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; 563*542e30ceSStefan Haberland pfxdata->base_address = basepriv->conf.ned->unit_addr; 564*542e30ceSStefan 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. */ 739*542e30ceSStefan 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)); 744*542e30ceSStefan Haberland memcpy(uid->vendor, conf->ned->HDA_manufacturer, 7453d052595SHorst Hummel sizeof(uid->vendor) - 1); 7463d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 747*542e30ceSStefan Haberland memcpy(uid->serial, &conf->ned->serial, 7483d052595SHorst Hummel sizeof(uid->serial) - 1); 7493d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 750*542e30ceSStefan Haberland uid->ssid = conf->gneq->subsystemID; 751*542e30ceSStefan Haberland uid->real_unit_addr = conf->ned->unit_addr; 752*542e30ceSStefan Haberland if (conf->sneq) { 753*542e30ceSStefan Haberland uid->type = conf->sneq->sua_flags; 7548e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 755*542e30ceSStefan Haberland uid->base_unit_addr = conf->sneq->base_unit_addr; 7568e09f215SStefan Weinhuber } else { 7578e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7588e09f215SStefan Weinhuber } 759*542e30ceSStefan Haberland if (conf->vdsneq) { 7604abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7614abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 762*542e30ceSStefan 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; 777*542e30ceSStefan Haberland if (!private->conf.ned || !private->conf.gneq) 778b206181dSStefan Haberland return -ENODEV; 779b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 780*542e30ceSStefan 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, 804*542e30ceSStefan Haberland struct dasd_conf *path_conf) 805b206181dSStefan Haberland { 806b206181dSStefan Haberland struct dasd_uid device_uid; 807*542e30ceSStefan Haberland struct dasd_uid path_uid; 808b206181dSStefan Haberland 809*542e30ceSStefan Haberland create_uid(path_conf, &path_uid); 810b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 811b206181dSStefan Haberland 812*542e30ceSStefan 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 948*542e30ceSStefan 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 954*542e30ceSStefan Haberland conf->ned = NULL; 955*542e30ceSStefan Haberland conf->sneq = NULL; 956*542e30ceSStefan Haberland conf->vdsneq = NULL; 957*542e30ceSStefan Haberland conf->gneq = NULL; 958*542e30ceSStefan Haberland count = conf->len / sizeof(struct dasd_sneq); 959*542e30ceSStefan 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) 962*542e30ceSStefan Haberland conf->sneq = sneq; 9634abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 964*542e30ceSStefan Haberland conf->vdsneq = (struct vd_sneq *)sneq; 9654abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 966*542e30ceSStefan Haberland conf->gneq = (struct dasd_gneq *)sneq; 9674abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 968*542e30ceSStefan Haberland conf->ned = (struct dasd_ned *)sneq; 9694abb08c2SStefan Weinhuber sneq++; 9704abb08c2SStefan Weinhuber } 971*542e30ceSStefan Haberland if (!conf->ned || !conf->gneq) { 972*542e30ceSStefan Haberland conf->ned = NULL; 973*542e30ceSStefan Haberland conf->sneq = NULL; 974*542e30ceSStefan Haberland conf->vdsneq = NULL; 975*542e30ceSStefan 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; 1018*542e30ceSStefan Haberland if (private->conf.data == cdp) { 1019*542e30ceSStefan Haberland private->conf.data = (void *)conf_data; 1020*542e30ceSStefan 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 1038*542e30ceSStefan Haberland private->conf.data = NULL; 1039*542e30ceSStefan 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 1073*542e30ceSStefan Haberland static void dasd_eckd_get_uid_string(struct dasd_conf *conf, 107423596961SStefan Haberland char *print_uid) 107523596961SStefan Haberland { 1076*542e30ceSStefan Haberland struct dasd_uid uid; 107723596961SStefan Haberland 1078*542e30ceSStefan Haberland create_uid(conf, &uid); 1079*542e30ceSStefan Haberland if (strlen(uid.vduit) > 0) 108023596961SStefan Haberland snprintf(print_uid, sizeof(*print_uid), 108123596961SStefan Haberland "%s.%s.%04x.%02x.%s", 1082*542e30ceSStefan Haberland uid.vendor, uid.serial, uid.ssid, 1083*542e30ceSStefan Haberland uid.real_unit_addr, uid.vduit); 108423596961SStefan Haberland else 108523596961SStefan Haberland snprintf(print_uid, sizeof(*print_uid), 108623596961SStefan Haberland "%s.%s.%04x.%02x", 1087*542e30ceSStefan Haberland uid.vendor, uid.serial, uid.ssid, 1088*542e30ceSStefan 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]; 1096*542e30ceSStefan Haberland struct dasd_conf path_conf; 109723596961SStefan Haberland 1098*542e30ceSStefan Haberland path_conf.data = conf_data; 1099*542e30ceSStefan Haberland path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1100*542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_conf)) 110123596961SStefan Haberland return 1; 110223596961SStefan Haberland 1103*542e30ceSStefan Haberland if (dasd_eckd_compare_path_uid(device, &path_conf)) { 1104*542e30ceSStefan Haberland dasd_eckd_get_uid_string(&path_conf, print_path_uid); 1105*542e30ceSStefan 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); 1151*542e30ceSStefan Haberland private->conf.data = conf_data; 1152*542e30ceSStefan Haberland private->conf.len = conf_len; 1153*542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&private->conf)) { 1154*542e30ceSStefan Haberland private->conf.data = NULL; 1155*542e30ceSStefan 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; 1205*542e30ceSStefan 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 } 1274*542e30ceSStefan Haberland memcpy(private->conf.data, data->rcd_buffer, 1275b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1276*542e30ceSStefan 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; 1294*542e30ceSStefan 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); 1358*542e30ceSStefan Haberland path_conf.data = (void *)&path_rcd_buf; 1359*542e30ceSStefan Haberland path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1360*542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_conf)) { 1361*542e30ceSStefan Haberland path_conf.data = NULL; 1362*542e30ceSStefan 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) && 1373*542e30ceSStefan 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( 1387*542e30ceSStefan Haberland device, &path_conf)) { 1388*542e30ceSStefan 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); 140646018121SJan Höppner } 140746018121SJan Höppner pos = pathmask_to_pos(lpm); 140846018121SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 140946018121SJan Höppner 1410a4d26c6aSStefan Weinhuber /* 1411a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1412a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1413a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1414a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1415a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1416a4d26c6aSStefan Weinhuber */ 1417a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1418c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1419c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1420a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14215db8440cSStefan Haberland } else { 1422c9346151SStefan Haberland dasd_path_add_opm(device, opm); 14235db8440cSStefan Haberland } 1424c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1425c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1426c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1427c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1428c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1429a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 143019508b20SJan Höppner 143119508b20SJan Höppner dasd_path_create_kobj(device, pos); 1432b206181dSStefan Haberland } 1433b7294932SJan Höppner } 1434b7294932SJan Höppner 1435b7294932SJan Höppner static void do_pe_handler_work(struct work_struct *work) 1436b7294932SJan Höppner { 1437b7294932SJan Höppner struct pe_handler_work_data *data; 1438b7294932SJan Höppner struct dasd_device *device; 1439b7294932SJan Höppner 1440b7294932SJan Höppner data = container_of(work, struct pe_handler_work_data, worker); 1441b7294932SJan Höppner device = data->device; 1442b7294932SJan Höppner 1443b7294932SJan Höppner /* delay path verification until device was resumed */ 1444b7294932SJan Höppner if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1445b7294932SJan Höppner schedule_work(work); 1446b7294932SJan Höppner return; 1447b7294932SJan Höppner } 1448b7294932SJan Höppner /* check if path verification already running and delay if so */ 1449b7294932SJan Höppner if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1450b7294932SJan Höppner schedule_work(work); 1451b7294932SJan Höppner return; 1452b7294932SJan Höppner } 1453b7294932SJan Höppner 14544d063e64SJan Höppner if (data->tbvpm) 1455b7294932SJan Höppner dasd_eckd_path_available_action(device, data); 14564d063e64SJan Höppner if (data->fcsecpm) 14574d063e64SJan Höppner dasd_eckd_read_fc_security(device); 1458b7294932SJan Höppner 14591eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1460a4d26c6aSStefan Weinhuber dasd_put_device(device); 1461a4d26c6aSStefan Weinhuber if (data->isglobal) 1462b7294932SJan Höppner mutex_unlock(&dasd_pe_handler_mutex); 1463a4d26c6aSStefan Weinhuber else 1464a4d26c6aSStefan Weinhuber kfree(data); 1465a4d26c6aSStefan Weinhuber } 1466a4d26c6aSStefan Weinhuber 14674d063e64SJan Höppner static int dasd_eckd_pe_handler(struct dasd_device *device, 14684d063e64SJan Höppner __u8 tbvpm, __u8 fcsecpm) 1469a4d26c6aSStefan Weinhuber { 1470b7294932SJan Höppner struct pe_handler_work_data *data; 1471a4d26c6aSStefan Weinhuber 1472a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1473a4d26c6aSStefan Weinhuber if (!data) { 1474b7294932SJan Höppner if (mutex_trylock(&dasd_pe_handler_mutex)) { 1475b7294932SJan Höppner data = pe_handler_worker; 1476a4d26c6aSStefan Weinhuber data->isglobal = 1; 1477b7294932SJan Höppner } else { 1478a4d26c6aSStefan Weinhuber return -ENOMEM; 1479b7294932SJan Höppner } 1480a4d26c6aSStefan Weinhuber } else { 1481a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1482a4d26c6aSStefan Weinhuber data->isglobal = 0; 1483a4d26c6aSStefan Weinhuber } 1484b7294932SJan Höppner INIT_WORK(&data->worker, do_pe_handler_work); 1485a4d26c6aSStefan Weinhuber dasd_get_device(device); 1486a4d26c6aSStefan Weinhuber data->device = device; 14874d063e64SJan Höppner data->tbvpm = tbvpm; 14884d063e64SJan Höppner data->fcsecpm = fcsecpm; 1489a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1490a4d26c6aSStefan Weinhuber return 0; 1491a4d26c6aSStefan Weinhuber } 1492a4d26c6aSStefan Weinhuber 1493a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1494a521b048SStefan Haberland { 1495a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1496a521b048SStefan Haberland unsigned long flags; 1497a521b048SStefan Haberland 1498a521b048SStefan Haberland if (!private->fcx_max_data) 1499a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1500a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1501a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1502a521b048SStefan Haberland dasd_schedule_device_bh(device); 1503a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1504a521b048SStefan Haberland } 1505a521b048SStefan Haberland 15068e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 15078e09f215SStefan Weinhuber { 1508543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 15098e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 15108e09f215SStefan Weinhuber struct dasd_rssd_features *features; 15118e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 15128e09f215SStefan Weinhuber struct ccw1 *ccw; 15138e09f215SStefan Weinhuber int rc; 15148e09f215SStefan Weinhuber 151568d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 151668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 15178e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 15188e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1519c5205f2fSSebastian Ott device, NULL); 15208e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1521b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1522b8ed5dd5SStefan Haberland "allocate initialization request"); 15238e09f215SStefan Weinhuber return PTR_ERR(cqr); 15248e09f215SStefan Weinhuber } 15258e09f215SStefan Weinhuber cqr->startdev = device; 15268e09f215SStefan Weinhuber cqr->memdev = device; 15278e09f215SStefan Weinhuber cqr->block = NULL; 1528eb6e199bSStefan Weinhuber cqr->retries = 256; 15298e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 15308e09f215SStefan Weinhuber 15318e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 15328e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15338e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 15348e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 15358e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 15368e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 15378e09f215SStefan Weinhuber 15388e09f215SStefan Weinhuber ccw = cqr->cpaddr; 15398e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 15408e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 15418e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 15428e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 15438e09f215SStefan Weinhuber 15448e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 15458e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15468e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15478e09f215SStefan Weinhuber 15488e09f215SStefan Weinhuber ccw++; 15498e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15508e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 15518e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 15528e09f215SStefan Weinhuber 15531aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15548e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15558e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15568e09f215SStefan Weinhuber if (rc == 0) { 15578e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15588e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15598e09f215SStefan Weinhuber memcpy(&private->features, features, 15608e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 156168d1e5f0SStefan Weinhuber } else 156268d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 156368d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15648e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15658e09f215SStefan Weinhuber return rc; 15668e09f215SStefan Weinhuber } 15678e09f215SStefan Weinhuber 1568c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1569c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1570c729696bSJan Höppner { 1571c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1572c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1573c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1574c729696bSJan Höppner struct dasd_ccw_req *cqr; 1575c729696bSJan Höppner struct ccw1 *ccw; 15769e12e54cSJan Höppner int useglobal; 1577c729696bSJan Höppner int rc; 1578c729696bSJan Höppner 1579c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1580c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1581c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1582c729696bSJan Höppner return 0; 1583c729696bSJan Höppner 15849e12e54cSJan Höppner useglobal = 0; 1585c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1586c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1587c729696bSJan Höppner if (IS_ERR(cqr)) { 1588c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1589c729696bSJan Höppner "Could not allocate initialization request"); 15909e12e54cSJan Höppner mutex_lock(&dasd_vol_info_mutex); 15919e12e54cSJan Höppner useglobal = 1; 15929e12e54cSJan Höppner cqr = &dasd_vol_info_req->cqr; 15939e12e54cSJan Höppner memset(cqr, 0, sizeof(*cqr)); 15949e12e54cSJan Höppner memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 15959e12e54cSJan Höppner cqr->cpaddr = &dasd_vol_info_req->ccw; 15969e12e54cSJan Höppner cqr->data = &dasd_vol_info_req->data; 15979e12e54cSJan Höppner cqr->magic = DASD_ECKD_MAGIC; 1598c729696bSJan Höppner } 1599c729696bSJan Höppner 1600c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1601c729696bSJan Höppner prssdp = cqr->data; 1602c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1603c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1604*542e30ceSStefan Haberland prssdp->lss = private->conf.ned->ID; 1605*542e30ceSStefan Haberland prssdp->volume = private->conf.ned->unit_addr; 1606c729696bSJan Höppner 1607c729696bSJan Höppner ccw = cqr->cpaddr; 1608c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1609c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1610c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1611c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1612c729696bSJan Höppner 1613c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1614c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1615c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1616c729696bSJan Höppner 1617c729696bSJan Höppner ccw++; 1618c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1619c729696bSJan Höppner ccw->count = sizeof(*vsq); 1620c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1621c729696bSJan Höppner ccw->cda = (__u32)(addr_t)vsq; 1622c729696bSJan Höppner 1623c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1624c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1625c729696bSJan Höppner cqr->startdev = device; 1626c729696bSJan Höppner cqr->memdev = device; 1627c729696bSJan Höppner cqr->block = NULL; 1628c729696bSJan Höppner cqr->retries = 256; 1629c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1630c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1631c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1632c729696bSJan Höppner 1633c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1634c729696bSJan Höppner if (rc == 0) { 1635c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1636c729696bSJan Höppner } else { 1637dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1638dd454839SJan Höppner "Reading the volume storage information failed with rc=%d", rc); 1639c729696bSJan Höppner } 1640c729696bSJan Höppner 16419e12e54cSJan Höppner if (useglobal) 16429e12e54cSJan Höppner mutex_unlock(&dasd_vol_info_mutex); 16439e12e54cSJan Höppner else 1644c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1645c729696bSJan Höppner 1646c729696bSJan Höppner return rc; 1647c729696bSJan Höppner } 1648c729696bSJan Höppner 1649c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1650c729696bSJan Höppner { 1651c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1652c729696bSJan Höppner 1653c729696bSJan Höppner return private->vsq.vol_info.ese; 1654c729696bSJan Höppner } 1655c729696bSJan Höppner 1656c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1657c729696bSJan Höppner { 1658c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1659c729696bSJan Höppner 1660c729696bSJan Höppner return private->vsq.extent_pool_id; 1661c729696bSJan Höppner } 1662c729696bSJan Höppner 1663c729696bSJan Höppner /* 1664c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1665c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1666c729696bSJan Höppner * The data for this value is therefore updated on any call. 1667c729696bSJan Höppner */ 1668c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1669c729696bSJan Höppner { 1670c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1671c729696bSJan Höppner int rc; 1672c729696bSJan Höppner 1673c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1674c729696bSJan Höppner 1675c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1676c729696bSJan Höppner } 1677c729696bSJan Höppner 1678c729696bSJan Höppner /* 1679c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1680c729696bSJan Höppner * therefore updated on any call. 1681c729696bSJan Höppner */ 1682c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1683c729696bSJan Höppner { 1684c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1685c729696bSJan Höppner int rc; 1686c729696bSJan Höppner 1687c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1688c729696bSJan Höppner 1689c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1690c729696bSJan Höppner } 1691c729696bSJan Höppner 1692c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1693c729696bSJan Höppner { 1694c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1695c729696bSJan Höppner 1696c729696bSJan Höppner return private->vsq.logical_capacity; 1697c729696bSJan Höppner } 1698c729696bSJan Höppner 16999e12e54cSJan Höppner static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 17009e12e54cSJan Höppner { 17019e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17029e12e54cSJan Höppner struct dasd_device *device; 17039e12e54cSJan Höppner struct dasd_device *base; 17049e12e54cSJan Höppner 17059e12e54cSJan Höppner data = container_of(work, struct ext_pool_exhaust_work_data, worker); 17069e12e54cSJan Höppner device = data->device; 17079e12e54cSJan Höppner base = data->base; 17089e12e54cSJan Höppner 17099e12e54cSJan Höppner if (!base) 17109e12e54cSJan Höppner base = device; 17119e12e54cSJan Höppner if (dasd_eckd_space_configured(base) != 0) { 17129e12e54cSJan Höppner dasd_generic_space_avail(device); 17139e12e54cSJan Höppner } else { 17149e12e54cSJan Höppner dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 17159e12e54cSJan Höppner DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 17169e12e54cSJan Höppner } 17179e12e54cSJan Höppner 17189e12e54cSJan Höppner dasd_put_device(device); 17199e12e54cSJan Höppner kfree(data); 17209e12e54cSJan Höppner } 17219e12e54cSJan Höppner 17229e12e54cSJan Höppner static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 17239e12e54cSJan Höppner struct dasd_ccw_req *cqr) 17249e12e54cSJan Höppner { 17259e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17269e12e54cSJan Höppner 17279e12e54cSJan Höppner data = kzalloc(sizeof(*data), GFP_ATOMIC); 17289e12e54cSJan Höppner if (!data) 17299e12e54cSJan Höppner return -ENOMEM; 17309e12e54cSJan Höppner INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 17319e12e54cSJan Höppner dasd_get_device(device); 17329e12e54cSJan Höppner data->device = device; 17339e12e54cSJan Höppner 17349e12e54cSJan Höppner if (cqr->block) 17359e12e54cSJan Höppner data->base = cqr->block->base; 17369e12e54cSJan Höppner else if (cqr->basedev) 17379e12e54cSJan Höppner data->base = cqr->basedev; 17389e12e54cSJan Höppner else 17399e12e54cSJan Höppner data->base = NULL; 17409e12e54cSJan Höppner 17419e12e54cSJan Höppner schedule_work(&data->worker); 17429e12e54cSJan Höppner 17439e12e54cSJan Höppner return 0; 17449e12e54cSJan Höppner } 17459e12e54cSJan Höppner 1746c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1747c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1748c729696bSJan Höppner { 1749c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1750c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1751c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1752c729696bSJan Höppner int i; 1753c729696bSJan Höppner 1754c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1755c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1756c729696bSJan Höppner if (eps.pool_id == pool_id) { 1757c729696bSJan Höppner memcpy(&private->eps, &eps, 1758c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1759c729696bSJan Höppner } 1760c729696bSJan Höppner } 1761c729696bSJan Höppner } 1762c729696bSJan Höppner 1763c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1764c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1765c729696bSJan Höppner { 1766c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1767c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1768c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1769c729696bSJan Höppner struct dasd_ccw_req *cqr; 1770c729696bSJan Höppner struct ccw1 *ccw; 1771c729696bSJan Höppner int rc; 1772c729696bSJan Höppner 1773c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1774c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1775c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1776c729696bSJan Höppner return 0; 1777c729696bSJan Höppner 1778c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1779c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1780c729696bSJan Höppner if (IS_ERR(cqr)) { 1781c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1782c729696bSJan Höppner "Could not allocate initialization request"); 1783c729696bSJan Höppner return PTR_ERR(cqr); 1784c729696bSJan Höppner } 1785c729696bSJan Höppner 1786c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1787c729696bSJan Höppner prssdp = cqr->data; 1788c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1789c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1790c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1791c729696bSJan Höppner 1792c729696bSJan Höppner ccw = cqr->cpaddr; 1793c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1794c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1795c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1796c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1797c729696bSJan Höppner 1798c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1799c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1800c729696bSJan Höppner 1801c729696bSJan Höppner ccw++; 1802c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1803c729696bSJan Höppner ccw->count = sizeof(*lcq); 1804c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1805c729696bSJan Höppner ccw->cda = (__u32)(addr_t)lcq; 1806c729696bSJan Höppner 1807c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1808c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1809c729696bSJan Höppner cqr->startdev = device; 1810c729696bSJan Höppner cqr->memdev = device; 1811c729696bSJan Höppner cqr->block = NULL; 1812c729696bSJan Höppner cqr->retries = 256; 1813c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1814c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1815c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1816c729696bSJan Höppner 1817c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1818c729696bSJan Höppner if (rc == 0) { 1819c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1820c729696bSJan Höppner } else { 1821dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1822dd454839SJan Höppner "Reading the logical configuration failed with rc=%d", rc); 1823c729696bSJan Höppner } 1824c729696bSJan Höppner 1825c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1826c729696bSJan Höppner 1827c729696bSJan Höppner return rc; 1828c729696bSJan Höppner } 1829c729696bSJan Höppner 1830c729696bSJan Höppner /* 1831c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1832c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1833c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1834c729696bSJan Höppner */ 1835c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1836c729696bSJan Höppner { 1837c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1838c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1839c729696bSJan Höppner 1840c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1841c729696bSJan Höppner return 0; 1842c729696bSJan Höppner if (eps.extent_size.size_1G) 1843c729696bSJan Höppner return 1113; 1844c729696bSJan Höppner if (eps.extent_size.size_16M) 1845c729696bSJan Höppner return 21; 1846c729696bSJan Höppner 1847c729696bSJan Höppner return 0; 1848c729696bSJan Höppner } 1849c729696bSJan Höppner 1850c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1851c729696bSJan Höppner { 1852c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1853c729696bSJan Höppner 1854c729696bSJan Höppner return private->eps.warn_thrshld; 1855c729696bSJan Höppner } 1856c729696bSJan Höppner 1857c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1858c729696bSJan Höppner { 1859c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1860c729696bSJan Höppner 1861c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1862c729696bSJan Höppner } 1863c729696bSJan Höppner 1864c729696bSJan Höppner /* 1865c729696bSJan Höppner * Extent Pool out of space 1866c729696bSJan Höppner */ 1867c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1868c729696bSJan Höppner { 1869c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1870c729696bSJan Höppner 1871c729696bSJan Höppner return private->eps.flags.pool_oos; 1872c729696bSJan Höppner } 18738e09f215SStefan Weinhuber 18743d052595SHorst Hummel /* 187540545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 187640545573SHorst Hummel */ 1877f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1878f3eb5384SStefan Weinhuber int enable_pav) 187940545573SHorst Hummel { 188040545573SHorst Hummel struct dasd_ccw_req *cqr; 188140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 188240545573SHorst Hummel struct ccw1 *ccw; 188340545573SHorst Hummel 188468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 188540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1886c5205f2fSSebastian Ott device, NULL); 188740545573SHorst Hummel 188840545573SHorst Hummel if (IS_ERR(cqr)) { 1889fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 189040545573SHorst Hummel "Could not allocate PSF-SSC request"); 189140545573SHorst Hummel return cqr; 189240545573SHorst Hummel } 189340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 189440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1895626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1896f3eb5384SStefan Weinhuber if (enable_pav) { 1897626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 18988e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1899f3eb5384SStefan Weinhuber } 190040545573SHorst Hummel ccw = cqr->cpaddr; 190140545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 190240545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 190340545573SHorst Hummel ccw->count = 66; 190440545573SHorst Hummel 19058e09f215SStefan Weinhuber cqr->startdev = device; 19068e09f215SStefan Weinhuber cqr->memdev = device; 19078e09f215SStefan Weinhuber cqr->block = NULL; 1908eb6e199bSStefan Weinhuber cqr->retries = 256; 190940545573SHorst Hummel cqr->expires = 10*HZ; 19101aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 191140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 191240545573SHorst Hummel return cqr; 191340545573SHorst Hummel } 191440545573SHorst Hummel 191540545573SHorst Hummel /* 191640545573SHorst Hummel * Perform Subsystem Function. 191740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 191840545573SHorst Hummel * call might change behaviour of DASD devices. 191940545573SHorst Hummel */ 192040545573SHorst Hummel static int 192112d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 192212d7b107SStefan Haberland unsigned long flags) 192340545573SHorst Hummel { 192440545573SHorst Hummel struct dasd_ccw_req *cqr; 192540545573SHorst Hummel int rc; 192640545573SHorst Hummel 1927f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 192840545573SHorst Hummel if (IS_ERR(cqr)) 192940545573SHorst Hummel return PTR_ERR(cqr); 193040545573SHorst Hummel 193112d7b107SStefan Haberland /* 193212d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 193312d7b107SStefan Haberland * the calling function should handle failed requests 193412d7b107SStefan Haberland */ 193512d7b107SStefan Haberland cqr->flags |= flags; 193612d7b107SStefan Haberland 193740545573SHorst Hummel rc = dasd_sleep_on(cqr); 193840545573SHorst Hummel if (!rc) 193940545573SHorst Hummel /* trigger CIO to reprobe devices */ 194040545573SHorst Hummel css_schedule_reprobe(); 194112d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 194212d7b107SStefan Haberland rc = -EAGAIN; 194312d7b107SStefan Haberland 19448e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 194540545573SHorst Hummel return rc; 194640545573SHorst Hummel } 194740545573SHorst Hummel 194840545573SHorst Hummel /* 194940545573SHorst Hummel * Valide storage server of current device. 