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 */ 106a4d26c6aSStefan Weinhuber struct path_verification_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; 114a4d26c6aSStefan Weinhuber }; 115a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 116a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 117eb6e199bSStefan Weinhuber 1185db8440cSStefan Haberland struct check_attention_work_data { 1195db8440cSStefan Haberland struct work_struct worker; 1205db8440cSStefan Haberland struct dasd_device *device; 1215db8440cSStefan Haberland __u8 lpum; 1225db8440cSStefan Haberland }; 1235db8440cSStefan Haberland 124c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *); 1258fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1268fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1278fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1288fd57520SJan Höppner unsigned int, unsigned int); 1298fd57520SJan Höppner 1301da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1311da177e4SLinus Torvalds * the other detection code is gone */ 1321da177e4SLinus Torvalds static int 1331da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds int ret; 1361da177e4SLinus Torvalds 13740545573SHorst Hummel /* set ECKD specific ccw-device options */ 138454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 139454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 14040545573SHorst Hummel if (ret) { 141b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 142b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 143b8ed5dd5SStefan Haberland "ccw-device options"); 1441da177e4SLinus Torvalds return ret; 14540545573SHorst Hummel } 146*e03c5941SJan Höppner ret = dasd_generic_probe(cdev); 14740545573SHorst Hummel return ret; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds static int 1511da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1571da177e4SLinus Torvalds #define LABEL_SIZE 140 1581da177e4SLinus Torvalds 1593bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 160ce6915f5SJan Höppner static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 1613bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1623bc9fef9SStefan Haberland 1631da177e4SLinus Torvalds static inline unsigned int 1641da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1651da177e4SLinus Torvalds { 1661da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1694d284cacSHeiko Carstens static unsigned int 1701da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1711da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1721da177e4SLinus Torvalds { 1731da177e4SLinus Torvalds int dn, kn; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds switch (rdc->dev_type) { 1761da177e4SLinus Torvalds case 0x3380: 1771da177e4SLinus Torvalds if (kl) 1781da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1791da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1801da177e4SLinus Torvalds else 1811da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1821da177e4SLinus Torvalds case 0x3390: 1831da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1841da177e4SLinus Torvalds if (kl) { 1851da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1861da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1871da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1881da177e4SLinus Torvalds } else 1891da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1901da177e4SLinus Torvalds case 0x9345: 1911da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1921da177e4SLinus Torvalds if (kl) { 1931da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1941da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1951da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1961da177e4SLinus Torvalds } else 1971da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds return 0; 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 202b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 203b44b0ab3SStefan Weinhuber { 204b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 205b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 206b44b0ab3SStefan Weinhuber geo->head <<= 4; 207b44b0ab3SStefan Weinhuber geo->head |= head; 208b44b0ab3SStefan Weinhuber } 209b44b0ab3SStefan Weinhuber 2105e6bdd37SStefan Haberland /* 2115e6bdd37SStefan Haberland * calculate failing track from sense data depending if 2125e6bdd37SStefan Haberland * it is an EAV device or not 2135e6bdd37SStefan Haberland */ 2145e6bdd37SStefan Haberland static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, 2155e6bdd37SStefan Haberland sector_t *track) 2165e6bdd37SStefan Haberland { 2175e6bdd37SStefan Haberland struct dasd_eckd_private *private = device->private; 2185e6bdd37SStefan Haberland u8 *sense = NULL; 2195e6bdd37SStefan Haberland u32 cyl; 2205e6bdd37SStefan Haberland u8 head; 2215e6bdd37SStefan Haberland 2225e6bdd37SStefan Haberland sense = dasd_get_sense(irb); 2235e6bdd37SStefan Haberland if (!sense) { 2245e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2255e6bdd37SStefan Haberland "ESE error no sense data\n"); 2265e6bdd37SStefan Haberland return -EINVAL; 2275e6bdd37SStefan Haberland } 2285e6bdd37SStefan Haberland if (!(sense[27] & DASD_SENSE_BIT_2)) { 2295e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2305e6bdd37SStefan Haberland "ESE error no valid track data\n"); 2315e6bdd37SStefan Haberland return -EINVAL; 2325e6bdd37SStefan Haberland } 2335e6bdd37SStefan Haberland 2345e6bdd37SStefan Haberland if (sense[27] & DASD_SENSE_BIT_3) { 2355e6bdd37SStefan Haberland /* enhanced addressing */ 2365e6bdd37SStefan Haberland cyl = sense[30] << 20; 2375e6bdd37SStefan Haberland cyl |= (sense[31] & 0xF0) << 12; 2385e6bdd37SStefan Haberland cyl |= sense[28] << 8; 2395e6bdd37SStefan Haberland cyl |= sense[29]; 2405e6bdd37SStefan Haberland } else { 2415e6bdd37SStefan Haberland cyl = sense[29] << 8; 2425e6bdd37SStefan Haberland cyl |= sense[30]; 2435e6bdd37SStefan Haberland } 2445e6bdd37SStefan Haberland head = sense[31] & 0x0F; 2455e6bdd37SStefan Haberland *track = cyl * private->rdc_data.trk_per_cyl + head; 2465e6bdd37SStefan Haberland return 0; 2475e6bdd37SStefan Haberland } 2485e6bdd37SStefan Haberland 2495628683cSStefan Haberland static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 2501da177e4SLinus Torvalds struct dasd_device *device) 2511da177e4SLinus Torvalds { 252543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 253d54853efSMartin Schwidefsky int rc; 2541da177e4SLinus Torvalds 2555628683cSStefan Haberland rc = get_phys_clock(&data->ep_sys_time); 2565628683cSStefan Haberland /* 2575628683cSStefan Haberland * Ignore return code if XRC is not supported or 2585628683cSStefan Haberland * sync clock is switched off 2595628683cSStefan Haberland */ 2605628683cSStefan Haberland if ((rc && !private->rdc_data.facilities.XRC_supported) || 2615628683cSStefan Haberland rc == -EOPNOTSUPP || rc == -EACCES) 262d54853efSMartin Schwidefsky return 0; 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2651da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2661da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2671da177e4SLinus Torvalds 26845f186beSJan Höppner if (ccw) { 26945f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 27045f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 27145f186beSJan Höppner } 27245f186beSJan Höppner 273d54853efSMartin Schwidefsky return rc; 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2764d284cacSHeiko Carstens static int 277b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 27845f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 27945f186beSJan Höppner int blksize) 2801da177e4SLinus Torvalds { 281543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 282b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 28345f186beSJan Höppner u32 begcyl, endcyl; 284d54853efSMartin Schwidefsky int rc = 0; 2851da177e4SLinus Torvalds 28645f186beSJan Höppner if (ccw) { 2871da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2881da177e4SLinus Torvalds ccw->flags = 0; 2891da177e4SLinus Torvalds ccw->count = 16; 2901da177e4SLinus Torvalds ccw->cda = (__u32)__pa(data); 29145f186beSJan Höppner } 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2941da177e4SLinus Torvalds switch (cmd) { 2951da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2961da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2971da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2981da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2991da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 3001da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 3011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 3021da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 3031da177e4SLinus Torvalds data->mask.perm = 0x1; 3041da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 3051da177e4SLinus Torvalds break; 3068fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 3078fd57520SJan Höppner data->mask.perm = 0x1; 3088fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 3098fd57520SJan Höppner break; 31045f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 31145f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 31245f186beSJan Höppner data->mask.perm = 0x1; 31345f186beSJan Höppner data->attributes.operation = private->attrib.operation; 31445f186beSJan Höppner data->blk_size = 0; 31545f186beSJan Höppner break; 3161da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 3171da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 3181da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 3191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 3201da177e4SLinus Torvalds data->mask.perm = 0x02; 3211da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 3225628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3231da177e4SLinus Torvalds break; 3241da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 3251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 3261da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3275628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3281da177e4SLinus Torvalds break; 3291da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 3301da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3311da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3321da177e4SLinus Torvalds data->mask.perm = 0x3; 3331da177e4SLinus Torvalds data->mask.auth = 0x1; 3341da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3355628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3361da177e4SLinus Torvalds break; 33745f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 33845f186beSJan Höppner data->mask.perm = 0x03; 33945f186beSJan Höppner data->attributes.operation = private->attrib.operation; 34045f186beSJan Höppner data->blk_size = 0; 34145f186beSJan Höppner break; 34245f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 34345f186beSJan Höppner data->mask.perm = 0x02; 34445f186beSJan Höppner data->attributes.operation = private->attrib.operation; 34545f186beSJan Höppner data->blk_size = blksize; 3465628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 34745f186beSJan Höppner break; 3481da177e4SLinus Torvalds default: 349fc19f381SStefan Haberland dev_err(&device->cdev->dev, 350fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 3511da177e4SLinus Torvalds break; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3571da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3581da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3591da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3601da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3611da177e4SLinus Torvalds 362b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 363b44b0ab3SStefan Weinhuber begcyl = trk / heads; 364b44b0ab3SStefan Weinhuber beghead = trk % heads; 365b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 366b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3691da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3701da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3711da177e4SLinus Torvalds 372b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 373b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3741da177e4SLinus Torvalds else 375b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3761da177e4SLinus Torvalds } 3771da177e4SLinus Torvalds 378b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 379b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 380d54853efSMartin Schwidefsky return rc; 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 3838e09f215SStefan Weinhuber 38445f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 38545f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 38645f186beSJan Höppner int count, int cmd, struct dasd_device *device, 38745f186beSJan Höppner unsigned int reclen, unsigned int tlf) 388f3eb5384SStefan Weinhuber { 389543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 390f3eb5384SStefan Weinhuber int sector; 391f3eb5384SStefan Weinhuber int dn, d; 392f3eb5384SStefan Weinhuber 39345f186beSJan Höppner if (ccw) { 39445f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 39545f186beSJan Höppner ccw->flags = 0; 39645f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 39745f186beSJan Höppner ccw->count = 22; 39845f186beSJan Höppner else 39945f186beSJan Höppner ccw->count = 20; 40045f186beSJan Höppner ccw->cda = (__u32)__pa(data); 40145f186beSJan Höppner } 40245f186beSJan Höppner 403f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 404f3eb5384SStefan Weinhuber sector = 0; 405f3eb5384SStefan Weinhuber if (rec_on_trk) { 406f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 407f3eb5384SStefan Weinhuber case 0x3390: 408f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 409f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 410f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 411f3eb5384SStefan Weinhuber break; 412f3eb5384SStefan Weinhuber case 0x3380: 413f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 414f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 415f3eb5384SStefan Weinhuber break; 416f3eb5384SStefan Weinhuber } 417f3eb5384SStefan Weinhuber } 418f3eb5384SStefan Weinhuber data->sector = sector; 419f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 420f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 421f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 422f3eb5384SStefan Weinhuber */ 423f3eb5384SStefan Weinhuber data->count = count; 424f3eb5384SStefan Weinhuber switch (cmd) { 425f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 426f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 427f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 428f3eb5384SStefan Weinhuber break; 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 430f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 431f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 432f3eb5384SStefan Weinhuber break; 433f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 434f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 435f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 436f3eb5384SStefan Weinhuber data->count++; 437f3eb5384SStefan Weinhuber break; 438f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 439f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 440f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 441f3eb5384SStefan Weinhuber data->count++; 442f3eb5384SStefan Weinhuber break; 443f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 444f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 445f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 446f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 447f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 448f3eb5384SStefan Weinhuber data->length = reclen; 449f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 450f3eb5384SStefan Weinhuber break; 451f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 452f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 453f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 454f3eb5384SStefan Weinhuber data->length = reclen; 455f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 456f3eb5384SStefan Weinhuber break; 457e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 458e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 459e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 460e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 461e4dbb0f2SStefan Haberland data->length = 0; 462e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 463e4dbb0f2SStefan Haberland if (data->count > 8) { 464e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 465e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 466e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 467e4dbb0f2SStefan Haberland } else { 468e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 469e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 470e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 471e4dbb0f2SStefan Haberland } 472e4dbb0f2SStefan Haberland data->sector = 0xFF; 473e4dbb0f2SStefan Haberland break; 474f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 475f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 476f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 477f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 478f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 479f3eb5384SStefan Weinhuber break; 480f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 481f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 482f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 483f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 484f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 485f3eb5384SStefan Weinhuber data->length = reclen; 486f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 487f3eb5384SStefan Weinhuber break; 488f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 489f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 490f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 491f3eb5384SStefan Weinhuber data->length = reclen; 492f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 493f3eb5384SStefan Weinhuber break; 494f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 495f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 496f3eb5384SStefan Weinhuber break; 497e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 498e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 499e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 500e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 501e4dbb0f2SStefan Haberland data->sector = 0xFF; 502e4dbb0f2SStefan Haberland break; 503f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 504f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 505f3eb5384SStefan Weinhuber data->length = tlf; 506f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 507f3eb5384SStefan Weinhuber break; 508f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 509f3eb5384SStefan Weinhuber data->length = reclen; 510f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 511f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 512f3eb5384SStefan Weinhuber break; 513f3eb5384SStefan Weinhuber default: 514f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 515f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 516f3eb5384SStefan Weinhuber BUG(); 517f3eb5384SStefan Weinhuber } 518f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 519f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 520f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 521f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 522f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 523f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 524f3eb5384SStefan Weinhuber } 525f3eb5384SStefan Weinhuber 526f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 527b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 528f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 52945f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 530f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 5318e09f215SStefan Weinhuber { 5328e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 533f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 53445f186beSJan Höppner struct DE_eckd_data *dedata; 5358e09f215SStefan Weinhuber int rc = 0; 5368e09f215SStefan Weinhuber 537543691a4SSebastian Ott basepriv = basedev->private; 538543691a4SSebastian Ott startpriv = startdev->private; 539f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 540f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 5418e09f215SStefan Weinhuber 5428e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5438e09f215SStefan Weinhuber ccw->flags = 0; 544e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 545e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 546e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 547e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 548e4dbb0f2SStefan Haberland } else { 5498e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5508e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5518e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 552e4dbb0f2SStefan Haberland } 553e4dbb0f2SStefan Haberland 5548e09f215SStefan Weinhuber /* prefix data */ 555f3eb5384SStefan Weinhuber if (format > 1) { 556f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 557f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 558f3eb5384SStefan Weinhuber BUG(); 559f3eb5384SStefan Weinhuber return -EINVAL; 560f3eb5384SStefan Weinhuber } 561f3eb5384SStefan Weinhuber pfxdata->format = format; 5624abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5634abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 564f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5658e09f215SStefan Weinhuber 5668e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 567da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 5688e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 569da340f92SStefan Haberland 570da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 571da340f92SStefan Haberland pfxdata->validity.verify_base = 1; 5728e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5738e09f215SStefan Weinhuber } 5748e09f215SStefan Weinhuber 57545f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5768e09f215SStefan Weinhuber 57745f186beSJan Höppner /* 57845f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 57945f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 58045f186beSJan Höppner * reflected in the prefix data as well. 58145f186beSJan Höppner */ 58245f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 58345f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 584f3eb5384SStefan Weinhuber 585f3eb5384SStefan Weinhuber if (format == 1) { 58645f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 587f3eb5384SStefan Weinhuber basedev, blksize, tlf); 588f3eb5384SStefan Weinhuber } 589f3eb5384SStefan Weinhuber 5908e09f215SStefan Weinhuber return rc; 5918e09f215SStefan Weinhuber } 5928e09f215SStefan Weinhuber 593f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 594f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 595f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 596f3eb5384SStefan Weinhuber { 597f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 598f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 599f3eb5384SStefan Weinhuber } 600f3eb5384SStefan Weinhuber 6014d284cacSHeiko Carstens static void 602b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 603b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6041da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6051da177e4SLinus Torvalds { 606543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 6071da177e4SLinus Torvalds int sector; 6081da177e4SLinus Torvalds int dn, d; 6091da177e4SLinus Torvalds 6101da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6111da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6121da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6151da177e4SLinus Torvalds ccw->flags = 0; 6161da177e4SLinus Torvalds ccw->count = 16; 6171da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6181da177e4SLinus Torvalds 6191da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6201da177e4SLinus Torvalds sector = 0; 6211da177e4SLinus Torvalds if (rec_on_trk) { 6221da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6231da177e4SLinus Torvalds case 0x3390: 6241da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6251da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6261da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6271da177e4SLinus Torvalds break; 6281da177e4SLinus Torvalds case 0x3380: 6291da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6301da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6311da177e4SLinus Torvalds break; 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds data->sector = sector; 6351da177e4SLinus Torvalds data->count = no_rec; 6361da177e4SLinus Torvalds switch (cmd) { 6371da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6381da177e4SLinus Torvalds data->operation.orientation = 0x3; 6391da177e4SLinus Torvalds data->operation.operation = 0x03; 6401da177e4SLinus Torvalds break; 6411da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6421da177e4SLinus Torvalds data->operation.orientation = 0x3; 6431da177e4SLinus Torvalds data->operation.operation = 0x16; 6441da177e4SLinus Torvalds break; 6451da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6461da177e4SLinus Torvalds data->operation.orientation = 0x1; 6471da177e4SLinus Torvalds data->operation.operation = 0x03; 6481da177e4SLinus Torvalds data->count++; 6491da177e4SLinus Torvalds break; 6501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6511da177e4SLinus Torvalds data->operation.orientation = 0x3; 6521da177e4SLinus Torvalds data->operation.operation = 0x16; 6531da177e4SLinus Torvalds data->count++; 6541da177e4SLinus Torvalds break; 6551da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6591da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6601da177e4SLinus Torvalds data->length = reclen; 6611da177e4SLinus Torvalds data->operation.operation = 0x01; 6621da177e4SLinus Torvalds break; 6631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6651da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6661da177e4SLinus Torvalds data->length = reclen; 6671da177e4SLinus Torvalds data->operation.operation = 0x03; 6681da177e4SLinus Torvalds break; 6691da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6701da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6711da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6721da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6731da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6741da177e4SLinus Torvalds data->length = reclen; 6751da177e4SLinus Torvalds data->operation.operation = 0x06; 6761da177e4SLinus Torvalds break; 6771da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6781da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6791da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6801da177e4SLinus Torvalds data->length = reclen; 6811da177e4SLinus Torvalds data->operation.operation = 0x16; 6821da177e4SLinus Torvalds break; 6831da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6841da177e4SLinus Torvalds data->operation.operation = 0x06; 6851da177e4SLinus Torvalds break; 6861da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6871da177e4SLinus Torvalds data->length = reclen; 6881da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6891da177e4SLinus Torvalds data->operation.operation = 0x0b; 6901da177e4SLinus Torvalds break; 6911da177e4SLinus Torvalds default: 692fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 693fc19f381SStefan Haberland "opcode 0x%x", cmd); 6941da177e4SLinus Torvalds } 695b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 696b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 697b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 698b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 699b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7001da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7011da177e4SLinus Torvalds } 7021da177e4SLinus Torvalds 7031da177e4SLinus Torvalds /* 7041da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7051da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7061da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7071da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7081da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7091da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7101da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7111da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7121da177e4SLinus Torvalds */ 7131da177e4SLinus Torvalds static inline int 7141da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7151da177e4SLinus Torvalds { 7161da177e4SLinus Torvalds if (recid < 3) 7171da177e4SLinus Torvalds return 1; 7181da177e4SLinus Torvalds if (recid < blk_per_trk) 7191da177e4SLinus Torvalds return 0; 7201da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7211da177e4SLinus Torvalds return 1; 7221da177e4SLinus Torvalds return 0; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds /* 7261da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7271da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7281da177e4SLinus Torvalds * for the recid. 7291da177e4SLinus Torvalds */ 7301da177e4SLinus Torvalds static inline int 7311da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7321da177e4SLinus Torvalds { 7331da177e4SLinus Torvalds if (recid < 3) 7341da177e4SLinus Torvalds return sizes_trk0[recid]; 7351da177e4SLinus Torvalds return LABEL_SIZE; 7361da177e4SLinus Torvalds } 737b206181dSStefan Haberland /* create unique id from private structure. */ 738b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7393d052595SHorst Hummel { 7404abb08c2SStefan Weinhuber int count; 741b206181dSStefan Haberland struct dasd_uid *uid; 7423d052595SHorst Hummel 7432dedf0d9SStefan Haberland uid = &private->uid; 7443d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7454abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7463d052595SHorst Hummel sizeof(uid->vendor) - 1); 7473d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7484abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7493d052595SHorst Hummel sizeof(uid->serial) - 1); 7503d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7514abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 752a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7534abb08c2SStefan Weinhuber if (private->sneq) { 7544abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7558e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7564abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7578e09f215SStefan Weinhuber } else { 7588e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7598e09f215SStefan Weinhuber } 7604abb08c2SStefan Weinhuber if (private->vdsneq) { 7614abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7624abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7634abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7644abb08c2SStefan Weinhuber } 7654abb08c2SStefan Weinhuber } 766b206181dSStefan Haberland } 767b206181dSStefan Haberland 768b206181dSStefan Haberland /* 769b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 770b206181dSStefan Haberland */ 771b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 772b206181dSStefan Haberland { 773543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 774b206181dSStefan Haberland unsigned long flags; 775b206181dSStefan Haberland 776b206181dSStefan Haberland if (!private) 777b206181dSStefan Haberland return -ENODEV; 778b206181dSStefan Haberland if (!private->ned || !private->gneq) 779b206181dSStefan Haberland return -ENODEV; 780b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 781b206181dSStefan Haberland create_uid(private); 7822dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7833d052595SHorst Hummel return 0; 7843d052595SHorst Hummel } 7853d052595SHorst Hummel 7862dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7872dedf0d9SStefan Haberland { 788543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7892dedf0d9SStefan Haberland unsigned long flags; 7902dedf0d9SStefan Haberland 791543691a4SSebastian Ott if (private) { 7922dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7932dedf0d9SStefan Haberland *uid = private->uid; 7942dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7952dedf0d9SStefan Haberland return 0; 7962dedf0d9SStefan Haberland } 7972dedf0d9SStefan Haberland return -EINVAL; 7982dedf0d9SStefan Haberland } 7992dedf0d9SStefan Haberland 800b206181dSStefan Haberland /* 801b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 802b206181dSStefan Haberland * return 0 for match 803b206181dSStefan Haberland */ 804b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 805b206181dSStefan Haberland struct dasd_eckd_private *private) 806b206181dSStefan Haberland { 807b206181dSStefan Haberland struct dasd_uid device_uid; 808b206181dSStefan Haberland 809b206181dSStefan Haberland create_uid(private); 810b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 811b206181dSStefan Haberland 812b206181dSStefan Haberland return memcmp(&device_uid, &private->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 9484abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9494abb08c2SStefan Weinhuber { 9504abb08c2SStefan Weinhuber 9514abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9524abb08c2SStefan Weinhuber int i, count; 9534abb08c2SStefan Weinhuber 9544abb08c2SStefan Weinhuber private->ned = NULL; 9554abb08c2SStefan Weinhuber private->sneq = NULL; 9564abb08c2SStefan Weinhuber private->vdsneq = NULL; 9574abb08c2SStefan Weinhuber private->gneq = NULL; 9584abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9594abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9604abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9614abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9624abb08c2SStefan Weinhuber private->sneq = sneq; 9634abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9644abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9654abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9664abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9674abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9684abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9694abb08c2SStefan Weinhuber sneq++; 9704abb08c2SStefan Weinhuber } 9714abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9724abb08c2SStefan Weinhuber private->ned = NULL; 9734abb08c2SStefan Weinhuber private->sneq = NULL; 9744abb08c2SStefan Weinhuber private->vdsneq = NULL; 9754abb08c2SStefan Weinhuber private->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 1003c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1004c7c0c9deSStefan Haberland { 1005543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1006c7c0c9deSStefan Haberland int i; 1007c7c0c9deSStefan Haberland 1008c7c0c9deSStefan Haberland private->conf_data = NULL; 1009c7c0c9deSStefan Haberland private->conf_len = 0; 1010c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1011c9346151SStefan Haberland kfree(device->path[i].conf_data); 1012c9346151SStefan Haberland device->path[i].conf_data = NULL; 1013a521b048SStefan Haberland device->path[i].cssid = 0; 1014a521b048SStefan Haberland device->path[i].ssid = 0; 1015a521b048SStefan Haberland device->path[i].chpid = 0; 1016c7c0c9deSStefan Haberland } 1017c7c0c9deSStefan Haberland } 1018c7c0c9deSStefan Haberland 1019c7c0c9deSStefan Haberland 10204abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10211da177e4SLinus Torvalds { 10221da177e4SLinus Torvalds void *conf_data; 10231da177e4SLinus Torvalds int conf_len, conf_data_saved; 1024b179b037SStefan Haberland int rc, path_err, pos; 1025a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1026b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1027b206181dSStefan Haberland struct dasd_uid *uid; 1028b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 1029ded27d8dSSebastian Ott struct channel_path_desc_fmt0 *chp_desc; 1030a521b048SStefan Haberland struct subchannel_id sch_id; 10311da177e4SLinus Torvalds 1032543691a4SSebastian Ott private = device->private; 1033a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 1034a521b048SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 10351da177e4SLinus Torvalds conf_data_saved = 0; 103655d3a85cSStefan Haberland path_err = 0; 10371da177e4SLinus Torvalds /* get configuration data per operational path */ 10381da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1039b206181dSStefan Haberland if (!