberland } 2980d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2981d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2982d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2983d42e1712SStefan Haberland fdata->blksize); 2984d42e1712SStefan Haberland return -EINVAL; 2985d42e1712SStefan Haberland } 2986570d237cSJan Höppner return 0; 2987570d237cSJan Höppner } 2988570d237cSJan Höppner 2989570d237cSJan Höppner /* 2990570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2991570d237cSJan Höppner */ 2992570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2993570d237cSJan Höppner struct format_data_t *fdata, 29948fd57520SJan Höppner int enable_pav, int tpm, 29958fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 29968fd57520SJan Höppner struct irb *irb) 2997570d237cSJan Höppner { 2998543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2999570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 3000570d237cSJan Höppner struct list_head format_queue; 3001570d237cSJan Höppner struct dasd_device *device; 30028fd57520SJan Höppner char *sense = NULL; 3003570d237cSJan Höppner int old_start, old_stop, format_step; 3004570d237cSJan Höppner int step, retry; 3005570d237cSJan Höppner int rc; 3006570d237cSJan Höppner 3007570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 3008570d237cSJan Höppner if (rc) 3009570d237cSJan Höppner return rc; 3010d42e1712SStefan Haberland 3011d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 3012d42e1712SStefan Haberland 301346d1c03cSJan Höppner old_start = fdata->start_unit; 301429b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 3015d42e1712SStefan Haberland 30168fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 30178fd57520SJan Höppner /* Command Mode / Format Check */ 30188fd57520SJan Höppner format_step = 1; 30198fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 30208fd57520SJan Höppner /* Transport Mode / Format Check */ 30218fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 30228fd57520SJan Höppner } else { 30238fd57520SJan Höppner /* Normal Formatting */ 30248fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 30258fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 30268fd57520SJan Höppner } 30278fd57520SJan Höppner 302846d1c03cSJan Höppner do { 302946d1c03cSJan Höppner retry = 0; 3030d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 3031d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 303246d1c03cSJan Höppner if (step > format_step) { 303346d1c03cSJan Höppner fdata->stop_unit = 303446d1c03cSJan Höppner fdata->start_unit + format_step - 1; 303546d1c03cSJan Höppner } 3036d42e1712SStefan Haberland 3037570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 30388fd57520SJan Höppner enable_pav, tpm, 30398fd57520SJan Höppner fmt_buffer, rpt); 3040d42e1712SStefan Haberland if (IS_ERR(cqr)) { 304146d1c03cSJan Höppner rc = PTR_ERR(cqr); 304246d1c03cSJan Höppner if (rc == -ENOMEM) { 304346d1c03cSJan Höppner if (list_empty(&format_queue)) 304446d1c03cSJan Höppner goto out; 3045d42e1712SStefan Haberland /* 304646d1c03cSJan Höppner * not enough memory available, start 304746d1c03cSJan Höppner * requests retry after first requests 304846d1c03cSJan Höppner * were finished 3049d42e1712SStefan Haberland */ 305046d1c03cSJan Höppner retry = 1; 305146d1c03cSJan Höppner break; 3052d42e1712SStefan Haberland } 305346d1c03cSJan Höppner goto out_err; 305446d1c03cSJan Höppner } 305546d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 3056d42e1712SStefan Haberland 30578fd57520SJan Höppner if (fmt_buffer) { 30588fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 30598fd57520SJan Höppner fmt_buffer += rpt * step; 30608fd57520SJan Höppner } 3061d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 3062d42e1712SStefan Haberland fdata->stop_unit = old_stop; 3063d42e1712SStefan Haberland } 3064d42e1712SStefan Haberland 306546d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 3066d42e1712SStefan Haberland 306746d1c03cSJan Höppner out_err: 3068d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 3069d42e1712SStefan Haberland device = cqr->startdev; 3070543691a4SSebastian Ott private = device->private; 30718fd57520SJan Höppner 30728fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 30738fd57520SJan Höppner /* 30748fd57520SJan Höppner * Only get sense data if called by format 30758fd57520SJan Höppner * check 30768fd57520SJan Höppner */ 30778fd57520SJan Höppner if (fmt_buffer && irb) { 30788fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 30798fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 30808fd57520SJan Höppner } 3081d42e1712SStefan Haberland rc = -EIO; 30828fd57520SJan Höppner } 3083d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 30845e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 3085d42e1712SStefan Haberland private->count--; 3086d42e1712SStefan Haberland } 3087d42e1712SStefan Haberland 30888fd57520SJan Höppner if (rc && rc != -EIO) 308946d1c03cSJan Höppner goto out; 30908fd57520SJan Höppner if (rc == -EIO) { 30918fd57520SJan Höppner /* 30928fd57520SJan Höppner * In case fewer than the expected records are on the 30938fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 30948fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 30958fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 30968fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 30978fd57520SJan Höppner * and continue. 30988fd57520SJan Höppner */ 30998fd57520SJan Höppner if (sense && 31008fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 31018fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 31028fd57520SJan Höppner retry = 1; 31038fd57520SJan Höppner else 31048fd57520SJan Höppner goto out; 31058fd57520SJan Höppner } 310629b8dd9dSStefan Haberland 310746d1c03cSJan Höppner } while (retry); 310846d1c03cSJan Höppner 310946d1c03cSJan Höppner out: 311046d1c03cSJan Höppner fdata->start_unit = old_start; 311146d1c03cSJan Höppner fdata->stop_unit = old_stop; 3112d42e1712SStefan Haberland 3113d42e1712SStefan Haberland return rc; 3114d42e1712SStefan Haberland } 3115d42e1712SStefan Haberland 3116570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 3117570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 3118570d237cSJan Höppner { 31198fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 31208fd57520SJan Höppner 0, NULL); 31218fd57520SJan Höppner } 31228fd57520SJan Höppner 31235e6bdd37SStefan Haberland static bool test_and_set_format_track(struct dasd_format_entry *to_format, 312471f38716SStefan Haberland struct dasd_ccw_req *cqr) 31255e6bdd37SStefan Haberland { 312671f38716SStefan Haberland struct dasd_block *block = cqr->block; 31275e6bdd37SStefan Haberland struct dasd_format_entry *format; 31285e6bdd37SStefan Haberland unsigned long flags; 31295e6bdd37SStefan Haberland bool rc = false; 31305e6bdd37SStefan Haberland 31315e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 313271f38716SStefan Haberland if (cqr->trkcount != atomic_read(&block->trkcount)) { 313371f38716SStefan Haberland /* 313471f38716SStefan Haberland * The number of formatted tracks has changed after request 313571f38716SStefan Haberland * start and we can not tell if the current track was involved. 313671f38716SStefan Haberland * To avoid data corruption treat it as if the current track is 313771f38716SStefan Haberland * involved 313871f38716SStefan Haberland */ 313971f38716SStefan Haberland rc = true; 314071f38716SStefan Haberland goto out; 314171f38716SStefan Haberland } 31425e6bdd37SStefan Haberland list_for_each_entry(format, &block->format_list, list) { 31435e6bdd37SStefan Haberland if (format->track == to_format->track) { 31445e6bdd37SStefan Haberland rc = true; 31455e6bdd37SStefan Haberland goto out; 31465e6bdd37SStefan Haberland } 31475e6bdd37SStefan Haberland } 31485e6bdd37SStefan Haberland list_add_tail(&to_format->list, &block->format_list); 31495e6bdd37SStefan Haberland 31505e6bdd37SStefan Haberland out: 31515e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 31525e6bdd37SStefan Haberland return rc; 31535e6bdd37SStefan Haberland } 31545e6bdd37SStefan Haberland 31555e6bdd37SStefan Haberland static void clear_format_track(struct dasd_format_entry *format, 31565e6bdd37SStefan Haberland struct dasd_block *block) 31575e6bdd37SStefan Haberland { 31585e6bdd37SStefan Haberland unsigned long flags; 31595e6bdd37SStefan Haberland 31605e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 316171f38716SStefan Haberland atomic_inc(&block->trkcount); 31625e6bdd37SStefan Haberland list_del_init(&format->list); 31635e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 31645e6bdd37SStefan Haberland } 31655e6bdd37SStefan Haberland 31668fd57520SJan Höppner /* 31675e2b17e7SJan Höppner * Callback function to free ESE format requests. 31685e2b17e7SJan Höppner */ 31695e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 31705e2b17e7SJan Höppner { 31715e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 31725e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 31735e6bdd37SStefan Haberland struct dasd_format_entry *format = data; 31745e2b17e7SJan Höppner 31755e6bdd37SStefan Haberland clear_format_track(format, cqr->basedev->block); 31765e2b17e7SJan Höppner private->count--; 31775e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 31785e2b17e7SJan Höppner } 31795e2b17e7SJan Höppner 31805e2b17e7SJan Höppner static struct dasd_ccw_req * 31815e6bdd37SStefan Haberland dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 31825e6bdd37SStefan Haberland struct irb *irb) 31835e2b17e7SJan Höppner { 31845e2b17e7SJan Höppner struct dasd_eckd_private *private; 31855e6bdd37SStefan Haberland struct dasd_format_entry *format; 31865e2b17e7SJan Höppner struct format_data_t fdata; 31875e2b17e7SJan Höppner unsigned int recs_per_trk; 31885e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 31895e2b17e7SJan Höppner struct dasd_device *base; 31905e2b17e7SJan Höppner struct dasd_block *block; 31915e2b17e7SJan Höppner unsigned int blksize; 31925e2b17e7SJan Höppner struct request *req; 31935e2b17e7SJan Höppner sector_t first_trk; 31945e2b17e7SJan Höppner sector_t last_trk; 31955e6bdd37SStefan Haberland sector_t curr_trk; 31965e2b17e7SJan Höppner int rc; 31975e2b17e7SJan Höppner 31985b53a405SStefan Haberland req = dasd_get_callback_data(cqr); 31995e6bdd37SStefan Haberland block = cqr->block; 32005e6bdd37SStefan Haberland base = block->base; 32015e2b17e7SJan Höppner private = base->private; 32025e2b17e7SJan Höppner blksize = block->bp_block; 32035e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32045e6bdd37SStefan Haberland format = &startdev->format_entry; 32055e2b17e7SJan Höppner 32065e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 32075e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 32085e2b17e7SJan Höppner last_trk = 32095e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 32105e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 32115e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 32125e6bdd37SStefan Haberland if (rc) 32135e6bdd37SStefan Haberland return ERR_PTR(rc); 32145e2b17e7SJan Höppner 32155e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 32165e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, startdev, 32175e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 32185e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 32195e6bdd37SStefan Haberland return ERR_PTR(-EINVAL); 32205e6bdd37SStefan Haberland } 32215e6bdd37SStefan Haberland format->track = curr_trk; 32225e6bdd37SStefan Haberland /* test if track is already in formatting by another thread */ 322371f38716SStefan Haberland if (test_and_set_format_track(format, cqr)) { 322471f38716SStefan Haberland /* this is no real error so do not count down retries */ 322571f38716SStefan Haberland cqr->retries++; 32265e6bdd37SStefan Haberland return ERR_PTR(-EEXIST); 322771f38716SStefan Haberland } 32285e6bdd37SStefan Haberland 32295e6bdd37SStefan Haberland fdata.start_unit = curr_trk; 32305e6bdd37SStefan Haberland fdata.stop_unit = curr_trk; 32315e2b17e7SJan Höppner fdata.blksize = blksize; 32325e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 32335e2b17e7SJan Höppner 32345e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 32355e2b17e7SJan Höppner if (rc) 32365e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 32375e2b17e7SJan Höppner 32385e2b17e7SJan Höppner /* 32395e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 32405e2b17e7SJan Höppner * the former startdev. 32415e2b17e7SJan Höppner */ 32425e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 32435e2b17e7SJan Höppner if (IS_ERR(fcqr)) 32445e2b17e7SJan Höppner return fcqr; 32455e2b17e7SJan Höppner 32465e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 32475e6bdd37SStefan Haberland fcqr->callback_data = (void *) format; 32485e2b17e7SJan Höppner 32495e2b17e7SJan Höppner return fcqr; 32505e2b17e7SJan Höppner } 32515e2b17e7SJan Höppner 32525e2b17e7SJan Höppner /* 32535e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 32545e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 32555e6bdd37SStefan Haberland * 32565e6bdd37SStefan Haberland * The first unformatted track is the one that got the NRF error, the address is 32575e6bdd37SStefan Haberland * encoded in the sense data. 32585e6bdd37SStefan Haberland * 32595e6bdd37SStefan Haberland * All tracks before have returned valid data and should not be touched. 32605e6bdd37SStefan Haberland * All tracks after the unformatted track might be formatted or not. This is 32615e6bdd37SStefan Haberland * currently not known, remember the processed data and return the remainder of 32625e6bdd37SStefan Haberland * the request to the blocklayer in __dasd_cleanup_cqr(). 32635e2b17e7SJan Höppner */ 32645e6bdd37SStefan Haberland static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 32655e2b17e7SJan Höppner { 32665e6bdd37SStefan Haberland struct dasd_eckd_private *private; 32675e6bdd37SStefan Haberland sector_t first_trk, last_trk; 32685e6bdd37SStefan Haberland sector_t first_blk, last_blk; 32695e2b17e7SJan Höppner unsigned int blksize, off; 32705e6bdd37SStefan Haberland unsigned int recs_per_trk; 32715e2b17e7SJan Höppner struct dasd_device *base; 32725e2b17e7SJan Höppner struct req_iterator iter; 32735e6bdd37SStefan Haberland struct dasd_block *block; 32745e6bdd37SStefan Haberland unsigned int skip_block; 32755e6bdd37SStefan Haberland unsigned int blk_count; 32765e2b17e7SJan Höppner struct request *req; 32775e2b17e7SJan Höppner struct bio_vec bv; 32785e6bdd37SStefan Haberland sector_t curr_trk; 32795e6bdd37SStefan Haberland sector_t end_blk; 32805e2b17e7SJan Höppner char *dst; 32815e6bdd37SStefan Haberland int rc; 32825e2b17e7SJan Höppner 32835e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 32845e2b17e7SJan Höppner base = cqr->block->base; 32855e2b17e7SJan Höppner blksize = base->block->bp_block; 32865e6bdd37SStefan Haberland block = cqr->block; 32875e6bdd37SStefan Haberland private = base->private; 32885e6bdd37SStefan Haberland skip_block = 0; 32895e6bdd37SStefan Haberland blk_count = 0; 32905e6bdd37SStefan Haberland 32915e6bdd37SStefan Haberland recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32925e6bdd37SStefan Haberland first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 32935e6bdd37SStefan Haberland sector_div(first_trk, recs_per_trk); 32945e6bdd37SStefan Haberland last_trk = last_blk = 32955e6bdd37SStefan Haberland (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 32965e6bdd37SStefan Haberland sector_div(last_trk, recs_per_trk); 32975e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 32985e6bdd37SStefan Haberland if (rc) 32995e6bdd37SStefan Haberland return rc; 33005e6bdd37SStefan Haberland 33015e6bdd37SStefan Haberland /* sanity check if the current track from sense data is valid */ 33025e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 33035e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, base, 33045e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 33055e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 33065e6bdd37SStefan Haberland return -EINVAL; 33075e6bdd37SStefan Haberland } 33085e6bdd37SStefan Haberland 33095e6bdd37SStefan Haberland /* 33105e6bdd37SStefan Haberland * if not the first track got the NRF error we have to skip over valid 33115e6bdd37SStefan Haberland * blocks 33125e6bdd37SStefan Haberland */ 33135e6bdd37SStefan Haberland if (curr_trk != first_trk) 33145e6bdd37SStefan Haberland skip_block = curr_trk * recs_per_trk - first_blk; 33155e6bdd37SStefan Haberland 33165e6bdd37SStefan Haberland /* we have no information beyond the current track */ 33175e6bdd37SStefan Haberland end_blk = (curr_trk + 1) * recs_per_trk; 33185e2b17e7SJan Höppner 33195e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 3320bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 33215e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 33225e6bdd37SStefan Haberland if (first_blk + blk_count >= end_blk) { 33235e6bdd37SStefan Haberland cqr->proc_bytes = blk_count * blksize; 33245e6bdd37SStefan Haberland return 0; 33255e6bdd37SStefan Haberland } 3326cd68c48eSJan Höppner if (dst && !skip_block) 33275e2b17e7SJan Höppner memset(dst, 0, blksize); 3328cd68c48eSJan Höppner else 33295e6bdd37SStefan Haberland skip_block--; 3330cd68c48eSJan Höppner dst += blksize; 33315e6bdd37SStefan Haberland blk_count++; 33325e2b17e7SJan Höppner } 33335e2b17e7SJan Höppner } 33345e6bdd37SStefan Haberland return 0; 33355e2b17e7SJan Höppner } 33365e2b17e7SJan Höppner 33375e2b17e7SJan Höppner /* 33388fd57520SJan Höppner * Helper function to count consecutive records of a single track. 33398fd57520SJan Höppner */ 33408fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 33418fd57520SJan Höppner int max) 33428fd57520SJan Höppner { 33438fd57520SJan Höppner int head; 33448fd57520SJan Höppner int i; 33458fd57520SJan Höppner 33468fd57520SJan Höppner head = fmt_buffer[start].head; 33478fd57520SJan Höppner 33488fd57520SJan Höppner /* 33498fd57520SJan Höppner * There are 3 conditions where we stop counting: 33508fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 33518fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 33528fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 33538fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 33548fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 33558fd57520SJan Höppner * record will be 0 then) 33568fd57520SJan Höppner */ 33578fd57520SJan Höppner for (i = start; i < max; i++) { 33588fd57520SJan Höppner if (i > start) { 33598fd57520SJan Höppner if ((fmt_buffer[i].head == head && 33608fd57520SJan Höppner fmt_buffer[i].record == 1) || 33618fd57520SJan Höppner fmt_buffer[i].head != head || 33628fd57520SJan Höppner fmt_buffer[i].record == 0) 33638fd57520SJan Höppner break; 33648fd57520SJan Höppner } 33658fd57520SJan Höppner } 33668fd57520SJan Höppner 33678fd57520SJan Höppner return i - start; 33688fd57520SJan Höppner } 33698fd57520SJan Höppner 33708fd57520SJan Höppner /* 33718fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 33728fd57520SJan Höppner * record ids, and key length are compared with expected data. 33738fd57520SJan Höppner * 33748fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 33758fd57520SJan Höppner * additional information, depending on the error. 33768fd57520SJan Höppner */ 33778fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 33788fd57520SJan Höppner struct format_check_t *cdata, 33798fd57520SJan Höppner int rpt_max, int rpt_exp, 33808fd57520SJan Höppner int trk_per_cyl, int tpm) 33818fd57520SJan Höppner { 33828fd57520SJan Höppner struct ch_t geo; 33838fd57520SJan Höppner int max_entries; 33848fd57520SJan Höppner int count = 0; 33858fd57520SJan Höppner int trkcount; 33868fd57520SJan Höppner int blksize; 33878fd57520SJan Höppner int pos = 0; 33888fd57520SJan Höppner int i, j; 33898fd57520SJan Höppner int kl; 33908fd57520SJan Höppner 33918fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 33928fd57520SJan Höppner max_entries = trkcount * rpt_max; 33938fd57520SJan Höppner 33948fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 33958fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 33968fd57520SJan Höppner if (tpm) { 33978fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 33988fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 33998fd57520SJan Höppner if (pos++ > max_entries) 34008fd57520SJan Höppner break; 34018fd57520SJan Höppner } 34028fd57520SJan Höppner } else { 34038fd57520SJan Höppner if (i != cdata->expect.start_unit) 34048fd57520SJan Höppner pos += rpt_max - count; 34058fd57520SJan Höppner } 34068fd57520SJan Höppner 34078fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 34088fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 34098fd57520SJan Höppner 34108fd57520SJan Höppner /* Count and check number of records */ 34118fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 34128fd57520SJan Höppner 34138fd57520SJan Höppner if (count < rpt_exp) { 34148fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 34158fd57520SJan Höppner break; 34168fd57520SJan Höppner } 34178fd57520SJan Höppner if (count > rpt_exp) { 34188fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 34198fd57520SJan Höppner break; 34208fd57520SJan Höppner } 34218fd57520SJan Höppner 34228fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 34238fd57520SJan Höppner blksize = cdata->expect.blksize; 34248fd57520SJan Höppner kl = 0; 34258fd57520SJan Höppner 34268fd57520SJan Höppner /* 34278fd57520SJan Höppner * Set special values when checking CDL formatted 34288fd57520SJan Höppner * devices. 34298fd57520SJan Höppner */ 34308fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 34318fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 34328fd57520SJan Höppner if (j < 3) { 34338fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 34348fd57520SJan Höppner kl = 4; 34358fd57520SJan Höppner } 34368fd57520SJan Höppner } 34378fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 34388fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 34398fd57520SJan Höppner blksize = LABEL_SIZE - 44; 34408fd57520SJan Höppner kl = 44; 34418fd57520SJan Höppner } 34428fd57520SJan Höppner 34438fd57520SJan Höppner /* Check blocksize */ 34448fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 34458fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 34468fd57520SJan Höppner goto out; 34478fd57520SJan Höppner } 34488fd57520SJan Höppner /* Check if key length is 0 */ 34498fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 34508fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 34518fd57520SJan Höppner goto out; 34528fd57520SJan Höppner } 34538fd57520SJan Höppner /* Check if record_id is correct */ 34548fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 34558fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 34568fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 34578fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 34588fd57520SJan Höppner goto out; 34598fd57520SJan Höppner } 34608fd57520SJan Höppner } 34618fd57520SJan Höppner } 34628fd57520SJan Höppner 34638fd57520SJan Höppner out: 34648fd57520SJan Höppner /* 34658fd57520SJan Höppner * In case of no errors, we need to decrease by one 34668fd57520SJan Höppner * to get the correct positions. 