195040545573SHorst Hummel */ 195112d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 195212d7b107SStefan Haberland unsigned long flags) 195340545573SHorst Hummel { 1954543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1955543691a4SSebastian Ott int enable_pav, rc; 195640545573SHorst Hummel 1957f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1958f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 195912d7b107SStefan Haberland return 0; 196040545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1961f3eb5384SStefan Weinhuber enable_pav = 0; 1962f3eb5384SStefan Weinhuber else 1963f3eb5384SStefan Weinhuber enable_pav = 1; 196412d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1965eb6e199bSStefan Weinhuber 196640545573SHorst Hummel /* may be requested feature is not available on server, 196740545573SHorst Hummel * therefore just report error and go ahead */ 1968b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1969b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 197012d7b107SStefan Haberland return rc; 197140545573SHorst Hummel } 197240545573SHorst Hummel 1973f1633031SStefan Haberland /* 1974f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1975f1633031SStefan Haberland */ 1976f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1977f1633031SStefan Haberland { 1978f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1979f1633031SStefan Haberland kick_validate); 1980ea4da6eaSStefan Haberland unsigned long flags = 0; 1981ea4da6eaSStefan Haberland 1982ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1983ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 198412d7b107SStefan Haberland == -EAGAIN) { 198512d7b107SStefan Haberland /* schedule worker again if failed */ 198612d7b107SStefan Haberland schedule_work(&device->kick_validate); 198712d7b107SStefan Haberland return; 198812d7b107SStefan Haberland } 198912d7b107SStefan Haberland 1990f1633031SStefan Haberland dasd_put_device(device); 1991f1633031SStefan Haberland } 1992f1633031SStefan Haberland 1993f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1994f1633031SStefan Haberland { 1995f1633031SStefan Haberland dasd_get_device(device); 199625e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 199725e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 199825e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 199925e2cf1cSStefan Haberland dasd_put_device(device); 200025e2cf1cSStefan Haberland return; 200125e2cf1cSStefan Haberland } 2002f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 2003f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 2004f2608cd4SStefan Haberland dasd_put_device(device); 2005f1633031SStefan Haberland } 2006f1633031SStefan Haberland 200740545573SHorst Hummel /* 20083d052595SHorst Hummel * Check device characteristics. 20093d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 20103d052595SHorst Hummel */ 20111da177e4SLinus Torvalds static int 20121da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 20131da177e4SLinus Torvalds { 2014543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 20158e09f215SStefan Weinhuber struct dasd_block *block; 20162dedf0d9SStefan Haberland struct dasd_uid temp_uid; 2017f9f8d02fSStefan Haberland int rc, i; 201833b62a30SStefan Weinhuber int readonly; 20197c8faa86SStefan Haberland unsigned long value; 20201da177e4SLinus Torvalds 2021f1633031SStefan Haberland /* setup work queue for validate server*/ 2022f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 202359a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 202459a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 2025f1633031SStefan Haberland 2026454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 2027454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 2028454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 2029454e1fa1SPeter Oberparleiter return -EIO; 2030454e1fa1SPeter Oberparleiter } 2031454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 2032454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 2033454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 2034454e1fa1SPeter Oberparleiter } 203592636b15SSebastian Ott if (!private) { 203692636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 203792636b15SSebastian Ott if (!private) { 2038fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2039fc19f381SStefan Haberland "Allocating memory for private DASD data " 2040fc19f381SStefan Haberland "failed\n"); 20411da177e4SLinus Torvalds return -ENOMEM; 20421da177e4SLinus Torvalds } 2043543691a4SSebastian Ott device->private = private; 204492636b15SSebastian Ott } else { 204592636b15SSebastian Ott memset(private, 0, sizeof(*private)); 20461da177e4SLinus Torvalds } 20471da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 20481da177e4SLinus Torvalds private->init_cqr_status = -1; 20491da177e4SLinus Torvalds /* Set default cache operations. */ 20501da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 20511da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 20521da177e4SLinus Torvalds 205340545573SHorst Hummel /* Read Configuration Data */ 205440545573SHorst Hummel rc = dasd_eckd_read_conf(device); 205540545573SHorst Hummel if (rc) 20568e09f215SStefan Weinhuber goto out_err1; 205740545573SHorst Hummel 2058a521b048SStefan Haberland /* set some default values */ 20597c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 20601f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 2061a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2062a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 20631f1ee9adSHannes Reinecke 2064*542e30ceSStefan Haberland if (private->conf.gneq) { 20657c8faa86SStefan Haberland value = 1; 2066*542e30ceSStefan Haberland for (i = 0; i < private->conf.gneq->timeout.value; i++) 20677c8faa86SStefan Haberland value = 10 * value; 2068*542e30ceSStefan Haberland value = value * private->conf.gneq->timeout.number; 20697c8faa86SStefan Haberland /* do not accept useless values */ 20707c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 20717c8faa86SStefan Haberland device->default_expires = value; 20727c8faa86SStefan Haberland } 20737c8faa86SStefan Haberland 20742dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 20752dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 20768e09f215SStefan Weinhuber block = dasd_alloc_block(); 20778e09f215SStefan Weinhuber if (IS_ERR(block)) { 2078b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 2079b8ed5dd5SStefan Haberland "could not allocate dasd " 2080b8ed5dd5SStefan Haberland "block structure"); 20818e09f215SStefan Weinhuber rc = PTR_ERR(block); 20828e09f215SStefan Weinhuber goto out_err1; 20838e09f215SStefan Weinhuber } 20848e09f215SStefan Weinhuber device->block = block; 20858e09f215SStefan Weinhuber block->base = device; 20868e09f215SStefan Weinhuber } 20878e09f215SStefan Weinhuber 2088f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 2089f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 2090f9f8d02fSStefan Haberland if (rc) 20918e09f215SStefan Weinhuber goto out_err2; 2092f9f8d02fSStefan Haberland 209312d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 2094f4ac1d02SStefan Weinhuber 2095f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 2096f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 209740545573SHorst Hummel if (rc) 20988e09f215SStefan Weinhuber goto out_err3; 20998e09f215SStefan Weinhuber 210074e2f211SStefan Haberland dasd_eckd_read_fc_security(device); 210119508b20SJan Höppner dasd_path_create_kobjects(device); 210219508b20SJan Höppner 21038e09f215SStefan Weinhuber /* Read Feature Codes */ 210468d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 210540545573SHorst Hummel 2106c729696bSJan Höppner /* Read Volume Information */ 2107dd454839SJan Höppner dasd_eckd_read_vol_info(device); 2108c729696bSJan Höppner 2109c729696bSJan Höppner /* Read Extent Pool Information */ 2110dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 2111c729696bSJan Höppner 21121da177e4SLinus Torvalds /* Read Device Characteristics */ 211368b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 211468b781feSStefan Haberland &private->rdc_data, 64); 21158e09f215SStefan Weinhuber if (rc) { 2116b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2117b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 21188e09f215SStefan Weinhuber goto out_err3; 21198e09f215SStefan Weinhuber } 212034cd551aSStefan Haberland 212134cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 212234cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 212334cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 212434cd551aSStefan Haberland "support raw-track access\n"); 212534cd551aSStefan Haberland rc = -EINVAL; 212634cd551aSStefan Haberland goto out_err3; 212734cd551aSStefan Haberland } 212834cd551aSStefan Haberland 2129817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 2130b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2131b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 2132b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 2133b44b0ab3SStefan Weinhuber else 2134b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 2135b44b0ab3SStefan Weinhuber 2136ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 2137ef19298bSStefan Weinhuber 213833b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 213933b62a30SStefan Weinhuber if (readonly) 214033b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 214133b62a30SStefan Weinhuber 2142fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 214333b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 21441da177e4SLinus Torvalds private->rdc_data.dev_type, 21451da177e4SLinus Torvalds private->rdc_data.dev_model, 21461da177e4SLinus Torvalds private->rdc_data.cu_type, 21471da177e4SLinus Torvalds private->rdc_data.cu_model.model, 2148b44b0ab3SStefan Weinhuber private->real_cyl, 21491da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 215033b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 215133b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 21528e09f215SStefan Weinhuber return 0; 21538e09f215SStefan Weinhuber 21548e09f215SStefan Weinhuber out_err3: 21558e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 21568e09f215SStefan Weinhuber out_err2: 21578e09f215SStefan Weinhuber dasd_free_block(device->block); 21588e09f215SStefan Weinhuber device->block = NULL; 21598e09f215SStefan Weinhuber out_err1: 216000b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 2161ac55ad2bSJan Höppner dasd_path_remove_kobjects(device); 21628e09f215SStefan Weinhuber kfree(device->private); 21638e09f215SStefan Weinhuber device->private = NULL; 21643d052595SHorst Hummel return rc; 21651da177e4SLinus Torvalds } 21661da177e4SLinus Torvalds 21678e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 21688e09f215SStefan Weinhuber { 2169543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21704abb08c2SStefan Weinhuber 21717c6553d4SStefan Haberland if (!private) 21727c6553d4SStefan Haberland return; 21737c6553d4SStefan Haberland 21748e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 2175*542e30ceSStefan Haberland private->conf.ned = NULL; 2176*542e30ceSStefan Haberland private->conf.sneq = NULL; 2177*542e30ceSStefan Haberland private->conf.vdsneq = NULL; 2178*542e30ceSStefan Haberland private->conf.gneq = NULL; 217900b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 2180ac55ad2bSJan Höppner dasd_path_remove_kobjects(device); 21818e09f215SStefan Weinhuber } 21828e09f215SStefan Weinhuber 21831da177e4SLinus Torvalds static struct dasd_ccw_req * 21841da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 21851da177e4SLinus Torvalds { 2186543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21871da177e4SLinus Torvalds struct eckd_count *count_data; 21881da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 21891da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 21901da177e4SLinus Torvalds struct ccw1 *ccw; 21911da177e4SLinus Torvalds int cplength, datasize; 21921da177e4SLinus Torvalds int i; 21931da177e4SLinus Torvalds 21941da177e4SLinus Torvalds cplength = 8; 21951da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2196c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2197c5205f2fSSebastian Ott NULL); 21981da177e4SLinus Torvalds if (IS_ERR(cqr)) 21991da177e4SLinus Torvalds return cqr; 22001da177e4SLinus Torvalds ccw = cqr->cpaddr; 2201ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2202ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 220345f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 22041da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 22051da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 22061da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22071da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 22081da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22091da177e4SLinus Torvalds 22101da177e4SLinus Torvalds count_data = private->count_area; 22111da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22131da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22141da177e4SLinus Torvalds ccw->flags = 0; 22151da177e4SLinus Torvalds ccw->count = 8; 22161da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 22171da177e4SLinus Torvalds ccw++; 22181da177e4SLinus Torvalds count_data++; 22191da177e4SLinus Torvalds } 22201da177e4SLinus Torvalds 2221ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 22221da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2223ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 22241da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22251da177e4SLinus Torvalds /* Read count ccw. */ 22261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22271da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22281da177e4SLinus Torvalds ccw->flags = 0; 22291da177e4SLinus Torvalds ccw->count = 8; 22301da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 22311da177e4SLinus Torvalds 22328e09f215SStefan Weinhuber cqr->block = NULL; 22338e09f215SStefan Weinhuber cqr->startdev = device; 22348e09f215SStefan Weinhuber cqr->memdev = device; 2235eb6e199bSStefan Weinhuber cqr->retries = 255; 22361aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 22371da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 22389e12e54cSJan Höppner /* Set flags to suppress output for expected errors */ 22399e12e54cSJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22409e12e54cSJan Höppner 22411da177e4SLinus Torvalds return cqr; 22421da177e4SLinus Torvalds } 22431da177e4SLinus Torvalds 2244eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2245eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2246eb6e199bSStefan Weinhuber { 2247eb6e199bSStefan Weinhuber char *sense; 2248eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2249eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2250eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2251eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2252eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2253eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2254eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2255eb6e199bSStefan Weinhuber else 2256eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2257eb6e199bSStefan Weinhuber } else 2258eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2259eb6e199bSStefan Weinhuber } 2260eb6e199bSStefan Weinhuber 22611da177e4SLinus Torvalds /* 22621da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 22631da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 22641da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 22651da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 22661da177e4SLinus Torvalds * for deletion in the meantime). 22671da177e4SLinus Torvalds */ 2268eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2269eb6e199bSStefan Weinhuber void *data) 22701da177e4SLinus Torvalds { 2271543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2272543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22731da177e4SLinus Torvalds 2274eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 22751da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 22761da177e4SLinus Torvalds dasd_kick_device(device); 22771da177e4SLinus Torvalds } 22781da177e4SLinus Torvalds 2279eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 22801da177e4SLinus Torvalds { 22811da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 22821da177e4SLinus Torvalds 22838e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 22841da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 22851da177e4SLinus Torvalds return PTR_ERR(init_cqr); 22861da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 22871da177e4SLinus Torvalds init_cqr->callback_data = NULL; 22881da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2289eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2290eb6e199bSStefan Weinhuber * devices as special case 2291eb6e199bSStefan Weinhuber */ 2292eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2293eb6e199bSStefan Weinhuber init_cqr->retries = 0; 22941da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 22951da177e4SLinus Torvalds return -EAGAIN; 22961da177e4SLinus Torvalds } 22971da177e4SLinus Torvalds 2298eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 22991da177e4SLinus Torvalds { 2300543691a4SSebastian Ott struct dasd_device *device = block->base; 2301543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 23021da177e4SLinus Torvalds struct eckd_count *count_area; 23031da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 23041da177e4SLinus Torvalds int status, i; 2305eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 23061da177e4SLinus Torvalds 23071da177e4SLinus Torvalds status = private->init_cqr_status; 23081da177e4SLinus Torvalds private->init_cqr_status = -1; 2309eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2310eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2311eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2312eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2313eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2314eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2315eb6e199bSStefan Weinhuber } 2316eb6e199bSStefan Weinhuber 2317e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2318e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2319e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2320e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2321e4dbb0f2SStefan Haberland goto raw; 2322e4dbb0f2SStefan Haberland } 2323e4dbb0f2SStefan Haberland 2324eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2325eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 23261da177e4SLinus Torvalds return -EMEDIUMTYPE; 2327eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2328eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2329eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2330eb6e199bSStefan Weinhuber "of an I/O error\n"); 2331eb6e199bSStefan Weinhuber return -EIO; 23321da177e4SLinus Torvalds } 23331da177e4SLinus Torvalds 23341da177e4SLinus Torvalds private->uses_cdl = 1; 23351da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 23361da177e4SLinus Torvalds count_area = NULL; 23371da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 23381da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 23393bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 23403bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23413bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23423bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 23431da177e4SLinus Torvalds private->uses_cdl = 0; 23441da177e4SLinus Torvalds break; 23451da177e4SLinus Torvalds } 23461da177e4SLinus Torvalds } 23471da177e4SLinus Torvalds if (i == 3) 2348ce6915f5SJan Höppner count_area = &private->count_area[3]; 23491da177e4SLinus Torvalds 23501da177e4SLinus Torvalds if (private->uses_cdl == 0) { 23511da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 23521da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 23531da177e4SLinus Torvalds (private->count_area[i].dl != 23543bc9fef9SStefan Haberland private->count_area[0].dl) || 23553bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23563bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23573bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 23581da177e4SLinus Torvalds break; 23591da177e4SLinus Torvalds } 23601da177e4SLinus Torvalds if (i == 5) 23611da177e4SLinus Torvalds count_area = &private->count_area[0]; 23621da177e4SLinus Torvalds } else { 23631da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2364fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2365fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 23661da177e4SLinus Torvalds } 2367e4dbb0f2SStefan Haberland 23681da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 23691da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 23701da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 23718e09f215SStefan Weinhuber block->bp_block = count_area->dl; 23721da177e4SLinus Torvalds } 23738e09f215SStefan Weinhuber if (block->bp_block == 0) { 2374fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2375fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 23761da177e4SLinus Torvalds return -EMEDIUMTYPE; 23771da177e4SLinus Torvalds } 23788e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 23798e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 23808e09f215SStefan Weinhuber block->s2b_shift++; 23811da177e4SLinus Torvalds 23828e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2383e4dbb0f2SStefan Haberland 2384e4dbb0f2SStefan Haberland raw: 23852cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 23861da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23871da177e4SLinus Torvalds blk_per_trk); 23881da177e4SLinus Torvalds 2389fc19f381SStefan Haberland dev_info(&device->cdev->dev, 23902cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2391fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 23922cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 23931da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23948e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 23958e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 23961da177e4SLinus Torvalds private->uses_cdl ? 23971da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 23981da177e4SLinus Torvalds 23991da177e4SLinus Torvalds return 0; 24001da177e4SLinus Torvalds } 24011da177e4SLinus Torvalds 24028e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 24031da177e4SLinus Torvalds { 2404543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24051da177e4SLinus Torvalds 24061da177e4SLinus Torvalds if (private->init_cqr_status < 0) 24078e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 24081da177e4SLinus Torvalds else 24098e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 24101da177e4SLinus Torvalds } 24111da177e4SLinus Torvalds 2412d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 24138e09f215SStefan Weinhuber { 24148e09f215SStefan Weinhuber return dasd_alias_add_device(device); 24158e09f215SStefan Weinhuber }; 24168e09f215SStefan Weinhuber 24178e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 24188e09f215SStefan Weinhuber { 2419669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2420669f3765SStefan Haberland dasd_put_device(device); 2421669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2422669f3765SStefan Haberland dasd_put_device(device); 2423669f3765SStefan Haberland 2424d42e1712SStefan Haberland return 0; 2425d42e1712SStefan Haberland }; 2426d42e1712SStefan Haberland 2427daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2428d42e1712SStefan Haberland { 24298e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 24308e09f215SStefan Weinhuber }; 24318e09f215SStefan Weinhuber 24321da177e4SLinus Torvalds static int 24338e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 24341da177e4SLinus Torvalds { 2435543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24361da177e4SLinus Torvalds 24378e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 24381da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 24398e09f215SStefan Weinhuber 0, block->bp_block); 24401da177e4SLinus Torvalds } 24411da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 24421da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 24431da177e4SLinus Torvalds return 0; 24441da177e4SLinus Torvalds } 24451da177e4SLinus Torvalds 24468fd57520SJan Höppner /* 24478fd57520SJan Höppner * Build the TCW request for the format check 24488fd57520SJan Höppner */ 24498fd57520SJan Höppner static struct dasd_ccw_req * 24508fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 24518fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 24528fd57520SJan Höppner int rpt) 24538fd57520SJan Höppner { 24548fd57520SJan Höppner struct dasd_eckd_private *start_priv; 24558fd57520SJan Höppner struct dasd_device *startdev = NULL; 24568fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 24578fd57520SJan Höppner struct dasd_ccw_req *cqr; 24588fd57520SJan Höppner struct itcw *itcw; 24598fd57520SJan Höppner int itcw_size; 24608fd57520SJan Höppner int count; 24618fd57520SJan Höppner int rc; 24628fd57520SJan Höppner int i; 24638fd57520SJan Höppner 24648fd57520SJan Höppner if (enable_pav) 24658fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 24668fd57520SJan Höppner 24678fd57520SJan Höppner if (!startdev) 24688fd57520SJan Höppner startdev = base; 24698fd57520SJan Höppner 24708fd57520SJan Höppner start_priv = startdev->private; 24718fd57520SJan Höppner 24728fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24738fd57520SJan Höppner 24748fd57520SJan Höppner /* 24758fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 24768fd57520SJan Höppner * calculate the corresponding itcw_size 24778fd57520SJan Höppner */ 24788fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 24798fd57520SJan Höppner 24805e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 24818fd57520SJan Höppner if (IS_ERR(cqr)) 24828fd57520SJan Höppner return cqr; 24838fd57520SJan Höppner 24848fd57520SJan Höppner start_priv->count++; 24858fd57520SJan Höppner 24868fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 24878fd57520SJan Höppner if (IS_ERR(itcw)) { 24888fd57520SJan Höppner rc = -EINVAL; 24898fd57520SJan Höppner goto out_err; 24908fd57520SJan Höppner } 24918fd57520SJan Höppner 24928fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 24938fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 24948fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 24958fd57520SJan Höppner sizeof(struct eckd_count), 24968fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 24978fd57520SJan Höppner if (rc) 24988fd57520SJan Höppner goto out_err; 24998fd57520SJan Höppner 25008fd57520SJan Höppner for (i = 0; i < count; i++) { 25018fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 25028fd57520SJan Höppner sizeof(struct eckd_count)); 25038fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 25048fd57520SJan Höppner rc = -EINVAL; 25058fd57520SJan Höppner goto out_err; 25068fd57520SJan Höppner } 25078fd57520SJan Höppner } 25088fd57520SJan Höppner 25098fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 25108fd57520SJan Höppner itcw_finalize(itcw); 25118fd57520SJan Höppner 25128fd57520SJan Höppner cqr->cpmode = 1; 25138fd57520SJan Höppner cqr->startdev = startdev; 25148fd57520SJan Höppner cqr->memdev = startdev; 25158fd57520SJan Höppner cqr->basedev = base; 25168fd57520SJan Höppner cqr->retries = startdev->default_retries; 25178fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 25188fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 25198fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 25208fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 25218fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 25228fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 25238fd57520SJan Höppner 25248fd57520SJan Höppner return cqr; 25258fd57520SJan Höppner 25268fd57520SJan Höppner out_err: 25278fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 25288fd57520SJan Höppner 25298fd57520SJan Höppner return ERR_PTR(rc); 25308fd57520SJan Höppner } 25318fd57520SJan Höppner 25328fd57520SJan Höppner /* 25338fd57520SJan Höppner * Build the CCW request for the format check 25348fd57520SJan Höppner */ 25358fd57520SJan Höppner static struct dasd_ccw_req * 25368fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 25378fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 25388fd57520SJan Höppner { 25398fd57520SJan Höppner struct dasd_eckd_private *start_priv; 25408fd57520SJan Höppner struct dasd_eckd_private *base_priv; 25418fd57520SJan Höppner struct dasd_device *startdev = NULL; 25428fd57520SJan Höppner struct dasd_ccw_req *cqr; 25438fd57520SJan Höppner struct ccw1 *ccw; 25448fd57520SJan Höppner void *data; 25458fd57520SJan Höppner int cplength, datasize; 25468fd57520SJan Höppner int use_prefix; 25478fd57520SJan Höppner int count; 25488fd57520SJan Höppner int i; 25498fd57520SJan Höppner 25508fd57520SJan Höppner if (enable_pav) 25518fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 25528fd57520SJan Höppner 25538fd57520SJan Höppner if (!startdev) 25548fd57520SJan Höppner startdev = base; 25558fd57520SJan Höppner 25568fd57520SJan Höppner start_priv = startdev->private; 25578fd57520SJan Höppner base_priv = base->private; 25588fd57520SJan Höppner 25598fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 25608fd57520SJan Höppner 25618fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 25628fd57520SJan Höppner 25638fd57520SJan Höppner if (use_prefix) { 25648fd57520SJan Höppner cplength = 1; 25658fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 25668fd57520SJan Höppner } else { 25678fd57520SJan Höppner cplength = 2; 25688fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 25698fd57520SJan Höppner sizeof(struct LO_eckd_data); 25708fd57520SJan Höppner } 25718fd57520SJan Höppner cplength += count; 25728fd57520SJan Höppner 25735e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 25748fd57520SJan Höppner if (IS_ERR(cqr)) 25758fd57520SJan Höppner return cqr; 25768fd57520SJan Höppner 25778fd57520SJan Höppner start_priv->count++; 25788fd57520SJan Höppner data = cqr->data; 25798fd57520SJan Höppner ccw = cqr->cpaddr; 25808fd57520SJan Höppner 25818fd57520SJan Höppner if (use_prefix) { 25828fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 25838fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 25848fd57520SJan Höppner count, 0, 0); 25858fd57520SJan Höppner } else { 25868fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 258745f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 25888fd57520SJan Höppner 25898fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 25908fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25918fd57520SJan Höppner 25928fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 25938fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 25948fd57520SJan Höppner } 25958fd57520SJan Höppner 25968fd57520SJan Höppner for (i = 0; i < count; i++) { 25978fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25988fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 25998fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 26008fd57520SJan Höppner ccw->count = 8; 26018fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 26028fd57520SJan Höppner ccw++; 26038fd57520SJan Höppner fmt_buffer++; 26048fd57520SJan Höppner } 26058fd57520SJan Höppner 26068fd57520SJan Höppner cqr->startdev = startdev; 26078fd57520SJan Höppner cqr->memdev = startdev; 26088fd57520SJan Höppner cqr->basedev = base; 26098fd57520SJan Höppner cqr->retries = DASD_RETRIES; 26108fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 26118fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 26128fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 26138fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 26148fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 26158fd57520SJan Höppner 26168fd57520SJan Höppner return cqr; 26178fd57520SJan Höppner } 26188fd57520SJan Höppner 26191da177e4SLinus Torvalds static struct dasd_ccw_req * 26205e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 26215e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 26221da177e4SLinus Torvalds { 2623d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2624d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 26251da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 26261da177e4SLinus Torvalds struct eckd_count *ect; 2627d42e1712SStefan Haberland struct ch_t address; 26281da177e4SLinus Torvalds struct ccw1 *ccw; 26291da177e4SLinus Torvalds void *data; 2630b44b0ab3SStefan Weinhuber int rpt; 26311da177e4SLinus Torvalds int cplength, datasize; 2632d42e1712SStefan Haberland int i, j; 2633f9a28f7bSJean-Baptiste Joret int intensity = 0; 2634f9a28f7bSJean-Baptiste Joret int r0_perm; 2635d42e1712SStefan Haberland int nr_tracks; 263618d6624eSStefan Haberland int use_prefix; 26371da177e4SLinus Torvalds 2638a94fa154SStefan Haberland if (enable_pav) 2639d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 264029b8dd9dSStefan Haberland 2641d42e1712SStefan Haberland if (!startdev) 2642d42e1712SStefan Haberland startdev = base; 26431da177e4SLinus Torvalds 2644543691a4SSebastian Ott start_priv = startdev->private; 2645543691a4SSebastian Ott base_priv = base->private; 2646d42e1712SStefan Haberland 2647d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2648d42e1712SStefan Haberland 2649d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 26501da177e4SLinus Torvalds 26511da177e4SLinus Torvalds /* 26521da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 26531da177e4SLinus Torvalds * Bit 0: write record zero 26541da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 26551da177e4SLinus Torvalds * Bit 2: invalidate tracks 26561da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2657f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 26581da177e4SLinus Torvalds * Only some bit combinations do make sense. 