(lpm & opm)) 1040b206181dSStefan Haberland continue; 104117283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10421da177e4SLinus Torvalds &conf_len, lpm); 10431da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1044b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10451da177e4SLinus Torvalds "Read configuration data returned " 1046b8ed5dd5SStefan Haberland "error %d", rc); 10471da177e4SLinus Torvalds return rc; 10481da177e4SLinus Torvalds } 10491da177e4SLinus Torvalds if (conf_data == NULL) { 1050b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1051b8ed5dd5SStefan Haberland "No configuration data " 1052b8ed5dd5SStefan Haberland "retrieved"); 1053a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1054c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1055d133a960SGabriel Craciunescu continue; /* no error */ 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds /* save first valid configuration data */ 10581da177e4SLinus Torvalds if (!conf_data_saved) { 1059c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1060c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10614abb08c2SStefan Weinhuber private->conf_data = conf_data; 10624abb08c2SStefan Weinhuber private->conf_len = conf_len; 10634abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10644abb08c2SStefan Weinhuber private->conf_data = NULL; 10654abb08c2SStefan Weinhuber private->conf_len = 0; 10664abb08c2SStefan Weinhuber kfree(conf_data); 10674abb08c2SStefan Weinhuber continue; 10684abb08c2SStefan Weinhuber } 1069c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1070c7c0c9deSStefan Haberland /* store per path conf_data */ 1071c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1072a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1073a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1074a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1075a521b048SStefan Haberland if (chp_desc) 1076a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1077a521b048SStefan Haberland kfree(chp_desc); 1078b206181dSStefan Haberland /* 1079b206181dSStefan Haberland * build device UID that other path data 1080b206181dSStefan Haberland * can be compared to it 1081b206181dSStefan Haberland */ 1082b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10831da177e4SLinus Torvalds conf_data_saved++; 1084b206181dSStefan Haberland } else { 1085b206181dSStefan Haberland path_private.conf_data = conf_data; 1086b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1087b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1088b206181dSStefan Haberland &path_private)) { 1089b206181dSStefan Haberland path_private.conf_data = NULL; 1090b206181dSStefan Haberland path_private.conf_len = 0; 1091b206181dSStefan Haberland kfree(conf_data); 1092b206181dSStefan Haberland continue; 1093b206181dSStefan Haberland } 1094b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1095b206181dSStefan Haberland device, &path_private)) { 1096b206181dSStefan Haberland uid = &path_private.uid; 1097b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1098b206181dSStefan Haberland snprintf(print_path_uid, 1099b206181dSStefan Haberland sizeof(print_path_uid), 1100b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1101b206181dSStefan Haberland uid->vendor, uid->serial, 1102b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1103b206181dSStefan Haberland uid->vduit); 1104b206181dSStefan Haberland else 1105b206181dSStefan Haberland snprintf(print_path_uid, 1106b206181dSStefan Haberland sizeof(print_path_uid), 1107b206181dSStefan Haberland "%s.%s.%04x.%02x", 1108b206181dSStefan Haberland uid->vendor, uid->serial, 1109b206181dSStefan Haberland uid->ssid, 1110b206181dSStefan Haberland uid->real_unit_addr); 1111b206181dSStefan Haberland uid = &private->uid; 1112b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1113b206181dSStefan Haberland snprintf(print_device_uid, 1114b206181dSStefan Haberland sizeof(print_device_uid), 1115b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1116b206181dSStefan Haberland uid->vendor, uid->serial, 1117b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1118b206181dSStefan Haberland uid->vduit); 1119b206181dSStefan Haberland else 1120b206181dSStefan Haberland snprintf(print_device_uid, 1121b206181dSStefan Haberland sizeof(print_device_uid), 1122b206181dSStefan Haberland "%s.%s.%04x.%02x", 1123b206181dSStefan Haberland uid->vendor, uid->serial, 1124b206181dSStefan Haberland uid->ssid, 1125b206181dSStefan Haberland uid->real_unit_addr); 1126b206181dSStefan Haberland dev_err(&device->cdev->dev, 1127b206181dSStefan Haberland "Not all channel paths lead to " 1128b206181dSStefan Haberland "the same device, path %02X leads to " 1129b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1130b206181dSStefan Haberland print_path_uid, print_device_uid); 113155d3a85cSStefan Haberland path_err = -EINVAL; 1132c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 113355d3a85cSStefan Haberland continue; 1134b206181dSStefan Haberland } 1135c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1136c7c0c9deSStefan Haberland /* store per path conf_data */ 1137c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1138a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1139a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1140a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1141a521b048SStefan Haberland if (chp_desc) 1142a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1143a521b048SStefan Haberland kfree(chp_desc); 1144b206181dSStefan Haberland path_private.conf_data = NULL; 1145b206181dSStefan Haberland path_private.conf_len = 0; 11461da177e4SLinus Torvalds } 11474abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11481da177e4SLinus Torvalds case 0x02: 1149c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11501da177e4SLinus Torvalds break; 11511da177e4SLinus Torvalds case 0x03: 1152c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11531da177e4SLinus Torvalds break; 11541da177e4SLinus Torvalds } 1155c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1156c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1157ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1158ccc0e7dcSStefan Haberland } else { 1159c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1160ccc0e7dcSStefan Haberland } 11611da177e4SLinus Torvalds } 1162b206181dSStefan Haberland 116355d3a85cSStefan Haberland return path_err; 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 1166a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1167a521b048SStefan Haberland { 1168a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1169a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1170dd4b3c83SJan Höppner unsigned int mdc; 1171dd4b3c83SJan Höppner int tpm; 1172a521b048SStefan Haberland 1173a521b048SStefan Haberland if (dasd_nofcx) 1174a521b048SStefan Haberland return 0; 1175a521b048SStefan Haberland /* is transport mode supported? */ 1176a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1177a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1178a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1179a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1180a521b048SStefan Haberland 1181a521b048SStefan Haberland if (!tpm) 1182a521b048SStefan Haberland return 0; 1183a521b048SStefan Haberland 1184a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1185dd4b3c83SJan Höppner if (mdc == 0) { 1186a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1187a521b048SStefan Haberland return 0; 1188a521b048SStefan Haberland } else { 1189a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1190a521b048SStefan Haberland } 1191a521b048SStefan Haberland } 1192a521b048SStefan Haberland 1193a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1194a4d26c6aSStefan Weinhuber { 1195543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1196dd4b3c83SJan Höppner unsigned int mdc; 1197a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1198a4d26c6aSStefan Weinhuber 1199a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1200a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1201dd4b3c83SJan Höppner if (mdc == 0) { 1202a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1203a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1204a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1205a4d26c6aSStefan Weinhuber mdc, lpm); 1206a4d26c6aSStefan Weinhuber return mdc; 1207a4d26c6aSStefan Weinhuber } 12080f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1209a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1210a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1211a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1212a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1213a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1214a4d26c6aSStefan Weinhuber private->fcx_max_data); 1215a4d26c6aSStefan Weinhuber return -EACCES; 1216a4d26c6aSStefan Weinhuber } 1217a4d26c6aSStefan Weinhuber } 1218a4d26c6aSStefan Weinhuber return 0; 1219a4d26c6aSStefan Weinhuber } 1220a4d26c6aSStefan Weinhuber 1221b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1222b206181dSStefan Haberland struct path_verification_work_data *data) 1223b206181dSStefan Haberland { 1224543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1225c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1226543691a4SSebastian Ott int rc = -ENODEV; 1227b206181dSStefan Haberland 1228b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1229b206181dSStefan Haberland if (!(lpm & opm)) 1230b206181dSStefan Haberland continue; 1231b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1232b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1233b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1234b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1235b206181dSStefan Haberland data->rcd_buffer, 1236b206181dSStefan Haberland lpm); 1237b206181dSStefan Haberland 1238b206181dSStefan Haberland if (rc) { 1239b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1240b206181dSStefan Haberland continue; 1241b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1242b206181dSStefan Haberland "Read configuration data " 1243b206181dSStefan Haberland "returned error %d", rc); 1244b206181dSStefan Haberland break; 1245b206181dSStefan Haberland } 1246b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1247b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1248b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1249b206181dSStefan Haberland rc = -ENODEV; 1250b206181dSStefan Haberland } else /* first valid path is enough */ 1251b206181dSStefan Haberland break; 1252b206181dSStefan Haberland } 1253b206181dSStefan Haberland 1254b206181dSStefan Haberland if (!rc) 1255b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1256b206181dSStefan Haberland 1257b206181dSStefan Haberland return rc; 1258b206181dSStefan Haberland } 1259b206181dSStefan Haberland 1260a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1261a4d26c6aSStefan Weinhuber { 1262a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1263a4d26c6aSStefan Weinhuber struct dasd_device *device; 1264b206181dSStefan Haberland struct dasd_eckd_private path_private; 1265b206181dSStefan Haberland struct dasd_uid *uid; 1266b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12675db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1268a4d26c6aSStefan Weinhuber unsigned long flags; 1269b206181dSStefan Haberland char print_uid[60]; 1270a4d26c6aSStefan Weinhuber int rc; 1271a4d26c6aSStefan Weinhuber 1272a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1273a4d26c6aSStefan Weinhuber device = data->device; 1274a4d26c6aSStefan Weinhuber 1275c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1276c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1277c8d1c0ffSStefan Haberland schedule_work(work); 1278c8d1c0ffSStefan Haberland return; 1279c8d1c0ffSStefan Haberland } 12801eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12811eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12821eb38023SStefan Haberland schedule_work(work); 12831eb38023SStefan Haberland return; 12841eb38023SStefan Haberland } 1285a4d26c6aSStefan Weinhuber opm = 0; 1286a4d26c6aSStefan Weinhuber npm = 0; 1287a4d26c6aSStefan Weinhuber ppm = 0; 1288a4d26c6aSStefan Weinhuber epm = 0; 12895db8440cSStefan Haberland hpfpm = 0; 12905db8440cSStefan Haberland cablepm = 0; 12915db8440cSStefan Haberland 1292a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1293b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1294b206181dSStefan Haberland continue; 1295b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1296a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1297a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1298a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1299a4d26c6aSStefan Weinhuber data->rcd_buffer, 1300a4d26c6aSStefan Weinhuber lpm); 1301a4d26c6aSStefan Weinhuber if (!rc) { 1302a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1303b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1304b206181dSStefan Haberland ) { 1305a4d26c6aSStefan Weinhuber case 0x02: 1306a4d26c6aSStefan Weinhuber npm |= lpm; 1307a4d26c6aSStefan Weinhuber break; 1308a4d26c6aSStefan Weinhuber case 0x03: 1309a4d26c6aSStefan Weinhuber ppm |= lpm; 1310a4d26c6aSStefan Weinhuber break; 1311a4d26c6aSStefan Weinhuber } 1312a4d26c6aSStefan Weinhuber opm |= lpm; 1313a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1314a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1315a4d26c6aSStefan Weinhuber "path verification: No configuration " 1316a4d26c6aSStefan Weinhuber "data retrieved"); 1317a4d26c6aSStefan Weinhuber opm |= lpm; 1318a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1319a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1320a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1321a4d26c6aSStefan Weinhuber " try again later"); 1322a4d26c6aSStefan Weinhuber epm |= lpm; 1323a4d26c6aSStefan Weinhuber } else { 1324a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1325a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1326a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1327a4d26c6aSStefan Weinhuber continue; 1328a4d26c6aSStefan Weinhuber } 1329a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1330a4d26c6aSStefan Weinhuber opm &= ~lpm; 1331a4d26c6aSStefan Weinhuber npm &= ~lpm; 1332a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13335db8440cSStefan Haberland hpfpm |= lpm; 1334b206181dSStefan Haberland continue; 1335b206181dSStefan Haberland } 1336b206181dSStefan Haberland 1337b206181dSStefan Haberland /* 1338b206181dSStefan Haberland * save conf_data for comparison after 1339b206181dSStefan Haberland * rebuild_device_uid may have changed 1340b206181dSStefan Haberland * the original data 1341b206181dSStefan Haberland */ 1342b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1343b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1344b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1345b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1346b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1347b206181dSStefan Haberland path_private.conf_data = NULL; 1348b206181dSStefan Haberland path_private.conf_len = 0; 1349b206181dSStefan Haberland continue; 1350b206181dSStefan Haberland } 1351b206181dSStefan Haberland 1352b206181dSStefan Haberland /* 1353b206181dSStefan Haberland * compare path UID with device UID only if at least 1354b206181dSStefan Haberland * one valid path is left 1355b206181dSStefan Haberland * in other case the device UID may have changed and 1356b206181dSStefan Haberland * the first working path UID will be used as device UID 1357b206181dSStefan Haberland */ 1358c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1359b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1360b206181dSStefan Haberland /* 1361b206181dSStefan Haberland * the comparison was not successful 1362b206181dSStefan Haberland * rebuild the device UID with at least one 1363b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1364b206181dSStefan Haberland * has changed the device 1365b206181dSStefan Haberland * 1366b206181dSStefan Haberland * after this compare again 1367b206181dSStefan Haberland * 1368b206181dSStefan Haberland * if either the rebuild or the recompare fails 1369b206181dSStefan Haberland * the path can not be used 1370b206181dSStefan Haberland */ 1371b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1372b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1373b206181dSStefan Haberland device, &path_private)) { 1374b206181dSStefan Haberland uid = &path_private.uid; 1375b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1376b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1377b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1378b206181dSStefan Haberland uid->vendor, uid->serial, 1379b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1380b206181dSStefan Haberland uid->vduit); 1381b206181dSStefan Haberland else 1382b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1383b206181dSStefan Haberland "%s.%s.%04x.%02x", 1384b206181dSStefan Haberland uid->vendor, uid->serial, 1385b206181dSStefan Haberland uid->ssid, 1386b206181dSStefan Haberland uid->real_unit_addr); 1387b206181dSStefan Haberland dev_err(&device->cdev->dev, 1388b206181dSStefan Haberland "The newly added channel path %02X " 1389b206181dSStefan Haberland "will not be used because it leads " 1390b206181dSStefan Haberland "to a different device %s\n", 1391b206181dSStefan Haberland lpm, print_uid); 1392b206181dSStefan Haberland opm &= ~lpm; 1393b206181dSStefan Haberland npm &= ~lpm; 1394b206181dSStefan Haberland ppm &= ~lpm; 13955db8440cSStefan Haberland cablepm |= lpm; 1396b206181dSStefan Haberland continue; 1397a4d26c6aSStefan Weinhuber } 1398a4d26c6aSStefan Weinhuber } 1399b206181dSStefan Haberland 1400a4d26c6aSStefan Weinhuber /* 1401a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1402a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1403a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1404a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1405a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1406a4d26c6aSStefan Weinhuber */ 1407a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1408c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1409c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1410a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14115db8440cSStefan Haberland } else { 1412c9346151SStefan Haberland dasd_path_add_opm(device, opm); 14135db8440cSStefan Haberland } 1414c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1415c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1416c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1417c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1418c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1419a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1420b206181dSStefan Haberland } 14211eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1422a4d26c6aSStefan Weinhuber dasd_put_device(device); 1423a4d26c6aSStefan Weinhuber if (data->isglobal) 1424a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1425a4d26c6aSStefan Weinhuber else 1426a4d26c6aSStefan Weinhuber kfree(data); 1427a4d26c6aSStefan Weinhuber } 1428a4d26c6aSStefan Weinhuber 1429a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1430a4d26c6aSStefan Weinhuber { 1431a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1432a4d26c6aSStefan Weinhuber 1433a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1434a4d26c6aSStefan Weinhuber if (!data) { 1435a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1436a4d26c6aSStefan Weinhuber data = path_verification_worker; 1437a4d26c6aSStefan Weinhuber data->isglobal = 1; 1438a4d26c6aSStefan Weinhuber } else 1439a4d26c6aSStefan Weinhuber return -ENOMEM; 1440a4d26c6aSStefan Weinhuber } else { 1441a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1442a4d26c6aSStefan Weinhuber data->isglobal = 0; 1443a4d26c6aSStefan Weinhuber } 1444a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1445a4d26c6aSStefan Weinhuber dasd_get_device(device); 1446a4d26c6aSStefan Weinhuber data->device = device; 1447a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1448a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1449a4d26c6aSStefan Weinhuber return 0; 1450a4d26c6aSStefan Weinhuber } 1451a4d26c6aSStefan Weinhuber 1452a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1453a521b048SStefan Haberland { 1454a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1455a521b048SStefan Haberland unsigned long flags; 1456a521b048SStefan Haberland 1457a521b048SStefan Haberland if (!private->fcx_max_data) 1458a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1459a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1460a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1461a521b048SStefan Haberland dasd_schedule_device_bh(device); 1462a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1463a521b048SStefan Haberland } 1464a521b048SStefan Haberland 14658e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14668e09f215SStefan Weinhuber { 1467543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14688e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14698e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14708e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14718e09f215SStefan Weinhuber struct ccw1 *ccw; 14728e09f215SStefan Weinhuber int rc; 14738e09f215SStefan Weinhuber 147468d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 147568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14768e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14778e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1478c5205f2fSSebastian Ott device, NULL); 14798e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1480b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1481b8ed5dd5SStefan Haberland "allocate initialization request"); 14828e09f215SStefan Weinhuber return PTR_ERR(cqr); 14838e09f215SStefan Weinhuber } 14848e09f215SStefan Weinhuber cqr->startdev = device; 14858e09f215SStefan Weinhuber cqr->memdev = device; 14868e09f215SStefan Weinhuber cqr->block = NULL; 1487eb6e199bSStefan Weinhuber cqr->retries = 256; 14888e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14898e09f215SStefan Weinhuber 14908e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14918e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14928e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14938e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14948e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14958e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14968e09f215SStefan Weinhuber 14978e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14988e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14998e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 15008e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 15018e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 15028e09f215SStefan Weinhuber 15038e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 15048e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15058e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15068e09f215SStefan Weinhuber 15078e09f215SStefan Weinhuber ccw++; 15088e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15098e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 15108e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 15118e09f215SStefan Weinhuber 15121aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15138e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15148e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15158e09f215SStefan Weinhuber if (rc == 0) { 15168e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15178e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15188e09f215SStefan Weinhuber memcpy(&private->features, features, 15198e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 152068d1e5f0SStefan Weinhuber } else 152168d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 152268d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15238e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15248e09f215SStefan Weinhuber return rc; 15258e09f215SStefan Weinhuber } 15268e09f215SStefan Weinhuber 1527c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1528c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1529c729696bSJan Höppner { 1530c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1531c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1532c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1533c729696bSJan Höppner struct dasd_ccw_req *cqr; 1534c729696bSJan Höppner struct ccw1 *ccw; 15359e12e54cSJan Höppner int useglobal; 1536c729696bSJan Höppner int rc; 1537c729696bSJan Höppner 1538c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1539c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1540c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1541c729696bSJan Höppner return 0; 1542c729696bSJan Höppner 15439e12e54cSJan Höppner useglobal = 0; 1544c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1545c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1546c729696bSJan Höppner if (IS_ERR(cqr)) { 1547c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1548c729696bSJan Höppner "Could not allocate initialization request"); 15499e12e54cSJan Höppner mutex_lock(&dasd_vol_info_mutex); 15509e12e54cSJan Höppner useglobal = 1; 15519e12e54cSJan Höppner cqr = &dasd_vol_info_req->cqr; 15529e12e54cSJan Höppner memset(cqr, 0, sizeof(*cqr)); 15539e12e54cSJan Höppner memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 15549e12e54cSJan Höppner cqr->cpaddr = &dasd_vol_info_req->ccw; 15559e12e54cSJan Höppner cqr->data = &dasd_vol_info_req->data; 15569e12e54cSJan Höppner cqr->magic = DASD_ECKD_MAGIC; 1557c729696bSJan Höppner } 1558c729696bSJan Höppner 1559c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1560c729696bSJan Höppner prssdp = cqr->data; 1561c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1562c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1563c729696bSJan Höppner prssdp->lss = private->ned->ID; 1564c729696bSJan Höppner prssdp->volume = private->ned->unit_addr; 1565c729696bSJan Höppner 1566c729696bSJan Höppner ccw = cqr->cpaddr; 1567c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1568c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1569c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1570c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1571c729696bSJan Höppner 1572c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1573c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1574c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1575c729696bSJan Höppner 1576c729696bSJan Höppner ccw++; 1577c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1578c729696bSJan Höppner ccw->count = sizeof(*vsq); 1579c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1580c729696bSJan Höppner ccw->cda = (__u32)(addr_t)vsq; 1581c729696bSJan Höppner 1582c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1583c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1584c729696bSJan Höppner cqr->startdev = device; 1585c729696bSJan Höppner cqr->memdev = device; 1586c729696bSJan Höppner cqr->block = NULL; 1587c729696bSJan Höppner cqr->retries = 256; 1588c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1589c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1590c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1591c729696bSJan Höppner 1592c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1593c729696bSJan Höppner if (rc == 0) { 1594c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1595c729696bSJan Höppner } else { 1596dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1597dd454839SJan Höppner "Reading the volume storage information failed with rc=%d", rc); 1598c729696bSJan Höppner } 1599c729696bSJan Höppner 16009e12e54cSJan Höppner if (useglobal) 16019e12e54cSJan Höppner mutex_unlock(&dasd_vol_info_mutex); 16029e12e54cSJan Höppner else 1603c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1604c729696bSJan Höppner 1605c729696bSJan Höppner return rc; 1606c729696bSJan Höppner } 1607c729696bSJan Höppner 1608c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1609c729696bSJan Höppner { 1610c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1611c729696bSJan Höppner 1612c729696bSJan Höppner return private->vsq.vol_info.ese; 1613c729696bSJan Höppner } 1614c729696bSJan Höppner 1615c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1616c729696bSJan Höppner { 1617c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1618c729696bSJan Höppner 1619c729696bSJan Höppner return private->vsq.extent_pool_id; 1620c729696bSJan Höppner } 1621c729696bSJan Höppner 1622c729696bSJan Höppner /* 1623c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1624c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1625c729696bSJan Höppner * The data for this value is therefore updated on any call. 1626c729696bSJan Höppner */ 1627c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1628c729696bSJan Höppner { 1629c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1630c729696bSJan Höppner int rc; 1631c729696bSJan Höppner 1632c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1633c729696bSJan Höppner 1634c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1635c729696bSJan Höppner } 1636c729696bSJan Höppner 1637c729696bSJan Höppner /* 1638c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1639c729696bSJan Höppner * therefore updated on any call. 1640c729696bSJan Höppner */ 1641c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1642c729696bSJan Höppner { 1643c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1644c729696bSJan Höppner int rc; 1645c729696bSJan Höppner 1646c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1647c729696bSJan Höppner 1648c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1649c729696bSJan Höppner } 1650c729696bSJan Höppner 1651c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1652c729696bSJan Höppner { 1653c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1654c729696bSJan Höppner 1655c729696bSJan Höppner return private->vsq.logical_capacity; 1656c729696bSJan Höppner } 1657c729696bSJan Höppner 16589e12e54cSJan Höppner static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 16599e12e54cSJan Höppner { 16609e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 16619e12e54cSJan Höppner struct dasd_device *device; 16629e12e54cSJan