34678fd57520SJan Höppner */ 34688fd57520SJan Höppner if (!cdata->result) { 34698fd57520SJan Höppner i--; 34708fd57520SJan Höppner pos--; 34718fd57520SJan Höppner } 34728fd57520SJan Höppner 34738fd57520SJan Höppner cdata->unit = i; 34748fd57520SJan Höppner cdata->num_records = count; 34758fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 34768fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 34778fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 34788fd57520SJan Höppner } 34798fd57520SJan Höppner 34808fd57520SJan Höppner /* 34818fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 34828fd57520SJan Höppner */ 34838fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 34848fd57520SJan Höppner struct format_check_t *cdata, 34858fd57520SJan Höppner int enable_pav) 34868fd57520SJan Höppner { 34878fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 34888fd57520SJan Höppner struct eckd_count *fmt_buffer; 34898fd57520SJan Höppner struct irb irb; 34908fd57520SJan Höppner int rpt_max, rpt_exp; 34918fd57520SJan Höppner int fmt_buffer_size; 34928fd57520SJan Höppner int trk_per_cyl; 34938fd57520SJan Höppner int trkcount; 34948fd57520SJan Höppner int tpm = 0; 34958fd57520SJan Höppner int rc; 34968fd57520SJan Höppner 34978fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 34988fd57520SJan Höppner 34998fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 35008fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 35018fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 35028fd57520SJan Höppner 35038fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 35048fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 35058fd57520SJan Höppner 35068fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 35078fd57520SJan Höppner if (!fmt_buffer) 35088fd57520SJan Höppner return -ENOMEM; 35098fd57520SJan Höppner 35108fd57520SJan Höppner /* 35118fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 35128fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 35138fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 35148fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 35158fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 35168fd57520SJan Höppner * processed using command mode. 35178fd57520SJan Höppner */ 35188fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 35198fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 35208fd57520SJan Höppner tpm = 1; 35218fd57520SJan Höppner 35228fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 35238fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 35248fd57520SJan Höppner if (rc && rc != -EIO) 35258fd57520SJan Höppner goto out; 35268fd57520SJan Höppner if (rc == -EIO) { 35278fd57520SJan Höppner /* 35288fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 35298fd57520SJan Höppner * with an incorrect length error, we're going to retry the 35308fd57520SJan Höppner * check with command mode. 35318fd57520SJan Höppner */ 35328fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 35338fd57520SJan Höppner tpm = 0; 35348fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 35358fd57520SJan Höppner enable_pav, tpm, 35368fd57520SJan Höppner fmt_buffer, rpt_max, 35378fd57520SJan Höppner &irb); 35388fd57520SJan Höppner if (rc) 35398fd57520SJan Höppner goto out; 35408fd57520SJan Höppner } else { 35418fd57520SJan Höppner goto out; 35428fd57520SJan Höppner } 35438fd57520SJan Höppner } 35448fd57520SJan Höppner 35458fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 35468fd57520SJan Höppner trk_per_cyl, tpm); 35478fd57520SJan Höppner 35488fd57520SJan Höppner out: 35498fd57520SJan Höppner kfree(fmt_buffer); 35508fd57520SJan Höppner 35518fd57520SJan Höppner return rc; 3552570d237cSJan Höppner } 3553570d237cSJan Höppner 35548e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 35551da177e4SLinus Torvalds { 3556a2ace466SHannes Reinecke if (cqr->retries < 0) { 3557a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3558a2ace466SHannes Reinecke return; 3559a2ace466SHannes Reinecke } 35608e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 35618e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 35628e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 35638e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3564c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 35651da177e4SLinus Torvalds } 35668e09f215SStefan Weinhuber }; 35671da177e4SLinus Torvalds 35681da177e4SLinus Torvalds static dasd_erp_fn_t 35691da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 35701da177e4SLinus Torvalds { 35718e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 35721da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 35731da177e4SLinus Torvalds 35741da177e4SLinus Torvalds switch (cdev->id.cu_type) { 35751da177e4SLinus Torvalds case 0x3990: 35761da177e4SLinus Torvalds case 0x2105: 35771da177e4SLinus Torvalds case 0x2107: 35781da177e4SLinus Torvalds case 0x1750: 35791da177e4SLinus Torvalds return dasd_3990_erp_action; 35801da177e4SLinus Torvalds case 0x9343: 35811da177e4SLinus Torvalds case 0x3880: 35821da177e4SLinus Torvalds default: 35831da177e4SLinus Torvalds return dasd_default_erp_action; 35841da177e4SLinus Torvalds } 35851da177e4SLinus Torvalds } 35861da177e4SLinus Torvalds 35871da177e4SLinus Torvalds static dasd_erp_fn_t 35881da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 35891da177e4SLinus Torvalds { 35901da177e4SLinus Torvalds return dasd_default_erp_postaction; 35911da177e4SLinus Torvalds } 35921da177e4SLinus Torvalds 35935a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 35945a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 35958e09f215SStefan Weinhuber struct irb *irb) 35968e09f215SStefan Weinhuber { 35978e09f215SStefan Weinhuber char mask; 3598f3eb5384SStefan Weinhuber char *sense = NULL; 3599543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 36008e09f215SStefan Weinhuber 36018e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 36028e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3603f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3604c8d1c0ffSStefan Haberland /* 3605c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3606c8d1c0ffSStefan Haberland * and only if not suspended 3607c8d1c0ffSStefan Haberland */ 3608501183f2SStefan Haberland if (!device->block && private->lcu && 360925e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3610c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3611c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3612501183f2SStefan Haberland /* schedule worker to reload device */ 3613501183f2SStefan Haberland dasd_reload_device(device); 3614501183f2SStefan Haberland } 36158e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 36168e09f215SStefan Weinhuber return; 36178e09f215SStefan Weinhuber } 36188e09f215SStefan Weinhuber 3619a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 36205a27e60dSStefan Weinhuber if (!sense) 36215a27e60dSStefan Weinhuber return; 36225a27e60dSStefan Weinhuber 36235a27e60dSStefan Weinhuber /* summary unit check */ 3624c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3625a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 362659a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 362759a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 362859a9ed5fSStefan Haberland "eckd suc: device already notified"); 362959a9ed5fSStefan Haberland return; 363059a9ed5fSStefan Haberland } 363159a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 363259a9ed5fSStefan Haberland if (!sense) { 363359a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 363459a9ed5fSStefan Haberland "eckd suc: no reason code available"); 363559a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 363659a9ed5fSStefan Haberland return; 363759a9ed5fSStefan Haberland 363859a9ed5fSStefan Haberland } 363959a9ed5fSStefan Haberland private->suc_reason = sense[8]; 364059a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 364159a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 364259a9ed5fSStefan Haberland private->suc_reason); 364359a9ed5fSStefan Haberland dasd_get_device(device); 364459a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 364559a9ed5fSStefan Haberland dasd_put_device(device); 364659a9ed5fSStefan Haberland 36478e09f215SStefan Weinhuber return; 36488e09f215SStefan Weinhuber } 36498e09f215SStefan Weinhuber 3650f60c768cSStefan Haberland /* service information message SIM */ 36515a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3652f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3653f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3654f60c768cSStefan Haberland return; 3655f60c768cSStefan Haberland } 3656f60c768cSStefan Haberland 36575a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 36585a27e60dSStefan Weinhuber * as alias devices may be used with several bases 36595a27e60dSStefan Weinhuber */ 3660c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3661c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 36625a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 36635a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 36645a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 36655a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 36665a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36675a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 36685a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3669ada3df91SStefan Haberland } 36705a27e60dSStefan Weinhuber } 3671f3eb5384SStefan Weinhuber 367291dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 367391dc4a19SJan Höppner unsigned int first_trk, 367491dc4a19SJan Höppner unsigned int last_trk) 367591dc4a19SJan Höppner { 367691dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 367791dc4a19SJan Höppner unsigned int trks_per_vol; 367891dc4a19SJan Höppner int rc = 0; 367991dc4a19SJan Höppner 368091dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 368191dc4a19SJan Höppner 368291dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 368391dc4a19SJan Höppner dev_warn(&device->cdev->dev, 368491dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 368591dc4a19SJan Höppner first_trk); 368691dc4a19SJan Höppner rc = -EINVAL; 368791dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 368891dc4a19SJan Höppner dev_warn(&device->cdev->dev, 368991dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 369091dc4a19SJan Höppner last_trk); 369191dc4a19SJan Höppner rc = -EINVAL; 369291dc4a19SJan Höppner } else if (first_trk > last_trk) { 369391dc4a19SJan Höppner dev_warn(&device->cdev->dev, 369491dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 369591dc4a19SJan Höppner first_trk); 369691dc4a19SJan Höppner rc = -EINVAL; 369791dc4a19SJan Höppner } 369891dc4a19SJan Höppner return rc; 369991dc4a19SJan Höppner } 370091dc4a19SJan Höppner 370191dc4a19SJan Höppner /* 370291dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 370391dc4a19SJan Höppner * with extent alignment in mind. 370491dc4a19SJan Höppner */ 370591dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 370691dc4a19SJan Höppner { 370791dc4a19SJan Höppner int cur_pos = 0; 370891dc4a19SJan Höppner int count = 0; 370991dc4a19SJan Höppner int tmp; 371091dc4a19SJan Höppner 371191dc4a19SJan Höppner if (from == to) 371291dc4a19SJan Höppner return 1; 371391dc4a19SJan Höppner 371491dc4a19SJan Höppner /* Count first partial extent */ 371591dc4a19SJan Höppner if (from % trks_per_ext != 0) { 371691dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 371791dc4a19SJan Höppner if (tmp > to) 371891dc4a19SJan Höppner tmp = to; 371991dc4a19SJan Höppner cur_pos = tmp - from + 1; 372091dc4a19SJan Höppner count++; 372191dc4a19SJan Höppner } 372291dc4a19SJan Höppner /* Count full extents */ 372391dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 372491dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 372591dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 372691dc4a19SJan Höppner cur_pos = tmp; 372791dc4a19SJan Höppner } 372891dc4a19SJan Höppner /* Count last partial extent */ 372991dc4a19SJan Höppner if (cur_pos < to) 373091dc4a19SJan Höppner count++; 373191dc4a19SJan Höppner 373291dc4a19SJan Höppner return count; 373391dc4a19SJan Höppner } 373491dc4a19SJan Höppner 373591dc4a19SJan Höppner /* 373691dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 373791dc4a19SJan Höppner */ 373891dc4a19SJan Höppner static struct dasd_ccw_req * 373991dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 374091dc4a19SJan Höppner struct request *req, unsigned int first_trk, 374191dc4a19SJan Höppner unsigned int last_trk, int by_extent) 374291dc4a19SJan Höppner { 374391dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 374491dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 374591dc4a19SJan Höppner struct dasd_rssd_features *features; 374691dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 374791dc4a19SJan Höppner u16 heads, beg_head, end_head; 374891dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 374991dc4a19SJan Höppner struct dasd_ccw_req *cqr; 375091dc4a19SJan Höppner u32 beg_cyl, end_cyl; 375191dc4a19SJan Höppner struct ccw1 *ccw; 375291dc4a19SJan Höppner int trks_per_ext; 375391dc4a19SJan Höppner size_t ras_size; 375491dc4a19SJan Höppner size_t size; 375591dc4a19SJan Höppner int nr_exts; 375691dc4a19SJan Höppner void *rq; 375791dc4a19SJan Höppner int i; 375891dc4a19SJan Höppner 375991dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 376091dc4a19SJan Höppner return ERR_PTR(-EINVAL); 376191dc4a19SJan Höppner 376291dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 376391dc4a19SJan Höppner 376491dc4a19SJan Höppner features = &private->features; 376591dc4a19SJan Höppner 376691dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 376791dc4a19SJan Höppner nr_exts = 0; 376891dc4a19SJan Höppner if (by_extent) 376991dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 377091dc4a19SJan Höppner ras_size = sizeof(*ras_data); 377191dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 377291dc4a19SJan Höppner 377391dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 377491dc4a19SJan Höppner if (IS_ERR(cqr)) { 377591dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 377691dc4a19SJan Höppner "Could not allocate RAS request"); 377791dc4a19SJan Höppner return cqr; 377891dc4a19SJan Höppner } 377991dc4a19SJan Höppner 378091dc4a19SJan Höppner ras_data = cqr->data; 378191dc4a19SJan Höppner memset(ras_data, 0, size); 378291dc4a19SJan Höppner 378391dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 378491dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 378591dc4a19SJan Höppner /* Release specified extents or entire volume */ 378691dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 378791dc4a19SJan Höppner /* 378891dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 378991dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 379091dc4a19SJan Höppner * subset. 379191dc4a19SJan Höppner */ 379291dc4a19SJan Höppner ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 3793542e30ceSStefan Haberland ras_data->lss = private->conf.ned->ID; 3794542e30ceSStefan Haberland ras_data->dev_addr = private->conf.ned->unit_addr; 379591dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 379691dc4a19SJan Höppner 379791dc4a19SJan Höppner if (by_extent) { 379891dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 379991dc4a19SJan Höppner cur_from_trk = first_trk; 380091dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 380191dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 380291dc4a19SJan Höppner if (cur_to_trk > last_trk) 380391dc4a19SJan Höppner cur_to_trk = last_trk; 380491dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 380591dc4a19SJan Höppner 380691dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 380791dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 380891dc4a19SJan Höppner beg_head = cur_from_trk % heads; 380991dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 381091dc4a19SJan Höppner end_head = cur_to_trk % heads; 381191dc4a19SJan Höppner 381291dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 381391dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 381491dc4a19SJan Höppner 381591dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 381691dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 381791dc4a19SJan Höppner if (cur_to_trk > last_trk) 381891dc4a19SJan Höppner cur_to_trk = last_trk; 381991dc4a19SJan Höppner ras_range++; 382091dc4a19SJan Höppner } 382191dc4a19SJan Höppner } 382291dc4a19SJan Höppner 382391dc4a19SJan Höppner ccw = cqr->cpaddr; 382491dc4a19SJan Höppner ccw->cda = (__u32)(addr_t)cqr->data; 382591dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 382691dc4a19SJan Höppner ccw->count = size; 382791dc4a19SJan Höppner 382891dc4a19SJan Höppner cqr->startdev = device; 382991dc4a19SJan Höppner cqr->memdev = device; 383091dc4a19SJan Höppner cqr->block = block; 383191dc4a19SJan Höppner cqr->retries = 256; 383291dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 383391dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 383491dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 383591dc4a19SJan Höppner 383691dc4a19SJan Höppner return cqr; 383791dc4a19SJan Höppner } 383891dc4a19SJan Höppner 383991dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 384091dc4a19SJan Höppner { 384191dc4a19SJan Höppner struct dasd_ccw_req *cqr; 384291dc4a19SJan Höppner int rc; 384391dc4a19SJan Höppner 384491dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 384591dc4a19SJan Höppner if (IS_ERR(cqr)) 384691dc4a19SJan Höppner return PTR_ERR(cqr); 384791dc4a19SJan Höppner 384891dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 384991dc4a19SJan Höppner 385091dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 385191dc4a19SJan Höppner 385291dc4a19SJan Höppner return rc; 385391dc4a19SJan Höppner } 385491dc4a19SJan Höppner 385591dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 385691dc4a19SJan Höppner unsigned int from, unsigned int to) 385791dc4a19SJan Höppner { 385891dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 385991dc4a19SJan Höppner struct dasd_block *block = device->block; 386091dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 386191dc4a19SJan Höppner struct list_head ras_queue; 386291dc4a19SJan Höppner unsigned int device_exts; 386391dc4a19SJan Höppner int trks_per_ext; 386491dc4a19SJan Höppner int stop, step; 386591dc4a19SJan Höppner int cur_pos; 386691dc4a19SJan Höppner int rc = 0; 386791dc4a19SJan Höppner int retry; 386891dc4a19SJan Höppner 386991dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 387091dc4a19SJan Höppner 387191dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 387291dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 387391dc4a19SJan Höppner 387491dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 387591dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 387691dc4a19SJan Höppner cur_pos = from; 387791dc4a19SJan Höppner 387891dc4a19SJan Höppner do { 387991dc4a19SJan Höppner retry = 0; 388091dc4a19SJan Höppner while (cur_pos < to) { 388191dc4a19SJan Höppner stop = cur_pos + step - 388291dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 388391dc4a19SJan Höppner if (stop > to) 388491dc4a19SJan Höppner stop = to; 388591dc4a19SJan Höppner 388691dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 388791dc4a19SJan Höppner if (IS_ERR(cqr)) { 388891dc4a19SJan Höppner rc = PTR_ERR(cqr); 388991dc4a19SJan Höppner if (rc == -ENOMEM) { 389091dc4a19SJan Höppner if (list_empty(&ras_queue)) 389191dc4a19SJan Höppner goto out; 389291dc4a19SJan Höppner retry = 1; 389391dc4a19SJan Höppner break; 389491dc4a19SJan Höppner } 389591dc4a19SJan Höppner goto err_out; 389691dc4a19SJan Höppner } 389791dc4a19SJan Höppner 389891dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 389991dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 390091dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 390191dc4a19SJan Höppner cur_pos = stop + 1; 390291dc4a19SJan Höppner } 390391dc4a19SJan Höppner 390491dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 390591dc4a19SJan Höppner 390691dc4a19SJan Höppner err_out: 390791dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 390891dc4a19SJan Höppner device = cqr->startdev; 390991dc4a19SJan Höppner private = device->private; 391091dc4a19SJan Höppner 391191dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 391291dc4a19SJan Höppner list_del_init(&cqr->blocklist); 391391dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 391491dc4a19SJan Höppner dasd_sfree_request(cqr, device); 391591dc4a19SJan Höppner private->count--; 391691dc4a19SJan Höppner } 391791dc4a19SJan Höppner } while (retry); 391891dc4a19SJan Höppner 391991dc4a19SJan Höppner out: 392091dc4a19SJan Höppner return rc; 392191dc4a19SJan Höppner } 392291dc4a19SJan Höppner 392391dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 392491dc4a19SJan Höppner struct format_data_t *rdata) 392591dc4a19SJan Höppner { 392691dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 392791dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 392891dc4a19SJan Höppner else if (rdata->intensity == 0) 392991dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 393091dc4a19SJan Höppner rdata->stop_unit); 393191dc4a19SJan Höppner else 393291dc4a19SJan Höppner return -EINVAL; 393391dc4a19SJan Höppner } 393491dc4a19SJan Höppner 3935f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3936f3eb5384SStefan Weinhuber struct dasd_device *startdev, 39378e09f215SStefan Weinhuber struct dasd_block *block, 3938f3eb5384SStefan Weinhuber struct request *req, 3939f3eb5384SStefan Weinhuber sector_t first_rec, 3940f3eb5384SStefan Weinhuber sector_t last_rec, 3941f3eb5384SStefan Weinhuber sector_t first_trk, 3942f3eb5384SStefan Weinhuber sector_t last_trk, 3943f3eb5384SStefan Weinhuber unsigned int first_offs, 3944f3eb5384SStefan Weinhuber unsigned int last_offs, 3945f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3946f3eb5384SStefan Weinhuber unsigned int blksize) 39471da177e4SLinus Torvalds { 39481da177e4SLinus Torvalds struct dasd_eckd_private *private; 39491da177e4SLinus Torvalds unsigned long *idaws; 39501da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 39511da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 39521da177e4SLinus Torvalds struct ccw1 *ccw; 39535705f702SNeilBrown struct req_iterator iter; 39547988613bSKent Overstreet struct bio_vec bv; 39551da177e4SLinus Torvalds char *dst; 3956f3eb5384SStefan Weinhuber unsigned int off; 39571da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3958f3eb5384SStefan Weinhuber sector_t recid; 39591da177e4SLinus Torvalds unsigned char cmd, rcmd; 39608e09f215SStefan Weinhuber int use_prefix; 39618e09f215SStefan Weinhuber struct dasd_device *basedev; 39621da177e4SLinus Torvalds 39638e09f215SStefan Weinhuber basedev = block->base; 3964543691a4SSebastian Ott private = basedev->private; 39651da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39661da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 39671da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 39681da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 39691da177e4SLinus Torvalds else 39701da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3971f3eb5384SStefan Weinhuber 39721da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 39731da177e4SLinus Torvalds count = 0; 39741da177e4SLinus Torvalds cidaw = 0; 39755705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39767988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 39771da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 39781da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 39797988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 39807988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 39817988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 39821da177e4SLinus Torvalds } 39831da177e4SLinus Torvalds /* Paranoia. */ 39841da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 39851da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 39868e09f215SStefan Weinhuber 39878e09f215SStefan Weinhuber /* use the prefix command if available */ 39888e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 39898e09f215SStefan Weinhuber if (use_prefix) { 39908e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 39918e09f215SStefan Weinhuber cplength = 2 + count; 39928e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 39938e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 39948e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 39958e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 39968e09f215SStefan Weinhuber } else { 39971da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 39981da177e4SLinus Torvalds cplength = 2 + count; 39991da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 40008e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 40018e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 40021da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 40038e09f215SStefan Weinhuber } 40041da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 40051da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 40061da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 40071da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 40081da177e4SLinus Torvalds cplength += count; 40091da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 40101da177e4SLinus Torvalds } 40111da177e4SLinus Torvalds /* Allocate the ccw request. */ 401268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4013c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 40141da177e4SLinus Torvalds if (IS_ERR(cqr)) 40151da177e4SLinus Torvalds return cqr; 40161da177e4SLinus Torvalds ccw = cqr->cpaddr; 40178e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 40188e09f215SStefan Weinhuber if (use_prefix) { 40198e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 40208e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 40218e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 40228e09f215SStefan Weinhuber * Try again later. 40238e09f215SStefan Weinhuber */ 40248e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4025d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 4026d54853efSMartin Schwidefsky } 40278e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 40288e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 40298e09f215SStefan Weinhuber } else { 40308e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 403145f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 40328e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 40338e09f215SStefan Weinhuber * Try again later. 