26591da177e4SLinus Torvalds */ 2660f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2661f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2662f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2663f9a28f7bSJean-Baptiste Joret } else { 2664f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2665f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2666f9a28f7bSJean-Baptiste Joret } 2667d42e1712SStefan Haberland 266818d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 266918d6624eSStefan Haberland 2670f9a28f7bSJean-Baptiste Joret switch (intensity) { 26711da177e4SLinus Torvalds case 0x00: /* Normal format */ 26721da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2673d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 267418d6624eSStefan Haberland if (use_prefix) 2675d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26761da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2677d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 267818d6624eSStefan Haberland else 267918d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 268018d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 268118d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26821da177e4SLinus Torvalds break; 26831da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 26841da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2685d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 268618d6624eSStefan Haberland if (use_prefix) 2687d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26881da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26891da177e4SLinus Torvalds sizeof(struct eckd_count) + 2690d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 269118d6624eSStefan Haberland else 269218d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 269318d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 269418d6624eSStefan Haberland sizeof(struct eckd_count) + 269518d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26961da177e4SLinus Torvalds break; 26971da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 26981da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 26991da177e4SLinus Torvalds cplength = 3; 270018d6624eSStefan Haberland if (use_prefix) 2701d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27021da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 27031da177e4SLinus Torvalds sizeof(struct eckd_count); 270418d6624eSStefan Haberland else 270518d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 270618d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 270718d6624eSStefan Haberland sizeof(struct eckd_count); 27081da177e4SLinus Torvalds break; 27091da177e4SLinus Torvalds default: 2710d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2711d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2712d42e1712SStefan Haberland fdata->intensity); 27131da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 27141da177e4SLinus Torvalds } 27155e2b17e7SJan Höppner 27165e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 27171da177e4SLinus Torvalds if (IS_ERR(fcp)) 27181da177e4SLinus Torvalds return fcp; 27191da177e4SLinus Torvalds 2720d42e1712SStefan Haberland start_priv->count++; 27211da177e4SLinus Torvalds data = fcp->data; 27221da177e4SLinus Torvalds ccw = fcp->cpaddr; 27231da177e4SLinus Torvalds 2724f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 27251da177e4SLinus Torvalds case 0x00: /* Normal format. */ 272618d6624eSStefan Haberland if (use_prefix) { 2727d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2728d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2729d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2730f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2731f9a28f7bSJean-Baptiste Joret if (r0_perm) 2732d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2733d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2734d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 273518d6624eSStefan Haberland } else { 273618d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 273718d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 273845f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 273918d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 274018d6624eSStefan Haberland if (r0_perm) 274118d6624eSStefan Haberland ((struct DE_eckd_data *) data) 274218d6624eSStefan Haberland ->ga_extended |= 0x04; 274318d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 274418d6624eSStefan Haberland } 27451da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27461da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2747d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2748d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 27491da177e4SLinus Torvalds fdata->blksize); 27501da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27511da177e4SLinus Torvalds break; 27521da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 275318d6624eSStefan Haberland if (use_prefix) { 2754d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2755d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 27561da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2757d42e1712SStefan Haberland base, startdev); 2758d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 275918d6624eSStefan Haberland } else { 276018d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 276118d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 276245f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 276318d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 276418d6624eSStefan Haberland } 27651da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27661da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2767d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2768d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2769d42e1712SStefan Haberland base->block->bp_block); 27701da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27711da177e4SLinus Torvalds break; 27721da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 277318d6624eSStefan Haberland if (use_prefix) { 2774d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2775d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2776d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2777d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 277818d6624eSStefan Haberland } else { 277918d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 278018d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 278145f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 278218d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 278318d6624eSStefan Haberland } 27841da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27851da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 27861da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2787d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 27881da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27891da177e4SLinus Torvalds break; 27901da177e4SLinus Torvalds } 2791d42e1712SStefan Haberland 2792d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2793d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2794d42e1712SStefan Haberland set_ch_t(&address, 2795d42e1712SStefan Haberland (fdata->start_unit + j) / 2796d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2797d42e1712SStefan Haberland (fdata->start_unit + j) % 2798d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2799f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 28001da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28011da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2802b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2803b44b0ab3SStefan Weinhuber ect->head = address.head; 28041da177e4SLinus Torvalds ect->record = 0; 28051da177e4SLinus Torvalds ect->kl = 0; 28061da177e4SLinus Torvalds ect->dl = 8; 28071da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28081da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 28091da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28101da177e4SLinus Torvalds ccw->count = 8; 28111da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28121da177e4SLinus Torvalds ccw++; 28131da177e4SLinus Torvalds } 2814f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 28151da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28161da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2817b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2818b44b0ab3SStefan Weinhuber ect->head = address.head; 28191da177e4SLinus Torvalds ect->record = 1; 28201da177e4SLinus Torvalds ect->kl = 0; 28211da177e4SLinus Torvalds ect->dl = 0; 28221da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28231da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 28241da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28251da177e4SLinus Torvalds ccw->count = 8; 28261da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28271da177e4SLinus Torvalds } else { /* write remaining records */ 28281da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 28291da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28301da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2831b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2832b44b0ab3SStefan Weinhuber ect->head = address.head; 28331da177e4SLinus Torvalds ect->record = i + 1; 28341da177e4SLinus Torvalds ect->kl = 0; 28351da177e4SLinus Torvalds ect->dl = fdata->blksize; 2836d42e1712SStefan Haberland /* 2837d42e1712SStefan Haberland * Check for special tracks 0-1 2838d42e1712SStefan Haberland * when formatting CDL 2839d42e1712SStefan Haberland */ 2840f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 284146d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 28421da177e4SLinus Torvalds if (i < 3) { 28431da177e4SLinus Torvalds ect->kl = 4; 28441da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 28451da177e4SLinus Torvalds } 28461da177e4SLinus Torvalds } 2847f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 284846d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 28491da177e4SLinus Torvalds ect->kl = 44; 28501da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 28511da177e4SLinus Torvalds } 28521da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2853d42e1712SStefan Haberland if (i != 0 || j == 0) 2854d42e1712SStefan Haberland ccw->cmd_code = 2855d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2856d42e1712SStefan Haberland else 2857d42e1712SStefan Haberland ccw->cmd_code = 2858d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 28591da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28601da177e4SLinus Torvalds ccw->count = 8; 28611da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28621da177e4SLinus Torvalds ccw++; 28631da177e4SLinus Torvalds } 28641da177e4SLinus Torvalds } 2865d42e1712SStefan Haberland } 2866d42e1712SStefan Haberland 2867d42e1712SStefan Haberland fcp->startdev = startdev; 2868d42e1712SStefan Haberland fcp->memdev = startdev; 286929b8dd9dSStefan Haberland fcp->basedev = base; 2870eb6e199bSStefan Weinhuber fcp->retries = 256; 2871d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 28721aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 28731da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2874d42e1712SStefan Haberland 28751da177e4SLinus Torvalds return fcp; 28761da177e4SLinus Torvalds } 28771da177e4SLinus Torvalds 2878570d237cSJan Höppner /* 2879570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2880570d237cSJan Höppner */ 2881570d237cSJan Höppner static struct dasd_ccw_req * 2882570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 28838fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 28848fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2885d42e1712SStefan Haberland { 28868fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 28878fd57520SJan Höppner 28888fd57520SJan Höppner if (!fmt_buffer) { 28895e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 28908fd57520SJan Höppner } else { 28918fd57520SJan Höppner if (tpm) 28928fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 28938fd57520SJan Höppner enable_pav, 28948fd57520SJan Höppner fmt_buffer, rpt); 28958fd57520SJan Höppner else 28968fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 28978fd57520SJan Höppner fmt_buffer, rpt); 28988fd57520SJan Höppner } 28998fd57520SJan Höppner 29008fd57520SJan Höppner return ccw_req; 2901570d237cSJan Höppner } 2902570d237cSJan Höppner 2903570d237cSJan Höppner /* 2904570d237cSJan Höppner * Sanity checks on format_data 2905570d237cSJan Höppner */ 2906570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2907570d237cSJan Höppner struct format_data_t *fdata) 2908570d237cSJan Höppner { 2909543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2910d42e1712SStefan Haberland 2911d42e1712SStefan Haberland if (fdata->start_unit >= 2912d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2913d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2914d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2915d42e1712SStefan Haberland fdata->start_unit); 2916d42e1712SStefan Haberland return -EINVAL; 2917d42e1712SStefan Haberland } 2918d42e1712SStefan Haberland if (fdata->stop_unit >= 2919d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2920d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2921d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2922d42e1712SStefan Haberland fdata->stop_unit); 2923d42e1712SStefan Haberland return -EINVAL; 2924d42e1712SStefan Haberland } 2925d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2926d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2927d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2928d42e1712SStefan Haberland fdata->start_unit); 2929d42e1712SStefan Haberland return -EINVAL; 2930d42e1712SStefan Haberland } 2931d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2932d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2933d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2934d42e1712SStefan Haberland fdata->blksize); 2935d42e1712SStefan Haberland return -EINVAL; 2936d42e1712SStefan Haberland } 2937570d237cSJan Höppner return 0; 2938570d237cSJan Höppner } 2939570d237cSJan Höppner 2940570d237cSJan Höppner /* 2941570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2942570d237cSJan Höppner */ 2943570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2944570d237cSJan Höppner struct format_data_t *fdata, 29458fd57520SJan Höppner int enable_pav, int tpm, 29468fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 29478fd57520SJan Höppner struct irb *irb) 2948570d237cSJan Höppner { 2949543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2950570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2951570d237cSJan Höppner struct list_head format_queue; 2952570d237cSJan Höppner struct dasd_device *device; 29538fd57520SJan Höppner char *sense = NULL; 2954570d237cSJan Höppner int old_start, old_stop, format_step; 2955570d237cSJan Höppner int step, retry; 2956570d237cSJan Höppner int rc; 2957570d237cSJan Höppner 2958570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2959570d237cSJan Höppner if (rc) 2960570d237cSJan Höppner return rc; 2961d42e1712SStefan Haberland 2962d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2963d42e1712SStefan Haberland 296446d1c03cSJan Höppner old_start = fdata->start_unit; 296529b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2966d42e1712SStefan Haberland 29678fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 29688fd57520SJan Höppner /* Command Mode / Format Check */ 29698fd57520SJan Höppner format_step = 1; 29708fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 29718fd57520SJan Höppner /* Transport Mode / Format Check */ 29728fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 29738fd57520SJan Höppner } else { 29748fd57520SJan Höppner /* Normal Formatting */ 29758fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 29768fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 29778fd57520SJan Höppner } 29788fd57520SJan Höppner 297946d1c03cSJan Höppner do { 298046d1c03cSJan Höppner retry = 0; 2981d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2982d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 298346d1c03cSJan Höppner if (step > format_step) { 298446d1c03cSJan Höppner fdata->stop_unit = 298546d1c03cSJan Höppner fdata->start_unit + format_step - 1; 298646d1c03cSJan Höppner } 2987d42e1712SStefan Haberland 2988570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 29898fd57520SJan Höppner enable_pav, tpm, 29908fd57520SJan Höppner fmt_buffer, rpt); 2991d42e1712SStefan Haberland if (IS_ERR(cqr)) { 299246d1c03cSJan Höppner rc = PTR_ERR(cqr); 299346d1c03cSJan Höppner if (rc == -ENOMEM) { 299446d1c03cSJan Höppner if (list_empty(&format_queue)) 299546d1c03cSJan Höppner goto out; 2996d42e1712SStefan Haberland /* 299746d1c03cSJan Höppner * not enough memory available, start 299846d1c03cSJan Höppner * requests retry after first requests 299946d1c03cSJan Höppner * were finished 3000d42e1712SStefan Haberland */ 300146d1c03cSJan Höppner retry = 1; 300246d1c03cSJan Höppner break; 3003d42e1712SStefan Haberland } 300446d1c03cSJan Höppner goto out_err; 300546d1c03cSJan Höppner } 300646d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 3007d42e1712SStefan Haberland 30088fd57520SJan Höppner if (fmt_buffer) { 30098fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 30108fd57520SJan Höppner fmt_buffer += rpt * step; 30118fd57520SJan Höppner } 3012d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 3013d42e1712SStefan Haberland fdata->stop_unit = old_stop; 3014d42e1712SStefan Haberland } 3015d42e1712SStefan Haberland 301646d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 3017d42e1712SStefan Haberland 301846d1c03cSJan Höppner out_err: 3019d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 3020d42e1712SStefan Haberland device = cqr->startdev; 3021543691a4SSebastian Ott private = device->private; 30228fd57520SJan Höppner 30238fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 30248fd57520SJan Höppner /* 30258fd57520SJan Höppner * Only get sense data if called by format 30268fd57520SJan Höppner * check 30278fd57520SJan Höppner */ 30288fd57520SJan Höppner if (fmt_buffer && irb) { 30298fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 30308fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 30318fd57520SJan Höppner } 3032d42e1712SStefan Haberland rc = -EIO; 30338fd57520SJan Höppner } 3034d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 30355e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 3036d42e1712SStefan Haberland private->count--; 3037d42e1712SStefan Haberland } 3038d42e1712SStefan Haberland 30398fd57520SJan Höppner if (rc && rc != -EIO) 304046d1c03cSJan Höppner goto out; 30418fd57520SJan Höppner if (rc == -EIO) { 30428fd57520SJan Höppner /* 30438fd57520SJan Höppner * In case fewer than the expected records are on the 30448fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 30458fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 30468fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 30478fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 30488fd57520SJan Höppner * and continue. 30498fd57520SJan Höppner */ 30508fd57520SJan Höppner if (sense && 30518fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 30528fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 30538fd57520SJan Höppner retry = 1; 30548fd57520SJan Höppner else 30558fd57520SJan Höppner goto out; 30568fd57520SJan Höppner } 305729b8dd9dSStefan Haberland 305846d1c03cSJan Höppner } while (retry); 305946d1c03cSJan Höppner 306046d1c03cSJan Höppner out: 306146d1c03cSJan Höppner fdata->start_unit = old_start; 306246d1c03cSJan Höppner fdata->stop_unit = old_stop; 3063d42e1712SStefan Haberland 3064d42e1712SStefan Haberland return rc; 3065d42e1712SStefan Haberland } 3066d42e1712SStefan Haberland 3067570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 3068570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 3069570d237cSJan Höppner { 30708fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 30718fd57520SJan Höppner 0, NULL); 30728fd57520SJan Höppner } 30738fd57520SJan Höppner 30745e6bdd37SStefan Haberland static bool test_and_set_format_track(struct dasd_format_entry *to_format, 30755e6bdd37SStefan Haberland struct dasd_block *block) 30765e6bdd37SStefan Haberland { 30775e6bdd37SStefan Haberland struct dasd_format_entry *format; 30785e6bdd37SStefan Haberland unsigned long flags; 30795e6bdd37SStefan Haberland bool rc = false; 30805e6bdd37SStefan Haberland 30815e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 30825e6bdd37SStefan Haberland list_for_each_entry(format, &block->format_list, list) { 30835e6bdd37SStefan Haberland if (format->track == to_format->track) { 30845e6bdd37SStefan Haberland rc = true; 30855e6bdd37SStefan Haberland goto out; 30865e6bdd37SStefan Haberland } 30875e6bdd37SStefan Haberland } 30885e6bdd37SStefan Haberland list_add_tail(&to_format->list, &block->format_list); 30895e6bdd37SStefan Haberland 30905e6bdd37SStefan Haberland out: 30915e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 30925e6bdd37SStefan Haberland return rc; 30935e6bdd37SStefan Haberland } 30945e6bdd37SStefan Haberland 30955e6bdd37SStefan Haberland static void clear_format_track(struct dasd_format_entry *format, 30965e6bdd37SStefan Haberland struct dasd_block *block) 30975e6bdd37SStefan Haberland { 30985e6bdd37SStefan Haberland unsigned long flags; 30995e6bdd37SStefan Haberland 31005e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 31015e6bdd37SStefan Haberland list_del_init(&format->list); 31025e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 31035e6bdd37SStefan Haberland } 31045e6bdd37SStefan Haberland 31058fd57520SJan Höppner /* 31065e2b17e7SJan Höppner * Callback function to free ESE format requests. 31075e2b17e7SJan Höppner */ 31085e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 31095e2b17e7SJan Höppner { 31105e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 31115e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 31125e6bdd37SStefan Haberland struct dasd_format_entry *format = data; 31135e2b17e7SJan Höppner 31145e6bdd37SStefan Haberland clear_format_track(format, cqr->basedev->block); 31155e2b17e7SJan Höppner private->count--; 31165e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 31175e2b17e7SJan Höppner } 31185e2b17e7SJan Höppner 31195e2b17e7SJan Höppner static struct dasd_ccw_req * 31205e6bdd37SStefan Haberland dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 31215e6bdd37SStefan Haberland struct irb *irb) 31225e2b17e7SJan Höppner { 31235e2b17e7SJan Höppner struct dasd_eckd_private *private; 31245e6bdd37SStefan Haberland struct dasd_format_entry *format; 31255e2b17e7SJan Höppner struct format_data_t fdata; 31265e2b17e7SJan Höppner unsigned int recs_per_trk; 31275e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 31285e2b17e7SJan Höppner struct dasd_device *base; 31295e2b17e7SJan Höppner struct dasd_block *block; 31305e2b17e7SJan Höppner unsigned int blksize; 31315e2b17e7SJan Höppner struct request *req; 31325e2b17e7SJan Höppner sector_t first_trk; 31335e2b17e7SJan Höppner sector_t last_trk; 31345e6bdd37SStefan Haberland sector_t curr_trk; 31355e2b17e7SJan Höppner int rc; 31365e2b17e7SJan Höppner 31375e2b17e7SJan Höppner req = cqr->callback_data; 31385e6bdd37SStefan Haberland block = cqr->block; 31395e6bdd37SStefan Haberland base = block->base; 31405e2b17e7SJan Höppner private = base->private; 31415e2b17e7SJan Höppner blksize = block->bp_block; 31425e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 31435e6bdd37SStefan Haberland format = &startdev->format_entry; 31445e2b17e7SJan Höppner 31455e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 31465e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 31475e2b17e7SJan Höppner last_trk = 31485e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 31495e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 31505e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 31515e6bdd37SStefan Haberland if (rc) 31525e6bdd37SStefan Haberland return ERR_PTR(rc); 31535e2b17e7SJan Höppner 31545e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 31555e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, startdev, 31565e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 31575e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 31585e6bdd37SStefan Haberland return ERR_PTR(-EINVAL); 31595e6bdd37SStefan Haberland } 31605e6bdd37SStefan Haberland format->track = curr_trk; 31615e6bdd37SStefan Haberland /* test if track is already in formatting by another thread */ 31625e6bdd37SStefan Haberland if (test_and_set_format_track(format, block)) 31635e6bdd37SStefan Haberland return ERR_PTR(-EEXIST); 31645e6bdd37SStefan Haberland 31655e6bdd37SStefan Haberland fdata.start_unit = curr_trk; 31665e6bdd37SStefan Haberland fdata.stop_unit = curr_trk; 31675e2b17e7SJan Höppner fdata.blksize = blksize; 31685e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 31695e2b17e7SJan Höppner 31705e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 31715e2b17e7SJan Höppner if (rc) 31725e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 31735e2b17e7SJan Höppner 31745e2b17e7SJan Höppner /* 31755e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 31765e2b17e7SJan Höppner * the former startdev. 31775e2b17e7SJan Höppner */ 31785e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 31795e2b17e7SJan Höppner if (IS_ERR(fcqr)) 31805e2b17e7SJan Höppner return fcqr; 31815e2b17e7SJan Höppner 31825e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 31835e6bdd37SStefan Haberland fcqr->callback_data = (void *) format; 31845e2b17e7SJan Höppner 31855e2b17e7SJan Höppner return fcqr; 31865e2b17e7SJan Höppner } 31875e2b17e7SJan Höppner 31885e2b17e7SJan Höppner /* 31895e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 31905e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 31915e6bdd37SStefan Haberland * 31925e6bdd37SStefan Haberland * The first unformatted track is the one that got the NRF error, the address is 31935e6bdd37SStefan Haberland * encoded in the sense data. 31945e6bdd37SStefan Haberland * 31955e6bdd37SStefan Haberland * All tracks before have returned valid data and should not be touched. 31965e6bdd37SStefan Haberland * All tracks after the unformatted track might be formatted or not. This is 31975e6bdd37SStefan Haberland * currently not known, remember the processed data and return the remainder of 31985e6bdd37SStefan Haberland * the request to the blocklayer in __dasd_cleanup_cqr(). 31995e2b17e7SJan Höppner */ 32005e6bdd37SStefan Haberland static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 32015e2b17e7SJan Höppner { 32025e6bdd37SStefan Haberland struct dasd_eckd_private *private; 32035e6bdd37SStefan Haberland sector_t first_trk, last_trk; 32045e6bdd37SStefan Haberland sector_t first_blk, last_blk; 32055e2b17e7SJan Höppner unsigned int blksize, off; 32065e6bdd37SStefan Haberland unsigned int recs_per_trk; 32075e2b17e7SJan Höppner struct dasd_device *base; 32085e2b17e7SJan Höppner struct req_iterator iter; 32095e6bdd37SStefan Haberland struct dasd_block *block; 32105e6bdd37SStefan Haberland unsigned int skip_block; 32115e6bdd37SStefan Haberland unsigned int blk_count; 32125e2b17e7SJan Höppner struct request *req; 32135e2b17e7SJan Höppner struct bio_vec bv; 32145e6bdd37SStefan Haberland sector_t curr_trk; 32155e6bdd37SStefan Haberland sector_t end_blk; 32165e2b17e7SJan Höppner char *dst; 32175e6bdd37SStefan Haberland int rc; 32185e2b17e7SJan Höppner 32195e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 32205e2b17e7SJan Höppner base = cqr->block->base; 32215e2b17e7SJan Höppner blksize = base->block->bp_block; 32225e6bdd37SStefan Haberland block = cqr->block; 32235e6bdd37SStefan Haberland private = base->private; 32245e6bdd37SStefan Haberland skip_block = 0; 32255e6bdd37SStefan Haberland blk_count = 0; 32265e6bdd37SStefan Haberland 32275e6bdd37SStefan Haberland recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32285e6bdd37SStefan Haberland first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 32295e6bdd37SStefan Haberland sector_div(first_trk, recs_per_trk); 32305e6bdd37SStefan Haberland last_trk = last_blk = 32315e6bdd37SStefan Haberland (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 32325e6bdd37SStefan Haberland sector_div(last_trk, recs_per_trk); 32335e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 32345e6bdd37SStefan Haberland if (rc) 32355e6bdd37SStefan Haberland return rc; 32365e6bdd37SStefan Haberland 32375e6bdd37SStefan Haberland /* sanity check if the current track from sense data is valid */ 32385e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 32395e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, base, 32405e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 32415e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 32425e6bdd37SStefan Haberland return -EINVAL; 32435e6bdd37SStefan Haberland } 32445e6bdd37SStefan Haberland 32455e6bdd37SStefan Haberland /* 32465e6bdd37SStefan Haberland * if not the first track got the NRF error we have to skip over valid 32475e6bdd37SStefan Haberland * blocks 32485e6bdd37SStefan Haberland */ 32495e6bdd37SStefan Haberland if (curr_trk != first_trk) 32505e6bdd37SStefan Haberland skip_block = curr_trk * recs_per_trk - first_blk; 32515e6bdd37SStefan Haberland 32525e6bdd37SStefan Haberland /* we have no information beyond the current track */ 32535e6bdd37SStefan Haberland end_blk = (curr_trk + 1) * recs_per_trk; 32545e2b17e7SJan Höppner 32555e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 3256bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 32575e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 32585e6bdd37SStefan Haberland if (first_blk + blk_count >= end_blk) { 32595e6bdd37SStefan Haberland cqr->proc_bytes = blk_count * blksize; 32605e6bdd37SStefan Haberland return 0; 32615e6bdd37SStefan Haberland } 32625e6bdd37SStefan Haberland if (dst && !skip_block) { 32635e2b17e7SJan Höppner dst += off; 32645e2b17e7SJan Höppner memset(dst, 0, blksize); 32655e6bdd37SStefan Haberland } else { 32665e6bdd37SStefan Haberland skip_block--; 32675e6bdd37SStefan Haberland } 32685e6bdd37SStefan Haberland blk_count++; 32695e2b17e7SJan Höppner } 32705e2b17e7SJan Höppner } 32715e6bdd37SStefan Haberland return 0; 32725e2b17e7SJan Höppner } 32735e2b17e7SJan Höppner 32745e2b17e7SJan Höppner /* 32758fd57520SJan Höppner * Helper function to count consecutive records of a single track. 32768fd57520SJan Höppner */ 32778fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 32788fd57520SJan Höppner int max) 32798fd57520SJan Höppner { 32808fd57520SJan Höppner int head; 32818fd57520SJan Höppner int i; 32828fd57520SJan Höppner 32838fd57520SJan Höppner head = fmt_buffer[start].head; 32848fd57520SJan Höppner 32858fd57520SJan Höppner /* 32868fd57520SJan Höppner * There are 3 conditions where we stop counting: 32878fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 32888fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 32898fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 32908fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 32918fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 32928fd57520SJan Höppner * record will be 0 then) 32938fd57520SJan Höppner */ 32948fd57520SJan Höppner for (i = start; i < max; i++) { 32958fd57520SJan Höppner if (i > start) { 32968fd57520SJan Höppner if ((fmt_buffer[i].head == head && 32978fd57520SJan Höppner fmt_buffer[i].record == 1) || 32988fd57520SJan Höppner fmt_buffer[i].head != head || 32998fd57520SJan Höppner fmt_buffer[i].record == 0) 33008fd57520SJan Höppner break; 33018fd57520SJan Höppner } 33028fd57520SJan Höppner } 33038fd57520SJan Höppner 33048fd57520SJan Höppner return i - start; 33058fd57520SJan Höppner } 33068fd57520SJan Höppner 33078fd57520SJan Höppner /* 33088fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 33098fd57520SJan Höppner * record ids, and key length are compared with expected data. 33108fd57520SJan Höppner * 33118fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 33128fd57520SJan Höppner * additional information, depending on the error. 33138fd57520SJan Höppner */ 33148fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 33158fd57520SJan Höppner struct format_check_t *cdata, 33168fd57520SJan Höppner int rpt_max, int rpt_exp, 33178fd57520SJan Höppner int trk_per_cyl, int tpm) 33188fd57520SJan Höppner { 33198fd57520SJan Höppner struct ch_t geo; 33208fd57520SJan Höppner int max_entries; 33218fd57520SJan Höppner int count = 0; 33228fd57520SJan Höppner int trkcount; 33238fd57520SJan Höppner int blksize; 33248fd57520SJan Höppner int pos = 0; 33258fd57520SJan Höppner int i, j; 33268fd57520SJan Höppner int kl; 33278fd57520SJan Höppner 33288fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 33298fd57520SJan Höppner max_entries = trkcount * rpt_max; 33308fd57520SJan Höppner 33318fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 33328fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 33338fd57520SJan Höppner if (tpm) { 33348fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 33358fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 33368fd57520SJan Höppner if (pos++ > max_entries) 33378fd57520SJan Höppner break; 33388fd57520SJan Höppner } 33398fd57520SJan Höppner } else { 33408fd57520SJan Höppner if (i != cdata->expect.start_unit) 33418fd57520SJan Höppner pos += rpt_max - count; 33428fd57520SJan Höppner } 33438fd57520SJan Höppner 33448fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 33458fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 33468fd57520SJan Höppner 33478fd57520SJan Höppner /* Count and check number of records */ 33488fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 33498fd57520SJan Höppner 33508fd57520SJan Höppner if (count < rpt_exp) { 33518fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 33528fd57520SJan Höppner break; 33538fd57520SJan Höppner } 33548fd57520SJan Höppner if (count > rpt_exp) { 33558fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 33568fd57520SJan Höppner break; 33578fd57520SJan Höppner } 33588fd57520SJan Höppner 33598fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 33608fd57520SJan Höppner blksize = cdata->expect.blksize; 33618fd57520SJan Höppner kl = 0; 33628fd57520SJan Höppner 33638fd57520SJan Höppner /* 33648fd57520SJan Höppner * Set special values when checking CDL formatted 33658fd57520SJan Höppner * devices. 