16a55d2cdSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 51da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 61da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 71da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 8d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 9ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 13ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 14fc19f381SStefan Haberland 151da177e4SLinus Torvalds #include <linux/stddef.h> 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 191da177e4SLinus Torvalds #include <linux/bio.h> 201da177e4SLinus Torvalds #include <linux/module.h> 21048cd4e5SHeiko Carstens #include <linux/compat.h> 221da177e4SLinus Torvalds #include <linux/init.h> 235a3b7b11SStefan Haberland #include <linux/seq_file.h> 241da177e4SLinus Torvalds 25382b7366SSebastian Ott #include <asm/css_chars.h> 261da177e4SLinus Torvalds #include <asm/debug.h> 271da177e4SLinus Torvalds #include <asm/idals.h> 281da177e4SLinus Torvalds #include <asm/ebcdic.h> 291da177e4SLinus Torvalds #include <asm/io.h> 307c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 3140545573SHorst Hummel #include <asm/cio.h> 321da177e4SLinus Torvalds #include <asm/ccwdev.h> 33f3eb5384SStefan Weinhuber #include <asm/itcw.h> 345db8440cSStefan Haberland #include <asm/schid.h> 355db8440cSStefan Haberland #include <asm/chpid.h> 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include "dasd_int.h" 381da177e4SLinus Torvalds #include "dasd_eckd.h" 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #ifdef PRINTK_HEADER 411da177e4SLinus Torvalds #undef PRINTK_HEADER 421da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 431da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 441da177e4SLinus Torvalds 45e4dbb0f2SStefan Haberland /* 46e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 47e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 48e4dbb0f2SStefan Haberland */ 49e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 50e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 51e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 52e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 53e4dbb0f2SStefan Haberland 541da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 591da177e4SLinus Torvalds * dasd_eckd_probe */ 601da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 61d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 62d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 635da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 64d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 65d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 66d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 67d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 68d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 69d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 70d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 711da177e4SLinus Torvalds { /* end of list */ }, 721da177e4SLinus Torvalds }; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 771da177e4SLinus Torvalds 78558b9ef0SStefan Weinhuber static void *rawpadpage; 79558b9ef0SStefan Weinhuber 80eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 81eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 82eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 83eb6e199bSStefan Weinhuber 84f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 85f932bceaSStefan Weinhuber static struct { 86f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 87f932bceaSStefan Weinhuber struct ccw1 ccw; 88f932bceaSStefan Weinhuber char data[32]; 89f932bceaSStefan Weinhuber } *dasd_reserve_req; 90f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 91f932bceaSStefan Weinhuber 929e12e54cSJan Höppner static struct { 939e12e54cSJan Höppner struct dasd_ccw_req cqr; 949e12e54cSJan Höppner struct ccw1 ccw[2]; 959e12e54cSJan Höppner char data[40]; 969e12e54cSJan Höppner } *dasd_vol_info_req; 979e12e54cSJan Höppner static DEFINE_MUTEX(dasd_vol_info_mutex); 989e12e54cSJan Höppner 999e12e54cSJan Höppner struct ext_pool_exhaust_work_data { 1009e12e54cSJan Höppner struct work_struct worker; 1019e12e54cSJan Höppner struct dasd_device *device; 1029e12e54cSJan Höppner struct dasd_device *base; 1039e12e54cSJan Höppner }; 1049e12e54cSJan Höppner 105a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 106b7294932SJan Höppner struct pe_handler_work_data { 107a4d26c6aSStefan Weinhuber struct work_struct worker; 108a4d26c6aSStefan Weinhuber struct dasd_device *device; 109a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 110a4d26c6aSStefan Weinhuber struct ccw1 ccw; 111a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112a4d26c6aSStefan Weinhuber int isglobal; 113a4d26c6aSStefan Weinhuber __u8 tbvpm; 1144d063e64SJan Höppner __u8 fcsecpm; 115a4d26c6aSStefan Weinhuber }; 116b7294932SJan Höppner static struct pe_handler_work_data *pe_handler_worker; 117b7294932SJan Höppner static DEFINE_MUTEX(dasd_pe_handler_mutex); 118eb6e199bSStefan Weinhuber 1195db8440cSStefan Haberland struct check_attention_work_data { 1205db8440cSStefan Haberland struct work_struct worker; 1215db8440cSStefan Haberland struct dasd_device *device; 1225db8440cSStefan Haberland __u8 lpum; 1235db8440cSStefan Haberland }; 1245db8440cSStefan Haberland 125c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *); 1268fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1278fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1288fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1298fd57520SJan Höppner unsigned int, unsigned int); 1308fd57520SJan Höppner 1311da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1321da177e4SLinus Torvalds * the other detection code is gone */ 1331da177e4SLinus Torvalds static int 1341da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds int ret; 1371da177e4SLinus Torvalds 13840545573SHorst Hummel /* set ECKD specific ccw-device options */ 139454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 140454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 14140545573SHorst Hummel if (ret) { 142b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 143b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 144b8ed5dd5SStefan Haberland "ccw-device options"); 1451da177e4SLinus Torvalds return ret; 14640545573SHorst Hummel } 147e03c5941SJan Höppner ret = dasd_generic_probe(cdev); 14840545573SHorst Hummel return ret; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds static int 1521da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1531da177e4SLinus Torvalds { 1541da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1551da177e4SLinus Torvalds } 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1581da177e4SLinus Torvalds #define LABEL_SIZE 140 1591da177e4SLinus Torvalds 1603bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 161ce6915f5SJan Höppner static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 1623bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1633bc9fef9SStefan Haberland 1641da177e4SLinus Torvalds static inline unsigned int 1651da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1661da177e4SLinus Torvalds { 1671da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1704d284cacSHeiko Carstens static unsigned int 1711da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1721da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds int dn, kn; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds switch (rdc->dev_type) { 1771da177e4SLinus Torvalds case 0x3380: 1781da177e4SLinus Torvalds if (kl) 1791da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1801da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1811da177e4SLinus Torvalds else 1821da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1831da177e4SLinus Torvalds case 0x3390: 1841da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1851da177e4SLinus Torvalds if (kl) { 1861da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1871da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1881da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1891da177e4SLinus Torvalds } else 1901da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1911da177e4SLinus Torvalds case 0x9345: 1921da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1931da177e4SLinus Torvalds if (kl) { 1941da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1951da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1961da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1971da177e4SLinus Torvalds } else 1981da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds return 0; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 203b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 204b44b0ab3SStefan Weinhuber { 205b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 206b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 207b44b0ab3SStefan Weinhuber geo->head <<= 4; 208b44b0ab3SStefan Weinhuber geo->head |= head; 209b44b0ab3SStefan Weinhuber } 210b44b0ab3SStefan Weinhuber 2115e6bdd37SStefan Haberland /* 2125e6bdd37SStefan Haberland * calculate failing track from sense data depending if 2135e6bdd37SStefan Haberland * it is an EAV device or not 2145e6bdd37SStefan Haberland */ 2155e6bdd37SStefan Haberland static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, 2165e6bdd37SStefan Haberland sector_t *track) 2175e6bdd37SStefan Haberland { 2185e6bdd37SStefan Haberland struct dasd_eckd_private *private = device->private; 2195e6bdd37SStefan Haberland u8 *sense = NULL; 2205e6bdd37SStefan Haberland u32 cyl; 2215e6bdd37SStefan Haberland u8 head; 2225e6bdd37SStefan Haberland 2235e6bdd37SStefan Haberland sense = dasd_get_sense(irb); 2245e6bdd37SStefan Haberland if (!sense) { 2255e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2265e6bdd37SStefan Haberland "ESE error no sense data\n"); 2275e6bdd37SStefan Haberland return -EINVAL; 2285e6bdd37SStefan Haberland } 2295e6bdd37SStefan Haberland if (!(sense[27] & DASD_SENSE_BIT_2)) { 2305e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2315e6bdd37SStefan Haberland "ESE error no valid track data\n"); 2325e6bdd37SStefan Haberland return -EINVAL; 2335e6bdd37SStefan Haberland } 2345e6bdd37SStefan Haberland 2355e6bdd37SStefan Haberland if (sense[27] & DASD_SENSE_BIT_3) { 2365e6bdd37SStefan Haberland /* enhanced addressing */ 2375e6bdd37SStefan Haberland cyl = sense[30] << 20; 2385e6bdd37SStefan Haberland cyl |= (sense[31] & 0xF0) << 12; 2395e6bdd37SStefan Haberland cyl |= sense[28] << 8; 2405e6bdd37SStefan Haberland cyl |= sense[29]; 2415e6bdd37SStefan Haberland } else { 2425e6bdd37SStefan Haberland cyl = sense[29] << 8; 2435e6bdd37SStefan Haberland cyl |= sense[30]; 2445e6bdd37SStefan Haberland } 2455e6bdd37SStefan Haberland head = sense[31] & 0x0F; 2465e6bdd37SStefan Haberland *track = cyl * private->rdc_data.trk_per_cyl + head; 2475e6bdd37SStefan Haberland return 0; 2485e6bdd37SStefan Haberland } 2495e6bdd37SStefan Haberland 2505628683cSStefan Haberland static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 2511da177e4SLinus Torvalds struct dasd_device *device) 2521da177e4SLinus Torvalds { 253543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 254d54853efSMartin Schwidefsky int rc; 2551da177e4SLinus Torvalds 2565628683cSStefan Haberland rc = get_phys_clock(&data->ep_sys_time); 2575628683cSStefan Haberland /* 2585628683cSStefan Haberland * Ignore return code if XRC is not supported or 2595628683cSStefan Haberland * sync clock is switched off 2605628683cSStefan Haberland */ 2615628683cSStefan Haberland if ((rc && !private->rdc_data.facilities.XRC_supported) || 2625628683cSStefan Haberland rc == -EOPNOTSUPP || rc == -EACCES) 263d54853efSMartin Schwidefsky return 0; 2641da177e4SLinus Torvalds 2651da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2661da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2671da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2681da177e4SLinus Torvalds 26945f186beSJan Höppner if (ccw) { 27045f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 27145f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 27245f186beSJan Höppner } 27345f186beSJan Höppner 274d54853efSMartin Schwidefsky return rc; 2751da177e4SLinus Torvalds } 2761da177e4SLinus Torvalds 2774d284cacSHeiko Carstens static int 278b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 27945f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 28045f186beSJan Höppner int blksize) 2811da177e4SLinus Torvalds { 282543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 283b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 28445f186beSJan Höppner u32 begcyl, endcyl; 285d54853efSMartin Schwidefsky int rc = 0; 2861da177e4SLinus Torvalds 28745f186beSJan Höppner if (ccw) { 2881da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2891da177e4SLinus Torvalds ccw->flags = 0; 2901da177e4SLinus Torvalds ccw->count = 16; 2911da177e4SLinus Torvalds ccw->cda = (__u32)__pa(data); 29245f186beSJan Höppner } 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2951da177e4SLinus Torvalds switch (cmd) { 2961da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2971da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2981da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2991da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 3001da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 3011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 3021da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 3031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 3041da177e4SLinus Torvalds data->mask.perm = 0x1; 3051da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 3061da177e4SLinus Torvalds break; 3078fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 3088fd57520SJan Höppner data->mask.perm = 0x1; 3098fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 3108fd57520SJan Höppner break; 31145f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 31245f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 31345f186beSJan Höppner data->mask.perm = 0x1; 31445f186beSJan Höppner data->attributes.operation = private->attrib.operation; 31545f186beSJan Höppner data->blk_size = 0; 31645f186beSJan Höppner break; 3171da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 3181da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 3191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 3201da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 3211da177e4SLinus Torvalds data->mask.perm = 0x02; 3221da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 3235628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3241da177e4SLinus Torvalds break; 3251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 3261da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 3271da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3285628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3291da177e4SLinus Torvalds break; 3301da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 3311da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3321da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3331da177e4SLinus Torvalds data->mask.perm = 0x3; 3341da177e4SLinus Torvalds data->mask.auth = 0x1; 3351da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3365628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3371da177e4SLinus Torvalds break; 33845f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 33945f186beSJan Höppner data->mask.perm = 0x03; 34045f186beSJan Höppner data->attributes.operation = private->attrib.operation; 34145f186beSJan Höppner data->blk_size = 0; 34245f186beSJan Höppner break; 34345f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 34445f186beSJan Höppner data->mask.perm = 0x02; 34545f186beSJan Höppner data->attributes.operation = private->attrib.operation; 34645f186beSJan Höppner data->blk_size = blksize; 3475628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 34845f186beSJan Höppner break; 3491da177e4SLinus Torvalds default: 350fc19f381SStefan Haberland dev_err(&device->cdev->dev, 351fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 3521da177e4SLinus Torvalds break; 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3581da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3591da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3601da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3611da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3621da177e4SLinus Torvalds 363b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 364b44b0ab3SStefan Weinhuber begcyl = trk / heads; 365b44b0ab3SStefan Weinhuber beghead = trk % heads; 366b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 367b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3701da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3711da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3721da177e4SLinus Torvalds 373b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 374b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3751da177e4SLinus Torvalds else 376b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds 379b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 380b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 381d54853efSMartin Schwidefsky return rc; 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds 3848e09f215SStefan Weinhuber 38545f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 38645f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 38745f186beSJan Höppner int count, int cmd, struct dasd_device *device, 38845f186beSJan Höppner unsigned int reclen, unsigned int tlf) 389f3eb5384SStefan Weinhuber { 390543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 391f3eb5384SStefan Weinhuber int sector; 392f3eb5384SStefan Weinhuber int dn, d; 393f3eb5384SStefan Weinhuber 39445f186beSJan Höppner if (ccw) { 39545f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 39645f186beSJan Höppner ccw->flags = 0; 39745f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 39845f186beSJan Höppner ccw->count = 22; 39945f186beSJan Höppner else 40045f186beSJan Höppner ccw->count = 20; 40145f186beSJan Höppner ccw->cda = (__u32)__pa(data); 40245f186beSJan Höppner } 40345f186beSJan Höppner 404f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 405f3eb5384SStefan Weinhuber sector = 0; 406f3eb5384SStefan Weinhuber if (rec_on_trk) { 407f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 408f3eb5384SStefan Weinhuber case 0x3390: 409f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 410f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 411f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 412f3eb5384SStefan Weinhuber break; 413f3eb5384SStefan Weinhuber case 0x3380: 414f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 415f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 416f3eb5384SStefan Weinhuber break; 417f3eb5384SStefan Weinhuber } 418f3eb5384SStefan Weinhuber } 419f3eb5384SStefan Weinhuber data->sector = sector; 420f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 421f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 422f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 423f3eb5384SStefan Weinhuber */ 424f3eb5384SStefan Weinhuber data->count = count; 425f3eb5384SStefan Weinhuber switch (cmd) { 426f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 427f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 428f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 429f3eb5384SStefan Weinhuber break; 430f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 431f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 432f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 433f3eb5384SStefan Weinhuber break; 434f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 435f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 436f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 437f3eb5384SStefan Weinhuber data->count++; 438f3eb5384SStefan Weinhuber break; 439f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 440f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 441f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 442f3eb5384SStefan Weinhuber data->count++; 443f3eb5384SStefan Weinhuber break; 444f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 445f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 446f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 447f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 448f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 449f3eb5384SStefan Weinhuber data->length = reclen; 450f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 451f3eb5384SStefan Weinhuber break; 452f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 453f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 454f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 455f3eb5384SStefan Weinhuber data->length = reclen; 456f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 457f3eb5384SStefan Weinhuber break; 458e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 459e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 460e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 461e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 462e4dbb0f2SStefan Haberland data->length = 0; 463e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 464e4dbb0f2SStefan Haberland if (data->count > 8) { 465e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 466e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 467e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 468e4dbb0f2SStefan Haberland } else { 469e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 470e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 471e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 472e4dbb0f2SStefan Haberland } 473e4dbb0f2SStefan Haberland data->sector = 0xFF; 474e4dbb0f2SStefan Haberland break; 475f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 476f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 477f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 478f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 479f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 480f3eb5384SStefan Weinhuber break; 481f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 482f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 483f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 484f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 485f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 486f3eb5384SStefan Weinhuber data->length = reclen; 487f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 488f3eb5384SStefan Weinhuber break; 489f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 490f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 491f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 492f3eb5384SStefan Weinhuber data->length = reclen; 493f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 494f3eb5384SStefan Weinhuber break; 495f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 496f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 497f3eb5384SStefan Weinhuber break; 498e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 499e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 500e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 501e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 502e4dbb0f2SStefan Haberland data->sector = 0xFF; 503e4dbb0f2SStefan Haberland break; 504f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 505f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 506f3eb5384SStefan Weinhuber data->length = tlf; 507f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 508f3eb5384SStefan Weinhuber break; 509f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 510f3eb5384SStefan Weinhuber data->length = reclen; 511f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 512f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 513f3eb5384SStefan Weinhuber break; 514f3eb5384SStefan Weinhuber default: 515f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 516f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 517f3eb5384SStefan Weinhuber BUG(); 518f3eb5384SStefan Weinhuber } 519f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 520f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 521f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 522f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 523f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 524f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 525f3eb5384SStefan Weinhuber } 526f3eb5384SStefan Weinhuber 527f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 528b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 529f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 53045f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 531f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 5328e09f215SStefan Weinhuber { 5338e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 534f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 53545f186beSJan Höppner struct DE_eckd_data *dedata; 5368e09f215SStefan Weinhuber int rc = 0; 5378e09f215SStefan Weinhuber 538543691a4SSebastian Ott basepriv = basedev->private; 539543691a4SSebastian Ott startpriv = startdev->private; 540f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 541f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 5428e09f215SStefan Weinhuber 5438e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5448e09f215SStefan Weinhuber ccw->flags = 0; 545e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 546e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 547e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 548e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 549e4dbb0f2SStefan Haberland } else { 5508e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5518e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5528e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 553e4dbb0f2SStefan Haberland } 554e4dbb0f2SStefan Haberland 5558e09f215SStefan Weinhuber /* prefix data */ 556f3eb5384SStefan Weinhuber if (format > 1) { 557f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 558f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 559f3eb5384SStefan Weinhuber BUG(); 560f3eb5384SStefan Weinhuber return -EINVAL; 561f3eb5384SStefan Weinhuber } 562f3eb5384SStefan Weinhuber pfxdata->format = format; 563542e30ceSStefan Haberland pfxdata->base_address = basepriv->conf.ned->unit_addr; 564542e30ceSStefan Haberland pfxdata->base_lss = basepriv->conf.ned->ID; 565f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5668e09f215SStefan Weinhuber 5678e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 568da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 5698e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 570da340f92SStefan Haberland 571da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 572da340f92SStefan Haberland pfxdata->validity.verify_base = 1; 5738e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5748e09f215SStefan Weinhuber } 5758e09f215SStefan Weinhuber 57645f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5778e09f215SStefan Weinhuber 57845f186beSJan Höppner /* 57945f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 58045f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 58145f186beSJan Höppner * reflected in the prefix data as well. 58245f186beSJan Höppner */ 58345f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 58445f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 585f3eb5384SStefan Weinhuber 586f3eb5384SStefan Weinhuber if (format == 1) { 58745f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 588f3eb5384SStefan Weinhuber basedev, blksize, tlf); 589f3eb5384SStefan Weinhuber } 590f3eb5384SStefan Weinhuber 5918e09f215SStefan Weinhuber return rc; 5928e09f215SStefan Weinhuber } 5938e09f215SStefan Weinhuber 594f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 595f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 596f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 597f3eb5384SStefan Weinhuber { 598f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 599f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 600f3eb5384SStefan Weinhuber } 601f3eb5384SStefan Weinhuber 6024d284cacSHeiko Carstens static void 603b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 604b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6051da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6061da177e4SLinus Torvalds { 607543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 6081da177e4SLinus Torvalds int sector; 6091da177e4SLinus Torvalds int dn, d; 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6121da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6131da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6161da177e4SLinus Torvalds ccw->flags = 0; 6171da177e4SLinus Torvalds ccw->count = 16; 6181da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6211da177e4SLinus Torvalds sector = 0; 6221da177e4SLinus Torvalds if (rec_on_trk) { 6231da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6241da177e4SLinus Torvalds case 0x3390: 6251da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6261da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6271da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6281da177e4SLinus Torvalds break; 6291da177e4SLinus Torvalds case 0x3380: 6301da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6311da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6321da177e4SLinus Torvalds break; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds } 6351da177e4SLinus Torvalds data->sector = sector; 6361da177e4SLinus Torvalds data->count = no_rec; 6371da177e4SLinus Torvalds switch (cmd) { 6381da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6391da177e4SLinus Torvalds data->operation.orientation = 0x3; 6401da177e4SLinus Torvalds data->operation.operation = 0x03; 6411da177e4SLinus Torvalds break; 6421da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6431da177e4SLinus Torvalds data->operation.orientation = 0x3; 6441da177e4SLinus Torvalds data->operation.operation = 0x16; 6451da177e4SLinus Torvalds break; 6461da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6471da177e4SLinus Torvalds data->operation.orientation = 0x1; 6481da177e4SLinus Torvalds data->operation.operation = 0x03; 6491da177e4SLinus Torvalds data->count++; 6501da177e4SLinus Torvalds break; 6511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6521da177e4SLinus Torvalds data->operation.orientation = 0x3; 6531da177e4SLinus Torvalds data->operation.operation = 0x16; 6541da177e4SLinus Torvalds data->count++; 6551da177e4SLinus Torvalds break; 6561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6601da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6611da177e4SLinus Torvalds data->length = reclen; 6621da177e4SLinus Torvalds data->operation.operation = 0x01; 6631da177e4SLinus Torvalds break; 6641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6661da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6671da177e4SLinus Torvalds data->length = reclen; 6681da177e4SLinus Torvalds data->operation.operation = 0x03; 6691da177e4SLinus Torvalds break; 6701da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6711da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6721da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6731da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6741da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6751da177e4SLinus Torvalds data->length = reclen; 6761da177e4SLinus Torvalds data->operation.operation = 0x06; 6771da177e4SLinus Torvalds break; 6781da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6791da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6801da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6811da177e4SLinus Torvalds data->length = reclen; 6821da177e4SLinus Torvalds data->operation.operation = 0x16; 6831da177e4SLinus Torvalds break; 6841da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6851da177e4SLinus Torvalds data->operation.operation = 0x06; 6861da177e4SLinus Torvalds break; 6871da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6881da177e4SLinus Torvalds data->length = reclen; 6891da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6901da177e4SLinus Torvalds data->operation.operation = 0x0b; 6911da177e4SLinus Torvalds break; 6921da177e4SLinus Torvalds default: 693fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 694fc19f381SStefan Haberland "opcode 0x%x", cmd); 6951da177e4SLinus Torvalds } 696b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 697b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 698b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 699b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 700b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7011da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds /* 7051da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7061da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7071da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7081da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7091da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7101da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7111da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7121da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7131da177e4SLinus Torvalds */ 7141da177e4SLinus Torvalds static inline int 7151da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds if (recid < 3) 7181da177e4SLinus Torvalds return 1; 7191da177e4SLinus Torvalds if (recid < blk_per_trk) 7201da177e4SLinus Torvalds return 0; 7211da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7221da177e4SLinus Torvalds return 1; 7231da177e4SLinus Torvalds return 0; 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds /* 7271da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7281da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7291da177e4SLinus Torvalds * for the recid. 7301da177e4SLinus Torvalds */ 7311da177e4SLinus Torvalds static inline int 7321da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7331da177e4SLinus Torvalds { 7341da177e4SLinus Torvalds if (recid < 3) 7351da177e4SLinus Torvalds return sizes_trk0[recid]; 7361da177e4SLinus Torvalds return LABEL_SIZE; 7371da177e4SLinus Torvalds } 738b206181dSStefan Haberland /* create unique id from private structure. */ 739542e30ceSStefan Haberland static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid) 7403d052595SHorst Hummel { 7414abb08c2SStefan Weinhuber int count; 7423d052595SHorst Hummel 7433d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 744542e30ceSStefan Haberland memcpy(uid->vendor, conf->ned->HDA_manufacturer, 7453d052595SHorst Hummel sizeof(uid->vendor) - 1); 7463d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 747542e30ceSStefan Haberland memcpy(uid->serial, &conf->ned->serial, 7483d052595SHorst Hummel sizeof(uid->serial) - 1); 7493d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 750542e30ceSStefan Haberland uid->ssid = conf->gneq->subsystemID; 751542e30ceSStefan Haberland uid->real_unit_addr = conf->ned->unit_addr; 752542e30ceSStefan Haberland if (conf->sneq) { 753542e30ceSStefan Haberland uid->type = conf->sneq->sua_flags; 7548e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 755542e30ceSStefan Haberland uid->base_unit_addr = conf->sneq->base_unit_addr; 7568e09f215SStefan Weinhuber } else { 7578e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7588e09f215SStefan Weinhuber } 759542e30ceSStefan Haberland if (conf->vdsneq) { 7604abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7614abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 762542e30ceSStefan Haberland conf->vdsneq->uit[count]); 7634abb08c2SStefan Weinhuber } 7644abb08c2SStefan Weinhuber } 765b206181dSStefan Haberland } 766b206181dSStefan Haberland 767b206181dSStefan Haberland /* 768b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 769b206181dSStefan Haberland */ 770b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 771b206181dSStefan Haberland { 772543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 773b206181dSStefan Haberland unsigned long flags; 774b206181dSStefan Haberland 775b206181dSStefan Haberland if (!private) 776b206181dSStefan Haberland return -ENODEV; 777542e30ceSStefan Haberland if (!private->conf.ned || !private->conf.gneq) 778b206181dSStefan Haberland return -ENODEV; 779b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 780542e30ceSStefan Haberland create_uid(&private->conf, &private->uid); 7812dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7823d052595SHorst Hummel return 0; 7833d052595SHorst Hummel } 7843d052595SHorst Hummel 7852dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7862dedf0d9SStefan Haberland { 787543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7882dedf0d9SStefan Haberland unsigned long flags; 7892dedf0d9SStefan Haberland 790543691a4SSebastian Ott if (private) { 7912dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7922dedf0d9SStefan Haberland *uid = private->uid; 7932dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7942dedf0d9SStefan Haberland return 0; 7952dedf0d9SStefan Haberland } 7962dedf0d9SStefan Haberland return -EINVAL; 7972dedf0d9SStefan Haberland } 7982dedf0d9SStefan Haberland 799b206181dSStefan Haberland /* 800b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 801b206181dSStefan Haberland * return 0 for match 802b206181dSStefan Haberland */ 803b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 804542e30ceSStefan Haberland struct dasd_conf *path_conf) 805b206181dSStefan Haberland { 806b206181dSStefan Haberland struct dasd_uid device_uid; 807542e30ceSStefan Haberland struct dasd_uid path_uid; 808b206181dSStefan Haberland 809542e30ceSStefan Haberland create_uid(path_conf, &path_uid); 810b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 811b206181dSStefan Haberland 812542e30ceSStefan Haberland return memcmp(&device_uid, &path_uid, sizeof(struct dasd_uid)); 813b206181dSStefan Haberland } 814b206181dSStefan Haberland 815a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 816a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 817a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 818a4d26c6aSStefan Weinhuber __u8 lpm) 81917283b56SCornelia Huck { 82017283b56SCornelia Huck struct ccw1 *ccw; 821a4d26c6aSStefan Weinhuber /* 822a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 823a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 824a4d26c6aSStefan Weinhuber */ 825a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 826a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 827a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 828a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 82917283b56SCornelia Huck 83017283b56SCornelia Huck ccw = cqr->cpaddr; 831a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 832a4d26c6aSStefan Weinhuber ccw->flags = 0; 83317283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 834a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 835a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 83617283b56SCornelia Huck 8378e09f215SStefan Weinhuber cqr->startdev = device; 8388e09f215SStefan Weinhuber cqr->memdev = device; 8398e09f215SStefan Weinhuber cqr->block = NULL; 84017283b56SCornelia Huck cqr->expires = 10*HZ; 84117283b56SCornelia Huck cqr->lpm = lpm; 842eb6e199bSStefan Weinhuber cqr->retries = 256; 8431aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 84417283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 845a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 846a4d26c6aSStefan Weinhuber } 847a4d26c6aSStefan Weinhuber 8485915a873SStefan Haberland /* 8495915a873SStefan Haberland * Wakeup helper for read_conf 8505915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8515915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8525915a873SStefan Haberland * to show support for virtual device SNEQ 8535915a873SStefan Haberland */ 8545915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8555915a873SStefan Haberland { 8565915a873SStefan Haberland struct ccw1 *ccw; 8575915a873SStefan Haberland __u8 *rcd_buffer; 8585915a873SStefan Haberland 8595915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8605915a873SStefan Haberland ccw = cqr->cpaddr; 8615915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8625915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8635915a873SStefan Haberland 8645915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8655915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8665915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8675915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8685915a873SStefan Haberland } 8695915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8705915a873SStefan Haberland } 8715915a873SStefan Haberland 872a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 873a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 874a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 875a4d26c6aSStefan Weinhuber __u8 lpm) 876a4d26c6aSStefan Weinhuber { 877a4d26c6aSStefan Weinhuber struct ciw *ciw; 878a4d26c6aSStefan Weinhuber