40348e09f215SStefan Weinhuber */ 40358e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 40368e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 40378e09f215SStefan Weinhuber } 40388e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 40398e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 40408e09f215SStefan Weinhuber } 40411da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 40421da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 40431da177e4SLinus Torvalds recid = first_rec; 40441da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 40451da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 40461da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40471da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 40488e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 40491da177e4SLinus Torvalds } 40505705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4051bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 40521da177e4SLinus Torvalds if (dasd_page_cache) { 40531da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 4054441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 40551da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 40567988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 40571da177e4SLinus Torvalds if (copy) 40587988613bSKent Overstreet dst = copy + bv.bv_offset; 40591da177e4SLinus Torvalds } 40607988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 40611da177e4SLinus Torvalds sector_t trkid = recid; 40621da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 40631da177e4SLinus Torvalds rcmd = cmd; 40641da177e4SLinus Torvalds count = blksize; 40651da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 40661da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 40671da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 40681da177e4SLinus Torvalds rcmd |= 0x8; 40691da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 4070ec5883abSHorst Hummel if (count < blksize && 4071ec5883abSHorst Hummel rq_data_dir(req) == READ) 40721da177e4SLinus Torvalds memset(dst + count, 0xe5, 40731da177e4SLinus Torvalds blksize - count); 40741da177e4SLinus Torvalds } 40751da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40761da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 40771da177e4SLinus Torvalds trkid, recoffs + 1, 40788e09f215SStefan Weinhuber 1, rcmd, basedev, count); 40791da177e4SLinus Torvalds } 40801da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 40811da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 40821da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40831da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 40841da177e4SLinus Torvalds trkid, recoffs + 1, 40851da177e4SLinus Torvalds last_rec - recid + 1, 40868e09f215SStefan Weinhuber cmd, basedev, count); 40871da177e4SLinus Torvalds } 40881da177e4SLinus Torvalds /* Read/write ccw. */ 40891da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40901da177e4SLinus Torvalds ccw->cmd_code = rcmd; 40911da177e4SLinus Torvalds ccw->count = count; 40921da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 40931da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 40941da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 40951da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 40961da177e4SLinus Torvalds } else { 40971da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 40981da177e4SLinus Torvalds ccw->flags = 0; 40991da177e4SLinus Torvalds } 41001da177e4SLinus Torvalds ccw++; 41011da177e4SLinus Torvalds dst += blksize; 41021da177e4SLinus Torvalds recid++; 41031da177e4SLinus Torvalds } 41041da177e4SLinus Torvalds } 410513de227bSHolger Smolinski if (blk_noretry_request(req) || 410613de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 41071c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 41088e09f215SStefan Weinhuber cqr->startdev = startdev; 41098e09f215SStefan Weinhuber cqr->memdev = startdev; 41108e09f215SStefan Weinhuber cqr->block = block; 41117c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4112c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 41131f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 41141aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41151da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41165e2b17e7SJan Höppner 41175e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 41185e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 41195e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 41205e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 41215e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 41225e2b17e7SJan Höppner } 41235e2b17e7SJan Höppner 41241da177e4SLinus Torvalds return cqr; 41251da177e4SLinus Torvalds } 41261da177e4SLinus Torvalds 4127f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4128f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4129f3eb5384SStefan Weinhuber struct dasd_block *block, 4130f3eb5384SStefan Weinhuber struct request *req, 4131f3eb5384SStefan Weinhuber sector_t first_rec, 4132f3eb5384SStefan Weinhuber sector_t last_rec, 4133f3eb5384SStefan Weinhuber sector_t first_trk, 4134f3eb5384SStefan Weinhuber sector_t last_trk, 4135f3eb5384SStefan Weinhuber unsigned int first_offs, 4136f3eb5384SStefan Weinhuber unsigned int last_offs, 4137f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4138f3eb5384SStefan Weinhuber unsigned int blksize) 4139f3eb5384SStefan Weinhuber { 4140f3eb5384SStefan Weinhuber unsigned long *idaws; 4141f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4142f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4143f3eb5384SStefan Weinhuber struct req_iterator iter; 41447988613bSKent Overstreet struct bio_vec bv; 4145f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 4146f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 4147f3eb5384SStefan Weinhuber unsigned int tlf; 4148f3eb5384SStefan Weinhuber sector_t recid; 4149f3eb5384SStefan Weinhuber unsigned char cmd; 4150f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4151f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 4152f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4153f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 4154f3eb5384SStefan Weinhuber sector_t trkid; 4155f3eb5384SStefan Weinhuber unsigned int recoffs; 4156f3eb5384SStefan Weinhuber 4157f3eb5384SStefan Weinhuber basedev = block->base; 4158f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 4159f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4160f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 4161f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4162f3eb5384SStefan Weinhuber else 4163f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4164f3eb5384SStefan Weinhuber 4165f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 4166f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 4167f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 4168f3eb5384SStefan Weinhuber * of records as upper limit. 4169f3eb5384SStefan Weinhuber */ 4170f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 4171f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4172f3eb5384SStefan Weinhuber 4173f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 4174f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 4175f3eb5384SStefan Weinhuber 41767bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4177f3eb5384SStefan Weinhuber 4178f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 417968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4180c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 4181f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4182f3eb5384SStefan Weinhuber return cqr; 4183f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4184f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4185f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4186f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4187f3eb5384SStefan Weinhuber else 4188f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4189f3eb5384SStefan Weinhuber tlf *= blksize; 4190f3eb5384SStefan Weinhuber 4191f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 4192f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 4193f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 4194f3eb5384SStefan Weinhuber trkcount, blksize, 4195f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 4196f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4197f3eb5384SStefan Weinhuber * Try again later. 4198f3eb5384SStefan Weinhuber */ 4199f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4200f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 4201f3eb5384SStefan Weinhuber } 4202f3eb5384SStefan Weinhuber 4203f3eb5384SStefan Weinhuber /* 4204f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 4205f3eb5384SStefan Weinhuber * following conditions: 4206f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 4207f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 4208f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 4209f3eb5384SStefan Weinhuber */ 4210f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 4211f3eb5384SStefan Weinhuber recid = first_rec; 4212f3eb5384SStefan Weinhuber new_track = 1; 4213f3eb5384SStefan Weinhuber end_idaw = 0; 4214f3eb5384SStefan Weinhuber len_to_track_end = 0; 4215246ccea1SMartin Schwidefsky idaw_dst = NULL; 4216f3eb5384SStefan Weinhuber idaw_len = 0; 4217f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4218bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 42197988613bSKent Overstreet seg_len = bv.bv_len; 4220f3eb5384SStefan Weinhuber while (seg_len) { 4221f3eb5384SStefan Weinhuber if (new_track) { 4222f3eb5384SStefan Weinhuber trkid = recid; 4223f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 4224f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 4225f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 4226f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 4227f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 4228f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4229f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 4230f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 4231f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4232f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 4233f3eb5384SStefan Weinhuber ccw++; 4234f3eb5384SStefan Weinhuber recid += count; 4235f3eb5384SStefan Weinhuber new_track = 0; 423652db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 423752db45c3SStefan Weinhuber if (!idaw_dst) 423852db45c3SStefan Weinhuber idaw_dst = dst; 4239f3eb5384SStefan Weinhuber } 424052db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 424152db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 4242f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 4243f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 4244f3eb5384SStefan Weinhuber * idaw ends 4245f3eb5384SStefan Weinhuber */ 424652db45c3SStefan Weinhuber if (!idaw_dst) { 424752db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 424852db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 424952db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 425052db45c3SStefan Weinhuber } else 4251f3eb5384SStefan Weinhuber idaw_dst = dst; 425252db45c3SStefan Weinhuber } 4253f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 4254f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4255f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 4256f3eb5384SStefan Weinhuber } 4257f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4258f3eb5384SStefan Weinhuber seg_len -= part_len; 4259f3eb5384SStefan Weinhuber dst += part_len; 4260f3eb5384SStefan Weinhuber idaw_len += part_len; 4261f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 4262f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 4263f3eb5384SStefan Weinhuber * -> create an idaw 4264f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 4265f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 4266f3eb5384SStefan Weinhuber */ 4267f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4268f3eb5384SStefan Weinhuber end_idaw = 1; 4269f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 4270f3eb5384SStefan Weinhuber if (!len_to_track_end) { 4271f3eb5384SStefan Weinhuber new_track = 1; 4272f3eb5384SStefan Weinhuber end_idaw = 1; 4273f3eb5384SStefan Weinhuber } 4274f3eb5384SStefan Weinhuber if (end_idaw) { 4275f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 4276f3eb5384SStefan Weinhuber idaw_len); 4277246ccea1SMartin Schwidefsky idaw_dst = NULL; 4278f3eb5384SStefan Weinhuber idaw_len = 0; 4279f3eb5384SStefan Weinhuber end_idaw = 0; 4280f3eb5384SStefan Weinhuber } 4281f3eb5384SStefan Weinhuber } 4282f3eb5384SStefan Weinhuber } 4283f3eb5384SStefan Weinhuber 4284f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4285f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4286f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4287f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4288f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4289f3eb5384SStefan Weinhuber cqr->block = block; 42907c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4291c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 42921f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 42931aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4294f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 42955e2b17e7SJan Höppner 42965e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 42975e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 42985e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 42995e2b17e7SJan Höppner 4300f3eb5384SStefan Weinhuber return cqr; 4301f3eb5384SStefan Weinhuber } 4302f3eb5384SStefan Weinhuber 4303f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4304f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4305f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4306f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4307f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4308f3eb5384SStefan Weinhuber unsigned int blksize, 4309f3eb5384SStefan Weinhuber unsigned int total_data_size, 4310f3eb5384SStefan Weinhuber unsigned int tlf, 4311f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4312f3eb5384SStefan Weinhuber { 4313f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4314f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4315f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4316f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4317f3eb5384SStefan Weinhuber struct dcw *dcw; 4318f3eb5384SStefan Weinhuber 4319f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4320f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4321f3eb5384SStefan Weinhuber u8 pfx_cmd; 4322f3eb5384SStefan Weinhuber 4323f3eb5384SStefan Weinhuber int rc = 0; 4324f3eb5384SStefan Weinhuber int sector = 0; 4325f3eb5384SStefan Weinhuber int dn, d; 4326f3eb5384SStefan Weinhuber 4327f3eb5384SStefan Weinhuber 4328f3eb5384SStefan Weinhuber /* setup prefix data */ 4329543691a4SSebastian Ott basepriv = basedev->private; 4330543691a4SSebastian Ott startpriv = startdev->private; 4331f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4332f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4333f3eb5384SStefan Weinhuber 4334f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4335f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4336542e30ceSStefan Haberland pfxdata.base_address = basepriv->conf.ned->unit_addr; 4337542e30ceSStefan Haberland pfxdata.base_lss = basepriv->conf.ned->ID; 4338f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4339f3eb5384SStefan Weinhuber 4340f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4341da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4342f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4343da340f92SStefan Haberland 4344da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4345da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4346f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4347f3eb5384SStefan Weinhuber } 4348f3eb5384SStefan Weinhuber 4349f3eb5384SStefan Weinhuber switch (cmd) { 4350f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4351f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4352f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4353f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4354f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4355f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4356f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4357f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4358f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4359f3eb5384SStefan Weinhuber break; 4360f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4361f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4362f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4363f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 43645628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4365f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4366f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4367f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4368f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4369f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 437045f186beSJan Höppner /* 437145f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 437245f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 437345f186beSJan Höppner * data as well. 437445f186beSJan Höppner */ 437545f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 437645f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4377f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4378f3eb5384SStefan Weinhuber break; 43798fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 43808fd57520SJan Höppner dedata->mask.perm = 0x1; 43818fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 43828fd57520SJan Höppner dedata->ga_extended |= 0x42; 43838fd57520SJan Höppner dedata->blk_size = blksize; 43848fd57520SJan Höppner lredata->operation.orientation = 0x2; 43858fd57520SJan Höppner lredata->operation.operation = 0x16; 43868fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 43878fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 43888fd57520SJan Höppner break; 4389f3eb5384SStefan Weinhuber default: 4390f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4391f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4392f3eb5384SStefan Weinhuber BUG(); 4393f3eb5384SStefan Weinhuber break; 4394f3eb5384SStefan Weinhuber } 4395f3eb5384SStefan Weinhuber if (rc) 4396f3eb5384SStefan Weinhuber return rc; 4397f3eb5384SStefan Weinhuber 4398f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4399f3eb5384SStefan Weinhuber 4400f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4401f3eb5384SStefan Weinhuber begcyl = trk / heads; 4402f3eb5384SStefan Weinhuber beghead = trk % heads; 4403f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4404f3eb5384SStefan Weinhuber endhead = totrk % heads; 4405f3eb5384SStefan Weinhuber 4406f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4407f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4408f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4409f3eb5384SStefan Weinhuber 4410f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4411f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4412f3eb5384SStefan Weinhuber else 4413f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4414f3eb5384SStefan Weinhuber } 4415f3eb5384SStefan Weinhuber 4416f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4417f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4418f3eb5384SStefan Weinhuber 4419f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4420f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4421f3eb5384SStefan Weinhuber 4422f3eb5384SStefan Weinhuber if (rec_on_trk) { 4423f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4424f3eb5384SStefan Weinhuber case 0x3390: 4425f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4426f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4427f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4428f3eb5384SStefan Weinhuber break; 4429f3eb5384SStefan Weinhuber case 0x3380: 4430f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4431f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4432f3eb5384SStefan Weinhuber break; 4433f3eb5384SStefan Weinhuber } 4434f3eb5384SStefan Weinhuber } 4435f3eb5384SStefan Weinhuber 44368fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 44378fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 44388fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 44398fd57520SJan Höppner lredata->sector = 0xff; 44408fd57520SJan Höppner } else { 4441f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4442f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 44438fd57520SJan Höppner lredata->sector = sector; 44448fd57520SJan Höppner } 4445f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4446f3eb5384SStefan Weinhuber lredata->length = tlf; 4447f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4448f3eb5384SStefan Weinhuber lredata->count = count; 4449f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4450f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4451f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4452f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4453f3eb5384SStefan Weinhuber 4454f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4455f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4456757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4457f3eb5384SStefan Weinhuber } 4458f3eb5384SStefan Weinhuber 4459f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4460f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4461f3eb5384SStefan Weinhuber struct dasd_block *block, 4462f3eb5384SStefan Weinhuber struct request *req, 4463f3eb5384SStefan Weinhuber sector_t first_rec, 4464f3eb5384SStefan Weinhuber sector_t last_rec, 4465f3eb5384SStefan Weinhuber sector_t first_trk, 4466f3eb5384SStefan Weinhuber sector_t last_trk, 4467f3eb5384SStefan Weinhuber unsigned int first_offs, 4468f3eb5384SStefan Weinhuber unsigned int last_offs, 4469f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4470f3eb5384SStefan Weinhuber unsigned int blksize) 4471f3eb5384SStefan Weinhuber { 4472f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4473f3eb5384SStefan Weinhuber struct req_iterator iter; 44747988613bSKent Overstreet struct bio_vec bv; 4475f3eb5384SStefan Weinhuber char *dst; 4476f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4477f3eb5384SStefan Weinhuber unsigned char cmd; 4478f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4479f3eb5384SStefan Weinhuber unsigned int tlf; 4480f3eb5384SStefan Weinhuber struct itcw *itcw; 4481f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4482f3eb5384SStefan Weinhuber int itcw_op; 4483f3eb5384SStefan Weinhuber size_t itcw_size; 4484ef19298bSStefan Weinhuber u8 tidaw_flags; 4485ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4486ef19298bSStefan Weinhuber unsigned char new_track; 4487ef19298bSStefan Weinhuber sector_t recid, trkid; 4488ef19298bSStefan Weinhuber unsigned int offs; 4489ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4490cd10502bSJulia Lawall int ret; 4491f3eb5384SStefan Weinhuber 4492f3eb5384SStefan Weinhuber basedev = block->base; 4493f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4494f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4495f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4496f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4497f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4498f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4499f3eb5384SStefan Weinhuber } else 4500f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4501f3eb5384SStefan Weinhuber 4502f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4503f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4504f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4505ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4506ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4507f3eb5384SStefan Weinhuber */ 4508f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4509f3eb5384SStefan Weinhuber ctidaw = 0; 4510f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4511f3eb5384SStefan Weinhuber ++ctidaw; 4512f3eb5384SStefan Weinhuber } 4513ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4514ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4515f3eb5384SStefan Weinhuber 4516f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4517f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4518c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4519c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4520f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4521f3eb5384SStefan Weinhuber return cqr; 4522f3eb5384SStefan Weinhuber 4523f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4524f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4525f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4526f3eb5384SStefan Weinhuber else 4527f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4528f3eb5384SStefan Weinhuber tlf *= blksize; 4529f3eb5384SStefan Weinhuber 4530f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4531ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4532cd10502bSJulia Lawall ret = -EINVAL; 4533cd10502bSJulia Lawall goto out_error; 4534ef19298bSStefan Weinhuber } 4535f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4536f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4537f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4538f3eb5384SStefan Weinhuber first_offs + 1, 4539f3eb5384SStefan Weinhuber trkcount, blksize, 4540f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4541f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4542f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4543f3eb5384SStefan Weinhuber * Try again later. 