Höppner struct dasd_device *base; 16639e12e54cSJan Höppner 16649e12e54cSJan Höppner data = container_of(work, struct ext_pool_exhaust_work_data, worker); 16659e12e54cSJan Höppner device = data->device; 16669e12e54cSJan Höppner base = data->base; 16679e12e54cSJan Höppner 16689e12e54cSJan Höppner if (!base) 16699e12e54cSJan Höppner base = device; 16709e12e54cSJan Höppner if (dasd_eckd_space_configured(base) != 0) { 16719e12e54cSJan Höppner dasd_generic_space_avail(device); 16729e12e54cSJan Höppner } else { 16739e12e54cSJan Höppner dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 16749e12e54cSJan Höppner DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 16759e12e54cSJan Höppner } 16769e12e54cSJan Höppner 16779e12e54cSJan Höppner dasd_put_device(device); 16789e12e54cSJan Höppner kfree(data); 16799e12e54cSJan Höppner } 16809e12e54cSJan Höppner 16819e12e54cSJan Höppner static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 16829e12e54cSJan Höppner struct dasd_ccw_req *cqr) 16839e12e54cSJan Höppner { 16849e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 16859e12e54cSJan Höppner 16869e12e54cSJan Höppner data = kzalloc(sizeof(*data), GFP_ATOMIC); 16879e12e54cSJan Höppner if (!data) 16889e12e54cSJan Höppner return -ENOMEM; 16899e12e54cSJan Höppner INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 16909e12e54cSJan Höppner dasd_get_device(device); 16919e12e54cSJan Höppner data->device = device; 16929e12e54cSJan Höppner 16939e12e54cSJan Höppner if (cqr->block) 16949e12e54cSJan Höppner data->base = cqr->block->base; 16959e12e54cSJan Höppner else if (cqr->basedev) 16969e12e54cSJan Höppner data->base = cqr->basedev; 16979e12e54cSJan Höppner else 16989e12e54cSJan Höppner data->base = NULL; 16999e12e54cSJan Höppner 17009e12e54cSJan Höppner schedule_work(&data->worker); 17019e12e54cSJan Höppner 17029e12e54cSJan Höppner return 0; 17039e12e54cSJan Höppner } 17049e12e54cSJan Höppner 1705c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1706c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1707c729696bSJan Höppner { 1708c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1709c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1710c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1711c729696bSJan Höppner int i; 1712c729696bSJan Höppner 1713c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1714c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1715c729696bSJan Höppner if (eps.pool_id == pool_id) { 1716c729696bSJan Höppner memcpy(&private->eps, &eps, 1717c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1718c729696bSJan Höppner } 1719c729696bSJan Höppner } 1720c729696bSJan Höppner } 1721c729696bSJan Höppner 1722c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1723c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1724c729696bSJan Höppner { 1725c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1726c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1727c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1728c729696bSJan Höppner struct dasd_ccw_req *cqr; 1729c729696bSJan Höppner struct ccw1 *ccw; 1730c729696bSJan Höppner int rc; 1731c729696bSJan Höppner 1732c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1733c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1734c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1735c729696bSJan Höppner return 0; 1736c729696bSJan Höppner 1737c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1738c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1739c729696bSJan Höppner if (IS_ERR(cqr)) { 1740c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1741c729696bSJan Höppner "Could not allocate initialization request"); 1742c729696bSJan Höppner return PTR_ERR(cqr); 1743c729696bSJan Höppner } 1744c729696bSJan Höppner 1745c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1746c729696bSJan Höppner prssdp = cqr->data; 1747c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1748c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1749c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1750c729696bSJan Höppner 1751c729696bSJan Höppner ccw = cqr->cpaddr; 1752c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1753c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1754c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1755c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1756c729696bSJan Höppner 1757c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1758c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1759c729696bSJan Höppner 1760c729696bSJan Höppner ccw++; 1761c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1762c729696bSJan Höppner ccw->count = sizeof(*lcq); 1763c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1764c729696bSJan Höppner ccw->cda = (__u32)(addr_t)lcq; 1765c729696bSJan Höppner 1766c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1767c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1768c729696bSJan Höppner cqr->startdev = device; 1769c729696bSJan Höppner cqr->memdev = device; 1770c729696bSJan Höppner cqr->block = NULL; 1771c729696bSJan Höppner cqr->retries = 256; 1772c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1773c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1774c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1775c729696bSJan Höppner 1776c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1777c729696bSJan Höppner if (rc == 0) { 1778c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1779c729696bSJan Höppner } else { 1780dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1781dd454839SJan Höppner "Reading the logical configuration failed with rc=%d", rc); 1782c729696bSJan Höppner } 1783c729696bSJan Höppner 1784c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1785c729696bSJan Höppner 1786c729696bSJan Höppner return rc; 1787c729696bSJan Höppner } 1788c729696bSJan Höppner 1789c729696bSJan Höppner /* 1790c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1791c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1792c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1793c729696bSJan Höppner */ 1794c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1795c729696bSJan Höppner { 1796c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1797c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1798c729696bSJan Höppner 1799c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1800c729696bSJan Höppner return 0; 1801c729696bSJan Höppner if (eps.extent_size.size_1G) 1802c729696bSJan Höppner return 1113; 1803c729696bSJan Höppner if (eps.extent_size.size_16M) 1804c729696bSJan Höppner return 21; 1805c729696bSJan Höppner 1806c729696bSJan Höppner return 0; 1807c729696bSJan Höppner } 1808c729696bSJan Höppner 1809c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1810c729696bSJan Höppner { 1811c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1812c729696bSJan Höppner 1813c729696bSJan Höppner return private->eps.warn_thrshld; 1814c729696bSJan Höppner } 1815c729696bSJan Höppner 1816c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1817c729696bSJan Höppner { 1818c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1819c729696bSJan Höppner 1820c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1821c729696bSJan Höppner } 1822c729696bSJan Höppner 1823c729696bSJan Höppner /* 1824c729696bSJan Höppner * Extent Pool out of space 1825c729696bSJan Höppner */ 1826c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1827c729696bSJan Höppner { 1828c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1829c729696bSJan Höppner 1830c729696bSJan Höppner return private->eps.flags.pool_oos; 1831c729696bSJan Höppner } 18328e09f215SStefan Weinhuber 18333d052595SHorst Hummel /* 183440545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 183540545573SHorst Hummel */ 1836f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1837f3eb5384SStefan Weinhuber int enable_pav) 183840545573SHorst Hummel { 183940545573SHorst Hummel struct dasd_ccw_req *cqr; 184040545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 184140545573SHorst Hummel struct ccw1 *ccw; 184240545573SHorst Hummel 184368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 184440545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1845c5205f2fSSebastian Ott device, NULL); 184640545573SHorst Hummel 184740545573SHorst Hummel if (IS_ERR(cqr)) { 1848fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 184940545573SHorst Hummel "Could not allocate PSF-SSC request"); 185040545573SHorst Hummel return cqr; 185140545573SHorst Hummel } 185240545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 185340545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1854626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1855f3eb5384SStefan Weinhuber if (enable_pav) { 1856626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 18578e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1858f3eb5384SStefan Weinhuber } 185940545573SHorst Hummel ccw = cqr->cpaddr; 186040545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 186140545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 186240545573SHorst Hummel ccw->count = 66; 186340545573SHorst Hummel 18648e09f215SStefan Weinhuber cqr->startdev = device; 18658e09f215SStefan Weinhuber cqr->memdev = device; 18668e09f215SStefan Weinhuber cqr->block = NULL; 1867eb6e199bSStefan Weinhuber cqr->retries = 256; 186840545573SHorst Hummel cqr->expires = 10*HZ; 18691aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 187040545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 187140545573SHorst Hummel return cqr; 187240545573SHorst Hummel } 187340545573SHorst Hummel 187440545573SHorst Hummel /* 187540545573SHorst Hummel * Perform Subsystem Function. 187640545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 187740545573SHorst Hummel * call might change behaviour of DASD devices. 187840545573SHorst Hummel */ 187940545573SHorst Hummel static int 188012d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 188112d7b107SStefan Haberland unsigned long flags) 188240545573SHorst Hummel { 188340545573SHorst Hummel struct dasd_ccw_req *cqr; 188440545573SHorst Hummel int rc; 188540545573SHorst Hummel 1886f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 188740545573SHorst Hummel if (IS_ERR(cqr)) 188840545573SHorst Hummel return PTR_ERR(cqr); 188940545573SHorst Hummel 189012d7b107SStefan Haberland /* 189112d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 189212d7b107SStefan Haberland * the calling function should handle failed requests 189312d7b107SStefan Haberland */ 189412d7b107SStefan Haberland cqr->flags |= flags; 189512d7b107SStefan Haberland 189640545573SHorst Hummel rc = dasd_sleep_on(cqr); 189740545573SHorst Hummel if (!rc) 189840545573SHorst Hummel /* trigger CIO to reprobe devices */ 189940545573SHorst Hummel css_schedule_reprobe(); 190012d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 190112d7b107SStefan Haberland rc = -EAGAIN; 190212d7b107SStefan Haberland 19038e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 190440545573SHorst Hummel return rc; 190540545573SHorst Hummel } 190640545573SHorst Hummel 190740545573SHorst Hummel /* 190840545573SHorst Hummel * Valide storage server of current device. 190940545573SHorst Hummel */ 191012d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 191112d7b107SStefan Haberland unsigned long flags) 191240545573SHorst Hummel { 1913543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1914543691a4SSebastian Ott int enable_pav, rc; 191540545573SHorst Hummel 1916f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1917f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 191812d7b107SStefan Haberland return 0; 191940545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1920f3eb5384SStefan Weinhuber enable_pav = 0; 1921f3eb5384SStefan Weinhuber else 1922f3eb5384SStefan Weinhuber enable_pav = 1; 192312d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1924eb6e199bSStefan Weinhuber 192540545573SHorst Hummel /* may be requested feature is not available on server, 192640545573SHorst Hummel * therefore just report error and go ahead */ 1927b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1928b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 192912d7b107SStefan Haberland return rc; 193040545573SHorst Hummel } 193140545573SHorst Hummel 1932f1633031SStefan Haberland /* 1933f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1934f1633031SStefan Haberland */ 1935f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1936f1633031SStefan Haberland { 1937f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1938f1633031SStefan Haberland kick_validate); 1939ea4da6eaSStefan Haberland unsigned long flags = 0; 1940ea4da6eaSStefan Haberland 1941ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1942ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 194312d7b107SStefan Haberland == -EAGAIN) { 194412d7b107SStefan Haberland /* schedule worker again if failed */ 194512d7b107SStefan Haberland schedule_work(&device->kick_validate); 194612d7b107SStefan Haberland return; 194712d7b107SStefan Haberland } 194812d7b107SStefan Haberland 1949f1633031SStefan Haberland dasd_put_device(device); 1950f1633031SStefan Haberland } 1951f1633031SStefan Haberland 1952f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1953f1633031SStefan Haberland { 1954f1633031SStefan Haberland dasd_get_device(device); 195525e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 195625e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 195725e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 195825e2cf1cSStefan Haberland dasd_put_device(device); 195925e2cf1cSStefan Haberland return; 196025e2cf1cSStefan Haberland } 1961f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1962f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1963f2608cd4SStefan Haberland dasd_put_device(device); 1964f1633031SStefan Haberland } 1965f1633031SStefan Haberland 196640545573SHorst Hummel /* 19673d052595SHorst Hummel * Check device characteristics. 19683d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 19693d052595SHorst Hummel */ 19701da177e4SLinus Torvalds static int 19711da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 19721da177e4SLinus Torvalds { 1973543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19748e09f215SStefan Weinhuber struct dasd_block *block; 19752dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1976f9f8d02fSStefan Haberland int rc, i; 197733b62a30SStefan Weinhuber int readonly; 19787c8faa86SStefan Haberland unsigned long value; 19791da177e4SLinus Torvalds 1980f1633031SStefan Haberland /* setup work queue for validate server*/ 1981f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 198259a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 198359a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1984f1633031SStefan Haberland 1985454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1986454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1987454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1988454e1fa1SPeter Oberparleiter return -EIO; 1989454e1fa1SPeter Oberparleiter } 1990454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1991454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1992454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1993454e1fa1SPeter Oberparleiter } 199492636b15SSebastian Ott if (!private) { 199592636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 199692636b15SSebastian Ott if (!private) { 1997fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1998fc19f381SStefan Haberland "Allocating memory for private DASD data " 1999fc19f381SStefan Haberland "failed\n"); 20001da177e4SLinus Torvalds return -ENOMEM; 20011da177e4SLinus Torvalds } 2002543691a4SSebastian Ott device->private = private; 200392636b15SSebastian Ott } else { 200492636b15SSebastian Ott memset(private, 0, sizeof(*private)); 20051da177e4SLinus Torvalds } 20061da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 20071da177e4SLinus Torvalds private->init_cqr_status = -1; 20081da177e4SLinus Torvalds /* Set default cache operations. */ 20091da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 20101da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 20111da177e4SLinus Torvalds 201240545573SHorst Hummel /* Read Configuration Data */ 201340545573SHorst Hummel rc = dasd_eckd_read_conf(device); 201440545573SHorst Hummel if (rc) 20158e09f215SStefan Weinhuber goto out_err1; 201640545573SHorst Hummel 2017a521b048SStefan Haberland /* set some default values */ 20187c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 20191f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 2020a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2021a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 20221f1ee9adSHannes Reinecke 20237c8faa86SStefan Haberland if (private->gneq) { 20247c8faa86SStefan Haberland value = 1; 20257c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 20267c8faa86SStefan Haberland value = 10 * value; 20277c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 20287c8faa86SStefan Haberland /* do not accept useless values */ 20297c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 20307c8faa86SStefan Haberland device->default_expires = value; 20317c8faa86SStefan Haberland } 20327c8faa86SStefan Haberland 20332dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 20342dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 20358e09f215SStefan Weinhuber block = dasd_alloc_block(); 20368e09f215SStefan Weinhuber if (IS_ERR(block)) { 2037b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 2038b8ed5dd5SStefan Haberland "could not allocate dasd " 2039b8ed5dd5SStefan Haberland "block structure"); 20408e09f215SStefan Weinhuber rc = PTR_ERR(block); 20418e09f215SStefan Weinhuber goto out_err1; 20428e09f215SStefan Weinhuber } 20438e09f215SStefan Weinhuber device->block = block; 20448e09f215SStefan Weinhuber block->base = device; 20458e09f215SStefan Weinhuber } 20468e09f215SStefan Weinhuber 2047f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 2048f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 2049f9f8d02fSStefan Haberland if (rc) 20508e09f215SStefan Weinhuber goto out_err2; 2051f9f8d02fSStefan Haberland 205212d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 2053f4ac1d02SStefan Weinhuber 2054f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 2055f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 205640545573SHorst Hummel if (rc) 20578e09f215SStefan Weinhuber goto out_err3; 20588e09f215SStefan Weinhuber 20598e09f215SStefan Weinhuber /* Read Feature Codes */ 206068d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 206140545573SHorst Hummel 2062c729696bSJan Höppner /* Read Volume Information */ 2063dd454839SJan Höppner dasd_eckd_read_vol_info(device); 2064c729696bSJan Höppner 2065c729696bSJan Höppner /* Read Extent Pool Information */ 2066dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 2067c729696bSJan Höppner 20681da177e4SLinus Torvalds /* Read Device Characteristics */ 206968b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 207068b781feSStefan Haberland &private->rdc_data, 64); 20718e09f215SStefan Weinhuber if (rc) { 2072b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2073b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 20748e09f215SStefan Weinhuber goto out_err3; 20758e09f215SStefan Weinhuber } 207634cd551aSStefan Haberland 207734cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 207834cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 207934cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 208034cd551aSStefan Haberland "support raw-track access\n"); 208134cd551aSStefan Haberland rc = -EINVAL; 208234cd551aSStefan Haberland goto out_err3; 208334cd551aSStefan Haberland } 208434cd551aSStefan Haberland 2085817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 2086b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2087b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 2088b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 2089b44b0ab3SStefan Weinhuber else 2090b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 2091b44b0ab3SStefan Weinhuber 2092ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 2093ef19298bSStefan Weinhuber 209433b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 209533b62a30SStefan Weinhuber if (readonly) 209633b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 209733b62a30SStefan Weinhuber 2098fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 209933b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 21001da177e4SLinus Torvalds private->rdc_data.dev_type, 21011da177e4SLinus Torvalds private->rdc_data.dev_model, 21021da177e4SLinus Torvalds private->rdc_data.cu_type, 21031da177e4SLinus Torvalds private->rdc_data.cu_model.model, 2104b44b0ab3SStefan Weinhuber private->real_cyl, 21051da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 210633b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 210733b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 21088e09f215SStefan Weinhuber return 0; 21098e09f215SStefan Weinhuber 21108e09f215SStefan Weinhuber out_err3: 21118e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 21128e09f215SStefan Weinhuber out_err2: 21138e09f215SStefan Weinhuber dasd_free_block(device->block); 21148e09f215SStefan Weinhuber device->block = NULL; 21158e09f215SStefan Weinhuber out_err1: 211600b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 21178e09f215SStefan Weinhuber kfree(device->private); 21188e09f215SStefan Weinhuber device->private = NULL; 21193d052595SHorst Hummel return rc; 21201da177e4SLinus Torvalds } 21211da177e4SLinus Torvalds 21228e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 21238e09f215SStefan Weinhuber { 2124543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21254abb08c2SStefan Weinhuber 21267c6553d4SStefan Haberland if (!private) 21277c6553d4SStefan Haberland return; 21287c6553d4SStefan Haberland 21298e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 21304abb08c2SStefan Weinhuber private->ned = NULL; 21314abb08c2SStefan Weinhuber private->sneq = NULL; 21324abb08c2SStefan Weinhuber private->vdsneq = NULL; 21334abb08c2SStefan Weinhuber private->gneq = NULL; 213400b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 21358e09f215SStefan Weinhuber } 21368e09f215SStefan Weinhuber 21371da177e4SLinus Torvalds static struct dasd_ccw_req * 21381da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 21391da177e4SLinus Torvalds { 2140543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21411da177e4SLinus Torvalds struct eckd_count *count_data; 21421da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 21431da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 21441da177e4SLinus Torvalds struct ccw1 *ccw; 21451da177e4SLinus Torvalds int cplength, datasize; 21461da177e4SLinus Torvalds int i; 21471da177e4SLinus Torvalds 21481da177e4SLinus Torvalds cplength = 8; 21491da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2150c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2151c5205f2fSSebastian Ott NULL); 21521da177e4SLinus Torvalds if (IS_ERR(cqr)) 21531da177e4SLinus Torvalds return cqr; 21541da177e4SLinus Torvalds ccw = cqr->cpaddr; 2155ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2156ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 215745f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 21581da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 21591da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 21601da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21611da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 21621da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 21631da177e4SLinus Torvalds 21641da177e4SLinus Torvalds count_data = private->count_area; 21651da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 21661da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21671da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 21681da177e4SLinus Torvalds ccw->flags = 0; 21691da177e4SLinus Torvalds ccw->count = 8; 21701da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 21711da177e4SLinus Torvalds ccw++; 21721da177e4SLinus Torvalds count_data++; 21731da177e4SLinus Torvalds } 21741da177e4SLinus Torvalds 2175ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 21761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2177ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 21781da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 21791da177e4SLinus Torvalds /* Read count ccw. */ 21801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21811da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 21821da177e4SLinus Torvalds ccw->flags = 0; 21831da177e4SLinus Torvalds ccw->count = 8; 21841da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 21851da177e4SLinus Torvalds 21868e09f215SStefan Weinhuber cqr->block = NULL; 21878e09f215SStefan Weinhuber cqr->startdev = device; 21888e09f215SStefan Weinhuber cqr->memdev = device; 2189eb6e199bSStefan Weinhuber cqr->retries = 255; 21901aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 21911da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 21929e12e54cSJan Höppner /* Set flags to suppress output for expected errors */ 21939e12e54cSJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 21949e12e54cSJan Höppner 21951da177e4SLinus Torvalds return cqr; 21961da177e4SLinus Torvalds } 21971da177e4SLinus Torvalds 2198eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2199eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2200eb6e199bSStefan Weinhuber { 2201eb6e199bSStefan Weinhuber char *sense; 2202eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2203eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2204eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2205eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2206eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2207eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2208eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2209eb6e199bSStefan Weinhuber else 2210eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2211eb6e199bSStefan Weinhuber } else 2212eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2213eb6e199bSStefan Weinhuber } 2214eb6e199bSStefan Weinhuber 22151da177e4SLinus Torvalds /* 22161da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 22171da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 22181da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 22191da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 22201da177e4SLinus Torvalds * for deletion in the meantime). 22211da177e4SLinus Torvalds */ 2222eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2223eb6e199bSStefan Weinhuber void *data) 22241da177e4SLinus Torvalds { 2225543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2226543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22271da177e4SLinus Torvalds 2228eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 22291da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 22301da177e4SLinus Torvalds dasd_kick_device(device); 22311da177e4SLinus Torvalds } 22321da177e4SLinus Torvalds 2233eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 22341da177e4SLinus Torvalds { 22351da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 22361da177e4SLinus Torvalds 22378e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 22381da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 22391da177e4SLinus Torvalds return PTR_ERR(init_cqr); 22401da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 22411da177e4SLinus Torvalds init_cqr->callback_data = NULL; 22421da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2243eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2244eb6e199bSStefan Weinhuber * devices as special case 2245eb6e199bSStefan Weinhuber */ 2246eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2247eb6e199bSStefan Weinhuber init_cqr->retries = 0; 22481da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 22491da177e4SLinus Torvalds return -EAGAIN; 22501da177e4SLinus Torvalds } 22511da177e4SLinus Torvalds 2252eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 22531da177e4SLinus Torvalds { 2254543691a4SSebastian Ott struct dasd_device *device = block->base; 2255543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22561da177e4SLinus Torvalds struct eckd_count *count_area; 22571da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 22581da177e4SLinus Torvalds int status, i; 2259eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 22601da177e4SLinus Torvalds 22611da177e4SLinus Torvalds status = private->init_cqr_status; 22621da177e4SLinus Torvalds private->init_cqr_status = -1; 2263eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2264eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2265eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2266eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2267eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2268eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2269eb6e199bSStefan Weinhuber } 2270eb6e199bSStefan Weinhuber 2271e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2272e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2273e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2274e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2275e4dbb0f2SStefan Haberland goto raw; 2276e4dbb0f2SStefan Haberland } 2277e4dbb0f2SStefan Haberland 2278eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2279eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 22801da177e4SLinus Torvalds return -EMEDIUMTYPE; 2281eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2282eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2283eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2284eb6e199bSStefan Weinhuber "of an I/O error\n"); 2285eb6e199bSStefan Weinhuber return -EIO; 22861da177e4SLinus Torvalds } 22871da177e4SLinus Torvalds 22881da177e4SLinus Torvalds private->uses_cdl = 1; 22891da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 22901da177e4SLinus Torvalds count_area = NULL; 22911da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 22921da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 22933bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 22943bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 22953bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22963bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 22971da177e4SLinus Torvalds private->uses_cdl = 0; 22981da177e4SLinus Torvalds break; 22991da177e4SLinus Torvalds } 23001da177e4SLinus Torvalds } 23011da177e4SLinus Torvalds if (i == 3) 2302ce6915f5SJan Höppner count_area = &private->count_area[3]; 23031da177e4SLinus Torvalds 23041da177e4SLinus Torvalds if (private->uses_cdl == 0) { 23051da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 23061da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 23071da177e4SLinus Torvalds (private->count_area[i].dl != 23083bc9fef9SStefan Haberland private->count_area[0].dl) || 23093bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23103bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23113bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 23121da177e4SLinus Torvalds break; 23131da177e4SLinus Torvalds } 23141da177e4SLinus Torvalds if (i == 5) 23151da177e4SLinus Torvalds count_area = &private->count_area[0]; 23161da177e4SLinus Torvalds } else { 23171da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2318fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2319fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 23201da177e4SLinus Torvalds } 2321e4dbb0f2SStefan Haberland 23221da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 23231da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 23241da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 23258e09f215SStefan Weinhuber block->bp_block = count_area->dl; 23261da177e4SLinus Torvalds } 23278e09f215SStefan Weinhuber if (block->bp_block == 0) { 2328fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2329fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 23301da177e4SLinus Torvalds return -EMEDIUMTYPE; 23311da177e4SLinus Torvalds } 23328e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 23338e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 23348e09f215SStefan Weinhuber block->s2b_shift++; 23351da177e4SLinus Torvalds 23368e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2337e4dbb0f2SStefan Haberland 2338e4dbb0f2SStefan Haberland raw: 23392cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 23401da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23411da177e4SLinus Torvalds blk_per_trk); 23421da177e4SLinus Torvalds 2343fc19f381SStefan Haberland dev_info(&device->cdev->dev, 23442cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2345fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 23462cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 23471da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23488e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 23498e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 23501da177e4SLinus Torvalds private->uses_cdl ? 