int rc; 879a4d26c6aSStefan Weinhuber /* 880a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 881a4d26c6aSStefan Weinhuber * some devices do not support RCD 882a4d26c6aSStefan Weinhuber */ 883a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 884a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 885a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 886a4d26c6aSStefan Weinhuber 887a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 888a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8895a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 890a4d26c6aSStefan Weinhuber cqr->retries = 5; 8915915a873SStefan Haberland cqr->callback = read_conf_cb; 892a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 893a4d26c6aSStefan Weinhuber return rc; 89417283b56SCornelia Huck } 89517283b56SCornelia Huck 89617283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 89717283b56SCornelia Huck void **rcd_buffer, 89817283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 89917283b56SCornelia Huck { 90017283b56SCornelia Huck struct ciw *ciw; 90117283b56SCornelia Huck char *rcd_buf = NULL; 90217283b56SCornelia Huck int ret; 90317283b56SCornelia Huck struct dasd_ccw_req *cqr; 90417283b56SCornelia Huck 90517283b56SCornelia Huck /* 906a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 907a4d26c6aSStefan Weinhuber * some devices do not support RCD 90817283b56SCornelia Huck */ 90917283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 910a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 91117283b56SCornelia Huck ret = -EOPNOTSUPP; 91217283b56SCornelia Huck goto out_error; 91317283b56SCornelia Huck } 914a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 91517283b56SCornelia Huck if (!rcd_buf) { 91617283b56SCornelia Huck ret = -ENOMEM; 91717283b56SCornelia Huck goto out_error; 91817283b56SCornelia Huck } 919a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 920a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 921c5205f2fSSebastian Ott device, NULL); 92217283b56SCornelia Huck if (IS_ERR(cqr)) { 923a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 924a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 925a4d26c6aSStefan Weinhuber ret = -ENOMEM; 92617283b56SCornelia Huck goto out_error; 92717283b56SCornelia Huck } 928a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9295915a873SStefan Haberland cqr->callback = read_conf_cb; 93017283b56SCornelia Huck ret = dasd_sleep_on(cqr); 93117283b56SCornelia Huck /* 93217283b56SCornelia Huck * on success we update the user input parms 93317283b56SCornelia Huck */ 9348e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 93517283b56SCornelia Huck if (ret) 93617283b56SCornelia Huck goto out_error; 93717283b56SCornelia Huck 938a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 93917283b56SCornelia Huck *rcd_buffer = rcd_buf; 94017283b56SCornelia Huck return 0; 94117283b56SCornelia Huck out_error: 94217283b56SCornelia Huck kfree(rcd_buf); 94317283b56SCornelia Huck *rcd_buffer = NULL; 94417283b56SCornelia Huck *rcd_buffer_size = 0; 94517283b56SCornelia Huck return ret; 94617283b56SCornelia Huck } 94717283b56SCornelia Huck 948542e30ceSStefan Haberland static int dasd_eckd_identify_conf_parts(struct dasd_conf *conf) 9494abb08c2SStefan Weinhuber { 9504abb08c2SStefan Weinhuber 9514abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9524abb08c2SStefan Weinhuber int i, count; 9534abb08c2SStefan Weinhuber 954542e30ceSStefan Haberland conf->ned = NULL; 955542e30ceSStefan Haberland conf->sneq = NULL; 956542e30ceSStefan Haberland conf->vdsneq = NULL; 957542e30ceSStefan Haberland conf->gneq = NULL; 958542e30ceSStefan Haberland count = conf->len / sizeof(struct dasd_sneq); 959542e30ceSStefan Haberland sneq = (struct dasd_sneq *)conf->data; 9604abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9614abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 962542e30ceSStefan Haberland conf->sneq = sneq; 9634abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 964542e30ceSStefan Haberland conf->vdsneq = (struct vd_sneq *)sneq; 9654abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 966542e30ceSStefan Haberland conf->gneq = (struct dasd_gneq *)sneq; 9674abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 968542e30ceSStefan Haberland conf->ned = (struct dasd_ned *)sneq; 9694abb08c2SStefan Weinhuber sneq++; 9704abb08c2SStefan Weinhuber } 971542e30ceSStefan Haberland if (!conf->ned || !conf->gneq) { 972542e30ceSStefan Haberland conf->ned = NULL; 973542e30ceSStefan Haberland conf->sneq = NULL; 974542e30ceSStefan Haberland conf->vdsneq = NULL; 975542e30ceSStefan Haberland conf->gneq = NULL; 9764abb08c2SStefan Weinhuber return -EINVAL; 9774abb08c2SStefan Weinhuber } 9784abb08c2SStefan Weinhuber return 0; 9794abb08c2SStefan Weinhuber 9804abb08c2SStefan Weinhuber }; 9814abb08c2SStefan Weinhuber 9824abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9834abb08c2SStefan Weinhuber { 9844abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9854abb08c2SStefan Weinhuber int i, count, found; 9864abb08c2SStefan Weinhuber 9874abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9884abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9894abb08c2SStefan Weinhuber found = 0; 9904abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9914abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9924abb08c2SStefan Weinhuber found = 1; 9934abb08c2SStefan Weinhuber break; 9944abb08c2SStefan Weinhuber } 9954abb08c2SStefan Weinhuber gneq++; 9964abb08c2SStefan Weinhuber } 9974abb08c2SStefan Weinhuber if (found) 9984abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9994abb08c2SStefan Weinhuber else 10004abb08c2SStefan Weinhuber return 0; 10014abb08c2SStefan Weinhuber } 10024abb08c2SStefan Weinhuber 1003d2a52758SJan Höppner static void dasd_eckd_store_conf_data(struct dasd_device *device, 1004d2a52758SJan Höppner struct dasd_conf_data *conf_data, int chp) 1005d2a52758SJan Höppner { 1006952835edSStefan Haberland struct dasd_eckd_private *private = device->private; 1007d2a52758SJan Höppner struct channel_path_desc_fmt0 *chp_desc; 1008d2a52758SJan Höppner struct subchannel_id sch_id; 1009952835edSStefan Haberland void *cdp; 1010d2a52758SJan Höppner 101146018121SJan Höppner /* 101246018121SJan Höppner * path handling and read_conf allocate data 101346018121SJan Höppner * free it before replacing the pointer 1014952835edSStefan Haberland * also replace the old private->conf_data pointer 1015952835edSStefan Haberland * with the new one if this points to the same data 101646018121SJan Höppner */ 1017952835edSStefan Haberland cdp = device->path[chp].conf_data; 1018542e30ceSStefan Haberland if (private->conf.data == cdp) { 1019542e30ceSStefan Haberland private->conf.data = (void *)conf_data; 1020542e30ceSStefan Haberland dasd_eckd_identify_conf_parts(&private->conf); 1021952835edSStefan Haberland } 1022952835edSStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 1023d2a52758SJan Höppner device->path[chp].conf_data = conf_data; 1024d2a52758SJan Höppner device->path[chp].cssid = sch_id.cssid; 1025d2a52758SJan Höppner device->path[chp].ssid = sch_id.ssid; 1026d2a52758SJan Höppner chp_desc = ccw_device_get_chp_desc(device->cdev, chp); 1027d2a52758SJan Höppner if (chp_desc) 1028d2a52758SJan Höppner device->path[chp].chpid = chp_desc->chpid; 1029d2a52758SJan Höppner kfree(chp_desc); 1030952835edSStefan Haberland kfree(cdp); 1031d2a52758SJan Höppner } 1032d2a52758SJan Höppner 1033c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1034c7c0c9deSStefan Haberland { 1035543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1036c7c0c9deSStefan Haberland int i; 1037c7c0c9deSStefan Haberland 1038542e30ceSStefan Haberland private->conf.data = NULL; 1039542e30ceSStefan Haberland private->conf.len = 0; 1040c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1041c9346151SStefan Haberland kfree(device->path[i].conf_data); 1042c9346151SStefan Haberland device->path[i].conf_data = NULL; 1043a521b048SStefan Haberland device->path[i].cssid = 0; 1044a521b048SStefan Haberland device->path[i].ssid = 0; 1045a521b048SStefan Haberland device->path[i].chpid = 0; 10469e34c8baSJan Höppner dasd_path_notoper(device, i); 1047c7c0c9deSStefan Haberland } 1048c7c0c9deSStefan Haberland } 1049c7c0c9deSStefan Haberland 105019508b20SJan Höppner static void dasd_eckd_read_fc_security(struct dasd_device *device) 105119508b20SJan Höppner { 105219508b20SJan Höppner struct dasd_eckd_private *private = device->private; 105319508b20SJan Höppner u8 esm_valid; 105419508b20SJan Höppner u8 esm[8]; 105519508b20SJan Höppner int chp; 105619508b20SJan Höppner int rc; 105719508b20SJan Höppner 105819508b20SJan Höppner rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); 105919508b20SJan Höppner if (rc) { 106019508b20SJan Höppner for (chp = 0; chp < 8; chp++) 106119508b20SJan Höppner device->path[chp].fc_security = 0; 106219508b20SJan Höppner return; 106319508b20SJan Höppner } 106419508b20SJan Höppner 106519508b20SJan Höppner for (chp = 0; chp < 8; chp++) { 106619508b20SJan Höppner if (esm_valid & (0x80 >> chp)) 106719508b20SJan Höppner device->path[chp].fc_security = esm[chp]; 106819508b20SJan Höppner else 106919508b20SJan Höppner device->path[chp].fc_security = 0; 1070c7c0c9deSStefan Haberland } 1071c7c0c9deSStefan Haberland } 1072c7c0c9deSStefan Haberland 1073542e30ceSStefan Haberland static void dasd_eckd_get_uid_string(struct dasd_conf *conf, 107423596961SStefan Haberland char *print_uid) 107523596961SStefan Haberland { 1076542e30ceSStefan Haberland struct dasd_uid uid; 107723596961SStefan Haberland 1078542e30ceSStefan Haberland create_uid(conf, &uid); 1079542e30ceSStefan Haberland if (strlen(uid.vduit) > 0) 108023596961SStefan Haberland snprintf(print_uid, sizeof(*print_uid), 108123596961SStefan Haberland "%s.%s.%04x.%02x.%s", 1082542e30ceSStefan Haberland uid.vendor, uid.serial, uid.ssid, 1083542e30ceSStefan Haberland uid.real_unit_addr, uid.vduit); 108423596961SStefan Haberland else 108523596961SStefan Haberland snprintf(print_uid, sizeof(*print_uid), 108623596961SStefan Haberland "%s.%s.%04x.%02x", 1087542e30ceSStefan Haberland uid.vendor, uid.serial, uid.ssid, 1088542e30ceSStefan Haberland uid.real_unit_addr); 108923596961SStefan Haberland } 109023596961SStefan Haberland 109123596961SStefan Haberland static int dasd_eckd_check_cabling(struct dasd_device *device, 109223596961SStefan Haberland void *conf_data, __u8 lpm) 109323596961SStefan Haberland { 109423596961SStefan Haberland struct dasd_eckd_private *private = device->private; 109523596961SStefan Haberland char print_path_uid[60], print_device_uid[60]; 1096542e30ceSStefan Haberland struct dasd_conf path_conf; 109723596961SStefan Haberland 1098542e30ceSStefan Haberland path_conf.data = conf_data; 1099542e30ceSStefan Haberland path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1100542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_conf)) 110123596961SStefan Haberland return 1; 110223596961SStefan Haberland 1103542e30ceSStefan Haberland if (dasd_eckd_compare_path_uid(device, &path_conf)) { 1104542e30ceSStefan Haberland dasd_eckd_get_uid_string(&path_conf, print_path_uid); 1105542e30ceSStefan Haberland dasd_eckd_get_uid_string(&private->conf, print_device_uid); 110623596961SStefan Haberland dev_err(&device->cdev->dev, 110723596961SStefan Haberland "Not all channel paths lead to the same device, path %02X leads to device %s instead of %s\n", 110823596961SStefan Haberland lpm, print_path_uid, print_device_uid); 110923596961SStefan Haberland return 1; 111023596961SStefan Haberland } 111123596961SStefan Haberland 111223596961SStefan Haberland return 0; 111323596961SStefan Haberland } 111423596961SStefan Haberland 11154abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 11161da177e4SLinus Torvalds { 11171da177e4SLinus Torvalds void *conf_data; 11181da177e4SLinus Torvalds int conf_len, conf_data_saved; 1119b179b037SStefan Haberland int rc, path_err, pos; 1120a4d26c6aSStefan Weinhuber __u8 lpm, opm; 112123596961SStefan Haberland struct dasd_eckd_private *private; 11221da177e4SLinus Torvalds 1123543691a4SSebastian Ott private = device->private; 1124a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 11251da177e4SLinus Torvalds conf_data_saved = 0; 112655d3a85cSStefan Haberland path_err = 0; 11271da177e4SLinus Torvalds /* get configuration data per operational path */ 11281da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1129b206181dSStefan Haberland if (!(lpm & opm)) 1130b206181dSStefan Haberland continue; 113117283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 11321da177e4SLinus Torvalds &conf_len, lpm); 11331da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1134b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 11351da177e4SLinus Torvalds "Read configuration data returned " 1136b8ed5dd5SStefan Haberland "error %d", rc); 11371da177e4SLinus Torvalds return rc; 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds if (conf_data == NULL) { 1140b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1141b8ed5dd5SStefan Haberland "No configuration data " 1142b8ed5dd5SStefan Haberland "retrieved"); 1143a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1144c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1145d133a960SGabriel Craciunescu continue; /* no error */ 11461da177e4SLinus Torvalds } 11471da177e4SLinus Torvalds /* save first valid configuration data */ 11481da177e4SLinus Torvalds if (!conf_data_saved) { 1149c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1150c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 1151542e30ceSStefan Haberland private->conf.data = conf_data; 1152542e30ceSStefan Haberland private->conf.len = conf_len; 1153542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&private->conf)) { 1154542e30ceSStefan Haberland private->conf.data = NULL; 1155542e30ceSStefan Haberland private->conf.len = 0; 11564abb08c2SStefan Weinhuber kfree(conf_data); 11574abb08c2SStefan Weinhuber continue; 11584abb08c2SStefan Weinhuber } 1159b206181dSStefan Haberland /* 1160b206181dSStefan Haberland * build device UID that other path data 1161b206181dSStefan Haberland * can be compared to it 1162b206181dSStefan Haberland */ 1163b206181dSStefan Haberland dasd_eckd_generate_uid(device); 11641da177e4SLinus Torvalds conf_data_saved++; 116523596961SStefan Haberland } else if (dasd_eckd_check_cabling(device, conf_data, lpm)) { 116623596961SStefan Haberland dasd_path_add_cablepm(device, lpm); 116723596961SStefan Haberland path_err = -EINVAL; 1168b206181dSStefan Haberland kfree(conf_data); 1169b206181dSStefan Haberland continue; 1170b206181dSStefan Haberland } 1171d2a52758SJan Höppner 1172d2a52758SJan Höppner pos = pathmask_to_pos(lpm); 1173d2a52758SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 1174d2a52758SJan Höppner 11754abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11761da177e4SLinus Torvalds case 0x02: 1177c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11781da177e4SLinus Torvalds break; 11791da177e4SLinus Torvalds case 0x03: 1180c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11811da177e4SLinus Torvalds break; 11821da177e4SLinus Torvalds } 1183c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1184c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1185ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1186ccc0e7dcSStefan Haberland } else { 1187c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1188ccc0e7dcSStefan Haberland } 11891da177e4SLinus Torvalds } 1190b206181dSStefan Haberland 119155d3a85cSStefan Haberland return path_err; 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 1194a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1195a521b048SStefan Haberland { 1196a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1197a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1198dd4b3c83SJan Höppner unsigned int mdc; 1199dd4b3c83SJan Höppner int tpm; 1200a521b048SStefan Haberland 1201a521b048SStefan Haberland if (dasd_nofcx) 1202a521b048SStefan Haberland return 0; 1203a521b048SStefan Haberland /* is transport mode supported? */ 1204a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1205542e30ceSStefan Haberland fcx_in_gneq = private->conf.gneq->reserved2[7] & 0x04; 1206a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1207a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1208a521b048SStefan Haberland 1209a521b048SStefan Haberland if (!tpm) 1210a521b048SStefan Haberland return 0; 1211a521b048SStefan Haberland 1212a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1213dd4b3c83SJan Höppner if (mdc == 0) { 1214a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1215a521b048SStefan Haberland return 0; 1216a521b048SStefan Haberland } else { 1217a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1218a521b048SStefan Haberland } 1219a521b048SStefan Haberland } 1220a521b048SStefan Haberland 1221a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1222a4d26c6aSStefan Weinhuber { 1223543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1224dd4b3c83SJan Höppner unsigned int mdc; 1225a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1226a4d26c6aSStefan Weinhuber 1227a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1228a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1229dd4b3c83SJan Höppner if (mdc == 0) { 1230a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1231a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1232a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1233a4d26c6aSStefan Weinhuber mdc, lpm); 1234a4d26c6aSStefan Weinhuber return mdc; 1235a4d26c6aSStefan Weinhuber } 12360f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1237a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1238a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1239a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1240a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1241a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1242a4d26c6aSStefan Weinhuber private->fcx_max_data); 1243a4d26c6aSStefan Weinhuber return -EACCES; 1244a4d26c6aSStefan Weinhuber } 1245a4d26c6aSStefan Weinhuber } 1246a4d26c6aSStefan Weinhuber return 0; 1247a4d26c6aSStefan Weinhuber } 1248a4d26c6aSStefan Weinhuber 1249b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1250b7294932SJan Höppner struct pe_handler_work_data *data) 1251b206181dSStefan Haberland { 1252543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1253c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1254543691a4SSebastian Ott int rc = -ENODEV; 1255b206181dSStefan Haberland 1256b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1257b206181dSStefan Haberland if (!(lpm & opm)) 1258b206181dSStefan Haberland continue; 1259b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1260b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1261b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1262b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1263b206181dSStefan Haberland data->rcd_buffer, 1264b206181dSStefan Haberland lpm); 1265b206181dSStefan Haberland 1266b206181dSStefan Haberland if (rc) { 1267b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1268b206181dSStefan Haberland continue; 1269b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1270b206181dSStefan Haberland "Read configuration data " 1271b206181dSStefan Haberland "returned error %d", rc); 1272b206181dSStefan Haberland break; 1273b206181dSStefan Haberland } 1274542e30ceSStefan Haberland memcpy(private->conf.data, data->rcd_buffer, 1275b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1276542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&private->conf)) { 1277b206181dSStefan Haberland rc = -ENODEV; 1278b206181dSStefan Haberland } else /* first valid path is enough */ 1279b206181dSStefan Haberland break; 1280b206181dSStefan Haberland } 1281b206181dSStefan Haberland 1282b206181dSStefan Haberland if (!rc) 1283b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1284b206181dSStefan Haberland 1285b206181dSStefan Haberland return rc; 1286b206181dSStefan Haberland } 1287b206181dSStefan Haberland 1288b7294932SJan Höppner static void dasd_eckd_path_available_action(struct dasd_device *device, 1289b7294932SJan Höppner struct pe_handler_work_data *data) 1290a4d26c6aSStefan Weinhuber { 1291b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12925db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 129346018121SJan Höppner struct dasd_conf_data *conf_data; 1294542e30ceSStefan Haberland struct dasd_conf path_conf; 1295a4d26c6aSStefan Weinhuber unsigned long flags; 1296b206181dSStefan Haberland char print_uid[60]; 129746018121SJan Höppner int rc, pos; 1298a4d26c6aSStefan Weinhuber 1299a4d26c6aSStefan Weinhuber opm = 0; 1300a4d26c6aSStefan Weinhuber npm = 0; 1301a4d26c6aSStefan Weinhuber ppm = 0; 1302a4d26c6aSStefan Weinhuber epm = 0; 13035db8440cSStefan Haberland hpfpm = 0; 13045db8440cSStefan Haberland cablepm = 0; 13055db8440cSStefan Haberland 1306a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1307b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1308b206181dSStefan Haberland continue; 1309b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1310a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1311a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1312a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1313a4d26c6aSStefan Weinhuber data->rcd_buffer, 1314a4d26c6aSStefan Weinhuber lpm); 1315a4d26c6aSStefan Weinhuber if (!rc) { 1316a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1317b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1318b206181dSStefan Haberland ) { 1319a4d26c6aSStefan Weinhuber case 0x02: 1320a4d26c6aSStefan Weinhuber npm |= lpm; 1321a4d26c6aSStefan Weinhuber break; 1322a4d26c6aSStefan Weinhuber case 0x03: 1323a4d26c6aSStefan Weinhuber ppm |= lpm; 1324a4d26c6aSStefan Weinhuber break; 1325a4d26c6aSStefan Weinhuber } 1326a4d26c6aSStefan Weinhuber opm |= lpm; 1327a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1328a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1329a4d26c6aSStefan Weinhuber "path verification: No configuration " 1330a4d26c6aSStefan Weinhuber "data retrieved"); 1331a4d26c6aSStefan Weinhuber opm |= lpm; 1332a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1333a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1334a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1335a4d26c6aSStefan Weinhuber " try again later"); 1336a4d26c6aSStefan Weinhuber epm |= lpm; 1337a4d26c6aSStefan Weinhuber } else { 1338a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1339a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1340a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1341a4d26c6aSStefan Weinhuber continue; 1342a4d26c6aSStefan Weinhuber } 1343a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1344a4d26c6aSStefan Weinhuber opm &= ~lpm; 1345a4d26c6aSStefan Weinhuber npm &= ~lpm; 1346a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13475db8440cSStefan Haberland hpfpm |= lpm; 1348b206181dSStefan Haberland continue; 1349b206181dSStefan Haberland } 1350b206181dSStefan Haberland 1351b206181dSStefan Haberland /* 1352b206181dSStefan Haberland * save conf_data for comparison after 1353b206181dSStefan Haberland * rebuild_device_uid may have changed 1354b206181dSStefan Haberland * the original data 1355b206181dSStefan Haberland */ 1356b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1357b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1358542e30ceSStefan Haberland path_conf.data = (void *)&path_rcd_buf; 1359542e30ceSStefan Haberland path_conf.len = DASD_ECKD_RCD_DATA_SIZE; 1360542e30ceSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_conf)) { 1361542e30ceSStefan Haberland path_conf.data = NULL; 1362542e30ceSStefan Haberland path_conf.len = 0; 1363b206181dSStefan Haberland continue; 1364b206181dSStefan Haberland } 1365b206181dSStefan Haberland 1366b206181dSStefan Haberland /* 1367b206181dSStefan Haberland * compare path UID with device UID only if at least 1368b206181dSStefan Haberland * one valid path is left 1369b206181dSStefan Haberland * in other case the device UID may have changed and 1370b206181dSStefan Haberland * the first working path UID will be used as device UID 1371b206181dSStefan Haberland */ 1372c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1373542e30ceSStefan Haberland dasd_eckd_compare_path_uid(device, &path_conf)) { 1374b206181dSStefan Haberland /* 1375b206181dSStefan Haberland * the comparison was not successful 1376b206181dSStefan Haberland * rebuild the device UID with at least one 1377b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1378b206181dSStefan Haberland * has changed the device 1379b206181dSStefan Haberland * 1380b206181dSStefan Haberland * after this compare again 1381b206181dSStefan Haberland * 1382b206181dSStefan Haberland * if either the rebuild or the recompare fails 1383b206181dSStefan Haberland * the path can not be used 1384b206181dSStefan Haberland */ 1385b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1386b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1387542e30ceSStefan Haberland device, &path_conf)) { 1388542e30ceSStefan Haberland dasd_eckd_get_uid_string(&path_conf, print_uid); 1389b206181dSStefan Haberland dev_err(&device->cdev->dev, 1390b206181dSStefan Haberland "The newly added channel path %02X " 1391b206181dSStefan Haberland "will not be used because it leads " 1392b206181dSStefan Haberland "to a different device %s\n", 1393b206181dSStefan Haberland lpm, print_uid); 1394b206181dSStefan Haberland opm &= ~lpm; 1395b206181dSStefan Haberland npm &= ~lpm; 1396b206181dSStefan Haberland ppm &= ~lpm; 13975db8440cSStefan Haberland cablepm |= lpm; 1398b206181dSStefan Haberland continue; 1399a4d26c6aSStefan Weinhuber } 1400a4d26c6aSStefan Weinhuber } 1401b206181dSStefan Haberland 140246018121SJan Höppner conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); 140346018121SJan Höppner if (conf_data) { 140446018121SJan Höppner memcpy(conf_data, data->rcd_buffer, 140546018121SJan Höppner DASD_ECKD_RCD_DATA_SIZE); 14069dffede0SStefan Haberland } else { 14079dffede0SStefan Haberland /* 14089dffede0SStefan Haberland * path is operational but path config data could not 14099dffede0SStefan Haberland * be stored due to low mem condition 14109dffede0SStefan Haberland * add it to the error path mask and schedule a path 14119dffede0SStefan Haberland * verification later that this could be added again 14129dffede0SStefan Haberland */ 14139dffede0SStefan Haberland epm |= lpm; 141446018121SJan Höppner } 141546018121SJan Höppner pos = pathmask_to_pos(lpm); 141646018121SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 141746018121SJan Höppner 1418a4d26c6aSStefan Weinhuber /* 1419a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1420a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1421a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1422a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1423a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1424a4d26c6aSStefan Weinhuber */ 1425a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1426c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1427c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1428a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14295db8440cSStefan Haberland } else { 1430c9346151SStefan Haberland dasd_path_add_opm(device, opm); 14315db8440cSStefan Haberland } 1432c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1433c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 14349dffede0SStefan Haberland if (epm) { 1435c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 14369dffede0SStefan Haberland dasd_device_set_timer(device, 50); 14379dffede0SStefan Haberland } 1438c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1439c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1440a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 144119508b20SJan Höppner 144219508b20SJan Höppner dasd_path_create_kobj(device, pos); 1443b206181dSStefan Haberland } 1444b7294932SJan Höppner } 1445b7294932SJan Höppner 1446b7294932SJan Höppner static void do_pe_handler_work(struct work_struct *work) 1447b7294932SJan Höppner { 1448b7294932SJan Höppner struct pe_handler_work_data *data; 1449b7294932SJan Höppner struct dasd_device *device; 1450b7294932SJan Höppner 1451b7294932SJan Höppner data = container_of(work, struct pe_handler_work_data, worker); 1452b7294932SJan Höppner device = data->device; 1453b7294932SJan Höppner 1454b7294932SJan Höppner /* delay path verification until device was resumed */ 1455b7294932SJan Höppner if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1456b7294932SJan Höppner schedule_work(work); 1457b7294932SJan Höppner return; 1458b7294932SJan Höppner } 1459b7294932SJan Höppner /* check if path verification already running and delay if so */ 1460b7294932SJan Höppner if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1461b7294932SJan Höppner schedule_work(work); 1462b7294932SJan Höppner return; 1463b7294932SJan Höppner } 1464b7294932SJan Höppner 14654d063e64SJan Höppner if (data->tbvpm) 1466b7294932SJan Höppner dasd_eckd_path_available_action(device, data); 14674d063e64SJan Höppner if (data->fcsecpm) 14684d063e64SJan Höppner dasd_eckd_read_fc_security(device); 1469b7294932SJan Höppner 14701eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1471a4d26c6aSStefan Weinhuber dasd_put_device(device); 1472a4d26c6aSStefan Weinhuber if (data->isglobal) 1473b7294932SJan Höppner mutex_unlock(&dasd_pe_handler_mutex); 1474a4d26c6aSStefan Weinhuber else 1475a4d26c6aSStefan Weinhuber kfree(data); 1476a4d26c6aSStefan Weinhuber } 1477a4d26c6aSStefan Weinhuber 14784d063e64SJan Höppner static int dasd_eckd_pe_handler(struct dasd_device *device, 14794d063e64SJan Höppner __u8 tbvpm, __u8 fcsecpm) 1480a4d26c6aSStefan Weinhuber { 1481b7294932SJan Höppner struct pe_handler_work_data *data; 1482a4d26c6aSStefan Weinhuber 1483f1c8781aSHaowen Bai data = kzalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1484a4d26c6aSStefan Weinhuber if (!data) { 1485b7294932SJan Höppner if (mutex_trylock(&dasd_pe_handler_mutex)) { 1486b7294932SJan Höppner data = pe_handler_worker; 1487a4d26c6aSStefan Weinhuber data->isglobal = 1; 1488b7294932SJan Höppner } else { 1489a4d26c6aSStefan Weinhuber return -ENOMEM; 1490b7294932SJan Höppner } 1491a4d26c6aSStefan Weinhuber } 1492b7294932SJan Höppner INIT_WORK(&data->worker, do_pe_handler_work); 1493a4d26c6aSStefan Weinhuber dasd_get_device(device); 1494a4d26c6aSStefan Weinhuber data->device = device; 14954d063e64SJan Höppner data->tbvpm = tbvpm; 14964d063e64SJan Höppner data->fcsecpm = fcsecpm; 1497a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1498a4d26c6aSStefan Weinhuber return 0; 1499a4d26c6aSStefan Weinhuber } 1500a4d26c6aSStefan Weinhuber 1501a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1502a521b048SStefan Haberland { 1503a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1504a521b048SStefan Haberland unsigned long flags; 1505a521b048SStefan Haberland 1506a521b048SStefan Haberland if (!private->fcx_max_data) 1507a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1508a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1509a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1510a521b048SStefan Haberland dasd_schedule_device_bh(device); 1511a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1512a521b048SStefan Haberland } 1513a521b048SStefan Haberland 15148e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 15158e09f215SStefan Weinhuber { 1516543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 15178e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 15188e09f215SStefan Weinhuber struct dasd_rssd_features *features; 15198e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 15208e09f215SStefan Weinhuber struct ccw1 *ccw; 15218e09f215SStefan Weinhuber int rc; 15228e09f215SStefan Weinhuber 152368d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 152468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 15258e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 15268e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1527c5205f2fSSebastian Ott device, NULL); 15288e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1529b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1530b8ed5dd5SStefan Haberland "allocate initialization request"); 15318e09f215SStefan Weinhuber return PTR_ERR(cqr); 15328e09f215SStefan Weinhuber } 15338e09f215SStefan Weinhuber cqr->startdev = device; 15348e09f215SStefan Weinhuber cqr->memdev = device; 15358e09f215SStefan Weinhuber cqr->block = NULL; 1536eb6e199bSStefan Weinhuber cqr->retries = 256; 15378e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 15388e09f215SStefan Weinhuber 15398e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 15408e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15418e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 15428e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 15438e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 15448e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 15458e09f215SStefan Weinhuber 15468e09f215SStefan Weinhuber ccw = cqr->cpaddr; 15478e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 15488e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 15498e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 15508e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 15518e09f215SStefan Weinhuber 15528e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 15538e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15548e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15558e09f215SStefan Weinhuber 15568e09f215SStefan Weinhuber ccw++; 15578e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15588e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 15598e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 15608e09f215SStefan Weinhuber 15611aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15628e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15638e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15648e09f215SStefan Weinhuber if (rc == 0) { 15658e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15668e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15678e09f215SStefan Weinhuber memcpy(&private->features, features, 15688e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 156968d1e5f0SStefan Weinhuber } else 157068d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 157168d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15728e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15738e09f215SStefan Weinhuber return rc; 15748e09f215SStefan Weinhuber } 15758e09f215SStefan Weinhuber 1576c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1577c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1578c729696bSJan Höppner { 1579c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1580c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1581c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1582c729696bSJan Höppner struct dasd_ccw_req *cqr; 1583c729696bSJan Höppner struct ccw1 *ccw; 15849e12e54cSJan Höppner int useglobal; 1585c729696bSJan Höppner int rc; 1586c729696bSJan Höppner 1587c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1588c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1589c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1590c729696bSJan Höppner return 0; 1591c729696bSJan Höppner 15929e12e54cSJan Höppner useglobal = 0; 1593c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1594c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1595c729696bSJan Höppner if (IS_ERR(cqr)) { 1596c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1597c729696bSJan Höppner "Could not allocate initialization request"); 15989e12e54cSJan Höppner mutex_lock(&dasd_vol_info_mutex); 15999e12e54cSJan Höppner useglobal = 1; 16009e12e54cSJan Höppner cqr = &dasd_vol_info_req->cqr; 16019e12e54cSJan Höppner memset(cqr, 0, sizeof(*cqr)); 16029e12e54cSJan Höppner memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 16039e12e54cSJan Höppner cqr->cpaddr = &dasd_vol_info_req->ccw; 16049e12e54cSJan Höppner cqr->data = &dasd_vol_info_req->data; 16059e12e54cSJan Höppner cqr->magic = DASD_ECKD_MAGIC; 1606c729696bSJan Höppner } 1607c729696bSJan Höppner 1608c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1609c729696bSJan Höppner prssdp = cqr->data; 1610c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1611c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1612542e30ceSStefan Haberland prssdp->lss = private->conf.ned->ID; 1613542e30ceSStefan Haberland prssdp->volume = private->conf.ned->unit_addr; 1614c729696bSJan Höppner 1615c729696bSJan Höppner ccw = cqr->cpaddr; 1616c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1617c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1618c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1619c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1620c729696bSJan Höppner 1621c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1622c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1623c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1624c729696bSJan Höppner 1625c729696bSJan Höppner ccw++; 1626c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1627c729696bSJan Höppner ccw->count = sizeof(*vsq); 1628c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1629c729696bSJan Höppner ccw->cda = (__u32)(addr_t)vsq; 1630c729696bSJan Höppner 1631c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1632c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1633c729696bSJan Höppner cqr->startdev = device; 1634c729696bSJan Höppner cqr->memdev = device; 1635c729696bSJan Höppner cqr->block = NULL; 1636c729696bSJan Höppner cqr->retries = 256; 1637c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1638c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1639c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1640c729696bSJan Höppner 1641c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1642c729696bSJan Höppner if (rc == 0) { 1643c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1644c729696bSJan Höppner } else { 1645dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1646dd454839SJan Höppner "Reading the volume storage information failed with rc=%d", rc); 1647c729696bSJan Höppner } 1648c729696bSJan Höppner 16499e12e54cSJan Höppner if (useglobal) 16509e12e54cSJan Höppner mutex_unlock(&dasd_vol_info_mutex); 16519e12e54cSJan Höppner else 1652c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1653c729696bSJan Höppner 1654c729696bSJan Höppner return rc; 1655c729696bSJan Höppner } 1656c729696bSJan Höppner 1657c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1658c729696bSJan Höppner { 1659c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1660c729696bSJan Höppner 1661c729696bSJan Höppner return private->vsq.vol_info.ese; 1662c729696bSJan Höppner } 1663c729696bSJan Höppner 1664c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1665c729696bSJan Höppner { 1666c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1667c729696bSJan Höppner 1668c729696bSJan Höppner return private->vsq.extent_pool_id; 1669c729696bSJan Höppner } 1670c729696bSJan Höppner 1671c729696bSJan Höppner /* 1672c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1673c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1674c729696bSJan Höppner * The data for this value is therefore updated on any call. 1675c729696bSJan Höppner */ 1676c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1677c729696bSJan Höppner { 1678c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1679c729696bSJan Höppner int rc; 1680c729696bSJan Höppner 1681c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1682c729696bSJan Höppner 1683c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1684c729696bSJan Höppner } 1685c729696bSJan Höppner 1686c729696bSJan Höppner /* 1687c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1688c729696bSJan Höppner * therefore updated on any call. 1689c729696bSJan Höppner */ 1690c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1691c729696bSJan Höppner { 1692c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1693c729696bSJan Höppner int rc; 1694c729696bSJan Höppner 1695c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1696c729696bSJan Höppner 1697c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1698c729696bSJan Höppner } 1699c729696bSJan Höppner 1700c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1701c729696bSJan Höppner { 1702c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1703c729696bSJan Höppner 1704c729696bSJan Höppner return private->vsq.logical_capacity; 1705c729696bSJan Höppner } 1706c729696bSJan Höppner 17079e12e54cSJan Höppner static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 17089e12e54cSJan Höppner { 17099e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17109e12e54cSJan Höppner struct dasd_device *device; 17119e12e54cSJan Höppner struct dasd_device *base; 17129e12e54cSJan Höppner 17139e12e54cSJan Höppner data = container_of(work, struct ext_pool_exhaust_work_data, worker); 