33668fd57520SJan Höppner */ 33678fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 33688fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 33698fd57520SJan Höppner if (j < 3) { 33708fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 33718fd57520SJan Höppner kl = 4; 33728fd57520SJan Höppner } 33738fd57520SJan Höppner } 33748fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 33758fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 33768fd57520SJan Höppner blksize = LABEL_SIZE - 44; 33778fd57520SJan Höppner kl = 44; 33788fd57520SJan Höppner } 33798fd57520SJan Höppner 33808fd57520SJan Höppner /* Check blocksize */ 33818fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 33828fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 33838fd57520SJan Höppner goto out; 33848fd57520SJan Höppner } 33858fd57520SJan Höppner /* Check if key length is 0 */ 33868fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 33878fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 33888fd57520SJan Höppner goto out; 33898fd57520SJan Höppner } 33908fd57520SJan Höppner /* Check if record_id is correct */ 33918fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 33928fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 33938fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 33948fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 33958fd57520SJan Höppner goto out; 33968fd57520SJan Höppner } 33978fd57520SJan Höppner } 33988fd57520SJan Höppner } 33998fd57520SJan Höppner 34008fd57520SJan Höppner out: 34018fd57520SJan Höppner /* 34028fd57520SJan Höppner * In case of no errors, we need to decrease by one 34038fd57520SJan Höppner * to get the correct positions. 34048fd57520SJan Höppner */ 34058fd57520SJan Höppner if (!cdata->result) { 34068fd57520SJan Höppner i--; 34078fd57520SJan Höppner pos--; 34088fd57520SJan Höppner } 34098fd57520SJan Höppner 34108fd57520SJan Höppner cdata->unit = i; 34118fd57520SJan Höppner cdata->num_records = count; 34128fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 34138fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 34148fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 34158fd57520SJan Höppner } 34168fd57520SJan Höppner 34178fd57520SJan Höppner /* 34188fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 34198fd57520SJan Höppner */ 34208fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 34218fd57520SJan Höppner struct format_check_t *cdata, 34228fd57520SJan Höppner int enable_pav) 34238fd57520SJan Höppner { 34248fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 34258fd57520SJan Höppner struct eckd_count *fmt_buffer; 34268fd57520SJan Höppner struct irb irb; 34278fd57520SJan Höppner int rpt_max, rpt_exp; 34288fd57520SJan Höppner int fmt_buffer_size; 34298fd57520SJan Höppner int trk_per_cyl; 34308fd57520SJan Höppner int trkcount; 34318fd57520SJan Höppner int tpm = 0; 34328fd57520SJan Höppner int rc; 34338fd57520SJan Höppner 34348fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 34358fd57520SJan Höppner 34368fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 34378fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 34388fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 34398fd57520SJan Höppner 34408fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 34418fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 34428fd57520SJan Höppner 34438fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 34448fd57520SJan Höppner if (!fmt_buffer) 34458fd57520SJan Höppner return -ENOMEM; 34468fd57520SJan Höppner 34478fd57520SJan Höppner /* 34488fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 34498fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 34508fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 34518fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 34528fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 34538fd57520SJan Höppner * processed using command mode. 34548fd57520SJan Höppner */ 34558fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 34568fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 34578fd57520SJan Höppner tpm = 1; 34588fd57520SJan Höppner 34598fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 34608fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 34618fd57520SJan Höppner if (rc && rc != -EIO) 34628fd57520SJan Höppner goto out; 34638fd57520SJan Höppner if (rc == -EIO) { 34648fd57520SJan Höppner /* 34658fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 34668fd57520SJan Höppner * with an incorrect length error, we're going to retry the 34678fd57520SJan Höppner * check with command mode. 34688fd57520SJan Höppner */ 34698fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 34708fd57520SJan Höppner tpm = 0; 34718fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 34728fd57520SJan Höppner enable_pav, tpm, 34738fd57520SJan Höppner fmt_buffer, rpt_max, 34748fd57520SJan Höppner &irb); 34758fd57520SJan Höppner if (rc) 34768fd57520SJan Höppner goto out; 34778fd57520SJan Höppner } else { 34788fd57520SJan Höppner goto out; 34798fd57520SJan Höppner } 34808fd57520SJan Höppner } 34818fd57520SJan Höppner 34828fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 34838fd57520SJan Höppner trk_per_cyl, tpm); 34848fd57520SJan Höppner 34858fd57520SJan Höppner out: 34868fd57520SJan Höppner kfree(fmt_buffer); 34878fd57520SJan Höppner 34888fd57520SJan Höppner return rc; 3489570d237cSJan Höppner } 3490570d237cSJan Höppner 34918e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 34921da177e4SLinus Torvalds { 3493a2ace466SHannes Reinecke if (cqr->retries < 0) { 3494a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3495a2ace466SHannes Reinecke return; 3496a2ace466SHannes Reinecke } 34978e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 34988e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 34998e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 35008e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3501c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 35021da177e4SLinus Torvalds } 35038e09f215SStefan Weinhuber }; 35041da177e4SLinus Torvalds 35051da177e4SLinus Torvalds static dasd_erp_fn_t 35061da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 35071da177e4SLinus Torvalds { 35088e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 35091da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 35101da177e4SLinus Torvalds 35111da177e4SLinus Torvalds switch (cdev->id.cu_type) { 35121da177e4SLinus Torvalds case 0x3990: 35131da177e4SLinus Torvalds case 0x2105: 35141da177e4SLinus Torvalds case 0x2107: 35151da177e4SLinus Torvalds case 0x1750: 35161da177e4SLinus Torvalds return dasd_3990_erp_action; 35171da177e4SLinus Torvalds case 0x9343: 35181da177e4SLinus Torvalds case 0x3880: 35191da177e4SLinus Torvalds default: 35201da177e4SLinus Torvalds return dasd_default_erp_action; 35211da177e4SLinus Torvalds } 35221da177e4SLinus Torvalds } 35231da177e4SLinus Torvalds 35241da177e4SLinus Torvalds static dasd_erp_fn_t 35251da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 35261da177e4SLinus Torvalds { 35271da177e4SLinus Torvalds return dasd_default_erp_postaction; 35281da177e4SLinus Torvalds } 35291da177e4SLinus Torvalds 35305a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 35315a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 35328e09f215SStefan Weinhuber struct irb *irb) 35338e09f215SStefan Weinhuber { 35348e09f215SStefan Weinhuber char mask; 3535f3eb5384SStefan Weinhuber char *sense = NULL; 3536543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 35378e09f215SStefan Weinhuber 35388e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 35398e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3540f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3541c8d1c0ffSStefan Haberland /* 3542c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3543c8d1c0ffSStefan Haberland * and only if not suspended 3544c8d1c0ffSStefan Haberland */ 3545501183f2SStefan Haberland if (!device->block && private->lcu && 354625e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3547c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3548c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3549501183f2SStefan Haberland /* schedule worker to reload device */ 3550501183f2SStefan Haberland dasd_reload_device(device); 3551501183f2SStefan Haberland } 35528e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 35538e09f215SStefan Weinhuber return; 35548e09f215SStefan Weinhuber } 35558e09f215SStefan Weinhuber 3556a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 35575a27e60dSStefan Weinhuber if (!sense) 35585a27e60dSStefan Weinhuber return; 35595a27e60dSStefan Weinhuber 35605a27e60dSStefan Weinhuber /* summary unit check */ 3561c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3562a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 356359a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 356459a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 356559a9ed5fSStefan Haberland "eckd suc: device already notified"); 356659a9ed5fSStefan Haberland return; 356759a9ed5fSStefan Haberland } 356859a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 356959a9ed5fSStefan Haberland if (!sense) { 357059a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 357159a9ed5fSStefan Haberland "eckd suc: no reason code available"); 357259a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 357359a9ed5fSStefan Haberland return; 357459a9ed5fSStefan Haberland 357559a9ed5fSStefan Haberland } 357659a9ed5fSStefan Haberland private->suc_reason = sense[8]; 357759a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 357859a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 357959a9ed5fSStefan Haberland private->suc_reason); 358059a9ed5fSStefan Haberland dasd_get_device(device); 358159a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 358259a9ed5fSStefan Haberland dasd_put_device(device); 358359a9ed5fSStefan Haberland 35848e09f215SStefan Weinhuber return; 35858e09f215SStefan Weinhuber } 35868e09f215SStefan Weinhuber 3587f60c768cSStefan Haberland /* service information message SIM */ 35885a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3589f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3590f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3591f60c768cSStefan Haberland return; 3592f60c768cSStefan Haberland } 3593f60c768cSStefan Haberland 35945a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 35955a27e60dSStefan Weinhuber * as alias devices may be used with several bases 35965a27e60dSStefan Weinhuber */ 3597c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3598c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 35995a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 36005a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 36015a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 36025a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 36035a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36045a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 36055a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3606ada3df91SStefan Haberland } 36075a27e60dSStefan Weinhuber } 3608f3eb5384SStefan Weinhuber 360991dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 361091dc4a19SJan Höppner unsigned int first_trk, 361191dc4a19SJan Höppner unsigned int last_trk) 361291dc4a19SJan Höppner { 361391dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 361491dc4a19SJan Höppner unsigned int trks_per_vol; 361591dc4a19SJan Höppner int rc = 0; 361691dc4a19SJan Höppner 361791dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 361891dc4a19SJan Höppner 361991dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 362091dc4a19SJan Höppner dev_warn(&device->cdev->dev, 362191dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 362291dc4a19SJan Höppner first_trk); 362391dc4a19SJan Höppner rc = -EINVAL; 362491dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 362591dc4a19SJan Höppner dev_warn(&device->cdev->dev, 362691dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 362791dc4a19SJan Höppner last_trk); 362891dc4a19SJan Höppner rc = -EINVAL; 362991dc4a19SJan Höppner } else if (first_trk > last_trk) { 363091dc4a19SJan Höppner dev_warn(&device->cdev->dev, 363191dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 363291dc4a19SJan Höppner first_trk); 363391dc4a19SJan Höppner rc = -EINVAL; 363491dc4a19SJan Höppner } 363591dc4a19SJan Höppner return rc; 363691dc4a19SJan Höppner } 363791dc4a19SJan Höppner 363891dc4a19SJan Höppner /* 363991dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 364091dc4a19SJan Höppner * with extent alignment in mind. 364191dc4a19SJan Höppner */ 364291dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 364391dc4a19SJan Höppner { 364491dc4a19SJan Höppner int cur_pos = 0; 364591dc4a19SJan Höppner int count = 0; 364691dc4a19SJan Höppner int tmp; 364791dc4a19SJan Höppner 364891dc4a19SJan Höppner if (from == to) 364991dc4a19SJan Höppner return 1; 365091dc4a19SJan Höppner 365191dc4a19SJan Höppner /* Count first partial extent */ 365291dc4a19SJan Höppner if (from % trks_per_ext != 0) { 365391dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 365491dc4a19SJan Höppner if (tmp > to) 365591dc4a19SJan Höppner tmp = to; 365691dc4a19SJan Höppner cur_pos = tmp - from + 1; 365791dc4a19SJan Höppner count++; 365891dc4a19SJan Höppner } 365991dc4a19SJan Höppner /* Count full extents */ 366091dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 366191dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 366291dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 366391dc4a19SJan Höppner cur_pos = tmp; 366491dc4a19SJan Höppner } 366591dc4a19SJan Höppner /* Count last partial extent */ 366691dc4a19SJan Höppner if (cur_pos < to) 366791dc4a19SJan Höppner count++; 366891dc4a19SJan Höppner 366991dc4a19SJan Höppner return count; 367091dc4a19SJan Höppner } 367191dc4a19SJan Höppner 367291dc4a19SJan Höppner /* 367391dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 367491dc4a19SJan Höppner */ 367591dc4a19SJan Höppner static struct dasd_ccw_req * 367691dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 367791dc4a19SJan Höppner struct request *req, unsigned int first_trk, 367891dc4a19SJan Höppner unsigned int last_trk, int by_extent) 367991dc4a19SJan Höppner { 368091dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 368191dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 368291dc4a19SJan Höppner struct dasd_rssd_features *features; 368391dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 368491dc4a19SJan Höppner u16 heads, beg_head, end_head; 368591dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 368691dc4a19SJan Höppner struct dasd_ccw_req *cqr; 368791dc4a19SJan Höppner u32 beg_cyl, end_cyl; 368891dc4a19SJan Höppner struct ccw1 *ccw; 368991dc4a19SJan Höppner int trks_per_ext; 369091dc4a19SJan Höppner size_t ras_size; 369191dc4a19SJan Höppner size_t size; 369291dc4a19SJan Höppner int nr_exts; 369391dc4a19SJan Höppner void *rq; 369491dc4a19SJan Höppner int i; 369591dc4a19SJan Höppner 369691dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 369791dc4a19SJan Höppner return ERR_PTR(-EINVAL); 369891dc4a19SJan Höppner 369991dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 370091dc4a19SJan Höppner 370191dc4a19SJan Höppner features = &private->features; 370291dc4a19SJan Höppner 370391dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 370491dc4a19SJan Höppner nr_exts = 0; 370591dc4a19SJan Höppner if (by_extent) 370691dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 370791dc4a19SJan Höppner ras_size = sizeof(*ras_data); 370891dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 370991dc4a19SJan Höppner 371091dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 371191dc4a19SJan Höppner if (IS_ERR(cqr)) { 371291dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 371391dc4a19SJan Höppner "Could not allocate RAS request"); 371491dc4a19SJan Höppner return cqr; 371591dc4a19SJan Höppner } 371691dc4a19SJan Höppner 371791dc4a19SJan Höppner ras_data = cqr->data; 371891dc4a19SJan Höppner memset(ras_data, 0, size); 371991dc4a19SJan Höppner 372091dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 372191dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 372291dc4a19SJan Höppner /* Release specified extents or entire volume */ 372391dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 372491dc4a19SJan Höppner /* 372591dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 372691dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 372791dc4a19SJan Höppner * subset. 372891dc4a19SJan Höppner */ 372991dc4a19SJan Höppner ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 3730*542e30ceSStefan Haberland ras_data->lss = private->conf.ned->ID; 3731*542e30ceSStefan Haberland ras_data->dev_addr = private->conf.ned->unit_addr; 373291dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 373391dc4a19SJan Höppner 373491dc4a19SJan Höppner if (by_extent) { 373591dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 373691dc4a19SJan Höppner cur_from_trk = first_trk; 373791dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 373891dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 373991dc4a19SJan Höppner if (cur_to_trk > last_trk) 374091dc4a19SJan Höppner cur_to_trk = last_trk; 374191dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 374291dc4a19SJan Höppner 374391dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 374491dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 374591dc4a19SJan Höppner beg_head = cur_from_trk % heads; 374691dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 374791dc4a19SJan Höppner end_head = cur_to_trk % heads; 374891dc4a19SJan Höppner 374991dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 375091dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 375191dc4a19SJan Höppner 375291dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 375391dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 375491dc4a19SJan Höppner if (cur_to_trk > last_trk) 375591dc4a19SJan Höppner cur_to_trk = last_trk; 375691dc4a19SJan Höppner ras_range++; 375791dc4a19SJan Höppner } 375891dc4a19SJan Höppner } 375991dc4a19SJan Höppner 376091dc4a19SJan Höppner ccw = cqr->cpaddr; 376191dc4a19SJan Höppner ccw->cda = (__u32)(addr_t)cqr->data; 376291dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 376391dc4a19SJan Höppner ccw->count = size; 376491dc4a19SJan Höppner 376591dc4a19SJan Höppner cqr->startdev = device; 376691dc4a19SJan Höppner cqr->memdev = device; 376791dc4a19SJan Höppner cqr->block = block; 376891dc4a19SJan Höppner cqr->retries = 256; 376991dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 377091dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 377191dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 377291dc4a19SJan Höppner 377391dc4a19SJan Höppner return cqr; 377491dc4a19SJan Höppner } 377591dc4a19SJan Höppner 377691dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 377791dc4a19SJan Höppner { 377891dc4a19SJan Höppner struct dasd_ccw_req *cqr; 377991dc4a19SJan Höppner int rc; 378091dc4a19SJan Höppner 378191dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 378291dc4a19SJan Höppner if (IS_ERR(cqr)) 378391dc4a19SJan Höppner return PTR_ERR(cqr); 378491dc4a19SJan Höppner 378591dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 378691dc4a19SJan Höppner 378791dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 378891dc4a19SJan Höppner 378991dc4a19SJan Höppner return rc; 379091dc4a19SJan Höppner } 379191dc4a19SJan Höppner 379291dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 379391dc4a19SJan Höppner unsigned int from, unsigned int to) 379491dc4a19SJan Höppner { 379591dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 379691dc4a19SJan Höppner struct dasd_block *block = device->block; 379791dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 379891dc4a19SJan Höppner struct list_head ras_queue; 379991dc4a19SJan Höppner unsigned int device_exts; 380091dc4a19SJan Höppner int trks_per_ext; 380191dc4a19SJan Höppner int stop, step; 380291dc4a19SJan Höppner int cur_pos; 380391dc4a19SJan Höppner int rc = 0; 380491dc4a19SJan Höppner int retry; 380591dc4a19SJan Höppner 380691dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 380791dc4a19SJan Höppner 380891dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 380991dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 381091dc4a19SJan Höppner 381191dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 381291dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 381391dc4a19SJan Höppner cur_pos = from; 381491dc4a19SJan Höppner 381591dc4a19SJan Höppner do { 381691dc4a19SJan Höppner retry = 0; 381791dc4a19SJan Höppner while (cur_pos < to) { 381891dc4a19SJan Höppner stop = cur_pos + step - 381991dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 382091dc4a19SJan Höppner if (stop > to) 382191dc4a19SJan Höppner stop = to; 382291dc4a19SJan Höppner 382391dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 382491dc4a19SJan Höppner if (IS_ERR(cqr)) { 382591dc4a19SJan Höppner rc = PTR_ERR(cqr); 382691dc4a19SJan Höppner if (rc == -ENOMEM) { 382791dc4a19SJan Höppner if (list_empty(&ras_queue)) 382891dc4a19SJan Höppner goto out; 382991dc4a19SJan Höppner retry = 1; 383091dc4a19SJan Höppner break; 383191dc4a19SJan Höppner } 383291dc4a19SJan Höppner goto err_out; 383391dc4a19SJan Höppner } 383491dc4a19SJan Höppner 383591dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 383691dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 383791dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 383891dc4a19SJan Höppner cur_pos = stop + 1; 383991dc4a19SJan Höppner } 384091dc4a19SJan Höppner 384191dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 384291dc4a19SJan Höppner 384391dc4a19SJan Höppner err_out: 384491dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 384591dc4a19SJan Höppner device = cqr->startdev; 384691dc4a19SJan Höppner private = device->private; 384791dc4a19SJan Höppner 384891dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 384991dc4a19SJan Höppner list_del_init(&cqr->blocklist); 385091dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 385191dc4a19SJan Höppner dasd_sfree_request(cqr, device); 385291dc4a19SJan Höppner private->count--; 385391dc4a19SJan Höppner } 385491dc4a19SJan Höppner } while (retry); 385591dc4a19SJan Höppner 385691dc4a19SJan Höppner out: 385791dc4a19SJan Höppner return rc; 385891dc4a19SJan Höppner } 385991dc4a19SJan Höppner 386091dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 386191dc4a19SJan Höppner struct format_data_t *rdata) 386291dc4a19SJan Höppner { 386391dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 386491dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 386591dc4a19SJan Höppner else if (rdata->intensity == 0) 386691dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 386791dc4a19SJan Höppner rdata->stop_unit); 386891dc4a19SJan Höppner else 386991dc4a19SJan Höppner return -EINVAL; 387091dc4a19SJan Höppner } 387191dc4a19SJan Höppner 3872f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3873f3eb5384SStefan Weinhuber struct dasd_device *startdev, 38748e09f215SStefan Weinhuber struct dasd_block *block, 3875f3eb5384SStefan Weinhuber struct request *req, 3876f3eb5384SStefan Weinhuber sector_t first_rec, 3877f3eb5384SStefan Weinhuber sector_t last_rec, 3878f3eb5384SStefan Weinhuber sector_t first_trk, 3879f3eb5384SStefan Weinhuber sector_t last_trk, 3880f3eb5384SStefan Weinhuber unsigned int first_offs, 3881f3eb5384SStefan Weinhuber unsigned int last_offs, 3882f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3883f3eb5384SStefan Weinhuber unsigned int blksize) 38841da177e4SLinus Torvalds { 38851da177e4SLinus Torvalds struct dasd_eckd_private *private; 38861da177e4SLinus Torvalds unsigned long *idaws; 38871da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 38881da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 38891da177e4SLinus Torvalds struct ccw1 *ccw; 38905705f702SNeilBrown struct req_iterator iter; 38917988613bSKent Overstreet struct bio_vec bv; 38921da177e4SLinus Torvalds char *dst; 3893f3eb5384SStefan Weinhuber unsigned int off; 38941da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3895f3eb5384SStefan Weinhuber sector_t recid; 38961da177e4SLinus Torvalds unsigned char cmd, rcmd; 38978e09f215SStefan Weinhuber int use_prefix; 38988e09f215SStefan Weinhuber struct dasd_device *basedev; 38991da177e4SLinus Torvalds 39008e09f215SStefan Weinhuber basedev = block->base; 3901543691a4SSebastian Ott private = basedev->private; 39021da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39031da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 39041da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 39051da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 39061da177e4SLinus Torvalds else 39071da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3908f3eb5384SStefan Weinhuber 39091da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 39101da177e4SLinus Torvalds count = 0; 39111da177e4SLinus Torvalds cidaw = 0; 39125705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39137988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 39141da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 39151da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 39167988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 39177988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 39187988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 39191da177e4SLinus Torvalds } 39201da177e4SLinus Torvalds /* Paranoia. */ 39211da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 39221da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 39238e09f215SStefan Weinhuber 39248e09f215SStefan Weinhuber /* use the prefix command if available */ 39258e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 39268e09f215SStefan Weinhuber if (use_prefix) { 39278e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 39288e09f215SStefan Weinhuber cplength = 2 + count; 39298e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 39308e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 39318e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 39328e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 39338e09f215SStefan Weinhuber } else { 39341da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 39351da177e4SLinus Torvalds cplength = 2 + count; 39361da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 39378e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 39388e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 39391da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 39408e09f215SStefan Weinhuber } 39411da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 39421da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 39431da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 39441da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 39451da177e4SLinus Torvalds cplength += count; 39461da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 39471da177e4SLinus Torvalds } 39481da177e4SLinus Torvalds /* Allocate the ccw request. */ 394968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3950c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 39511da177e4SLinus Torvalds if (IS_ERR(cqr)) 39521da177e4SLinus Torvalds return cqr; 39531da177e4SLinus Torvalds ccw = cqr->cpaddr; 39548e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 39558e09f215SStefan Weinhuber if (use_prefix) { 39568e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 39578e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 39588e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 39598e09f215SStefan Weinhuber * Try again later. 39608e09f215SStefan Weinhuber */ 39618e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3962d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3963d54853efSMartin Schwidefsky } 39648e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 39658e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 39668e09f215SStefan Weinhuber } else { 39678e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 396845f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 39698e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 39708e09f215SStefan Weinhuber * Try again later. 39718e09f215SStefan Weinhuber */ 39728e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 39738e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 39748e09f215SStefan Weinhuber } 39758e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 39768e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 39778e09f215SStefan Weinhuber } 39781da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 39791da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 39801da177e4SLinus Torvalds recid = first_rec; 39811da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 39821da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 39831da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 39841da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 39858e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 39861da177e4SLinus Torvalds } 39875705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 3988bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 39891da177e4SLinus Torvalds if (dasd_page_cache) { 39901da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3991441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 39921da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 39937988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 39941da177e4SLinus Torvalds if (copy) 39957988613bSKent Overstreet dst = copy + bv.bv_offset; 39961da177e4SLinus Torvalds } 39977988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 39981da177e4SLinus Torvalds sector_t trkid = recid; 39991da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 40001da177e4SLinus Torvalds rcmd = cmd; 40011da177e4SLinus Torvalds count = blksize; 40021da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 40031da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 40041da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 40051da177e4SLinus Torvalds rcmd |= 0x8; 40061da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 4007ec5883abSHorst Hummel if (count < blksize && 4008ec5883abSHorst Hummel rq_data_dir(req) == READ) 40091da177e4SLinus Torvalds memset(dst + count, 0xe5, 40101da177e4SLinus Torvalds blksize - count); 40111da177e4SLinus Torvalds } 40121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40131da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 40141da177e4SLinus Torvalds trkid, recoffs + 1, 40158e09f215SStefan Weinhuber 1, rcmd, basedev, count); 40161da177e4SLinus Torvalds } 40171da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 40181da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 40191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40201da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 40211da177e4SLinus Torvalds trkid, recoffs + 1, 40221da177e4SLinus Torvalds last_rec - recid + 1, 40238e09f215SStefan Weinhuber cmd, basedev, count); 40241da177e4SLinus Torvalds } 40251da177e4SLinus Torvalds /* Read/write ccw. */ 40261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40271da177e4SLinus Torvalds ccw->cmd_code = rcmd; 40281da177e4SLinus Torvalds ccw->count = count; 40291da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 40301da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 40311da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 40321da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 40331da177e4SLinus Torvalds } else { 40341da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 40351da177e4SLinus Torvalds ccw->flags = 0; 40361da177e4SLinus Torvalds } 40371da177e4SLinus Torvalds ccw++; 40381da177e4SLinus Torvalds dst += blksize; 40391da177e4SLinus Torvalds recid++; 40401da177e4SLinus Torvalds } 40411da177e4SLinus Torvalds } 404213de227bSHolger Smolinski if (blk_noretry_request(req) || 404313de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 40441c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 40458e09f215SStefan Weinhuber cqr->startdev = startdev; 40468e09f215SStefan Weinhuber cqr->memdev = startdev; 40478e09f215SStefan Weinhuber cqr->block = block; 40487c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4049c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 40501f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 40511aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 40521da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 40535e2b17e7SJan Höppner 40545e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 40555e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 40565e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 40575e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 40585e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 40595e2b17e7SJan Höppner } 40605e2b17e7SJan Höppner 40611da177e4SLinus Torvalds return cqr; 40621da177e4SLinus Torvalds } 40631da177e4SLinus Torvalds 4064f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4065f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4066f3eb5384SStefan Weinhuber struct dasd_block *block, 4067f3eb5384SStefan Weinhuber struct request *req, 4068f3eb5384SStefan Weinhuber sector_t first_rec, 4069f3eb5384SStefan Weinhuber sector_t last_rec, 4070f3eb5384SStefan Weinhuber sector_t first_trk, 4071f3eb5384SStefan Weinhuber sector_t last_trk, 4072f3eb5384SStefan Weinhuber unsigned int first_offs, 4073f3eb5384SStefan Weinhuber unsigned int last_offs, 4074f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4075f3eb5384SStefan Weinhuber unsigned int blksize) 4076f3eb5384SStefan Weinhuber { 4077f3eb5384SStefan Weinhuber unsigned long *idaws; 4078f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4079f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4080f3eb5384SStefan Weinhuber struct req_iterator iter; 40817988613bSKent Overstreet struct bio_vec bv; 4082f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 4083f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 4084f3eb5384SStefan Weinhuber unsigned int tlf; 4085f3eb5384SStefan Weinhuber sector_t recid; 4086f3eb5384SStefan Weinhuber unsigned char cmd; 4087f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4088f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 4089f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4090f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 4091f3eb5384SStefan Weinhuber sector_t trkid; 4092f3eb5384SStefan Weinhuber unsigned int recoffs; 4093f3eb5384SStefan Weinhuber 4094f3eb5384SStefan Weinhuber basedev = block->base; 4095f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 4096f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4097f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 4098f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4099f3eb5384SStefan Weinhuber else 4100f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4101f3eb5384SStefan Weinhuber 4102f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 4103f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 4104f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 4105f3eb5384SStefan Weinhuber * of records as upper limit. 