23511da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 23521da177e4SLinus Torvalds 23531da177e4SLinus Torvalds return 0; 23541da177e4SLinus Torvalds } 23551da177e4SLinus Torvalds 23568e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 23571da177e4SLinus Torvalds { 2358543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 23591da177e4SLinus Torvalds 23601da177e4SLinus Torvalds if (private->init_cqr_status < 0) 23618e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 23621da177e4SLinus Torvalds else 23638e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 23641da177e4SLinus Torvalds } 23651da177e4SLinus Torvalds 2366d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 23678e09f215SStefan Weinhuber { 23688e09f215SStefan Weinhuber return dasd_alias_add_device(device); 23698e09f215SStefan Weinhuber }; 23708e09f215SStefan Weinhuber 23718e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 23728e09f215SStefan Weinhuber { 2373669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2374669f3765SStefan Haberland dasd_put_device(device); 2375669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2376669f3765SStefan Haberland dasd_put_device(device); 2377669f3765SStefan Haberland 2378d42e1712SStefan Haberland return 0; 2379d42e1712SStefan Haberland }; 2380d42e1712SStefan Haberland 2381daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2382d42e1712SStefan Haberland { 23838e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 23848e09f215SStefan Weinhuber }; 23858e09f215SStefan Weinhuber 23861da177e4SLinus Torvalds static int 23878e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 23881da177e4SLinus Torvalds { 2389543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 23901da177e4SLinus Torvalds 23918e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 23921da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 23938e09f215SStefan Weinhuber 0, block->bp_block); 23941da177e4SLinus Torvalds } 23951da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 23961da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 23971da177e4SLinus Torvalds return 0; 23981da177e4SLinus Torvalds } 23991da177e4SLinus Torvalds 24008fd57520SJan Höppner /* 24018fd57520SJan Höppner * Build the TCW request for the format check 24028fd57520SJan Höppner */ 24038fd57520SJan Höppner static struct dasd_ccw_req * 24048fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 24058fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 24068fd57520SJan Höppner int rpt) 24078fd57520SJan Höppner { 24088fd57520SJan Höppner struct dasd_eckd_private *start_priv; 24098fd57520SJan Höppner struct dasd_device *startdev = NULL; 24108fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 24118fd57520SJan Höppner struct dasd_ccw_req *cqr; 24128fd57520SJan Höppner struct itcw *itcw; 24138fd57520SJan Höppner int itcw_size; 24148fd57520SJan Höppner int count; 24158fd57520SJan Höppner int rc; 24168fd57520SJan Höppner int i; 24178fd57520SJan Höppner 24188fd57520SJan Höppner if (enable_pav) 24198fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 24208fd57520SJan Höppner 24218fd57520SJan Höppner if (!startdev) 24228fd57520SJan Höppner startdev = base; 24238fd57520SJan Höppner 24248fd57520SJan Höppner start_priv = startdev->private; 24258fd57520SJan Höppner 24268fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24278fd57520SJan Höppner 24288fd57520SJan Höppner /* 24298fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 24308fd57520SJan Höppner * calculate the corresponding itcw_size 24318fd57520SJan Höppner */ 24328fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 24338fd57520SJan Höppner 24345e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 24358fd57520SJan Höppner if (IS_ERR(cqr)) 24368fd57520SJan Höppner return cqr; 24378fd57520SJan Höppner 24388fd57520SJan Höppner start_priv->count++; 24398fd57520SJan Höppner 24408fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 24418fd57520SJan Höppner if (IS_ERR(itcw)) { 24428fd57520SJan Höppner rc = -EINVAL; 24438fd57520SJan Höppner goto out_err; 24448fd57520SJan Höppner } 24458fd57520SJan Höppner 24468fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 24478fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 24488fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 24498fd57520SJan Höppner sizeof(struct eckd_count), 24508fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 24518fd57520SJan Höppner if (rc) 24528fd57520SJan Höppner goto out_err; 24538fd57520SJan Höppner 24548fd57520SJan Höppner for (i = 0; i < count; i++) { 24558fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 24568fd57520SJan Höppner sizeof(struct eckd_count)); 24578fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 24588fd57520SJan Höppner rc = -EINVAL; 24598fd57520SJan Höppner goto out_err; 24608fd57520SJan Höppner } 24618fd57520SJan Höppner } 24628fd57520SJan Höppner 24638fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 24648fd57520SJan Höppner itcw_finalize(itcw); 24658fd57520SJan Höppner 24668fd57520SJan Höppner cqr->cpmode = 1; 24678fd57520SJan Höppner cqr->startdev = startdev; 24688fd57520SJan Höppner cqr->memdev = startdev; 24698fd57520SJan Höppner cqr->basedev = base; 24708fd57520SJan Höppner cqr->retries = startdev->default_retries; 24718fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 24728fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 24738fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 24748fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 24758fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 24768fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 24778fd57520SJan Höppner 24788fd57520SJan Höppner return cqr; 24798fd57520SJan Höppner 24808fd57520SJan Höppner out_err: 24818fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 24828fd57520SJan Höppner 24838fd57520SJan Höppner return ERR_PTR(rc); 24848fd57520SJan Höppner } 24858fd57520SJan Höppner 24868fd57520SJan Höppner /* 24878fd57520SJan Höppner * Build the CCW request for the format check 24888fd57520SJan Höppner */ 24898fd57520SJan Höppner static struct dasd_ccw_req * 24908fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 24918fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 24928fd57520SJan Höppner { 24938fd57520SJan Höppner struct dasd_eckd_private *start_priv; 24948fd57520SJan Höppner struct dasd_eckd_private *base_priv; 24958fd57520SJan Höppner struct dasd_device *startdev = NULL; 24968fd57520SJan Höppner struct dasd_ccw_req *cqr; 24978fd57520SJan Höppner struct ccw1 *ccw; 24988fd57520SJan Höppner void *data; 24998fd57520SJan Höppner int cplength, datasize; 25008fd57520SJan Höppner int use_prefix; 25018fd57520SJan Höppner int count; 25028fd57520SJan Höppner int i; 25038fd57520SJan Höppner 25048fd57520SJan Höppner if (enable_pav) 25058fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 25068fd57520SJan Höppner 25078fd57520SJan Höppner if (!startdev) 25088fd57520SJan Höppner startdev = base; 25098fd57520SJan Höppner 25108fd57520SJan Höppner start_priv = startdev->private; 25118fd57520SJan Höppner base_priv = base->private; 25128fd57520SJan Höppner 25138fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 25148fd57520SJan Höppner 25158fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 25168fd57520SJan Höppner 25178fd57520SJan Höppner if (use_prefix) { 25188fd57520SJan Höppner cplength = 1; 25198fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 25208fd57520SJan Höppner } else { 25218fd57520SJan Höppner cplength = 2; 25228fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 25238fd57520SJan Höppner sizeof(struct LO_eckd_data); 25248fd57520SJan Höppner } 25258fd57520SJan Höppner cplength += count; 25268fd57520SJan Höppner 25275e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 25288fd57520SJan Höppner if (IS_ERR(cqr)) 25298fd57520SJan Höppner return cqr; 25308fd57520SJan Höppner 25318fd57520SJan Höppner start_priv->count++; 25328fd57520SJan Höppner data = cqr->data; 25338fd57520SJan Höppner ccw = cqr->cpaddr; 25348fd57520SJan Höppner 25358fd57520SJan Höppner if (use_prefix) { 25368fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 25378fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 25388fd57520SJan Höppner count, 0, 0); 25398fd57520SJan Höppner } else { 25408fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 254145f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 25428fd57520SJan Höppner 25438fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 25448fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25458fd57520SJan Höppner 25468fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 25478fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 25488fd57520SJan Höppner } 25498fd57520SJan Höppner 25508fd57520SJan Höppner for (i = 0; i < count; i++) { 25518fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25528fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 25538fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 25548fd57520SJan Höppner ccw->count = 8; 25558fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 25568fd57520SJan Höppner ccw++; 25578fd57520SJan Höppner fmt_buffer++; 25588fd57520SJan Höppner } 25598fd57520SJan Höppner 25608fd57520SJan Höppner cqr->startdev = startdev; 25618fd57520SJan Höppner cqr->memdev = startdev; 25628fd57520SJan Höppner cqr->basedev = base; 25638fd57520SJan Höppner cqr->retries = DASD_RETRIES; 25648fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 25658fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 25668fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 25678fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 25688fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 25698fd57520SJan Höppner 25708fd57520SJan Höppner return cqr; 25718fd57520SJan Höppner } 25728fd57520SJan Höppner 25731da177e4SLinus Torvalds static struct dasd_ccw_req * 25745e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 25755e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 25761da177e4SLinus Torvalds { 2577d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2578d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 25791da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 25801da177e4SLinus Torvalds struct eckd_count *ect; 2581d42e1712SStefan Haberland struct ch_t address; 25821da177e4SLinus Torvalds struct ccw1 *ccw; 25831da177e4SLinus Torvalds void *data; 2584b44b0ab3SStefan Weinhuber int rpt; 25851da177e4SLinus Torvalds int cplength, datasize; 2586d42e1712SStefan Haberland int i, j; 2587f9a28f7bSJean-Baptiste Joret int intensity = 0; 2588f9a28f7bSJean-Baptiste Joret int r0_perm; 2589d42e1712SStefan Haberland int nr_tracks; 259018d6624eSStefan Haberland int use_prefix; 25911da177e4SLinus Torvalds 2592a94fa154SStefan Haberland if (enable_pav) 2593d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 259429b8dd9dSStefan Haberland 2595d42e1712SStefan Haberland if (!startdev) 2596d42e1712SStefan Haberland startdev = base; 25971da177e4SLinus Torvalds 2598543691a4SSebastian Ott start_priv = startdev->private; 2599543691a4SSebastian Ott base_priv = base->private; 2600d42e1712SStefan Haberland 2601d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2602d42e1712SStefan Haberland 2603d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 26041da177e4SLinus Torvalds 26051da177e4SLinus Torvalds /* 26061da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 26071da177e4SLinus Torvalds * Bit 0: write record zero 26081da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 26091da177e4SLinus Torvalds * Bit 2: invalidate tracks 26101da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2611f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 26121da177e4SLinus Torvalds * Only some bit combinations do make sense. 26131da177e4SLinus Torvalds */ 2614f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2615f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2616f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2617f9a28f7bSJean-Baptiste Joret } else { 2618f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2619f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2620f9a28f7bSJean-Baptiste Joret } 2621d42e1712SStefan Haberland 262218d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 262318d6624eSStefan Haberland 2624f9a28f7bSJean-Baptiste Joret switch (intensity) { 26251da177e4SLinus Torvalds case 0x00: /* Normal format */ 26261da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2627d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 262818d6624eSStefan Haberland if (use_prefix) 2629d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26301da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2631d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 263218d6624eSStefan Haberland else 263318d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 263418d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 263518d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26361da177e4SLinus Torvalds break; 26371da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 26381da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2639d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 264018d6624eSStefan Haberland if (use_prefix) 2641d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26421da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26431da177e4SLinus Torvalds sizeof(struct eckd_count) + 2644d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 264518d6624eSStefan Haberland else 264618d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 264718d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 264818d6624eSStefan Haberland sizeof(struct eckd_count) + 264918d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26501da177e4SLinus Torvalds break; 26511da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 26521da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 26531da177e4SLinus Torvalds cplength = 3; 265418d6624eSStefan Haberland if (use_prefix) 2655d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26561da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26571da177e4SLinus Torvalds sizeof(struct eckd_count); 265818d6624eSStefan Haberland else 265918d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 266018d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 266118d6624eSStefan Haberland sizeof(struct eckd_count); 26621da177e4SLinus Torvalds break; 26631da177e4SLinus Torvalds default: 2664d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2665d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2666d42e1712SStefan Haberland fdata->intensity); 26671da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26681da177e4SLinus Torvalds } 26695e2b17e7SJan Höppner 26705e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 26711da177e4SLinus Torvalds if (IS_ERR(fcp)) 26721da177e4SLinus Torvalds return fcp; 26731da177e4SLinus Torvalds 2674d42e1712SStefan Haberland start_priv->count++; 26751da177e4SLinus Torvalds data = fcp->data; 26761da177e4SLinus Torvalds ccw = fcp->cpaddr; 26771da177e4SLinus Torvalds 2678f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 26791da177e4SLinus Torvalds case 0x00: /* Normal format. */ 268018d6624eSStefan Haberland if (use_prefix) { 2681d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2682d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2683d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2684f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2685f9a28f7bSJean-Baptiste Joret if (r0_perm) 2686d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2687d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2688d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 268918d6624eSStefan Haberland } else { 269018d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 269118d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 269245f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 269318d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 269418d6624eSStefan Haberland if (r0_perm) 269518d6624eSStefan Haberland ((struct DE_eckd_data *) data) 269618d6624eSStefan Haberland ->ga_extended |= 0x04; 269718d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 269818d6624eSStefan Haberland } 26991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27001da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2701d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2702d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 27031da177e4SLinus Torvalds fdata->blksize); 27041da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27051da177e4SLinus Torvalds break; 27061da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 270718d6624eSStefan Haberland if (use_prefix) { 2708d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2709d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 27101da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2711d42e1712SStefan Haberland base, startdev); 2712d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 271318d6624eSStefan Haberland } else { 271418d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 271518d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 271645f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 271718d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 271818d6624eSStefan Haberland } 27191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27201da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2721d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2722d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2723d42e1712SStefan Haberland base->block->bp_block); 27241da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27251da177e4SLinus Torvalds break; 27261da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 272718d6624eSStefan Haberland if (use_prefix) { 2728d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2729d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2730d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2731d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 273218d6624eSStefan Haberland } else { 273318d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 273418d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 273545f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 273618d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 273718d6624eSStefan Haberland } 27381da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27391da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 27401da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2741d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 27421da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27431da177e4SLinus Torvalds break; 27441da177e4SLinus Torvalds } 2745d42e1712SStefan Haberland 2746d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2747d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2748d42e1712SStefan Haberland set_ch_t(&address, 2749d42e1712SStefan Haberland (fdata->start_unit + j) / 2750d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2751d42e1712SStefan Haberland (fdata->start_unit + j) % 2752d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2753f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 27541da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27551da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2756b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2757b44b0ab3SStefan Weinhuber ect->head = address.head; 27581da177e4SLinus Torvalds ect->record = 0; 27591da177e4SLinus Torvalds ect->kl = 0; 27601da177e4SLinus Torvalds ect->dl = 8; 27611da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27621da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 27631da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27641da177e4SLinus Torvalds ccw->count = 8; 27651da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27661da177e4SLinus Torvalds ccw++; 27671da177e4SLinus Torvalds } 2768f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 27691da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27701da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2771b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2772b44b0ab3SStefan Weinhuber ect->head = address.head; 27731da177e4SLinus Torvalds ect->record = 1; 27741da177e4SLinus Torvalds ect->kl = 0; 27751da177e4SLinus Torvalds ect->dl = 0; 27761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27771da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 27781da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27791da177e4SLinus Torvalds ccw->count = 8; 27801da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27811da177e4SLinus Torvalds } else { /* write remaining records */ 27821da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 27831da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27841da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2785b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2786b44b0ab3SStefan Weinhuber ect->head = address.head; 27871da177e4SLinus Torvalds ect->record = i + 1; 27881da177e4SLinus Torvalds ect->kl = 0; 27891da177e4SLinus Torvalds ect->dl = fdata->blksize; 2790d42e1712SStefan Haberland /* 2791d42e1712SStefan Haberland * Check for special tracks 0-1 2792d42e1712SStefan Haberland * when formatting CDL 2793d42e1712SStefan Haberland */ 2794f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 279546d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 27961da177e4SLinus Torvalds if (i < 3) { 27971da177e4SLinus Torvalds ect->kl = 4; 27981da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 27991da177e4SLinus Torvalds } 28001da177e4SLinus Torvalds } 2801f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 280246d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 28031da177e4SLinus Torvalds ect->kl = 44; 28041da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 28051da177e4SLinus Torvalds } 28061da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2807d42e1712SStefan Haberland if (i != 0 || j == 0) 2808d42e1712SStefan Haberland ccw->cmd_code = 2809d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2810d42e1712SStefan Haberland else 2811d42e1712SStefan Haberland ccw->cmd_code = 2812d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 28131da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28141da177e4SLinus Torvalds ccw->count = 8; 28151da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28161da177e4SLinus Torvalds ccw++; 28171da177e4SLinus Torvalds } 28181da177e4SLinus Torvalds } 2819d42e1712SStefan Haberland } 2820d42e1712SStefan Haberland 2821d42e1712SStefan Haberland fcp->startdev = startdev; 2822d42e1712SStefan Haberland fcp->memdev = startdev; 282329b8dd9dSStefan Haberland fcp->basedev = base; 2824eb6e199bSStefan Weinhuber fcp->retries = 256; 2825d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 28261aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 28271da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2828d42e1712SStefan Haberland 28291da177e4SLinus Torvalds return fcp; 28301da177e4SLinus Torvalds } 28311da177e4SLinus Torvalds 2832570d237cSJan Höppner /* 2833570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2834570d237cSJan Höppner */ 2835570d237cSJan Höppner static struct dasd_ccw_req * 2836570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 28378fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 28388fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2839d42e1712SStefan Haberland { 28408fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 28418fd57520SJan Höppner 28428fd57520SJan Höppner if (!fmt_buffer) { 28435e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 28448fd57520SJan Höppner } else { 28458fd57520SJan Höppner if (tpm) 28468fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 28478fd57520SJan Höppner enable_pav, 28488fd57520SJan Höppner fmt_buffer, rpt); 28498fd57520SJan Höppner else 28508fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 28518fd57520SJan Höppner fmt_buffer, rpt); 28528fd57520SJan Höppner } 28538fd57520SJan Höppner 28548fd57520SJan Höppner return ccw_req; 2855570d237cSJan Höppner } 2856570d237cSJan Höppner 2857570d237cSJan Höppner /* 2858570d237cSJan Höppner * Sanity checks on format_data 2859570d237cSJan Höppner */ 2860570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2861570d237cSJan Höppner struct format_data_t *fdata) 2862570d237cSJan Höppner { 2863543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2864d42e1712SStefan Haberland 2865d42e1712SStefan Haberland if (fdata->start_unit >= 2866d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2867d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2868d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2869d42e1712SStefan Haberland fdata->start_unit); 2870d42e1712SStefan Haberland return -EINVAL; 2871d42e1712SStefan Haberland } 2872d42e1712SStefan Haberland if (fdata->stop_unit >= 2873d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2874d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2875d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2876d42e1712SStefan Haberland fdata->stop_unit); 2877d42e1712SStefan Haberland return -EINVAL; 2878d42e1712SStefan Haberland } 2879d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2880d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2881d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2882d42e1712SStefan Haberland fdata->start_unit); 2883d42e1712SStefan Haberland return -EINVAL; 2884d42e1712SStefan Haberland } 2885d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2886d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2887d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2888d42e1712SStefan Haberland fdata->blksize); 2889d42e1712SStefan Haberland return -EINVAL; 2890d42e1712SStefan Haberland } 2891570d237cSJan Höppner return 0; 2892570d237cSJan Höppner } 2893570d237cSJan Höppner 2894570d237cSJan Höppner /* 2895570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2896570d237cSJan Höppner */ 2897570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2898570d237cSJan Höppner struct format_data_t *fdata, 28998fd57520SJan Höppner int enable_pav, int tpm, 29008fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 29018fd57520SJan Höppner struct irb *irb) 2902570d237cSJan Höppner { 2903543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2904570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2905570d237cSJan Höppner struct list_head format_queue; 2906570d237cSJan Höppner struct dasd_device *device; 29078fd57520SJan Höppner char *sense = NULL; 2908570d237cSJan Höppner int old_start, old_stop, format_step; 2909570d237cSJan Höppner int step, retry; 2910570d237cSJan Höppner int rc; 2911570d237cSJan Höppner 2912570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2913570d237cSJan Höppner if (rc) 2914570d237cSJan Höppner return rc; 2915d42e1712SStefan Haberland 2916d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2917d42e1712SStefan Haberland 291846d1c03cSJan Höppner old_start = fdata->start_unit; 291929b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2920d42e1712SStefan Haberland 29218fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 29228fd57520SJan Höppner /* Command Mode / Format Check */ 29238fd57520SJan Höppner format_step = 1; 29248fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 29258fd57520SJan Höppner /* Transport Mode / Format Check */ 29268fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 29278fd57520SJan Höppner } else { 29288fd57520SJan Höppner /* Normal Formatting */ 29298fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 29308fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 29318fd57520SJan Höppner } 29328fd57520SJan Höppner 293346d1c03cSJan Höppner do { 293446d1c03cSJan Höppner retry = 0; 2935d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2936d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 293746d1c03cSJan Höppner if (step > format_step) { 293846d1c03cSJan Höppner fdata->stop_unit = 293946d1c03cSJan Höppner fdata->start_unit + format_step - 1; 294046d1c03cSJan Höppner } 2941d42e1712SStefan Haberland 2942570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 29438fd57520SJan Höppner enable_pav, tpm, 29448fd57520SJan Höppner fmt_buffer, rpt); 2945d42e1712SStefan Haberland if (IS_ERR(cqr)) { 294646d1c03cSJan Höppner rc = PTR_ERR(cqr); 294746d1c03cSJan Höppner if (rc == -ENOMEM) { 294846d1c03cSJan Höppner if (list_empty(&format_queue)) 294946d1c03cSJan Höppner goto out; 2950d42e1712SStefan Haberland /* 295146d1c03cSJan Höppner * not enough memory available, start 295246d1c03cSJan Höppner * requests retry after first requests 295346d1c03cSJan Höppner * were finished 2954d42e1712SStefan Haberland */ 295546d1c03cSJan Höppner retry = 1; 295646d1c03cSJan Höppner break; 2957d42e1712SStefan Haberland } 295846d1c03cSJan Höppner goto out_err; 295946d1c03cSJan Höppner } 296046d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2961d42e1712SStefan Haberland 29628fd57520SJan Höppner if (fmt_buffer) { 29638fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 29648fd57520SJan Höppner fmt_buffer += rpt * step; 29658fd57520SJan Höppner } 2966d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2967d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2968d42e1712SStefan Haberland } 2969d42e1712SStefan Haberland 297046d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2971d42e1712SStefan Haberland 297246d1c03cSJan Höppner out_err: 2973d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2974d42e1712SStefan Haberland device = cqr->startdev; 2975543691a4SSebastian Ott private = device->private; 29768fd57520SJan Höppner 29778fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 29788fd57520SJan Höppner /* 29798fd57520SJan Höppner * Only get sense data if called by format 29808fd57520SJan Höppner * check 29818fd57520SJan Höppner */ 29828fd57520SJan Höppner if (fmt_buffer && irb) { 29838fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 29848fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 29858fd57520SJan Höppner } 2986d42e1712SStefan Haberland rc = -EIO; 29878fd57520SJan Höppner } 2988d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 29895e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 2990d42e1712SStefan Haberland private->count--; 2991d42e1712SStefan Haberland } 2992d42e1712SStefan Haberland 29938fd57520SJan Höppner if (rc && rc != -EIO) 299446d1c03cSJan Höppner goto out; 29958fd57520SJan Höppner if (rc == -EIO) { 29968fd57520SJan Höppner /* 29978fd57520SJan Höppner * In case fewer than the expected records are on the 29988fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 29998fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 30008fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 30018fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 30028fd57520SJan Höppner * and continue. 30038fd57520SJan Höppner */ 30048fd57520SJan Höppner if (sense && 30058fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 30068fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 30078fd57520SJan Höppner retry = 1; 30088fd57520SJan Höppner else 30098fd57520SJan Höppner goto out; 30108fd57520SJan Höppner } 301129b8dd9dSStefan Haberland 301246d1c03cSJan Höppner } while (retry); 301346d1c03cSJan Höppner 301446d1c03cSJan Höppner out: 301546d1c03cSJan Höppner fdata->start_unit = old_start; 301646d1c03cSJan Höppner fdata->stop_unit = old_stop; 3017d42e1712SStefan Haberland 3018d42e1712SStefan Haberland return rc; 3019d42e1712SStefan Haberland } 3020d42e1712SStefan Haberland 3021570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 3022570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 3023570d237cSJan Höppner { 30248fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 30258fd57520SJan Höppner 0, NULL); 30268fd57520SJan Höppner } 30278fd57520SJan Höppner 30285e6bdd37SStefan Haberland static bool test_and_set_format_track(struct dasd_format_entry *to_format, 30295e6bdd37SStefan Haberland struct dasd_block *block) 30305e6bdd37SStefan Haberland { 30315e6bdd37SStefan Haberland struct dasd_format_entry *format; 30325e6bdd37SStefan Haberland unsigned long flags; 30335e6bdd37SStefan Haberland bool rc = false; 30345e6bdd37SStefan Haberland 30355e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 30365e6bdd37SStefan Haberland list_for_each_entry(format, &block->format_list, list) { 30375e6bdd37SStefan Haberland if (format->track == to_format->track) { 30385e6bdd37SStefan Haberland rc = true; 30395e6bdd37SStefan Haberland goto out; 30405e6bdd37SStefan Haberland } 30415e6bdd37SStefan Haberland } 30425e6bdd37SStefan Haberland list_add_tail(&to_format->list, &block->format_list); 30435e6bdd37SStefan Haberland 30445e6bdd37SStefan Haberland out: 30455e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 30465e6bdd37SStefan Haberland return rc; 30475e6bdd37SStefan Haberland } 30485e6bdd37SStefan Haberland 30495e6bdd37SStefan Haberland static void clear_format_track(struct dasd_format_entry *format, 30505e6bdd37SStefan Haberland struct dasd_block *block) 30515e6bdd37SStefan Haberland { 30525e6bdd37SStefan Haberland unsigned long flags; 30535e6bdd37SStefan Haberland 30545e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 30555e6bdd37SStefan Haberland list_del_init(&format->list); 30565e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 30575e6bdd37SStefan Haberland } 30585e6bdd37SStefan Haberland 30598fd57520SJan Höppner /* 30605e2b17e7SJan Höppner * Callback function to free ESE format requests. 