17149e12e54cSJan Höppner device = data->device; 17159e12e54cSJan Höppner base = data->base; 17169e12e54cSJan Höppner 17179e12e54cSJan Höppner if (!base) 17189e12e54cSJan Höppner base = device; 17199e12e54cSJan Höppner if (dasd_eckd_space_configured(base) != 0) { 17209e12e54cSJan Höppner dasd_generic_space_avail(device); 17219e12e54cSJan Höppner } else { 17229e12e54cSJan Höppner dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 17239e12e54cSJan Höppner DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 17249e12e54cSJan Höppner } 17259e12e54cSJan Höppner 17269e12e54cSJan Höppner dasd_put_device(device); 17279e12e54cSJan Höppner kfree(data); 17289e12e54cSJan Höppner } 17299e12e54cSJan Höppner 17309e12e54cSJan Höppner static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 17319e12e54cSJan Höppner struct dasd_ccw_req *cqr) 17329e12e54cSJan Höppner { 17339e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17349e12e54cSJan Höppner 17359e12e54cSJan Höppner data = kzalloc(sizeof(*data), GFP_ATOMIC); 17369e12e54cSJan Höppner if (!data) 17379e12e54cSJan Höppner return -ENOMEM; 17389e12e54cSJan Höppner INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 17399e12e54cSJan Höppner dasd_get_device(device); 17409e12e54cSJan Höppner data->device = device; 17419e12e54cSJan Höppner 17429e12e54cSJan Höppner if (cqr->block) 17439e12e54cSJan Höppner data->base = cqr->block->base; 17449e12e54cSJan Höppner else if (cqr->basedev) 17459e12e54cSJan Höppner data->base = cqr->basedev; 17469e12e54cSJan Höppner else 17479e12e54cSJan Höppner data->base = NULL; 17489e12e54cSJan Höppner 17499e12e54cSJan Höppner schedule_work(&data->worker); 17509e12e54cSJan Höppner 17519e12e54cSJan Höppner return 0; 17529e12e54cSJan Höppner } 17539e12e54cSJan Höppner 1754c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1755c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1756c729696bSJan Höppner { 1757c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1758c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1759c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1760c729696bSJan Höppner int i; 1761c729696bSJan Höppner 1762c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1763c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1764c729696bSJan Höppner if (eps.pool_id == pool_id) { 1765c729696bSJan Höppner memcpy(&private->eps, &eps, 1766c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1767c729696bSJan Höppner } 1768c729696bSJan Höppner } 1769c729696bSJan Höppner } 1770c729696bSJan Höppner 1771c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1772c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1773c729696bSJan Höppner { 1774c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1775c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1776c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1777c729696bSJan Höppner struct dasd_ccw_req *cqr; 1778c729696bSJan Höppner struct ccw1 *ccw; 1779c729696bSJan Höppner int rc; 1780c729696bSJan Höppner 1781c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1782c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1783c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1784c729696bSJan Höppner return 0; 1785c729696bSJan Höppner 1786c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1787c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1788c729696bSJan Höppner if (IS_ERR(cqr)) { 1789c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1790c729696bSJan Höppner "Could not allocate initialization request"); 1791c729696bSJan Höppner return PTR_ERR(cqr); 1792c729696bSJan Höppner } 1793c729696bSJan Höppner 1794c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1795c729696bSJan Höppner prssdp = cqr->data; 1796c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1797c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1798c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1799c729696bSJan Höppner 1800c729696bSJan Höppner ccw = cqr->cpaddr; 1801c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1802c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1803c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1804c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1805c729696bSJan Höppner 1806c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1807c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1808c729696bSJan Höppner 1809c729696bSJan Höppner ccw++; 1810c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1811c729696bSJan Höppner ccw->count = sizeof(*lcq); 1812c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1813c729696bSJan Höppner ccw->cda = (__u32)(addr_t)lcq; 1814c729696bSJan Höppner 1815c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1816c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1817c729696bSJan Höppner cqr->startdev = device; 1818c729696bSJan Höppner cqr->memdev = device; 1819c729696bSJan Höppner cqr->block = NULL; 1820c729696bSJan Höppner cqr->retries = 256; 1821c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1822c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1823c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1824c729696bSJan Höppner 1825c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1826c729696bSJan Höppner if (rc == 0) { 1827c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1828c729696bSJan Höppner } else { 1829dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1830dd454839SJan Höppner "Reading the logical configuration failed with rc=%d", rc); 1831c729696bSJan Höppner } 1832c729696bSJan Höppner 1833c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1834c729696bSJan Höppner 1835c729696bSJan Höppner return rc; 1836c729696bSJan Höppner } 1837c729696bSJan Höppner 1838c729696bSJan Höppner /* 1839c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1840c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1841c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1842c729696bSJan Höppner */ 1843c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1844c729696bSJan Höppner { 1845c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1846c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1847c729696bSJan Höppner 1848c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1849c729696bSJan Höppner return 0; 1850c729696bSJan Höppner if (eps.extent_size.size_1G) 1851c729696bSJan Höppner return 1113; 1852c729696bSJan Höppner if (eps.extent_size.size_16M) 1853c729696bSJan Höppner return 21; 1854c729696bSJan Höppner 1855c729696bSJan Höppner return 0; 1856c729696bSJan Höppner } 1857c729696bSJan Höppner 1858c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1859c729696bSJan Höppner { 1860c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1861c729696bSJan Höppner 1862c729696bSJan Höppner return private->eps.warn_thrshld; 1863c729696bSJan Höppner } 1864c729696bSJan Höppner 1865c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1866c729696bSJan Höppner { 1867c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1868c729696bSJan Höppner 1869c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1870c729696bSJan Höppner } 1871c729696bSJan Höppner 1872c729696bSJan Höppner /* 1873c729696bSJan Höppner * Extent Pool out of space 1874c729696bSJan Höppner */ 1875c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1876c729696bSJan Höppner { 1877c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1878c729696bSJan Höppner 1879c729696bSJan Höppner return private->eps.flags.pool_oos; 1880c729696bSJan Höppner } 18818e09f215SStefan Weinhuber 18823d052595SHorst Hummel /* 188340545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 188440545573SHorst Hummel */ 1885f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1886f3eb5384SStefan Weinhuber int enable_pav) 188740545573SHorst Hummel { 188840545573SHorst Hummel struct dasd_ccw_req *cqr; 188940545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 189040545573SHorst Hummel struct ccw1 *ccw; 189140545573SHorst Hummel 189268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 189340545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1894c5205f2fSSebastian Ott device, NULL); 189540545573SHorst Hummel 189640545573SHorst Hummel if (IS_ERR(cqr)) { 1897fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 189840545573SHorst Hummel "Could not allocate PSF-SSC request"); 189940545573SHorst Hummel return cqr; 190040545573SHorst Hummel } 190140545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 190240545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1903626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1904f3eb5384SStefan Weinhuber if (enable_pav) { 1905626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 19068e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1907f3eb5384SStefan Weinhuber } 190840545573SHorst Hummel ccw = cqr->cpaddr; 190940545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 191040545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 191140545573SHorst Hummel ccw->count = 66; 191240545573SHorst Hummel 19138e09f215SStefan Weinhuber cqr->startdev = device; 19148e09f215SStefan Weinhuber cqr->memdev = device; 19158e09f215SStefan Weinhuber cqr->block = NULL; 1916eb6e199bSStefan Weinhuber cqr->retries = 256; 191740545573SHorst Hummel cqr->expires = 10*HZ; 19181aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 191940545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 192040545573SHorst Hummel return cqr; 192140545573SHorst Hummel } 192240545573SHorst Hummel 192340545573SHorst Hummel /* 192440545573SHorst Hummel * Perform Subsystem Function. 192540545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 192640545573SHorst Hummel * call might change behaviour of DASD devices. 192740545573SHorst Hummel */ 192840545573SHorst Hummel static int 192912d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 193012d7b107SStefan Haberland unsigned long flags) 193140545573SHorst Hummel { 193240545573SHorst Hummel struct dasd_ccw_req *cqr; 193340545573SHorst Hummel int rc; 193440545573SHorst Hummel 1935f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 193640545573SHorst Hummel if (IS_ERR(cqr)) 193740545573SHorst Hummel return PTR_ERR(cqr); 193840545573SHorst Hummel 193912d7b107SStefan Haberland /* 194012d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 194112d7b107SStefan Haberland * the calling function should handle failed requests 194212d7b107SStefan Haberland */ 194312d7b107SStefan Haberland cqr->flags |= flags; 194412d7b107SStefan Haberland 194540545573SHorst Hummel rc = dasd_sleep_on(cqr); 194640545573SHorst Hummel if (!rc) 194740545573SHorst Hummel /* trigger CIO to reprobe devices */ 194840545573SHorst Hummel css_schedule_reprobe(); 194912d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 195012d7b107SStefan Haberland rc = -EAGAIN; 195112d7b107SStefan Haberland 19528e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 195340545573SHorst Hummel return rc; 195440545573SHorst Hummel } 195540545573SHorst Hummel 195640545573SHorst Hummel /* 195740545573SHorst Hummel * Valide storage server of current device. 195840545573SHorst Hummel */ 195912d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 196012d7b107SStefan Haberland unsigned long flags) 196140545573SHorst Hummel { 1962543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1963543691a4SSebastian Ott int enable_pav, rc; 196440545573SHorst Hummel 1965f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1966f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 196712d7b107SStefan Haberland return 0; 196840545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1969f3eb5384SStefan Weinhuber enable_pav = 0; 1970f3eb5384SStefan Weinhuber else 1971f3eb5384SStefan Weinhuber enable_pav = 1; 197212d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1973eb6e199bSStefan Weinhuber 197440545573SHorst Hummel /* may be requested feature is not available on server, 197540545573SHorst Hummel * therefore just report error and go ahead */ 1976b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1977b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 197812d7b107SStefan Haberland return rc; 197940545573SHorst Hummel } 198040545573SHorst Hummel 1981f1633031SStefan Haberland /* 1982f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1983f1633031SStefan Haberland */ 1984f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1985f1633031SStefan Haberland { 1986f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1987f1633031SStefan Haberland kick_validate); 1988ea4da6eaSStefan Haberland unsigned long flags = 0; 1989ea4da6eaSStefan Haberland 1990ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1991ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 199212d7b107SStefan Haberland == -EAGAIN) { 199312d7b107SStefan Haberland /* schedule worker again if failed */ 199412d7b107SStefan Haberland schedule_work(&device->kick_validate); 199512d7b107SStefan Haberland return; 199612d7b107SStefan Haberland } 199712d7b107SStefan Haberland 1998f1633031SStefan Haberland dasd_put_device(device); 1999f1633031SStefan Haberland } 2000f1633031SStefan Haberland 2001f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 2002f1633031SStefan Haberland { 2003f1633031SStefan Haberland dasd_get_device(device); 200425e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 200525e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 200625e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 200725e2cf1cSStefan Haberland dasd_put_device(device); 200825e2cf1cSStefan Haberland return; 200925e2cf1cSStefan Haberland } 2010f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 2011f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 2012f2608cd4SStefan Haberland dasd_put_device(device); 2013f1633031SStefan Haberland } 2014f1633031SStefan Haberland 201540545573SHorst Hummel /* 20163d052595SHorst Hummel * Check device characteristics. 20173d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 20183d052595SHorst Hummel */ 20191da177e4SLinus Torvalds static int 20201da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 20211da177e4SLinus Torvalds { 2022543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 20238e09f215SStefan Weinhuber struct dasd_block *block; 20242dedf0d9SStefan Haberland struct dasd_uid temp_uid; 2025f9f8d02fSStefan Haberland int rc, i; 202633b62a30SStefan Weinhuber int readonly; 20277c8faa86SStefan Haberland unsigned long value; 20281da177e4SLinus Torvalds 2029f1633031SStefan Haberland /* setup work queue for validate server*/ 2030f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 203159a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 203259a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 2033f1633031SStefan Haberland 2034454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 2035454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 2036454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 2037454e1fa1SPeter Oberparleiter return -EIO; 2038454e1fa1SPeter Oberparleiter } 2039454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 2040454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 2041454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 2042454e1fa1SPeter Oberparleiter } 204392636b15SSebastian Ott if (!private) { 204492636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 204592636b15SSebastian Ott if (!private) { 2046fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2047fc19f381SStefan Haberland "Allocating memory for private DASD data " 2048fc19f381SStefan Haberland "failed\n"); 20491da177e4SLinus Torvalds return -ENOMEM; 20501da177e4SLinus Torvalds } 2051543691a4SSebastian Ott device->private = private; 205292636b15SSebastian Ott } else { 205392636b15SSebastian Ott memset(private, 0, sizeof(*private)); 20541da177e4SLinus Torvalds } 20551da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 20561da177e4SLinus Torvalds private->init_cqr_status = -1; 20571da177e4SLinus Torvalds /* Set default cache operations. */ 20581da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 20591da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 20601da177e4SLinus Torvalds 206140545573SHorst Hummel /* Read Configuration Data */ 206240545573SHorst Hummel rc = dasd_eckd_read_conf(device); 206340545573SHorst Hummel if (rc) 20648e09f215SStefan Weinhuber goto out_err1; 206540545573SHorst Hummel 2066a521b048SStefan Haberland /* set some default values */ 20677c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 20681f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 2069a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2070a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 20711f1ee9adSHannes Reinecke 2072542e30ceSStefan Haberland if (private->conf.gneq) { 20737c8faa86SStefan Haberland value = 1; 2074542e30ceSStefan Haberland for (i = 0; i < private->conf.gneq->timeout.value; i++) 20757c8faa86SStefan Haberland value = 10 * value; 2076542e30ceSStefan Haberland value = value * private->conf.gneq->timeout.number; 20777c8faa86SStefan Haberland /* do not accept useless values */ 20787c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 20797c8faa86SStefan Haberland device->default_expires = value; 20807c8faa86SStefan Haberland } 20817c8faa86SStefan Haberland 20822dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 20832dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 20848e09f215SStefan Weinhuber block = dasd_alloc_block(); 20858e09f215SStefan Weinhuber if (IS_ERR(block)) { 2086b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 2087b8ed5dd5SStefan Haberland "could not allocate dasd " 2088b8ed5dd5SStefan Haberland "block structure"); 20898e09f215SStefan Weinhuber rc = PTR_ERR(block); 20908e09f215SStefan Weinhuber goto out_err1; 20918e09f215SStefan Weinhuber } 20928e09f215SStefan Weinhuber device->block = block; 20938e09f215SStefan Weinhuber block->base = device; 20948e09f215SStefan Weinhuber } 20958e09f215SStefan Weinhuber 2096f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 2097f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 2098f9f8d02fSStefan Haberland if (rc) 20998e09f215SStefan Weinhuber goto out_err2; 2100f9f8d02fSStefan Haberland 210112d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 2102f4ac1d02SStefan Weinhuber 2103f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 2104f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 210540545573SHorst Hummel if (rc) 21068e09f215SStefan Weinhuber goto out_err3; 21078e09f215SStefan Weinhuber 210874e2f211SStefan Haberland dasd_eckd_read_fc_security(device); 210919508b20SJan Höppner dasd_path_create_kobjects(device); 211019508b20SJan Höppner 21118e09f215SStefan Weinhuber /* Read Feature Codes */ 211268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 211340545573SHorst Hummel 2114c729696bSJan Höppner /* Read Volume Information */ 2115dd454839SJan Höppner dasd_eckd_read_vol_info(device); 2116c729696bSJan Höppner 2117c729696bSJan Höppner /* Read Extent Pool Information */ 2118dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 2119c729696bSJan Höppner 21201da177e4SLinus Torvalds /* Read Device Characteristics */ 212168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 212268b781feSStefan Haberland &private->rdc_data, 64); 21238e09f215SStefan Weinhuber if (rc) { 2124b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2125b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 21268e09f215SStefan Weinhuber goto out_err3; 21278e09f215SStefan Weinhuber } 212834cd551aSStefan Haberland 212934cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 213034cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 213134cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 213234cd551aSStefan Haberland "support raw-track access\n"); 213334cd551aSStefan Haberland rc = -EINVAL; 213434cd551aSStefan Haberland goto out_err3; 213534cd551aSStefan Haberland } 213634cd551aSStefan Haberland 2137817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 2138b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2139b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 2140b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 2141b44b0ab3SStefan Weinhuber else 2142b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 2143b44b0ab3SStefan Weinhuber 2144ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 2145ef19298bSStefan Weinhuber 214633b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 214733b62a30SStefan Weinhuber if (readonly) 214833b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 214933b62a30SStefan Weinhuber 2150fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 215133b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 21521da177e4SLinus Torvalds private->rdc_data.dev_type, 21531da177e4SLinus Torvalds private->rdc_data.dev_model, 21541da177e4SLinus Torvalds private->rdc_data.cu_type, 21551da177e4SLinus Torvalds private->rdc_data.cu_model.model, 2156b44b0ab3SStefan Weinhuber private->real_cyl, 21571da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 215833b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 215933b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 21608e09f215SStefan Weinhuber return 0; 21618e09f215SStefan Weinhuber 21628e09f215SStefan Weinhuber out_err3: 21638e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 21648e09f215SStefan Weinhuber out_err2: 21658e09f215SStefan Weinhuber dasd_free_block(device->block); 21668e09f215SStefan Weinhuber device->block = NULL; 21678e09f215SStefan Weinhuber out_err1: 216800b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 2169ac55ad2bSJan Höppner dasd_path_remove_kobjects(device); 21708e09f215SStefan Weinhuber kfree(device->private); 21718e09f215SStefan Weinhuber device->private = NULL; 21723d052595SHorst Hummel return rc; 21731da177e4SLinus Torvalds } 21741da177e4SLinus Torvalds 21758e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 21768e09f215SStefan Weinhuber { 2177543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21784abb08c2SStefan Weinhuber 21797c6553d4SStefan Haberland if (!private) 21807c6553d4SStefan Haberland return; 21817c6553d4SStefan Haberland 21828e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 2183542e30ceSStefan Haberland private->conf.ned = NULL; 2184542e30ceSStefan Haberland private->conf.sneq = NULL; 2185542e30ceSStefan Haberland private->conf.vdsneq = NULL; 2186542e30ceSStefan Haberland private->conf.gneq = NULL; 218700b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 2188ac55ad2bSJan Höppner dasd_path_remove_kobjects(device); 21898e09f215SStefan Weinhuber } 21908e09f215SStefan Weinhuber 21911da177e4SLinus Torvalds static struct dasd_ccw_req * 21921da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 21931da177e4SLinus Torvalds { 2194543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21951da177e4SLinus Torvalds struct eckd_count *count_data; 21961da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 21971da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 21981da177e4SLinus Torvalds struct ccw1 *ccw; 21991da177e4SLinus Torvalds int cplength, datasize; 22001da177e4SLinus Torvalds int i; 22011da177e4SLinus Torvalds 22021da177e4SLinus Torvalds cplength = 8; 22031da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2204c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2205c5205f2fSSebastian Ott NULL); 22061da177e4SLinus Torvalds if (IS_ERR(cqr)) 22071da177e4SLinus Torvalds return cqr; 22081da177e4SLinus Torvalds ccw = cqr->cpaddr; 2209ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2210ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 221145f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 22121da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 22131da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 22141da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22151da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 22161da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22171da177e4SLinus Torvalds 22181da177e4SLinus Torvalds count_data = private->count_area; 22191da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22201da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22211da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22221da177e4SLinus Torvalds ccw->flags = 0; 22231da177e4SLinus Torvalds ccw->count = 8; 22241da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 22251da177e4SLinus Torvalds ccw++; 22261da177e4SLinus Torvalds count_data++; 22271da177e4SLinus Torvalds } 22281da177e4SLinus Torvalds 2229ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 22301da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2231ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 22321da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22331da177e4SLinus Torvalds /* Read count ccw. */ 22341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22351da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22361da177e4SLinus Torvalds ccw->flags = 0; 22371da177e4SLinus Torvalds ccw->count = 8; 22381da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 22391da177e4SLinus Torvalds 22408e09f215SStefan Weinhuber cqr->block = NULL; 22418e09f215SStefan Weinhuber cqr->startdev = device; 22428e09f215SStefan Weinhuber cqr->memdev = device; 2243eb6e199bSStefan Weinhuber cqr->retries = 255; 22441aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 22451da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 22469e12e54cSJan Höppner /* Set flags to suppress output for expected errors */ 22479e12e54cSJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22489e12e54cSJan Höppner 22491da177e4SLinus Torvalds return cqr; 22501da177e4SLinus Torvalds } 22511da177e4SLinus Torvalds 2252eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2253eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2254eb6e199bSStefan Weinhuber { 2255eb6e199bSStefan Weinhuber char *sense; 2256eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2257eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2258eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2259eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2260eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2261eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2262eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2263eb6e199bSStefan Weinhuber else 2264eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2265eb6e199bSStefan Weinhuber } else 2266eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2267eb6e199bSStefan Weinhuber } 2268eb6e199bSStefan Weinhuber 22691da177e4SLinus Torvalds /* 22701da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 22711da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 22721da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 22731da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 22741da177e4SLinus Torvalds * for deletion in the meantime). 22751da177e4SLinus Torvalds */ 2276eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2277eb6e199bSStefan Weinhuber void *data) 22781da177e4SLinus Torvalds { 2279543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2280543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22811da177e4SLinus Torvalds 2282eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 22831da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 22841da177e4SLinus Torvalds dasd_kick_device(device); 22851da177e4SLinus Torvalds } 22861da177e4SLinus Torvalds 2287eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 22881da177e4SLinus Torvalds { 22891da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 22901da177e4SLinus Torvalds 22918e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 22921da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 22931da177e4SLinus Torvalds return PTR_ERR(init_cqr); 22941da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 22951da177e4SLinus Torvalds init_cqr->callback_data = NULL; 22961da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2297eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2298eb6e199bSStefan Weinhuber * devices as special case 2299eb6e199bSStefan Weinhuber */ 2300eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2301eb6e199bSStefan Weinhuber init_cqr->retries = 0; 23021da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 23031da177e4SLinus Torvalds return -EAGAIN; 23041da177e4SLinus Torvalds } 23051da177e4SLinus Torvalds 2306eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 23071da177e4SLinus Torvalds { 2308543691a4SSebastian Ott struct dasd_device *device = block->base; 2309543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 23101da177e4SLinus Torvalds struct eckd_count *count_area; 23111da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 23121da177e4SLinus Torvalds int status, i; 2313eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 23141da177e4SLinus Torvalds 23151da177e4SLinus Torvalds status = private->init_cqr_status; 23161da177e4SLinus Torvalds private->init_cqr_status = -1; 2317eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2318eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2319eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2320eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2321eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2322eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2323eb6e199bSStefan Weinhuber } 2324eb6e199bSStefan Weinhuber 2325e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2326e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2327e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2328e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2329e4dbb0f2SStefan Haberland goto raw; 2330e4dbb0f2SStefan Haberland } 2331e4dbb0f2SStefan Haberland 2332eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2333eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 23341da177e4SLinus Torvalds return -EMEDIUMTYPE; 2335eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2336eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2337eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2338eb6e199bSStefan Weinhuber "of an I/O error\n"); 2339eb6e199bSStefan Weinhuber return -EIO; 23401da177e4SLinus Torvalds } 23411da177e4SLinus Torvalds 23421da177e4SLinus Torvalds private->uses_cdl = 1; 23431da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 23441da177e4SLinus Torvalds count_area = NULL; 23451da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 23461da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 23473bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 23483bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23493bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23503bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 23511da177e4SLinus Torvalds private->uses_cdl = 0; 23521da177e4SLinus Torvalds break; 23531da177e4SLinus Torvalds } 23541da177e4SLinus Torvalds } 23551da177e4SLinus Torvalds if (i == 3) 2356ce6915f5SJan Höppner count_area = &private->count_area[3]; 23571da177e4SLinus Torvalds 23581da177e4SLinus Torvalds if (private->uses_cdl == 0) { 23591da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 23601da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 23611da177e4SLinus Torvalds (private->count_area[i].dl != 23623bc9fef9SStefan Haberland private->count_area[0].dl) || 23633bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23643bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23653bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 23661da177e4SLinus Torvalds break; 23671da177e4SLinus Torvalds } 23681da177e4SLinus Torvalds if (i == 5) 23691da177e4SLinus Torvalds count_area = &private->count_area[0]; 23701da177e4SLinus Torvalds } else { 23711da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2372fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2373fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 23741da177e4SLinus Torvalds } 2375e4dbb0f2SStefan Haberland 23761da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 23771da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 23781da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 23798e09f215SStefan Weinhuber block->bp_block = count_area->dl; 23801da177e4SLinus Torvalds } 23818e09f215SStefan Weinhuber if (block->bp_block == 0) { 2382fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2383fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 23841da177e4SLinus Torvalds return -EMEDIUMTYPE; 23851da177e4SLinus Torvalds } 23868e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 23878e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 23888e09f215SStefan Weinhuber block->s2b_shift++; 23891da177e4SLinus Torvalds 23908e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2391e4dbb0f2SStefan Haberland 2392e4dbb0f2SStefan Haberland raw: 23932cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 23941da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23951da177e4SLinus Torvalds blk_per_trk); 23961da177e4SLinus Torvalds 2397fc19f381SStefan Haberland dev_info(&device->cdev->dev, 23982cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2399fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 24002cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 24011da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 24028e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 24038e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 24041da177e4SLinus Torvalds private->uses_cdl ? 24051da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 24061da177e4SLinus Torvalds 24071da177e4SLinus Torvalds return 0; 24081da177e4SLinus Torvalds } 24091da177e4SLinus Torvalds 24108e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 24111da177e4SLinus Torvalds { 2412543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24131da177e4SLinus Torvalds 24141da177e4SLinus Torvalds if (private->init_cqr_status < 0) 24158e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 24161da177e4SLinus Torvalds else 24178e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 24181da177e4SLinus Torvalds } 24191da177e4SLinus Torvalds 2420d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 24218e09f215SStefan Weinhuber { 24228e09f215SStefan Weinhuber return dasd_alias_add_device(device); 24238e09f215SStefan Weinhuber }; 24248e09f215SStefan Weinhuber 24258e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 24268e09f215SStefan Weinhuber { 2427669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2428669f3765SStefan Haberland dasd_put_device(device); 2429669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2430669f3765SStefan Haberland dasd_put_device(device); 2431669f3765SStefan Haberland 2432d42e1712SStefan Haberland return 0; 2433d42e1712SStefan Haberland }; 2434d42e1712SStefan Haberland 2435daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2436d42e1712SStefan Haberland { 24378e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 24388e09f215SStefan Weinhuber }; 24398e09f215SStefan Weinhuber 24401da177e4SLinus Torvalds static int 24418e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 24421da177e4SLinus Torvalds { 2443543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24441da177e4SLinus Torvalds 24458e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 24461da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 24478e09f215SStefan Weinhuber 0, block->bp_block); 24481da177e4SLinus Torvalds } 24491da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 24501da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 24511da177e4SLinus Torvalds return 0; 24521da177e4SLinus Torvalds } 24531da177e4SLinus Torvalds 24548fd57520SJan Höppner /* 24558fd57520SJan Höppner * Build the TCW request for the format check 24568fd57520SJan Höppner */ 24578fd57520SJan Höppner static struct dasd_ccw_req * 24588fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 24598fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 24608fd57520SJan Höppner int rpt) 24618fd57520SJan Höppner { 24628fd57520SJan Höppner struct dasd_eckd_private *start_priv; 24638fd57520SJan Höppner struct dasd_device *startdev = NULL; 24648fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 24658fd57520SJan Höppner struct dasd_ccw_req *cqr; 24668fd57520SJan Höppner struct itcw *itcw; 24678fd57520SJan Höppner int itcw_size; 24688fd57520SJan Höppner int count; 24698fd57520SJan Höppner int rc; 24708fd57520SJan Höppner int i; 24718fd57520SJan Höppner 24728fd57520SJan Höppner if (enable_pav) 24738fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 24748fd57520SJan Höppner 24758fd57520SJan Höppner if (!startdev) 24768fd57520SJan Höppner startdev = base; 24778fd57520SJan Höppner 24788fd57520SJan Höppner start_priv = startdev->private; 24798fd57520SJan Höppner 24808fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24818fd57520SJan Höppner 24828fd57520SJan Höppner /* 24838fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 24848fd57520SJan Höppner * calculate the corresponding itcw_size 24858fd57520SJan Höppner */ 24868fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 24878fd57520SJan Höppner 24885e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 24898fd57520SJan Höppner if (IS_ERR(cqr)) 24908fd57520SJan Höppner return cqr; 24918fd57520SJan Höppner 24928fd57520SJan Höppner start_priv->count++; 24938fd57520SJan Höppner 24948fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 24958fd57520SJan Höppner if (IS_ERR(itcw)) { 24968fd57520SJan Höppner rc = -EINVAL; 24978fd57520SJan Höppner goto out_err; 24988fd57520SJan Höppner } 24998fd57520SJan Höppner 25008fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 25018fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 25028fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 25038fd57520SJan Höppner sizeof(struct eckd_count), 25048fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 25058fd57520SJan Höppner if (rc) 25068fd57520SJan Höppner goto out_err; 25078fd57520SJan Höppner 25088fd57520SJan Höppner for (i = 0; i < count; i++) { 25098fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 25108fd57520SJan Höppner sizeof(struct eckd_count)); 25118fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 25128fd57520SJan Höppner rc = -EINVAL; 25138fd57520SJan Höppner goto out_err; 25148fd57520SJan Höppner } 25158fd57520SJan Höppner } 25168fd57520SJan Höppner 25178fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 25188fd57520SJan Höppner itcw_finalize(itcw); 25198fd57520SJan Höppner 25208fd57520SJan Höppner cqr->cpmode = 1; 25218fd57520SJan Höppner cqr->startdev = startdev; 25228fd57520SJan Höppner cqr->memdev = startdev; 25238fd57520SJan Höppner cqr->basedev = base; 25248fd57520SJan Höppner cqr->retries = startdev->default_retries; 25258fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 25268fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 25278fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 25288fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 25298fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 25308fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 25318fd57520SJan Höppner 25328fd57520SJan Höppner return cqr; 25338fd57520SJan Höppner 25348fd57520SJan Höppner out_err: 25358fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 25368fd57520SJan Höppner 25378fd57520SJan Höppner return ERR_PTR(rc); 25388fd57520SJan Höppner } 25398fd57520SJan Höppner 25408fd57520SJan Höppner /* 25418fd57520SJan Höppner * Build the CCW request for the format check 25428fd57520SJan Höppner */ 25438fd57520SJan Höppner static struct dasd_ccw_req * 25448fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 25458fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 25468fd57520SJan Höppner { 25478fd57520SJan Höppner struct dasd_eckd_private *start_priv; 25488fd57520SJan Höppner struct dasd_eckd_private *base_priv; 25498fd57520SJan Höppner struct dasd_device *startdev = NULL; 25508fd57520SJan Höppner struct dasd_ccw_req *cqr; 25518fd57520SJan Höppner struct ccw1 *ccw; 25528fd57520SJan Höppner void *data; 25538fd57520SJan Höppner int cplength, datasize; 25548fd57520SJan Höppner int use_prefix; 25558fd57520SJan Höppner int count; 25568fd57520SJan Höppner int i; 25578fd57520SJan Höppner 25588fd57520SJan Höppner if (enable_pav) 25598fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 25608fd57520SJan Höppner 25618fd57520SJan Höppner if (!startdev) 25628fd57520SJan Höppner startdev = base; 25638fd57520SJan Höppner 25648fd57520SJan Höppner start_priv = startdev->private; 25658fd57520SJan Höppner base_priv = base->private; 25668fd57520SJan Höppner 25678fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 25688fd57520SJan Höppner 25698fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 25708fd57520SJan Höppner 25718fd57520SJan Höppner if (use_prefix) { 25728fd57520SJan Höppner cplength = 1; 25738fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 25748fd57520SJan Höppner } else { 25758fd57520SJan Höppner cplength = 2; 25768fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 25778fd57520SJan Höppner sizeof(struct LO_eckd_data); 25788fd57520SJan Höppner } 25798fd57520SJan Höppner cplength += count; 25808fd57520SJan Höppner 25815e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 25828fd57520SJan Höppner if (IS_ERR(cqr)) 25838fd57520SJan Höppner return cqr; 25848fd57520SJan Höppner 25858fd57520SJan Höppner start_priv->count++; 25868fd57520SJan Höppner data = cqr->data; 25878fd57520SJan Höppner ccw = cqr->cpaddr; 25888fd57520SJan Höppner 25898fd57520SJan Höppner if (use_prefix) { 25908fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 25918fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 25928fd57520SJan Höppner count, 0, 0); 25938fd57520SJan Höppner } else { 25948fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 259545f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 25968fd57520SJan Höppner 25978fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 25988fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25998fd57520SJan Höppner 26008fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 26018fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 26028fd57520SJan Höppner } 26038fd57520SJan Höppner 26048fd57520SJan Höppner for (i = 0; i < count; i++) { 26058fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 26068fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 26078fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 26088fd57520SJan Höppner ccw->count = 8; 26098fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 26108fd57520SJan Höppner ccw++; 26118fd57520SJan Höppner fmt_buffer++; 26128fd57520SJan Höppner } 26138fd57520SJan Höppner 26148fd57520SJan Höppner cqr->startdev = startdev; 26158fd57520SJan Höppner cqr->memdev = startdev; 26168fd57520SJan Höppner cqr->basedev = base; 26178fd57520SJan Höppner cqr->retries = DASD_RETRIES; 26188fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 26198fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 26208fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 26218fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 26228fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 26238fd57520SJan Höppner 26248fd57520SJan Höppner return cqr; 26258fd57520SJan Höppner } 26268fd57520SJan Höppner 26271da177e4SLinus Torvalds static struct dasd_ccw_req * 26285e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 26295e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 26301da177e4SLinus Torvalds { 2631d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2632d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 26331da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 26341da177e4SLinus Torvalds struct eckd_count *ect; 2635d42e1712SStefan Haberland struct ch_t address; 26361da177e4SLinus Torvalds struct ccw1 *ccw; 26371da177e4SLinus Torvalds void *data; 2638b44b0ab3SStefan Weinhuber int rpt; 26391da177e4SLinus Torvalds int cplength, datasize; 2640d42e1712SStefan Haberland int i, j; 2641f9a28f7bSJean-Baptiste Joret int intensity = 0; 2642f9a28f7bSJean-Baptiste Joret int r0_perm; 2643d42e1712SStefan Haberland int nr_tracks; 264418d6624eSStefan Haberland int use_prefix; 26451da177e4SLinus Torvalds 2646a94fa154SStefan Haberland if (enable_pav) 2647d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 264829b8dd9dSStefan Haberland 2649d42e1712SStefan Haberland if (!startdev) 2650d42e1712SStefan Haberland startdev = base; 26511da177e4SLinus Torvalds 2652543691a4SSebastian Ott start_priv = startdev->private; 2653543691a4SSebastian Ott base_priv = base->private; 2654d42e1712SStefan Haberland 2655d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2656d42e1712SStefan Haberland 2657d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 26581da177e4SLinus Torvalds 26591da177e4SLinus Torvalds /* 26601da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 26611da177e4SLinus Torvalds * Bit 0: write record zero 26621da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 26631da177e4SLinus Torvalds * Bit 2: invalidate tracks 26641da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2665f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 26661da177e4SLinus Torvalds * Only some bit combinations do make sense. 