4106f3eb5384SStefan Weinhuber */ 4107f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 4108f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4109f3eb5384SStefan Weinhuber 4110f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 4111f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 4112f3eb5384SStefan Weinhuber 41137bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4114f3eb5384SStefan Weinhuber 4115f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 411668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4117c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 4118f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4119f3eb5384SStefan Weinhuber return cqr; 4120f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4121f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4122f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4123f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4124f3eb5384SStefan Weinhuber else 4125f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4126f3eb5384SStefan Weinhuber tlf *= blksize; 4127f3eb5384SStefan Weinhuber 4128f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 4129f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 4130f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 4131f3eb5384SStefan Weinhuber trkcount, blksize, 4132f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 4133f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4134f3eb5384SStefan Weinhuber * Try again later. 4135f3eb5384SStefan Weinhuber */ 4136f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4137f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 4138f3eb5384SStefan Weinhuber } 4139f3eb5384SStefan Weinhuber 4140f3eb5384SStefan Weinhuber /* 4141f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 4142f3eb5384SStefan Weinhuber * following conditions: 4143f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 4144f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 4145f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 4146f3eb5384SStefan Weinhuber */ 4147f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 4148f3eb5384SStefan Weinhuber recid = first_rec; 4149f3eb5384SStefan Weinhuber new_track = 1; 4150f3eb5384SStefan Weinhuber end_idaw = 0; 4151f3eb5384SStefan Weinhuber len_to_track_end = 0; 4152246ccea1SMartin Schwidefsky idaw_dst = NULL; 4153f3eb5384SStefan Weinhuber idaw_len = 0; 4154f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4155bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 41567988613bSKent Overstreet seg_len = bv.bv_len; 4157f3eb5384SStefan Weinhuber while (seg_len) { 4158f3eb5384SStefan Weinhuber if (new_track) { 4159f3eb5384SStefan Weinhuber trkid = recid; 4160f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 4161f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 4162f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 4163f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 4164f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 4165f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4166f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 4167f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 4168f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4169f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 4170f3eb5384SStefan Weinhuber ccw++; 4171f3eb5384SStefan Weinhuber recid += count; 4172f3eb5384SStefan Weinhuber new_track = 0; 417352db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 417452db45c3SStefan Weinhuber if (!idaw_dst) 417552db45c3SStefan Weinhuber idaw_dst = dst; 4176f3eb5384SStefan Weinhuber } 417752db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 417852db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 4179f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 4180f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 4181f3eb5384SStefan Weinhuber * idaw ends 4182f3eb5384SStefan Weinhuber */ 418352db45c3SStefan Weinhuber if (!idaw_dst) { 418452db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 418552db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 418652db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 418752db45c3SStefan Weinhuber } else 4188f3eb5384SStefan Weinhuber idaw_dst = dst; 418952db45c3SStefan Weinhuber } 4190f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 4191f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4192f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 4193f3eb5384SStefan Weinhuber } 4194f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4195f3eb5384SStefan Weinhuber seg_len -= part_len; 4196f3eb5384SStefan Weinhuber dst += part_len; 4197f3eb5384SStefan Weinhuber idaw_len += part_len; 4198f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 4199f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 4200f3eb5384SStefan Weinhuber * -> create an idaw 4201f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 4202f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 4203f3eb5384SStefan Weinhuber */ 4204f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4205f3eb5384SStefan Weinhuber end_idaw = 1; 4206f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 4207f3eb5384SStefan Weinhuber if (!len_to_track_end) { 4208f3eb5384SStefan Weinhuber new_track = 1; 4209f3eb5384SStefan Weinhuber end_idaw = 1; 4210f3eb5384SStefan Weinhuber } 4211f3eb5384SStefan Weinhuber if (end_idaw) { 4212f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 4213f3eb5384SStefan Weinhuber idaw_len); 4214246ccea1SMartin Schwidefsky idaw_dst = NULL; 4215f3eb5384SStefan Weinhuber idaw_len = 0; 4216f3eb5384SStefan Weinhuber end_idaw = 0; 4217f3eb5384SStefan Weinhuber } 4218f3eb5384SStefan Weinhuber } 4219f3eb5384SStefan Weinhuber } 4220f3eb5384SStefan Weinhuber 4221f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4222f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4223f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4224f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4225f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4226f3eb5384SStefan Weinhuber cqr->block = block; 42277c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4228c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 42291f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 42301aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4231f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 42325e2b17e7SJan Höppner 42335e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 42345e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 42355e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 42365e2b17e7SJan Höppner 4237f3eb5384SStefan Weinhuber return cqr; 4238f3eb5384SStefan Weinhuber } 4239f3eb5384SStefan Weinhuber 4240f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4241f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4242f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4243f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4244f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4245f3eb5384SStefan Weinhuber unsigned int blksize, 4246f3eb5384SStefan Weinhuber unsigned int total_data_size, 4247f3eb5384SStefan Weinhuber unsigned int tlf, 4248f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4249f3eb5384SStefan Weinhuber { 4250f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4251f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4252f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4253f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4254f3eb5384SStefan Weinhuber struct dcw *dcw; 4255f3eb5384SStefan Weinhuber 4256f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4257f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4258f3eb5384SStefan Weinhuber u8 pfx_cmd; 4259f3eb5384SStefan Weinhuber 4260f3eb5384SStefan Weinhuber int rc = 0; 4261f3eb5384SStefan Weinhuber int sector = 0; 4262f3eb5384SStefan Weinhuber int dn, d; 4263f3eb5384SStefan Weinhuber 4264f3eb5384SStefan Weinhuber 4265f3eb5384SStefan Weinhuber /* setup prefix data */ 4266543691a4SSebastian Ott basepriv = basedev->private; 4267543691a4SSebastian Ott startpriv = startdev->private; 4268f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4269f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4270f3eb5384SStefan Weinhuber 4271f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4272f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4273*542e30ceSStefan Haberland pfxdata.base_address = basepriv->conf.ned->unit_addr; 4274*542e30ceSStefan Haberland pfxdata.base_lss = basepriv->conf.ned->ID; 4275f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4276f3eb5384SStefan Weinhuber 4277f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4278da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4279f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4280da340f92SStefan Haberland 4281da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4282da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4283f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4284f3eb5384SStefan Weinhuber } 4285f3eb5384SStefan Weinhuber 4286f3eb5384SStefan Weinhuber switch (cmd) { 4287f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4288f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4289f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4290f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4291f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4292f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4293f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4294f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4295f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4296f3eb5384SStefan Weinhuber break; 4297f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4298f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4299f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4300f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 43015628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4302f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4303f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4304f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4305f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4306f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 430745f186beSJan Höppner /* 430845f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 430945f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 431045f186beSJan Höppner * data as well. 431145f186beSJan Höppner */ 431245f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 431345f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4314f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4315f3eb5384SStefan Weinhuber break; 43168fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 43178fd57520SJan Höppner dedata->mask.perm = 0x1; 43188fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 43198fd57520SJan Höppner dedata->ga_extended |= 0x42; 43208fd57520SJan Höppner dedata->blk_size = blksize; 43218fd57520SJan Höppner lredata->operation.orientation = 0x2; 43228fd57520SJan Höppner lredata->operation.operation = 0x16; 43238fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 43248fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 43258fd57520SJan Höppner break; 4326f3eb5384SStefan Weinhuber default: 4327f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4328f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4329f3eb5384SStefan Weinhuber BUG(); 4330f3eb5384SStefan Weinhuber break; 4331f3eb5384SStefan Weinhuber } 4332f3eb5384SStefan Weinhuber if (rc) 4333f3eb5384SStefan Weinhuber return rc; 4334f3eb5384SStefan Weinhuber 4335f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4336f3eb5384SStefan Weinhuber 4337f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4338f3eb5384SStefan Weinhuber begcyl = trk / heads; 4339f3eb5384SStefan Weinhuber beghead = trk % heads; 4340f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4341f3eb5384SStefan Weinhuber endhead = totrk % heads; 4342f3eb5384SStefan Weinhuber 4343f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4344f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4345f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4346f3eb5384SStefan Weinhuber 4347f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4348f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4349f3eb5384SStefan Weinhuber else 4350f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4351f3eb5384SStefan Weinhuber } 4352f3eb5384SStefan Weinhuber 4353f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4354f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4355f3eb5384SStefan Weinhuber 4356f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4357f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4358f3eb5384SStefan Weinhuber 4359f3eb5384SStefan Weinhuber if (rec_on_trk) { 4360f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4361f3eb5384SStefan Weinhuber case 0x3390: 4362f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4363f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4364f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4365f3eb5384SStefan Weinhuber break; 4366f3eb5384SStefan Weinhuber case 0x3380: 4367f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4368f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4369f3eb5384SStefan Weinhuber break; 4370f3eb5384SStefan Weinhuber } 4371f3eb5384SStefan Weinhuber } 4372f3eb5384SStefan Weinhuber 43738fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 43748fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 43758fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 43768fd57520SJan Höppner lredata->sector = 0xff; 43778fd57520SJan Höppner } else { 4378f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4379f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 43808fd57520SJan Höppner lredata->sector = sector; 43818fd57520SJan Höppner } 4382f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4383f3eb5384SStefan Weinhuber lredata->length = tlf; 4384f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4385f3eb5384SStefan Weinhuber lredata->count = count; 4386f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4387f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4388f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4389f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4390f3eb5384SStefan Weinhuber 4391f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4392f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4393757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4394f3eb5384SStefan Weinhuber } 4395f3eb5384SStefan Weinhuber 4396f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4397f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4398f3eb5384SStefan Weinhuber struct dasd_block *block, 4399f3eb5384SStefan Weinhuber struct request *req, 4400f3eb5384SStefan Weinhuber sector_t first_rec, 4401f3eb5384SStefan Weinhuber sector_t last_rec, 4402f3eb5384SStefan Weinhuber sector_t first_trk, 4403f3eb5384SStefan Weinhuber sector_t last_trk, 4404f3eb5384SStefan Weinhuber unsigned int first_offs, 4405f3eb5384SStefan Weinhuber unsigned int last_offs, 4406f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4407f3eb5384SStefan Weinhuber unsigned int blksize) 4408f3eb5384SStefan Weinhuber { 4409f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4410f3eb5384SStefan Weinhuber struct req_iterator iter; 44117988613bSKent Overstreet struct bio_vec bv; 4412f3eb5384SStefan Weinhuber char *dst; 4413f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4414f3eb5384SStefan Weinhuber unsigned char cmd; 4415f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4416f3eb5384SStefan Weinhuber unsigned int tlf; 4417f3eb5384SStefan Weinhuber struct itcw *itcw; 4418f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4419f3eb5384SStefan Weinhuber int itcw_op; 4420f3eb5384SStefan Weinhuber size_t itcw_size; 4421ef19298bSStefan Weinhuber u8 tidaw_flags; 4422ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4423ef19298bSStefan Weinhuber unsigned char new_track; 4424ef19298bSStefan Weinhuber sector_t recid, trkid; 4425ef19298bSStefan Weinhuber unsigned int offs; 4426ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4427cd10502bSJulia Lawall int ret; 4428f3eb5384SStefan Weinhuber 4429f3eb5384SStefan Weinhuber basedev = block->base; 4430f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4431f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4432f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4433f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4434f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4435f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4436f3eb5384SStefan Weinhuber } else 4437f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4438f3eb5384SStefan Weinhuber 4439f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4440f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4441f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4442ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4443ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4444f3eb5384SStefan Weinhuber */ 4445f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4446f3eb5384SStefan Weinhuber ctidaw = 0; 4447f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4448f3eb5384SStefan Weinhuber ++ctidaw; 4449f3eb5384SStefan Weinhuber } 4450ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4451ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4452f3eb5384SStefan Weinhuber 4453f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4454f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4455c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4456c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4457f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4458f3eb5384SStefan Weinhuber return cqr; 4459f3eb5384SStefan Weinhuber 4460f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4461f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4462f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4463f3eb5384SStefan Weinhuber else 4464f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4465f3eb5384SStefan Weinhuber tlf *= blksize; 4466f3eb5384SStefan Weinhuber 4467f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4468ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4469cd10502bSJulia Lawall ret = -EINVAL; 4470cd10502bSJulia Lawall goto out_error; 4471ef19298bSStefan Weinhuber } 4472f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4473f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4474f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4475f3eb5384SStefan Weinhuber first_offs + 1, 4476f3eb5384SStefan Weinhuber trkcount, blksize, 4477f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4478f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4479f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4480f3eb5384SStefan Weinhuber * Try again later. 4481f3eb5384SStefan Weinhuber */ 4482cd10502bSJulia Lawall ret = -EAGAIN; 4483cd10502bSJulia Lawall goto out_error; 4484f3eb5384SStefan Weinhuber } 4485d54cddb6SHeiko Carstens len_to_track_end = 0; 4486f3eb5384SStefan Weinhuber /* 4487f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4488f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4489f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4490f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4491ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4492ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4493f3eb5384SStefan Weinhuber */ 4494ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4495ef19298bSStefan Weinhuber new_track = 1; 4496ef19298bSStefan Weinhuber recid = first_rec; 4497f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4498bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 44997988613bSKent Overstreet seg_len = bv.bv_len; 4500ef19298bSStefan Weinhuber while (seg_len) { 4501ef19298bSStefan Weinhuber if (new_track) { 4502ef19298bSStefan Weinhuber trkid = recid; 4503ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4504ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4505ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4506ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4507ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4508ef19298bSStefan Weinhuber recid += count; 4509ef19298bSStefan Weinhuber new_track = 0; 4510f3eb5384SStefan Weinhuber } 4511ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4512ef19298bSStefan Weinhuber seg_len -= part_len; 4513ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4514ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4515ef19298bSStefan Weinhuber if (!len_to_track_end) { 4516ef19298bSStefan Weinhuber new_track = 1; 4517ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4518ef19298bSStefan Weinhuber } else 4519ef19298bSStefan Weinhuber tidaw_flags = 0; 4520ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4521ef19298bSStefan Weinhuber dst, part_len); 4522cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4523cd10502bSJulia Lawall ret = -EINVAL; 4524cd10502bSJulia Lawall goto out_error; 4525cd10502bSJulia Lawall } 4526ef19298bSStefan Weinhuber dst += part_len; 4527ef19298bSStefan Weinhuber } 4528ef19298bSStefan Weinhuber } 4529ef19298bSStefan Weinhuber } else { 4530ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4531bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 4532ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 45337988613bSKent Overstreet dst, bv.bv_len); 4534cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4535cd10502bSJulia Lawall ret = -EINVAL; 4536cd10502bSJulia Lawall goto out_error; 4537cd10502bSJulia Lawall } 4538ef19298bSStefan Weinhuber } 4539ef19298bSStefan Weinhuber } 4540ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4541ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4542f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4543f3eb5384SStefan Weinhuber 4544f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4545f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4546f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4547ef19298bSStefan Weinhuber cqr->cpmode = 1; 4548f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4549f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4550f3eb5384SStefan Weinhuber cqr->block = block; 45517c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4552c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 45531f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 45541aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4555f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 45565e2b17e7SJan Höppner 45575e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 45585e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 45595e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 45605e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 45615e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 45625e2b17e7SJan Höppner } 45635e2b17e7SJan Höppner 4564f3eb5384SStefan Weinhuber return cqr; 4565cd10502bSJulia Lawall out_error: 4566cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4567cd10502bSJulia Lawall return ERR_PTR(ret); 4568f3eb5384SStefan Weinhuber } 4569f3eb5384SStefan Weinhuber 4570f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4571f3eb5384SStefan Weinhuber struct dasd_block *block, 4572f3eb5384SStefan Weinhuber struct request *req) 4573f3eb5384SStefan Weinhuber { 4574ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4575f3eb5384SStefan Weinhuber int use_prefix; 4576ef19298bSStefan Weinhuber int fcx_multitrack; 457745b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4578f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4579f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4580f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4581f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4582f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4583f3eb5384SStefan Weinhuber int cdlspecial; 4584ef19298bSStefan Weinhuber unsigned int data_size; 4585f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4586f3eb5384SStefan Weinhuber 4587f3eb5384SStefan Weinhuber basedev = block->base; 4588543691a4SSebastian Ott private = basedev->private; 4589f3eb5384SStefan Weinhuber 4590f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4591f3eb5384SStefan Weinhuber blksize = block->bp_block; 4592f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 45936fca97a9SStefan Haberland if (blk_per_trk == 0) 45946fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4595f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 459683096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4597f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4598f3eb5384SStefan Weinhuber last_rec = last_trk = 459983096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4600f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4601f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4602f3eb5384SStefan Weinhuber 4603ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4604ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 460526a35f37SStefan Weinhuber if (data_size % blksize) 460626a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4607ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4608ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4609ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4610f3eb5384SStefan Weinhuber 4611f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4612f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4613f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4614f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4615f3eb5384SStefan Weinhuber 4616f3eb5384SStefan Weinhuber cqr = NULL; 4617f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4618f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4619ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4620ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4621f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4622f3eb5384SStefan Weinhuber first_rec, last_rec, 4623f3eb5384SStefan Weinhuber first_trk, last_trk, 4624f3eb5384SStefan Weinhuber first_offs, last_offs, 4625f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4626ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4627ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4628f3eb5384SStefan Weinhuber cqr = NULL; 4629f3eb5384SStefan Weinhuber } else if (use_prefix && 4630f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4631f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4632f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4633f3eb5384SStefan Weinhuber first_rec, last_rec, 4634f3eb5384SStefan Weinhuber first_trk, last_trk, 4635f3eb5384SStefan Weinhuber first_offs, last_offs, 4636f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4637ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4638ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4639f3eb5384SStefan Weinhuber cqr = NULL; 4640f3eb5384SStefan Weinhuber } 4641f3eb5384SStefan Weinhuber if (!cqr) 4642f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4643f3eb5384SStefan Weinhuber first_rec, last_rec, 4644f3eb5384SStefan Weinhuber first_trk, last_trk, 4645f3eb5384SStefan Weinhuber first_offs, last_offs, 4646f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4647f3eb5384SStefan Weinhuber return cqr; 4648f3eb5384SStefan Weinhuber } 4649f3eb5384SStefan Weinhuber 4650bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4651e4dbb0f2SStefan Haberland struct dasd_block *block, 4652e4dbb0f2SStefan Haberland struct request *req) 4653e4dbb0f2SStefan Haberland { 46549d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4655e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4656e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4657558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 46589d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 46599d2be0c1SJan Höppner struct dasd_device *basedev; 46609d2be0c1SJan Höppner struct req_iterator iter; 46619d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 46629d2be0c1SJan Höppner unsigned int first_offs; 46639d2be0c1SJan Höppner unsigned int trkcount; 46649d2be0c1SJan Höppner unsigned long *idaws; 46659d2be0c1SJan Höppner unsigned int size; 46669d2be0c1SJan Höppner unsigned char cmd; 46679d2be0c1SJan Höppner struct bio_vec bv; 46689d2be0c1SJan Höppner struct ccw1 *ccw; 46699d2be0c1SJan Höppner int use_prefix; 46709d2be0c1SJan Höppner void *data; 46719d2be0c1SJan Höppner char *dst; 4672e4dbb0f2SStefan Haberland 4673e4dbb0f2SStefan Haberland /* 4674e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4675558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4676558b9ef0SStefan Weinhuber * the request with dummy pages. 