4544f3eb5384SStefan Weinhuber */ 4545cd10502bSJulia Lawall ret = -EAGAIN; 4546cd10502bSJulia Lawall goto out_error; 4547f3eb5384SStefan Weinhuber } 4548d54cddb6SHeiko Carstens len_to_track_end = 0; 4549f3eb5384SStefan Weinhuber /* 4550f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4551f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4552f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4553f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4554ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4555ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4556f3eb5384SStefan Weinhuber */ 4557ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4558ef19298bSStefan Weinhuber new_track = 1; 4559ef19298bSStefan Weinhuber recid = first_rec; 4560f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4561bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 45627988613bSKent Overstreet seg_len = bv.bv_len; 4563ef19298bSStefan Weinhuber while (seg_len) { 4564ef19298bSStefan Weinhuber if (new_track) { 4565ef19298bSStefan Weinhuber trkid = recid; 4566ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4567ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4568ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4569ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4570ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4571ef19298bSStefan Weinhuber recid += count; 4572ef19298bSStefan Weinhuber new_track = 0; 4573f3eb5384SStefan Weinhuber } 4574ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4575ef19298bSStefan Weinhuber seg_len -= part_len; 4576ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4577ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4578ef19298bSStefan Weinhuber if (!len_to_track_end) { 4579ef19298bSStefan Weinhuber new_track = 1; 4580ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4581ef19298bSStefan Weinhuber } else 4582ef19298bSStefan Weinhuber tidaw_flags = 0; 4583ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4584ef19298bSStefan Weinhuber dst, part_len); 4585cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4586cd10502bSJulia Lawall ret = -EINVAL; 4587cd10502bSJulia Lawall goto out_error; 4588cd10502bSJulia Lawall } 4589ef19298bSStefan Weinhuber dst += part_len; 4590ef19298bSStefan Weinhuber } 4591ef19298bSStefan Weinhuber } 4592ef19298bSStefan Weinhuber } else { 4593ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4594bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 4595ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 45967988613bSKent Overstreet dst, bv.bv_len); 4597cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4598cd10502bSJulia Lawall ret = -EINVAL; 4599cd10502bSJulia Lawall goto out_error; 4600cd10502bSJulia Lawall } 4601ef19298bSStefan Weinhuber } 4602ef19298bSStefan Weinhuber } 4603ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4604ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4605f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4606f3eb5384SStefan Weinhuber 4607f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4608f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4609f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4610ef19298bSStefan Weinhuber cqr->cpmode = 1; 4611f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4612f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4613f3eb5384SStefan Weinhuber cqr->block = block; 46147c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4615c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 46161f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 46171aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4618f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 46195e2b17e7SJan Höppner 46205e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 46215e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 46225e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 46235e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 46245e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 46255e2b17e7SJan Höppner } 46265e2b17e7SJan Höppner 4627f3eb5384SStefan Weinhuber return cqr; 4628cd10502bSJulia Lawall out_error: 4629cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4630cd10502bSJulia Lawall return ERR_PTR(ret); 4631f3eb5384SStefan Weinhuber } 4632f3eb5384SStefan Weinhuber 4633f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4634f3eb5384SStefan Weinhuber struct dasd_block *block, 4635f3eb5384SStefan Weinhuber struct request *req) 4636f3eb5384SStefan Weinhuber { 4637ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4638f3eb5384SStefan Weinhuber int use_prefix; 4639ef19298bSStefan Weinhuber int fcx_multitrack; 464045b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4641f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4642f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4643f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4644f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4645f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4646f3eb5384SStefan Weinhuber int cdlspecial; 4647ef19298bSStefan Weinhuber unsigned int data_size; 4648f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4649f3eb5384SStefan Weinhuber 4650f3eb5384SStefan Weinhuber basedev = block->base; 4651543691a4SSebastian Ott private = basedev->private; 4652f3eb5384SStefan Weinhuber 4653f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4654f3eb5384SStefan Weinhuber blksize = block->bp_block; 4655f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 46566fca97a9SStefan Haberland if (blk_per_trk == 0) 46576fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4658f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 465983096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4660f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4661f3eb5384SStefan Weinhuber last_rec = last_trk = 466283096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4663f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4664f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4665f3eb5384SStefan Weinhuber 4666ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4667ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 466826a35f37SStefan Weinhuber if (data_size % blksize) 466926a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4670ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4671ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4672ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4673f3eb5384SStefan Weinhuber 4674f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4675f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4676f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4677f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4678f3eb5384SStefan Weinhuber 4679f3eb5384SStefan Weinhuber cqr = NULL; 4680f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4681f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4682ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4683ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4684f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4685f3eb5384SStefan Weinhuber first_rec, last_rec, 4686f3eb5384SStefan Weinhuber first_trk, last_trk, 4687f3eb5384SStefan Weinhuber first_offs, last_offs, 4688f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4689ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4690ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4691f3eb5384SStefan Weinhuber cqr = NULL; 4692f3eb5384SStefan Weinhuber } else if (use_prefix && 4693f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4694f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4695f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4696f3eb5384SStefan Weinhuber first_rec, last_rec, 4697f3eb5384SStefan Weinhuber first_trk, last_trk, 4698f3eb5384SStefan Weinhuber first_offs, last_offs, 4699f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4700ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4701ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4702f3eb5384SStefan Weinhuber cqr = NULL; 4703f3eb5384SStefan Weinhuber } 4704f3eb5384SStefan Weinhuber if (!cqr) 4705f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4706f3eb5384SStefan Weinhuber first_rec, last_rec, 4707f3eb5384SStefan Weinhuber first_trk, last_trk, 4708f3eb5384SStefan Weinhuber first_offs, last_offs, 4709f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4710f3eb5384SStefan Weinhuber return cqr; 4711f3eb5384SStefan Weinhuber } 4712f3eb5384SStefan Weinhuber 4713bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4714e4dbb0f2SStefan Haberland struct dasd_block *block, 4715e4dbb0f2SStefan Haberland struct request *req) 4716e4dbb0f2SStefan Haberland { 47179d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4718e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4719e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4720558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 47219d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 47229d2be0c1SJan Höppner struct dasd_device *basedev; 47239d2be0c1SJan Höppner struct req_iterator iter; 47249d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 47259d2be0c1SJan Höppner unsigned int trkcount; 47269d2be0c1SJan Höppner unsigned long *idaws; 47279d2be0c1SJan Höppner unsigned int size; 47289d2be0c1SJan Höppner unsigned char cmd; 47299d2be0c1SJan Höppner struct bio_vec bv; 47309d2be0c1SJan Höppner struct ccw1 *ccw; 47319d2be0c1SJan Höppner int use_prefix; 47329d2be0c1SJan Höppner void *data; 47339d2be0c1SJan Höppner char *dst; 4734e4dbb0f2SStefan Haberland 4735e4dbb0f2SStefan Haberland /* 4736e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4737558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4738558b9ef0SStefan Weinhuber * the request with dummy pages. 4739e4dbb0f2SStefan Haberland */ 4740558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4741558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4742558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4743558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4744558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4745558b9ef0SStefan Weinhuber basedev = block->base; 4746558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4747558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4748558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4749e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4750558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 47519d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4752e4dbb0f2SStefan Haberland } 4753e4dbb0f2SStefan Haberland 4754e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4755e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4756e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4757e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4758e4dbb0f2SStefan Haberland 4759e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4760e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4761e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4762e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 47639d2be0c1SJan Höppner else 47649d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4765e4dbb0f2SStefan Haberland 4766e4dbb0f2SStefan Haberland /* 4767e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4768e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4769e4dbb0f2SStefan Haberland */ 4770e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4771e4dbb0f2SStefan Haberland 4772e4dbb0f2SStefan Haberland /* 47739d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 47749d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4775e4dbb0f2SStefan Haberland */ 47769d2be0c1SJan Höppner base_priv = basedev->private; 47779d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 47789d2be0c1SJan Höppner if (use_prefix) { 47799d2be0c1SJan Höppner cplength = 1 + trkcount; 47809d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 47819d2be0c1SJan Höppner } else { 47829d2be0c1SJan Höppner cplength = 2 + trkcount; 47839d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 47849d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 47859d2be0c1SJan Höppner } 47869d2be0c1SJan Höppner size = ALIGN(size, 8); 4787e4dbb0f2SStefan Haberland 47887bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4789e4dbb0f2SStefan Haberland 4790e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4791e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4792c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4793e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 47949d2be0c1SJan Höppner return cqr; 4795e4dbb0f2SStefan Haberland 47969d2be0c1SJan Höppner ccw = cqr->cpaddr; 47979d2be0c1SJan Höppner data = cqr->data; 47989d2be0c1SJan Höppner 47999d2be0c1SJan Höppner if (use_prefix) { 48009d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 4801*590ce6d9SStefan Haberland startdev, 1, 0, trkcount, 0, 0); 48029d2be0c1SJan Höppner } else { 48039d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 48049d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 48059d2be0c1SJan Höppner 48069d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 4807*590ce6d9SStefan Haberland locate_record_ext(ccw++, data, first_trk, 0, 48089d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4809e4dbb0f2SStefan Haberland } 4810e4dbb0f2SStefan Haberland 48119d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4812e4dbb0f2SStefan Haberland len_to_track_end = 0; 4813558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4814558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4815558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4816558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4817558b9ef0SStefan Weinhuber ccw->count = 57326; 4818558b9ef0SStefan Weinhuber /* 64k map to one track */ 4819558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4820558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4821558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4822558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4823558b9ef0SStefan Weinhuber ccw++; 4824558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4825558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4826558b9ef0SStefan Weinhuber } 4827e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 4828bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 48297988613bSKent Overstreet seg_len = bv.bv_len; 4830558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4831558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4832e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4833e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4834e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4835e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4836e4dbb0f2SStefan Haberland ccw->count = 57326; 4837e4dbb0f2SStefan Haberland /* 64k map to one track */ 4838e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4839e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4840e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4841e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4842e4dbb0f2SStefan Haberland ccw++; 4843e4dbb0f2SStefan Haberland } 4844e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4845e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4846e4dbb0f2SStefan Haberland } 4847558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4848558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4849e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4850e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4851e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4852e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4853e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4854e4dbb0f2SStefan Haberland cqr->block = block; 4855e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4856c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 48571f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 48581aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4859e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4860e4dbb0f2SStefan Haberland 4861e4dbb0f2SStefan Haberland return cqr; 4862e4dbb0f2SStefan Haberland } 4863e4dbb0f2SStefan Haberland 4864e4dbb0f2SStefan Haberland 48651da177e4SLinus Torvalds static int 48661da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 48671da177e4SLinus Torvalds { 48681da177e4SLinus Torvalds struct dasd_eckd_private *private; 48691da177e4SLinus Torvalds struct ccw1 *ccw; 48705705f702SNeilBrown struct req_iterator iter; 48717988613bSKent Overstreet struct bio_vec bv; 48721da177e4SLinus Torvalds char *dst, *cda; 48731da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 48741da177e4SLinus Torvalds sector_t recid; 48755705f702SNeilBrown int status; 48761da177e4SLinus Torvalds 48771da177e4SLinus Torvalds if (!dasd_page_cache) 48781da177e4SLinus Torvalds goto out; 4879543691a4SSebastian Ott private = cqr->block->base->private; 48808e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 48811da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 488283096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 48831da177e4SLinus Torvalds ccw = cqr->cpaddr; 48841da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 48851da177e4SLinus Torvalds ccw++; 48861da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 48871da177e4SLinus Torvalds ccw++; 48885705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4889bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 48907988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 48911da177e4SLinus Torvalds /* Skip locate record. */ 48921da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 48931da177e4SLinus Torvalds ccw++; 48941da177e4SLinus Torvalds if (dst) { 48951da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 48961da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 48971da177e4SLinus Torvalds else 48981da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 48991da177e4SLinus Torvalds if (dst != cda) { 49001da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 49017988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 49021da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 49031da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 49041da177e4SLinus Torvalds } 49051da177e4SLinus Torvalds dst = NULL; 49061da177e4SLinus Torvalds } 49071da177e4SLinus Torvalds ccw++; 49081da177e4SLinus Torvalds recid++; 49091da177e4SLinus Torvalds } 49101da177e4SLinus Torvalds } 49111da177e4SLinus Torvalds out: 49121da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 49138e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 49141da177e4SLinus Torvalds return status; 49151da177e4SLinus Torvalds } 49161da177e4SLinus Torvalds 49178e09f215SStefan Weinhuber /* 4918f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 49198e09f215SStefan Weinhuber * 49208e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 49218e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 49228e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 49238e09f215SStefan Weinhuber */ 49248e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 49258e09f215SStefan Weinhuber { 49268e09f215SStefan Weinhuber struct ccw1 *ccw; 49278e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4928f3eb5384SStefan Weinhuber struct tcw *tcw; 4929f3eb5384SStefan Weinhuber struct tccb *tccb; 4930f3eb5384SStefan Weinhuber struct dcw *dcw; 49318e09f215SStefan Weinhuber 4932f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4933f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4934f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4935f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4936f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4937f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4938f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4939f3eb5384SStefan Weinhuber } else { 49408e09f215SStefan Weinhuber ccw = cqr->cpaddr; 49418e09f215SStefan Weinhuber pfxdata = cqr->data; 49428e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 49438e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 49448e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 49458e09f215SStefan Weinhuber } 49468e09f215SStefan Weinhuber } 4947f3eb5384SStefan Weinhuber } 49488e09f215SStefan Weinhuber 49498e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 49508e09f215SStefan Weinhuber 49518e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 49528e09f215SStefan Weinhuber struct dasd_block *block, 49538e09f215SStefan Weinhuber struct request *req) 49548e09f215SStefan Weinhuber { 49558e09f215SStefan Weinhuber struct dasd_eckd_private *private; 4956964ce509SStefan Haberland struct dasd_device *startdev; 49577e64db15SJan Höppner unsigned long flags; 4958964ce509SStefan Haberland struct dasd_ccw_req *cqr; 49598e09f215SStefan Weinhuber 49608e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 49618e09f215SStefan Weinhuber if (!startdev) 49628e09f215SStefan Weinhuber startdev = base; 4963543691a4SSebastian Ott private = startdev->private; 49648e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 49658e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 49668e09f215SStefan Weinhuber 49678e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 49688e09f215SStefan Weinhuber private->count++; 4969e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4970bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4971e4dbb0f2SStefan Haberland else 49728e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 49738e09f215SStefan Weinhuber if (IS_ERR(cqr)) 49748e09f215SStefan Weinhuber private->count--; 49758e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 49768e09f215SStefan Weinhuber return cqr; 49778e09f215SStefan Weinhuber } 49788e09f215SStefan Weinhuber 49798e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 49808e09f215SStefan Weinhuber struct request *req) 49818e09f215SStefan Weinhuber { 49828e09f215SStefan Weinhuber struct dasd_eckd_private *private; 49838e09f215SStefan Weinhuber unsigned long flags; 49848e09f215SStefan Weinhuber 49858e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4986543691a4SSebastian Ott private = cqr->memdev->private; 49878e09f215SStefan Weinhuber private->count--; 49888e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 49898e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 49908e09f215SStefan Weinhuber } 49918e09f215SStefan Weinhuber 49921da177e4SLinus Torvalds static int 49931da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 49941da177e4SLinus Torvalds struct dasd_information2_t * info) 49951da177e4SLinus Torvalds { 4996543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49971da177e4SLinus Torvalds 49981da177e4SLinus Torvalds info->label_block = 2; 49991da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 50001da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 5001543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 50021da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 5003543691a4SSebastian Ott sizeof(private->rdc_data)); 5004542e30ceSStefan Haberland info->confdata_size = min_t(unsigned long, private->conf.len, 50054abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 5006542e30ceSStefan Haberland memcpy(info->configuration_data, private->conf.data, 50074abb08c2SStefan Weinhuber info->confdata_size); 50081da177e4SLinus Torvalds return 0; 50091da177e4SLinus Torvalds } 50101da177e4SLinus Torvalds 50111da177e4SLinus Torvalds /* 50121da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 50131da177e4SLinus Torvalds */ 50141da177e4SLinus Torvalds 50151da177e4SLinus Torvalds /* 50161da177e4SLinus Torvalds * Release device ioctl. 