26671da177e4SLinus Torvalds */ 2668f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2669f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2670f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2671f9a28f7bSJean-Baptiste Joret } else { 2672f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2673f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2674f9a28f7bSJean-Baptiste Joret } 2675d42e1712SStefan Haberland 267618d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 267718d6624eSStefan Haberland 2678f9a28f7bSJean-Baptiste Joret switch (intensity) { 26791da177e4SLinus Torvalds case 0x00: /* Normal format */ 26801da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2681d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 268218d6624eSStefan Haberland if (use_prefix) 2683d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26841da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2685d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 268618d6624eSStefan Haberland else 268718d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 268818d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 268918d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26901da177e4SLinus Torvalds break; 26911da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 26921da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2693d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 269418d6624eSStefan Haberland if (use_prefix) 2695d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26961da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26971da177e4SLinus Torvalds sizeof(struct eckd_count) + 2698d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 269918d6624eSStefan Haberland else 270018d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 270118d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 270218d6624eSStefan Haberland sizeof(struct eckd_count) + 270318d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 27041da177e4SLinus Torvalds break; 27051da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 27061da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 27071da177e4SLinus Torvalds cplength = 3; 270818d6624eSStefan Haberland if (use_prefix) 2709d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27101da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 27111da177e4SLinus Torvalds sizeof(struct eckd_count); 271218d6624eSStefan Haberland else 271318d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 271418d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 271518d6624eSStefan Haberland sizeof(struct eckd_count); 27161da177e4SLinus Torvalds break; 27171da177e4SLinus Torvalds default: 2718d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2719d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2720d42e1712SStefan Haberland fdata->intensity); 27211da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 27221da177e4SLinus Torvalds } 27235e2b17e7SJan Höppner 27245e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 27251da177e4SLinus Torvalds if (IS_ERR(fcp)) 27261da177e4SLinus Torvalds return fcp; 27271da177e4SLinus Torvalds 2728d42e1712SStefan Haberland start_priv->count++; 27291da177e4SLinus Torvalds data = fcp->data; 27301da177e4SLinus Torvalds ccw = fcp->cpaddr; 27311da177e4SLinus Torvalds 2732f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 27331da177e4SLinus Torvalds case 0x00: /* Normal format. */ 273418d6624eSStefan Haberland if (use_prefix) { 2735d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2736d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2737d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2738f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2739f9a28f7bSJean-Baptiste Joret if (r0_perm) 2740d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2741d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2742d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 274318d6624eSStefan Haberland } else { 274418d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 274518d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 274645f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 274718d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 274818d6624eSStefan Haberland if (r0_perm) 274918d6624eSStefan Haberland ((struct DE_eckd_data *) data) 275018d6624eSStefan Haberland ->ga_extended |= 0x04; 275118d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 275218d6624eSStefan Haberland } 27531da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27541da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2755d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2756d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 27571da177e4SLinus Torvalds fdata->blksize); 27581da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27591da177e4SLinus Torvalds break; 27601da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 276118d6624eSStefan Haberland if (use_prefix) { 2762d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2763d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 27641da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2765d42e1712SStefan Haberland base, startdev); 2766d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 276718d6624eSStefan Haberland } else { 276818d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 276918d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 277045f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 277118d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 277218d6624eSStefan Haberland } 27731da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27741da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2775d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2776d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2777d42e1712SStefan Haberland base->block->bp_block); 27781da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27791da177e4SLinus Torvalds break; 27801da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 278118d6624eSStefan Haberland if (use_prefix) { 2782d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2783d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2784d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2785d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 278618d6624eSStefan Haberland } else { 278718d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 278818d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 278945f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 279018d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 279118d6624eSStefan Haberland } 27921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27931da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 27941da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2795d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 27961da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27971da177e4SLinus Torvalds break; 27981da177e4SLinus Torvalds } 2799d42e1712SStefan Haberland 2800d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2801d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2802d42e1712SStefan Haberland set_ch_t(&address, 2803d42e1712SStefan Haberland (fdata->start_unit + j) / 2804d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2805d42e1712SStefan Haberland (fdata->start_unit + j) % 2806d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2807f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 28081da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28091da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2810b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2811b44b0ab3SStefan Weinhuber ect->head = address.head; 28121da177e4SLinus Torvalds ect->record = 0; 28131da177e4SLinus Torvalds ect->kl = 0; 28141da177e4SLinus Torvalds ect->dl = 8; 28151da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28161da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 28171da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28181da177e4SLinus Torvalds ccw->count = 8; 28191da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28201da177e4SLinus Torvalds ccw++; 28211da177e4SLinus Torvalds } 2822f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 28231da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28241da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2825b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2826b44b0ab3SStefan Weinhuber ect->head = address.head; 28271da177e4SLinus Torvalds ect->record = 1; 28281da177e4SLinus Torvalds ect->kl = 0; 28291da177e4SLinus Torvalds ect->dl = 0; 28301da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28311da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 28321da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28331da177e4SLinus Torvalds ccw->count = 8; 28341da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28351da177e4SLinus Torvalds } else { /* write remaining records */ 28361da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 28371da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28381da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2839b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2840b44b0ab3SStefan Weinhuber ect->head = address.head; 28411da177e4SLinus Torvalds ect->record = i + 1; 28421da177e4SLinus Torvalds ect->kl = 0; 28431da177e4SLinus Torvalds ect->dl = fdata->blksize; 2844d42e1712SStefan Haberland /* 2845d42e1712SStefan Haberland * Check for special tracks 0-1 2846d42e1712SStefan Haberland * when formatting CDL 2847d42e1712SStefan Haberland */ 2848f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 284946d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 28501da177e4SLinus Torvalds if (i < 3) { 28511da177e4SLinus Torvalds ect->kl = 4; 28521da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 28531da177e4SLinus Torvalds } 28541da177e4SLinus Torvalds } 2855f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 285646d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 28571da177e4SLinus Torvalds ect->kl = 44; 28581da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 28591da177e4SLinus Torvalds } 28601da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2861d42e1712SStefan Haberland if (i != 0 || j == 0) 2862d42e1712SStefan Haberland ccw->cmd_code = 2863d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2864d42e1712SStefan Haberland else 2865d42e1712SStefan Haberland ccw->cmd_code = 2866d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 28671da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28681da177e4SLinus Torvalds ccw->count = 8; 28691da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28701da177e4SLinus Torvalds ccw++; 28711da177e4SLinus Torvalds } 28721da177e4SLinus Torvalds } 2873d42e1712SStefan Haberland } 2874d42e1712SStefan Haberland 2875d42e1712SStefan Haberland fcp->startdev = startdev; 2876d42e1712SStefan Haberland fcp->memdev = startdev; 287729b8dd9dSStefan Haberland fcp->basedev = base; 2878eb6e199bSStefan Weinhuber fcp->retries = 256; 2879d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 28801aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 28811da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2882d42e1712SStefan Haberland 28831da177e4SLinus Torvalds return fcp; 28841da177e4SLinus Torvalds } 28851da177e4SLinus Torvalds 2886570d237cSJan Höppner /* 2887570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2888570d237cSJan Höppner */ 2889570d237cSJan Höppner static struct dasd_ccw_req * 2890570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 28918fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 28928fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2893d42e1712SStefan Haberland { 28948fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 28958fd57520SJan Höppner 28968fd57520SJan Höppner if (!fmt_buffer) { 28975e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 28988fd57520SJan Höppner } else { 28998fd57520SJan Höppner if (tpm) 29008fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 29018fd57520SJan Höppner enable_pav, 29028fd57520SJan Höppner fmt_buffer, rpt); 29038fd57520SJan Höppner else 29048fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 29058fd57520SJan Höppner fmt_buffer, rpt); 29068fd57520SJan Höppner } 29078fd57520SJan Höppner 29088fd57520SJan Höppner return ccw_req; 2909570d237cSJan Höppner } 2910570d237cSJan Höppner 2911570d237cSJan Höppner /* 2912570d237cSJan Höppner * Sanity checks on format_data 2913570d237cSJan Höppner */ 2914570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2915570d237cSJan Höppner struct format_data_t *fdata) 2916570d237cSJan Höppner { 2917543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2918d42e1712SStefan Haberland 2919d42e1712SStefan Haberland if (fdata->start_unit >= 2920d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2921d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2922d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2923d42e1712SStefan Haberland fdata->start_unit); 2924d42e1712SStefan Haberland return -EINVAL; 2925d42e1712SStefan Haberland } 2926d42e1712SStefan Haberland if (fdata->stop_unit >= 2927d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2928d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2929d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2930d42e1712SStefan Haberland fdata->stop_unit); 2931d42e1712SStefan Haberland return -EINVAL; 2932d42e1712SStefan Haberland } 2933d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2934d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2935d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2936d42e1712SStefan Haberland fdata->start_unit); 2937d42e1712SStefan Haberland return -EINVAL; 2938d42e1712SStefan Haberland } 2939d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2940d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2941d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2942d42e1712SStefan Haberland fdata->blksize); 2943d42e1712SStefan Haberland return -EINVAL; 2944d42e1712SStefan Haberland } 2945570d237cSJan Höppner return 0; 2946570d237cSJan Höppner } 2947570d237cSJan Höppner 2948570d237cSJan Höppner /* 2949570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2950570d237cSJan Höppner */ 2951570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2952570d237cSJan Höppner struct format_data_t *fdata, 29538fd57520SJan Höppner int enable_pav, int tpm, 29548fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 29558fd57520SJan Höppner struct irb *irb) 2956570d237cSJan Höppner { 2957543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2958570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2959570d237cSJan Höppner struct list_head format_queue; 2960570d237cSJan Höppner struct dasd_device *device; 29618fd57520SJan Höppner char *sense = NULL; 2962570d237cSJan Höppner int old_start, old_stop, format_step; 2963570d237cSJan Höppner int step, retry; 2964570d237cSJan Höppner int rc; 2965570d237cSJan Höppner 2966570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2967570d237cSJan Höppner if (rc) 2968570d237cSJan Höppner return rc; 2969d42e1712SStefan Haberland 2970d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2971d42e1712SStefan Haberland 297246d1c03cSJan Höppner old_start = fdata->start_unit; 297329b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2974d42e1712SStefan Haberland 29758fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 29768fd57520SJan Höppner /* Command Mode / Format Check */ 29778fd57520SJan Höppner format_step = 1; 29788fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 29798fd57520SJan Höppner /* Transport Mode / Format Check */ 29808fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 29818fd57520SJan Höppner } else { 29828fd57520SJan Höppner /* Normal Formatting */ 29838fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 29848fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 29858fd57520SJan Höppner } 29868fd57520SJan Höppner 298746d1c03cSJan Höppner do { 298846d1c03cSJan Höppner retry = 0; 2989d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2990d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 299146d1c03cSJan Höppner if (step > format_step) { 299246d1c03cSJan Höppner fdata->stop_unit = 299346d1c03cSJan Höppner fdata->start_unit + format_step - 1; 299446d1c03cSJan Höppner } 2995d42e1712SStefan Haberland 2996570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 29978fd57520SJan Höppner enable_pav, tpm, 29988fd57520SJan Höppner fmt_buffer, rpt); 2999d42e1712SStefan Haberland if (IS_ERR(cqr)) { 300046d1c03cSJan Höppner rc = PTR_ERR(cqr); 300146d1c03cSJan Höppner if (rc == -ENOMEM) { 300246d1c03cSJan Höppner if (list_empty(&format_queue)) 300346d1c03cSJan Höppner goto out; 3004d42e1712SStefan Haberland /* 300546d1c03cSJan Höppner * not enough memory available, start 300646d1c03cSJan Höppner * requests retry after first requests 300746d1c03cSJan Höppner * were finished 3008d42e1712SStefan Haberland */ 300946d1c03cSJan Höppner retry = 1; 301046d1c03cSJan Höppner break; 3011d42e1712SStefan Haberland } 301246d1c03cSJan Höppner goto out_err; 301346d1c03cSJan Höppner } 301446d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 3015d42e1712SStefan Haberland 30168fd57520SJan Höppner if (fmt_buffer) { 30178fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 30188fd57520SJan Höppner fmt_buffer += rpt * step; 30198fd57520SJan Höppner } 3020d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 3021d42e1712SStefan Haberland fdata->stop_unit = old_stop; 3022d42e1712SStefan Haberland } 3023d42e1712SStefan Haberland 302446d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 3025d42e1712SStefan Haberland 302646d1c03cSJan Höppner out_err: 3027d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 3028d42e1712SStefan Haberland device = cqr->startdev; 3029543691a4SSebastian Ott private = device->private; 30308fd57520SJan Höppner 30318fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 30328fd57520SJan Höppner /* 30338fd57520SJan Höppner * Only get sense data if called by format 30348fd57520SJan Höppner * check 30358fd57520SJan Höppner */ 30368fd57520SJan Höppner if (fmt_buffer && irb) { 30378fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 30388fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 30398fd57520SJan Höppner } 3040d42e1712SStefan Haberland rc = -EIO; 30418fd57520SJan Höppner } 3042d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 30435e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 3044d42e1712SStefan Haberland private->count--; 3045d42e1712SStefan Haberland } 3046d42e1712SStefan Haberland 30478fd57520SJan Höppner if (rc && rc != -EIO) 304846d1c03cSJan Höppner goto out; 30498fd57520SJan Höppner if (rc == -EIO) { 30508fd57520SJan Höppner /* 30518fd57520SJan Höppner * In case fewer than the expected records are on the 30528fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 30538fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 30548fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 30558fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 30568fd57520SJan Höppner * and continue. 30578fd57520SJan Höppner */ 30588fd57520SJan Höppner if (sense && 30598fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 30608fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 30618fd57520SJan Höppner retry = 1; 30628fd57520SJan Höppner else 30638fd57520SJan Höppner goto out; 30648fd57520SJan Höppner } 306529b8dd9dSStefan Haberland 306646d1c03cSJan Höppner } while (retry); 306746d1c03cSJan Höppner 306846d1c03cSJan Höppner out: 306946d1c03cSJan Höppner fdata->start_unit = old_start; 307046d1c03cSJan Höppner fdata->stop_unit = old_stop; 3071d42e1712SStefan Haberland 3072d42e1712SStefan Haberland return rc; 3073d42e1712SStefan Haberland } 3074d42e1712SStefan Haberland 3075570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 3076570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 3077570d237cSJan Höppner { 30788fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 30798fd57520SJan Höppner 0, NULL); 30808fd57520SJan Höppner } 30818fd57520SJan Höppner 30825e6bdd37SStefan Haberland static bool test_and_set_format_track(struct dasd_format_entry *to_format, 308371f38716SStefan Haberland struct dasd_ccw_req *cqr) 30845e6bdd37SStefan Haberland { 308571f38716SStefan Haberland struct dasd_block *block = cqr->block; 30865e6bdd37SStefan Haberland struct dasd_format_entry *format; 30875e6bdd37SStefan Haberland unsigned long flags; 30885e6bdd37SStefan Haberland bool rc = false; 30895e6bdd37SStefan Haberland 30905e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 309171f38716SStefan Haberland if (cqr->trkcount != atomic_read(&block->trkcount)) { 309271f38716SStefan Haberland /* 309371f38716SStefan Haberland * The number of formatted tracks has changed after request 309471f38716SStefan Haberland * start and we can not tell if the current track was involved. 309571f38716SStefan Haberland * To avoid data corruption treat it as if the current track is 309671f38716SStefan Haberland * involved 309771f38716SStefan Haberland */ 309871f38716SStefan Haberland rc = true; 309971f38716SStefan Haberland goto out; 310071f38716SStefan Haberland } 31015e6bdd37SStefan Haberland list_for_each_entry(format, &block->format_list, list) { 31025e6bdd37SStefan Haberland if (format->track == to_format->track) { 31035e6bdd37SStefan Haberland rc = true; 31045e6bdd37SStefan Haberland goto out; 31055e6bdd37SStefan Haberland } 31065e6bdd37SStefan Haberland } 31075e6bdd37SStefan Haberland list_add_tail(&to_format->list, &block->format_list); 31085e6bdd37SStefan Haberland 31095e6bdd37SStefan Haberland out: 31105e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 31115e6bdd37SStefan Haberland return rc; 31125e6bdd37SStefan Haberland } 31135e6bdd37SStefan Haberland 31145e6bdd37SStefan Haberland static void clear_format_track(struct dasd_format_entry *format, 31155e6bdd37SStefan Haberland struct dasd_block *block) 31165e6bdd37SStefan Haberland { 31175e6bdd37SStefan Haberland unsigned long flags; 31185e6bdd37SStefan Haberland 31195e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 312071f38716SStefan Haberland atomic_inc(&block->trkcount); 31215e6bdd37SStefan Haberland list_del_init(&format->list); 31225e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 31235e6bdd37SStefan Haberland } 31245e6bdd37SStefan Haberland 31258fd57520SJan Höppner /* 31265e2b17e7SJan Höppner * Callback function to free ESE format requests. 31275e2b17e7SJan Höppner */ 31285e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 31295e2b17e7SJan Höppner { 31305e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 31315e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 31325e6bdd37SStefan Haberland struct dasd_format_entry *format = data; 31335e2b17e7SJan Höppner 31345e6bdd37SStefan Haberland clear_format_track(format, cqr->basedev->block); 31355e2b17e7SJan Höppner private->count--; 31365e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 31375e2b17e7SJan Höppner } 31385e2b17e7SJan Höppner 31395e2b17e7SJan Höppner static struct dasd_ccw_req * 31405e6bdd37SStefan Haberland dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 31415e6bdd37SStefan Haberland struct irb *irb) 31425e2b17e7SJan Höppner { 31435e2b17e7SJan Höppner struct dasd_eckd_private *private; 31445e6bdd37SStefan Haberland struct dasd_format_entry *format; 31455e2b17e7SJan Höppner struct format_data_t fdata; 31465e2b17e7SJan Höppner unsigned int recs_per_trk; 31475e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 31485e2b17e7SJan Höppner struct dasd_device *base; 31495e2b17e7SJan Höppner struct dasd_block *block; 31505e2b17e7SJan Höppner unsigned int blksize; 31515e2b17e7SJan Höppner struct request *req; 31525e2b17e7SJan Höppner sector_t first_trk; 31535e2b17e7SJan Höppner sector_t last_trk; 31545e6bdd37SStefan Haberland sector_t curr_trk; 31555e2b17e7SJan Höppner int rc; 31565e2b17e7SJan Höppner 31575b53a405SStefan Haberland req = dasd_get_callback_data(cqr); 31585e6bdd37SStefan Haberland block = cqr->block; 31595e6bdd37SStefan Haberland base = block->base; 31605e2b17e7SJan Höppner private = base->private; 31615e2b17e7SJan Höppner blksize = block->bp_block; 31625e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 31635e6bdd37SStefan Haberland format = &startdev->format_entry; 31645e2b17e7SJan Höppner 31655e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 31665e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 31675e2b17e7SJan Höppner last_trk = 31685e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 31695e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 31705e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 31715e6bdd37SStefan Haberland if (rc) 31725e6bdd37SStefan Haberland return ERR_PTR(rc); 31735e2b17e7SJan Höppner 31745e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 31755e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, startdev, 31765e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 31775e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 31785e6bdd37SStefan Haberland return ERR_PTR(-EINVAL); 31795e6bdd37SStefan Haberland } 31805e6bdd37SStefan Haberland format->track = curr_trk; 31815e6bdd37SStefan Haberland /* test if track is already in formatting by another thread */ 318271f38716SStefan Haberland if (test_and_set_format_track(format, cqr)) { 318371f38716SStefan Haberland /* this is no real error so do not count down retries */ 318471f38716SStefan Haberland cqr->retries++; 31855e6bdd37SStefan Haberland return ERR_PTR(-EEXIST); 318671f38716SStefan Haberland } 31875e6bdd37SStefan Haberland 31885e6bdd37SStefan Haberland fdata.start_unit = curr_trk; 31895e6bdd37SStefan Haberland fdata.stop_unit = curr_trk; 31905e2b17e7SJan Höppner fdata.blksize = blksize; 31915e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 31925e2b17e7SJan Höppner 31935e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 31945e2b17e7SJan Höppner if (rc) 31955e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 31965e2b17e7SJan Höppner 31975e2b17e7SJan Höppner /* 31985e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 31995e2b17e7SJan Höppner * the former startdev. 32005e2b17e7SJan Höppner */ 32015e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 32025e2b17e7SJan Höppner if (IS_ERR(fcqr)) 32035e2b17e7SJan Höppner return fcqr; 32045e2b17e7SJan Höppner 32055e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 32065e6bdd37SStefan Haberland fcqr->callback_data = (void *) format; 32075e2b17e7SJan Höppner 32085e2b17e7SJan Höppner return fcqr; 32095e2b17e7SJan Höppner } 32105e2b17e7SJan Höppner 32115e2b17e7SJan Höppner /* 32125e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 32135e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 32145e6bdd37SStefan Haberland * 32155e6bdd37SStefan Haberland * The first unformatted track is the one that got the NRF error, the address is 32165e6bdd37SStefan Haberland * encoded in the sense data. 32175e6bdd37SStefan Haberland * 32185e6bdd37SStefan Haberland * All tracks before have returned valid data and should not be touched. 32195e6bdd37SStefan Haberland * All tracks after the unformatted track might be formatted or not. This is 32205e6bdd37SStefan Haberland * currently not known, remember the processed data and return the remainder of 32215e6bdd37SStefan Haberland * the request to the blocklayer in __dasd_cleanup_cqr(). 32225e2b17e7SJan Höppner */ 32235e6bdd37SStefan Haberland static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 32245e2b17e7SJan Höppner { 32255e6bdd37SStefan Haberland struct dasd_eckd_private *private; 32265e6bdd37SStefan Haberland sector_t first_trk, last_trk; 32275e6bdd37SStefan Haberland sector_t first_blk, last_blk; 32285e2b17e7SJan Höppner unsigned int blksize, off; 32295e6bdd37SStefan Haberland unsigned int recs_per_trk; 32305e2b17e7SJan Höppner struct dasd_device *base; 32315e2b17e7SJan Höppner struct req_iterator iter; 32325e6bdd37SStefan Haberland struct dasd_block *block; 32335e6bdd37SStefan Haberland unsigned int skip_block; 32345e6bdd37SStefan Haberland unsigned int blk_count; 32355e2b17e7SJan Höppner struct request *req; 32365e2b17e7SJan Höppner struct bio_vec bv; 32375e6bdd37SStefan Haberland sector_t curr_trk; 32385e6bdd37SStefan Haberland sector_t end_blk; 32395e2b17e7SJan Höppner char *dst; 32405e6bdd37SStefan Haberland int rc; 32415e2b17e7SJan Höppner 32425e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 32435e2b17e7SJan Höppner base = cqr->block->base; 32445e2b17e7SJan Höppner blksize = base->block->bp_block; 32455e6bdd37SStefan Haberland block = cqr->block; 32465e6bdd37SStefan Haberland private = base->private; 32475e6bdd37SStefan Haberland skip_block = 0; 32485e6bdd37SStefan Haberland blk_count = 0; 32495e6bdd37SStefan Haberland 32505e6bdd37SStefan Haberland recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32515e6bdd37SStefan Haberland first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 32525e6bdd37SStefan Haberland sector_div(first_trk, recs_per_trk); 32535e6bdd37SStefan Haberland last_trk = last_blk = 32545e6bdd37SStefan Haberland (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 32555e6bdd37SStefan Haberland sector_div(last_trk, recs_per_trk); 32565e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 32575e6bdd37SStefan Haberland if (rc) 32585e6bdd37SStefan Haberland return rc; 32595e6bdd37SStefan Haberland 32605e6bdd37SStefan Haberland /* sanity check if the current track from sense data is valid */ 32615e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 32625e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, base, 32635e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 32645e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 32655e6bdd37SStefan Haberland return -EINVAL; 32665e6bdd37SStefan Haberland } 32675e6bdd37SStefan Haberland 32685e6bdd37SStefan Haberland /* 32695e6bdd37SStefan Haberland * if not the first track got the NRF error we have to skip over valid 32705e6bdd37SStefan Haberland * blocks 32715e6bdd37SStefan Haberland */ 32725e6bdd37SStefan Haberland if (curr_trk != first_trk) 32735e6bdd37SStefan Haberland skip_block = curr_trk * recs_per_trk - first_blk; 32745e6bdd37SStefan Haberland 32755e6bdd37SStefan Haberland /* we have no information beyond the current track */ 32765e6bdd37SStefan Haberland end_blk = (curr_trk + 1) * recs_per_trk; 32775e2b17e7SJan Höppner 32785e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 3279bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 32805e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 32815e6bdd37SStefan Haberland if (first_blk + blk_count >= end_blk) { 32825e6bdd37SStefan Haberland cqr->proc_bytes = blk_count * blksize; 32835e6bdd37SStefan Haberland return 0; 32845e6bdd37SStefan Haberland } 3285cd68c48eSJan Höppner if (dst && !skip_block) 32865e2b17e7SJan Höppner memset(dst, 0, blksize); 3287cd68c48eSJan Höppner else 32885e6bdd37SStefan Haberland skip_block--; 3289cd68c48eSJan Höppner dst += blksize; 32905e6bdd37SStefan Haberland blk_count++; 32915e2b17e7SJan Höppner } 32925e2b17e7SJan Höppner } 32935e6bdd37SStefan Haberland return 0; 32945e2b17e7SJan Höppner } 32955e2b17e7SJan Höppner 32965e2b17e7SJan Höppner /* 32978fd57520SJan Höppner * Helper function to count consecutive records of a single track. 32988fd57520SJan Höppner */ 32998fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 33008fd57520SJan Höppner int max) 33018fd57520SJan Höppner { 33028fd57520SJan Höppner int head; 33038fd57520SJan Höppner int i; 33048fd57520SJan Höppner 33058fd57520SJan Höppner head = fmt_buffer[start].head; 33068fd57520SJan Höppner 33078fd57520SJan Höppner /* 33088fd57520SJan Höppner * There are 3 conditions where we stop counting: 33098fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 33108fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 33118fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 33128fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 33138fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 33148fd57520SJan Höppner * record will be 0 then) 33158fd57520SJan Höppner */ 33168fd57520SJan Höppner for (i = start; i < max; i++) { 33178fd57520SJan Höppner if (i > start) { 33188fd57520SJan Höppner if ((fmt_buffer[i].head == head && 33198fd57520SJan Höppner fmt_buffer[i].record == 1) || 33208fd57520SJan Höppner fmt_buffer[i].head != head || 33218fd57520SJan Höppner fmt_buffer[i].record == 0) 33228fd57520SJan Höppner break; 33238fd57520SJan Höppner } 33248fd57520SJan Höppner } 33258fd57520SJan Höppner 33268fd57520SJan Höppner return i - start; 33278fd57520SJan Höppner } 33288fd57520SJan Höppner 33298fd57520SJan Höppner /* 33308fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 33318fd57520SJan Höppner * record ids, and key length are compared with expected data. 33328fd57520SJan Höppner * 33338fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 33348fd57520SJan Höppner * additional information, depending on the error. 33358fd57520SJan Höppner */ 33368fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 33378fd57520SJan Höppner struct format_check_t *cdata, 33388fd57520SJan Höppner int rpt_max, int rpt_exp, 33398fd57520SJan Höppner int trk_per_cyl, int tpm) 33408fd57520SJan Höppner { 33418fd57520SJan Höppner struct ch_t geo; 33428fd57520SJan Höppner int max_entries; 33438fd57520SJan Höppner int count = 0; 33448fd57520SJan Höppner int trkcount; 33458fd57520SJan Höppner int blksize; 33468fd57520SJan Höppner int pos = 0; 33478fd57520SJan Höppner int i, j; 33488fd57520SJan Höppner int kl; 33498fd57520SJan Höppner 33508fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 33518fd57520SJan Höppner max_entries = trkcount * rpt_max; 33528fd57520SJan Höppner 33538fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 33548fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 33558fd57520SJan Höppner if (tpm) { 33568fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 33578fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 33588fd57520SJan Höppner if (pos++ > max_entries) 33598fd57520SJan Höppner break; 33608fd57520SJan Höppner } 33618fd57520SJan Höppner } else { 33628fd57520SJan Höppner if (i != cdata->expect.start_unit) 33638fd57520SJan Höppner pos += rpt_max - count; 33648fd57520SJan Höppner } 33658fd57520SJan Höppner 33668fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 33678fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 33688fd57520SJan Höppner 33698fd57520SJan Höppner /* Count and check number of records */ 33708fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 33718fd57520SJan Höppner 33728fd57520SJan Höppner if (count < rpt_exp) { 33738fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 33748fd57520SJan Höppner break; 33758fd57520SJan Höppner } 33768fd57520SJan Höppner if (count > rpt_exp) { 33778fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 33788fd57520SJan Höppner break; 33798fd57520SJan Höppner } 33808fd57520SJan Höppner 33818fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 33828fd57520SJan Höppner blksize = cdata->expect.blksize; 33838fd57520SJan Höppner kl = 0; 33848fd57520SJan Höppner 33858fd57520SJan Höppner /* 33868fd57520SJan Höppner * Set special values when checking CDL formatted 33878fd57520SJan Höppner * devices. 33888fd57520SJan Höppner */ 33898fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 33908fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 33918fd57520SJan Höppner if (j < 3) { 33928fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 33938fd57520SJan Höppner kl = 4; 33948fd57520SJan Höppner } 33958fd57520SJan Höppner } 33968fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 33978fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 33988fd57520SJan Höppner blksize = LABEL_SIZE - 44; 33998fd57520SJan Höppner kl = 44; 34008fd57520SJan Höppner } 34018fd57520SJan Höppner 34028fd57520SJan Höppner /* Check blocksize */ 34038fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 34048fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 34058fd57520SJan Höppner goto out; 34068fd57520SJan Höppner } 34078fd57520SJan Höppner /* Check if key length is 0 */ 34088fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 34098fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 34108fd57520SJan Höppner goto out; 34118fd57520SJan Höppner } 34128fd57520SJan Höppner /* Check if record_id is correct */ 34138fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 34148fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 34158fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 34168fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 34178fd57520SJan Höppner goto out; 34188fd57520SJan Höppner } 34198fd57520SJan Höppner } 34208fd57520SJan Höppner } 34218fd57520SJan Höppner 34228fd57520SJan Höppner out: 34238fd57520SJan Höppner /* 34248fd57520SJan Höppner * In case of no errors, we need to decrease by one 34258fd57520SJan Höppner * to get the correct positions. 