4677e4dbb0f2SStefan Haberland */ 4678558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4679558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4680558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4681558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4682558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4683558b9ef0SStefan Weinhuber basedev = block->base; 4684558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4685558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4686558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4687e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4688558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 46899d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4690e4dbb0f2SStefan Haberland } 4691e4dbb0f2SStefan Haberland 4692e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4693e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4694e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4695e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4696e4dbb0f2SStefan Haberland first_offs = 0; 4697e4dbb0f2SStefan Haberland 4698e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4699e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4700e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4701e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 47029d2be0c1SJan Höppner else 47039d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4704e4dbb0f2SStefan Haberland 4705e4dbb0f2SStefan Haberland /* 4706e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4707e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4708e4dbb0f2SStefan Haberland */ 4709e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4710e4dbb0f2SStefan Haberland 4711e4dbb0f2SStefan Haberland /* 47129d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 47139d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4714e4dbb0f2SStefan Haberland */ 47159d2be0c1SJan Höppner base_priv = basedev->private; 47169d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 47179d2be0c1SJan Höppner if (use_prefix) { 47189d2be0c1SJan Höppner cplength = 1 + trkcount; 47199d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 47209d2be0c1SJan Höppner } else { 47219d2be0c1SJan Höppner cplength = 2 + trkcount; 47229d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 47239d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 47249d2be0c1SJan Höppner } 47259d2be0c1SJan Höppner size = ALIGN(size, 8); 4726e4dbb0f2SStefan Haberland 47277bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4728e4dbb0f2SStefan Haberland 4729e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4730e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4731c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4732e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 47339d2be0c1SJan Höppner return cqr; 4734e4dbb0f2SStefan Haberland 47359d2be0c1SJan Höppner ccw = cqr->cpaddr; 47369d2be0c1SJan Höppner data = cqr->data; 47379d2be0c1SJan Höppner 47389d2be0c1SJan Höppner if (use_prefix) { 47399d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 47409d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 47419d2be0c1SJan Höppner } else { 47429d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 47439d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 47449d2be0c1SJan Höppner 47459d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 47469d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 47479d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4748e4dbb0f2SStefan Haberland } 4749e4dbb0f2SStefan Haberland 47509d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4751e4dbb0f2SStefan Haberland len_to_track_end = 0; 4752558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4753558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4754558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4755558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4756558b9ef0SStefan Weinhuber ccw->count = 57326; 4757558b9ef0SStefan Weinhuber /* 64k map to one track */ 4758558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4759558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4760558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4761558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4762558b9ef0SStefan Weinhuber ccw++; 4763558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4764558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4765558b9ef0SStefan Weinhuber } 4766e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 4767bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 47687988613bSKent Overstreet seg_len = bv.bv_len; 4769558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4770558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4771e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4772e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4773e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4774e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4775e4dbb0f2SStefan Haberland ccw->count = 57326; 4776e4dbb0f2SStefan Haberland /* 64k map to one track */ 4777e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4778e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4779e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4780e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4781e4dbb0f2SStefan Haberland ccw++; 4782e4dbb0f2SStefan Haberland } 4783e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4784e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4785e4dbb0f2SStefan Haberland } 4786558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4787558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4788e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4789e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4790e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4791e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4792e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4793e4dbb0f2SStefan Haberland cqr->block = block; 4794e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4795c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 47961f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 47971aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4798e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4799e4dbb0f2SStefan Haberland 4800e4dbb0f2SStefan Haberland return cqr; 4801e4dbb0f2SStefan Haberland } 4802e4dbb0f2SStefan Haberland 4803e4dbb0f2SStefan Haberland 48041da177e4SLinus Torvalds static int 48051da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 48061da177e4SLinus Torvalds { 48071da177e4SLinus Torvalds struct dasd_eckd_private *private; 48081da177e4SLinus Torvalds struct ccw1 *ccw; 48095705f702SNeilBrown struct req_iterator iter; 48107988613bSKent Overstreet struct bio_vec bv; 48111da177e4SLinus Torvalds char *dst, *cda; 48121da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 48131da177e4SLinus Torvalds sector_t recid; 48145705f702SNeilBrown int status; 48151da177e4SLinus Torvalds 48161da177e4SLinus Torvalds if (!dasd_page_cache) 48171da177e4SLinus Torvalds goto out; 4818543691a4SSebastian Ott private = cqr->block->base->private; 48198e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 48201da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 482183096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 48221da177e4SLinus Torvalds ccw = cqr->cpaddr; 48231da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 48241da177e4SLinus Torvalds ccw++; 48251da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 48261da177e4SLinus Torvalds ccw++; 48275705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4828bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 48297988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 48301da177e4SLinus Torvalds /* Skip locate record. */ 48311da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 48321da177e4SLinus Torvalds ccw++; 48331da177e4SLinus Torvalds if (dst) { 48341da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 48351da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 48361da177e4SLinus Torvalds else 48371da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 48381da177e4SLinus Torvalds if (dst != cda) { 48391da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 48407988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 48411da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 48421da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 48431da177e4SLinus Torvalds } 48441da177e4SLinus Torvalds dst = NULL; 48451da177e4SLinus Torvalds } 48461da177e4SLinus Torvalds ccw++; 48471da177e4SLinus Torvalds recid++; 48481da177e4SLinus Torvalds } 48491da177e4SLinus Torvalds } 48501da177e4SLinus Torvalds out: 48511da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 48528e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48531da177e4SLinus Torvalds return status; 48541da177e4SLinus Torvalds } 48551da177e4SLinus Torvalds 48568e09f215SStefan Weinhuber /* 4857f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 48588e09f215SStefan Weinhuber * 48598e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 48608e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 48618e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 48628e09f215SStefan Weinhuber */ 48638e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 48648e09f215SStefan Weinhuber { 48658e09f215SStefan Weinhuber struct ccw1 *ccw; 48668e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4867f3eb5384SStefan Weinhuber struct tcw *tcw; 4868f3eb5384SStefan Weinhuber struct tccb *tccb; 4869f3eb5384SStefan Weinhuber struct dcw *dcw; 48708e09f215SStefan Weinhuber 4871f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4872f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4873f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4874f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4875f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4876f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4877f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4878f3eb5384SStefan Weinhuber } else { 48798e09f215SStefan Weinhuber ccw = cqr->cpaddr; 48808e09f215SStefan Weinhuber pfxdata = cqr->data; 48818e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 48828e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 48838e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 48848e09f215SStefan Weinhuber } 48858e09f215SStefan Weinhuber } 4886f3eb5384SStefan Weinhuber } 48878e09f215SStefan Weinhuber 48888e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 48898e09f215SStefan Weinhuber 48908e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 48918e09f215SStefan Weinhuber struct dasd_block *block, 48928e09f215SStefan Weinhuber struct request *req) 48938e09f215SStefan Weinhuber { 48948e09f215SStefan Weinhuber struct dasd_eckd_private *private; 4895964ce509SStefan Haberland struct dasd_device *startdev; 48967e64db15SJan Höppner unsigned long flags; 4897964ce509SStefan Haberland struct dasd_ccw_req *cqr; 48988e09f215SStefan Weinhuber 48998e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 49008e09f215SStefan Weinhuber if (!startdev) 49018e09f215SStefan Weinhuber startdev = base; 4902543691a4SSebastian Ott private = startdev->private; 49038e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 49048e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 49058e09f215SStefan Weinhuber 49068e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 49078e09f215SStefan Weinhuber private->count++; 4908e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4909bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4910e4dbb0f2SStefan Haberland else 49118e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 49128e09f215SStefan Weinhuber if (IS_ERR(cqr)) 49138e09f215SStefan Weinhuber private->count--; 49148e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 49158e09f215SStefan Weinhuber return cqr; 49168e09f215SStefan Weinhuber } 49178e09f215SStefan Weinhuber 49188e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 49198e09f215SStefan Weinhuber struct request *req) 49208e09f215SStefan Weinhuber { 49218e09f215SStefan Weinhuber struct dasd_eckd_private *private; 49228e09f215SStefan Weinhuber unsigned long flags; 49238e09f215SStefan Weinhuber 49248e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4925543691a4SSebastian Ott private = cqr->memdev->private; 49268e09f215SStefan Weinhuber private->count--; 49278e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 49288e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 49298e09f215SStefan Weinhuber } 49308e09f215SStefan Weinhuber 49311da177e4SLinus Torvalds static int 49321da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 49331da177e4SLinus Torvalds struct dasd_information2_t * info) 49341da177e4SLinus Torvalds { 4935543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49361da177e4SLinus Torvalds 49371da177e4SLinus Torvalds info->label_block = 2; 49381da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 49391da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4940543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 49411da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4942543691a4SSebastian Ott sizeof(private->rdc_data)); 4943*542e30ceSStefan Haberland info->confdata_size = min_t(unsigned long, private->conf.len, 49444abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 4945*542e30ceSStefan Haberland memcpy(info->configuration_data, private->conf.data, 49464abb08c2SStefan Weinhuber info->confdata_size); 49471da177e4SLinus Torvalds return 0; 49481da177e4SLinus Torvalds } 49491da177e4SLinus Torvalds 49501da177e4SLinus Torvalds /* 49511da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 49521da177e4SLinus Torvalds */ 49531da177e4SLinus Torvalds 49541da177e4SLinus Torvalds /* 49551da177e4SLinus Torvalds * Release device ioctl. 49561da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 49571da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 49581da177e4SLinus Torvalds */ 49591da177e4SLinus Torvalds static int 49601107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 49611da177e4SLinus Torvalds { 49621da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 49631da177e4SLinus Torvalds int rc; 4964f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4965f932bceaSStefan Weinhuber int useglobal; 49661da177e4SLinus Torvalds 49671da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 49681da177e4SLinus Torvalds return -EACCES; 49691da177e4SLinus Torvalds 4970f932bceaSStefan Weinhuber useglobal = 0; 4971c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 49721da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4973f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4974f932bceaSStefan Weinhuber useglobal = 1; 4975f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4976f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4977f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4978f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4979f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4980f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4981f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 49821da177e4SLinus Torvalds } 4983f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4984f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4985f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4986f3eb5384SStefan Weinhuber ccw->count = 32; 4987f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 49888e09f215SStefan Weinhuber cqr->startdev = device; 49898e09f215SStefan Weinhuber cqr->memdev = device; 49901da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 49911c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4992336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 49931da177e4SLinus Torvalds cqr->expires = 2 * HZ; 49941aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 49951da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 49961da177e4SLinus Torvalds 49971da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 49985a27e60dSStefan Weinhuber if (!rc) 49995a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50001da177e4SLinus Torvalds 5001f932bceaSStefan Weinhuber if (useglobal) 5002f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5003f932bceaSStefan Weinhuber else 50048e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50051da177e4SLinus Torvalds return rc; 50061da177e4SLinus Torvalds } 50071da177e4SLinus Torvalds 50081da177e4SLinus Torvalds /* 50091da177e4SLinus Torvalds * Reserve device ioctl. 50101da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 50111da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 50121da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 50131da177e4SLinus Torvalds */ 50141da177e4SLinus Torvalds static int 50151107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 50161da177e4SLinus Torvalds { 50171da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50181da177e4SLinus Torvalds int rc; 5019f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5020f932bceaSStefan Weinhuber int useglobal; 50211da177e4SLinus Torvalds 50221da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50231da177e4SLinus Torvalds return -EACCES; 50241da177e4SLinus Torvalds 5025f932bceaSStefan Weinhuber useglobal = 0; 5026c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50271da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5028f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5029f932bceaSStefan Weinhuber useglobal = 1; 5030f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5031f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5032f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5033f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5034f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5035f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5036f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50371da177e4SLinus Torvalds } 5038f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5039f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 5040f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5041f3eb5384SStefan Weinhuber ccw->count = 32; 5042f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 50438e09f215SStefan Weinhuber cqr->startdev = device; 50448e09f215SStefan Weinhuber cqr->memdev = device; 50451da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50461c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5047336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50481da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50491aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50501da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50511da177e4SLinus Torvalds 50521da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50535a27e60dSStefan Weinhuber if (!rc) 50545a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50551da177e4SLinus Torvalds 5056f932bceaSStefan Weinhuber if (useglobal) 5057f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5058f932bceaSStefan Weinhuber else 50598e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50601da177e4SLinus Torvalds return rc; 50611da177e4SLinus Torvalds } 50621da177e4SLinus Torvalds 50631da177e4SLinus Torvalds /* 50641da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 50651da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 50661da177e4SLinus Torvalds * (unconditional reserve) 50671da177e4SLinus Torvalds */ 50681da177e4SLinus Torvalds static int 50691107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 50701da177e4SLinus Torvalds { 50711da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50721da177e4SLinus Torvalds int rc; 5073f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5074f932bceaSStefan Weinhuber int useglobal; 50751da177e4SLinus Torvalds 50761da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50771da177e4SLinus Torvalds return -EACCES; 50781da177e4SLinus Torvalds 5079f932bceaSStefan Weinhuber useglobal = 0; 5080c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50811da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5082f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5083f932bceaSStefan Weinhuber useglobal = 1; 5084f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5085f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5086f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5087f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5088f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5089f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5090f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50911da177e4SLinus Torvalds } 5092f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5093f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5094f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5095f3eb5384SStefan Weinhuber ccw->count = 32; 5096f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 50978e09f215SStefan Weinhuber cqr->startdev = device; 50988e09f215SStefan Weinhuber cqr->memdev = device; 50991da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 51001c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5101336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 51021da177e4SLinus Torvalds cqr->expires = 2 * HZ; 51031aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 51041da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 51051da177e4SLinus Torvalds 51061da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 51075a27e60dSStefan Weinhuber if (!rc) 51085a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 51091da177e4SLinus Torvalds 5110f932bceaSStefan Weinhuber if (useglobal) 5111f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5112f932bceaSStefan Weinhuber else 51138e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 51141da177e4SLinus Torvalds return rc; 51151da177e4SLinus Torvalds } 51161da177e4SLinus Torvalds 51171da177e4SLinus Torvalds /* 5118196339f1SStefan Weinhuber * SNID - Sense Path Group ID 5119196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 5120196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 5121196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 5122196339f1SStefan Weinhuber */ 5123196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 5124196339f1SStefan Weinhuber void __user *argp) 5125196339f1SStefan Weinhuber { 5126196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 5127196339f1SStefan Weinhuber int rc; 5128196339f1SStefan Weinhuber struct ccw1 *ccw; 5129196339f1SStefan Weinhuber int useglobal; 5130196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 5131196339f1SStefan Weinhuber 5132196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 5133196339f1SStefan Weinhuber return -EACCES; 5134196339f1SStefan Weinhuber 5135196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5136196339f1SStefan Weinhuber return -EFAULT; 5137196339f1SStefan Weinhuber 5138196339f1SStefan Weinhuber useglobal = 0; 5139196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5140c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 5141c5205f2fSSebastian Ott NULL); 5142196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 5143196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5144196339f1SStefan Weinhuber useglobal = 1; 5145196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5146196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5147196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5148196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5149196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5150196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5151196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 5152196339f1SStefan Weinhuber } 5153196339f1SStefan Weinhuber ccw = cqr->cpaddr; 5154196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 5155196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5156196339f1SStefan Weinhuber ccw->count = 12; 5157196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 5158196339f1SStefan Weinhuber cqr->startdev = device; 5159196339f1SStefan Weinhuber cqr->memdev = device; 5160196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5161196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 51625a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5163196339f1SStefan Weinhuber cqr->retries = 5; 5164196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 51651aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5166196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 5167196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 5168196339f1SStefan Weinhuber 5169196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 5170196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 5171196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5172196339f1SStefan Weinhuber rc = -EIO; 5173196339f1SStefan Weinhuber if (!rc) { 5174196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 5175196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5176196339f1SStefan Weinhuber rc = -EFAULT; 5177196339f1SStefan Weinhuber } 5178196339f1SStefan Weinhuber 5179196339f1SStefan Weinhuber if (useglobal) 5180196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5181196339f1SStefan Weinhuber else 5182196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 5183196339f1SStefan Weinhuber return rc; 5184196339f1SStefan Weinhuber } 5185196339f1SStefan Weinhuber 5186196339f1SStefan Weinhuber /* 51871da177e4SLinus Torvalds * Read performance statistics 51881da177e4SLinus Torvalds */ 51891da177e4SLinus Torvalds static int 51901107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 51911da177e4SLinus Torvalds { 51921da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 51931da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 51941da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 51951da177e4SLinus Torvalds struct ccw1 *ccw; 51961da177e4SLinus Torvalds int rc; 51971da177e4SLinus Torvalds 519868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 51991da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 52001da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 5201c5205f2fSSebastian Ott device, NULL); 52021da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5203fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 52041da177e4SLinus Torvalds "Could not allocate initialization request"); 52051da177e4SLinus Torvalds return PTR_ERR(cqr); 52061da177e4SLinus Torvalds } 52078e09f215SStefan Weinhuber cqr->startdev = device; 52088e09f215SStefan Weinhuber cqr->memdev = device; 52091da177e4SLinus Torvalds cqr->retries = 0; 5210eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 52111da177e4SLinus Torvalds cqr->expires = 10 * HZ; 52121da177e4SLinus Torvalds 52131da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 52141da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 52151da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 52161da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 52175d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 52181da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 52191da177e4SLinus Torvalds 52201da177e4SLinus Torvalds ccw = cqr->cpaddr; 52211da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 52221da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 52231da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 52241da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 52251da177e4SLinus Torvalds 52261da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 52271da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 52281da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 52291da177e4SLinus Torvalds 52301da177e4SLinus Torvalds ccw++; 52311da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 52321da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 52331da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 52341da177e4SLinus Torvalds 52351aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 52361da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 52371da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 52381da177e4SLinus Torvalds if (rc == 0) { 52391da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 52401da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 52411107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 52421107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 52431107ccfbSChristoph Hellwig rc = -EFAULT; 52441da177e4SLinus Torvalds } 52458e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 52461da177e4SLinus Torvalds return rc; 52471da177e4SLinus Torvalds } 52481da177e4SLinus Torvalds 52491da177e4SLinus Torvalds /* 52501da177e4SLinus Torvalds * Get attributes (cache operations) 52511da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 52521da177e4SLinus Torvalds */ 52531da177e4SLinus Torvalds static int 52541107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 52551da177e4SLinus Torvalds { 5256543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 52571107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 52581da177e4SLinus Torvalds int rc; 52591da177e4SLinus Torvalds 52601da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 52611da177e4SLinus Torvalds return -EACCES; 52621107ccfbSChristoph Hellwig if (!argp) 52631da177e4SLinus Torvalds return -EINVAL; 52641da177e4SLinus Torvalds 52651107ccfbSChristoph Hellwig rc = 0; 52661107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 52671107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 52681107ccfbSChristoph Hellwig rc = -EFAULT; 52691da177e4SLinus Torvalds 52701da177e4SLinus Torvalds return rc; 52711da177e4SLinus Torvalds } 52721da177e4SLinus Torvalds 52731da177e4SLinus Torvalds /* 52741da177e4SLinus Torvalds * Set attributes (cache operations) 52751da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 52761da177e4SLinus Torvalds */ 52771da177e4SLinus Torvalds static int 52781107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 52791da177e4SLinus Torvalds { 5280543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 52811da177e4SLinus Torvalds struct attrib_data_t attrib; 52821da177e4SLinus Torvalds 52831da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 52841da177e4SLinus Torvalds return -EACCES; 52851107ccfbSChristoph Hellwig if (!argp) 52861da177e4SLinus Torvalds return -EINVAL; 52871da177e4SLinus Torvalds 52881107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 52891da177e4SLinus Torvalds return -EFAULT; 52901da177e4SLinus Torvalds private->attrib = attrib; 52911da177e4SLinus Torvalds 5292fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5293fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 52941da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 52951da177e4SLinus Torvalds return 0; 52961da177e4SLinus Torvalds } 52971da177e4SLinus Torvalds 5298ab1d848fSNigel Hislop /* 5299ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5300ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5301ab1d848fSNigel Hislop */ 5302ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5303ab1d848fSNigel Hislop { 5304ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5305ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5306ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5307ab1d848fSNigel Hislop struct ccw1 *ccw; 530852898025SNigel Hislop char psf0, psf1; 5309ab1d848fSNigel Hislop int rc; 5310ab1d848fSNigel Hislop 531152898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 531252898025SNigel Hislop return -EACCES; 531352898025SNigel Hislop psf0 = psf1 = 0; 531452898025SNigel Hislop 5315ab1d848fSNigel Hislop /* Copy parms from caller */ 5316ab1d848fSNigel Hislop rc = -EFAULT; 5317ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5318ab1d848fSNigel Hislop goto out; 531992d62891SHeiko Carstens if (is_compat_task()) { 5320ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5321ab1d848fSNigel Hislop rc = -EINVAL; 5322f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5323ab1d848fSNigel Hislop goto out; 5324f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5325f8b06859SHeiko Carstens goto out; 5326f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5327f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5328ab1d848fSNigel Hislop } 53294a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 53304a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 53314a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 53324a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 53334a8ef699SStefan Haberland usrparm.psf_data_len); 53344a8ef699SStefan Haberland rc = -EINVAL; 53354a8ef699SStefan Haberland goto out; 53364a8ef699SStefan Haberland } 5337ab1d848fSNigel Hislop /* alloc I/O data area */ 5338ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5339ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5340ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5341ab1d848fSNigel Hislop rc = -ENOMEM; 5342ab1d848fSNigel Hislop goto out_free; 5343ab1d848fSNigel Hislop } 5344ab1d848fSNigel Hislop 5345ab1d848fSNigel Hislop /* get syscall header from user space */ 5346ab1d848fSNigel Hislop rc = -EFAULT; 5347ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5348ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5349ab1d848fSNigel Hislop usrparm.psf_data_len)) 5350ab1d848fSNigel Hislop goto out_free; 535152898025SNigel Hislop psf0 = psf_data[0]; 535252898025SNigel Hislop psf1 = psf_data[1]; 5353ab1d848fSNigel Hislop 5354ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5355c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5356ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5357fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5358ab1d848fSNigel Hislop "Could not allocate initialization request"); 5359ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5360ab1d848fSNigel Hislop goto out_free; 5361ab1d848fSNigel Hislop } 5362ab1d848fSNigel Hislop 5363ab1d848fSNigel Hislop cqr->startdev = device; 5364ab1d848fSNigel Hislop cqr->memdev = device; 5365ab1d848fSNigel Hislop cqr->retries = 3; 5366ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 53671aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5368ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5369ab1d848fSNigel Hislop 5370ab1d848fSNigel Hislop /* Build the ccws */ 5371ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5372ab1d848fSNigel Hislop 5373ab1d848fSNigel Hislop /* PSF ccw */ 5374ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5375ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5376ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5377ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 5378ab1d848fSNigel Hislop 5379ab1d848fSNigel Hislop ccw++; 5380ab1d848fSNigel Hislop 5381ab1d848fSNigel Hislop /* RSSD ccw */ 5382ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5383ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5384ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5385ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 5386ab1d848fSNigel Hislop 5387ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5388ab1d848fSNigel Hislop if (rc) 5389ab1d848fSNigel Hislop goto out_sfree; 5390ab1d848fSNigel Hislop 5391ab1d848fSNigel Hislop rc = -EFAULT; 5392ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5393ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5394ab1d848fSNigel Hislop goto out_sfree; 5395ab1d848fSNigel Hislop rc = 0; 5396ab1d848fSNigel Hislop 5397ab1d848fSNigel Hislop out_sfree: 5398ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5399ab1d848fSNigel Hislop out_free: 5400ab1d848fSNigel Hislop kfree(rssd_result); 5401ab1d848fSNigel Hislop kfree(psf_data); 5402ab1d848fSNigel Hislop out: 540352898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 540452898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 540552898025SNigel Hislop (int) psf0, (int) psf1, rc); 5406ab1d848fSNigel Hislop return rc; 5407ab1d848fSNigel Hislop } 5408ab1d848fSNigel Hislop 54091107ccfbSChristoph Hellwig static int 54108e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 54111107ccfbSChristoph Hellwig { 54128e09f215SStefan Weinhuber struct dasd_device *device = block->base; 54138e09f215SStefan Weinhuber 54141107ccfbSChristoph Hellwig switch (cmd) { 54151107ccfbSChristoph Hellwig case BIODASDGATTR: 54161107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 54171107ccfbSChristoph Hellwig case BIODASDSATTR: 54181107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 54191107ccfbSChristoph Hellwig case BIODASDPSRD: 54201107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 54211107ccfbSChristoph Hellwig case BIODASDRLSE: 54221107ccfbSChristoph Hellwig return dasd_eckd_release(device); 54231107ccfbSChristoph Hellwig case BIODASDRSRV: 54241107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 54251107ccfbSChristoph Hellwig case BIODASDSLCK: 54261107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5427196339f1SStefan Weinhuber case BIODASDSNID: 5428196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5429ab1d848fSNigel Hislop case BIODASDSYMMIO: 5430ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 54311107ccfbSChristoph Hellwig default: 54326b79d14eSHeiko Carstens return -ENOTTY; 54331107ccfbSChristoph Hellwig } 54341107ccfbSChristoph Hellwig } 54351107ccfbSChristoph Hellwig 54361da177e4SLinus Torvalds /* 5437445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5438445b5b49SHorst Hummel * and return number of printed chars. 