50171da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 50181da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 50191da177e4SLinus Torvalds */ 50201da177e4SLinus Torvalds static int 50211107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 50221da177e4SLinus Torvalds { 50231da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50241da177e4SLinus Torvalds int rc; 5025f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5026f932bceaSStefan Weinhuber int useglobal; 50271da177e4SLinus Torvalds 50281da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50291da177e4SLinus Torvalds return -EACCES; 50301da177e4SLinus Torvalds 5031f932bceaSStefan Weinhuber useglobal = 0; 5032c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50331da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5034f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5035f932bceaSStefan Weinhuber useglobal = 1; 5036f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5037f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5038f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5039f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5040f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5041f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5042f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50431da177e4SLinus Torvalds } 5044f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5045f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 5046f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5047f3eb5384SStefan Weinhuber ccw->count = 32; 5048f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 50498e09f215SStefan Weinhuber cqr->startdev = device; 50508e09f215SStefan Weinhuber cqr->memdev = device; 50511da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50521c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5053336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50541da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50551aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50561da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50571da177e4SLinus Torvalds 50581da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50595a27e60dSStefan Weinhuber if (!rc) 50605a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50611da177e4SLinus Torvalds 5062f932bceaSStefan Weinhuber if (useglobal) 5063f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5064f932bceaSStefan Weinhuber else 50658e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50661da177e4SLinus Torvalds return rc; 50671da177e4SLinus Torvalds } 50681da177e4SLinus Torvalds 50691da177e4SLinus Torvalds /* 50701da177e4SLinus Torvalds * Reserve device ioctl. 50711da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 50721da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 50731da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 50741da177e4SLinus Torvalds */ 50751da177e4SLinus Torvalds static int 50761107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 50771da177e4SLinus Torvalds { 50781da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50791da177e4SLinus Torvalds int rc; 5080f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5081f932bceaSStefan Weinhuber int useglobal; 50821da177e4SLinus Torvalds 50831da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50841da177e4SLinus Torvalds return -EACCES; 50851da177e4SLinus Torvalds 5086f932bceaSStefan Weinhuber useglobal = 0; 5087c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50881da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5089f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5090f932bceaSStefan Weinhuber useglobal = 1; 5091f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5092f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5093f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5094f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5095f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5096f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5097f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50981da177e4SLinus Torvalds } 5099f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5100f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 5101f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5102f3eb5384SStefan Weinhuber ccw->count = 32; 5103f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 51048e09f215SStefan Weinhuber cqr->startdev = device; 51058e09f215SStefan Weinhuber cqr->memdev = device; 51061da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 51071c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5108336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 51091da177e4SLinus Torvalds cqr->expires = 2 * HZ; 51101aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 51111da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 51121da177e4SLinus Torvalds 51131da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 51145a27e60dSStefan Weinhuber if (!rc) 51155a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 51161da177e4SLinus Torvalds 5117f932bceaSStefan Weinhuber if (useglobal) 5118f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5119f932bceaSStefan Weinhuber else 51208e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 51211da177e4SLinus Torvalds return rc; 51221da177e4SLinus Torvalds } 51231da177e4SLinus Torvalds 51241da177e4SLinus Torvalds /* 51251da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 51261da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 51271da177e4SLinus Torvalds * (unconditional reserve) 51281da177e4SLinus Torvalds */ 51291da177e4SLinus Torvalds static int 51301107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 51311da177e4SLinus Torvalds { 51321da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 51331da177e4SLinus Torvalds int rc; 5134f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5135f932bceaSStefan Weinhuber int useglobal; 51361da177e4SLinus Torvalds 51371da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 51381da177e4SLinus Torvalds return -EACCES; 51391da177e4SLinus Torvalds 5140f932bceaSStefan Weinhuber useglobal = 0; 5141c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 51421da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5143f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5144f932bceaSStefan Weinhuber useglobal = 1; 5145f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5146f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5147f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5148f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5149f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5150f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5151f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 51521da177e4SLinus Torvalds } 5153f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5154f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5155f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5156f3eb5384SStefan Weinhuber ccw->count = 32; 5157f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 51588e09f215SStefan Weinhuber cqr->startdev = device; 51598e09f215SStefan Weinhuber cqr->memdev = device; 51601da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 51611c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5162336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 51631da177e4SLinus Torvalds cqr->expires = 2 * HZ; 51641aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 51651da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 51661da177e4SLinus Torvalds 51671da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 51685a27e60dSStefan Weinhuber if (!rc) 51695a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 51701da177e4SLinus Torvalds 5171f932bceaSStefan Weinhuber if (useglobal) 5172f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5173f932bceaSStefan Weinhuber else 51748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 51751da177e4SLinus Torvalds return rc; 51761da177e4SLinus Torvalds } 51771da177e4SLinus Torvalds 51781da177e4SLinus Torvalds /* 5179196339f1SStefan Weinhuber * SNID - Sense Path Group ID 5180196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 5181196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 5182196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 5183196339f1SStefan Weinhuber */ 5184196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 5185196339f1SStefan Weinhuber void __user *argp) 5186196339f1SStefan Weinhuber { 5187196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 5188196339f1SStefan Weinhuber int rc; 5189196339f1SStefan Weinhuber struct ccw1 *ccw; 5190196339f1SStefan Weinhuber int useglobal; 5191196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 5192196339f1SStefan Weinhuber 5193196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 5194196339f1SStefan Weinhuber return -EACCES; 5195196339f1SStefan Weinhuber 5196196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5197196339f1SStefan Weinhuber return -EFAULT; 5198196339f1SStefan Weinhuber 5199196339f1SStefan Weinhuber useglobal = 0; 5200196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5201c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 5202c5205f2fSSebastian Ott NULL); 5203196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 5204196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5205196339f1SStefan Weinhuber useglobal = 1; 5206196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5207196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5208196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5209196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5210196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5211196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5212196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 5213196339f1SStefan Weinhuber } 5214196339f1SStefan Weinhuber ccw = cqr->cpaddr; 5215196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 5216196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5217196339f1SStefan Weinhuber ccw->count = 12; 5218196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 5219196339f1SStefan Weinhuber cqr->startdev = device; 5220196339f1SStefan Weinhuber cqr->memdev = device; 5221196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5222196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 52235a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5224196339f1SStefan Weinhuber cqr->retries = 5; 5225196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 52261aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5227196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 5228196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 5229196339f1SStefan Weinhuber 5230196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 5231196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 5232196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5233196339f1SStefan Weinhuber rc = -EIO; 5234196339f1SStefan Weinhuber if (!rc) { 5235196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 5236196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5237196339f1SStefan Weinhuber rc = -EFAULT; 5238196339f1SStefan Weinhuber } 5239196339f1SStefan Weinhuber 5240196339f1SStefan Weinhuber if (useglobal) 5241196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5242196339f1SStefan Weinhuber else 5243196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 5244196339f1SStefan Weinhuber return rc; 5245196339f1SStefan Weinhuber } 5246196339f1SStefan Weinhuber 5247196339f1SStefan Weinhuber /* 52481da177e4SLinus Torvalds * Read performance statistics 52491da177e4SLinus Torvalds */ 52501da177e4SLinus Torvalds static int 52511107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 52521da177e4SLinus Torvalds { 52531da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 52541da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 52551da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 52561da177e4SLinus Torvalds struct ccw1 *ccw; 52571da177e4SLinus Torvalds int rc; 52581da177e4SLinus Torvalds 525968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 52601da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 52611da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 5262c5205f2fSSebastian Ott device, NULL); 52631da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5264fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 52651da177e4SLinus Torvalds "Could not allocate initialization request"); 52661da177e4SLinus Torvalds return PTR_ERR(cqr); 52671da177e4SLinus Torvalds } 52688e09f215SStefan Weinhuber cqr->startdev = device; 52698e09f215SStefan Weinhuber cqr->memdev = device; 52701da177e4SLinus Torvalds cqr->retries = 0; 5271eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 52721da177e4SLinus Torvalds cqr->expires = 10 * HZ; 52731da177e4SLinus Torvalds 52741da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 52751da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 52761da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 52771da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 52785d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 52791da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 52801da177e4SLinus Torvalds 52811da177e4SLinus Torvalds ccw = cqr->cpaddr; 52821da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 52831da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 52841da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 52851da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 52861da177e4SLinus Torvalds 52871da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 52881da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 52891da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 52901da177e4SLinus Torvalds 52911da177e4SLinus Torvalds ccw++; 52921da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 52931da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 52941da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 52951da177e4SLinus Torvalds 52961aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 52971da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 52981da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 52991da177e4SLinus Torvalds if (rc == 0) { 53001da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 53011da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 53021107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 53031107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 53041107ccfbSChristoph Hellwig rc = -EFAULT; 53051da177e4SLinus Torvalds } 53068e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 53071da177e4SLinus Torvalds return rc; 53081da177e4SLinus Torvalds } 53091da177e4SLinus Torvalds 53101da177e4SLinus Torvalds /* 53111da177e4SLinus Torvalds * Get attributes (cache operations) 53121da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 53131da177e4SLinus Torvalds */ 53141da177e4SLinus Torvalds static int 53151107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 53161da177e4SLinus Torvalds { 5317543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 53181107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 53191da177e4SLinus Torvalds int rc; 53201da177e4SLinus Torvalds 53211da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 53221da177e4SLinus Torvalds return -EACCES; 53231107ccfbSChristoph Hellwig if (!argp) 53241da177e4SLinus Torvalds return -EINVAL; 53251da177e4SLinus Torvalds 53261107ccfbSChristoph Hellwig rc = 0; 53271107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 53281107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 53291107ccfbSChristoph Hellwig rc = -EFAULT; 53301da177e4SLinus Torvalds 53311da177e4SLinus Torvalds return rc; 53321da177e4SLinus Torvalds } 53331da177e4SLinus Torvalds 53341da177e4SLinus Torvalds /* 53351da177e4SLinus Torvalds * Set attributes (cache operations) 53361da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 53371da177e4SLinus Torvalds */ 53381da177e4SLinus Torvalds static int 53391107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 53401da177e4SLinus Torvalds { 5341543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 53421da177e4SLinus Torvalds struct attrib_data_t attrib; 53431da177e4SLinus Torvalds 53441da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 53451da177e4SLinus Torvalds return -EACCES; 53461107ccfbSChristoph Hellwig if (!argp) 53471da177e4SLinus Torvalds return -EINVAL; 53481da177e4SLinus Torvalds 53491107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 53501da177e4SLinus Torvalds return -EFAULT; 53511da177e4SLinus Torvalds private->attrib = attrib; 53521da177e4SLinus Torvalds 5353fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5354fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 53551da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 53561da177e4SLinus Torvalds return 0; 53571da177e4SLinus Torvalds } 53581da177e4SLinus Torvalds 5359ab1d848fSNigel Hislop /* 5360ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5361ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5362ab1d848fSNigel Hislop */ 5363ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5364ab1d848fSNigel Hislop { 5365ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5366ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5367ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5368ab1d848fSNigel Hislop struct ccw1 *ccw; 536952898025SNigel Hislop char psf0, psf1; 5370ab1d848fSNigel Hislop int rc; 5371ab1d848fSNigel Hislop 537252898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 537352898025SNigel Hislop return -EACCES; 537452898025SNigel Hislop psf0 = psf1 = 0; 537552898025SNigel Hislop 5376ab1d848fSNigel Hislop /* Copy parms from caller */ 5377ab1d848fSNigel Hislop rc = -EFAULT; 5378ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5379ab1d848fSNigel Hislop goto out; 538092d62891SHeiko Carstens if (is_compat_task()) { 5381ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5382ab1d848fSNigel Hislop rc = -EINVAL; 5383f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5384ab1d848fSNigel Hislop goto out; 5385f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5386f8b06859SHeiko Carstens goto out; 5387f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5388f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5389ab1d848fSNigel Hislop } 53904a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 53914a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 53924a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 53934a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 53944a8ef699SStefan Haberland usrparm.psf_data_len); 53954a8ef699SStefan Haberland rc = -EINVAL; 53964a8ef699SStefan Haberland goto out; 53974a8ef699SStefan Haberland } 5398ab1d848fSNigel Hislop /* alloc I/O data area */ 5399ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5400ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5401ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5402ab1d848fSNigel Hislop rc = -ENOMEM; 5403ab1d848fSNigel Hislop goto out_free; 5404ab1d848fSNigel Hislop } 5405ab1d848fSNigel Hislop 5406ab1d848fSNigel Hislop /* get syscall header from user space */ 5407ab1d848fSNigel Hislop rc = -EFAULT; 5408ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5409ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5410ab1d848fSNigel Hislop usrparm.psf_data_len)) 5411ab1d848fSNigel Hislop goto out_free; 541252898025SNigel Hislop psf0 = psf_data[0]; 541352898025SNigel Hislop psf1 = psf_data[1]; 5414ab1d848fSNigel Hislop 5415ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5416c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5417ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5418fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5419ab1d848fSNigel Hislop "Could not allocate initialization request"); 5420ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5421ab1d848fSNigel Hislop goto out_free; 5422ab1d848fSNigel Hislop } 5423ab1d848fSNigel Hislop 5424ab1d848fSNigel Hislop cqr->startdev = device; 5425ab1d848fSNigel Hislop cqr->memdev = device; 5426ab1d848fSNigel Hislop cqr->retries = 3; 5427ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 54281aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5429ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5430ab1d848fSNigel Hislop 5431ab1d848fSNigel Hislop /* Build the ccws */ 5432ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5433ab1d848fSNigel Hislop 5434ab1d848fSNigel Hislop /* PSF ccw */ 5435ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5436ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5437ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5438ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 5439ab1d848fSNigel Hislop 5440ab1d848fSNigel Hislop ccw++; 5441ab1d848fSNigel Hislop 5442ab1d848fSNigel Hislop /* RSSD ccw */ 5443ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5444ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5445ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5446ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 5447ab1d848fSNigel Hislop 5448ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5449ab1d848fSNigel Hislop if (rc) 5450ab1d848fSNigel Hislop goto out_sfree; 5451ab1d848fSNigel Hislop 5452ab1d848fSNigel Hislop rc = -EFAULT; 5453ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5454ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5455ab1d848fSNigel Hislop goto out_sfree; 5456ab1d848fSNigel Hislop rc = 0; 5457ab1d848fSNigel Hislop 5458ab1d848fSNigel Hislop out_sfree: 5459ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5460ab1d848fSNigel Hislop out_free: 5461ab1d848fSNigel Hislop kfree(rssd_result); 5462ab1d848fSNigel Hislop kfree(psf_data); 5463ab1d848fSNigel Hislop out: 546452898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 546552898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 546652898025SNigel Hislop (int) psf0, (int) psf1, rc); 5467ab1d848fSNigel Hislop return rc; 5468ab1d848fSNigel Hislop } 5469ab1d848fSNigel Hislop 54701107ccfbSChristoph Hellwig static int 54718e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 54721107ccfbSChristoph Hellwig { 54738e09f215SStefan Weinhuber struct dasd_device *device = block->base; 54748e09f215SStefan Weinhuber 54751107ccfbSChristoph Hellwig switch (cmd) { 54761107ccfbSChristoph Hellwig case BIODASDGATTR: 54771107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 54781107ccfbSChristoph Hellwig case BIODASDSATTR: 54791107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 54801107ccfbSChristoph Hellwig case BIODASDPSRD: 54811107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 54821107ccfbSChristoph Hellwig case BIODASDRLSE: 54831107ccfbSChristoph Hellwig return dasd_eckd_release(device); 54841107ccfbSChristoph Hellwig case BIODASDRSRV: 54851107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 54861107ccfbSChristoph Hellwig case BIODASDSLCK: 54871107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5488196339f1SStefan Weinhuber case BIODASDSNID: 5489196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5490ab1d848fSNigel Hislop case BIODASDSYMMIO: 5491ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 54921107ccfbSChristoph Hellwig default: 54936b79d14eSHeiko Carstens return -ENOTTY; 54941107ccfbSChristoph Hellwig } 54951107ccfbSChristoph Hellwig } 54961107ccfbSChristoph Hellwig 54971da177e4SLinus Torvalds /* 5498445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5499445b5b49SHorst Hummel * and return number of printed chars. 5500445b5b49SHorst Hummel */ 5501b49e648fSStefan Haberland static void 5502445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5503445b5b49SHorst Hummel { 5504445b5b49SHorst Hummel int len, count; 5505445b5b49SHorst Hummel char *datap; 5506445b5b49SHorst Hummel 5507445b5b49SHorst Hummel len = 0; 5508445b5b49SHorst Hummel while (from <= to) { 5509773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5510445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5511445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5512445b5b49SHorst Hummel 5513445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5514445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5515445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 5516445b5b49SHorst Hummel else 5517445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 5518445b5b49SHorst Hummel 5519b49e648fSStefan Haberland /* dump data (max 128 bytes) */ 5520b49e648fSStefan Haberland for (count = 0; count < from->count && count < 128; count++) { 5521b49e648fSStefan Haberland if (count % 32 == 0) 5522b49e648fSStefan Haberland len += sprintf(page + len, "\n"); 5523b49e648fSStefan Haberland if (count % 8 == 0) 5524b49e648fSStefan Haberland len += sprintf(page + len, " "); 5525b49e648fSStefan Haberland if (count % 4 == 0) 5526b49e648fSStefan Haberland len += sprintf(page + len, " "); 5527445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5528445b5b49SHorst Hummel } 5529445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5530445b5b49SHorst Hummel from++; 5531445b5b49SHorst Hummel } 5532b49e648fSStefan Haberland if (len > 0) 5533b49e648fSStefan Haberland printk(KERN_ERR "%s", page); 5534445b5b49SHorst Hummel } 5535445b5b49SHorst Hummel 5536fc19f381SStefan Haberland static void 5537aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5538aeec92caSStefan Haberland char *reason) 5539fc19f381SStefan Haberland { 5540fc19f381SStefan Haberland u64 *sense; 5541a5a0061fSStefan Weinhuber u64 *stat; 5542fc19f381SStefan Haberland 5543aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5544a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5545fc19f381SStefan Haberland if (sense) { 5546a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5547a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5548a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5549ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5550fc19f381SStefan Haberland } else { 5551a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5552a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5553a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5554fc19f381SStefan Haberland } 5555fc19f381SStefan Haberland } 5556fc19f381SStefan Haberland 5557445b5b49SHorst Hummel /* 55581da177e4SLinus Torvalds * Print sense data and related channel program. 