34268fd57520SJan Höppner */ 34278fd57520SJan Höppner if (!cdata->result) { 34288fd57520SJan Höppner i--; 34298fd57520SJan Höppner pos--; 34308fd57520SJan Höppner } 34318fd57520SJan Höppner 34328fd57520SJan Höppner cdata->unit = i; 34338fd57520SJan Höppner cdata->num_records = count; 34348fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 34358fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 34368fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 34378fd57520SJan Höppner } 34388fd57520SJan Höppner 34398fd57520SJan Höppner /* 34408fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 34418fd57520SJan Höppner */ 34428fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 34438fd57520SJan Höppner struct format_check_t *cdata, 34448fd57520SJan Höppner int enable_pav) 34458fd57520SJan Höppner { 34468fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 34478fd57520SJan Höppner struct eckd_count *fmt_buffer; 34488fd57520SJan Höppner struct irb irb; 34498fd57520SJan Höppner int rpt_max, rpt_exp; 34508fd57520SJan Höppner int fmt_buffer_size; 34518fd57520SJan Höppner int trk_per_cyl; 34528fd57520SJan Höppner int trkcount; 34538fd57520SJan Höppner int tpm = 0; 34548fd57520SJan Höppner int rc; 34558fd57520SJan Höppner 34568fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 34578fd57520SJan Höppner 34588fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 34598fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 34608fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 34618fd57520SJan Höppner 34628fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 34638fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 34648fd57520SJan Höppner 34658fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 34668fd57520SJan Höppner if (!fmt_buffer) 34678fd57520SJan Höppner return -ENOMEM; 34688fd57520SJan Höppner 34698fd57520SJan Höppner /* 34708fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 34718fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 34728fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 34738fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 34748fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 34758fd57520SJan Höppner * processed using command mode. 34768fd57520SJan Höppner */ 34778fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 34788fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 34798fd57520SJan Höppner tpm = 1; 34808fd57520SJan Höppner 34818fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 34828fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 34838fd57520SJan Höppner if (rc && rc != -EIO) 34848fd57520SJan Höppner goto out; 34858fd57520SJan Höppner if (rc == -EIO) { 34868fd57520SJan Höppner /* 34878fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 34888fd57520SJan Höppner * with an incorrect length error, we're going to retry the 34898fd57520SJan Höppner * check with command mode. 34908fd57520SJan Höppner */ 34918fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 34928fd57520SJan Höppner tpm = 0; 34938fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 34948fd57520SJan Höppner enable_pav, tpm, 34958fd57520SJan Höppner fmt_buffer, rpt_max, 34968fd57520SJan Höppner &irb); 34978fd57520SJan Höppner if (rc) 34988fd57520SJan Höppner goto out; 34998fd57520SJan Höppner } else { 35008fd57520SJan Höppner goto out; 35018fd57520SJan Höppner } 35028fd57520SJan Höppner } 35038fd57520SJan Höppner 35048fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 35058fd57520SJan Höppner trk_per_cyl, tpm); 35068fd57520SJan Höppner 35078fd57520SJan Höppner out: 35088fd57520SJan Höppner kfree(fmt_buffer); 35098fd57520SJan Höppner 35108fd57520SJan Höppner return rc; 3511570d237cSJan Höppner } 3512570d237cSJan Höppner 35138e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 35141da177e4SLinus Torvalds { 3515a2ace466SHannes Reinecke if (cqr->retries < 0) { 3516a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3517a2ace466SHannes Reinecke return; 3518a2ace466SHannes Reinecke } 35198e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 35208e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 35218e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 35228e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3523c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 35241da177e4SLinus Torvalds } 35258e09f215SStefan Weinhuber }; 35261da177e4SLinus Torvalds 35271da177e4SLinus Torvalds static dasd_erp_fn_t 35281da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 35291da177e4SLinus Torvalds { 35308e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 35311da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 35321da177e4SLinus Torvalds 35331da177e4SLinus Torvalds switch (cdev->id.cu_type) { 35341da177e4SLinus Torvalds case 0x3990: 35351da177e4SLinus Torvalds case 0x2105: 35361da177e4SLinus Torvalds case 0x2107: 35371da177e4SLinus Torvalds case 0x1750: 35381da177e4SLinus Torvalds return dasd_3990_erp_action; 35391da177e4SLinus Torvalds case 0x9343: 35401da177e4SLinus Torvalds case 0x3880: 35411da177e4SLinus Torvalds default: 35421da177e4SLinus Torvalds return dasd_default_erp_action; 35431da177e4SLinus Torvalds } 35441da177e4SLinus Torvalds } 35451da177e4SLinus Torvalds 35461da177e4SLinus Torvalds static dasd_erp_fn_t 35471da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 35481da177e4SLinus Torvalds { 35491da177e4SLinus Torvalds return dasd_default_erp_postaction; 35501da177e4SLinus Torvalds } 35511da177e4SLinus Torvalds 35525a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 35535a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 35548e09f215SStefan Weinhuber struct irb *irb) 35558e09f215SStefan Weinhuber { 35568e09f215SStefan Weinhuber char mask; 3557f3eb5384SStefan Weinhuber char *sense = NULL; 3558543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 35598e09f215SStefan Weinhuber 35608e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 35618e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3562f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3563c8d1c0ffSStefan Haberland /* 3564c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3565c8d1c0ffSStefan Haberland * and only if not suspended 3566c8d1c0ffSStefan Haberland */ 3567501183f2SStefan Haberland if (!device->block && private->lcu && 356825e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3569c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3570c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3571501183f2SStefan Haberland /* schedule worker to reload device */ 3572501183f2SStefan Haberland dasd_reload_device(device); 3573501183f2SStefan Haberland } 35748e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 35758e09f215SStefan Weinhuber return; 35768e09f215SStefan Weinhuber } 35778e09f215SStefan Weinhuber 3578a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 35795a27e60dSStefan Weinhuber if (!sense) 35805a27e60dSStefan Weinhuber return; 35815a27e60dSStefan Weinhuber 35825a27e60dSStefan Weinhuber /* summary unit check */ 3583c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3584a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 358559a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 358659a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 358759a9ed5fSStefan Haberland "eckd suc: device already notified"); 358859a9ed5fSStefan Haberland return; 358959a9ed5fSStefan Haberland } 359059a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 359159a9ed5fSStefan Haberland if (!sense) { 359259a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 359359a9ed5fSStefan Haberland "eckd suc: no reason code available"); 359459a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 359559a9ed5fSStefan Haberland return; 359659a9ed5fSStefan Haberland 359759a9ed5fSStefan Haberland } 359859a9ed5fSStefan Haberland private->suc_reason = sense[8]; 359959a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 360059a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 360159a9ed5fSStefan Haberland private->suc_reason); 360259a9ed5fSStefan Haberland dasd_get_device(device); 360359a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 360459a9ed5fSStefan Haberland dasd_put_device(device); 360559a9ed5fSStefan Haberland 36068e09f215SStefan Weinhuber return; 36078e09f215SStefan Weinhuber } 36088e09f215SStefan Weinhuber 3609f60c768cSStefan Haberland /* service information message SIM */ 36105a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3611f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3612f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3613f60c768cSStefan Haberland return; 3614f60c768cSStefan Haberland } 3615f60c768cSStefan Haberland 36165a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 36175a27e60dSStefan Weinhuber * as alias devices may be used with several bases 36185a27e60dSStefan Weinhuber */ 3619c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3620c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 36215a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 36225a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 36235a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 36245a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 36255a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36265a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 36275a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3628ada3df91SStefan Haberland } 36295a27e60dSStefan Weinhuber } 3630f3eb5384SStefan Weinhuber 363191dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 363291dc4a19SJan Höppner unsigned int first_trk, 363391dc4a19SJan Höppner unsigned int last_trk) 363491dc4a19SJan Höppner { 363591dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 363691dc4a19SJan Höppner unsigned int trks_per_vol; 363791dc4a19SJan Höppner int rc = 0; 363891dc4a19SJan Höppner 363991dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 364091dc4a19SJan Höppner 364191dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 364291dc4a19SJan Höppner dev_warn(&device->cdev->dev, 364391dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 364491dc4a19SJan Höppner first_trk); 364591dc4a19SJan Höppner rc = -EINVAL; 364691dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 364791dc4a19SJan Höppner dev_warn(&device->cdev->dev, 364891dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 364991dc4a19SJan Höppner last_trk); 365091dc4a19SJan Höppner rc = -EINVAL; 365191dc4a19SJan Höppner } else if (first_trk > last_trk) { 365291dc4a19SJan Höppner dev_warn(&device->cdev->dev, 365391dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 365491dc4a19SJan Höppner first_trk); 365591dc4a19SJan Höppner rc = -EINVAL; 365691dc4a19SJan Höppner } 365791dc4a19SJan Höppner return rc; 365891dc4a19SJan Höppner } 365991dc4a19SJan Höppner 366091dc4a19SJan Höppner /* 366191dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 366291dc4a19SJan Höppner * with extent alignment in mind. 366391dc4a19SJan Höppner */ 366491dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 366591dc4a19SJan Höppner { 366691dc4a19SJan Höppner int cur_pos = 0; 366791dc4a19SJan Höppner int count = 0; 366891dc4a19SJan Höppner int tmp; 366991dc4a19SJan Höppner 367091dc4a19SJan Höppner if (from == to) 367191dc4a19SJan Höppner return 1; 367291dc4a19SJan Höppner 367391dc4a19SJan Höppner /* Count first partial extent */ 367491dc4a19SJan Höppner if (from % trks_per_ext != 0) { 367591dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 367691dc4a19SJan Höppner if (tmp > to) 367791dc4a19SJan Höppner tmp = to; 367891dc4a19SJan Höppner cur_pos = tmp - from + 1; 367991dc4a19SJan Höppner count++; 368091dc4a19SJan Höppner } 368191dc4a19SJan Höppner /* Count full extents */ 368291dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 368391dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 368491dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 368591dc4a19SJan Höppner cur_pos = tmp; 368691dc4a19SJan Höppner } 368791dc4a19SJan Höppner /* Count last partial extent */ 368891dc4a19SJan Höppner if (cur_pos < to) 368991dc4a19SJan Höppner count++; 369091dc4a19SJan Höppner 369191dc4a19SJan Höppner return count; 369291dc4a19SJan Höppner } 369391dc4a19SJan Höppner 369491dc4a19SJan Höppner /* 369591dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 369691dc4a19SJan Höppner */ 369791dc4a19SJan Höppner static struct dasd_ccw_req * 369891dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 369991dc4a19SJan Höppner struct request *req, unsigned int first_trk, 370091dc4a19SJan Höppner unsigned int last_trk, int by_extent) 370191dc4a19SJan Höppner { 370291dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 370391dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 370491dc4a19SJan Höppner struct dasd_rssd_features *features; 370591dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 370691dc4a19SJan Höppner u16 heads, beg_head, end_head; 370791dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 370891dc4a19SJan Höppner struct dasd_ccw_req *cqr; 370991dc4a19SJan Höppner u32 beg_cyl, end_cyl; 371091dc4a19SJan Höppner struct ccw1 *ccw; 371191dc4a19SJan Höppner int trks_per_ext; 371291dc4a19SJan Höppner size_t ras_size; 371391dc4a19SJan Höppner size_t size; 371491dc4a19SJan Höppner int nr_exts; 371591dc4a19SJan Höppner void *rq; 371691dc4a19SJan Höppner int i; 371791dc4a19SJan Höppner 371891dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 371991dc4a19SJan Höppner return ERR_PTR(-EINVAL); 372091dc4a19SJan Höppner 372191dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 372291dc4a19SJan Höppner 372391dc4a19SJan Höppner features = &private->features; 372491dc4a19SJan Höppner 372591dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 372691dc4a19SJan Höppner nr_exts = 0; 372791dc4a19SJan Höppner if (by_extent) 372891dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 372991dc4a19SJan Höppner ras_size = sizeof(*ras_data); 373091dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 373191dc4a19SJan Höppner 373291dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 373391dc4a19SJan Höppner if (IS_ERR(cqr)) { 373491dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 373591dc4a19SJan Höppner "Could not allocate RAS request"); 373691dc4a19SJan Höppner return cqr; 373791dc4a19SJan Höppner } 373891dc4a19SJan Höppner 373991dc4a19SJan Höppner ras_data = cqr->data; 374091dc4a19SJan Höppner memset(ras_data, 0, size); 374191dc4a19SJan Höppner 374291dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 374391dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 374491dc4a19SJan Höppner /* Release specified extents or entire volume */ 374591dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 374691dc4a19SJan Höppner /* 374791dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 374891dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 374991dc4a19SJan Höppner * subset. 375091dc4a19SJan Höppner */ 375191dc4a19SJan Höppner ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 3752542e30ceSStefan Haberland ras_data->lss = private->conf.ned->ID; 3753542e30ceSStefan Haberland ras_data->dev_addr = private->conf.ned->unit_addr; 375491dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 375591dc4a19SJan Höppner 375691dc4a19SJan Höppner if (by_extent) { 375791dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 375891dc4a19SJan Höppner cur_from_trk = first_trk; 375991dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 376091dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 376191dc4a19SJan Höppner if (cur_to_trk > last_trk) 376291dc4a19SJan Höppner cur_to_trk = last_trk; 376391dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 376491dc4a19SJan Höppner 376591dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 376691dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 376791dc4a19SJan Höppner beg_head = cur_from_trk % heads; 376891dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 376991dc4a19SJan Höppner end_head = cur_to_trk % heads; 377091dc4a19SJan Höppner 377191dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 377291dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 377391dc4a19SJan Höppner 377491dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 377591dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 377691dc4a19SJan Höppner if (cur_to_trk > last_trk) 377791dc4a19SJan Höppner cur_to_trk = last_trk; 377891dc4a19SJan Höppner ras_range++; 377991dc4a19SJan Höppner } 378091dc4a19SJan Höppner } 378191dc4a19SJan Höppner 378291dc4a19SJan Höppner ccw = cqr->cpaddr; 378391dc4a19SJan Höppner ccw->cda = (__u32)(addr_t)cqr->data; 378491dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 378591dc4a19SJan Höppner ccw->count = size; 378691dc4a19SJan Höppner 378791dc4a19SJan Höppner cqr->startdev = device; 378891dc4a19SJan Höppner cqr->memdev = device; 378991dc4a19SJan Höppner cqr->block = block; 379091dc4a19SJan Höppner cqr->retries = 256; 379191dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 379291dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 379391dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 379491dc4a19SJan Höppner 379591dc4a19SJan Höppner return cqr; 379691dc4a19SJan Höppner } 379791dc4a19SJan Höppner 379891dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 379991dc4a19SJan Höppner { 380091dc4a19SJan Höppner struct dasd_ccw_req *cqr; 380191dc4a19SJan Höppner int rc; 380291dc4a19SJan Höppner 380391dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 380491dc4a19SJan Höppner if (IS_ERR(cqr)) 380591dc4a19SJan Höppner return PTR_ERR(cqr); 380691dc4a19SJan Höppner 380791dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 380891dc4a19SJan Höppner 380991dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 381091dc4a19SJan Höppner 381191dc4a19SJan Höppner return rc; 381291dc4a19SJan Höppner } 381391dc4a19SJan Höppner 381491dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 381591dc4a19SJan Höppner unsigned int from, unsigned int to) 381691dc4a19SJan Höppner { 381791dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 381891dc4a19SJan Höppner struct dasd_block *block = device->block; 381991dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 382091dc4a19SJan Höppner struct list_head ras_queue; 382191dc4a19SJan Höppner unsigned int device_exts; 382291dc4a19SJan Höppner int trks_per_ext; 382391dc4a19SJan Höppner int stop, step; 382491dc4a19SJan Höppner int cur_pos; 382591dc4a19SJan Höppner int rc = 0; 382691dc4a19SJan Höppner int retry; 382791dc4a19SJan Höppner 382891dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 382991dc4a19SJan Höppner 383091dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 383191dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 383291dc4a19SJan Höppner 383391dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 383491dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 383591dc4a19SJan Höppner cur_pos = from; 383691dc4a19SJan Höppner 383791dc4a19SJan Höppner do { 383891dc4a19SJan Höppner retry = 0; 383991dc4a19SJan Höppner while (cur_pos < to) { 384091dc4a19SJan Höppner stop = cur_pos + step - 384191dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 384291dc4a19SJan Höppner if (stop > to) 384391dc4a19SJan Höppner stop = to; 384491dc4a19SJan Höppner 384591dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 384691dc4a19SJan Höppner if (IS_ERR(cqr)) { 384791dc4a19SJan Höppner rc = PTR_ERR(cqr); 384891dc4a19SJan Höppner if (rc == -ENOMEM) { 384991dc4a19SJan Höppner if (list_empty(&ras_queue)) 385091dc4a19SJan Höppner goto out; 385191dc4a19SJan Höppner retry = 1; 385291dc4a19SJan Höppner break; 385391dc4a19SJan Höppner } 385491dc4a19SJan Höppner goto err_out; 385591dc4a19SJan Höppner } 385691dc4a19SJan Höppner 385791dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 385891dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 385991dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 386091dc4a19SJan Höppner cur_pos = stop + 1; 386191dc4a19SJan Höppner } 386291dc4a19SJan Höppner 386391dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 386491dc4a19SJan Höppner 386591dc4a19SJan Höppner err_out: 386691dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 386791dc4a19SJan Höppner device = cqr->startdev; 386891dc4a19SJan Höppner private = device->private; 386991dc4a19SJan Höppner 387091dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 387191dc4a19SJan Höppner list_del_init(&cqr->blocklist); 387291dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 387391dc4a19SJan Höppner dasd_sfree_request(cqr, device); 387491dc4a19SJan Höppner private->count--; 387591dc4a19SJan Höppner } 387691dc4a19SJan Höppner } while (retry); 387791dc4a19SJan Höppner 387891dc4a19SJan Höppner out: 387991dc4a19SJan Höppner return rc; 388091dc4a19SJan Höppner } 388191dc4a19SJan Höppner 388291dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 388391dc4a19SJan Höppner struct format_data_t *rdata) 388491dc4a19SJan Höppner { 388591dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 388691dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 388791dc4a19SJan Höppner else if (rdata->intensity == 0) 388891dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 388991dc4a19SJan Höppner rdata->stop_unit); 389091dc4a19SJan Höppner else 389191dc4a19SJan Höppner return -EINVAL; 389291dc4a19SJan Höppner } 389391dc4a19SJan Höppner 3894f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3895f3eb5384SStefan Weinhuber struct dasd_device *startdev, 38968e09f215SStefan Weinhuber struct dasd_block *block, 3897f3eb5384SStefan Weinhuber struct request *req, 3898f3eb5384SStefan Weinhuber sector_t first_rec, 3899f3eb5384SStefan Weinhuber sector_t last_rec, 3900f3eb5384SStefan Weinhuber sector_t first_trk, 3901f3eb5384SStefan Weinhuber sector_t last_trk, 3902f3eb5384SStefan Weinhuber unsigned int first_offs, 3903f3eb5384SStefan Weinhuber unsigned int last_offs, 3904f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3905f3eb5384SStefan Weinhuber unsigned int blksize) 39061da177e4SLinus Torvalds { 39071da177e4SLinus Torvalds struct dasd_eckd_private *private; 39081da177e4SLinus Torvalds unsigned long *idaws; 39091da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 39101da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 39111da177e4SLinus Torvalds struct ccw1 *ccw; 39125705f702SNeilBrown struct req_iterator iter; 39137988613bSKent Overstreet struct bio_vec bv; 39141da177e4SLinus Torvalds char *dst; 3915f3eb5384SStefan Weinhuber unsigned int off; 39161da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3917f3eb5384SStefan Weinhuber sector_t recid; 39181da177e4SLinus Torvalds unsigned char cmd, rcmd; 39198e09f215SStefan Weinhuber int use_prefix; 39208e09f215SStefan Weinhuber struct dasd_device *basedev; 39211da177e4SLinus Torvalds 39228e09f215SStefan Weinhuber basedev = block->base; 3923543691a4SSebastian Ott private = basedev->private; 39241da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39251da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 39261da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 39271da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 39281da177e4SLinus Torvalds else 39291da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3930f3eb5384SStefan Weinhuber 39311da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 39321da177e4SLinus Torvalds count = 0; 39331da177e4SLinus Torvalds cidaw = 0; 39345705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39357988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 39361da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 39371da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 39387988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 39397988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 39407988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 39411da177e4SLinus Torvalds } 39421da177e4SLinus Torvalds /* Paranoia. */ 39431da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 39441da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 39458e09f215SStefan Weinhuber 39468e09f215SStefan Weinhuber /* use the prefix command if available */ 39478e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 39488e09f215SStefan Weinhuber if (use_prefix) { 39498e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 39508e09f215SStefan Weinhuber cplength = 2 + count; 39518e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 39528e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 39538e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 39548e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 39558e09f215SStefan Weinhuber } else { 39561da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 39571da177e4SLinus Torvalds cplength = 2 + count; 39581da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 39598e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 39608e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 39611da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 39628e09f215SStefan Weinhuber } 39631da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 39641da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 39651da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 39661da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 39671da177e4SLinus Torvalds cplength += count; 39681da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 39691da177e4SLinus Torvalds } 39701da177e4SLinus Torvalds /* Allocate the ccw request. */ 397168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3972c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 39731da177e4SLinus Torvalds if (IS_ERR(cqr)) 39741da177e4SLinus Torvalds return cqr; 39751da177e4SLinus Torvalds ccw = cqr->cpaddr; 39768e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 39778e09f215SStefan Weinhuber if (use_prefix) { 39788e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 39798e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 39808e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 39818e09f215SStefan Weinhuber * Try again later. 39828e09f215SStefan Weinhuber */ 39838e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3984d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3985d54853efSMartin Schwidefsky } 39868e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 39878e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 39888e09f215SStefan Weinhuber } else { 39898e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 399045f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 39918e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 39928e09f215SStefan Weinhuber * Try again later. 39938e09f215SStefan Weinhuber */ 39948e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 39958e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 39968e09f215SStefan Weinhuber } 39978e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 39988e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 39998e09f215SStefan Weinhuber } 40001da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 40011da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 40021da177e4SLinus Torvalds recid = first_rec; 40031da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 40041da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 40051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40061da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 40078e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 40081da177e4SLinus Torvalds } 40095705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4010bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 40111da177e4SLinus Torvalds if (dasd_page_cache) { 40121da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 4013441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 40141da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 40157988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 40161da177e4SLinus Torvalds if (copy) 40177988613bSKent Overstreet dst = copy + bv.bv_offset; 40181da177e4SLinus Torvalds } 40197988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 40201da177e4SLinus Torvalds sector_t trkid = recid; 40211da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 40221da177e4SLinus Torvalds rcmd = cmd; 40231da177e4SLinus Torvalds count = blksize; 40241da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 40251da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 40261da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 40271da177e4SLinus Torvalds rcmd |= 0x8; 40281da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 4029ec5883abSHorst Hummel if (count < blksize && 4030ec5883abSHorst Hummel rq_data_dir(req) == READ) 40311da177e4SLinus Torvalds memset(dst + count, 0xe5, 40321da177e4SLinus Torvalds blksize - count); 40331da177e4SLinus Torvalds } 40341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40351da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 40361da177e4SLinus Torvalds trkid, recoffs + 1, 40378e09f215SStefan Weinhuber 1, rcmd, basedev, count); 40381da177e4SLinus Torvalds } 40391da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 40401da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 40411da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40421da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 40431da177e4SLinus Torvalds trkid, recoffs + 1, 40441da177e4SLinus Torvalds last_rec - recid + 1, 40458e09f215SStefan Weinhuber cmd, basedev, count); 40461da177e4SLinus Torvalds } 40471da177e4SLinus Torvalds /* Read/write ccw. */ 40481da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40491da177e4SLinus Torvalds ccw->cmd_code = rcmd; 40501da177e4SLinus Torvalds ccw->count = count; 40511da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 40521da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 40531da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 40541da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 40551da177e4SLinus Torvalds } else { 40561da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 40571da177e4SLinus Torvalds ccw->flags = 0; 40581da177e4SLinus Torvalds } 40591da177e4SLinus Torvalds ccw++; 40601da177e4SLinus Torvalds dst += blksize; 40611da177e4SLinus Torvalds recid++; 40621da177e4SLinus Torvalds } 40631da177e4SLinus Torvalds } 406413de227bSHolger Smolinski if (blk_noretry_request(req) || 406513de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 40661c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 40678e09f215SStefan Weinhuber cqr->startdev = startdev; 40688e09f215SStefan Weinhuber cqr->memdev = startdev; 40698e09f215SStefan Weinhuber cqr->block = block; 40707c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4071c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 40721f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 40731aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 40741da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 40755e2b17e7SJan Höppner 40765e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 40775e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 40785e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 40795e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 40805e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 40815e2b17e7SJan Höppner } 40825e2b17e7SJan Höppner 40831da177e4SLinus Torvalds return cqr; 40841da177e4SLinus Torvalds } 40851da177e4SLinus Torvalds 4086f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4087f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4088f3eb5384SStefan Weinhuber struct dasd_block *block, 4089f3eb5384SStefan Weinhuber struct request *req, 4090f3eb5384SStefan Weinhuber sector_t first_rec, 4091f3eb5384SStefan Weinhuber sector_t last_rec, 4092f3eb5384SStefan Weinhuber sector_t first_trk, 4093f3eb5384SStefan Weinhuber sector_t last_trk, 4094f3eb5384SStefan Weinhuber unsigned int first_offs, 4095f3eb5384SStefan Weinhuber unsigned int last_offs, 4096f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4097f3eb5384SStefan Weinhuber unsigned int blksize) 4098f3eb5384SStefan Weinhuber { 4099f3eb5384SStefan Weinhuber unsigned long *idaws; 4100f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4101f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4102f3eb5384SStefan Weinhuber struct req_iterator iter; 41037988613bSKent Overstreet struct bio_vec bv; 4104f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 4105f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 4106f3eb5384SStefan Weinhuber unsigned int tlf; 4107f3eb5384SStefan Weinhuber sector_t recid; 4108f3eb5384SStefan Weinhuber unsigned char cmd; 4109f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4110f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 4111f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4112f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 4113f3eb5384SStefan Weinhuber sector_t trkid; 4114f3eb5384SStefan Weinhuber unsigned int recoffs; 4115f3eb5384SStefan Weinhuber 4116f3eb5384SStefan Weinhuber basedev = block->base; 4117f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 4118f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4119f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 4120f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4121f3eb5384SStefan Weinhuber else 4122f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4123f3eb5384SStefan Weinhuber 4124f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 4125f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 4126f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 4127f3eb5384SStefan Weinhuber * of records as upper limit. 4128f3eb5384SStefan Weinhuber */ 4129f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 4130f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4131f3eb5384SStefan Weinhuber 4132f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 4133f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 4134f3eb5384SStefan Weinhuber 41357bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4136f3eb5384SStefan Weinhuber 4137f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 413868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4139c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 4140f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4141f3eb5384SStefan Weinhuber return cqr; 4142f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4143f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4144f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4145f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4146f3eb5384SStefan Weinhuber else 4147f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4148f3eb5384SStefan Weinhuber tlf *= blksize; 4149f3eb5384SStefan Weinhuber 4150f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 4151f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 4152f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 4153f3eb5384SStefan Weinhuber trkcount, blksize, 4154f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 4155f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4156f3eb5384SStefan Weinhuber * Try again later. 4157f3eb5384SStefan Weinhuber */ 4158f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4159f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 4160f3eb5384SStefan Weinhuber } 4161f3eb5384SStefan Weinhuber 4162f3eb5384SStefan Weinhuber /* 4163f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 4164f3eb5384SStefan Weinhuber * following conditions: 4165f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 4166f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 4167f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 4168f3eb5384SStefan Weinhuber */ 4169f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 4170f3eb5384SStefan Weinhuber recid = first_rec; 4171f3eb5384SStefan Weinhuber new_track = 1; 4172f3eb5384SStefan Weinhuber end_idaw = 0; 4173f3eb5384SStefan Weinhuber len_to_track_end = 0; 4174246ccea1SMartin Schwidefsky idaw_dst = NULL; 4175f3eb5384SStefan Weinhuber idaw_len = 0; 4176f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4177bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 41787988613bSKent Overstreet seg_len = bv.bv_len; 4179f3eb5384SStefan Weinhuber while (seg_len) { 4180f3eb5384SStefan Weinhuber if (new_track) { 4181f3eb5384SStefan Weinhuber trkid = recid; 4182f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 4183f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 4184f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 4185f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 4186f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 4187f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4188f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 4189f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 4190f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4191f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 4192f3eb5384SStefan Weinhuber ccw++; 4193f3eb5384SStefan Weinhuber recid += count; 4194f3eb5384SStefan Weinhuber new_track = 0; 419552db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 419652db45c3SStefan Weinhuber if (!idaw_dst) 419752db45c3SStefan Weinhuber idaw_dst = dst; 4198f3eb5384SStefan Weinhuber } 419952db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 420052db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 4201f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 4202f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 4203f3eb5384SStefan Weinhuber * idaw ends 4204f3eb5384SStefan Weinhuber */ 420552db45c3SStefan Weinhuber if (!idaw_dst) { 420652db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 420752db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 420852db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 420952db45c3SStefan Weinhuber } else 4210f3eb5384SStefan Weinhuber idaw_dst = dst; 421152db45c3SStefan Weinhuber } 4212f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 4213f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4214f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 4215f3eb5384SStefan Weinhuber } 4216f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4217f3eb5384SStefan Weinhuber seg_len -= part_len; 4218f3eb5384SStefan Weinhuber dst += part_len; 4219f3eb5384SStefan Weinhuber idaw_len += part_len; 4220f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 4221f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 4222f3eb5384SStefan Weinhuber * -> create an idaw 4223f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 4224f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 4225f3eb5384SStefan Weinhuber */ 4226f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4227f3eb5384SStefan Weinhuber end_idaw = 1; 4228f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 4229f3eb5384SStefan Weinhuber if (!len_to_track_end) { 4230f3eb5384SStefan Weinhuber new_track = 1; 4231f3eb5384SStefan Weinhuber end_idaw = 1; 4232f3eb5384SStefan Weinhuber } 4233f3eb5384SStefan Weinhuber if (end_idaw) { 4234f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 4235f3eb5384SStefan Weinhuber idaw_len); 4236246ccea1SMartin Schwidefsky idaw_dst = NULL; 4237f3eb5384SStefan Weinhuber idaw_len = 0; 4238f3eb5384SStefan Weinhuber end_idaw = 0; 4239f3eb5384SStefan Weinhuber } 4240f3eb5384SStefan Weinhuber } 4241f3eb5384SStefan Weinhuber } 4242f3eb5384SStefan Weinhuber 4243f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4244f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4245f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4246f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4247f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4248f3eb5384SStefan Weinhuber cqr->block = block; 42497c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4250c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 42511f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 42521aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4253f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 42545e2b17e7SJan Höppner 42555e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 42565e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 42575e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 42585e2b17e7SJan Höppner 4259f3eb5384SStefan Weinhuber return cqr; 4260f3eb5384SStefan Weinhuber } 4261f3eb5384SStefan Weinhuber 4262f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4263f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4264f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4265f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4266f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4267f3eb5384SStefan Weinhuber unsigned int blksize, 4268f3eb5384SStefan Weinhuber unsigned int total_data_size, 4269f3eb5384SStefan Weinhuber unsigned int tlf, 4270f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4271f3eb5384SStefan Weinhuber { 4272f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4273f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4274f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4275f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4276f3eb5384SStefan Weinhuber struct dcw *dcw; 4277f3eb5384SStefan Weinhuber 4278f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4279f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4280f3eb5384SStefan Weinhuber u8 pfx_cmd; 4281f3eb5384SStefan Weinhuber 