5439445b5b49SHorst Hummel */ 54404d284cacSHeiko Carstens static int 5441445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5442445b5b49SHorst Hummel { 5443445b5b49SHorst Hummel int len, count; 5444445b5b49SHorst Hummel char *datap; 5445445b5b49SHorst Hummel 5446445b5b49SHorst Hummel len = 0; 5447445b5b49SHorst Hummel while (from <= to) { 5448773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5449445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5450445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5451445b5b49SHorst Hummel 5452445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5453445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5454445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 5455445b5b49SHorst Hummel else 5456445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 5457445b5b49SHorst Hummel 5458445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 5459445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 5460445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 5461445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 5462445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5463445b5b49SHorst Hummel } 5464445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5465445b5b49SHorst Hummel from++; 5466445b5b49SHorst Hummel } 5467445b5b49SHorst Hummel return len; 5468445b5b49SHorst Hummel } 5469445b5b49SHorst Hummel 5470fc19f381SStefan Haberland static void 5471aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5472aeec92caSStefan Haberland char *reason) 5473fc19f381SStefan Haberland { 5474fc19f381SStefan Haberland u64 *sense; 5475a5a0061fSStefan Weinhuber u64 *stat; 5476fc19f381SStefan Haberland 5477aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5478a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5479fc19f381SStefan Haberland if (sense) { 5480a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5481a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5482a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5483ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5484fc19f381SStefan Haberland } else { 5485a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5486a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5487a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5488fc19f381SStefan Haberland } 5489fc19f381SStefan Haberland } 5490fc19f381SStefan Haberland 5491445b5b49SHorst Hummel /* 54921da177e4SLinus Torvalds * Print sense data and related channel program. 54931da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 54941da177e4SLinus Torvalds */ 5495f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 54968e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 54971da177e4SLinus Torvalds { 54981da177e4SLinus Torvalds char *page; 5499445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5500445b5b49SHorst Hummel int len, sl, sct; 55011da177e4SLinus Torvalds 55021da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 55031da177e4SLinus Torvalds if (page == NULL) { 5504fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5505fc19f381SStefan Haberland "No memory to dump sense data\n"); 55061da177e4SLinus Torvalds return; 55071da177e4SLinus Torvalds } 5508445b5b49SHorst Hummel /* dump the sense data */ 5509773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 55101da177e4SLinus Torvalds " I/O status report for device %s:\n", 55112a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5512773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5513a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5514a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5515a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5516a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5517a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5518a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5519773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55201da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 55212a0217d5SKay Sievers dev_name(&device->cdev->dev), 552223d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 55231da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 55241da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5525773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55261da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 55271da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 55281da177e4SLinus Torvalds 55291da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 55301da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 55311da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 55321da177e4SLinus Torvalds } 55331da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 55341da177e4SLinus Torvalds } 55351da177e4SLinus Torvalds 55361da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 55371da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5538773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55391da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 55401da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 55411da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 55421da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 55431da177e4SLinus Torvalds } else { 55441da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5545773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55461da177e4SLinus Torvalds " 32 Byte: Format: %x " 55471da177e4SLinus Torvalds "Exception class %x\n", 55481da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 55491da177e4SLinus Torvalds } 55501da177e4SLinus Torvalds } else { 5551773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55521da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 55531da177e4SLinus Torvalds } 5554773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55551da177e4SLinus Torvalds 55568e09f215SStefan Weinhuber if (req) { 55578e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5558445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5559445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5560445b5b49SHorst Hummel first = req->cpaddr; 5561445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5562445b5b49SHorst Hummel to = min(first + 6, last); 5563773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 55641da177e4SLinus Torvalds " Related CP in req: %p\n", req); 5565445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 5566773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55671da177e4SLinus Torvalds 5568445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5569445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 55701da177e4SLinus Torvalds len = 0; 5571445b5b49SHorst Hummel from = ++to; 557223d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 557323d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5574445b5b49SHorst Hummel if (from < fail - 2) { 5575445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5576773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 55771da177e4SLinus Torvalds } 5578445b5b49SHorst Hummel to = min(fail + 1, last); 5579445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 55801da177e4SLinus Torvalds 5581445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5582445b5b49SHorst Hummel from = max(from, ++to); 5583445b5b49SHorst Hummel if (from < last - 1) { 5584445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5585773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 55861da177e4SLinus Torvalds } 5587445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 55881da177e4SLinus Torvalds if (len > 0) 5589773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55908e09f215SStefan Weinhuber } 55911da177e4SLinus Torvalds free_page((unsigned long) page); 55921da177e4SLinus Torvalds } 55931da177e4SLinus Torvalds 5594f3eb5384SStefan Weinhuber 5595f3eb5384SStefan Weinhuber /* 5596f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5597f3eb5384SStefan Weinhuber */ 5598f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5599f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5600f3eb5384SStefan Weinhuber { 5601f3eb5384SStefan Weinhuber char *page; 5602f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5603f3eb5384SStefan Weinhuber struct tsb *tsb; 5604ef19298bSStefan Weinhuber u8 *sense, *rcq; 5605f3eb5384SStefan Weinhuber 5606f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5607f3eb5384SStefan Weinhuber if (page == NULL) { 5608fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5609f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5610f3eb5384SStefan Weinhuber return; 5611f3eb5384SStefan Weinhuber } 5612f3eb5384SStefan Weinhuber /* dump the sense data */ 5613773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5614f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5615f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5616773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5617a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5618a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5619a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5620a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5621a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5622a521b048SStefan Haberland irb->scsw.tm.fcxs, 5623a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5624a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5625773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5626f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5627f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5628f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5629f3eb5384SStefan Weinhuber 5630f3eb5384SStefan Weinhuber tsb = NULL; 5631f3eb5384SStefan Weinhuber sense = NULL; 5632a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5633f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5634f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5635f3eb5384SStefan Weinhuber 5636b8fde722SStefan Haberland if (tsb) { 5637773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5638f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5639773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5640f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5641773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5642f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5643773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5644f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5645f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5646773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5647f3eb5384SStefan Weinhuber " residual %d\n", residual); 5648f3eb5384SStefan Weinhuber 5649f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5650f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5651773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5652f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5653f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5654773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5655f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5656f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5657773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5658f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5659f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5660773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5661f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5662f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5663773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5664f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5665f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5666f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5667f3eb5384SStefan Weinhuber break; 5668f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5669773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5670f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5671ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5672773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5673ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5674ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5675ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5676f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5677f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5678ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5679f3eb5384SStefan Weinhuber } 5680f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5681f3eb5384SStefan Weinhuber } 5682f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5683f3eb5384SStefan Weinhuber break; 5684f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5685773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 56868693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5687f3eb5384SStefan Weinhuber break; 5688f3eb5384SStefan Weinhuber } 5689f3eb5384SStefan Weinhuber 5690f3eb5384SStefan Weinhuber if (sense) { 5691f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5692773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5693f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5694f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5695f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5696f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5697f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5698f3eb5384SStefan Weinhuber } 5699f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5700f3eb5384SStefan Weinhuber } 5701f3eb5384SStefan Weinhuber 5702f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5703f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5704773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5705f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5706f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5707f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5708f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5709f3eb5384SStefan Weinhuber } else { 5710f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5711773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5712f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5713f3eb5384SStefan Weinhuber "Exception class %x\n", 5714f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5715f3eb5384SStefan Weinhuber } 5716f3eb5384SStefan Weinhuber } else { 5717773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5718f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5719f3eb5384SStefan Weinhuber } 5720f3eb5384SStefan Weinhuber } else { 5721773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5722f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5723f3eb5384SStefan Weinhuber } 5724773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5725f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5726f3eb5384SStefan Weinhuber } 5727f3eb5384SStefan Weinhuber 5728f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5729f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5730f3eb5384SStefan Weinhuber { 57318fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 57328fd57520SJan Höppner 57338fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 57348fd57520SJan Höppner /* 57358fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 57368fd57520SJan Höppner * error might be expected and log messages shouldn't be written 57378fd57520SJan Höppner * then. Check if the according suppress bit is set. 57388fd57520SJan Höppner */ 57398fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 57408fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 57418fd57520SJan Höppner return; 57428fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 57438fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 57448fd57520SJan Höppner return; 57458fd57520SJan Höppner 5746f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 57478fd57520SJan Höppner } else { 57488fd57520SJan Höppner /* 5749ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5750ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5751ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 57528fd57520SJan Höppner */ 5753ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5754ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5755ab24fbd3SStefan Haberland return; 5756ab24fbd3SStefan Haberland 57578fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 57588fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 57598fd57520SJan Höppner return; 57608fd57520SJan Höppner 5761f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5762f3eb5384SStefan Weinhuber } 57638fd57520SJan Höppner } 5764f3eb5384SStefan Weinhuber 5765501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5766501183f2SStefan Haberland { 5767543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5768501183f2SStefan Haberland int rc, old_base; 57692dedf0d9SStefan Haberland char print_uid[60]; 57702dedf0d9SStefan Haberland struct dasd_uid uid; 57712dedf0d9SStefan Haberland unsigned long flags; 5772501183f2SStefan Haberland 577359a9ed5fSStefan Haberland /* 577459a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 577559a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 577659a9ed5fSStefan Haberland */ 577759a9ed5fSStefan Haberland dasd_alias_remove_device(device); 577859a9ed5fSStefan Haberland 57792dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5780501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 57812dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 57822dedf0d9SStefan Haberland 5783501183f2SStefan Haberland /* Read Configuration Data */ 5784501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5785501183f2SStefan Haberland if (rc) 5786501183f2SStefan Haberland goto out_err; 5787501183f2SStefan Haberland 578874e2f211SStefan Haberland dasd_eckd_read_fc_security(device); 578974e2f211SStefan Haberland 57902dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5791501183f2SStefan Haberland if (rc) 5792501183f2SStefan Haberland goto out_err; 5793501183f2SStefan Haberland /* 5794501183f2SStefan Haberland * update unit address configuration and 5795501183f2SStefan Haberland * add device to alias management 5796501183f2SStefan Haberland */ 5797501183f2SStefan Haberland dasd_alias_update_add_device(device); 5798501183f2SStefan Haberland 57992dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 58002dedf0d9SStefan Haberland 58012dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 5802*542e30ceSStefan Haberland dasd_eckd_get_uid_string(&private->conf, print_uid); 5803501183f2SStefan Haberland dev_info(&device->cdev->dev, 5804501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 58052dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5806501183f2SStefan Haberland } 5807501183f2SStefan Haberland return 0; 5808501183f2SStefan Haberland 5809501183f2SStefan Haberland out_err: 5810501183f2SStefan Haberland return -1; 5811501183f2SStefan Haberland } 5812501183f2SStefan Haberland 58135db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 58145db8440cSStefan Haberland struct dasd_rssd_messages *messages, 58155db8440cSStefan Haberland __u8 lpum) 58165db8440cSStefan Haberland { 58175db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 58185db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 58195db8440cSStefan Haberland struct dasd_ccw_req *cqr; 58205db8440cSStefan Haberland struct ccw1 *ccw; 58215db8440cSStefan Haberland int rc; 58225db8440cSStefan Haberland 58235db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 58245db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 58255db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5826c5205f2fSSebastian Ott device, NULL); 58275db8440cSStefan Haberland if (IS_ERR(cqr)) { 58285db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58295db8440cSStefan Haberland "Could not allocate read message buffer request"); 58305db8440cSStefan Haberland return PTR_ERR(cqr); 58315db8440cSStefan Haberland } 58325db8440cSStefan Haberland 5833af775210SStefan Haberland cqr->lpm = lpum; 5834af775210SStefan Haberland retry: 58355db8440cSStefan Haberland cqr->startdev = device; 58365db8440cSStefan Haberland cqr->memdev = device; 58375db8440cSStefan Haberland cqr->block = NULL; 58385db8440cSStefan Haberland cqr->expires = 10 * HZ; 58395db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5840b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5841b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5842b179b037SStefan Haberland * do basic erp */ 5843b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5844b179b037SStefan Haberland cqr->retries = 256; 58455db8440cSStefan Haberland 58465db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 58475db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58485db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 58495db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 58505db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 58515db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 58525db8440cSStefan Haberland 58535db8440cSStefan Haberland ccw = cqr->cpaddr; 58545db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 58555db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 58565db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 58575db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58585db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 58595db8440cSStefan Haberland 58605db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 58615db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 58625db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 58635db8440cSStefan Haberland 58645db8440cSStefan Haberland ccw++; 58655db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 58665db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 58675db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58685db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 58695db8440cSStefan Haberland 58705db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 58715db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 58725db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 58735db8440cSStefan Haberland if (rc == 0) { 58745db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58755db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 58765db8440cSStefan Haberland (prssdp + 1); 58775db8440cSStefan Haberland memcpy(messages, message_buf, 58785db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5879af775210SStefan Haberland } else if (cqr->lpm) { 5880af775210SStefan Haberland /* 5881af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5882af775210SStefan Haberland * but instead we get the required information on any path 5883af775210SStefan Haberland * so retry with open path mask 5884af775210SStefan Haberland */ 5885af775210SStefan Haberland cqr->lpm = 0; 5886af775210SStefan Haberland goto retry; 58875db8440cSStefan Haberland } else 58885db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 58895db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 58905db8440cSStefan Haberland , rc); 58915db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 58925db8440cSStefan Haberland return rc; 58935db8440cSStefan Haberland } 58945db8440cSStefan Haberland 58955a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 58965a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 58975a3b7b11SStefan Haberland { 58985a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 58995a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 59005a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 59015a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 59025a3b7b11SStefan Haberland struct ccw1 *ccw; 59035a3b7b11SStefan Haberland int rc; 59045a3b7b11SStefan Haberland 59055a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 59065a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 59075a3b7b11SStefan Haberland return -EOPNOTSUPP; 59085a3b7b11SStefan Haberland 5909ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5910ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5911ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5912ccd53fa2SStefan Haberland 59135a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 59145a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5915c5205f2fSSebastian Ott device, NULL); 59165a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 59175a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59185a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 59195a3b7b11SStefan Haberland return PTR_ERR(cqr); 59205a3b7b11SStefan Haberland } 59215a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 59225a3b7b11SStefan Haberland if (!host_access) { 59235a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 59245a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59255a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 59265a3b7b11SStefan Haberland return -ENOMEM; 59275a3b7b11SStefan Haberland } 59285a3b7b11SStefan Haberland cqr->startdev = device; 59295a3b7b11SStefan Haberland cqr->memdev = device; 59305a3b7b11SStefan Haberland cqr->block = NULL; 59315a3b7b11SStefan Haberland cqr->retries = 256; 59325a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 59335a3b7b11SStefan Haberland 59345a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 59355a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59365a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 59375a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 59385a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 59395a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 5940*542e30ceSStefan Haberland prssdp->lss = private->conf.ned->ID; 5941*542e30ceSStefan Haberland prssdp->volume = private->conf.ned->unit_addr; 59425a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 59435a3b7b11SStefan Haberland 59445a3b7b11SStefan Haberland ccw = cqr->cpaddr; 59455a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59465a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 59475a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 59485a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59495a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 59505a3b7b11SStefan Haberland 59515a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 59525a3b7b11SStefan Haberland ccw++; 59535a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 59545a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 59555a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59565a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 59575a3b7b11SStefan Haberland 59585a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 59595a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5960ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5961ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5962f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 59635a3b7b11SStefan Haberland if (rc == 0) { 59645a3b7b11SStefan Haberland *data = *host_access; 59655a3b7b11SStefan Haberland } else { 59665a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 59675a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 59685a3b7b11SStefan Haberland rc); 59695a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 59705a3b7b11SStefan Haberland } 59715a3b7b11SStefan Haberland 59725a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59735a3b7b11SStefan Haberland kfree(host_access); 59745a3b7b11SStefan Haberland return rc; 59755a3b7b11SStefan Haberland } 59765a3b7b11SStefan Haberland /* 59775a3b7b11SStefan Haberland * return number of grouped devices 59785a3b7b11SStefan Haberland */ 59795a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 59805a3b7b11SStefan Haberland { 59815a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 59825a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 59835a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 59845a3b7b11SStefan Haberland int count = 0; 59855a3b7b11SStefan Haberland int rc, i; 59865a3b7b11SStefan Haberland 59875a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 59885a3b7b11SStefan Haberland if (!access) { 59895a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59905a3b7b11SStefan Haberland "Could not allocate access buffer"); 59915a3b7b11SStefan Haberland return -ENOMEM; 59925a3b7b11SStefan Haberland } 59935a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 59945a3b7b11SStefan Haberland if (rc) { 59955a3b7b11SStefan Haberland kfree(access); 59965a3b7b11SStefan Haberland return rc; 59975a3b7b11SStefan Haberland } 59985a3b7b11SStefan Haberland 59995a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60005a3b7b11SStefan Haberland access->host_access_information; 60015a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 60025a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 60035a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 60045a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 60055a3b7b11SStefan Haberland count++; 60065a3b7b11SStefan Haberland } 60075a3b7b11SStefan Haberland 60085a3b7b11SStefan Haberland kfree(access); 60095a3b7b11SStefan Haberland return count; 60105a3b7b11SStefan Haberland } 60115a3b7b11SStefan Haberland 60125a3b7b11SStefan Haberland /* 60135a3b7b11SStefan Haberland * write host access information to a sequential file 60145a3b7b11SStefan Haberland */ 60155a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 60165a3b7b11SStefan Haberland { 60175a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60185a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60195a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60205a3b7b11SStefan Haberland char sysplex[9] = ""; 6021c7848e14SChristophe JAILLET int rc, i; 60225a3b7b11SStefan Haberland 60235a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60245a3b7b11SStefan Haberland if (!access) { 60255a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60265a3b7b11SStefan Haberland "Could not allocate access buffer"); 60275a3b7b11SStefan Haberland return -ENOMEM; 60285a3b7b11SStefan Haberland } 60295a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60305a3b7b11SStefan Haberland if (rc) { 60315a3b7b11SStefan Haberland kfree(access); 60325a3b7b11SStefan Haberland return rc; 60335a3b7b11SStefan Haberland } 60345a3b7b11SStefan Haberland 60355a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60365a3b7b11SStefan Haberland access->host_access_information; 60375a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 60385a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 60395a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 60405a3b7b11SStefan Haberland /* PGID */ 6041c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 60425a3b7b11SStefan Haberland /* FLAGS */ 60435a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 60445a3b7b11SStefan Haberland /* SYSPLEX NAME */ 60455a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 60465a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 60475a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 60485a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 60495a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 60505a3b7b11SStefan Haberland /* TIMESTAMP */ 60515a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 60525a3b7b11SStefan Haberland entry->timestamp); 60535a3b7b11SStefan Haberland } 60545a3b7b11SStefan Haberland kfree(access); 60555a3b7b11SStefan Haberland 60565a3b7b11SStefan Haberland return 0; 60575a3b7b11SStefan Haberland } 60585a3b7b11SStefan Haberland 60595db8440cSStefan Haberland /* 60605db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 60615db8440cSStefan Haberland */ 60625db8440cSStefan Haberland static int 60635db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6064a521b048SStefan Haberland __u32 message_id, __u8 lpum) 60655db8440cSStefan Haberland { 60665db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 6067a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 60685db8440cSStefan Haberland struct dasd_ccw_req *cqr; 