55591da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 55601da177e4SLinus Torvalds */ 5561f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 55628e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 55631da177e4SLinus Torvalds { 55641da177e4SLinus Torvalds char *page; 5565445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5566445b5b49SHorst Hummel int len, sl, sct; 55671da177e4SLinus Torvalds 55681da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 55691da177e4SLinus Torvalds if (page == NULL) { 5570fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5571fc19f381SStefan Haberland "No memory to dump sense data\n"); 55721da177e4SLinus Torvalds return; 55731da177e4SLinus Torvalds } 5574445b5b49SHorst Hummel /* dump the sense data */ 5575773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 55761da177e4SLinus Torvalds " I/O status report for device %s:\n", 55772a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5578773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5579a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5580a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5581a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5582a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5583a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5584a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5585773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55861da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 55872a0217d5SKay Sievers dev_name(&device->cdev->dev), 558823d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 55891da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 55901da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5591773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55921da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 55931da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 55941da177e4SLinus Torvalds 55951da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 55961da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 55971da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 55981da177e4SLinus Torvalds } 55991da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 56001da177e4SLinus Torvalds } 56011da177e4SLinus Torvalds 56021da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 56031da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5604773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 56051da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 56061da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 56071da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 56081da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 56091da177e4SLinus Torvalds } else { 56101da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5611773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 56121da177e4SLinus Torvalds " 32 Byte: Format: %x " 56131da177e4SLinus Torvalds "Exception class %x\n", 56141da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 56151da177e4SLinus Torvalds } 56161da177e4SLinus Torvalds } else { 5617773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 56181da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 56191da177e4SLinus Torvalds } 5620773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 56211da177e4SLinus Torvalds 56228e09f215SStefan Weinhuber if (req) { 56238e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5624445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5625b49e648fSStefan Haberland /* Count CCW and print first CCWs (maximum 7) */ 5626445b5b49SHorst Hummel first = req->cpaddr; 5627445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5628445b5b49SHorst Hummel to = min(first + 6, last); 5629b49e648fSStefan Haberland printk(KERN_ERR PRINTK_HEADER " Related CP in req: %p\n", req); 5630b49e648fSStefan Haberland dasd_eckd_dump_ccw_range(first, to, page); 56311da177e4SLinus Torvalds 5632445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5633445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 5634445b5b49SHorst Hummel from = ++to; 563523d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 563623d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5637445b5b49SHorst Hummel if (from < fail - 2) { 5638445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5639b49e648fSStefan Haberland printk(KERN_ERR PRINTK_HEADER "......\n"); 56401da177e4SLinus Torvalds } 5641445b5b49SHorst Hummel to = min(fail + 1, last); 5642b49e648fSStefan Haberland dasd_eckd_dump_ccw_range(from, to, page + len); 56431da177e4SLinus Torvalds 5644445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5645b49e648fSStefan Haberland len = 0; 5646445b5b49SHorst Hummel from = max(from, ++to); 5647445b5b49SHorst Hummel if (from < last - 1) { 5648445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5649b49e648fSStefan Haberland printk(KERN_ERR PRINTK_HEADER "......\n"); 56501da177e4SLinus Torvalds } 5651b49e648fSStefan Haberland dasd_eckd_dump_ccw_range(from, last, page + len); 56528e09f215SStefan Weinhuber } 56531da177e4SLinus Torvalds free_page((unsigned long) page); 56541da177e4SLinus Torvalds } 56551da177e4SLinus Torvalds 5656f3eb5384SStefan Weinhuber 5657f3eb5384SStefan Weinhuber /* 5658f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5659f3eb5384SStefan Weinhuber */ 5660f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5661f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5662f3eb5384SStefan Weinhuber { 5663f3eb5384SStefan Weinhuber char *page; 5664f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5665f3eb5384SStefan Weinhuber struct tsb *tsb; 5666ef19298bSStefan Weinhuber u8 *sense, *rcq; 5667f3eb5384SStefan Weinhuber 5668f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5669f3eb5384SStefan Weinhuber if (page == NULL) { 5670fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5671f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5672f3eb5384SStefan Weinhuber return; 5673f3eb5384SStefan Weinhuber } 5674f3eb5384SStefan Weinhuber /* dump the sense data */ 5675773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5676f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5677f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5678773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5679a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5680a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5681a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5682a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5683a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5684a521b048SStefan Haberland irb->scsw.tm.fcxs, 5685a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5686a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5687773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5688f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5689f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5690f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5691f3eb5384SStefan Weinhuber 5692f3eb5384SStefan Weinhuber tsb = NULL; 5693f3eb5384SStefan Weinhuber sense = NULL; 5694a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5695f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5696f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5697f3eb5384SStefan Weinhuber 5698b8fde722SStefan Haberland if (tsb) { 5699773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5700f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5701773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5702f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5703773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5704f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5705773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5706f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5707f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5708773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5709f3eb5384SStefan Weinhuber " residual %d\n", residual); 5710f3eb5384SStefan Weinhuber 5711f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5712f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5713773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5714f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5715f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5716773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5717f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5718f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5719773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5720f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5721f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5722773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5723f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5724f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5725773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5726f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5727f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5728f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5729f3eb5384SStefan Weinhuber break; 5730f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5731773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5732f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5733ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5734773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5735ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5736ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5737ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5738f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5739f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5740ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5741f3eb5384SStefan Weinhuber } 5742f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5743f3eb5384SStefan Weinhuber } 5744f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5745f3eb5384SStefan Weinhuber break; 5746f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5747773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 57488693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5749f3eb5384SStefan Weinhuber break; 5750f3eb5384SStefan Weinhuber } 5751f3eb5384SStefan Weinhuber 5752f3eb5384SStefan Weinhuber if (sense) { 5753f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5754773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5755f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5756f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5757f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5758f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5759f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5760f3eb5384SStefan Weinhuber } 5761f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5762f3eb5384SStefan Weinhuber } 5763f3eb5384SStefan Weinhuber 5764f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5765f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5766773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5767f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5768f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5769f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5770f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5771f3eb5384SStefan Weinhuber } else { 5772f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5773773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5774f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5775f3eb5384SStefan Weinhuber "Exception class %x\n", 5776f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5777f3eb5384SStefan Weinhuber } 5778f3eb5384SStefan Weinhuber } else { 5779773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5780f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5781f3eb5384SStefan Weinhuber } 5782f3eb5384SStefan Weinhuber } else { 5783773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5784f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5785f3eb5384SStefan Weinhuber } 5786773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5787f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5788f3eb5384SStefan Weinhuber } 5789f3eb5384SStefan Weinhuber 5790f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5791f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5792f3eb5384SStefan Weinhuber { 57938fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 57948fd57520SJan Höppner 57958fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 57968fd57520SJan Höppner /* 57978fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 57988fd57520SJan Höppner * error might be expected and log messages shouldn't be written 57998fd57520SJan Höppner * then. Check if the according suppress bit is set. 58008fd57520SJan Höppner */ 58018fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 58028fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 58038fd57520SJan Höppner return; 58048fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 58058fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 58068fd57520SJan Höppner return; 58078fd57520SJan Höppner 5808f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 58098fd57520SJan Höppner } else { 58108fd57520SJan Höppner /* 5811ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5812ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5813ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 58148fd57520SJan Höppner */ 5815ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5816ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5817ab24fbd3SStefan Haberland return; 5818ab24fbd3SStefan Haberland 58198fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 58208fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 58218fd57520SJan Höppner return; 58228fd57520SJan Höppner 5823f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5824f3eb5384SStefan Weinhuber } 58258fd57520SJan Höppner } 5826f3eb5384SStefan Weinhuber 5827501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5828501183f2SStefan Haberland { 5829543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5830501183f2SStefan Haberland int rc, old_base; 58312dedf0d9SStefan Haberland char print_uid[60]; 58322dedf0d9SStefan Haberland struct dasd_uid uid; 58332dedf0d9SStefan Haberland unsigned long flags; 5834501183f2SStefan Haberland 583559a9ed5fSStefan Haberland /* 583659a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 583759a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 583859a9ed5fSStefan Haberland */ 583959a9ed5fSStefan Haberland dasd_alias_remove_device(device); 584059a9ed5fSStefan Haberland 58412dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5842501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 58432dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 58442dedf0d9SStefan Haberland 5845501183f2SStefan Haberland /* Read Configuration Data */ 5846501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5847501183f2SStefan Haberland if (rc) 5848501183f2SStefan Haberland goto out_err; 5849501183f2SStefan Haberland 585074e2f211SStefan Haberland dasd_eckd_read_fc_security(device); 585174e2f211SStefan Haberland 58522dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5853501183f2SStefan Haberland if (rc) 5854501183f2SStefan Haberland goto out_err; 5855501183f2SStefan Haberland /* 5856501183f2SStefan Haberland * update unit address configuration and 5857501183f2SStefan Haberland * add device to alias management 5858501183f2SStefan Haberland */ 5859501183f2SStefan Haberland dasd_alias_update_add_device(device); 5860501183f2SStefan Haberland 58612dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 58622dedf0d9SStefan Haberland 58632dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 5864542e30ceSStefan Haberland dasd_eckd_get_uid_string(&private->conf, print_uid); 5865501183f2SStefan Haberland dev_info(&device->cdev->dev, 5866501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 58672dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5868501183f2SStefan Haberland } 5869501183f2SStefan Haberland return 0; 5870501183f2SStefan Haberland 5871501183f2SStefan Haberland out_err: 5872501183f2SStefan Haberland return -1; 5873501183f2SStefan Haberland } 5874501183f2SStefan Haberland 58755db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 58765db8440cSStefan Haberland struct dasd_rssd_messages *messages, 58775db8440cSStefan Haberland __u8 lpum) 58785db8440cSStefan Haberland { 58795db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 58805db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 58815db8440cSStefan Haberland struct dasd_ccw_req *cqr; 58825db8440cSStefan Haberland struct ccw1 *ccw; 58835db8440cSStefan Haberland int rc; 58845db8440cSStefan Haberland 58855db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 58865db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 58875db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5888c5205f2fSSebastian Ott device, NULL); 58895db8440cSStefan Haberland if (IS_ERR(cqr)) { 58905db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58915db8440cSStefan Haberland "Could not allocate read message buffer request"); 58925db8440cSStefan Haberland return PTR_ERR(cqr); 58935db8440cSStefan Haberland } 58945db8440cSStefan Haberland 5895af775210SStefan Haberland cqr->lpm = lpum; 5896af775210SStefan Haberland retry: 58975db8440cSStefan Haberland cqr->startdev = device; 58985db8440cSStefan Haberland cqr->memdev = device; 58995db8440cSStefan Haberland cqr->block = NULL; 59005db8440cSStefan Haberland cqr->expires = 10 * HZ; 59015db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5902b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5903b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5904b179b037SStefan Haberland * do basic erp */ 5905b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5906b179b037SStefan Haberland cqr->retries = 256; 59075db8440cSStefan Haberland 59085db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 59095db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59105db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 59115db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 59125db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 59135db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 59145db8440cSStefan Haberland 59155db8440cSStefan Haberland ccw = cqr->cpaddr; 59165db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59175db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 59185db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 59195db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59205db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 59215db8440cSStefan Haberland 59225db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 59235db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 59245db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 59255db8440cSStefan Haberland 59265db8440cSStefan Haberland ccw++; 59275db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 59285db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 59295db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59305db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 59315db8440cSStefan Haberland 59325db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 59335db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 59345db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 59355db8440cSStefan Haberland if (rc == 0) { 59365db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59375db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 59385db8440cSStefan Haberland (prssdp + 1); 59395db8440cSStefan Haberland memcpy(messages, message_buf, 59405db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5941af775210SStefan Haberland } else if (cqr->lpm) { 5942af775210SStefan Haberland /* 5943af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5944af775210SStefan Haberland * but instead we get the required information on any path 5945af775210SStefan Haberland * so retry with open path mask 5946af775210SStefan Haberland */ 5947af775210SStefan Haberland cqr->lpm = 0; 5948af775210SStefan Haberland goto retry; 59495db8440cSStefan Haberland } else 59505db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 59515db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 59525db8440cSStefan Haberland , rc); 59535db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59545db8440cSStefan Haberland return rc; 59555db8440cSStefan Haberland } 59565db8440cSStefan Haberland 59575a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 59585a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 59595a3b7b11SStefan Haberland { 59605a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 59615a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 59625a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 59635a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 59645a3b7b11SStefan Haberland struct ccw1 *ccw; 59655a3b7b11SStefan Haberland int rc; 59665a3b7b11SStefan Haberland 59675a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 59685a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 59695a3b7b11SStefan Haberland return -EOPNOTSUPP; 59705a3b7b11SStefan Haberland 5971ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5972ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5973ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5974ccd53fa2SStefan Haberland 59755a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 59765a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5977c5205f2fSSebastian Ott device, NULL); 59785a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 59795a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59805a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 59815a3b7b11SStefan Haberland return PTR_ERR(cqr); 59825a3b7b11SStefan Haberland } 59835a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 59845a3b7b11SStefan Haberland if (!host_access) { 59855a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 59865a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59875a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 59885a3b7b11SStefan Haberland return -ENOMEM; 59895a3b7b11SStefan Haberland } 59905a3b7b11SStefan Haberland cqr->startdev = device; 59915a3b7b11SStefan Haberland cqr->memdev = device; 59925a3b7b11SStefan Haberland cqr->block = NULL; 59935a3b7b11SStefan Haberland cqr->retries = 256; 59945a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 59955a3b7b11SStefan Haberland 59965a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 59975a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59985a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 59995a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 60005a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 60015a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 6002542e30ceSStefan Haberland prssdp->lss = private->conf.ned->ID; 6003542e30ceSStefan Haberland prssdp->volume = private->conf.ned->unit_addr; 60045a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 60055a3b7b11SStefan Haberland 60065a3b7b11SStefan Haberland ccw = cqr->cpaddr; 60075a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 60085a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 60095a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 60105a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 60115a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 60125a3b7b11SStefan Haberland 60135a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 60145a3b7b11SStefan Haberland ccw++; 60155a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 60165a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 60175a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 60185a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 60195a3b7b11SStefan Haberland 60205a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 60215a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 6022ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 6023ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 