4282f3eb5384SStefan Weinhuber int rc = 0; 4283f3eb5384SStefan Weinhuber int sector = 0; 4284f3eb5384SStefan Weinhuber int dn, d; 4285f3eb5384SStefan Weinhuber 4286f3eb5384SStefan Weinhuber 4287f3eb5384SStefan Weinhuber /* setup prefix data */ 4288543691a4SSebastian Ott basepriv = basedev->private; 4289543691a4SSebastian Ott startpriv = startdev->private; 4290f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4291f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4292f3eb5384SStefan Weinhuber 4293f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4294f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4295542e30ceSStefan Haberland pfxdata.base_address = basepriv->conf.ned->unit_addr; 4296542e30ceSStefan Haberland pfxdata.base_lss = basepriv->conf.ned->ID; 4297f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4298f3eb5384SStefan Weinhuber 4299f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4300da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4301f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4302da340f92SStefan Haberland 4303da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4304da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4305f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4306f3eb5384SStefan Weinhuber } 4307f3eb5384SStefan Weinhuber 4308f3eb5384SStefan Weinhuber switch (cmd) { 4309f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4310f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4311f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4312f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4313f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4314f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4315f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4316f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4317f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4318f3eb5384SStefan Weinhuber break; 4319f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4320f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4321f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4322f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 43235628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4324f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4325f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4326f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4327f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4328f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 432945f186beSJan Höppner /* 433045f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 433145f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 433245f186beSJan Höppner * data as well. 433345f186beSJan Höppner */ 433445f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 433545f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4336f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4337f3eb5384SStefan Weinhuber break; 43388fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 43398fd57520SJan Höppner dedata->mask.perm = 0x1; 43408fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 43418fd57520SJan Höppner dedata->ga_extended |= 0x42; 43428fd57520SJan Höppner dedata->blk_size = blksize; 43438fd57520SJan Höppner lredata->operation.orientation = 0x2; 43448fd57520SJan Höppner lredata->operation.operation = 0x16; 43458fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 43468fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 43478fd57520SJan Höppner break; 4348f3eb5384SStefan Weinhuber default: 4349f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4350f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4351f3eb5384SStefan Weinhuber BUG(); 4352f3eb5384SStefan Weinhuber break; 4353f3eb5384SStefan Weinhuber } 4354f3eb5384SStefan Weinhuber if (rc) 4355f3eb5384SStefan Weinhuber return rc; 4356f3eb5384SStefan Weinhuber 4357f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4358f3eb5384SStefan Weinhuber 4359f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4360f3eb5384SStefan Weinhuber begcyl = trk / heads; 4361f3eb5384SStefan Weinhuber beghead = trk % heads; 4362f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4363f3eb5384SStefan Weinhuber endhead = totrk % heads; 4364f3eb5384SStefan Weinhuber 4365f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4366f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4367f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4368f3eb5384SStefan Weinhuber 4369f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4370f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4371f3eb5384SStefan Weinhuber else 4372f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4373f3eb5384SStefan Weinhuber } 4374f3eb5384SStefan Weinhuber 4375f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4376f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4377f3eb5384SStefan Weinhuber 4378f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4379f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4380f3eb5384SStefan Weinhuber 4381f3eb5384SStefan Weinhuber if (rec_on_trk) { 4382f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4383f3eb5384SStefan Weinhuber case 0x3390: 4384f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4385f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4386f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4387f3eb5384SStefan Weinhuber break; 4388f3eb5384SStefan Weinhuber case 0x3380: 4389f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4390f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4391f3eb5384SStefan Weinhuber break; 4392f3eb5384SStefan Weinhuber } 4393f3eb5384SStefan Weinhuber } 4394f3eb5384SStefan Weinhuber 43958fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 43968fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 43978fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 43988fd57520SJan Höppner lredata->sector = 0xff; 43998fd57520SJan Höppner } else { 4400f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4401f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 44028fd57520SJan Höppner lredata->sector = sector; 44038fd57520SJan Höppner } 4404f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4405f3eb5384SStefan Weinhuber lredata->length = tlf; 4406f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4407f3eb5384SStefan Weinhuber lredata->count = count; 4408f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4409f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4410f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4411f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4412f3eb5384SStefan Weinhuber 4413f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4414f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4415757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4416f3eb5384SStefan Weinhuber } 4417f3eb5384SStefan Weinhuber 4418f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4419f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4420f3eb5384SStefan Weinhuber struct dasd_block *block, 4421f3eb5384SStefan Weinhuber struct request *req, 4422f3eb5384SStefan Weinhuber sector_t first_rec, 4423f3eb5384SStefan Weinhuber sector_t last_rec, 4424f3eb5384SStefan Weinhuber sector_t first_trk, 4425f3eb5384SStefan Weinhuber sector_t last_trk, 4426f3eb5384SStefan Weinhuber unsigned int first_offs, 4427f3eb5384SStefan Weinhuber unsigned int last_offs, 4428f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4429f3eb5384SStefan Weinhuber unsigned int blksize) 4430f3eb5384SStefan Weinhuber { 4431f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4432f3eb5384SStefan Weinhuber struct req_iterator iter; 44337988613bSKent Overstreet struct bio_vec bv; 4434f3eb5384SStefan Weinhuber char *dst; 4435f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4436f3eb5384SStefan Weinhuber unsigned char cmd; 4437f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4438f3eb5384SStefan Weinhuber unsigned int tlf; 4439f3eb5384SStefan Weinhuber struct itcw *itcw; 4440f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4441f3eb5384SStefan Weinhuber int itcw_op; 4442f3eb5384SStefan Weinhuber size_t itcw_size; 4443ef19298bSStefan Weinhuber u8 tidaw_flags; 4444ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4445ef19298bSStefan Weinhuber unsigned char new_track; 4446ef19298bSStefan Weinhuber sector_t recid, trkid; 4447ef19298bSStefan Weinhuber unsigned int offs; 4448ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4449cd10502bSJulia Lawall int ret; 4450f3eb5384SStefan Weinhuber 4451f3eb5384SStefan Weinhuber basedev = block->base; 4452f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4453f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4454f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4455f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4456f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4457f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4458f3eb5384SStefan Weinhuber } else 4459f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4460f3eb5384SStefan Weinhuber 4461f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4462f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4463f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4464ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4465ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4466f3eb5384SStefan Weinhuber */ 4467f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4468f3eb5384SStefan Weinhuber ctidaw = 0; 4469f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4470f3eb5384SStefan Weinhuber ++ctidaw; 4471f3eb5384SStefan Weinhuber } 4472ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4473ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4474f3eb5384SStefan Weinhuber 4475f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4476f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4477c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4478c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4479f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4480f3eb5384SStefan Weinhuber return cqr; 4481f3eb5384SStefan Weinhuber 4482f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4483f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4484f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4485f3eb5384SStefan Weinhuber else 4486f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4487f3eb5384SStefan Weinhuber tlf *= blksize; 4488f3eb5384SStefan Weinhuber 4489f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4490ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4491cd10502bSJulia Lawall ret = -EINVAL; 4492cd10502bSJulia Lawall goto out_error; 4493ef19298bSStefan Weinhuber } 4494f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4495f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4496f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4497f3eb5384SStefan Weinhuber first_offs + 1, 4498f3eb5384SStefan Weinhuber trkcount, blksize, 4499f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4500f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4501f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4502f3eb5384SStefan Weinhuber * Try again later. 4503f3eb5384SStefan Weinhuber */ 4504cd10502bSJulia Lawall ret = -EAGAIN; 4505cd10502bSJulia Lawall goto out_error; 4506f3eb5384SStefan Weinhuber } 4507d54cddb6SHeiko Carstens len_to_track_end = 0; 4508f3eb5384SStefan Weinhuber /* 4509f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4510f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4511f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4512f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4513ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4514ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4515f3eb5384SStefan Weinhuber */ 4516ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4517ef19298bSStefan Weinhuber new_track = 1; 4518ef19298bSStefan Weinhuber recid = first_rec; 4519f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4520bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 45217988613bSKent Overstreet seg_len = bv.bv_len; 4522ef19298bSStefan Weinhuber while (seg_len) { 4523ef19298bSStefan Weinhuber if (new_track) { 4524ef19298bSStefan Weinhuber trkid = recid; 4525ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4526ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4527ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4528ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4529ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4530ef19298bSStefan Weinhuber recid += count; 4531ef19298bSStefan Weinhuber new_track = 0; 4532f3eb5384SStefan Weinhuber } 4533ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4534ef19298bSStefan Weinhuber seg_len -= part_len; 4535ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4536ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4537ef19298bSStefan Weinhuber if (!len_to_track_end) { 4538ef19298bSStefan Weinhuber new_track = 1; 4539ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4540ef19298bSStefan Weinhuber } else 4541ef19298bSStefan Weinhuber tidaw_flags = 0; 4542ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4543ef19298bSStefan Weinhuber dst, part_len); 4544cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4545cd10502bSJulia Lawall ret = -EINVAL; 4546cd10502bSJulia Lawall goto out_error; 4547cd10502bSJulia Lawall } 4548ef19298bSStefan Weinhuber dst += part_len; 4549ef19298bSStefan Weinhuber } 4550ef19298bSStefan Weinhuber } 4551ef19298bSStefan Weinhuber } else { 4552ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4553bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 4554ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 45557988613bSKent Overstreet dst, bv.bv_len); 4556cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4557cd10502bSJulia Lawall ret = -EINVAL; 4558cd10502bSJulia Lawall goto out_error; 4559cd10502bSJulia Lawall } 4560ef19298bSStefan Weinhuber } 4561ef19298bSStefan Weinhuber } 4562ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4563ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4564f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4565f3eb5384SStefan Weinhuber 4566f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4567f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4568f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4569ef19298bSStefan Weinhuber cqr->cpmode = 1; 4570f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4571f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4572f3eb5384SStefan Weinhuber cqr->block = block; 45737c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4574c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 45751f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 45761aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4577f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 45785e2b17e7SJan Höppner 45795e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 45805e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 45815e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 45825e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 45835e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 45845e2b17e7SJan Höppner } 45855e2b17e7SJan Höppner 4586f3eb5384SStefan Weinhuber return cqr; 4587cd10502bSJulia Lawall out_error: 4588cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4589cd10502bSJulia Lawall return ERR_PTR(ret); 4590f3eb5384SStefan Weinhuber } 4591f3eb5384SStefan Weinhuber 4592f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4593f3eb5384SStefan Weinhuber struct dasd_block *block, 4594f3eb5384SStefan Weinhuber struct request *req) 4595f3eb5384SStefan Weinhuber { 4596ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4597f3eb5384SStefan Weinhuber int use_prefix; 4598ef19298bSStefan Weinhuber int fcx_multitrack; 459945b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4600f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4601f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4602f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4603f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4604f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4605f3eb5384SStefan Weinhuber int cdlspecial; 4606ef19298bSStefan Weinhuber unsigned int data_size; 4607f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4608f3eb5384SStefan Weinhuber 4609f3eb5384SStefan Weinhuber basedev = block->base; 4610543691a4SSebastian Ott private = basedev->private; 4611f3eb5384SStefan Weinhuber 4612f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4613f3eb5384SStefan Weinhuber blksize = block->bp_block; 4614f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 46156fca97a9SStefan Haberland if (blk_per_trk == 0) 46166fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4617f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 461883096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4619f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4620f3eb5384SStefan Weinhuber last_rec = last_trk = 462183096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4622f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4623f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4624f3eb5384SStefan Weinhuber 4625ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4626ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 462726a35f37SStefan Weinhuber if (data_size % blksize) 462826a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4629ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4630ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4631ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4632f3eb5384SStefan Weinhuber 4633f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4634f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4635f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4636f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4637f3eb5384SStefan Weinhuber 4638f3eb5384SStefan Weinhuber cqr = NULL; 4639f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4640f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4641ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4642ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4643f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4644f3eb5384SStefan Weinhuber first_rec, last_rec, 4645f3eb5384SStefan Weinhuber first_trk, last_trk, 4646f3eb5384SStefan Weinhuber first_offs, last_offs, 4647f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4648ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4649ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4650f3eb5384SStefan Weinhuber cqr = NULL; 4651f3eb5384SStefan Weinhuber } else if (use_prefix && 4652f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4653f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4654f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4655f3eb5384SStefan Weinhuber first_rec, last_rec, 4656f3eb5384SStefan Weinhuber first_trk, last_trk, 4657f3eb5384SStefan Weinhuber first_offs, last_offs, 4658f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4659ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4660ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4661f3eb5384SStefan Weinhuber cqr = NULL; 4662f3eb5384SStefan Weinhuber } 4663f3eb5384SStefan Weinhuber if (!cqr) 4664f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4665f3eb5384SStefan Weinhuber first_rec, last_rec, 4666f3eb5384SStefan Weinhuber first_trk, last_trk, 4667f3eb5384SStefan Weinhuber first_offs, last_offs, 4668f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4669f3eb5384SStefan Weinhuber return cqr; 4670f3eb5384SStefan Weinhuber } 4671f3eb5384SStefan Weinhuber 4672bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4673e4dbb0f2SStefan Haberland struct dasd_block *block, 4674e4dbb0f2SStefan Haberland struct request *req) 4675e4dbb0f2SStefan Haberland { 46769d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4677e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4678e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4679558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 46809d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 46819d2be0c1SJan Höppner struct dasd_device *basedev; 46829d2be0c1SJan Höppner struct req_iterator iter; 46839d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 46849d2be0c1SJan Höppner unsigned int first_offs; 46859d2be0c1SJan Höppner unsigned int trkcount; 46869d2be0c1SJan Höppner unsigned long *idaws; 46879d2be0c1SJan Höppner unsigned int size; 46889d2be0c1SJan Höppner unsigned char cmd; 46899d2be0c1SJan Höppner struct bio_vec bv; 46909d2be0c1SJan Höppner struct ccw1 *ccw; 46919d2be0c1SJan Höppner int use_prefix; 46929d2be0c1SJan Höppner void *data; 46939d2be0c1SJan Höppner char *dst; 4694e4dbb0f2SStefan Haberland 4695e4dbb0f2SStefan Haberland /* 4696e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4697558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4698558b9ef0SStefan Weinhuber * the request with dummy pages. 4699e4dbb0f2SStefan Haberland */ 4700558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4701558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4702558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4703558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4704558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4705558b9ef0SStefan Weinhuber basedev = block->base; 4706558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4707558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4708558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4709e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4710558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 47119d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4712e4dbb0f2SStefan Haberland } 4713e4dbb0f2SStefan Haberland 4714e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4715e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4716e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4717e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4718e4dbb0f2SStefan Haberland first_offs = 0; 4719e4dbb0f2SStefan Haberland 4720e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4721e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4722e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4723e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 47249d2be0c1SJan Höppner else 47259d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4726e4dbb0f2SStefan Haberland 4727e4dbb0f2SStefan Haberland /* 4728e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4729e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4730e4dbb0f2SStefan Haberland */ 4731e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4732e4dbb0f2SStefan Haberland 4733e4dbb0f2SStefan Haberland /* 47349d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 47359d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4736e4dbb0f2SStefan Haberland */ 47379d2be0c1SJan Höppner base_priv = basedev->private; 47389d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 47399d2be0c1SJan Höppner if (use_prefix) { 47409d2be0c1SJan Höppner cplength = 1 + trkcount; 47419d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 47429d2be0c1SJan Höppner } else { 47439d2be0c1SJan Höppner cplength = 2 + trkcount; 47449d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 47459d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 47469d2be0c1SJan Höppner } 47479d2be0c1SJan Höppner size = ALIGN(size, 8); 4748e4dbb0f2SStefan Haberland 47497bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4750e4dbb0f2SStefan Haberland 4751e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4752e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4753c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4754e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 47559d2be0c1SJan Höppner return cqr; 4756e4dbb0f2SStefan Haberland 47579d2be0c1SJan Höppner ccw = cqr->cpaddr; 47589d2be0c1SJan Höppner data = cqr->data; 47599d2be0c1SJan Höppner 47609d2be0c1SJan Höppner if (use_prefix) { 47619d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 47629d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 47639d2be0c1SJan Höppner } else { 47649d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 47659d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 47669d2be0c1SJan Höppner 47679d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 47689d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 47699d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4770e4dbb0f2SStefan Haberland } 4771e4dbb0f2SStefan Haberland 47729d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4773e4dbb0f2SStefan Haberland len_to_track_end = 0; 4774558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4775558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4776558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4777558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4778558b9ef0SStefan Weinhuber ccw->count = 57326; 4779558b9ef0SStefan Weinhuber /* 64k map to one track */ 4780558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4781558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4782558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4783558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4784558b9ef0SStefan Weinhuber ccw++; 4785558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4786558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4787558b9ef0SStefan Weinhuber } 4788e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 4789bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 47907988613bSKent Overstreet seg_len = bv.bv_len; 4791558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4792558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4793e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4794e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4795e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4796e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4797e4dbb0f2SStefan Haberland ccw->count = 57326; 4798e4dbb0f2SStefan Haberland /* 64k map to one track */ 4799e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4800e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4801e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4802e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4803e4dbb0f2SStefan Haberland ccw++; 4804e4dbb0f2SStefan Haberland } 4805e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4806e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4807e4dbb0f2SStefan Haberland } 4808558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4809558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4810e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4811e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4812e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4813e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4814e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4815e4dbb0f2SStefan Haberland cqr->block = block; 4816e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4817c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 48181f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 48191aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4820e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4821e4dbb0f2SStefan Haberland 4822e4dbb0f2SStefan Haberland return cqr; 4823e4dbb0f2SStefan Haberland } 4824e4dbb0f2SStefan Haberland 4825e4dbb0f2SStefan Haberland 48261da177e4SLinus Torvalds static int 48271da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 48281da177e4SLinus Torvalds { 48291da177e4SLinus Torvalds struct dasd_eckd_private *private; 48301da177e4SLinus Torvalds struct ccw1 *ccw; 48315705f702SNeilBrown struct req_iterator iter; 48327988613bSKent Overstreet struct bio_vec bv; 48331da177e4SLinus Torvalds char *dst, *cda; 48341da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 48351da177e4SLinus Torvalds sector_t recid; 48365705f702SNeilBrown int status; 48371da177e4SLinus Torvalds 48381da177e4SLinus Torvalds if (!dasd_page_cache) 48391da177e4SLinus Torvalds goto out; 4840543691a4SSebastian Ott private = cqr->block->base->private; 48418e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 48421da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 484383096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 48441da177e4SLinus Torvalds ccw = cqr->cpaddr; 48451da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 48461da177e4SLinus Torvalds ccw++; 48471da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 48481da177e4SLinus Torvalds ccw++; 48495705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4850bf5fb875SChristoph Hellwig dst = bvec_virt(&bv); 48517988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 48521da177e4SLinus Torvalds /* Skip locate record. */ 48531da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 48541da177e4SLinus Torvalds ccw++; 48551da177e4SLinus Torvalds if (dst) { 48561da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 48571da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 48581da177e4SLinus Torvalds else 48591da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 48601da177e4SLinus Torvalds if (dst != cda) { 48611da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 48627988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 48631da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 48641da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 48651da177e4SLinus Torvalds } 48661da177e4SLinus Torvalds dst = NULL; 48671da177e4SLinus Torvalds } 48681da177e4SLinus Torvalds ccw++; 48691da177e4SLinus Torvalds recid++; 48701da177e4SLinus Torvalds } 48711da177e4SLinus Torvalds } 48721da177e4SLinus Torvalds out: 48731da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 48748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48751da177e4SLinus Torvalds return status; 48761da177e4SLinus Torvalds } 48771da177e4SLinus Torvalds 48788e09f215SStefan Weinhuber /* 4879f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 48808e09f215SStefan Weinhuber * 48818e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 48828e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 48838e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 48848e09f215SStefan Weinhuber */ 48858e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 48868e09f215SStefan Weinhuber { 48878e09f215SStefan Weinhuber struct ccw1 *ccw; 48888e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4889f3eb5384SStefan Weinhuber struct tcw *tcw; 4890f3eb5384SStefan Weinhuber struct tccb *tccb; 4891f3eb5384SStefan Weinhuber struct dcw *dcw; 48928e09f215SStefan Weinhuber 4893f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4894f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4895f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4896f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4897f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4898f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4899f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4900f3eb5384SStefan Weinhuber } else { 49018e09f215SStefan Weinhuber ccw = cqr->cpaddr; 49028e09f215SStefan Weinhuber pfxdata = cqr->data; 49038e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 49048e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 49058e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 49068e09f215SStefan Weinhuber } 49078e09f215SStefan Weinhuber } 4908f3eb5384SStefan Weinhuber } 49098e09f215SStefan Weinhuber 49108e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 49118e09f215SStefan Weinhuber 49128e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 49138e09f215SStefan Weinhuber struct dasd_block *block, 49148e09f215SStefan Weinhuber struct request *req) 49158e09f215SStefan Weinhuber { 49168e09f215SStefan Weinhuber struct dasd_eckd_private *private; 4917964ce509SStefan Haberland struct dasd_device *startdev; 49187e64db15SJan Höppner unsigned long flags; 4919964ce509SStefan Haberland struct dasd_ccw_req *cqr; 49208e09f215SStefan Weinhuber 49218e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 49228e09f215SStefan Weinhuber if (!startdev) 49238e09f215SStefan Weinhuber startdev = base; 4924543691a4SSebastian Ott private = startdev->private; 49258e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 49268e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 49278e09f215SStefan Weinhuber 49288e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 49298e09f215SStefan Weinhuber private->count++; 4930e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4931bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4932e4dbb0f2SStefan Haberland else 49338e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 49348e09f215SStefan Weinhuber if (IS_ERR(cqr)) 49358e09f215SStefan Weinhuber private->count--; 49368e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 49378e09f215SStefan Weinhuber return cqr; 49388e09f215SStefan Weinhuber } 49398e09f215SStefan Weinhuber 49408e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 49418e09f215SStefan Weinhuber struct request *req) 49428e09f215SStefan Weinhuber { 49438e09f215SStefan Weinhuber struct dasd_eckd_private *private; 49448e09f215SStefan Weinhuber unsigned long flags; 49458e09f215SStefan Weinhuber 49468e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4947543691a4SSebastian Ott private = cqr->memdev->private; 49488e09f215SStefan Weinhuber private->count--; 49498e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 49508e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 49518e09f215SStefan Weinhuber } 49528e09f215SStefan Weinhuber 49531da177e4SLinus Torvalds static int 49541da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 49551da177e4SLinus Torvalds struct dasd_information2_t * info) 49561da177e4SLinus Torvalds { 4957543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49581da177e4SLinus Torvalds 49591da177e4SLinus Torvalds info->label_block = 2; 49601da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 49611da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4962543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 49631da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4964543691a4SSebastian Ott sizeof(private->rdc_data)); 4965542e30ceSStefan Haberland info->confdata_size = min_t(unsigned long, private->conf.len, 49664abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 4967542e30ceSStefan Haberland memcpy(info->configuration_data, private->conf.data, 49684abb08c2SStefan Weinhuber info->confdata_size); 49691da177e4SLinus Torvalds return 0; 49701da177e4SLinus Torvalds } 49711da177e4SLinus Torvalds 49721da177e4SLinus Torvalds /* 49731da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 49741da177e4SLinus Torvalds */ 49751da177e4SLinus Torvalds 49761da177e4SLinus Torvalds /* 49771da177e4SLinus Torvalds * Release device ioctl. 49781da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 49791da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 49801da177e4SLinus Torvalds */ 49811da177e4SLinus Torvalds static int 49821107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 49831da177e4SLinus Torvalds { 49841da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 49851da177e4SLinus Torvalds int rc; 4986f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4987f932bceaSStefan Weinhuber int useglobal; 49881da177e4SLinus Torvalds 49891da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 49901da177e4SLinus Torvalds return -EACCES; 49911da177e4SLinus Torvalds 4992f932bceaSStefan Weinhuber useglobal = 0; 4993c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 49941da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4995f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4996f932bceaSStefan Weinhuber useglobal = 1; 4997f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4998f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4999f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5000f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5001f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5002f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5003f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50041da177e4SLinus Torvalds } 5005f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5006f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 5007f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5008f3eb5384SStefan Weinhuber ccw->count = 32; 5009f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 50108e09f215SStefan Weinhuber cqr->startdev = device; 50118e09f215SStefan Weinhuber cqr->memdev = device; 50121da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50131c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5014336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50151da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50161aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50171da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50181da177e4SLinus Torvalds 50191da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50205a27e60dSStefan Weinhuber if (!rc) 50215a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50221da177e4SLinus Torvalds 5023f932bceaSStefan Weinhuber if (useglobal) 5024f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5025f932bceaSStefan Weinhuber else 50268e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50271da177e4SLinus Torvalds return rc; 50281da177e4SLinus Torvalds } 50291da177e4SLinus Torvalds 50301da177e4SLinus Torvalds /* 50311da177e4SLinus Torvalds * Reserve device ioctl. 