30615e2b17e7SJan Höppner */ 30625e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 30635e2b17e7SJan Höppner { 30645e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 30655e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 30665e6bdd37SStefan Haberland struct dasd_format_entry *format = data; 30675e2b17e7SJan Höppner 30685e6bdd37SStefan Haberland clear_format_track(format, cqr->basedev->block); 30695e2b17e7SJan Höppner private->count--; 30705e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 30715e2b17e7SJan Höppner } 30725e2b17e7SJan Höppner 30735e2b17e7SJan Höppner static struct dasd_ccw_req * 30745e6bdd37SStefan Haberland dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 30755e6bdd37SStefan Haberland struct irb *irb) 30765e2b17e7SJan Höppner { 30775e2b17e7SJan Höppner struct dasd_eckd_private *private; 30785e6bdd37SStefan Haberland struct dasd_format_entry *format; 30795e2b17e7SJan Höppner struct format_data_t fdata; 30805e2b17e7SJan Höppner unsigned int recs_per_trk; 30815e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 30825e2b17e7SJan Höppner struct dasd_device *base; 30835e2b17e7SJan Höppner struct dasd_block *block; 30845e2b17e7SJan Höppner unsigned int blksize; 30855e2b17e7SJan Höppner struct request *req; 30865e2b17e7SJan Höppner sector_t first_trk; 30875e2b17e7SJan Höppner sector_t last_trk; 30885e6bdd37SStefan Haberland sector_t curr_trk; 30895e2b17e7SJan Höppner int rc; 30905e2b17e7SJan Höppner 30915e2b17e7SJan Höppner req = cqr->callback_data; 30925e6bdd37SStefan Haberland block = cqr->block; 30935e6bdd37SStefan Haberland base = block->base; 30945e2b17e7SJan Höppner private = base->private; 30955e2b17e7SJan Höppner blksize = block->bp_block; 30965e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 30975e6bdd37SStefan Haberland format = &startdev->format_entry; 30985e2b17e7SJan Höppner 30995e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 31005e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 31015e2b17e7SJan Höppner last_trk = 31025e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 31035e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 31045e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 31055e6bdd37SStefan Haberland if (rc) 31065e6bdd37SStefan Haberland return ERR_PTR(rc); 31075e2b17e7SJan Höppner 31085e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 31095e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, startdev, 31105e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 31115e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 31125e6bdd37SStefan Haberland return ERR_PTR(-EINVAL); 31135e6bdd37SStefan Haberland } 31145e6bdd37SStefan Haberland format->track = curr_trk; 31155e6bdd37SStefan Haberland /* test if track is already in formatting by another thread */ 31165e6bdd37SStefan Haberland if (test_and_set_format_track(format, block)) 31175e6bdd37SStefan Haberland return ERR_PTR(-EEXIST); 31185e6bdd37SStefan Haberland 31195e6bdd37SStefan Haberland fdata.start_unit = curr_trk; 31205e6bdd37SStefan Haberland fdata.stop_unit = curr_trk; 31215e2b17e7SJan Höppner fdata.blksize = blksize; 31225e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 31235e2b17e7SJan Höppner 31245e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 31255e2b17e7SJan Höppner if (rc) 31265e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 31275e2b17e7SJan Höppner 31285e2b17e7SJan Höppner /* 31295e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 31305e2b17e7SJan Höppner * the former startdev. 31315e2b17e7SJan Höppner */ 31325e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 31335e2b17e7SJan Höppner if (IS_ERR(fcqr)) 31345e2b17e7SJan Höppner return fcqr; 31355e2b17e7SJan Höppner 31365e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 31375e6bdd37SStefan Haberland fcqr->callback_data = (void *) format; 31385e2b17e7SJan Höppner 31395e2b17e7SJan Höppner return fcqr; 31405e2b17e7SJan Höppner } 31415e2b17e7SJan Höppner 31425e2b17e7SJan Höppner /* 31435e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 31445e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 31455e6bdd37SStefan Haberland * 31465e6bdd37SStefan Haberland * The first unformatted track is the one that got the NRF error, the address is 31475e6bdd37SStefan Haberland * encoded in the sense data. 31485e6bdd37SStefan Haberland * 31495e6bdd37SStefan Haberland * All tracks before have returned valid data and should not be touched. 31505e6bdd37SStefan Haberland * All tracks after the unformatted track might be formatted or not. This is 31515e6bdd37SStefan Haberland * currently not known, remember the processed data and return the remainder of 31525e6bdd37SStefan Haberland * the request to the blocklayer in __dasd_cleanup_cqr(). 31535e2b17e7SJan Höppner */ 31545e6bdd37SStefan Haberland static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 31555e2b17e7SJan Höppner { 31565e6bdd37SStefan Haberland struct dasd_eckd_private *private; 31575e6bdd37SStefan Haberland sector_t first_trk, last_trk; 31585e6bdd37SStefan Haberland sector_t first_blk, last_blk; 31595e2b17e7SJan Höppner unsigned int blksize, off; 31605e6bdd37SStefan Haberland unsigned int recs_per_trk; 31615e2b17e7SJan Höppner struct dasd_device *base; 31625e2b17e7SJan Höppner struct req_iterator iter; 31635e6bdd37SStefan Haberland struct dasd_block *block; 31645e6bdd37SStefan Haberland unsigned int skip_block; 31655e6bdd37SStefan Haberland unsigned int blk_count; 31665e2b17e7SJan Höppner struct request *req; 31675e2b17e7SJan Höppner struct bio_vec bv; 31685e6bdd37SStefan Haberland sector_t curr_trk; 31695e6bdd37SStefan Haberland sector_t end_blk; 31705e2b17e7SJan Höppner char *dst; 31715e6bdd37SStefan Haberland int rc; 31725e2b17e7SJan Höppner 31735e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 31745e2b17e7SJan Höppner base = cqr->block->base; 31755e2b17e7SJan Höppner blksize = base->block->bp_block; 31765e6bdd37SStefan Haberland block = cqr->block; 31775e6bdd37SStefan Haberland private = base->private; 31785e6bdd37SStefan Haberland skip_block = 0; 31795e6bdd37SStefan Haberland blk_count = 0; 31805e6bdd37SStefan Haberland 31815e6bdd37SStefan Haberland recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 31825e6bdd37SStefan Haberland first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 31835e6bdd37SStefan Haberland sector_div(first_trk, recs_per_trk); 31845e6bdd37SStefan Haberland last_trk = last_blk = 31855e6bdd37SStefan Haberland (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 31865e6bdd37SStefan Haberland sector_div(last_trk, recs_per_trk); 31875e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 31885e6bdd37SStefan Haberland if (rc) 31895e6bdd37SStefan Haberland return rc; 31905e6bdd37SStefan Haberland 31915e6bdd37SStefan Haberland /* sanity check if the current track from sense data is valid */ 31925e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 31935e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, base, 31945e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 31955e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 31965e6bdd37SStefan Haberland return -EINVAL; 31975e6bdd37SStefan Haberland } 31985e6bdd37SStefan Haberland 31995e6bdd37SStefan Haberland /* 32005e6bdd37SStefan Haberland * if not the first track got the NRF error we have to skip over valid 32015e6bdd37SStefan Haberland * blocks 32025e6bdd37SStefan Haberland */ 32035e6bdd37SStefan Haberland if (curr_trk != first_trk) 32045e6bdd37SStefan Haberland skip_block = curr_trk * recs_per_trk - first_blk; 32055e6bdd37SStefan Haberland 32065e6bdd37SStefan Haberland /* we have no information beyond the current track */ 32075e6bdd37SStefan Haberland end_blk = (curr_trk + 1) * recs_per_trk; 32085e2b17e7SJan Höppner 32095e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 32105e2b17e7SJan Höppner dst = page_address(bv.bv_page) + bv.bv_offset; 32115e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 32125e6bdd37SStefan Haberland if (first_blk + blk_count >= end_blk) { 32135e6bdd37SStefan Haberland cqr->proc_bytes = blk_count * blksize; 32145e6bdd37SStefan Haberland return 0; 32155e6bdd37SStefan Haberland } 32165e6bdd37SStefan Haberland if (dst && !skip_block) { 32175e2b17e7SJan Höppner dst += off; 32185e2b17e7SJan Höppner memset(dst, 0, blksize); 32195e6bdd37SStefan Haberland } else { 32205e6bdd37SStefan Haberland skip_block--; 32215e6bdd37SStefan Haberland } 32225e6bdd37SStefan Haberland blk_count++; 32235e2b17e7SJan Höppner } 32245e2b17e7SJan Höppner } 32255e6bdd37SStefan Haberland return 0; 32265e2b17e7SJan Höppner } 32275e2b17e7SJan Höppner 32285e2b17e7SJan Höppner /* 32298fd57520SJan Höppner * Helper function to count consecutive records of a single track. 32308fd57520SJan Höppner */ 32318fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 32328fd57520SJan Höppner int max) 32338fd57520SJan Höppner { 32348fd57520SJan Höppner int head; 32358fd57520SJan Höppner int i; 32368fd57520SJan Höppner 32378fd57520SJan Höppner head = fmt_buffer[start].head; 32388fd57520SJan Höppner 32398fd57520SJan Höppner /* 32408fd57520SJan Höppner * There are 3 conditions where we stop counting: 32418fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 32428fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 32438fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 32448fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 32458fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 32468fd57520SJan Höppner * record will be 0 then) 32478fd57520SJan Höppner */ 32488fd57520SJan Höppner for (i = start; i < max; i++) { 32498fd57520SJan Höppner if (i > start) { 32508fd57520SJan Höppner if ((fmt_buffer[i].head == head && 32518fd57520SJan Höppner fmt_buffer[i].record == 1) || 32528fd57520SJan Höppner fmt_buffer[i].head != head || 32538fd57520SJan Höppner fmt_buffer[i].record == 0) 32548fd57520SJan Höppner break; 32558fd57520SJan Höppner } 32568fd57520SJan Höppner } 32578fd57520SJan Höppner 32588fd57520SJan Höppner return i - start; 32598fd57520SJan Höppner } 32608fd57520SJan Höppner 32618fd57520SJan Höppner /* 32628fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 32638fd57520SJan Höppner * record ids, and key length are compared with expected data. 32648fd57520SJan Höppner * 32658fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 32668fd57520SJan Höppner * additional information, depending on the error. 32678fd57520SJan Höppner */ 32688fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 32698fd57520SJan Höppner struct format_check_t *cdata, 32708fd57520SJan Höppner int rpt_max, int rpt_exp, 32718fd57520SJan Höppner int trk_per_cyl, int tpm) 32728fd57520SJan Höppner { 32738fd57520SJan Höppner struct ch_t geo; 32748fd57520SJan Höppner int max_entries; 32758fd57520SJan Höppner int count = 0; 32768fd57520SJan Höppner int trkcount; 32778fd57520SJan Höppner int blksize; 32788fd57520SJan Höppner int pos = 0; 32798fd57520SJan Höppner int i, j; 32808fd57520SJan Höppner int kl; 32818fd57520SJan Höppner 32828fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 32838fd57520SJan Höppner max_entries = trkcount * rpt_max; 32848fd57520SJan Höppner 32858fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 32868fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 32878fd57520SJan Höppner if (tpm) { 32888fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 32898fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 32908fd57520SJan Höppner if (pos++ > max_entries) 32918fd57520SJan Höppner break; 32928fd57520SJan Höppner } 32938fd57520SJan Höppner } else { 32948fd57520SJan Höppner if (i != cdata->expect.start_unit) 32958fd57520SJan Höppner pos += rpt_max - count; 32968fd57520SJan Höppner } 32978fd57520SJan Höppner 32988fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 32998fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 33008fd57520SJan Höppner 33018fd57520SJan Höppner /* Count and check number of records */ 33028fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 33038fd57520SJan Höppner 33048fd57520SJan Höppner if (count < rpt_exp) { 33058fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 33068fd57520SJan Höppner break; 33078fd57520SJan Höppner } 33088fd57520SJan Höppner if (count > rpt_exp) { 33098fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 33108fd57520SJan Höppner break; 33118fd57520SJan Höppner } 33128fd57520SJan Höppner 33138fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 33148fd57520SJan Höppner blksize = cdata->expect.blksize; 33158fd57520SJan Höppner kl = 0; 33168fd57520SJan Höppner 33178fd57520SJan Höppner /* 33188fd57520SJan Höppner * Set special values when checking CDL formatted 33198fd57520SJan Höppner * devices. 33208fd57520SJan Höppner */ 33218fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 33228fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 33238fd57520SJan Höppner if (j < 3) { 33248fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 33258fd57520SJan Höppner kl = 4; 33268fd57520SJan Höppner } 33278fd57520SJan Höppner } 33288fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 33298fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 33308fd57520SJan Höppner blksize = LABEL_SIZE - 44; 33318fd57520SJan Höppner kl = 44; 33328fd57520SJan Höppner } 33338fd57520SJan Höppner 33348fd57520SJan Höppner /* Check blocksize */ 33358fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 33368fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 33378fd57520SJan Höppner goto out; 33388fd57520SJan Höppner } 33398fd57520SJan Höppner /* Check if key length is 0 */ 33408fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 33418fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 33428fd57520SJan Höppner goto out; 33438fd57520SJan Höppner } 33448fd57520SJan Höppner /* Check if record_id is correct */ 33458fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 33468fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 33478fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 33488fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 33498fd57520SJan Höppner goto out; 33508fd57520SJan Höppner } 33518fd57520SJan Höppner } 33528fd57520SJan Höppner } 33538fd57520SJan Höppner 33548fd57520SJan Höppner out: 33558fd57520SJan Höppner /* 33568fd57520SJan Höppner * In case of no errors, we need to decrease by one 33578fd57520SJan Höppner * to get the correct positions. 33588fd57520SJan Höppner */ 33598fd57520SJan Höppner if (!cdata->result) { 33608fd57520SJan Höppner i--; 33618fd57520SJan Höppner pos--; 33628fd57520SJan Höppner } 33638fd57520SJan Höppner 33648fd57520SJan Höppner cdata->unit = i; 33658fd57520SJan Höppner cdata->num_records = count; 33668fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 33678fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 33688fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 33698fd57520SJan Höppner } 33708fd57520SJan Höppner 33718fd57520SJan Höppner /* 33728fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 33738fd57520SJan Höppner */ 33748fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 33758fd57520SJan Höppner struct format_check_t *cdata, 33768fd57520SJan Höppner int enable_pav) 33778fd57520SJan Höppner { 33788fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 33798fd57520SJan Höppner struct eckd_count *fmt_buffer; 33808fd57520SJan Höppner struct irb irb; 33818fd57520SJan Höppner int rpt_max, rpt_exp; 33828fd57520SJan Höppner int fmt_buffer_size; 33838fd57520SJan Höppner int trk_per_cyl; 33848fd57520SJan Höppner int trkcount; 33858fd57520SJan Höppner int tpm = 0; 33868fd57520SJan Höppner int rc; 33878fd57520SJan Höppner 33888fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 33898fd57520SJan Höppner 33908fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 33918fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 33928fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 33938fd57520SJan Höppner 33948fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 33958fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 33968fd57520SJan Höppner 33978fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 33988fd57520SJan Höppner if (!fmt_buffer) 33998fd57520SJan Höppner return -ENOMEM; 34008fd57520SJan Höppner 34018fd57520SJan Höppner /* 34028fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 34038fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 34048fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 34058fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 34068fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 34078fd57520SJan Höppner * processed using command mode. 34088fd57520SJan Höppner */ 34098fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 34108fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 34118fd57520SJan Höppner tpm = 1; 34128fd57520SJan Höppner 34138fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 34148fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 34158fd57520SJan Höppner if (rc && rc != -EIO) 34168fd57520SJan Höppner goto out; 34178fd57520SJan Höppner if (rc == -EIO) { 34188fd57520SJan Höppner /* 34198fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 34208fd57520SJan Höppner * with an incorrect length error, we're going to retry the 34218fd57520SJan Höppner * check with command mode. 34228fd57520SJan Höppner */ 34238fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 34248fd57520SJan Höppner tpm = 0; 34258fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 34268fd57520SJan Höppner enable_pav, tpm, 34278fd57520SJan Höppner fmt_buffer, rpt_max, 34288fd57520SJan Höppner &irb); 34298fd57520SJan Höppner if (rc) 34308fd57520SJan Höppner goto out; 34318fd57520SJan Höppner } else { 34328fd57520SJan Höppner goto out; 34338fd57520SJan Höppner } 34348fd57520SJan Höppner } 34358fd57520SJan Höppner 34368fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 34378fd57520SJan Höppner trk_per_cyl, tpm); 34388fd57520SJan Höppner 34398fd57520SJan Höppner out: 34408fd57520SJan Höppner kfree(fmt_buffer); 34418fd57520SJan Höppner 34428fd57520SJan Höppner return rc; 3443570d237cSJan Höppner } 3444570d237cSJan Höppner 34458e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 34461da177e4SLinus Torvalds { 3447a2ace466SHannes Reinecke if (cqr->retries < 0) { 3448a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3449a2ace466SHannes Reinecke return; 3450a2ace466SHannes Reinecke } 34518e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 34528e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 34538e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 34548e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3455c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 34561da177e4SLinus Torvalds } 34578e09f215SStefan Weinhuber }; 34581da177e4SLinus Torvalds 34591da177e4SLinus Torvalds static dasd_erp_fn_t 34601da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 34611da177e4SLinus Torvalds { 34628e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 34631da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 34641da177e4SLinus Torvalds 34651da177e4SLinus Torvalds switch (cdev->id.cu_type) { 34661da177e4SLinus Torvalds case 0x3990: 34671da177e4SLinus Torvalds case 0x2105: 34681da177e4SLinus Torvalds case 0x2107: 34691da177e4SLinus Torvalds case 0x1750: 34701da177e4SLinus Torvalds return dasd_3990_erp_action; 34711da177e4SLinus Torvalds case 0x9343: 34721da177e4SLinus Torvalds case 0x3880: 34731da177e4SLinus Torvalds default: 34741da177e4SLinus Torvalds return dasd_default_erp_action; 34751da177e4SLinus Torvalds } 34761da177e4SLinus Torvalds } 34771da177e4SLinus Torvalds 34781da177e4SLinus Torvalds static dasd_erp_fn_t 34791da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 34801da177e4SLinus Torvalds { 34811da177e4SLinus Torvalds return dasd_default_erp_postaction; 34821da177e4SLinus Torvalds } 34831da177e4SLinus Torvalds 34845a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 34855a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 34868e09f215SStefan Weinhuber struct irb *irb) 34878e09f215SStefan Weinhuber { 34888e09f215SStefan Weinhuber char mask; 3489f3eb5384SStefan Weinhuber char *sense = NULL; 3490543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 34918e09f215SStefan Weinhuber 34928e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 34938e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3494f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3495c8d1c0ffSStefan Haberland /* 3496c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3497c8d1c0ffSStefan Haberland * and only if not suspended 3498c8d1c0ffSStefan Haberland */ 3499501183f2SStefan Haberland if (!device->block && private->lcu && 350025e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3501c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3502c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3503501183f2SStefan Haberland /* schedule worker to reload device */ 3504501183f2SStefan Haberland dasd_reload_device(device); 3505501183f2SStefan Haberland } 35068e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 35078e09f215SStefan Weinhuber return; 35088e09f215SStefan Weinhuber } 35098e09f215SStefan Weinhuber 3510a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 35115a27e60dSStefan Weinhuber if (!sense) 35125a27e60dSStefan Weinhuber return; 35135a27e60dSStefan Weinhuber 35145a27e60dSStefan Weinhuber /* summary unit check */ 3515c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3516a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 351759a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 351859a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 351959a9ed5fSStefan Haberland "eckd suc: device already notified"); 352059a9ed5fSStefan Haberland return; 352159a9ed5fSStefan Haberland } 352259a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 352359a9ed5fSStefan Haberland if (!sense) { 352459a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 352559a9ed5fSStefan Haberland "eckd suc: no reason code available"); 352659a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 352759a9ed5fSStefan Haberland return; 352859a9ed5fSStefan Haberland 352959a9ed5fSStefan Haberland } 353059a9ed5fSStefan Haberland private->suc_reason = sense[8]; 353159a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 353259a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 353359a9ed5fSStefan Haberland private->suc_reason); 353459a9ed5fSStefan Haberland dasd_get_device(device); 353559a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 353659a9ed5fSStefan Haberland dasd_put_device(device); 353759a9ed5fSStefan Haberland 35388e09f215SStefan Weinhuber return; 35398e09f215SStefan Weinhuber } 35408e09f215SStefan Weinhuber 3541f60c768cSStefan Haberland /* service information message SIM */ 35425a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3543f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3544f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3545f60c768cSStefan Haberland return; 3546f60c768cSStefan Haberland } 3547f60c768cSStefan Haberland 35485a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 35495a27e60dSStefan Weinhuber * as alias devices may be used with several bases 35505a27e60dSStefan Weinhuber */ 3551c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3552c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 35535a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 35545a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 35555a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 35565a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 35575a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 35585a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 35595a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3560ada3df91SStefan Haberland } 35615a27e60dSStefan Weinhuber } 3562f3eb5384SStefan Weinhuber 356391dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 356491dc4a19SJan Höppner unsigned int first_trk, 356591dc4a19SJan Höppner unsigned int last_trk) 356691dc4a19SJan Höppner { 356791dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 356891dc4a19SJan Höppner unsigned int trks_per_vol; 356991dc4a19SJan Höppner int rc = 0; 357091dc4a19SJan Höppner 357191dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 357291dc4a19SJan Höppner 357391dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 357491dc4a19SJan Höppner dev_warn(&device->cdev->dev, 357591dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 357691dc4a19SJan Höppner first_trk); 357791dc4a19SJan Höppner rc = -EINVAL; 357891dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 357991dc4a19SJan Höppner dev_warn(&device->cdev->dev, 358091dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 358191dc4a19SJan Höppner last_trk); 358291dc4a19SJan Höppner rc = -EINVAL; 358391dc4a19SJan Höppner } else if (first_trk > last_trk) { 358491dc4a19SJan Höppner dev_warn(&device->cdev->dev, 358591dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 358691dc4a19SJan Höppner first_trk); 358791dc4a19SJan Höppner rc = -EINVAL; 358891dc4a19SJan Höppner } 358991dc4a19SJan Höppner return rc; 359091dc4a19SJan Höppner } 359191dc4a19SJan Höppner 359291dc4a19SJan Höppner /* 359391dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 359491dc4a19SJan Höppner * with extent alignment in mind. 359591dc4a19SJan Höppner */ 359691dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 359791dc4a19SJan Höppner { 359891dc4a19SJan Höppner int cur_pos = 0; 359991dc4a19SJan Höppner int count = 0; 360091dc4a19SJan Höppner int tmp; 360191dc4a19SJan Höppner 360291dc4a19SJan Höppner if (from == to) 360391dc4a19SJan Höppner return 1; 360491dc4a19SJan Höppner 360591dc4a19SJan Höppner /* Count first partial extent */ 360691dc4a19SJan Höppner if (from % trks_per_ext != 0) { 360791dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 360891dc4a19SJan Höppner if (tmp > to) 360991dc4a19SJan Höppner tmp = to; 361091dc4a19SJan Höppner cur_pos = tmp - from + 1; 361191dc4a19SJan Höppner count++; 361291dc4a19SJan Höppner } 361391dc4a19SJan Höppner /* Count full extents */ 361491dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 361591dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 361691dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 361791dc4a19SJan Höppner cur_pos = tmp; 361891dc4a19SJan Höppner } 361991dc4a19SJan Höppner /* Count last partial extent */ 362091dc4a19SJan Höppner if (cur_pos < to) 362191dc4a19SJan Höppner count++; 362291dc4a19SJan Höppner 362391dc4a19SJan Höppner return count; 362491dc4a19SJan Höppner } 362591dc4a19SJan Höppner 362691dc4a19SJan Höppner /* 362791dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 362891dc4a19SJan Höppner */ 362991dc4a19SJan Höppner static struct dasd_ccw_req * 363091dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 363191dc4a19SJan Höppner struct request *req, unsigned int first_trk, 363291dc4a19SJan Höppner unsigned int last_trk, int by_extent) 363391dc4a19SJan Höppner { 363491dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 363591dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 363691dc4a19SJan Höppner struct dasd_rssd_features *features; 363791dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 363891dc4a19SJan Höppner u16 heads, beg_head, end_head; 363991dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 364091dc4a19SJan Höppner struct dasd_ccw_req *cqr; 364191dc4a19SJan Höppner u32 beg_cyl, end_cyl; 364291dc4a19SJan Höppner struct ccw1 *ccw; 364391dc4a19SJan Höppner int trks_per_ext; 364491dc4a19SJan Höppner size_t ras_size; 364591dc4a19SJan Höppner size_t size; 364691dc4a19SJan Höppner int nr_exts; 364791dc4a19SJan Höppner void *rq; 364891dc4a19SJan Höppner int i; 364991dc4a19SJan Höppner 365091dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 365191dc4a19SJan Höppner return ERR_PTR(-EINVAL); 365291dc4a19SJan Höppner 365391dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 365491dc4a19SJan Höppner 365591dc4a19SJan Höppner features = &private->features; 365691dc4a19SJan Höppner 365791dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 365891dc4a19SJan Höppner nr_exts = 0; 365991dc4a19SJan Höppner if (by_extent) 366091dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 366191dc4a19SJan Höppner ras_size = sizeof(*ras_data); 366291dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 366391dc4a19SJan Höppner 366491dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 366591dc4a19SJan Höppner if (IS_ERR(cqr)) { 366691dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 366791dc4a19SJan Höppner "Could not allocate RAS request"); 366891dc4a19SJan Höppner return cqr; 366991dc4a19SJan Höppner } 367091dc4a19SJan Höppner 367191dc4a19SJan Höppner ras_data = cqr->data; 367291dc4a19SJan Höppner memset(ras_data, 0, size); 367391dc4a19SJan Höppner 367491dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 367591dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 367691dc4a19SJan Höppner /* Release specified extents or entire volume */ 367791dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 367891dc4a19SJan Höppner /* 367991dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 368091dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 368191dc4a19SJan Höppner * subset. 