6024f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 60255a3b7b11SStefan Haberland if (rc == 0) { 60265a3b7b11SStefan Haberland *data = *host_access; 60275a3b7b11SStefan Haberland } else { 60285a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 60295a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 60305a3b7b11SStefan Haberland rc); 60315a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 60325a3b7b11SStefan Haberland } 60335a3b7b11SStefan Haberland 60345a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 60355a3b7b11SStefan Haberland kfree(host_access); 60365a3b7b11SStefan Haberland return rc; 60375a3b7b11SStefan Haberland } 60385a3b7b11SStefan Haberland /* 60395a3b7b11SStefan Haberland * return number of grouped devices 60405a3b7b11SStefan Haberland */ 60415a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 60425a3b7b11SStefan Haberland { 60435a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60445a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60455a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60465a3b7b11SStefan Haberland int count = 0; 60475a3b7b11SStefan Haberland int rc, i; 60485a3b7b11SStefan Haberland 60495a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60505a3b7b11SStefan Haberland if (!access) { 60515a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60525a3b7b11SStefan Haberland "Could not allocate access buffer"); 60535a3b7b11SStefan Haberland return -ENOMEM; 60545a3b7b11SStefan Haberland } 60555a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60565a3b7b11SStefan Haberland if (rc) { 60575a3b7b11SStefan Haberland kfree(access); 60585a3b7b11SStefan Haberland return rc; 60595a3b7b11SStefan Haberland } 60605a3b7b11SStefan Haberland 60615a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60625a3b7b11SStefan Haberland access->host_access_information; 60635a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 60645a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 60655a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 60665a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 60675a3b7b11SStefan Haberland count++; 60685a3b7b11SStefan Haberland } 60695a3b7b11SStefan Haberland 60705a3b7b11SStefan Haberland kfree(access); 60715a3b7b11SStefan Haberland return count; 60725a3b7b11SStefan Haberland } 60735a3b7b11SStefan Haberland 60745a3b7b11SStefan Haberland /* 60755a3b7b11SStefan Haberland * write host access information to a sequential file 60765a3b7b11SStefan Haberland */ 60775a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 60785a3b7b11SStefan Haberland { 60795a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60805a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60815a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60825a3b7b11SStefan Haberland char sysplex[9] = ""; 6083c7848e14SChristophe JAILLET int rc, i; 60845a3b7b11SStefan Haberland 60855a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60865a3b7b11SStefan Haberland if (!access) { 60875a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60885a3b7b11SStefan Haberland "Could not allocate access buffer"); 60895a3b7b11SStefan Haberland return -ENOMEM; 60905a3b7b11SStefan Haberland } 60915a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60925a3b7b11SStefan Haberland if (rc) { 60935a3b7b11SStefan Haberland kfree(access); 60945a3b7b11SStefan Haberland return rc; 60955a3b7b11SStefan Haberland } 60965a3b7b11SStefan Haberland 60975a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60985a3b7b11SStefan Haberland access->host_access_information; 60995a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 61005a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 61015a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 61025a3b7b11SStefan Haberland /* PGID */ 6103c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 61045a3b7b11SStefan Haberland /* FLAGS */ 61055a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 61065a3b7b11SStefan Haberland /* SYSPLEX NAME */ 61075a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 61085a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 61095a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 61105a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 61115a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 61125a3b7b11SStefan Haberland /* TIMESTAMP */ 61135a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 61145a3b7b11SStefan Haberland entry->timestamp); 61155a3b7b11SStefan Haberland } 61165a3b7b11SStefan Haberland kfree(access); 61175a3b7b11SStefan Haberland 61185a3b7b11SStefan Haberland return 0; 61195a3b7b11SStefan Haberland } 61205a3b7b11SStefan Haberland 6121413862caSStefan Haberland static struct dasd_device 6122413862caSStefan Haberland *copy_relation_find_device(struct dasd_copy_relation *copy, 6123413862caSStefan Haberland char *busid) 6124413862caSStefan Haberland { 6125413862caSStefan Haberland int i; 6126413862caSStefan Haberland 6127413862caSStefan Haberland for (i = 0; i < DASD_CP_ENTRIES; i++) { 6128413862caSStefan Haberland if (copy->entry[i].configured && 6129413862caSStefan Haberland strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) 6130413862caSStefan Haberland return copy->entry[i].device; 6131413862caSStefan Haberland } 6132413862caSStefan Haberland return NULL; 6133413862caSStefan Haberland } 6134413862caSStefan Haberland 6135413862caSStefan Haberland /* 6136413862caSStefan Haberland * set the new active/primary device 6137413862caSStefan Haberland */ 6138413862caSStefan Haberland static void copy_pair_set_active(struct dasd_copy_relation *copy, char *new_busid, 6139413862caSStefan Haberland char *old_busid) 6140413862caSStefan Haberland { 6141413862caSStefan Haberland int i; 6142413862caSStefan Haberland 6143413862caSStefan Haberland for (i = 0; i < DASD_CP_ENTRIES; i++) { 6144413862caSStefan Haberland if (copy->entry[i].configured && 6145413862caSStefan Haberland strncmp(copy->entry[i].busid, new_busid, 6146413862caSStefan Haberland DASD_BUS_ID_SIZE) == 0) { 6147413862caSStefan Haberland copy->active = ©->entry[i]; 6148413862caSStefan Haberland copy->entry[i].primary = true; 6149413862caSStefan Haberland } else if (copy->entry[i].configured && 6150413862caSStefan Haberland strncmp(copy->entry[i].busid, old_busid, 6151413862caSStefan Haberland DASD_BUS_ID_SIZE) == 0) { 6152413862caSStefan Haberland copy->entry[i].primary = false; 6153413862caSStefan Haberland } 6154413862caSStefan Haberland } 6155413862caSStefan Haberland } 6156413862caSStefan Haberland 6157413862caSStefan Haberland /* 6158413862caSStefan Haberland * The function will swap the role of a given copy pair. 6159413862caSStefan Haberland * During the swap operation the relation of the blockdevice is disconnected 6160413862caSStefan Haberland * from the old primary and connected to the new. 6161413862caSStefan Haberland * 6162413862caSStefan Haberland * IO is paused on the block queue before swap and may be resumed afterwards. 6163413862caSStefan Haberland */ 6164413862caSStefan Haberland static int dasd_eckd_copy_pair_swap(struct dasd_device *device, char *prim_busid, 6165413862caSStefan Haberland char *sec_busid) 6166413862caSStefan Haberland { 6167413862caSStefan Haberland struct dasd_device *primary, *secondary; 6168413862caSStefan Haberland struct dasd_copy_relation *copy; 6169413862caSStefan Haberland struct dasd_block *block; 6170413862caSStefan Haberland struct gendisk *gdp; 6171413862caSStefan Haberland 6172413862caSStefan Haberland copy = device->copy; 6173413862caSStefan Haberland if (!copy) 6174413862caSStefan Haberland return DASD_COPYPAIRSWAP_INVALID; 6175413862caSStefan Haberland primary = copy->active->device; 6176413862caSStefan Haberland if (!primary) 6177413862caSStefan Haberland return DASD_COPYPAIRSWAP_INVALID; 6178413862caSStefan Haberland /* double check if swap has correct primary */ 6179413862caSStefan Haberland if (strncmp(dev_name(&primary->cdev->dev), prim_busid, DASD_BUS_ID_SIZE) != 0) 6180413862caSStefan Haberland return DASD_COPYPAIRSWAP_PRIMARY; 6181413862caSStefan Haberland 6182413862caSStefan Haberland secondary = copy_relation_find_device(copy, sec_busid); 6183413862caSStefan Haberland if (!secondary) 6184413862caSStefan Haberland return DASD_COPYPAIRSWAP_SECONDARY; 6185413862caSStefan Haberland 6186413862caSStefan Haberland /* 6187413862caSStefan Haberland * usually the device should be quiesced for swap 6188413862caSStefan Haberland * for paranoia stop device and requeue requests again 6189413862caSStefan Haberland */ 6190413862caSStefan Haberland dasd_device_set_stop_bits(primary, DASD_STOPPED_PPRC); 6191413862caSStefan Haberland dasd_device_set_stop_bits(secondary, DASD_STOPPED_PPRC); 6192413862caSStefan Haberland dasd_generic_requeue_all_requests(primary); 6193413862caSStefan Haberland 6194413862caSStefan Haberland /* swap DASD internal device <> block assignment */ 6195413862caSStefan Haberland block = primary->block; 6196413862caSStefan Haberland primary->block = NULL; 6197413862caSStefan Haberland secondary->block = block; 6198413862caSStefan Haberland block->base = secondary; 6199413862caSStefan Haberland /* set new primary device in COPY relation */ 6200413862caSStefan Haberland copy_pair_set_active(copy, sec_busid, prim_busid); 6201413862caSStefan Haberland 6202413862caSStefan Haberland /* swap blocklayer device link */ 6203413862caSStefan Haberland gdp = block->gdp; 6204413862caSStefan Haberland dasd_add_link_to_gendisk(gdp, secondary); 6205413862caSStefan Haberland 6206413862caSStefan Haberland /* re-enable device */ 6207413862caSStefan Haberland dasd_device_remove_stop_bits(primary, DASD_STOPPED_PPRC); 6208413862caSStefan Haberland dasd_device_remove_stop_bits(secondary, DASD_STOPPED_PPRC); 6209413862caSStefan Haberland dasd_schedule_device_bh(secondary); 6210413862caSStefan Haberland 6211413862caSStefan Haberland return DASD_COPYPAIRSWAP_SUCCESS; 6212413862caSStefan Haberland } 6213413862caSStefan Haberland 62145db8440cSStefan Haberland /* 62153f217cceSStefan Haberland * Perform Subsystem Function - Peer-to-Peer Remote Copy Extended Query 62163f217cceSStefan Haberland */ 62173f217cceSStefan Haberland static int dasd_eckd_query_pprc_status(struct dasd_device *device, 62183f217cceSStefan Haberland struct dasd_pprc_data_sc4 *data) 62193f217cceSStefan Haberland { 62203f217cceSStefan Haberland struct dasd_pprc_data_sc4 *pprc_data; 62213f217cceSStefan Haberland struct dasd_psf_prssd_data *prssdp; 62223f217cceSStefan Haberland struct dasd_ccw_req *cqr; 62233f217cceSStefan Haberland struct ccw1 *ccw; 62243f217cceSStefan Haberland int rc; 62253f217cceSStefan Haberland 62263f217cceSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 62273f217cceSStefan Haberland sizeof(*prssdp) + sizeof(*pprc_data) + 1, 62283f217cceSStefan Haberland device, NULL); 62293f217cceSStefan Haberland if (IS_ERR(cqr)) { 62303f217cceSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 62313f217cceSStefan Haberland "Could not allocate query PPRC status request"); 62323f217cceSStefan Haberland return PTR_ERR(cqr); 62333f217cceSStefan Haberland } 62343f217cceSStefan Haberland cqr->startdev = device; 62353f217cceSStefan Haberland cqr->memdev = device; 62363f217cceSStefan Haberland cqr->block = NULL; 62373f217cceSStefan Haberland cqr->retries = 256; 62383f217cceSStefan Haberland cqr->expires = 10 * HZ; 62393f217cceSStefan Haberland 62403f217cceSStefan Haberland /* Prepare for Read Subsystem Data */ 62413f217cceSStefan Haberland prssdp = (struct dasd_psf_prssd_data *)cqr->data; 62423f217cceSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 62433f217cceSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 62443f217cceSStefan Haberland prssdp->suborder = PSF_SUBORDER_PPRCEQ; 62453f217cceSStefan Haberland prssdp->varies[0] = PPRCEQ_SCOPE_4; 62463f217cceSStefan Haberland pprc_data = (struct dasd_pprc_data_sc4 *)(prssdp + 1); 62473f217cceSStefan Haberland 62483f217cceSStefan Haberland ccw = cqr->cpaddr; 62493f217cceSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 62503f217cceSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 62513f217cceSStefan Haberland ccw->flags |= CCW_FLAG_CC; 62523f217cceSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 62533f217cceSStefan Haberland ccw->cda = (__u32)(addr_t)prssdp; 62543f217cceSStefan Haberland 62553f217cceSStefan Haberland /* Read Subsystem Data - query host access */ 62563f217cceSStefan Haberland ccw++; 62573f217cceSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 62583f217cceSStefan Haberland ccw->count = sizeof(*pprc_data); 62593f217cceSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 62603f217cceSStefan Haberland ccw->cda = (__u32)(addr_t)pprc_data; 62613f217cceSStefan Haberland 62623f217cceSStefan Haberland cqr->buildclk = get_tod_clock(); 62633f217cceSStefan Haberland cqr->status = DASD_CQR_FILLED; 62643f217cceSStefan Haberland 62653f217cceSStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 62663f217cceSStefan Haberland if (rc == 0) { 62673f217cceSStefan Haberland *data = *pprc_data; 62683f217cceSStefan Haberland } else { 62693f217cceSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 62703f217cceSStefan Haberland "PPRC Extended Query failed with rc=%d\n", 62713f217cceSStefan Haberland rc); 62723f217cceSStefan Haberland rc = -EOPNOTSUPP; 62733f217cceSStefan Haberland } 62743f217cceSStefan Haberland 62753f217cceSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 62763f217cceSStefan Haberland return rc; 62773f217cceSStefan Haberland } 62783f217cceSStefan Haberland 62793f217cceSStefan Haberland /* 628032ff8ce0SStefan Haberland * ECKD NOP - no operation 628132ff8ce0SStefan Haberland */ 628232ff8ce0SStefan Haberland static int dasd_eckd_nop(struct dasd_device *device) 628332ff8ce0SStefan Haberland { 628432ff8ce0SStefan Haberland struct dasd_ccw_req *cqr; 628532ff8ce0SStefan Haberland struct ccw1 *ccw; 628632ff8ce0SStefan Haberland int rc; 628732ff8ce0SStefan Haberland 628832ff8ce0SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 1, device, NULL); 628932ff8ce0SStefan Haberland if (IS_ERR(cqr)) { 629032ff8ce0SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 629132ff8ce0SStefan Haberland "Could not allocate NOP request"); 629232ff8ce0SStefan Haberland return PTR_ERR(cqr); 629332ff8ce0SStefan Haberland } 629432ff8ce0SStefan Haberland cqr->startdev = device; 629532ff8ce0SStefan Haberland cqr->memdev = device; 629632ff8ce0SStefan Haberland cqr->block = NULL; 629732ff8ce0SStefan Haberland cqr->retries = 1; 629832ff8ce0SStefan Haberland cqr->expires = 10 * HZ; 629932ff8ce0SStefan Haberland 630032ff8ce0SStefan Haberland ccw = cqr->cpaddr; 630132ff8ce0SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_NOP; 630232ff8ce0SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 630332ff8ce0SStefan Haberland 630432ff8ce0SStefan Haberland cqr->buildclk = get_tod_clock(); 630532ff8ce0SStefan Haberland cqr->status = DASD_CQR_FILLED; 630632ff8ce0SStefan Haberland 630732ff8ce0SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 630832ff8ce0SStefan Haberland if (rc != 0) { 630932ff8ce0SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 631032ff8ce0SStefan Haberland "NOP failed with rc=%d\n", rc); 631132ff8ce0SStefan Haberland rc = -EOPNOTSUPP; 631232ff8ce0SStefan Haberland } 631332ff8ce0SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 631432ff8ce0SStefan Haberland return rc; 631532ff8ce0SStefan Haberland } 631632ff8ce0SStefan Haberland 631732ff8ce0SStefan Haberland static int dasd_eckd_device_ping(struct dasd_device *device) 631832ff8ce0SStefan Haberland { 631932ff8ce0SStefan Haberland return dasd_eckd_nop(device); 632032ff8ce0SStefan Haberland } 632132ff8ce0SStefan Haberland 632232ff8ce0SStefan Haberland /* 63235db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 63245db8440cSStefan Haberland */ 63255db8440cSStefan Haberland static int 63265db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6327a521b048SStefan Haberland __u32 message_id, __u8 lpum) 63285db8440cSStefan Haberland { 63295db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 6330a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 63315db8440cSStefan Haberland struct dasd_ccw_req *cqr; 63325db8440cSStefan Haberland struct ccw1 *ccw; 63335db8440cSStefan Haberland int rc; 63345db8440cSStefan Haberland 63355db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 63365db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 6337c5205f2fSSebastian Ott device, NULL); 63385db8440cSStefan Haberland 63395db8440cSStefan Haberland if (IS_ERR(cqr)) { 63405db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 63415db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 63425db8440cSStefan Haberland return PTR_ERR(cqr); 63435db8440cSStefan Haberland } 63445db8440cSStefan Haberland 63455db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 63465db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 63475db8440cSStefan Haberland psf_cuir->cc = response; 6348a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 63495db8440cSStefan Haberland psf_cuir->message_id = message_id; 6350a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 6351a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 63525db8440cSStefan Haberland ccw = cqr->cpaddr; 63535db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 63545db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 6355b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 63565db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 63575db8440cSStefan Haberland 63585db8440cSStefan Haberland cqr->startdev = device; 63595db8440cSStefan Haberland cqr->memdev = device; 63605db8440cSStefan Haberland cqr->block = NULL; 63615db8440cSStefan Haberland cqr->retries = 256; 63625db8440cSStefan Haberland cqr->expires = 10*HZ; 63635db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 63645db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 6365b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 63665db8440cSStefan Haberland 63675db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 63685db8440cSStefan Haberland 63695db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 63705db8440cSStefan Haberland return rc; 63715db8440cSStefan Haberland } 63725db8440cSStefan Haberland 6373b179b037SStefan Haberland /* 6374b179b037SStefan Haberland * return configuration data that is referenced by record selector 6375b179b037SStefan Haberland * if a record selector is specified or per default return the 6376b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 6377b179b037SStefan Haberland */ 6378b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6379b179b037SStefan Haberland __u8 lpum, 6380b179b037SStefan Haberland struct dasd_cuir_message *cuir) 63815db8440cSStefan Haberland { 6382b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6383b179b037SStefan Haberland int path, pos; 63845db8440cSStefan Haberland 6385b179b037SStefan Haberland if (cuir->record_selector == 0) 6386b179b037SStefan Haberland goto out; 6387b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6388c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 6389b179b037SStefan Haberland if (conf_data->gneq.record_selector == 6390b179b037SStefan Haberland cuir->record_selector) 6391b179b037SStefan Haberland return conf_data; 63925db8440cSStefan Haberland } 6393b179b037SStefan Haberland out: 6394c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 63955db8440cSStefan Haberland } 63965db8440cSStefan Haberland 63975db8440cSStefan Haberland /* 6398b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6399b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6400b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6401b179b037SStefan Haberland * 6402b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6403b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6404b179b037SStefan Haberland * on. 6405b179b037SStefan Haberland */ 6406b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6407b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6408b179b037SStefan Haberland { 6409b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6410b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6411b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6412b179b037SStefan Haberland unsigned int pos, path; 6413b179b037SStefan Haberland char *ref_gneq, *gneq; 6414b179b037SStefan Haberland char *ref_ned, *ned; 6415b179b037SStefan Haberland int tbcpm = 0; 6416b179b037SStefan Haberland 6417b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6418b179b037SStefan Haberland the attention message was presented on */ 6419b179b037SStefan Haberland if (!cuir->ned_map || 6420b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6421b179b037SStefan Haberland return lpum; 6422b179b037SStefan Haberland 6423b179b037SStefan Haberland /* get reference conf data */ 6424b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6425b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6426b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6427b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6428b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6429b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6430b179b037SStefan Haberland mask = cuir->neq_map[2]; 6431b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6432b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6433b179b037SStefan Haberland 6434c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6435b179b037SStefan Haberland /* initialise data per path */ 6436b179b037SStefan Haberland bitmask = mask; 6437c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6438b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6439b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6440b179b037SStefan Haberland /* compare reference ned and per path ned */ 6441b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6442b179b037SStefan Haberland continue; 6443b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6444b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6445b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6446b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6447b179b037SStefan Haberland while (bitmask) { 6448b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6449b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6450b179b037SStefan Haberland != 0) 6451b179b037SStefan Haberland break; 6452b179b037SStefan Haberland clear_bit(pos, &bitmask); 6453b179b037SStefan Haberland } 6454b179b037SStefan Haberland if (bitmask) 6455b179b037SStefan Haberland continue; 6456b179b037SStefan Haberland /* device and path match the reference values 6457b179b037SStefan Haberland add path to CUIR scope */ 6458c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6459b179b037SStefan Haberland } 6460b179b037SStefan Haberland return tbcpm; 6461b179b037SStefan Haberland } 6462b179b037SStefan Haberland 6463b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6464a521b048SStefan Haberland unsigned long paths, int action) 6465b179b037SStefan Haberland { 6466b179b037SStefan Haberland int pos; 6467b179b037SStefan Haberland 6468b179b037SStefan Haberland while (paths) { 6469b179b037SStefan Haberland /* get position of bit in mask */ 6470a521b048SStefan Haberland pos = 8 - ffs(paths); 6471b179b037SStefan Haberland /* get channel path descriptor from this position */ 6472b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6473a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6474a521b048SStefan Haberland device->path[pos].cssid, 6475a521b048SStefan Haberland device->path[pos].chpid); 6476b179b037SStefan Haberland else if (action == CUIR_RESUME) 6477a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6478a521b048SStefan Haberland device->path[pos].cssid, 6479a521b048SStefan Haberland device->path[pos].chpid); 6480a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6481b179b037SStefan Haberland } 6482b179b037SStefan Haberland } 6483b179b037SStefan Haberland 6484b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6485b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6486b179b037SStefan Haberland { 6487b179b037SStefan Haberland unsigned long tbcpm; 6488b179b037SStefan Haberland 6489b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6490b179b037SStefan Haberland /* nothing to do if path is not in use */ 6491c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6492b179b037SStefan Haberland return 0; 6493c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6494b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6495b179b037SStefan Haberland return error */ 6496b179b037SStefan Haberland return -EINVAL; 6497b179b037SStefan Haberland } 6498b179b037SStefan Haberland /* remove device from operational path mask */ 6499c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6500c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6501b179b037SStefan Haberland return tbcpm; 6502b179b037SStefan Haberland } 6503b179b037SStefan Haberland 6504b179b037SStefan Haberland /* 