50321da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 50331da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 50341da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 50351da177e4SLinus Torvalds */ 50361da177e4SLinus Torvalds static int 50371107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 50381da177e4SLinus Torvalds { 50391da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50401da177e4SLinus Torvalds int rc; 5041f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5042f932bceaSStefan Weinhuber int useglobal; 50431da177e4SLinus Torvalds 50441da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50451da177e4SLinus Torvalds return -EACCES; 50461da177e4SLinus Torvalds 5047f932bceaSStefan Weinhuber useglobal = 0; 5048c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50491da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5050f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5051f932bceaSStefan Weinhuber useglobal = 1; 5052f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5053f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5054f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5055f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5056f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5057f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5058f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50591da177e4SLinus Torvalds } 5060f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5061f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 5062f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5063f3eb5384SStefan Weinhuber ccw->count = 32; 5064f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 50658e09f215SStefan Weinhuber cqr->startdev = device; 50668e09f215SStefan Weinhuber cqr->memdev = device; 50671da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50681c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5069336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50701da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50711aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50721da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50731da177e4SLinus Torvalds 50741da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50755a27e60dSStefan Weinhuber if (!rc) 50765a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50771da177e4SLinus Torvalds 5078f932bceaSStefan Weinhuber if (useglobal) 5079f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5080f932bceaSStefan Weinhuber else 50818e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50821da177e4SLinus Torvalds return rc; 50831da177e4SLinus Torvalds } 50841da177e4SLinus Torvalds 50851da177e4SLinus Torvalds /* 50861da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 50871da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 50881da177e4SLinus Torvalds * (unconditional reserve) 50891da177e4SLinus Torvalds */ 50901da177e4SLinus Torvalds static int 50911107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 50921da177e4SLinus Torvalds { 50931da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50941da177e4SLinus Torvalds int rc; 5095f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5096f932bceaSStefan Weinhuber int useglobal; 50971da177e4SLinus Torvalds 50981da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50991da177e4SLinus Torvalds return -EACCES; 51001da177e4SLinus Torvalds 5101f932bceaSStefan Weinhuber useglobal = 0; 5102c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 51031da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5104f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5105f932bceaSStefan Weinhuber useglobal = 1; 5106f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5107f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5108f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5109f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5110f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5111f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5112f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 51131da177e4SLinus Torvalds } 5114f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5115f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5116f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5117f3eb5384SStefan Weinhuber ccw->count = 32; 5118f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 51198e09f215SStefan Weinhuber cqr->startdev = device; 51208e09f215SStefan Weinhuber cqr->memdev = device; 51211da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 51221c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5123336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 51241da177e4SLinus Torvalds cqr->expires = 2 * HZ; 51251aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 51261da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 51271da177e4SLinus Torvalds 51281da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 51295a27e60dSStefan Weinhuber if (!rc) 51305a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 51311da177e4SLinus Torvalds 5132f932bceaSStefan Weinhuber if (useglobal) 5133f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5134f932bceaSStefan Weinhuber else 51358e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 51361da177e4SLinus Torvalds return rc; 51371da177e4SLinus Torvalds } 51381da177e4SLinus Torvalds 51391da177e4SLinus Torvalds /* 5140196339f1SStefan Weinhuber * SNID - Sense Path Group ID 5141196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 5142196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 5143196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 5144196339f1SStefan Weinhuber */ 5145196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 5146196339f1SStefan Weinhuber void __user *argp) 5147196339f1SStefan Weinhuber { 5148196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 5149196339f1SStefan Weinhuber int rc; 5150196339f1SStefan Weinhuber struct ccw1 *ccw; 5151196339f1SStefan Weinhuber int useglobal; 5152196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 5153196339f1SStefan Weinhuber 5154196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 5155196339f1SStefan Weinhuber return -EACCES; 5156196339f1SStefan Weinhuber 5157196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5158196339f1SStefan Weinhuber return -EFAULT; 5159196339f1SStefan Weinhuber 5160196339f1SStefan Weinhuber useglobal = 0; 5161196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5162c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 5163c5205f2fSSebastian Ott NULL); 5164196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 5165196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5166196339f1SStefan Weinhuber useglobal = 1; 5167196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5168196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5169196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5170196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5171196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5172196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5173196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 5174196339f1SStefan Weinhuber } 5175196339f1SStefan Weinhuber ccw = cqr->cpaddr; 5176196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 5177196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5178196339f1SStefan Weinhuber ccw->count = 12; 5179196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 5180196339f1SStefan Weinhuber cqr->startdev = device; 5181196339f1SStefan Weinhuber cqr->memdev = device; 5182196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5183196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 51845a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5185196339f1SStefan Weinhuber cqr->retries = 5; 5186196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 51871aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5188196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 5189196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 5190196339f1SStefan Weinhuber 5191196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 5192196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 5193196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5194196339f1SStefan Weinhuber rc = -EIO; 5195196339f1SStefan Weinhuber if (!rc) { 5196196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 5197196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5198196339f1SStefan Weinhuber rc = -EFAULT; 5199196339f1SStefan Weinhuber } 5200196339f1SStefan Weinhuber 5201196339f1SStefan Weinhuber if (useglobal) 5202196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5203196339f1SStefan Weinhuber else 5204196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 5205196339f1SStefan Weinhuber return rc; 5206196339f1SStefan Weinhuber } 5207196339f1SStefan Weinhuber 5208196339f1SStefan Weinhuber /* 52091da177e4SLinus Torvalds * Read performance statistics 52101da177e4SLinus Torvalds */ 52111da177e4SLinus Torvalds static int 52121107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 52131da177e4SLinus Torvalds { 52141da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 52151da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 52161da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 52171da177e4SLinus Torvalds struct ccw1 *ccw; 52181da177e4SLinus Torvalds int rc; 52191da177e4SLinus Torvalds 522068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 52211da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 52221da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 5223c5205f2fSSebastian Ott device, NULL); 52241da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5225fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 52261da177e4SLinus Torvalds "Could not allocate initialization request"); 52271da177e4SLinus Torvalds return PTR_ERR(cqr); 52281da177e4SLinus Torvalds } 52298e09f215SStefan Weinhuber cqr->startdev = device; 52308e09f215SStefan Weinhuber cqr->memdev = device; 52311da177e4SLinus Torvalds cqr->retries = 0; 5232eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 52331da177e4SLinus Torvalds cqr->expires = 10 * HZ; 52341da177e4SLinus Torvalds 52351da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 52361da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 52371da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 52381da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 52395d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 52401da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 52411da177e4SLinus Torvalds 52421da177e4SLinus Torvalds ccw = cqr->cpaddr; 52431da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 52441da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 52451da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 52461da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 52471da177e4SLinus Torvalds 52481da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 52491da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 52501da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 52511da177e4SLinus Torvalds 52521da177e4SLinus Torvalds ccw++; 52531da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 52541da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 52551da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 52561da177e4SLinus Torvalds 52571aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 52581da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 52591da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 52601da177e4SLinus Torvalds if (rc == 0) { 52611da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 52621da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 52631107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 52641107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 52651107ccfbSChristoph Hellwig rc = -EFAULT; 52661da177e4SLinus Torvalds } 52678e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 52681da177e4SLinus Torvalds return rc; 52691da177e4SLinus Torvalds } 52701da177e4SLinus Torvalds 52711da177e4SLinus Torvalds /* 52721da177e4SLinus Torvalds * Get attributes (cache operations) 52731da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 52741da177e4SLinus Torvalds */ 52751da177e4SLinus Torvalds static int 52761107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 52771da177e4SLinus Torvalds { 5278543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 52791107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 52801da177e4SLinus Torvalds int rc; 52811da177e4SLinus Torvalds 52821da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 52831da177e4SLinus Torvalds return -EACCES; 52841107ccfbSChristoph Hellwig if (!argp) 52851da177e4SLinus Torvalds return -EINVAL; 52861da177e4SLinus Torvalds 52871107ccfbSChristoph Hellwig rc = 0; 52881107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 52891107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 52901107ccfbSChristoph Hellwig rc = -EFAULT; 52911da177e4SLinus Torvalds 52921da177e4SLinus Torvalds return rc; 52931da177e4SLinus Torvalds } 52941da177e4SLinus Torvalds 52951da177e4SLinus Torvalds /* 52961da177e4SLinus Torvalds * Set attributes (cache operations) 52971da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 52981da177e4SLinus Torvalds */ 52991da177e4SLinus Torvalds static int 53001107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 53011da177e4SLinus Torvalds { 5302543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 53031da177e4SLinus Torvalds struct attrib_data_t attrib; 53041da177e4SLinus Torvalds 53051da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 53061da177e4SLinus Torvalds return -EACCES; 53071107ccfbSChristoph Hellwig if (!argp) 53081da177e4SLinus Torvalds return -EINVAL; 53091da177e4SLinus Torvalds 53101107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 53111da177e4SLinus Torvalds return -EFAULT; 53121da177e4SLinus Torvalds private->attrib = attrib; 53131da177e4SLinus Torvalds 5314fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5315fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 53161da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 53171da177e4SLinus Torvalds return 0; 53181da177e4SLinus Torvalds } 53191da177e4SLinus Torvalds 5320ab1d848fSNigel Hislop /* 5321ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5322ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5323ab1d848fSNigel Hislop */ 5324ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5325ab1d848fSNigel Hislop { 5326ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5327ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5328ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5329ab1d848fSNigel Hislop struct ccw1 *ccw; 533052898025SNigel Hislop char psf0, psf1; 5331ab1d848fSNigel Hislop int rc; 5332ab1d848fSNigel Hislop 533352898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 533452898025SNigel Hislop return -EACCES; 533552898025SNigel Hislop psf0 = psf1 = 0; 533652898025SNigel Hislop 5337ab1d848fSNigel Hislop /* Copy parms from caller */ 5338ab1d848fSNigel Hislop rc = -EFAULT; 5339ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5340ab1d848fSNigel Hislop goto out; 534192d62891SHeiko Carstens if (is_compat_task()) { 5342ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5343ab1d848fSNigel Hislop rc = -EINVAL; 5344f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5345ab1d848fSNigel Hislop goto out; 5346f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5347f8b06859SHeiko Carstens goto out; 5348f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5349f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5350ab1d848fSNigel Hislop } 53514a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 53524a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 53534a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 53544a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 53554a8ef699SStefan Haberland usrparm.psf_data_len); 53564a8ef699SStefan Haberland rc = -EINVAL; 53574a8ef699SStefan Haberland goto out; 53584a8ef699SStefan Haberland } 5359ab1d848fSNigel Hislop /* alloc I/O data area */ 5360ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5361ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5362ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5363ab1d848fSNigel Hislop rc = -ENOMEM; 5364ab1d848fSNigel Hislop goto out_free; 5365ab1d848fSNigel Hislop } 5366ab1d848fSNigel Hislop 5367ab1d848fSNigel Hislop /* get syscall header from user space */ 5368ab1d848fSNigel Hislop rc = -EFAULT; 5369ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5370ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5371ab1d848fSNigel Hislop usrparm.psf_data_len)) 5372ab1d848fSNigel Hislop goto out_free; 537352898025SNigel Hislop psf0 = psf_data[0]; 537452898025SNigel Hislop psf1 = psf_data[1]; 5375ab1d848fSNigel Hislop 5376ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5377c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5378ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5379fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5380ab1d848fSNigel Hislop "Could not allocate initialization request"); 5381ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5382ab1d848fSNigel Hislop goto out_free; 5383ab1d848fSNigel Hislop } 5384ab1d848fSNigel Hislop 5385ab1d848fSNigel Hislop cqr->startdev = device; 5386ab1d848fSNigel Hislop cqr->memdev = device; 5387ab1d848fSNigel Hislop cqr->retries = 3; 5388ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 53891aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5390ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5391ab1d848fSNigel Hislop 5392ab1d848fSNigel Hislop /* Build the ccws */ 5393ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5394ab1d848fSNigel Hislop 5395ab1d848fSNigel Hislop /* PSF ccw */ 5396ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5397ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5398ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5399ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 5400ab1d848fSNigel Hislop 5401ab1d848fSNigel Hislop ccw++; 5402ab1d848fSNigel Hislop 5403ab1d848fSNigel Hislop /* RSSD ccw */ 5404ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5405ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5406ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5407ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 5408ab1d848fSNigel Hislop 5409ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5410ab1d848fSNigel Hislop if (rc) 5411ab1d848fSNigel Hislop goto out_sfree; 5412ab1d848fSNigel Hislop 5413ab1d848fSNigel Hislop rc = -EFAULT; 5414ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5415ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5416ab1d848fSNigel Hislop goto out_sfree; 5417ab1d848fSNigel Hislop rc = 0; 5418ab1d848fSNigel Hislop 5419ab1d848fSNigel Hislop out_sfree: 5420ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5421ab1d848fSNigel Hislop out_free: 5422ab1d848fSNigel Hislop kfree(rssd_result); 5423ab1d848fSNigel Hislop kfree(psf_data); 5424ab1d848fSNigel Hislop out: 542552898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 542652898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 542752898025SNigel Hislop (int) psf0, (int) psf1, rc); 5428ab1d848fSNigel Hislop return rc; 5429ab1d848fSNigel Hislop } 5430ab1d848fSNigel Hislop 54311107ccfbSChristoph Hellwig static int 54328e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 54331107ccfbSChristoph Hellwig { 54348e09f215SStefan Weinhuber struct dasd_device *device = block->base; 54358e09f215SStefan Weinhuber 54361107ccfbSChristoph Hellwig switch (cmd) { 54371107ccfbSChristoph Hellwig case BIODASDGATTR: 54381107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 54391107ccfbSChristoph Hellwig case BIODASDSATTR: 54401107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 54411107ccfbSChristoph Hellwig case BIODASDPSRD: 54421107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 54431107ccfbSChristoph Hellwig case BIODASDRLSE: 54441107ccfbSChristoph Hellwig return dasd_eckd_release(device); 54451107ccfbSChristoph Hellwig case BIODASDRSRV: 54461107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 54471107ccfbSChristoph Hellwig case BIODASDSLCK: 54481107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5449196339f1SStefan Weinhuber case BIODASDSNID: 5450196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5451ab1d848fSNigel Hislop case BIODASDSYMMIO: 5452ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 54531107ccfbSChristoph Hellwig default: 54546b79d14eSHeiko Carstens return -ENOTTY; 54551107ccfbSChristoph Hellwig } 54561107ccfbSChristoph Hellwig } 54571107ccfbSChristoph Hellwig 54581da177e4SLinus Torvalds /* 5459445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5460445b5b49SHorst Hummel * and return number of printed chars. 5461445b5b49SHorst Hummel */ 54624d284cacSHeiko Carstens static int 5463445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5464445b5b49SHorst Hummel { 5465445b5b49SHorst Hummel int len, count; 5466445b5b49SHorst Hummel char *datap; 5467445b5b49SHorst Hummel 5468445b5b49SHorst Hummel len = 0; 5469445b5b49SHorst Hummel while (from <= to) { 5470773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5471445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5472445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5473445b5b49SHorst Hummel 5474445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5475445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5476445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 5477445b5b49SHorst Hummel else 5478445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 5479445b5b49SHorst Hummel 5480445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 5481445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 5482445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 5483445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 5484445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5485445b5b49SHorst Hummel } 5486445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5487445b5b49SHorst Hummel from++; 5488445b5b49SHorst Hummel } 5489445b5b49SHorst Hummel return len; 5490445b5b49SHorst Hummel } 5491445b5b49SHorst Hummel 5492fc19f381SStefan Haberland static void 5493aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5494aeec92caSStefan Haberland char *reason) 5495fc19f381SStefan Haberland { 5496fc19f381SStefan Haberland u64 *sense; 5497a5a0061fSStefan Weinhuber u64 *stat; 5498fc19f381SStefan Haberland 5499aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5500a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5501fc19f381SStefan Haberland if (sense) { 5502a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5503a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5504a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5505ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5506fc19f381SStefan Haberland } else { 5507a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5508a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5509a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5510fc19f381SStefan Haberland } 5511fc19f381SStefan Haberland } 5512fc19f381SStefan Haberland 5513445b5b49SHorst Hummel /* 55141da177e4SLinus Torvalds * Print sense data and related channel program. 55151da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 55161da177e4SLinus Torvalds */ 5517f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 55188e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 55191da177e4SLinus Torvalds { 55201da177e4SLinus Torvalds char *page; 5521445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5522445b5b49SHorst Hummel int len, sl, sct; 55231da177e4SLinus Torvalds 55241da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 55251da177e4SLinus Torvalds if (page == NULL) { 5526fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5527fc19f381SStefan Haberland "No memory to dump sense data\n"); 55281da177e4SLinus Torvalds return; 55291da177e4SLinus Torvalds } 5530445b5b49SHorst Hummel /* dump the sense data */ 5531773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 55321da177e4SLinus Torvalds " I/O status report for device %s:\n", 55332a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5534773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5535a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5536a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5537a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5538a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5539a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5540a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5541773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55421da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 55432a0217d5SKay Sievers dev_name(&device->cdev->dev), 554423d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 55451da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 55461da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5547773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55481da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 55491da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 55501da177e4SLinus Torvalds 55511da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 55521da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 55531da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 55541da177e4SLinus Torvalds } 55551da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 55561da177e4SLinus Torvalds } 55571da177e4SLinus Torvalds 55581da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 55591da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5560773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55611da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 55621da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 55631da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 55641da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 55651da177e4SLinus Torvalds } else { 55661da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5567773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55681da177e4SLinus Torvalds " 32 Byte: Format: %x " 55691da177e4SLinus Torvalds "Exception class %x\n", 55701da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 55711da177e4SLinus Torvalds } 55721da177e4SLinus Torvalds } else { 5573773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55741da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 55751da177e4SLinus Torvalds } 5576773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55771da177e4SLinus Torvalds 55788e09f215SStefan Weinhuber if (req) { 55798e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5580445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5581445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5582445b5b49SHorst Hummel first = req->cpaddr; 5583445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5584445b5b49SHorst Hummel to = min(first + 6, last); 5585773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 55861da177e4SLinus Torvalds " Related CP in req: %p\n", req); 5587445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 5588773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55891da177e4SLinus Torvalds 5590445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5591445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 55921da177e4SLinus Torvalds len = 0; 5593445b5b49SHorst Hummel from = ++to; 559423d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 559523d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5596445b5b49SHorst Hummel if (from < fail - 2) { 5597445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5598773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 55991da177e4SLinus Torvalds } 5600445b5b49SHorst Hummel to = min(fail + 1, last); 5601445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 56021da177e4SLinus Torvalds 5603445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5604445b5b49SHorst Hummel from = max(from, ++to); 5605445b5b49SHorst Hummel if (from < last - 1) { 5606445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5607773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 56081da177e4SLinus Torvalds } 5609445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 56101da177e4SLinus Torvalds if (len > 0) 5611773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 56128e09f215SStefan Weinhuber } 56131da177e4SLinus Torvalds free_page((unsigned long) page); 56141da177e4SLinus Torvalds } 56151da177e4SLinus Torvalds 5616f3eb5384SStefan Weinhuber 5617f3eb5384SStefan Weinhuber /* 5618f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5619f3eb5384SStefan Weinhuber */ 5620f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5621f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5622f3eb5384SStefan Weinhuber { 5623f3eb5384SStefan Weinhuber char *page; 5624f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5625f3eb5384SStefan Weinhuber struct tsb *tsb; 5626ef19298bSStefan Weinhuber u8 *sense, *rcq; 5627f3eb5384SStefan Weinhuber 5628f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5629f3eb5384SStefan Weinhuber if (page == NULL) { 5630fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5631f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5632f3eb5384SStefan Weinhuber return; 5633f3eb5384SStefan Weinhuber } 5634f3eb5384SStefan Weinhuber /* dump the sense data */ 5635773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5636f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5637f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5638773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5639a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5640a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5641a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5642a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5643a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5644a521b048SStefan Haberland irb->scsw.tm.fcxs, 5645a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5646a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5647773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5648f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5649f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5650f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5651f3eb5384SStefan Weinhuber 5652f3eb5384SStefan Weinhuber tsb = NULL; 5653f3eb5384SStefan Weinhuber sense = NULL; 5654a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5655f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5656f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5657f3eb5384SStefan Weinhuber 5658b8fde722SStefan Haberland if (tsb) { 5659773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5660f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5661773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5662f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5663773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5664f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5665773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5666f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5667f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5668773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5669f3eb5384SStefan Weinhuber " residual %d\n", residual); 5670f3eb5384SStefan Weinhuber 5671f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5672f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5673773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5674f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5675f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5676773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5677f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5678f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5679773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5680f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5681f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5682773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5683f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5684f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5685773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5686f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5687f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5688f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5689f3eb5384SStefan Weinhuber break; 5690f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5691773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5692f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5693ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5694773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5695ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5696ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5697ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5698f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5699f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5700ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5701f3eb5384SStefan Weinhuber } 5702f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5703f3eb5384SStefan Weinhuber } 5704f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5705f3eb5384SStefan Weinhuber break; 5706f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5707773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 57088693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5709f3eb5384SStefan Weinhuber break; 5710f3eb5384SStefan Weinhuber } 5711f3eb5384SStefan Weinhuber 5712f3eb5384SStefan Weinhuber if (sense) { 5713f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5714773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5715f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5716f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5717f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5718f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5719f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5720f3eb5384SStefan Weinhuber } 5721f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5722f3eb5384SStefan Weinhuber } 5723f3eb5384SStefan Weinhuber 5724f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5725f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5726773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5727f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5728f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5729f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5730f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5731f3eb5384SStefan Weinhuber } else { 5732f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5733773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5734f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5735f3eb5384SStefan Weinhuber "Exception class %x\n", 5736f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5737f3eb5384SStefan Weinhuber } 5738f3eb5384SStefan Weinhuber } else { 5739773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5740f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5741f3eb5384SStefan Weinhuber } 5742f3eb5384SStefan Weinhuber } else { 5743773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5744f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5745f3eb5384SStefan Weinhuber } 5746773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5747f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5748f3eb5384SStefan Weinhuber } 5749f3eb5384SStefan Weinhuber 5750f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5751f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5752f3eb5384SStefan Weinhuber { 57538fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 57548fd57520SJan Höppner 57558fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 57568fd57520SJan Höppner /* 57578fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 57588fd57520SJan Höppner * error might be expected and log messages shouldn't be written 57598fd57520SJan Höppner * then. Check if the according suppress bit is set. 57608fd57520SJan Höppner */ 57618fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 57628fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 57638fd57520SJan Höppner return; 57648fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 57658fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 57668fd57520SJan Höppner return; 57678fd57520SJan Höppner 5768f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 57698fd57520SJan Höppner } else { 57708fd57520SJan Höppner /* 5771ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5772ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5773ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 57748fd57520SJan Höppner */ 5775ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5776ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5777ab24fbd3SStefan Haberland return; 5778ab24fbd3SStefan Haberland 57798fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 57808fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 57818fd57520SJan Höppner return; 57828fd57520SJan Höppner 5783f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5784f3eb5384SStefan Weinhuber } 57858fd57520SJan Höppner } 5786f3eb5384SStefan Weinhuber 5787501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5788501183f2SStefan Haberland { 5789543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5790501183f2SStefan Haberland int rc, old_base; 57912dedf0d9SStefan Haberland char print_uid[60]; 57922dedf0d9SStefan Haberland struct dasd_uid uid; 57932dedf0d9SStefan Haberland unsigned long flags; 5794501183f2SStefan Haberland 579559a9ed5fSStefan Haberland /* 579659a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 579759a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 579859a9ed5fSStefan Haberland */ 579959a9ed5fSStefan Haberland dasd_alias_remove_device(device); 580059a9ed5fSStefan Haberland 58012dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5802501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 58032dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 58042dedf0d9SStefan Haberland 5805501183f2SStefan Haberland /* Read Configuration Data */ 5806501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5807501183f2SStefan Haberland if (rc) 5808501183f2SStefan Haberland goto out_err; 5809501183f2SStefan Haberland 581074e2f211SStefan Haberland dasd_eckd_read_fc_security(device); 581174e2f211SStefan Haberland 58122dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5813501183f2SStefan Haberland if (rc) 5814501183f2SStefan Haberland goto out_err; 5815501183f2SStefan Haberland /* 5816501183f2SStefan Haberland * update unit address configuration and 5817501183f2SStefan Haberland * add device to alias management 5818501183f2SStefan Haberland */ 5819501183f2SStefan Haberland dasd_alias_update_add_device(device); 5820501183f2SStefan Haberland 58212dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 58222dedf0d9SStefan Haberland 58232dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 5824542e30ceSStefan Haberland dasd_eckd_get_uid_string(&private->conf, print_uid); 5825501183f2SStefan Haberland dev_info(&device->cdev->dev, 5826501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 58272dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5828501183f2SStefan Haberland } 5829501183f2SStefan Haberland return 0; 5830501183f2SStefan Haberland 5831501183f2SStefan Haberland out_err: 5832501183f2SStefan Haberland return -1; 5833501183f2SStefan Haberland } 5834501183f2SStefan Haberland 58355db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 58365db8440cSStefan Haberland struct dasd_rssd_messages *messages, 58375db8440cSStefan Haberland __u8 lpum) 58385db8440cSStefan Haberland { 58395db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 58405db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 58415db8440cSStefan Haberland struct dasd_ccw_req *cqr; 58425db8440cSStefan Haberland struct ccw1 *ccw; 58435db8440cSStefan Haberland int rc; 58445db8440cSStefan Haberland 58455db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 58465db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 58475db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5848c5205f2fSSebastian Ott device, NULL); 58495db8440cSStefan Haberland if (IS_ERR(cqr)) { 58505db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58515db8440cSStefan Haberland "Could not allocate read message buffer request"); 58525db8440cSStefan Haberland return PTR_ERR(cqr); 58535db8440cSStefan Haberland } 58545db8440cSStefan Haberland 5855af775210SStefan Haberland cqr->lpm = lpum; 5856af775210SStefan Haberland retry: 58575db8440cSStefan Haberland cqr->startdev = device; 58585db8440cSStefan Haberland cqr->memdev = device; 58595db8440cSStefan Haberland cqr->block = NULL; 58605db8440cSStefan Haberland cqr->expires = 10 * HZ; 58615db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5862b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5863b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5864b179b037SStefan Haberland * do basic erp */ 5865b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5866b179b037SStefan Haberland cqr->retries = 256; 58675db8440cSStefan Haberland 58685db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 58695db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58705db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 58715db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 58725db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 58735db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 58745db8440cSStefan Haberland 58755db8440cSStefan Haberland ccw = cqr->cpaddr; 58765db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 58775db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 58785db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 58795db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58805db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 58815db8440cSStefan Haberland 58825db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 58835db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 58845db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 58855db8440cSStefan Haberland 58865db8440cSStefan Haberland ccw++; 58875db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 58885db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 58895db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58905db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 58915db8440cSStefan Haberland 58925db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 58935db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 58945db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 58955db8440cSStefan Haberland if (rc == 0) { 58965db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58975db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 58985db8440cSStefan Haberland (prssdp + 1); 58995db8440cSStefan Haberland memcpy(messages, message_buf, 59005db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5901af775210SStefan Haberland } else if (cqr->lpm) { 5902af775210SStefan Haberland /* 5903af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5904af775210SStefan Haberland * but instead we get the required information on any path 5905af775210SStefan Haberland * so retry with open path mask 5906af775210SStefan Haberland */ 5907af775210SStefan Haberland cqr->lpm = 0; 5908af775210SStefan Haberland goto retry; 59095db8440cSStefan Haberland } else 59105db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 59115db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 59125db8440cSStefan Haberland , rc); 59135db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59145db8440cSStefan Haberland return rc; 59155db8440cSStefan Haberland } 59165db8440cSStefan Haberland 59175a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 59185a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 59195a3b7b11SStefan Haberland { 59205a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 59215a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 59225a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 59235a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 59245a3b7b11SStefan Haberland struct ccw1 *ccw; 59255a3b7b11SStefan Haberland int rc; 59265a3b7b11SStefan Haberland 59275a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 59285a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 59295a3b7b11SStefan Haberland return -EOPNOTSUPP; 59305a3b7b11SStefan Haberland 