368291dc4a19SJan Höppner */ 368391dc4a19SJan Höppner ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 368491dc4a19SJan Höppner ras_data->lss = private->ned->ID; 368591dc4a19SJan Höppner ras_data->dev_addr = private->ned->unit_addr; 368691dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 368791dc4a19SJan Höppner 368891dc4a19SJan Höppner if (by_extent) { 368991dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 369091dc4a19SJan Höppner cur_from_trk = first_trk; 369191dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 369291dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 369391dc4a19SJan Höppner if (cur_to_trk > last_trk) 369491dc4a19SJan Höppner cur_to_trk = last_trk; 369591dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 369691dc4a19SJan Höppner 369791dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 369891dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 369991dc4a19SJan Höppner beg_head = cur_from_trk % heads; 370091dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 370191dc4a19SJan Höppner end_head = cur_to_trk % heads; 370291dc4a19SJan Höppner 370391dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 370491dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 370591dc4a19SJan Höppner 370691dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 370791dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 370891dc4a19SJan Höppner if (cur_to_trk > last_trk) 370991dc4a19SJan Höppner cur_to_trk = last_trk; 371091dc4a19SJan Höppner ras_range++; 371191dc4a19SJan Höppner } 371291dc4a19SJan Höppner } 371391dc4a19SJan Höppner 371491dc4a19SJan Höppner ccw = cqr->cpaddr; 371591dc4a19SJan Höppner ccw->cda = (__u32)(addr_t)cqr->data; 371691dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 371791dc4a19SJan Höppner ccw->count = size; 371891dc4a19SJan Höppner 371991dc4a19SJan Höppner cqr->startdev = device; 372091dc4a19SJan Höppner cqr->memdev = device; 372191dc4a19SJan Höppner cqr->block = block; 372291dc4a19SJan Höppner cqr->retries = 256; 372391dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 372491dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 372591dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 372691dc4a19SJan Höppner 372791dc4a19SJan Höppner return cqr; 372891dc4a19SJan Höppner } 372991dc4a19SJan Höppner 373091dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 373191dc4a19SJan Höppner { 373291dc4a19SJan Höppner struct dasd_ccw_req *cqr; 373391dc4a19SJan Höppner int rc; 373491dc4a19SJan Höppner 373591dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 373691dc4a19SJan Höppner if (IS_ERR(cqr)) 373791dc4a19SJan Höppner return PTR_ERR(cqr); 373891dc4a19SJan Höppner 373991dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 374091dc4a19SJan Höppner 374191dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 374291dc4a19SJan Höppner 374391dc4a19SJan Höppner return rc; 374491dc4a19SJan Höppner } 374591dc4a19SJan Höppner 374691dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 374791dc4a19SJan Höppner unsigned int from, unsigned int to) 374891dc4a19SJan Höppner { 374991dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 375091dc4a19SJan Höppner struct dasd_block *block = device->block; 375191dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 375291dc4a19SJan Höppner struct list_head ras_queue; 375391dc4a19SJan Höppner unsigned int device_exts; 375491dc4a19SJan Höppner int trks_per_ext; 375591dc4a19SJan Höppner int stop, step; 375691dc4a19SJan Höppner int cur_pos; 375791dc4a19SJan Höppner int rc = 0; 375891dc4a19SJan Höppner int retry; 375991dc4a19SJan Höppner 376091dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 376191dc4a19SJan Höppner 376291dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 376391dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 376491dc4a19SJan Höppner 376591dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 376691dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 376791dc4a19SJan Höppner cur_pos = from; 376891dc4a19SJan Höppner 376991dc4a19SJan Höppner do { 377091dc4a19SJan Höppner retry = 0; 377191dc4a19SJan Höppner while (cur_pos < to) { 377291dc4a19SJan Höppner stop = cur_pos + step - 377391dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 377491dc4a19SJan Höppner if (stop > to) 377591dc4a19SJan Höppner stop = to; 377691dc4a19SJan Höppner 377791dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 377891dc4a19SJan Höppner if (IS_ERR(cqr)) { 377991dc4a19SJan Höppner rc = PTR_ERR(cqr); 378091dc4a19SJan Höppner if (rc == -ENOMEM) { 378191dc4a19SJan Höppner if (list_empty(&ras_queue)) 378291dc4a19SJan Höppner goto out; 378391dc4a19SJan Höppner retry = 1; 378491dc4a19SJan Höppner break; 378591dc4a19SJan Höppner } 378691dc4a19SJan Höppner goto err_out; 378791dc4a19SJan Höppner } 378891dc4a19SJan Höppner 378991dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 379091dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 379191dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 379291dc4a19SJan Höppner cur_pos = stop + 1; 379391dc4a19SJan Höppner } 379491dc4a19SJan Höppner 379591dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 379691dc4a19SJan Höppner 379791dc4a19SJan Höppner err_out: 379891dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 379991dc4a19SJan Höppner device = cqr->startdev; 380091dc4a19SJan Höppner private = device->private; 380191dc4a19SJan Höppner 380291dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 380391dc4a19SJan Höppner list_del_init(&cqr->blocklist); 380491dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 380591dc4a19SJan Höppner dasd_sfree_request(cqr, device); 380691dc4a19SJan Höppner private->count--; 380791dc4a19SJan Höppner } 380891dc4a19SJan Höppner } while (retry); 380991dc4a19SJan Höppner 381091dc4a19SJan Höppner out: 381191dc4a19SJan Höppner return rc; 381291dc4a19SJan Höppner } 381391dc4a19SJan Höppner 381491dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 381591dc4a19SJan Höppner struct format_data_t *rdata) 381691dc4a19SJan Höppner { 381791dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 381891dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 381991dc4a19SJan Höppner else if (rdata->intensity == 0) 382091dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 382191dc4a19SJan Höppner rdata->stop_unit); 382291dc4a19SJan Höppner else 382391dc4a19SJan Höppner return -EINVAL; 382491dc4a19SJan Höppner } 382591dc4a19SJan Höppner 3826f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3827f3eb5384SStefan Weinhuber struct dasd_device *startdev, 38288e09f215SStefan Weinhuber struct dasd_block *block, 3829f3eb5384SStefan Weinhuber struct request *req, 3830f3eb5384SStefan Weinhuber sector_t first_rec, 3831f3eb5384SStefan Weinhuber sector_t last_rec, 3832f3eb5384SStefan Weinhuber sector_t first_trk, 3833f3eb5384SStefan Weinhuber sector_t last_trk, 3834f3eb5384SStefan Weinhuber unsigned int first_offs, 3835f3eb5384SStefan Weinhuber unsigned int last_offs, 3836f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3837f3eb5384SStefan Weinhuber unsigned int blksize) 38381da177e4SLinus Torvalds { 38391da177e4SLinus Torvalds struct dasd_eckd_private *private; 38401da177e4SLinus Torvalds unsigned long *idaws; 38411da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 38421da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 38431da177e4SLinus Torvalds struct ccw1 *ccw; 38445705f702SNeilBrown struct req_iterator iter; 38457988613bSKent Overstreet struct bio_vec bv; 38461da177e4SLinus Torvalds char *dst; 3847f3eb5384SStefan Weinhuber unsigned int off; 38481da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3849f3eb5384SStefan Weinhuber sector_t recid; 38501da177e4SLinus Torvalds unsigned char cmd, rcmd; 38518e09f215SStefan Weinhuber int use_prefix; 38528e09f215SStefan Weinhuber struct dasd_device *basedev; 38531da177e4SLinus Torvalds 38548e09f215SStefan Weinhuber basedev = block->base; 3855543691a4SSebastian Ott private = basedev->private; 38561da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 38571da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 38581da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 38591da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 38601da177e4SLinus Torvalds else 38611da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3862f3eb5384SStefan Weinhuber 38631da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 38641da177e4SLinus Torvalds count = 0; 38651da177e4SLinus Torvalds cidaw = 0; 38665705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 38677988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 38681da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 38691da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 38707988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 38717988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 38727988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 38731da177e4SLinus Torvalds } 38741da177e4SLinus Torvalds /* Paranoia. */ 38751da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 38761da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 38778e09f215SStefan Weinhuber 38788e09f215SStefan Weinhuber /* use the prefix command if available */ 38798e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 38808e09f215SStefan Weinhuber if (use_prefix) { 38818e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 38828e09f215SStefan Weinhuber cplength = 2 + count; 38838e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 38848e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 38858e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 38868e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 38878e09f215SStefan Weinhuber } else { 38881da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 38891da177e4SLinus Torvalds cplength = 2 + count; 38901da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 38918e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 38928e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 38931da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 38948e09f215SStefan Weinhuber } 38951da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 38961da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 38971da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 38981da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 38991da177e4SLinus Torvalds cplength += count; 39001da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 39011da177e4SLinus Torvalds } 39021da177e4SLinus Torvalds /* Allocate the ccw request. */ 390368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3904c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 39051da177e4SLinus Torvalds if (IS_ERR(cqr)) 39061da177e4SLinus Torvalds return cqr; 39071da177e4SLinus Torvalds ccw = cqr->cpaddr; 39088e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 39098e09f215SStefan Weinhuber if (use_prefix) { 39108e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 39118e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 39128e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 39138e09f215SStefan Weinhuber * Try again later. 39148e09f215SStefan Weinhuber */ 39158e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3916d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3917d54853efSMartin Schwidefsky } 39188e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 39198e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 39208e09f215SStefan Weinhuber } else { 39218e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 392245f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 39238e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 39248e09f215SStefan Weinhuber * Try again later. 39258e09f215SStefan Weinhuber */ 39268e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 39278e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 39288e09f215SStefan Weinhuber } 39298e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 39308e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 39318e09f215SStefan Weinhuber } 39321da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 39331da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 39341da177e4SLinus Torvalds recid = first_rec; 39351da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 39361da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 39371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 39381da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 39398e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 39401da177e4SLinus Torvalds } 39415705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39427988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39431da177e4SLinus Torvalds if (dasd_page_cache) { 39441da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3945441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 39461da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 39477988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 39481da177e4SLinus Torvalds if (copy) 39497988613bSKent Overstreet dst = copy + bv.bv_offset; 39501da177e4SLinus Torvalds } 39517988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 39521da177e4SLinus Torvalds sector_t trkid = recid; 39531da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 39541da177e4SLinus Torvalds rcmd = cmd; 39551da177e4SLinus Torvalds count = blksize; 39561da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 39571da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 39581da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 39591da177e4SLinus Torvalds rcmd |= 0x8; 39601da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3961ec5883abSHorst Hummel if (count < blksize && 3962ec5883abSHorst Hummel rq_data_dir(req) == READ) 39631da177e4SLinus Torvalds memset(dst + count, 0xe5, 39641da177e4SLinus Torvalds blksize - count); 39651da177e4SLinus Torvalds } 39661da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 39671da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 39681da177e4SLinus Torvalds trkid, recoffs + 1, 39698e09f215SStefan Weinhuber 1, rcmd, basedev, count); 39701da177e4SLinus Torvalds } 39711da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 39721da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 39731da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 39741da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 39751da177e4SLinus Torvalds trkid, recoffs + 1, 39761da177e4SLinus Torvalds last_rec - recid + 1, 39778e09f215SStefan Weinhuber cmd, basedev, count); 39781da177e4SLinus Torvalds } 39791da177e4SLinus Torvalds /* Read/write ccw. */ 39801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 39811da177e4SLinus Torvalds ccw->cmd_code = rcmd; 39821da177e4SLinus Torvalds ccw->count = count; 39831da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 39841da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 39851da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 39861da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 39871da177e4SLinus Torvalds } else { 39881da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 39891da177e4SLinus Torvalds ccw->flags = 0; 39901da177e4SLinus Torvalds } 39911da177e4SLinus Torvalds ccw++; 39921da177e4SLinus Torvalds dst += blksize; 39931da177e4SLinus Torvalds recid++; 39941da177e4SLinus Torvalds } 39951da177e4SLinus Torvalds } 399613de227bSHolger Smolinski if (blk_noretry_request(req) || 399713de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 39981c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 39998e09f215SStefan Weinhuber cqr->startdev = startdev; 40008e09f215SStefan Weinhuber cqr->memdev = startdev; 40018e09f215SStefan Weinhuber cqr->block = block; 40027c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4003c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 40041f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 40051aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 40061da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 40075e2b17e7SJan Höppner 40085e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 40095e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 40105e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 40115e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 40125e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 40135e2b17e7SJan Höppner } 40145e2b17e7SJan Höppner 40151da177e4SLinus Torvalds return cqr; 40161da177e4SLinus Torvalds } 40171da177e4SLinus Torvalds 4018f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4019f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4020f3eb5384SStefan Weinhuber struct dasd_block *block, 4021f3eb5384SStefan Weinhuber struct request *req, 4022f3eb5384SStefan Weinhuber sector_t first_rec, 4023f3eb5384SStefan Weinhuber sector_t last_rec, 4024f3eb5384SStefan Weinhuber sector_t first_trk, 4025f3eb5384SStefan Weinhuber sector_t last_trk, 4026f3eb5384SStefan Weinhuber unsigned int first_offs, 4027f3eb5384SStefan Weinhuber unsigned int last_offs, 4028f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4029f3eb5384SStefan Weinhuber unsigned int blksize) 4030f3eb5384SStefan Weinhuber { 4031f3eb5384SStefan Weinhuber unsigned long *idaws; 4032f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4033f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4034f3eb5384SStefan Weinhuber struct req_iterator iter; 40357988613bSKent Overstreet struct bio_vec bv; 4036f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 4037f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 4038f3eb5384SStefan Weinhuber unsigned int tlf; 4039f3eb5384SStefan Weinhuber sector_t recid; 4040f3eb5384SStefan Weinhuber unsigned char cmd; 4041f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4042f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 4043f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4044f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 4045f3eb5384SStefan Weinhuber sector_t trkid; 4046f3eb5384SStefan Weinhuber unsigned int recoffs; 4047f3eb5384SStefan Weinhuber 4048f3eb5384SStefan Weinhuber basedev = block->base; 4049f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 4050f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4051f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 4052f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4053f3eb5384SStefan Weinhuber else 4054f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4055f3eb5384SStefan Weinhuber 4056f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 4057f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 4058f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 4059f3eb5384SStefan Weinhuber * of records as upper limit. 4060f3eb5384SStefan Weinhuber */ 4061f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 4062f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4063f3eb5384SStefan Weinhuber 4064f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 4065f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 4066f3eb5384SStefan Weinhuber 40677bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4068f3eb5384SStefan Weinhuber 4069f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 407068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4071c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 4072f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4073f3eb5384SStefan Weinhuber return cqr; 4074f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4075f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4076f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4077f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4078f3eb5384SStefan Weinhuber else 4079f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4080f3eb5384SStefan Weinhuber tlf *= blksize; 4081f3eb5384SStefan Weinhuber 4082f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 4083f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 4084f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 4085f3eb5384SStefan Weinhuber trkcount, blksize, 4086f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 4087f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4088f3eb5384SStefan Weinhuber * Try again later. 4089f3eb5384SStefan Weinhuber */ 4090f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4091f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 4092f3eb5384SStefan Weinhuber } 4093f3eb5384SStefan Weinhuber 4094f3eb5384SStefan Weinhuber /* 4095f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 4096f3eb5384SStefan Weinhuber * following conditions: 4097f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 4098f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 4099f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 4100f3eb5384SStefan Weinhuber */ 4101f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 4102f3eb5384SStefan Weinhuber recid = first_rec; 4103f3eb5384SStefan Weinhuber new_track = 1; 4104f3eb5384SStefan Weinhuber end_idaw = 0; 4105f3eb5384SStefan Weinhuber len_to_track_end = 0; 4106246ccea1SMartin Schwidefsky idaw_dst = NULL; 4107f3eb5384SStefan Weinhuber idaw_len = 0; 4108f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 41097988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 41107988613bSKent Overstreet seg_len = bv.bv_len; 4111f3eb5384SStefan Weinhuber while (seg_len) { 4112f3eb5384SStefan Weinhuber if (new_track) { 4113f3eb5384SStefan Weinhuber trkid = recid; 4114f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 4115f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 4116f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 4117f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 4118f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 4119f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4120f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 4121f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 4122f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4123f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 4124f3eb5384SStefan Weinhuber ccw++; 4125f3eb5384SStefan Weinhuber recid += count; 4126f3eb5384SStefan Weinhuber new_track = 0; 412752db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 412852db45c3SStefan Weinhuber if (!idaw_dst) 412952db45c3SStefan Weinhuber idaw_dst = dst; 4130f3eb5384SStefan Weinhuber } 413152db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 413252db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 4133f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 4134f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 4135f3eb5384SStefan Weinhuber * idaw ends 4136f3eb5384SStefan Weinhuber */ 413752db45c3SStefan Weinhuber if (!idaw_dst) { 413852db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 413952db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 414052db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 414152db45c3SStefan Weinhuber } else 4142f3eb5384SStefan Weinhuber idaw_dst = dst; 414352db45c3SStefan Weinhuber } 4144f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 4145f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4146f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 4147f3eb5384SStefan Weinhuber } 4148f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4149f3eb5384SStefan Weinhuber seg_len -= part_len; 4150f3eb5384SStefan Weinhuber dst += part_len; 4151f3eb5384SStefan Weinhuber idaw_len += part_len; 4152f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 4153f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 4154f3eb5384SStefan Weinhuber * -> create an idaw 4155f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 4156f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 4157f3eb5384SStefan Weinhuber */ 4158f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4159f3eb5384SStefan Weinhuber end_idaw = 1; 4160f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 4161f3eb5384SStefan Weinhuber if (!len_to_track_end) { 4162f3eb5384SStefan Weinhuber new_track = 1; 4163f3eb5384SStefan Weinhuber end_idaw = 1; 4164f3eb5384SStefan Weinhuber } 4165f3eb5384SStefan Weinhuber if (end_idaw) { 4166f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 4167f3eb5384SStefan Weinhuber idaw_len); 4168246ccea1SMartin Schwidefsky idaw_dst = NULL; 4169f3eb5384SStefan Weinhuber idaw_len = 0; 4170f3eb5384SStefan Weinhuber end_idaw = 0; 4171f3eb5384SStefan Weinhuber } 4172f3eb5384SStefan Weinhuber } 4173f3eb5384SStefan Weinhuber } 4174f3eb5384SStefan Weinhuber 4175f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4176f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4177f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4178f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4179f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4180f3eb5384SStefan Weinhuber cqr->block = block; 41817c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4182c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 41831f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 41841aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4185f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 41865e2b17e7SJan Höppner 41875e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 41885e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 41895e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 41905e2b17e7SJan Höppner 4191f3eb5384SStefan Weinhuber return cqr; 4192f3eb5384SStefan Weinhuber } 4193f3eb5384SStefan Weinhuber 4194f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4195f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4196f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4197f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4198f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4199f3eb5384SStefan Weinhuber unsigned int blksize, 4200f3eb5384SStefan Weinhuber unsigned int total_data_size, 4201f3eb5384SStefan Weinhuber unsigned int tlf, 4202f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4203f3eb5384SStefan Weinhuber { 4204f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4205f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4206f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4207f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4208f3eb5384SStefan Weinhuber struct dcw *dcw; 4209f3eb5384SStefan Weinhuber 4210f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4211f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4212f3eb5384SStefan Weinhuber u8 pfx_cmd; 4213f3eb5384SStefan Weinhuber 4214f3eb5384SStefan Weinhuber int rc = 0; 4215f3eb5384SStefan Weinhuber int sector = 0; 4216f3eb5384SStefan Weinhuber int dn, d; 4217f3eb5384SStefan Weinhuber 4218f3eb5384SStefan Weinhuber 4219f3eb5384SStefan Weinhuber /* setup prefix data */ 4220543691a4SSebastian Ott basepriv = basedev->private; 4221543691a4SSebastian Ott startpriv = startdev->private; 4222f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4223f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4224f3eb5384SStefan Weinhuber 4225f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4226f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4227f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 4228f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 4229f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4230f3eb5384SStefan Weinhuber 4231f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4232da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4233f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4234da340f92SStefan Haberland 4235da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4236da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4237f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4238f3eb5384SStefan Weinhuber } 4239f3eb5384SStefan Weinhuber 4240f3eb5384SStefan Weinhuber switch (cmd) { 4241f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4242f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4243f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4244f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4245f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4246f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4247f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4248f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4249f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4250f3eb5384SStefan Weinhuber break; 4251f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4252f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4253f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4254f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 42555628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4256f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4257f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4258f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4259f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4260f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 426145f186beSJan Höppner /* 426245f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 426345f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 426445f186beSJan Höppner * data as well. 426545f186beSJan Höppner */ 426645f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 426745f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4268f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4269f3eb5384SStefan Weinhuber break; 42708fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 42718fd57520SJan Höppner dedata->mask.perm = 0x1; 42728fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 42738fd57520SJan Höppner dedata->ga_extended |= 0x42; 42748fd57520SJan Höppner dedata->blk_size = blksize; 42758fd57520SJan Höppner lredata->operation.orientation = 0x2; 42768fd57520SJan Höppner lredata->operation.operation = 0x16; 42778fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 42788fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 42798fd57520SJan Höppner break; 4280f3eb5384SStefan Weinhuber default: 4281f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4282f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4283f3eb5384SStefan Weinhuber BUG(); 4284f3eb5384SStefan Weinhuber break; 4285f3eb5384SStefan Weinhuber } 4286f3eb5384SStefan Weinhuber if (rc) 4287f3eb5384SStefan Weinhuber return rc; 4288f3eb5384SStefan Weinhuber 4289f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4290f3eb5384SStefan Weinhuber 4291f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4292f3eb5384SStefan Weinhuber begcyl = trk / heads; 4293f3eb5384SStefan Weinhuber beghead = trk % heads; 4294f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4295f3eb5384SStefan Weinhuber endhead = totrk % heads; 4296f3eb5384SStefan Weinhuber 4297f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4298f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4299f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4300f3eb5384SStefan Weinhuber 4301f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4302f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4303f3eb5384SStefan Weinhuber else 4304f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4305f3eb5384SStefan Weinhuber } 4306f3eb5384SStefan Weinhuber 4307f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4308f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4309f3eb5384SStefan Weinhuber 4310f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4311f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4312f3eb5384SStefan Weinhuber 4313f3eb5384SStefan Weinhuber if (rec_on_trk) { 4314f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4315f3eb5384SStefan Weinhuber case 0x3390: 4316f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4317f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4318f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4319f3eb5384SStefan Weinhuber break; 4320f3eb5384SStefan Weinhuber case 0x3380: 4321f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4322f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4323f3eb5384SStefan Weinhuber break; 4324f3eb5384SStefan Weinhuber } 4325f3eb5384SStefan Weinhuber } 4326f3eb5384SStefan Weinhuber 43278fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 43288fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 43298fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 43308fd57520SJan Höppner lredata->sector = 0xff; 43318fd57520SJan Höppner } else { 4332f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4333f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 43348fd57520SJan Höppner lredata->sector = sector; 43358fd57520SJan Höppner } 4336f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4337f3eb5384SStefan Weinhuber lredata->length = tlf; 4338f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4339f3eb5384SStefan Weinhuber lredata->count = count; 4340f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4341f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4342f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4343f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4344f3eb5384SStefan Weinhuber 4345f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4346f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4347757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4348f3eb5384SStefan Weinhuber } 4349f3eb5384SStefan Weinhuber 4350f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4351f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4352f3eb5384SStefan Weinhuber struct dasd_block *block, 4353f3eb5384SStefan Weinhuber struct request *req, 4354f3eb5384SStefan Weinhuber sector_t first_rec, 4355f3eb5384SStefan Weinhuber sector_t last_rec, 4356f3eb5384SStefan Weinhuber sector_t first_trk, 4357f3eb5384SStefan Weinhuber sector_t last_trk, 4358f3eb5384SStefan Weinhuber unsigned int first_offs, 4359f3eb5384SStefan Weinhuber unsigned int last_offs, 4360f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4361f3eb5384SStefan Weinhuber unsigned int blksize) 4362f3eb5384SStefan Weinhuber { 4363f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4364f3eb5384SStefan Weinhuber struct req_iterator iter; 43657988613bSKent Overstreet struct bio_vec bv; 4366f3eb5384SStefan Weinhuber char *dst; 4367f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4368f3eb5384SStefan Weinhuber unsigned char cmd; 4369f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4370f3eb5384SStefan Weinhuber unsigned int tlf; 4371f3eb5384SStefan Weinhuber struct itcw *itcw; 4372f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4373f3eb5384SStefan Weinhuber int itcw_op; 4374f3eb5384SStefan Weinhuber size_t itcw_size; 4375ef19298bSStefan Weinhuber u8 tidaw_flags; 4376ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4377ef19298bSStefan Weinhuber unsigned char new_track; 4378ef19298bSStefan Weinhuber sector_t recid, trkid; 4379ef19298bSStefan Weinhuber unsigned int offs; 4380ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4381cd10502bSJulia Lawall int ret; 4382f3eb5384SStefan Weinhuber 4383f3eb5384SStefan Weinhuber basedev = block->base; 4384f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4385f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4386f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4387f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4388f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4389f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4390f3eb5384SStefan Weinhuber } else 4391f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4392f3eb5384SStefan Weinhuber 4393f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4394f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4395f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4396ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4397ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4398f3eb5384SStefan Weinhuber */ 4399f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4400f3eb5384SStefan Weinhuber ctidaw = 0; 4401f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4402f3eb5384SStefan Weinhuber ++ctidaw; 4403f3eb5384SStefan Weinhuber } 4404ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4405ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4406f3eb5384SStefan Weinhuber 4407f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4408f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4409c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4410c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4411f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4412f3eb5384SStefan Weinhuber return cqr; 4413f3eb5384SStefan Weinhuber 4414f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4415f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4416f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4417f3eb5384SStefan Weinhuber else 4418f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4419f3eb5384SStefan Weinhuber tlf *= blksize; 4420f3eb5384SStefan Weinhuber 4421f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4422ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4423cd10502bSJulia Lawall ret = -EINVAL; 4424cd10502bSJulia Lawall goto out_error; 4425ef19298bSStefan Weinhuber } 4426f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4427f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4428f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4429f3eb5384SStefan Weinhuber first_offs + 1, 4430f3eb5384SStefan Weinhuber trkcount, blksize, 4431f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4432f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4433f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4434f3eb5384SStefan Weinhuber * Try again later. 