6505b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6506b179b037SStefan Haberland * return an error if the last path to a device would be removed 65075db8440cSStefan Haberland * 65085db8440cSStefan Haberland * if only part of the devices are quiesced and an error 65095db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 65105db8440cSStefan Haberland * notify the already set offline devices again 65115db8440cSStefan Haberland */ 65125db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6513b179b037SStefan Haberland struct dasd_cuir_message *cuir) 65145db8440cSStefan Haberland { 6515543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 65165db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 65175db8440cSStefan Haberland struct dasd_device *dev, *n; 6518b179b037SStefan Haberland unsigned long paths = 0; 6519b179b037SStefan Haberland unsigned long flags; 6520b179b037SStefan Haberland int tbcpm; 65215db8440cSStefan Haberland 65225db8440cSStefan Haberland /* active devices */ 6523b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 65245db8440cSStefan Haberland alias_list) { 6525b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6526b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6527b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6528b179b037SStefan Haberland if (tbcpm < 0) 6529b179b037SStefan Haberland goto out_err; 6530b179b037SStefan Haberland paths |= tbcpm; 65315db8440cSStefan Haberland } 65325db8440cSStefan Haberland /* inactive devices */ 6533b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 65345db8440cSStefan Haberland alias_list) { 6535b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6536b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6537b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6538b179b037SStefan Haberland if (tbcpm < 0) 6539b179b037SStefan Haberland goto out_err; 6540b179b037SStefan Haberland paths |= tbcpm; 65415db8440cSStefan Haberland } 65425db8440cSStefan Haberland /* devices in PAV groups */ 65435db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 65445db8440cSStefan Haberland &private->lcu->grouplist, group) { 65455db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 65465db8440cSStefan Haberland alias_list) { 6547b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6548b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6549b179b037SStefan Haberland spin_unlock_irqrestore( 6550b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6551b179b037SStefan Haberland if (tbcpm < 0) 6552b179b037SStefan Haberland goto out_err; 6553b179b037SStefan Haberland paths |= tbcpm; 65545db8440cSStefan Haberland } 65555db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 65565db8440cSStefan Haberland alias_list) { 6557b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6558b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6559b179b037SStefan Haberland spin_unlock_irqrestore( 6560b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6561b179b037SStefan Haberland if (tbcpm < 0) 6562b179b037SStefan Haberland goto out_err; 6563b179b037SStefan Haberland paths |= tbcpm; 65645db8440cSStefan Haberland } 65655db8440cSStefan Haberland } 6566b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6567a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6568b179b037SStefan Haberland return 0; 6569b179b037SStefan Haberland out_err: 6570b179b037SStefan Haberland return tbcpm; 65715db8440cSStefan Haberland } 65725db8440cSStefan Haberland 65735db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6574b179b037SStefan Haberland struct dasd_cuir_message *cuir) 65755db8440cSStefan Haberland { 6576543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 65775db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 65785db8440cSStefan Haberland struct dasd_device *dev, *n; 6579b179b037SStefan Haberland unsigned long paths = 0; 6580b179b037SStefan Haberland int tbcpm; 65815db8440cSStefan Haberland 65825db8440cSStefan Haberland /* 65835db8440cSStefan Haberland * the path may have been added through a generic path event before 65845db8440cSStefan Haberland * only trigger path verification if the path is not already in use 65855db8440cSStefan Haberland */ 65865db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 65875db8440cSStefan Haberland &private->lcu->active_devices, 65885db8440cSStefan Haberland alias_list) { 6589b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6590b179b037SStefan Haberland paths |= tbcpm; 6591c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6592c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 65935db8440cSStefan Haberland dasd_schedule_device_bh(dev); 65945db8440cSStefan Haberland } 65955db8440cSStefan Haberland } 65965db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 65975db8440cSStefan Haberland &private->lcu->inactive_devices, 65985db8440cSStefan Haberland alias_list) { 6599b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6600b179b037SStefan Haberland paths |= tbcpm; 6601c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6602c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 66035db8440cSStefan Haberland dasd_schedule_device_bh(dev); 66045db8440cSStefan Haberland } 66055db8440cSStefan Haberland } 66065db8440cSStefan Haberland /* devices in PAV groups */ 66075db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 66085db8440cSStefan Haberland &private->lcu->grouplist, 66095db8440cSStefan Haberland group) { 66105db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 66115db8440cSStefan Haberland &pavgroup->baselist, 66125db8440cSStefan Haberland alias_list) { 6613b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6614b179b037SStefan Haberland paths |= tbcpm; 6615c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6616c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 66175db8440cSStefan Haberland dasd_schedule_device_bh(dev); 66185db8440cSStefan Haberland } 66195db8440cSStefan Haberland } 66205db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 66215db8440cSStefan Haberland &pavgroup->aliaslist, 66225db8440cSStefan Haberland alias_list) { 6623b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6624b179b037SStefan Haberland paths |= tbcpm; 6625c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6626c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 66275db8440cSStefan Haberland dasd_schedule_device_bh(dev); 66285db8440cSStefan Haberland } 66295db8440cSStefan Haberland } 66305db8440cSStefan Haberland } 6631b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6632a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6633b179b037SStefan Haberland return 0; 66345db8440cSStefan Haberland } 66355db8440cSStefan Haberland 66365db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 66375db8440cSStefan Haberland __u8 lpum) 66385db8440cSStefan Haberland { 66395db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6640a521b048SStefan Haberland int response; 66415db8440cSStefan Haberland 6642b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6643b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6644b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6645b179b037SStefan Haberland ((u32 *)cuir)[3]); 66465db8440cSStefan Haberland 66475db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 66485db8440cSStefan Haberland /* quiesce */ 6649a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6650b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6651b179b037SStefan Haberland else 6652b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 66535db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 66545db8440cSStefan Haberland /* resume */ 6655a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6656b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 66575db8440cSStefan Haberland } else 66585db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 66595db8440cSStefan Haberland 6660b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6661a521b048SStefan Haberland cuir->message_id, lpum); 6662b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6663b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6664b179b037SStefan Haberland cuir->message_id); 6665b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6666b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 66675db8440cSStefan Haberland } 66685db8440cSStefan Haberland 66699e12e54cSJan Höppner static void dasd_eckd_oos_resume(struct dasd_device *device) 66709e12e54cSJan Höppner { 66719e12e54cSJan Höppner struct dasd_eckd_private *private = device->private; 66729e12e54cSJan Höppner struct alias_pav_group *pavgroup, *tempgroup; 66739e12e54cSJan Höppner struct dasd_device *dev, *n; 66749e12e54cSJan Höppner unsigned long flags; 66759e12e54cSJan Höppner 66769e12e54cSJan Höppner spin_lock_irqsave(&private->lcu->lock, flags); 66779e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 66789e12e54cSJan Höppner alias_list) { 66799e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 66809e12e54cSJan Höppner dasd_generic_space_avail(dev); 66819e12e54cSJan Höppner } 66829e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 66839e12e54cSJan Höppner alias_list) { 66849e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 66859e12e54cSJan Höppner dasd_generic_space_avail(dev); 66869e12e54cSJan Höppner } 66879e12e54cSJan Höppner /* devices in PAV groups */ 66889e12e54cSJan Höppner list_for_each_entry_safe(pavgroup, tempgroup, 66899e12e54cSJan Höppner &private->lcu->grouplist, 66909e12e54cSJan Höppner group) { 66919e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->baselist, 66929e12e54cSJan Höppner alias_list) { 66939e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 66949e12e54cSJan Höppner dasd_generic_space_avail(dev); 66959e12e54cSJan Höppner } 66969e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 66979e12e54cSJan Höppner alias_list) { 66989e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 66999e12e54cSJan Höppner dasd_generic_space_avail(dev); 67009e12e54cSJan Höppner } 67019e12e54cSJan Höppner } 67029e12e54cSJan Höppner spin_unlock_irqrestore(&private->lcu->lock, flags); 67039e12e54cSJan Höppner } 67049e12e54cSJan Höppner 67059e12e54cSJan Höppner static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 67069e12e54cSJan Höppner __u8 lpum) 67079e12e54cSJan Höppner { 67089e12e54cSJan Höppner struct dasd_oos_message *oos = messages; 67099e12e54cSJan Höppner 67109e12e54cSJan Höppner switch (oos->code) { 67119e12e54cSJan Höppner case REPO_WARN: 67129e12e54cSJan Höppner case POOL_WARN: 67139e12e54cSJan Höppner dev_warn(&device->cdev->dev, 67149e12e54cSJan Höppner "Extent pool usage has reached a critical value\n"); 67159e12e54cSJan Höppner dasd_eckd_oos_resume(device); 67169e12e54cSJan Höppner break; 67179e12e54cSJan Höppner case REPO_EXHAUST: 67189e12e54cSJan Höppner case POOL_EXHAUST: 67199e12e54cSJan Höppner dev_warn(&device->cdev->dev, 67209e12e54cSJan Höppner "Extent pool is exhausted\n"); 67219e12e54cSJan Höppner break; 67229e12e54cSJan Höppner case REPO_RELIEVE: 67239e12e54cSJan Höppner case POOL_RELIEVE: 67249e12e54cSJan Höppner dev_info(&device->cdev->dev, 67259e12e54cSJan Höppner "Extent pool physical space constraint has been relieved\n"); 67269e12e54cSJan Höppner break; 67279e12e54cSJan Höppner } 67289e12e54cSJan Höppner 67299e12e54cSJan Höppner /* In any case, update related data */ 67309e12e54cSJan Höppner dasd_eckd_read_ext_pool_info(device); 67319e12e54cSJan Höppner 67329e12e54cSJan Höppner /* to make sure there is no attention left schedule work again */ 67339e12e54cSJan Höppner device->discipline->check_attention(device, lpum); 67349e12e54cSJan Höppner } 67359e12e54cSJan Höppner 67365db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 67375db8440cSStefan Haberland { 67385db8440cSStefan Haberland struct check_attention_work_data *data; 67395db8440cSStefan Haberland struct dasd_rssd_messages *messages; 67405db8440cSStefan Haberland struct dasd_device *device; 67415db8440cSStefan Haberland int rc; 67425db8440cSStefan Haberland 67435db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 67445db8440cSStefan Haberland device = data->device; 67455db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 67465db8440cSStefan Haberland if (!messages) { 67475db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 67485db8440cSStefan Haberland "Could not allocate attention message buffer"); 67495db8440cSStefan Haberland goto out; 67505db8440cSStefan Haberland } 67515db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 67525db8440cSStefan Haberland if (rc) 67535db8440cSStefan Haberland goto out; 67549e12e54cSJan Höppner 67555db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 67565db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 67575db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 67589e12e54cSJan Höppner if (messages->length == ATTENTION_LENGTH_OOS && 67599e12e54cSJan Höppner messages->format == ATTENTION_FORMAT_OOS) 67609e12e54cSJan Höppner dasd_eckd_handle_oos(device, messages, data->lpum); 67619e12e54cSJan Höppner 67625db8440cSStefan Haberland out: 67635db8440cSStefan Haberland dasd_put_device(device); 67645db8440cSStefan Haberland kfree(messages); 67655db8440cSStefan Haberland kfree(data); 67665db8440cSStefan Haberland } 67675db8440cSStefan Haberland 67685db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 67695db8440cSStefan Haberland { 67705db8440cSStefan Haberland struct check_attention_work_data *data; 67715db8440cSStefan Haberland 67725db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 67735db8440cSStefan Haberland if (!data) 67745db8440cSStefan Haberland return -ENOMEM; 67755db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 67765db8440cSStefan Haberland dasd_get_device(device); 67775db8440cSStefan Haberland data->device = device; 67785db8440cSStefan Haberland data->lpum = lpum; 67795db8440cSStefan Haberland schedule_work(&data->worker); 67805db8440cSStefan Haberland return 0; 67815db8440cSStefan Haberland } 67825db8440cSStefan Haberland 6783a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6784a521b048SStefan Haberland { 6785a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6786a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6787a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6788a521b048SStefan Haberland dev_err(&device->cdev->dev, 6789a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6790a521b048SStefan Haberland lpum); 6791a521b048SStefan Haberland return 1; 6792a521b048SStefan Haberland } 6793a521b048SStefan Haberland return 0; 6794a521b048SStefan Haberland } 6795a521b048SStefan Haberland 6796a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6797a521b048SStefan Haberland { 6798a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6799a521b048SStefan Haberland 6800a521b048SStefan Haberland dev_err(&device->cdev->dev, 6801a521b048SStefan Haberland "High Performance FICON disabled\n"); 6802a521b048SStefan Haberland private->fcx_max_data = 0; 6803a521b048SStefan Haberland } 6804a521b048SStefan Haberland 6805a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6806a521b048SStefan Haberland { 6807a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6808a521b048SStefan Haberland 6809a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6810a521b048SStefan Haberland } 6811a521b048SStefan Haberland 6812a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6813a521b048SStefan Haberland struct irb *irb) 6814a521b048SStefan Haberland { 6815a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6816a521b048SStefan Haberland 6817a521b048SStefan Haberland if (!private->fcx_max_data) { 6818a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6819a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6820a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6821a521b048SStefan Haberland return; 6822a521b048SStefan Haberland } 6823a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6824a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6825a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6826a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6827a521b048SStefan Haberland return; 6828a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6829a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6830a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6831a521b048SStefan Haberland } 6832a521b048SStefan Haberland /* 6833a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6834a521b048SStefan Haberland * requeue of existing requests 6835a521b048SStefan Haberland */ 6836a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6837a521b048SStefan Haberland dasd_schedule_requeue(device); 6838a521b048SStefan Haberland } 6839a521b048SStefan Haberland 6840a0610a8aSJan Höppner /* 6841a0610a8aSJan Höppner * Initialize block layer request queue. 6842a0610a8aSJan Höppner */ 6843a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6844a0610a8aSJan Höppner { 6845a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6846c68f4f4eSChristoph Hellwig struct request_queue *q = block->gdp->queue; 6847a0610a8aSJan Höppner struct dasd_device *device = block->base; 6848a0610a8aSJan Höppner int max; 6849a0610a8aSJan Höppner 6850a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6851a0610a8aSJan Höppner /* 6852a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6853a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6854a0610a8aSJan Höppner * only need one ccw per track 6855a0610a8aSJan Höppner * so the max_hw_sectors are 6856a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6857a0610a8aSJan Höppner */ 6858a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6859a0610a8aSJan Höppner } else { 6860a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6861a0610a8aSJan Höppner } 6862a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6863a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6864a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6865a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6866a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6867a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6868a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6869a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6870bc792884SEric Farman blk_queue_dma_alignment(q, PAGE_SIZE - 1); 6871a0610a8aSJan Höppner } 6872a0610a8aSJan Höppner 6873d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 68743bda058bSSebastian Ott .driver = { 6875d41dd122SStefan Haberland .name = "dasd-eckd", 6876d41dd122SStefan Haberland .owner = THIS_MODULE, 68771987c551SJulian Wiedmann .dev_groups = dasd_dev_groups, 68783bda058bSSebastian Ott }, 6879d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6880d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6881d41dd122SStefan Haberland .remove = dasd_generic_remove, 6882d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6883d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6884d41dd122SStefan Haberland .notify = dasd_generic_notify, 6885a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 68864679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6887a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6888420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6889d41dd122SStefan Haberland }; 6890f3eb5384SStefan Weinhuber 68911da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 68921da177e4SLinus Torvalds .owner = THIS_MODULE, 68931da177e4SLinus Torvalds .name = "ECKD", 68941da177e4SLinus Torvalds .ebcname = "ECKD", 68951da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 68968e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 68971da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6898b7294932SJan Höppner .pe_handler = dasd_eckd_pe_handler, 6899d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 69008e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6901daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6902a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 69031da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 69041da177e4SLinus Torvalds .start_IO = dasd_start_IO, 69051da177e4SLinus Torvalds .term_IO = dasd_term_IO, 69068e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 69071da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 69088fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 69091da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 69101da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 69115a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 69128e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 69138e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 69141da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6915fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 69161da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 69171107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6918501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 69192dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6920f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 69215db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 69225a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 69235a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6924a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6925a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6926a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6927a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6928c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6929c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6930c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6931c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 693291dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6933c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6934c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6935c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6936c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6937c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 69389e12e54cSJan Höppner .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 69395e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 69405e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 69413f217cceSStefan Haberland .pprc_status = dasd_eckd_query_pprc_status, 6942a91ff09dSStefan Haberland .pprc_enabled = dasd_eckd_pprc_enabled, 6943413862caSStefan Haberland .copy_pair_swap = dasd_eckd_copy_pair_swap, 694432ff8ce0SStefan Haberland .device_ping = dasd_eckd_device_ping, 69451da177e4SLinus Torvalds }; 69461da177e4SLinus Torvalds 69471da177e4SLinus Torvalds static int __init 69481da177e4SLinus Torvalds dasd_eckd_init(void) 69491da177e4SLinus Torvalds { 6950736e6ea0SSebastian Ott int ret; 6951736e6ea0SSebastian Ott 69521da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6953f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6954f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6955f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6956f932bceaSStefan Weinhuber return -ENOMEM; 69579e12e54cSJan Höppner dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 69589e12e54cSJan Höppner GFP_KERNEL | GFP_DMA); 69599e12e54cSJan Höppner if (!dasd_vol_info_req) 69609e12e54cSJan Höppner return -ENOMEM; 6961b7294932SJan Höppner pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), 6962a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6963b7294932SJan Höppner if (!pe_handler_worker) { 6964a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 69659e12e54cSJan Höppner kfree(dasd_vol_info_req); 6966a4d26c6aSStefan Weinhuber return -ENOMEM; 6967a4d26c6aSStefan Weinhuber } 6968558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6969558b9ef0SStefan Weinhuber if (!rawpadpage) { 6970b7294932SJan Höppner kfree(pe_handler_worker); 6971558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 69729e12e54cSJan Höppner kfree(dasd_vol_info_req); 6973558b9ef0SStefan Weinhuber return -ENOMEM; 6974558b9ef0SStefan Weinhuber } 6975736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6976736e6ea0SSebastian Ott if (!ret) 6977736e6ea0SSebastian Ott wait_for_device_probe(); 6978a4d26c6aSStefan Weinhuber else { 6979b7294932SJan Höppner kfree(pe_handler_worker); 6980f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 69819e12e54cSJan Höppner kfree(dasd_vol_info_req); 6982558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6983a4d26c6aSStefan Weinhuber } 6984736e6ea0SSebastian Ott return ret; 69851da177e4SLinus Torvalds } 69861da177e4SLinus Torvalds 69871da177e4SLinus Torvalds static void __exit 69881da177e4SLinus Torvalds dasd_eckd_cleanup(void) 69891da177e4SLinus Torvalds { 69901da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6991b7294932SJan Höppner kfree(pe_handler_worker); 6992f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6993558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 69941da177e4SLinus Torvalds } 69951da177e4SLinus Torvalds 69961da177e4SLinus Torvalds module_init(dasd_eckd_init); 69971da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6998