5931ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5932ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5933ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5934ccd53fa2SStefan Haberland 59355a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 59365a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5937c5205f2fSSebastian Ott device, NULL); 59385a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 59395a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59405a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 59415a3b7b11SStefan Haberland return PTR_ERR(cqr); 59425a3b7b11SStefan Haberland } 59435a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 59445a3b7b11SStefan Haberland if (!host_access) { 59455a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 59465a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59475a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 59485a3b7b11SStefan Haberland return -ENOMEM; 59495a3b7b11SStefan Haberland } 59505a3b7b11SStefan Haberland cqr->startdev = device; 59515a3b7b11SStefan Haberland cqr->memdev = device; 59525a3b7b11SStefan Haberland cqr->block = NULL; 59535a3b7b11SStefan Haberland cqr->retries = 256; 59545a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 59555a3b7b11SStefan Haberland 59565a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 59575a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59585a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 59595a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 59605a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 59615a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 5962542e30ceSStefan Haberland prssdp->lss = private->conf.ned->ID; 5963542e30ceSStefan Haberland prssdp->volume = private->conf.ned->unit_addr; 59645a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 59655a3b7b11SStefan Haberland 59665a3b7b11SStefan Haberland ccw = cqr->cpaddr; 59675a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59685a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 59695a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 59705a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59715a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 59725a3b7b11SStefan Haberland 59735a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 59745a3b7b11SStefan Haberland ccw++; 59755a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 59765a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 59775a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59785a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 59795a3b7b11SStefan Haberland 59805a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 59815a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5982ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5983ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5984f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 59855a3b7b11SStefan Haberland if (rc == 0) { 59865a3b7b11SStefan Haberland *data = *host_access; 59875a3b7b11SStefan Haberland } else { 59885a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 59895a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 59905a3b7b11SStefan Haberland rc); 59915a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 59925a3b7b11SStefan Haberland } 59935a3b7b11SStefan Haberland 59945a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59955a3b7b11SStefan Haberland kfree(host_access); 59965a3b7b11SStefan Haberland return rc; 59975a3b7b11SStefan Haberland } 59985a3b7b11SStefan Haberland /* 59995a3b7b11SStefan Haberland * return number of grouped devices 60005a3b7b11SStefan Haberland */ 60015a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 60025a3b7b11SStefan Haberland { 60035a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60045a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60055a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60065a3b7b11SStefan Haberland int count = 0; 60075a3b7b11SStefan Haberland int rc, i; 60085a3b7b11SStefan Haberland 60095a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60105a3b7b11SStefan Haberland if (!access) { 60115a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60125a3b7b11SStefan Haberland "Could not allocate access buffer"); 60135a3b7b11SStefan Haberland return -ENOMEM; 60145a3b7b11SStefan Haberland } 60155a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60165a3b7b11SStefan Haberland if (rc) { 60175a3b7b11SStefan Haberland kfree(access); 60185a3b7b11SStefan Haberland return rc; 60195a3b7b11SStefan Haberland } 60205a3b7b11SStefan Haberland 60215a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60225a3b7b11SStefan Haberland access->host_access_information; 60235a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 60245a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 60255a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 60265a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 60275a3b7b11SStefan Haberland count++; 60285a3b7b11SStefan Haberland } 60295a3b7b11SStefan Haberland 60305a3b7b11SStefan Haberland kfree(access); 60315a3b7b11SStefan Haberland return count; 60325a3b7b11SStefan Haberland } 60335a3b7b11SStefan Haberland 60345a3b7b11SStefan Haberland /* 60355a3b7b11SStefan Haberland * write host access information to a sequential file 60365a3b7b11SStefan Haberland */ 60375a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 60385a3b7b11SStefan Haberland { 60395a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60405a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60415a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60425a3b7b11SStefan Haberland char sysplex[9] = ""; 6043c7848e14SChristophe JAILLET int rc, i; 60445a3b7b11SStefan Haberland 60455a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60465a3b7b11SStefan Haberland if (!access) { 60475a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60485a3b7b11SStefan Haberland "Could not allocate access buffer"); 60495a3b7b11SStefan Haberland return -ENOMEM; 60505a3b7b11SStefan Haberland } 60515a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60525a3b7b11SStefan Haberland if (rc) { 60535a3b7b11SStefan Haberland kfree(access); 60545a3b7b11SStefan Haberland return rc; 60555a3b7b11SStefan Haberland } 60565a3b7b11SStefan Haberland 60575a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60585a3b7b11SStefan Haberland access->host_access_information; 60595a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 60605a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 60615a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 60625a3b7b11SStefan Haberland /* PGID */ 6063c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 60645a3b7b11SStefan Haberland /* FLAGS */ 60655a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 60665a3b7b11SStefan Haberland /* SYSPLEX NAME */ 60675a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 60685a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 60695a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 60705a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 60715a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 60725a3b7b11SStefan Haberland /* TIMESTAMP */ 60735a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 60745a3b7b11SStefan Haberland entry->timestamp); 60755a3b7b11SStefan Haberland } 60765a3b7b11SStefan Haberland kfree(access); 60775a3b7b11SStefan Haberland 60785a3b7b11SStefan Haberland return 0; 60795a3b7b11SStefan Haberland } 60805a3b7b11SStefan Haberland 60815db8440cSStefan Haberland /* 60825db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 60835db8440cSStefan Haberland */ 60845db8440cSStefan Haberland static int 60855db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6086a521b048SStefan Haberland __u32 message_id, __u8 lpum) 60875db8440cSStefan Haberland { 60885db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 6089a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 60905db8440cSStefan Haberland struct dasd_ccw_req *cqr; 60915db8440cSStefan Haberland struct ccw1 *ccw; 60925db8440cSStefan Haberland int rc; 60935db8440cSStefan Haberland 60945db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 60955db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 6096c5205f2fSSebastian Ott device, NULL); 60975db8440cSStefan Haberland 60985db8440cSStefan Haberland if (IS_ERR(cqr)) { 60995db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 61005db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 61015db8440cSStefan Haberland return PTR_ERR(cqr); 61025db8440cSStefan Haberland } 61035db8440cSStefan Haberland 61045db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 61055db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 61065db8440cSStefan Haberland psf_cuir->cc = response; 6107a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 61085db8440cSStefan Haberland psf_cuir->message_id = message_id; 6109a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 6110a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 61115db8440cSStefan Haberland ccw = cqr->cpaddr; 61125db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 61135db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 6114b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 61155db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 61165db8440cSStefan Haberland 61175db8440cSStefan Haberland cqr->startdev = device; 61185db8440cSStefan Haberland cqr->memdev = device; 61195db8440cSStefan Haberland cqr->block = NULL; 61205db8440cSStefan Haberland cqr->retries = 256; 61215db8440cSStefan Haberland cqr->expires = 10*HZ; 61225db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 61235db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 6124b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 61255db8440cSStefan Haberland 61265db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 61275db8440cSStefan Haberland 61285db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 61295db8440cSStefan Haberland return rc; 61305db8440cSStefan Haberland } 61315db8440cSStefan Haberland 6132b179b037SStefan Haberland /* 6133b179b037SStefan Haberland * return configuration data that is referenced by record selector 6134b179b037SStefan Haberland * if a record selector is specified or per default return the 6135b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 6136b179b037SStefan Haberland */ 6137b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6138b179b037SStefan Haberland __u8 lpum, 6139b179b037SStefan Haberland struct dasd_cuir_message *cuir) 61405db8440cSStefan Haberland { 6141b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6142b179b037SStefan Haberland int path, pos; 61435db8440cSStefan Haberland 6144b179b037SStefan Haberland if (cuir->record_selector == 0) 6145b179b037SStefan Haberland goto out; 6146b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6147c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 6148b179b037SStefan Haberland if (conf_data->gneq.record_selector == 6149b179b037SStefan Haberland cuir->record_selector) 6150b179b037SStefan Haberland return conf_data; 61515db8440cSStefan Haberland } 6152b179b037SStefan Haberland out: 6153c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 61545db8440cSStefan Haberland } 61555db8440cSStefan Haberland 61565db8440cSStefan Haberland /* 6157b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6158b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6159b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6160b179b037SStefan Haberland * 6161b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6162b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6163b179b037SStefan Haberland * on. 6164b179b037SStefan Haberland */ 6165b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6166b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6167b179b037SStefan Haberland { 6168b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6169b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6170b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6171b179b037SStefan Haberland unsigned int pos, path; 6172b179b037SStefan Haberland char *ref_gneq, *gneq; 6173b179b037SStefan Haberland char *ref_ned, *ned; 6174b179b037SStefan Haberland int tbcpm = 0; 6175b179b037SStefan Haberland 6176b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6177b179b037SStefan Haberland the attention message was presented on */ 6178b179b037SStefan Haberland if (!cuir->ned_map || 6179b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6180b179b037SStefan Haberland return lpum; 6181b179b037SStefan Haberland 6182b179b037SStefan Haberland /* get reference conf data */ 6183b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6184b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6185b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6186b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6187b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6188b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6189b179b037SStefan Haberland mask = cuir->neq_map[2]; 6190b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6191b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6192b179b037SStefan Haberland 6193c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6194b179b037SStefan Haberland /* initialise data per path */ 6195b179b037SStefan Haberland bitmask = mask; 6196c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6197b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6198b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6199b179b037SStefan Haberland /* compare reference ned and per path ned */ 6200b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6201b179b037SStefan Haberland continue; 6202b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6203b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6204b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6205b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6206b179b037SStefan Haberland while (bitmask) { 6207b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6208b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6209b179b037SStefan Haberland != 0) 6210b179b037SStefan Haberland break; 6211b179b037SStefan Haberland clear_bit(pos, &bitmask); 6212b179b037SStefan Haberland } 6213b179b037SStefan Haberland if (bitmask) 6214b179b037SStefan Haberland continue; 6215b179b037SStefan Haberland /* device and path match the reference values 6216b179b037SStefan Haberland add path to CUIR scope */ 6217c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6218b179b037SStefan Haberland } 6219b179b037SStefan Haberland return tbcpm; 6220b179b037SStefan Haberland } 6221b179b037SStefan Haberland 6222b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6223a521b048SStefan Haberland unsigned long paths, int action) 6224b179b037SStefan Haberland { 6225b179b037SStefan Haberland int pos; 6226b179b037SStefan Haberland 6227b179b037SStefan Haberland while (paths) { 6228b179b037SStefan Haberland /* get position of bit in mask */ 6229a521b048SStefan Haberland pos = 8 - ffs(paths); 6230b179b037SStefan Haberland /* get channel path descriptor from this position */ 6231b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6232a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6233a521b048SStefan Haberland device->path[pos].cssid, 6234a521b048SStefan Haberland device->path[pos].chpid); 6235b179b037SStefan Haberland else if (action == CUIR_RESUME) 6236a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6237a521b048SStefan Haberland device->path[pos].cssid, 6238a521b048SStefan Haberland device->path[pos].chpid); 6239a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6240b179b037SStefan Haberland } 6241b179b037SStefan Haberland } 6242b179b037SStefan Haberland 6243b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6244b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6245b179b037SStefan Haberland { 6246b179b037SStefan Haberland unsigned long tbcpm; 6247b179b037SStefan Haberland 6248b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6249b179b037SStefan Haberland /* nothing to do if path is not in use */ 6250c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6251b179b037SStefan Haberland return 0; 6252c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6253b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6254b179b037SStefan Haberland return error */ 6255b179b037SStefan Haberland return -EINVAL; 6256b179b037SStefan Haberland } 6257b179b037SStefan Haberland /* remove device from operational path mask */ 6258c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6259c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6260b179b037SStefan Haberland return tbcpm; 6261b179b037SStefan Haberland } 6262b179b037SStefan Haberland 6263b179b037SStefan Haberland /* 6264b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6265b179b037SStefan Haberland * return an error if the last path to a device would be removed 62665db8440cSStefan Haberland * 62675db8440cSStefan Haberland * if only part of the devices are quiesced and an error 62685db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 62695db8440cSStefan Haberland * notify the already set offline devices again 62705db8440cSStefan Haberland */ 62715db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6272b179b037SStefan Haberland struct dasd_cuir_message *cuir) 62735db8440cSStefan Haberland { 6274543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 62755db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 62765db8440cSStefan Haberland struct dasd_device *dev, *n; 6277b179b037SStefan Haberland unsigned long paths = 0; 6278b179b037SStefan Haberland unsigned long flags; 6279b179b037SStefan Haberland int tbcpm; 62805db8440cSStefan Haberland 62815db8440cSStefan Haberland /* active devices */ 6282b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 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(get_ccwdev_lock(dev->cdev), flags); 6287b179b037SStefan Haberland if (tbcpm < 0) 6288b179b037SStefan Haberland goto out_err; 6289b179b037SStefan Haberland paths |= tbcpm; 62905db8440cSStefan Haberland } 62915db8440cSStefan Haberland /* inactive devices */ 6292b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 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(get_ccwdev_lock(dev->cdev), flags); 6297b179b037SStefan Haberland if (tbcpm < 0) 6298b179b037SStefan Haberland goto out_err; 6299b179b037SStefan Haberland paths |= tbcpm; 63005db8440cSStefan Haberland } 63015db8440cSStefan Haberland /* devices in PAV groups */ 63025db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 63035db8440cSStefan Haberland &private->lcu->grouplist, group) { 63045db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 63055db8440cSStefan Haberland alias_list) { 6306b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6307b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6308b179b037SStefan Haberland spin_unlock_irqrestore( 6309b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6310b179b037SStefan Haberland if (tbcpm < 0) 6311b179b037SStefan Haberland goto out_err; 6312b179b037SStefan Haberland paths |= tbcpm; 63135db8440cSStefan Haberland } 63145db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 63155db8440cSStefan Haberland alias_list) { 6316b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6317b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6318b179b037SStefan Haberland spin_unlock_irqrestore( 6319b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6320b179b037SStefan Haberland if (tbcpm < 0) 6321b179b037SStefan Haberland goto out_err; 6322b179b037SStefan Haberland paths |= tbcpm; 63235db8440cSStefan Haberland } 63245db8440cSStefan Haberland } 6325b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6326a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6327b179b037SStefan Haberland return 0; 6328b179b037SStefan Haberland out_err: 6329b179b037SStefan Haberland return tbcpm; 63305db8440cSStefan Haberland } 63315db8440cSStefan Haberland 63325db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6333b179b037SStefan Haberland struct dasd_cuir_message *cuir) 63345db8440cSStefan Haberland { 6335543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 63365db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 63375db8440cSStefan Haberland struct dasd_device *dev, *n; 6338b179b037SStefan Haberland unsigned long paths = 0; 6339b179b037SStefan Haberland int tbcpm; 63405db8440cSStefan Haberland 63415db8440cSStefan Haberland /* 63425db8440cSStefan Haberland * the path may have been added through a generic path event before 63435db8440cSStefan Haberland * only trigger path verification if the path is not already in use 63445db8440cSStefan Haberland */ 63455db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63465db8440cSStefan Haberland &private->lcu->active_devices, 63475db8440cSStefan Haberland alias_list) { 6348b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6349b179b037SStefan Haberland paths |= tbcpm; 6350c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6351c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63525db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63535db8440cSStefan Haberland } 63545db8440cSStefan Haberland } 63555db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63565db8440cSStefan Haberland &private->lcu->inactive_devices, 63575db8440cSStefan Haberland alias_list) { 6358b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6359b179b037SStefan Haberland paths |= tbcpm; 6360c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6361c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63625db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63635db8440cSStefan Haberland } 63645db8440cSStefan Haberland } 63655db8440cSStefan Haberland /* devices in PAV groups */ 63665db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 63675db8440cSStefan Haberland &private->lcu->grouplist, 63685db8440cSStefan Haberland group) { 63695db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63705db8440cSStefan Haberland &pavgroup->baselist, 63715db8440cSStefan Haberland alias_list) { 6372b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6373b179b037SStefan Haberland paths |= tbcpm; 6374c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6375c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63765db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63775db8440cSStefan Haberland } 63785db8440cSStefan Haberland } 63795db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63805db8440cSStefan Haberland &pavgroup->aliaslist, 63815db8440cSStefan Haberland alias_list) { 6382b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6383b179b037SStefan Haberland paths |= tbcpm; 6384c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6385c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63865db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63875db8440cSStefan Haberland } 63885db8440cSStefan Haberland } 63895db8440cSStefan Haberland } 6390b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6391a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6392b179b037SStefan Haberland return 0; 63935db8440cSStefan Haberland } 63945db8440cSStefan Haberland 63955db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 63965db8440cSStefan Haberland __u8 lpum) 63975db8440cSStefan Haberland { 63985db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6399a521b048SStefan Haberland int response; 64005db8440cSStefan Haberland 6401b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6402b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6403b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6404b179b037SStefan Haberland ((u32 *)cuir)[3]); 64055db8440cSStefan Haberland 64065db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 64075db8440cSStefan Haberland /* quiesce */ 6408a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6409b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6410b179b037SStefan Haberland else 6411b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 64125db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 64135db8440cSStefan Haberland /* resume */ 6414a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6415b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 64165db8440cSStefan Haberland } else 64175db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 64185db8440cSStefan Haberland 6419b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6420a521b048SStefan Haberland cuir->message_id, lpum); 6421b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6422b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6423b179b037SStefan Haberland cuir->message_id); 6424b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6425b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 64265db8440cSStefan Haberland } 64275db8440cSStefan Haberland 64289e12e54cSJan Höppner static void dasd_eckd_oos_resume(struct dasd_device *device) 64299e12e54cSJan Höppner { 64309e12e54cSJan Höppner struct dasd_eckd_private *private = device->private; 64319e12e54cSJan Höppner struct alias_pav_group *pavgroup, *tempgroup; 64329e12e54cSJan Höppner struct dasd_device *dev, *n; 64339e12e54cSJan Höppner unsigned long flags; 64349e12e54cSJan Höppner 64359e12e54cSJan Höppner spin_lock_irqsave(&private->lcu->lock, flags); 64369e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 64379e12e54cSJan Höppner alias_list) { 64389e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64399e12e54cSJan Höppner dasd_generic_space_avail(dev); 64409e12e54cSJan Höppner } 64419e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 64429e12e54cSJan Höppner alias_list) { 64439e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64449e12e54cSJan Höppner dasd_generic_space_avail(dev); 64459e12e54cSJan Höppner } 64469e12e54cSJan Höppner /* devices in PAV groups */ 64479e12e54cSJan Höppner list_for_each_entry_safe(pavgroup, tempgroup, 64489e12e54cSJan Höppner &private->lcu->grouplist, 64499e12e54cSJan Höppner group) { 64509e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->baselist, 64519e12e54cSJan Höppner alias_list) { 64529e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64539e12e54cSJan Höppner dasd_generic_space_avail(dev); 64549e12e54cSJan Höppner } 64559e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 64569e12e54cSJan Höppner alias_list) { 64579e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64589e12e54cSJan Höppner dasd_generic_space_avail(dev); 64599e12e54cSJan Höppner } 64609e12e54cSJan Höppner } 64619e12e54cSJan Höppner spin_unlock_irqrestore(&private->lcu->lock, flags); 64629e12e54cSJan Höppner } 64639e12e54cSJan Höppner 64649e12e54cSJan Höppner static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 64659e12e54cSJan Höppner __u8 lpum) 64669e12e54cSJan Höppner { 64679e12e54cSJan Höppner struct dasd_oos_message *oos = messages; 64689e12e54cSJan Höppner 64699e12e54cSJan Höppner switch (oos->code) { 64709e12e54cSJan Höppner case REPO_WARN: 64719e12e54cSJan Höppner case POOL_WARN: 64729e12e54cSJan Höppner dev_warn(&device->cdev->dev, 64739e12e54cSJan Höppner "Extent pool usage has reached a critical value\n"); 64749e12e54cSJan Höppner dasd_eckd_oos_resume(device); 64759e12e54cSJan Höppner break; 64769e12e54cSJan Höppner case REPO_EXHAUST: 64779e12e54cSJan Höppner case POOL_EXHAUST: 64789e12e54cSJan Höppner dev_warn(&device->cdev->dev, 64799e12e54cSJan Höppner "Extent pool is exhausted\n"); 64809e12e54cSJan Höppner break; 64819e12e54cSJan Höppner case REPO_RELIEVE: 64829e12e54cSJan Höppner case POOL_RELIEVE: 64839e12e54cSJan Höppner dev_info(&device->cdev->dev, 64849e12e54cSJan Höppner "Extent pool physical space constraint has been relieved\n"); 64859e12e54cSJan Höppner break; 64869e12e54cSJan Höppner } 64879e12e54cSJan Höppner 64889e12e54cSJan Höppner /* In any case, update related data */ 64899e12e54cSJan Höppner dasd_eckd_read_ext_pool_info(device); 64909e12e54cSJan Höppner 64919e12e54cSJan Höppner /* to make sure there is no attention left schedule work again */ 64929e12e54cSJan Höppner device->discipline->check_attention(device, lpum); 64939e12e54cSJan Höppner } 64949e12e54cSJan Höppner 64955db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 64965db8440cSStefan Haberland { 64975db8440cSStefan Haberland struct check_attention_work_data *data; 64985db8440cSStefan Haberland struct dasd_rssd_messages *messages; 64995db8440cSStefan Haberland struct dasd_device *device; 65005db8440cSStefan Haberland int rc; 65015db8440cSStefan Haberland 65025db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 65035db8440cSStefan Haberland device = data->device; 65045db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 65055db8440cSStefan Haberland if (!messages) { 65065db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 65075db8440cSStefan Haberland "Could not allocate attention message buffer"); 65085db8440cSStefan Haberland goto out; 65095db8440cSStefan Haberland } 65105db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 65115db8440cSStefan Haberland if (rc) 65125db8440cSStefan Haberland goto out; 65139e12e54cSJan Höppner 65145db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 65155db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 65165db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 65179e12e54cSJan Höppner if (messages->length == ATTENTION_LENGTH_OOS && 65189e12e54cSJan Höppner messages->format == ATTENTION_FORMAT_OOS) 65199e12e54cSJan Höppner dasd_eckd_handle_oos(device, messages, data->lpum); 65209e12e54cSJan Höppner 65215db8440cSStefan Haberland out: 65225db8440cSStefan Haberland dasd_put_device(device); 65235db8440cSStefan Haberland kfree(messages); 65245db8440cSStefan Haberland kfree(data); 65255db8440cSStefan Haberland } 65265db8440cSStefan Haberland 65275db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 65285db8440cSStefan Haberland { 65295db8440cSStefan Haberland struct check_attention_work_data *data; 65305db8440cSStefan Haberland 65315db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 65325db8440cSStefan Haberland if (!data) 65335db8440cSStefan Haberland return -ENOMEM; 65345db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 65355db8440cSStefan Haberland dasd_get_device(device); 65365db8440cSStefan Haberland data->device = device; 65375db8440cSStefan Haberland data->lpum = lpum; 65385db8440cSStefan Haberland schedule_work(&data->worker); 65395db8440cSStefan Haberland return 0; 65405db8440cSStefan Haberland } 65415db8440cSStefan Haberland 6542a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6543a521b048SStefan Haberland { 6544a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6545a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6546a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6547a521b048SStefan Haberland dev_err(&device->cdev->dev, 6548a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6549a521b048SStefan Haberland lpum); 6550a521b048SStefan Haberland return 1; 6551a521b048SStefan Haberland } 6552a521b048SStefan Haberland return 0; 6553a521b048SStefan Haberland } 6554a521b048SStefan Haberland 6555a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6556a521b048SStefan Haberland { 6557a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6558a521b048SStefan Haberland 6559a521b048SStefan Haberland dev_err(&device->cdev->dev, 6560a521b048SStefan Haberland "High Performance FICON disabled\n"); 6561a521b048SStefan Haberland private->fcx_max_data = 0; 6562a521b048SStefan Haberland } 6563a521b048SStefan Haberland 6564a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6565a521b048SStefan Haberland { 6566a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6567a521b048SStefan Haberland 6568a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6569a521b048SStefan Haberland } 6570a521b048SStefan Haberland 6571a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6572a521b048SStefan Haberland struct irb *irb) 6573a521b048SStefan Haberland { 6574a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6575a521b048SStefan Haberland 6576a521b048SStefan Haberland if (!private->fcx_max_data) { 6577a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6578a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6579a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6580a521b048SStefan Haberland return; 6581a521b048SStefan Haberland } 6582a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6583a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6584a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6585a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6586a521b048SStefan Haberland return; 6587a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6588a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6589a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6590a521b048SStefan Haberland } 6591a521b048SStefan Haberland /* 6592a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6593a521b048SStefan Haberland * requeue of existing requests 6594a521b048SStefan Haberland */ 6595a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6596a521b048SStefan Haberland dasd_schedule_requeue(device); 6597a521b048SStefan Haberland } 6598a521b048SStefan Haberland 6599a0610a8aSJan Höppner /* 6600a0610a8aSJan Höppner * Initialize block layer request queue. 6601a0610a8aSJan Höppner */ 6602a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6603a0610a8aSJan Höppner { 6604a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6605a0610a8aSJan Höppner struct request_queue *q = block->request_queue; 6606a0610a8aSJan Höppner struct dasd_device *device = block->base; 6607a0610a8aSJan Höppner int max; 6608a0610a8aSJan Höppner 6609a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6610a0610a8aSJan Höppner /* 6611a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6612a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6613a0610a8aSJan Höppner * only need one ccw per track 6614a0610a8aSJan Höppner * so the max_hw_sectors are 6615a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6616a0610a8aSJan Höppner */ 6617a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6618a0610a8aSJan Höppner } else { 6619a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6620a0610a8aSJan Höppner } 6621a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6622a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6623a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6624a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6625a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6626a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6627a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6628a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6629*bc792884SEric Farman blk_queue_dma_alignment(q, PAGE_SIZE - 1); 6630a0610a8aSJan Höppner } 6631a0610a8aSJan Höppner 6632d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 66333bda058bSSebastian Ott .driver = { 6634d41dd122SStefan Haberland .name = "dasd-eckd", 6635d41dd122SStefan Haberland .owner = THIS_MODULE, 66361987c551SJulian Wiedmann .dev_groups = dasd_dev_groups, 66373bda058bSSebastian Ott }, 6638d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6639d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6640d41dd122SStefan Haberland .remove = dasd_generic_remove, 6641d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6642d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6643d41dd122SStefan Haberland .notify = dasd_generic_notify, 6644a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 66454679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6646a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6647420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6648d41dd122SStefan Haberland }; 6649f3eb5384SStefan Weinhuber 66501da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 66511da177e4SLinus Torvalds .owner = THIS_MODULE, 66521da177e4SLinus Torvalds .name = "ECKD", 66531da177e4SLinus Torvalds .ebcname = "ECKD", 66541da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 66558e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 66561da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6657b7294932SJan Höppner .pe_handler = dasd_eckd_pe_handler, 6658d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 66598e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6660daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6661a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 66621da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 66631da177e4SLinus Torvalds .start_IO = dasd_start_IO, 66641da177e4SLinus Torvalds .term_IO = dasd_term_IO, 66658e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 66661da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 66678fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 66681da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 66691da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 66705a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 66718e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 66728e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 66731da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6674fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 66751da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 66761107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6677501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 66782dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6679f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 66805db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 66815a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 66825a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6683a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6684a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6685a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6686a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6687c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6688c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6689c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6690c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 669191dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6692c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6693c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6694c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6695c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6696c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 66979e12e54cSJan Höppner .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 66985e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 66995e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 67001da177e4SLinus Torvalds }; 67011da177e4SLinus Torvalds 67021da177e4SLinus Torvalds static int __init 67031da177e4SLinus Torvalds dasd_eckd_init(void) 67041da177e4SLinus Torvalds { 6705736e6ea0SSebastian Ott int ret; 6706736e6ea0SSebastian Ott 67071da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6708f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6709f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6710f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6711f932bceaSStefan Weinhuber return -ENOMEM; 67129e12e54cSJan Höppner dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 67139e12e54cSJan Höppner GFP_KERNEL | GFP_DMA); 67149e12e54cSJan Höppner if (!dasd_vol_info_req) 67159e12e54cSJan Höppner return -ENOMEM; 6716b7294932SJan Höppner pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), 6717a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6718b7294932SJan Höppner if (!pe_handler_worker) { 6719a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 67209e12e54cSJan Höppner kfree(dasd_vol_info_req); 6721a4d26c6aSStefan Weinhuber return -ENOMEM; 6722a4d26c6aSStefan Weinhuber } 6723558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6724558b9ef0SStefan Weinhuber if (!rawpadpage) { 6725b7294932SJan Höppner kfree(pe_handler_worker); 6726558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 67279e12e54cSJan Höppner kfree(dasd_vol_info_req); 6728558b9ef0SStefan Weinhuber return -ENOMEM; 6729558b9ef0SStefan Weinhuber } 6730736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6731736e6ea0SSebastian Ott if (!ret) 6732736e6ea0SSebastian Ott wait_for_device_probe(); 6733a4d26c6aSStefan Weinhuber else { 6734b7294932SJan Höppner kfree(pe_handler_worker); 6735f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 67369e12e54cSJan Höppner kfree(dasd_vol_info_req); 6737558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6738a4d26c6aSStefan Weinhuber } 6739736e6ea0SSebastian Ott return ret; 67401da177e4SLinus Torvalds } 67411da177e4SLinus Torvalds 67421da177e4SLinus Torvalds static void __exit 67431da177e4SLinus Torvalds dasd_eckd_cleanup(void) 67441da177e4SLinus Torvalds { 67451da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6746b7294932SJan Höppner kfree(pe_handler_worker); 6747f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6748558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 67491da177e4SLinus Torvalds } 67501da177e4SLinus Torvalds 67511da177e4SLinus Torvalds module_init(dasd_eckd_init); 67521da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6753