4435f3eb5384SStefan Weinhuber */ 4436cd10502bSJulia Lawall ret = -EAGAIN; 4437cd10502bSJulia Lawall goto out_error; 4438f3eb5384SStefan Weinhuber } 4439d54cddb6SHeiko Carstens len_to_track_end = 0; 4440f3eb5384SStefan Weinhuber /* 4441f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4442f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4443f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4444f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4445ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4446ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4447f3eb5384SStefan Weinhuber */ 4448ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4449ef19298bSStefan Weinhuber new_track = 1; 4450ef19298bSStefan Weinhuber recid = first_rec; 4451f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 44527988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 44537988613bSKent Overstreet seg_len = bv.bv_len; 4454ef19298bSStefan Weinhuber while (seg_len) { 4455ef19298bSStefan Weinhuber if (new_track) { 4456ef19298bSStefan Weinhuber trkid = recid; 4457ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4458ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4459ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4460ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4461ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4462ef19298bSStefan Weinhuber recid += count; 4463ef19298bSStefan Weinhuber new_track = 0; 4464f3eb5384SStefan Weinhuber } 4465ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4466ef19298bSStefan Weinhuber seg_len -= part_len; 4467ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4468ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4469ef19298bSStefan Weinhuber if (!len_to_track_end) { 4470ef19298bSStefan Weinhuber new_track = 1; 4471ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4472ef19298bSStefan Weinhuber } else 4473ef19298bSStefan Weinhuber tidaw_flags = 0; 4474ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4475ef19298bSStefan Weinhuber dst, part_len); 4476cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4477cd10502bSJulia Lawall ret = -EINVAL; 4478cd10502bSJulia Lawall goto out_error; 4479cd10502bSJulia Lawall } 4480ef19298bSStefan Weinhuber dst += part_len; 4481ef19298bSStefan Weinhuber } 4482ef19298bSStefan Weinhuber } 4483ef19298bSStefan Weinhuber } else { 4484ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 44857988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 4486ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 44877988613bSKent Overstreet dst, bv.bv_len); 4488cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4489cd10502bSJulia Lawall ret = -EINVAL; 4490cd10502bSJulia Lawall goto out_error; 4491cd10502bSJulia Lawall } 4492ef19298bSStefan Weinhuber } 4493ef19298bSStefan Weinhuber } 4494ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4495ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4496f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4497f3eb5384SStefan Weinhuber 4498f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4499f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4500f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4501ef19298bSStefan Weinhuber cqr->cpmode = 1; 4502f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4503f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4504f3eb5384SStefan Weinhuber cqr->block = block; 45057c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4506c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 45071f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 45081aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4509f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 45105e2b17e7SJan Höppner 45115e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 45125e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 45135e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 45145e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 45155e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 45165e2b17e7SJan Höppner } 45175e2b17e7SJan Höppner 4518f3eb5384SStefan Weinhuber return cqr; 4519cd10502bSJulia Lawall out_error: 4520cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4521cd10502bSJulia Lawall return ERR_PTR(ret); 4522f3eb5384SStefan Weinhuber } 4523f3eb5384SStefan Weinhuber 4524f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4525f3eb5384SStefan Weinhuber struct dasd_block *block, 4526f3eb5384SStefan Weinhuber struct request *req) 4527f3eb5384SStefan Weinhuber { 4528ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4529f3eb5384SStefan Weinhuber int use_prefix; 4530ef19298bSStefan Weinhuber int fcx_multitrack; 453145b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4532f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4533f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4534f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4535f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4536f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4537f3eb5384SStefan Weinhuber int cdlspecial; 4538ef19298bSStefan Weinhuber unsigned int data_size; 4539f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4540f3eb5384SStefan Weinhuber 4541f3eb5384SStefan Weinhuber basedev = block->base; 4542543691a4SSebastian Ott private = basedev->private; 4543f3eb5384SStefan Weinhuber 4544f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4545f3eb5384SStefan Weinhuber blksize = block->bp_block; 4546f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 45476fca97a9SStefan Haberland if (blk_per_trk == 0) 45486fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4549f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 455083096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4551f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4552f3eb5384SStefan Weinhuber last_rec = last_trk = 455383096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4554f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4555f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4556f3eb5384SStefan Weinhuber 4557ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4558ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 455926a35f37SStefan Weinhuber if (data_size % blksize) 456026a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4561ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4562ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4563ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4564f3eb5384SStefan Weinhuber 4565f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4566f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4567f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4568f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4569f3eb5384SStefan Weinhuber 4570f3eb5384SStefan Weinhuber cqr = NULL; 4571f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4572f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4573ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4574ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4575f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4576f3eb5384SStefan Weinhuber first_rec, last_rec, 4577f3eb5384SStefan Weinhuber first_trk, last_trk, 4578f3eb5384SStefan Weinhuber first_offs, last_offs, 4579f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4580ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4581ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4582f3eb5384SStefan Weinhuber cqr = NULL; 4583f3eb5384SStefan Weinhuber } else if (use_prefix && 4584f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4585f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4586f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4587f3eb5384SStefan Weinhuber first_rec, last_rec, 4588f3eb5384SStefan Weinhuber first_trk, last_trk, 4589f3eb5384SStefan Weinhuber first_offs, last_offs, 4590f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4591ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4592ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4593f3eb5384SStefan Weinhuber cqr = NULL; 4594f3eb5384SStefan Weinhuber } 4595f3eb5384SStefan Weinhuber if (!cqr) 4596f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4597f3eb5384SStefan Weinhuber first_rec, last_rec, 4598f3eb5384SStefan Weinhuber first_trk, last_trk, 4599f3eb5384SStefan Weinhuber first_offs, last_offs, 4600f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4601f3eb5384SStefan Weinhuber return cqr; 4602f3eb5384SStefan Weinhuber } 4603f3eb5384SStefan Weinhuber 4604bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4605e4dbb0f2SStefan Haberland struct dasd_block *block, 4606e4dbb0f2SStefan Haberland struct request *req) 4607e4dbb0f2SStefan Haberland { 46089d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4609e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4610e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4611558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 46129d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 46139d2be0c1SJan Höppner struct dasd_device *basedev; 46149d2be0c1SJan Höppner struct req_iterator iter; 46159d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 46169d2be0c1SJan Höppner unsigned int first_offs; 46179d2be0c1SJan Höppner unsigned int trkcount; 46189d2be0c1SJan Höppner unsigned long *idaws; 46199d2be0c1SJan Höppner unsigned int size; 46209d2be0c1SJan Höppner unsigned char cmd; 46219d2be0c1SJan Höppner struct bio_vec bv; 46229d2be0c1SJan Höppner struct ccw1 *ccw; 46239d2be0c1SJan Höppner int use_prefix; 46249d2be0c1SJan Höppner void *data; 46259d2be0c1SJan Höppner char *dst; 4626e4dbb0f2SStefan Haberland 4627e4dbb0f2SStefan Haberland /* 4628e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4629558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4630558b9ef0SStefan Weinhuber * the request with dummy pages. 4631e4dbb0f2SStefan Haberland */ 4632558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4633558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4634558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4635558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4636558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4637558b9ef0SStefan Weinhuber basedev = block->base; 4638558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4639558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4640558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4641e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4642558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 46439d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4644e4dbb0f2SStefan Haberland } 4645e4dbb0f2SStefan Haberland 4646e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4647e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4648e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4649e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4650e4dbb0f2SStefan Haberland first_offs = 0; 4651e4dbb0f2SStefan Haberland 4652e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4653e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4654e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4655e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 46569d2be0c1SJan Höppner else 46579d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4658e4dbb0f2SStefan Haberland 4659e4dbb0f2SStefan Haberland /* 4660e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4661e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4662e4dbb0f2SStefan Haberland */ 4663e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4664e4dbb0f2SStefan Haberland 4665e4dbb0f2SStefan Haberland /* 46669d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 46679d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4668e4dbb0f2SStefan Haberland */ 46699d2be0c1SJan Höppner base_priv = basedev->private; 46709d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 46719d2be0c1SJan Höppner if (use_prefix) { 46729d2be0c1SJan Höppner cplength = 1 + trkcount; 46739d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 46749d2be0c1SJan Höppner } else { 46759d2be0c1SJan Höppner cplength = 2 + trkcount; 46769d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 46779d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 46789d2be0c1SJan Höppner } 46799d2be0c1SJan Höppner size = ALIGN(size, 8); 4680e4dbb0f2SStefan Haberland 46817bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4682e4dbb0f2SStefan Haberland 4683e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4684e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4685c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4686e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 46879d2be0c1SJan Höppner return cqr; 4688e4dbb0f2SStefan Haberland 46899d2be0c1SJan Höppner ccw = cqr->cpaddr; 46909d2be0c1SJan Höppner data = cqr->data; 46919d2be0c1SJan Höppner 46929d2be0c1SJan Höppner if (use_prefix) { 46939d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 46949d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 46959d2be0c1SJan Höppner } else { 46969d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 46979d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 46989d2be0c1SJan Höppner 46999d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 47009d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 47019d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4702e4dbb0f2SStefan Haberland } 4703e4dbb0f2SStefan Haberland 47049d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4705e4dbb0f2SStefan Haberland len_to_track_end = 0; 4706558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4707558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4708558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4709558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4710558b9ef0SStefan Weinhuber ccw->count = 57326; 4711558b9ef0SStefan Weinhuber /* 64k map to one track */ 4712558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4713558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4714558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4715558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4716558b9ef0SStefan Weinhuber ccw++; 4717558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4718558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4719558b9ef0SStefan Weinhuber } 4720e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 47217988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 47227988613bSKent Overstreet seg_len = bv.bv_len; 4723558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4724558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4725e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4726e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4727e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4728e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4729e4dbb0f2SStefan Haberland ccw->count = 57326; 4730e4dbb0f2SStefan Haberland /* 64k map to one track */ 4731e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4732e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4733e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4734e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4735e4dbb0f2SStefan Haberland ccw++; 4736e4dbb0f2SStefan Haberland } 4737e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4738e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4739e4dbb0f2SStefan Haberland } 4740558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4741558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4742e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4743e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4744e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4745e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4746e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4747e4dbb0f2SStefan Haberland cqr->block = block; 4748e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4749c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 47501f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 47511aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4752e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4753e4dbb0f2SStefan Haberland 4754e4dbb0f2SStefan Haberland return cqr; 4755e4dbb0f2SStefan Haberland } 4756e4dbb0f2SStefan Haberland 4757e4dbb0f2SStefan Haberland 47581da177e4SLinus Torvalds static int 47591da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 47601da177e4SLinus Torvalds { 47611da177e4SLinus Torvalds struct dasd_eckd_private *private; 47621da177e4SLinus Torvalds struct ccw1 *ccw; 47635705f702SNeilBrown struct req_iterator iter; 47647988613bSKent Overstreet struct bio_vec bv; 47651da177e4SLinus Torvalds char *dst, *cda; 47661da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 47671da177e4SLinus Torvalds sector_t recid; 47685705f702SNeilBrown int status; 47691da177e4SLinus Torvalds 47701da177e4SLinus Torvalds if (!dasd_page_cache) 47711da177e4SLinus Torvalds goto out; 4772543691a4SSebastian Ott private = cqr->block->base->private; 47738e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 47741da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 477583096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 47761da177e4SLinus Torvalds ccw = cqr->cpaddr; 47771da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 47781da177e4SLinus Torvalds ccw++; 47791da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 47801da177e4SLinus Torvalds ccw++; 47815705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 47827988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 47837988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 47841da177e4SLinus Torvalds /* Skip locate record. */ 47851da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 47861da177e4SLinus Torvalds ccw++; 47871da177e4SLinus Torvalds if (dst) { 47881da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 47891da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 47901da177e4SLinus Torvalds else 47911da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 47921da177e4SLinus Torvalds if (dst != cda) { 47931da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 47947988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 47951da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 47961da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 47971da177e4SLinus Torvalds } 47981da177e4SLinus Torvalds dst = NULL; 47991da177e4SLinus Torvalds } 48001da177e4SLinus Torvalds ccw++; 48011da177e4SLinus Torvalds recid++; 48021da177e4SLinus Torvalds } 48031da177e4SLinus Torvalds } 48041da177e4SLinus Torvalds out: 48051da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 48068e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48071da177e4SLinus Torvalds return status; 48081da177e4SLinus Torvalds } 48091da177e4SLinus Torvalds 48108e09f215SStefan Weinhuber /* 4811f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 48128e09f215SStefan Weinhuber * 48138e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 48148e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 48158e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 48168e09f215SStefan Weinhuber */ 48178e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 48188e09f215SStefan Weinhuber { 48198e09f215SStefan Weinhuber struct ccw1 *ccw; 48208e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4821f3eb5384SStefan Weinhuber struct tcw *tcw; 4822f3eb5384SStefan Weinhuber struct tccb *tccb; 4823f3eb5384SStefan Weinhuber struct dcw *dcw; 48248e09f215SStefan Weinhuber 4825f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4826f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4827f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4828f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4829f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4830f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4831f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4832f3eb5384SStefan Weinhuber } else { 48338e09f215SStefan Weinhuber ccw = cqr->cpaddr; 48348e09f215SStefan Weinhuber pfxdata = cqr->data; 48358e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 48368e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 48378e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 48388e09f215SStefan Weinhuber } 48398e09f215SStefan Weinhuber } 4840f3eb5384SStefan Weinhuber } 48418e09f215SStefan Weinhuber 48428e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 48438e09f215SStefan Weinhuber 48448e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 48458e09f215SStefan Weinhuber struct dasd_block *block, 48468e09f215SStefan Weinhuber struct request *req) 48478e09f215SStefan Weinhuber { 48488e09f215SStefan Weinhuber struct dasd_eckd_private *private; 4849964ce509SStefan Haberland struct dasd_device *startdev; 48507e64db15SJan Höppner unsigned long flags; 4851964ce509SStefan Haberland struct dasd_ccw_req *cqr; 48528e09f215SStefan Weinhuber 48538e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 48548e09f215SStefan Weinhuber if (!startdev) 48558e09f215SStefan Weinhuber startdev = base; 4856543691a4SSebastian Ott private = startdev->private; 48578e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 48588e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 48598e09f215SStefan Weinhuber 48608e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 48618e09f215SStefan Weinhuber private->count++; 4862e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4863bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4864e4dbb0f2SStefan Haberland else 48658e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 48668e09f215SStefan Weinhuber if (IS_ERR(cqr)) 48678e09f215SStefan Weinhuber private->count--; 48688e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 48698e09f215SStefan Weinhuber return cqr; 48708e09f215SStefan Weinhuber } 48718e09f215SStefan Weinhuber 48728e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 48738e09f215SStefan Weinhuber struct request *req) 48748e09f215SStefan Weinhuber { 48758e09f215SStefan Weinhuber struct dasd_eckd_private *private; 48768e09f215SStefan Weinhuber unsigned long flags; 48778e09f215SStefan Weinhuber 48788e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4879543691a4SSebastian Ott private = cqr->memdev->private; 48808e09f215SStefan Weinhuber private->count--; 48818e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 48828e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 48838e09f215SStefan Weinhuber } 48848e09f215SStefan Weinhuber 48851da177e4SLinus Torvalds static int 48861da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 48871da177e4SLinus Torvalds struct dasd_information2_t * info) 48881da177e4SLinus Torvalds { 4889543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 48901da177e4SLinus Torvalds 48911da177e4SLinus Torvalds info->label_block = 2; 48921da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 48931da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4894543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 48951da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4896543691a4SSebastian Ott sizeof(private->rdc_data)); 48974abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 48984abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 48994abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 49004abb08c2SStefan Weinhuber info->confdata_size); 49011da177e4SLinus Torvalds return 0; 49021da177e4SLinus Torvalds } 49031da177e4SLinus Torvalds 49041da177e4SLinus Torvalds /* 49051da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 49061da177e4SLinus Torvalds */ 49071da177e4SLinus Torvalds 49081da177e4SLinus Torvalds /* 49091da177e4SLinus Torvalds * Release device ioctl. 49101da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 49111da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 49121da177e4SLinus Torvalds */ 49131da177e4SLinus Torvalds static int 49141107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 49151da177e4SLinus Torvalds { 49161da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 49171da177e4SLinus Torvalds int rc; 4918f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4919f932bceaSStefan Weinhuber int useglobal; 49201da177e4SLinus Torvalds 49211da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 49221da177e4SLinus Torvalds return -EACCES; 49231da177e4SLinus Torvalds 4924f932bceaSStefan Weinhuber useglobal = 0; 4925c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 49261da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4927f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4928f932bceaSStefan Weinhuber useglobal = 1; 4929f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4930f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4931f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4932f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4933f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4934f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4935f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 49361da177e4SLinus Torvalds } 4937f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4938f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4939f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4940f3eb5384SStefan Weinhuber ccw->count = 32; 4941f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 49428e09f215SStefan Weinhuber cqr->startdev = device; 49438e09f215SStefan Weinhuber cqr->memdev = device; 49441da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 49451c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4946336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 49471da177e4SLinus Torvalds cqr->expires = 2 * HZ; 49481aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 49491da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 49501da177e4SLinus Torvalds 49511da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 49525a27e60dSStefan Weinhuber if (!rc) 49535a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 49541da177e4SLinus Torvalds 4955f932bceaSStefan Weinhuber if (useglobal) 4956f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4957f932bceaSStefan Weinhuber else 49588e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 49591da177e4SLinus Torvalds return rc; 49601da177e4SLinus Torvalds } 49611da177e4SLinus Torvalds 49621da177e4SLinus Torvalds /* 49631da177e4SLinus Torvalds * Reserve device ioctl. 49641da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 49651da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 49661da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 49671da177e4SLinus Torvalds */ 49681da177e4SLinus Torvalds static int 49691107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 49701da177e4SLinus Torvalds { 49711da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 49721da177e4SLinus Torvalds int rc; 4973f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4974f932bceaSStefan Weinhuber int useglobal; 49751da177e4SLinus Torvalds 49761da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 49771da177e4SLinus Torvalds return -EACCES; 49781da177e4SLinus Torvalds 4979f932bceaSStefan Weinhuber useglobal = 0; 4980c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 49811da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4982f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4983f932bceaSStefan Weinhuber useglobal = 1; 4984f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4985f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4986f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4987f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4988f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4989f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4990f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 49911da177e4SLinus Torvalds } 4992f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4993f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4994f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4995f3eb5384SStefan Weinhuber ccw->count = 32; 4996f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 49978e09f215SStefan Weinhuber cqr->startdev = device; 49988e09f215SStefan Weinhuber cqr->memdev = device; 49991da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50001c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5001336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50021da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50031aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50041da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50051da177e4SLinus Torvalds 50061da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50075a27e60dSStefan Weinhuber if (!rc) 50085a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50091da177e4SLinus Torvalds 5010f932bceaSStefan Weinhuber if (useglobal) 5011f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5012f932bceaSStefan Weinhuber else 50138e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50141da177e4SLinus Torvalds return rc; 50151da177e4SLinus Torvalds } 50161da177e4SLinus Torvalds 50171da177e4SLinus Torvalds /* 50181da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 50191da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 50201da177e4SLinus Torvalds * (unconditional reserve) 50211da177e4SLinus Torvalds */ 50221da177e4SLinus Torvalds static int 50231107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 50241da177e4SLinus Torvalds { 50251da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50261da177e4SLinus Torvalds int rc; 5027f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5028f932bceaSStefan Weinhuber int useglobal; 50291da177e4SLinus Torvalds 50301da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50311da177e4SLinus Torvalds return -EACCES; 50321da177e4SLinus Torvalds 5033f932bceaSStefan Weinhuber useglobal = 0; 5034c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50351da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5036f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5037f932bceaSStefan Weinhuber useglobal = 1; 5038f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5039f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5040f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5041f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5042f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5043f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5044f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50451da177e4SLinus Torvalds } 5046f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5047f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5048f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5049f3eb5384SStefan Weinhuber ccw->count = 32; 5050f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 50518e09f215SStefan Weinhuber cqr->startdev = device; 50528e09f215SStefan Weinhuber cqr->memdev = device; 50531da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50541c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5055336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50561da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50571aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50581da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50591da177e4SLinus Torvalds 50601da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50615a27e60dSStefan Weinhuber if (!rc) 50625a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50631da177e4SLinus Torvalds 5064f932bceaSStefan Weinhuber if (useglobal) 5065f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5066f932bceaSStefan Weinhuber else 50678e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50681da177e4SLinus Torvalds return rc; 50691da177e4SLinus Torvalds } 50701da177e4SLinus Torvalds 50711da177e4SLinus Torvalds /* 5072196339f1SStefan Weinhuber * SNID - Sense Path Group ID 5073196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 5074196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 5075196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 5076196339f1SStefan Weinhuber */ 5077196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 5078196339f1SStefan Weinhuber void __user *argp) 5079196339f1SStefan Weinhuber { 5080196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 5081196339f1SStefan Weinhuber int rc; 5082196339f1SStefan Weinhuber struct ccw1 *ccw; 5083196339f1SStefan Weinhuber int useglobal; 5084196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 5085196339f1SStefan Weinhuber 5086196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 5087196339f1SStefan Weinhuber return -EACCES; 5088196339f1SStefan Weinhuber 5089196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5090196339f1SStefan Weinhuber return -EFAULT; 5091196339f1SStefan Weinhuber 5092196339f1SStefan Weinhuber useglobal = 0; 5093196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5094c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 5095c5205f2fSSebastian Ott NULL); 5096196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 5097196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5098196339f1SStefan Weinhuber useglobal = 1; 5099196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5100196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5101196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5102196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5103196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5104196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5105196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 5106196339f1SStefan Weinhuber } 5107196339f1SStefan Weinhuber ccw = cqr->cpaddr; 5108196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 5109196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5110196339f1SStefan Weinhuber ccw->count = 12; 5111196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 5112196339f1SStefan Weinhuber cqr->startdev = device; 5113196339f1SStefan Weinhuber cqr->memdev = device; 5114196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5115196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 51165a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5117196339f1SStefan Weinhuber cqr->retries = 5; 5118196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 51191aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5120196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 