60695db8440cSStefan Haberland struct ccw1 *ccw; 60705db8440cSStefan Haberland int rc; 60715db8440cSStefan Haberland 60725db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 60735db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 6074c5205f2fSSebastian Ott device, NULL); 60755db8440cSStefan Haberland 60765db8440cSStefan Haberland if (IS_ERR(cqr)) { 60775db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 60785db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 60795db8440cSStefan Haberland return PTR_ERR(cqr); 60805db8440cSStefan Haberland } 60815db8440cSStefan Haberland 60825db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 60835db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 60845db8440cSStefan Haberland psf_cuir->cc = response; 6085a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 60865db8440cSStefan Haberland psf_cuir->message_id = message_id; 6087a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 6088a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 60895db8440cSStefan Haberland ccw = cqr->cpaddr; 60905db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 60915db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 6092b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 60935db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 60945db8440cSStefan Haberland 60955db8440cSStefan Haberland cqr->startdev = device; 60965db8440cSStefan Haberland cqr->memdev = device; 60975db8440cSStefan Haberland cqr->block = NULL; 60985db8440cSStefan Haberland cqr->retries = 256; 60995db8440cSStefan Haberland cqr->expires = 10*HZ; 61005db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 61015db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 6102b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 61035db8440cSStefan Haberland 61045db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 61055db8440cSStefan Haberland 61065db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 61075db8440cSStefan Haberland return rc; 61085db8440cSStefan Haberland } 61095db8440cSStefan Haberland 6110b179b037SStefan Haberland /* 6111b179b037SStefan Haberland * return configuration data that is referenced by record selector 6112b179b037SStefan Haberland * if a record selector is specified or per default return the 6113b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 6114b179b037SStefan Haberland */ 6115b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6116b179b037SStefan Haberland __u8 lpum, 6117b179b037SStefan Haberland struct dasd_cuir_message *cuir) 61185db8440cSStefan Haberland { 6119b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6120b179b037SStefan Haberland int path, pos; 61215db8440cSStefan Haberland 6122b179b037SStefan Haberland if (cuir->record_selector == 0) 6123b179b037SStefan Haberland goto out; 6124b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6125c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 6126b179b037SStefan Haberland if (conf_data->gneq.record_selector == 6127b179b037SStefan Haberland cuir->record_selector) 6128b179b037SStefan Haberland return conf_data; 61295db8440cSStefan Haberland } 6130b179b037SStefan Haberland out: 6131c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 61325db8440cSStefan Haberland } 61335db8440cSStefan Haberland 61345db8440cSStefan Haberland /* 6135b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6136b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6137b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6138b179b037SStefan Haberland * 6139b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6140b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6141b179b037SStefan Haberland * on. 6142b179b037SStefan Haberland */ 6143b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6144b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6145b179b037SStefan Haberland { 6146b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6147b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6148b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6149b179b037SStefan Haberland unsigned int pos, path; 6150b179b037SStefan Haberland char *ref_gneq, *gneq; 6151b179b037SStefan Haberland char *ref_ned, *ned; 6152b179b037SStefan Haberland int tbcpm = 0; 6153b179b037SStefan Haberland 6154b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6155b179b037SStefan Haberland the attention message was presented on */ 6156b179b037SStefan Haberland if (!cuir->ned_map || 6157b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6158b179b037SStefan Haberland return lpum; 6159b179b037SStefan Haberland 6160b179b037SStefan Haberland /* get reference conf data */ 6161b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6162b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6163b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6164b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6165b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6166b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6167b179b037SStefan Haberland mask = cuir->neq_map[2]; 6168b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6169b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6170b179b037SStefan Haberland 6171c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6172b179b037SStefan Haberland /* initialise data per path */ 6173b179b037SStefan Haberland bitmask = mask; 6174c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6175b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6176b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6177b179b037SStefan Haberland /* compare reference ned and per path ned */ 6178b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6179b179b037SStefan Haberland continue; 6180b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6181b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6182b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6183b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6184b179b037SStefan Haberland while (bitmask) { 6185b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6186b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6187b179b037SStefan Haberland != 0) 6188b179b037SStefan Haberland break; 6189b179b037SStefan Haberland clear_bit(pos, &bitmask); 6190b179b037SStefan Haberland } 6191b179b037SStefan Haberland if (bitmask) 6192b179b037SStefan Haberland continue; 6193b179b037SStefan Haberland /* device and path match the reference values 6194b179b037SStefan Haberland add path to CUIR scope */ 6195c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6196b179b037SStefan Haberland } 6197b179b037SStefan Haberland return tbcpm; 6198b179b037SStefan Haberland } 6199b179b037SStefan Haberland 6200b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6201a521b048SStefan Haberland unsigned long paths, int action) 6202b179b037SStefan Haberland { 6203b179b037SStefan Haberland int pos; 6204b179b037SStefan Haberland 6205b179b037SStefan Haberland while (paths) { 6206b179b037SStefan Haberland /* get position of bit in mask */ 6207a521b048SStefan Haberland pos = 8 - ffs(paths); 6208b179b037SStefan Haberland /* get channel path descriptor from this position */ 6209b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6210a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6211a521b048SStefan Haberland device->path[pos].cssid, 6212a521b048SStefan Haberland device->path[pos].chpid); 6213b179b037SStefan Haberland else if (action == CUIR_RESUME) 6214a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6215a521b048SStefan Haberland device->path[pos].cssid, 6216a521b048SStefan Haberland device->path[pos].chpid); 6217a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6218b179b037SStefan Haberland } 6219b179b037SStefan Haberland } 6220b179b037SStefan Haberland 6221b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6222b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6223b179b037SStefan Haberland { 6224b179b037SStefan Haberland unsigned long tbcpm; 6225b179b037SStefan Haberland 6226b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6227b179b037SStefan Haberland /* nothing to do if path is not in use */ 6228c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6229b179b037SStefan Haberland return 0; 6230c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6231b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6232b179b037SStefan Haberland return error */ 6233b179b037SStefan Haberland return -EINVAL; 6234b179b037SStefan Haberland } 6235b179b037SStefan Haberland /* remove device from operational path mask */ 6236c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6237c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6238b179b037SStefan Haberland return tbcpm; 6239b179b037SStefan Haberland } 6240b179b037SStefan Haberland 6241b179b037SStefan Haberland /* 6242b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6243b179b037SStefan Haberland * return an error if the last path to a device would be removed 62445db8440cSStefan Haberland * 62455db8440cSStefan Haberland * if only part of the devices are quiesced and an error 62465db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 62475db8440cSStefan Haberland * notify the already set offline devices again 62485db8440cSStefan Haberland */ 62495db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6250b179b037SStefan Haberland struct dasd_cuir_message *cuir) 62515db8440cSStefan Haberland { 6252543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 62535db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 62545db8440cSStefan Haberland struct dasd_device *dev, *n; 6255b179b037SStefan Haberland unsigned long paths = 0; 6256b179b037SStefan Haberland unsigned long flags; 6257b179b037SStefan Haberland int tbcpm; 62585db8440cSStefan Haberland 62595db8440cSStefan Haberland /* active devices */ 6260b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 62615db8440cSStefan Haberland alias_list) { 6262b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6263b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6264b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6265b179b037SStefan Haberland if (tbcpm < 0) 6266b179b037SStefan Haberland goto out_err; 6267b179b037SStefan Haberland paths |= tbcpm; 62685db8440cSStefan Haberland } 62695db8440cSStefan Haberland /* inactive devices */ 6270b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 62715db8440cSStefan Haberland alias_list) { 6272b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6273b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6274b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6275b179b037SStefan Haberland if (tbcpm < 0) 6276b179b037SStefan Haberland goto out_err; 6277b179b037SStefan Haberland paths |= tbcpm; 62785db8440cSStefan Haberland } 62795db8440cSStefan Haberland /* devices in PAV groups */ 62805db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 62815db8440cSStefan Haberland &private->lcu->grouplist, group) { 62825db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 62835db8440cSStefan Haberland alias_list) { 6284b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6285b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6286b179b037SStefan Haberland spin_unlock_irqrestore( 6287b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6288b179b037SStefan Haberland if (tbcpm < 0) 6289b179b037SStefan Haberland goto out_err; 6290b179b037SStefan Haberland paths |= tbcpm; 62915db8440cSStefan Haberland } 62925db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 62935db8440cSStefan Haberland alias_list) { 6294b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6295b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6296b179b037SStefan Haberland spin_unlock_irqrestore( 6297b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6298b179b037SStefan Haberland if (tbcpm < 0) 6299b179b037SStefan Haberland goto out_err; 6300b179b037SStefan Haberland paths |= tbcpm; 63015db8440cSStefan Haberland } 63025db8440cSStefan Haberland } 6303b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6304a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6305b179b037SStefan Haberland return 0; 6306b179b037SStefan Haberland out_err: 6307b179b037SStefan Haberland return tbcpm; 63085db8440cSStefan Haberland } 63095db8440cSStefan Haberland 63105db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6311b179b037SStefan Haberland struct dasd_cuir_message *cuir) 63125db8440cSStefan Haberland { 6313543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 63145db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 63155db8440cSStefan Haberland struct dasd_device *dev, *n; 6316b179b037SStefan Haberland unsigned long paths = 0; 6317b179b037SStefan Haberland int tbcpm; 63185db8440cSStefan Haberland 63195db8440cSStefan Haberland /* 63205db8440cSStefan Haberland * the path may have been added through a generic path event before 63215db8440cSStefan Haberland * only trigger path verification if the path is not already in use 63225db8440cSStefan Haberland */ 63235db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63245db8440cSStefan Haberland &private->lcu->active_devices, 63255db8440cSStefan Haberland alias_list) { 6326b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6327b179b037SStefan Haberland paths |= tbcpm; 6328c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6329c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63305db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63315db8440cSStefan Haberland } 63325db8440cSStefan Haberland } 63335db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63345db8440cSStefan Haberland &private->lcu->inactive_devices, 63355db8440cSStefan Haberland alias_list) { 6336b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6337b179b037SStefan Haberland paths |= tbcpm; 6338c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6339c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63405db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63415db8440cSStefan Haberland } 63425db8440cSStefan Haberland } 63435db8440cSStefan Haberland /* devices in PAV groups */ 63445db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 63455db8440cSStefan Haberland &private->lcu->grouplist, 63465db8440cSStefan Haberland group) { 63475db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63485db8440cSStefan Haberland &pavgroup->baselist, 63495db8440cSStefan Haberland alias_list) { 6350b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6351b179b037SStefan Haberland paths |= tbcpm; 6352c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6353c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63545db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63555db8440cSStefan Haberland } 63565db8440cSStefan Haberland } 63575db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63585db8440cSStefan Haberland &pavgroup->aliaslist, 63595db8440cSStefan Haberland alias_list) { 6360b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6361b179b037SStefan Haberland paths |= tbcpm; 6362c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6363c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63645db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63655db8440cSStefan Haberland } 63665db8440cSStefan Haberland } 63675db8440cSStefan Haberland } 6368b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6369a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6370b179b037SStefan Haberland return 0; 63715db8440cSStefan Haberland } 63725db8440cSStefan Haberland 63735db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 63745db8440cSStefan Haberland __u8 lpum) 63755db8440cSStefan Haberland { 63765db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6377a521b048SStefan Haberland int response; 63785db8440cSStefan Haberland 6379b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6380b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6381b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6382b179b037SStefan Haberland ((u32 *)cuir)[3]); 63835db8440cSStefan Haberland 63845db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 63855db8440cSStefan Haberland /* quiesce */ 6386a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6387b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6388b179b037SStefan Haberland else 6389b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 63905db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 63915db8440cSStefan Haberland /* resume */ 6392a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6393b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 63945db8440cSStefan Haberland } else 63955db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 63965db8440cSStefan Haberland 6397b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6398a521b048SStefan Haberland cuir->message_id, lpum); 6399b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6400b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6401b179b037SStefan Haberland cuir->message_id); 6402b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6403b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 64045db8440cSStefan Haberland } 64055db8440cSStefan Haberland 64069e12e54cSJan Höppner static void dasd_eckd_oos_resume(struct dasd_device *device) 64079e12e54cSJan Höppner { 64089e12e54cSJan Höppner struct dasd_eckd_private *private = device->private; 64099e12e54cSJan Höppner struct alias_pav_group *pavgroup, *tempgroup; 64109e12e54cSJan Höppner struct dasd_device *dev, *n; 64119e12e54cSJan Höppner unsigned long flags; 64129e12e54cSJan Höppner 64139e12e54cSJan Höppner spin_lock_irqsave(&private->lcu->lock, flags); 64149e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 64159e12e54cSJan Höppner alias_list) { 64169e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64179e12e54cSJan Höppner dasd_generic_space_avail(dev); 64189e12e54cSJan Höppner } 64199e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 64209e12e54cSJan Höppner alias_list) { 64219e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64229e12e54cSJan Höppner dasd_generic_space_avail(dev); 64239e12e54cSJan Höppner } 64249e12e54cSJan Höppner /* devices in PAV groups */ 64259e12e54cSJan Höppner list_for_each_entry_safe(pavgroup, tempgroup, 64269e12e54cSJan Höppner &private->lcu->grouplist, 64279e12e54cSJan Höppner group) { 64289e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->baselist, 64299e12e54cSJan Höppner alias_list) { 64309e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64319e12e54cSJan Höppner dasd_generic_space_avail(dev); 64329e12e54cSJan Höppner } 64339e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 64349e12e54cSJan Höppner alias_list) { 64359e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64369e12e54cSJan Höppner dasd_generic_space_avail(dev); 64379e12e54cSJan Höppner } 64389e12e54cSJan Höppner } 64399e12e54cSJan Höppner spin_unlock_irqrestore(&private->lcu->lock, flags); 64409e12e54cSJan Höppner } 64419e12e54cSJan Höppner 64429e12e54cSJan Höppner static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 64439e12e54cSJan Höppner __u8 lpum) 64449e12e54cSJan Höppner { 64459e12e54cSJan Höppner struct dasd_oos_message *oos = messages; 64469e12e54cSJan Höppner 64479e12e54cSJan Höppner switch (oos->code) { 64489e12e54cSJan Höppner case REPO_WARN: 64499e12e54cSJan Höppner case POOL_WARN: 64509e12e54cSJan Höppner dev_warn(&device->cdev->dev, 64519e12e54cSJan Höppner "Extent pool usage has reached a critical value\n"); 64529e12e54cSJan Höppner dasd_eckd_oos_resume(device); 64539e12e54cSJan Höppner break; 64549e12e54cSJan Höppner case REPO_EXHAUST: 64559e12e54cSJan Höppner case POOL_EXHAUST: 64569e12e54cSJan Höppner dev_warn(&device->cdev->dev, 64579e12e54cSJan Höppner "Extent pool is exhausted\n"); 64589e12e54cSJan Höppner break; 64599e12e54cSJan Höppner case REPO_RELIEVE: 64609e12e54cSJan Höppner case POOL_RELIEVE: 64619e12e54cSJan Höppner dev_info(&device->cdev->dev, 64629e12e54cSJan Höppner "Extent pool physical space constraint has been relieved\n"); 64639e12e54cSJan Höppner break; 64649e12e54cSJan Höppner } 64659e12e54cSJan Höppner 64669e12e54cSJan Höppner /* In any case, update related data */ 64679e12e54cSJan Höppner dasd_eckd_read_ext_pool_info(device); 64689e12e54cSJan Höppner 64699e12e54cSJan Höppner /* to make sure there is no attention left schedule work again */ 64709e12e54cSJan Höppner device->discipline->check_attention(device, lpum); 64719e12e54cSJan Höppner } 64729e12e54cSJan Höppner 64735db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 64745db8440cSStefan Haberland { 64755db8440cSStefan Haberland struct check_attention_work_data *data; 64765db8440cSStefan Haberland struct dasd_rssd_messages *messages; 64775db8440cSStefan Haberland struct dasd_device *device; 64785db8440cSStefan Haberland int rc; 64795db8440cSStefan Haberland 64805db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 64815db8440cSStefan Haberland device = data->device; 64825db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 64835db8440cSStefan Haberland if (!messages) { 64845db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 64855db8440cSStefan Haberland "Could not allocate attention message buffer"); 64865db8440cSStefan Haberland goto out; 64875db8440cSStefan Haberland } 64885db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 64895db8440cSStefan Haberland if (rc) 64905db8440cSStefan Haberland goto out; 64919e12e54cSJan Höppner 64925db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 64935db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 64945db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 64959e12e54cSJan Höppner if (messages->length == ATTENTION_LENGTH_OOS && 64969e12e54cSJan Höppner messages->format == ATTENTION_FORMAT_OOS) 64979e12e54cSJan Höppner dasd_eckd_handle_oos(device, messages, data->lpum); 64989e12e54cSJan Höppner 64995db8440cSStefan Haberland out: 65005db8440cSStefan Haberland dasd_put_device(device); 65015db8440cSStefan Haberland kfree(messages); 65025db8440cSStefan Haberland kfree(data); 65035db8440cSStefan Haberland } 65045db8440cSStefan Haberland 65055db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 65065db8440cSStefan Haberland { 65075db8440cSStefan Haberland struct check_attention_work_data *data; 65085db8440cSStefan Haberland 65095db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 65105db8440cSStefan Haberland if (!data) 65115db8440cSStefan Haberland return -ENOMEM; 65125db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 65135db8440cSStefan Haberland dasd_get_device(device); 65145db8440cSStefan Haberland data->device = device; 65155db8440cSStefan Haberland data->lpum = lpum; 65165db8440cSStefan Haberland schedule_work(&data->worker); 65175db8440cSStefan Haberland return 0; 65185db8440cSStefan Haberland } 65195db8440cSStefan Haberland 6520a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6521a521b048SStefan Haberland { 6522a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6523a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6524a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6525a521b048SStefan Haberland dev_err(&device->cdev->dev, 6526a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6527a521b048SStefan Haberland lpum); 6528a521b048SStefan Haberland return 1; 6529a521b048SStefan Haberland } 6530a521b048SStefan Haberland return 0; 6531a521b048SStefan Haberland } 6532a521b048SStefan Haberland 6533a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6534a521b048SStefan Haberland { 6535a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6536a521b048SStefan Haberland 6537a521b048SStefan Haberland dev_err(&device->cdev->dev, 6538a521b048SStefan Haberland "High Performance FICON disabled\n"); 6539a521b048SStefan Haberland private->fcx_max_data = 0; 6540a521b048SStefan Haberland } 6541a521b048SStefan Haberland 6542a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6543a521b048SStefan Haberland { 6544a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6545a521b048SStefan Haberland 6546a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6547a521b048SStefan Haberland } 6548a521b048SStefan Haberland 6549a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6550a521b048SStefan Haberland struct irb *irb) 6551a521b048SStefan Haberland { 6552a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6553a521b048SStefan Haberland 6554a521b048SStefan Haberland if (!private->fcx_max_data) { 6555a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6556a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6557a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6558a521b048SStefan Haberland return; 6559a521b048SStefan Haberland } 6560a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6561a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6562a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6563a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6564a521b048SStefan Haberland return; 6565a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6566a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6567a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6568a521b048SStefan Haberland } 6569a521b048SStefan Haberland /* 6570a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6571a521b048SStefan Haberland * requeue of existing requests 6572a521b048SStefan Haberland */ 6573a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6574a521b048SStefan Haberland dasd_schedule_requeue(device); 6575a521b048SStefan Haberland } 6576a521b048SStefan Haberland 6577a0610a8aSJan Höppner /* 6578a0610a8aSJan Höppner * Initialize block layer request queue. 6579a0610a8aSJan Höppner */ 6580a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6581a0610a8aSJan Höppner { 6582a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6583a0610a8aSJan Höppner struct request_queue *q = block->request_queue; 6584a0610a8aSJan Höppner struct dasd_device *device = block->base; 6585a0610a8aSJan Höppner int max; 6586a0610a8aSJan Höppner 6587a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6588a0610a8aSJan Höppner /* 6589a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6590a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6591a0610a8aSJan Höppner * only need one ccw per track 6592a0610a8aSJan Höppner * so the max_hw_sectors are 6593a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6594a0610a8aSJan Höppner */ 6595a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6596a0610a8aSJan Höppner } else { 6597a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6598a0610a8aSJan Höppner } 6599a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6600a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6601a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6602a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6603a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6604a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6605a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6606a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6607a0610a8aSJan Höppner } 6608a0610a8aSJan Höppner 6609d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 66103bda058bSSebastian Ott .driver = { 6611d41dd122SStefan Haberland .name = "dasd-eckd", 6612d41dd122SStefan Haberland .owner = THIS_MODULE, 66131987c551SJulian Wiedmann .dev_groups = dasd_dev_groups, 66143bda058bSSebastian Ott }, 6615d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6616d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6617d41dd122SStefan Haberland .remove = dasd_generic_remove, 6618d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6619d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6620d41dd122SStefan Haberland .notify = dasd_generic_notify, 6621a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 66224679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6623a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6624420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6625d41dd122SStefan Haberland }; 6626f3eb5384SStefan Weinhuber 66271da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 66281da177e4SLinus Torvalds .owner = THIS_MODULE, 66291da177e4SLinus Torvalds .name = "ECKD", 66301da177e4SLinus Torvalds .ebcname = "ECKD", 66311da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 66328e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 66331da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6634b7294932SJan Höppner .pe_handler = dasd_eckd_pe_handler, 6635d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 66368e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6637daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6638a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 66391da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 66401da177e4SLinus Torvalds .start_IO = dasd_start_IO, 66411da177e4SLinus Torvalds .term_IO = dasd_term_IO, 66428e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 66431da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 66448fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 66451da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 66461da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 66475a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 66488e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 66498e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 66501da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6651fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 66521da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 66531107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6654501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 66552dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6656f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 66575db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 66585a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 66595a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6660a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6661a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6662a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6663a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6664c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6665c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6666c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6667c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 666891dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6669c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6670c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6671c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6672c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6673c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 66749e12e54cSJan Höppner .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 66755e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 66765e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 66771da177e4SLinus Torvalds }; 66781da177e4SLinus Torvalds 66791da177e4SLinus Torvalds static int __init 66801da177e4SLinus Torvalds dasd_eckd_init(void) 66811da177e4SLinus Torvalds { 6682736e6ea0SSebastian Ott int ret; 6683736e6ea0SSebastian Ott 66841da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6685f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6686f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6687f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6688f932bceaSStefan Weinhuber return -ENOMEM; 66899e12e54cSJan Höppner dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 66909e12e54cSJan Höppner GFP_KERNEL | GFP_DMA); 66919e12e54cSJan Höppner if (!dasd_vol_info_req) 66929e12e54cSJan Höppner return -ENOMEM; 6693b7294932SJan Höppner pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), 6694a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6695b7294932SJan Höppner if (!pe_handler_worker) { 6696a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 66979e12e54cSJan Höppner kfree(dasd_vol_info_req); 6698a4d26c6aSStefan Weinhuber return -ENOMEM; 6699a4d26c6aSStefan Weinhuber } 6700558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6701558b9ef0SStefan Weinhuber if (!rawpadpage) { 6702b7294932SJan Höppner kfree(pe_handler_worker); 6703558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 67049e12e54cSJan Höppner kfree(dasd_vol_info_req); 6705558b9ef0SStefan Weinhuber return -ENOMEM; 6706558b9ef0SStefan Weinhuber } 6707736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6708736e6ea0SSebastian Ott if (!ret) 6709736e6ea0SSebastian Ott wait_for_device_probe(); 6710a4d26c6aSStefan Weinhuber else { 6711b7294932SJan Höppner kfree(pe_handler_worker); 6712f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 67139e12e54cSJan Höppner kfree(dasd_vol_info_req); 6714558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6715a4d26c6aSStefan Weinhuber } 6716736e6ea0SSebastian Ott return ret; 67171da177e4SLinus Torvalds } 67181da177e4SLinus Torvalds 67191da177e4SLinus Torvalds static void __exit 67201da177e4SLinus Torvalds dasd_eckd_cleanup(void) 67211da177e4SLinus Torvalds { 67221da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6723b7294932SJan Höppner kfree(pe_handler_worker); 6724f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6725558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 67261da177e4SLinus Torvalds } 67271da177e4SLinus Torvalds 67281da177e4SLinus Torvalds module_init(dasd_eckd_init); 67291da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6730