5121196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 5122196339f1SStefan Weinhuber 5123196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 5124196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 5125196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5126196339f1SStefan Weinhuber rc = -EIO; 5127196339f1SStefan Weinhuber if (!rc) { 5128196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 5129196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5130196339f1SStefan Weinhuber rc = -EFAULT; 5131196339f1SStefan Weinhuber } 5132196339f1SStefan Weinhuber 5133196339f1SStefan Weinhuber if (useglobal) 5134196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5135196339f1SStefan Weinhuber else 5136196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 5137196339f1SStefan Weinhuber return rc; 5138196339f1SStefan Weinhuber } 5139196339f1SStefan Weinhuber 5140196339f1SStefan Weinhuber /* 51411da177e4SLinus Torvalds * Read performance statistics 51421da177e4SLinus Torvalds */ 51431da177e4SLinus Torvalds static int 51441107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 51451da177e4SLinus Torvalds { 51461da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 51471da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 51481da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 51491da177e4SLinus Torvalds struct ccw1 *ccw; 51501da177e4SLinus Torvalds int rc; 51511da177e4SLinus Torvalds 515268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 51531da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 51541da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 5155c5205f2fSSebastian Ott device, NULL); 51561da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5157fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 51581da177e4SLinus Torvalds "Could not allocate initialization request"); 51591da177e4SLinus Torvalds return PTR_ERR(cqr); 51601da177e4SLinus Torvalds } 51618e09f215SStefan Weinhuber cqr->startdev = device; 51628e09f215SStefan Weinhuber cqr->memdev = device; 51631da177e4SLinus Torvalds cqr->retries = 0; 5164eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 51651da177e4SLinus Torvalds cqr->expires = 10 * HZ; 51661da177e4SLinus Torvalds 51671da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 51681da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51691da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 51701da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 51715d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 51721da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 51731da177e4SLinus Torvalds 51741da177e4SLinus Torvalds ccw = cqr->cpaddr; 51751da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 51761da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 51771da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 51781da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 51791da177e4SLinus Torvalds 51801da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 51811da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 51821da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 51831da177e4SLinus Torvalds 51841da177e4SLinus Torvalds ccw++; 51851da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 51861da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 51871da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 51881da177e4SLinus Torvalds 51891aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 51901da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 51911da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 51921da177e4SLinus Torvalds if (rc == 0) { 51931da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51941da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 51951107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 51961107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 51971107ccfbSChristoph Hellwig rc = -EFAULT; 51981da177e4SLinus Torvalds } 51998e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 52001da177e4SLinus Torvalds return rc; 52011da177e4SLinus Torvalds } 52021da177e4SLinus Torvalds 52031da177e4SLinus Torvalds /* 52041da177e4SLinus Torvalds * Get attributes (cache operations) 52051da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 52061da177e4SLinus Torvalds */ 52071da177e4SLinus Torvalds static int 52081107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 52091da177e4SLinus Torvalds { 5210543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 52111107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 52121da177e4SLinus Torvalds int rc; 52131da177e4SLinus Torvalds 52141da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 52151da177e4SLinus Torvalds return -EACCES; 52161107ccfbSChristoph Hellwig if (!argp) 52171da177e4SLinus Torvalds return -EINVAL; 52181da177e4SLinus Torvalds 52191107ccfbSChristoph Hellwig rc = 0; 52201107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 52211107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 52221107ccfbSChristoph Hellwig rc = -EFAULT; 52231da177e4SLinus Torvalds 52241da177e4SLinus Torvalds return rc; 52251da177e4SLinus Torvalds } 52261da177e4SLinus Torvalds 52271da177e4SLinus Torvalds /* 52281da177e4SLinus Torvalds * Set attributes (cache operations) 52291da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 52301da177e4SLinus Torvalds */ 52311da177e4SLinus Torvalds static int 52321107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 52331da177e4SLinus Torvalds { 5234543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 52351da177e4SLinus Torvalds struct attrib_data_t attrib; 52361da177e4SLinus Torvalds 52371da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 52381da177e4SLinus Torvalds return -EACCES; 52391107ccfbSChristoph Hellwig if (!argp) 52401da177e4SLinus Torvalds return -EINVAL; 52411da177e4SLinus Torvalds 52421107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 52431da177e4SLinus Torvalds return -EFAULT; 52441da177e4SLinus Torvalds private->attrib = attrib; 52451da177e4SLinus Torvalds 5246fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5247fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 52481da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 52491da177e4SLinus Torvalds return 0; 52501da177e4SLinus Torvalds } 52511da177e4SLinus Torvalds 5252ab1d848fSNigel Hislop /* 5253ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5254ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5255ab1d848fSNigel Hislop */ 5256ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5257ab1d848fSNigel Hislop { 5258ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5259ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5260ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5261ab1d848fSNigel Hislop struct ccw1 *ccw; 526252898025SNigel Hislop char psf0, psf1; 5263ab1d848fSNigel Hislop int rc; 5264ab1d848fSNigel Hislop 526552898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 526652898025SNigel Hislop return -EACCES; 526752898025SNigel Hislop psf0 = psf1 = 0; 526852898025SNigel Hislop 5269ab1d848fSNigel Hislop /* Copy parms from caller */ 5270ab1d848fSNigel Hislop rc = -EFAULT; 5271ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5272ab1d848fSNigel Hislop goto out; 527392d62891SHeiko Carstens if (is_compat_task()) { 5274ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5275ab1d848fSNigel Hislop rc = -EINVAL; 5276f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5277ab1d848fSNigel Hislop goto out; 5278f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5279f8b06859SHeiko Carstens goto out; 5280f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5281f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5282ab1d848fSNigel Hislop } 52834a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 52844a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 52854a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 52864a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 52874a8ef699SStefan Haberland usrparm.psf_data_len); 52884a8ef699SStefan Haberland rc = -EINVAL; 52894a8ef699SStefan Haberland goto out; 52904a8ef699SStefan Haberland } 5291ab1d848fSNigel Hislop /* alloc I/O data area */ 5292ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5293ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5294ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5295ab1d848fSNigel Hislop rc = -ENOMEM; 5296ab1d848fSNigel Hislop goto out_free; 5297ab1d848fSNigel Hislop } 5298ab1d848fSNigel Hislop 5299ab1d848fSNigel Hislop /* get syscall header from user space */ 5300ab1d848fSNigel Hislop rc = -EFAULT; 5301ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5302ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5303ab1d848fSNigel Hislop usrparm.psf_data_len)) 5304ab1d848fSNigel Hislop goto out_free; 530552898025SNigel Hislop psf0 = psf_data[0]; 530652898025SNigel Hislop psf1 = psf_data[1]; 5307ab1d848fSNigel Hislop 5308ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5309c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5310ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5311fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5312ab1d848fSNigel Hislop "Could not allocate initialization request"); 5313ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5314ab1d848fSNigel Hislop goto out_free; 5315ab1d848fSNigel Hislop } 5316ab1d848fSNigel Hislop 5317ab1d848fSNigel Hislop cqr->startdev = device; 5318ab1d848fSNigel Hislop cqr->memdev = device; 5319ab1d848fSNigel Hislop cqr->retries = 3; 5320ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 53211aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5322ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5323ab1d848fSNigel Hislop 5324ab1d848fSNigel Hislop /* Build the ccws */ 5325ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5326ab1d848fSNigel Hislop 5327ab1d848fSNigel Hislop /* PSF ccw */ 5328ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5329ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5330ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5331ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 5332ab1d848fSNigel Hislop 5333ab1d848fSNigel Hislop ccw++; 5334ab1d848fSNigel Hislop 5335ab1d848fSNigel Hislop /* RSSD ccw */ 5336ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5337ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5338ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5339ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 5340ab1d848fSNigel Hislop 5341ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5342ab1d848fSNigel Hislop if (rc) 5343ab1d848fSNigel Hislop goto out_sfree; 5344ab1d848fSNigel Hislop 5345ab1d848fSNigel Hislop rc = -EFAULT; 5346ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5347ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5348ab1d848fSNigel Hislop goto out_sfree; 5349ab1d848fSNigel Hislop rc = 0; 5350ab1d848fSNigel Hislop 5351ab1d848fSNigel Hislop out_sfree: 5352ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5353ab1d848fSNigel Hislop out_free: 5354ab1d848fSNigel Hislop kfree(rssd_result); 5355ab1d848fSNigel Hislop kfree(psf_data); 5356ab1d848fSNigel Hislop out: 535752898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 535852898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 535952898025SNigel Hislop (int) psf0, (int) psf1, rc); 5360ab1d848fSNigel Hislop return rc; 5361ab1d848fSNigel Hislop } 5362ab1d848fSNigel Hislop 53631107ccfbSChristoph Hellwig static int 53648e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 53651107ccfbSChristoph Hellwig { 53668e09f215SStefan Weinhuber struct dasd_device *device = block->base; 53678e09f215SStefan Weinhuber 53681107ccfbSChristoph Hellwig switch (cmd) { 53691107ccfbSChristoph Hellwig case BIODASDGATTR: 53701107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 53711107ccfbSChristoph Hellwig case BIODASDSATTR: 53721107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 53731107ccfbSChristoph Hellwig case BIODASDPSRD: 53741107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 53751107ccfbSChristoph Hellwig case BIODASDRLSE: 53761107ccfbSChristoph Hellwig return dasd_eckd_release(device); 53771107ccfbSChristoph Hellwig case BIODASDRSRV: 53781107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 53791107ccfbSChristoph Hellwig case BIODASDSLCK: 53801107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5381196339f1SStefan Weinhuber case BIODASDSNID: 5382196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5383ab1d848fSNigel Hislop case BIODASDSYMMIO: 5384ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 53851107ccfbSChristoph Hellwig default: 53866b79d14eSHeiko Carstens return -ENOTTY; 53871107ccfbSChristoph Hellwig } 53881107ccfbSChristoph Hellwig } 53891107ccfbSChristoph Hellwig 53901da177e4SLinus Torvalds /* 5391445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5392445b5b49SHorst Hummel * and return number of printed chars. 5393445b5b49SHorst Hummel */ 53944d284cacSHeiko Carstens static int 5395445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5396445b5b49SHorst Hummel { 5397445b5b49SHorst Hummel int len, count; 5398445b5b49SHorst Hummel char *datap; 5399445b5b49SHorst Hummel 5400445b5b49SHorst Hummel len = 0; 5401445b5b49SHorst Hummel while (from <= to) { 5402773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5403445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5404445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5405445b5b49SHorst Hummel 5406445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5407445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5408445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 5409445b5b49SHorst Hummel else 5410445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 5411445b5b49SHorst Hummel 5412445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 5413445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 5414445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 5415445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 5416445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5417445b5b49SHorst Hummel } 5418445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5419445b5b49SHorst Hummel from++; 5420445b5b49SHorst Hummel } 5421445b5b49SHorst Hummel return len; 5422445b5b49SHorst Hummel } 5423445b5b49SHorst Hummel 5424fc19f381SStefan Haberland static void 5425aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5426aeec92caSStefan Haberland char *reason) 5427fc19f381SStefan Haberland { 5428fc19f381SStefan Haberland u64 *sense; 5429a5a0061fSStefan Weinhuber u64 *stat; 5430fc19f381SStefan Haberland 5431aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5432a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5433fc19f381SStefan Haberland if (sense) { 5434a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5435a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5436a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5437ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5438fc19f381SStefan Haberland } else { 5439a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5440a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5441a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5442fc19f381SStefan Haberland } 5443fc19f381SStefan Haberland } 5444fc19f381SStefan Haberland 5445445b5b49SHorst Hummel /* 54461da177e4SLinus Torvalds * Print sense data and related channel program. 54471da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 54481da177e4SLinus Torvalds */ 5449f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 54508e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 54511da177e4SLinus Torvalds { 54521da177e4SLinus Torvalds char *page; 5453445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5454445b5b49SHorst Hummel int len, sl, sct; 54551da177e4SLinus Torvalds 54561da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 54571da177e4SLinus Torvalds if (page == NULL) { 5458fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5459fc19f381SStefan Haberland "No memory to dump sense data\n"); 54601da177e4SLinus Torvalds return; 54611da177e4SLinus Torvalds } 5462445b5b49SHorst Hummel /* dump the sense data */ 5463773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 54641da177e4SLinus Torvalds " I/O status report for device %s:\n", 54652a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5466773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5467a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5468a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5469a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5470a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5471a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5472a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5473773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 54741da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 54752a0217d5SKay Sievers dev_name(&device->cdev->dev), 547623d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 54771da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 54781da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5479773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 54801da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 54811da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 54821da177e4SLinus Torvalds 54831da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 54841da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 54851da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 54861da177e4SLinus Torvalds } 54871da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 54881da177e4SLinus Torvalds } 54891da177e4SLinus Torvalds 54901da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 54911da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5492773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 54931da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 54941da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 54951da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 54961da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 54971da177e4SLinus Torvalds } else { 54981da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5499773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55001da177e4SLinus Torvalds " 32 Byte: Format: %x " 55011da177e4SLinus Torvalds "Exception class %x\n", 55021da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 55031da177e4SLinus Torvalds } 55041da177e4SLinus Torvalds } else { 5505773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55061da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 55071da177e4SLinus Torvalds } 5508773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55091da177e4SLinus Torvalds 55108e09f215SStefan Weinhuber if (req) { 55118e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5512445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5513445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5514445b5b49SHorst Hummel first = req->cpaddr; 5515445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5516445b5b49SHorst Hummel to = min(first + 6, last); 5517773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 55181da177e4SLinus Torvalds " Related CP in req: %p\n", req); 5519445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 5520773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55211da177e4SLinus Torvalds 5522445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5523445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 55241da177e4SLinus Torvalds len = 0; 5525445b5b49SHorst Hummel from = ++to; 552623d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 552723d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5528445b5b49SHorst Hummel if (from < fail - 2) { 5529445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5530773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 55311da177e4SLinus Torvalds } 5532445b5b49SHorst Hummel to = min(fail + 1, last); 5533445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 55341da177e4SLinus Torvalds 5535445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5536445b5b49SHorst Hummel from = max(from, ++to); 5537445b5b49SHorst Hummel if (from < last - 1) { 5538445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5539773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 55401da177e4SLinus Torvalds } 5541445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 55421da177e4SLinus Torvalds if (len > 0) 5543773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55448e09f215SStefan Weinhuber } 55451da177e4SLinus Torvalds free_page((unsigned long) page); 55461da177e4SLinus Torvalds } 55471da177e4SLinus Torvalds 5548f3eb5384SStefan Weinhuber 5549f3eb5384SStefan Weinhuber /* 5550f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5551f3eb5384SStefan Weinhuber */ 5552f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5553f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5554f3eb5384SStefan Weinhuber { 5555f3eb5384SStefan Weinhuber char *page; 5556f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5557f3eb5384SStefan Weinhuber struct tsb *tsb; 5558ef19298bSStefan Weinhuber u8 *sense, *rcq; 5559f3eb5384SStefan Weinhuber 5560f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5561f3eb5384SStefan Weinhuber if (page == NULL) { 5562fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5563f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5564f3eb5384SStefan Weinhuber return; 5565f3eb5384SStefan Weinhuber } 5566f3eb5384SStefan Weinhuber /* dump the sense data */ 5567773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5568f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5569f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5570773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5571a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5572a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5573a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5574a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5575a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5576a521b048SStefan Haberland irb->scsw.tm.fcxs, 5577a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5578a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5579773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5580f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5581f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5582f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5583f3eb5384SStefan Weinhuber 5584f3eb5384SStefan Weinhuber tsb = NULL; 5585f3eb5384SStefan Weinhuber sense = NULL; 5586a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5587f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5588f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5589f3eb5384SStefan Weinhuber 5590b8fde722SStefan Haberland if (tsb) { 5591773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5592f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5593773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5594f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5595773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5596f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5597773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5598f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5599f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5600773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5601f3eb5384SStefan Weinhuber " residual %d\n", residual); 5602f3eb5384SStefan Weinhuber 5603f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5604f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5605773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5606f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5607f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5608773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5609f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5610f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5611773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5612f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5613f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5614773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5615f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5616f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5617773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5618f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5619f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5620f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5621f3eb5384SStefan Weinhuber break; 5622f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5623773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5624f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5625ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5626773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5627ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5628ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5629ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5630f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5631f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5632ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5633f3eb5384SStefan Weinhuber } 5634f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5635f3eb5384SStefan Weinhuber } 5636f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5637f3eb5384SStefan Weinhuber break; 5638f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5639773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 56408693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5641f3eb5384SStefan Weinhuber break; 5642f3eb5384SStefan Weinhuber } 5643f3eb5384SStefan Weinhuber 5644f3eb5384SStefan Weinhuber if (sense) { 5645f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5646773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5647f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5648f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5649f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5650f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5651f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5652f3eb5384SStefan Weinhuber } 5653f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5654f3eb5384SStefan Weinhuber } 5655f3eb5384SStefan Weinhuber 5656f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5657f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5658773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5659f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5660f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5661f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5662f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5663f3eb5384SStefan Weinhuber } else { 5664f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5665773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5666f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5667f3eb5384SStefan Weinhuber "Exception class %x\n", 5668f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5669f3eb5384SStefan Weinhuber } 5670f3eb5384SStefan Weinhuber } else { 5671773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5672f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5673f3eb5384SStefan Weinhuber } 5674f3eb5384SStefan Weinhuber } else { 5675773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5676f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5677f3eb5384SStefan Weinhuber } 5678773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5679f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5680f3eb5384SStefan Weinhuber } 5681f3eb5384SStefan Weinhuber 5682f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5683f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5684f3eb5384SStefan Weinhuber { 56858fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 56868fd57520SJan Höppner 56878fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 56888fd57520SJan Höppner /* 56898fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 56908fd57520SJan Höppner * error might be expected and log messages shouldn't be written 56918fd57520SJan Höppner * then. Check if the according suppress bit is set. 56928fd57520SJan Höppner */ 56938fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 56948fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 56958fd57520SJan Höppner return; 56968fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 56978fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 56988fd57520SJan Höppner return; 56998fd57520SJan Höppner 5700f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 57018fd57520SJan Höppner } else { 57028fd57520SJan Höppner /* 5703ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5704ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5705ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 57068fd57520SJan Höppner */ 5707ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5708ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5709ab24fbd3SStefan Haberland return; 5710ab24fbd3SStefan Haberland 57118fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 57128fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 57138fd57520SJan Höppner return; 57148fd57520SJan Höppner 5715f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5716f3eb5384SStefan Weinhuber } 57178fd57520SJan Höppner } 5718f3eb5384SStefan Weinhuber 5719501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 5720d41dd122SStefan Haberland { 5721d41dd122SStefan Haberland /* 5722d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 5723d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 5724d41dd122SStefan Haberland * information like PAV support that might have changed 5725d41dd122SStefan Haberland */ 5726d41dd122SStefan Haberland dasd_alias_remove_device(device); 5727d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5728d41dd122SStefan Haberland 5729d41dd122SStefan Haberland return 0; 5730d41dd122SStefan Haberland } 5731d41dd122SStefan Haberland 5732501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 5733d41dd122SStefan Haberland { 5734543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 57356fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 5736f9f8d02fSStefan Haberland int rc; 5737d41dd122SStefan Haberland struct dasd_uid temp_uid; 5738a7602f6cSStefan Haberland unsigned long flags; 5739ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 5740d41dd122SStefan Haberland 5741d41dd122SStefan Haberland /* Read Configuration Data */ 5742251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5743251afd69SStefan Haberland if (rc) { 5744251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5745251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5746251afd69SStefan Haberland goto out_err; 5747251afd69SStefan Haberland } 5748d41dd122SStefan Haberland 57492dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 57502dedf0d9SStefan Haberland /* Generate device unique id */ 57512dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 57522dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5753d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 5754a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 5755a7602f6cSStefan Haberland "changed\n"); 57562dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5757d41dd122SStefan Haberland if (rc) 5758d41dd122SStefan Haberland goto out_err; 5759d41dd122SStefan Haberland 5760d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 5761f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 5762f9f8d02fSStefan Haberland if (rc) 5763251afd69SStefan Haberland goto out_err; 5764ea4da6eaSStefan Haberland 5765ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 5766ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 5767f4ac1d02SStefan Weinhuber 5768f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 5769251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5770251afd69SStefan Haberland if (rc) { 5771251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5772251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5773251afd69SStefan Haberland goto out_err2; 5774251afd69SStefan Haberland } 5775d41dd122SStefan Haberland 5776d41dd122SStefan Haberland /* Read Feature Codes */ 577768d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 5778d41dd122SStefan Haberland 5779c729696bSJan Höppner /* Read Volume Information */ 5780dd454839SJan Höppner dasd_eckd_read_vol_info(device); 5781c729696bSJan Höppner 5782c729696bSJan Höppner /* Read Extent Pool Information */ 5783dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 5784c729696bSJan Höppner 5785d41dd122SStefan Haberland /* Read Device Characteristics */ 578668b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 57876fca97a9SStefan Haberland &temp_rdc_data, 64); 5788d41dd122SStefan Haberland if (rc) { 5789b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5790b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 5791251afd69SStefan Haberland goto out_err2; 5792d41dd122SStefan Haberland } 5793a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 57946fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5795a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5796d41dd122SStefan Haberland 5797d41dd122SStefan Haberland /* add device to alias management */ 5798d41dd122SStefan Haberland dasd_alias_add_device(device); 5799d41dd122SStefan Haberland 5800d41dd122SStefan Haberland return 0; 5801d41dd122SStefan Haberland 5802251afd69SStefan Haberland out_err2: 5803251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5804d41dd122SStefan Haberland out_err: 5805e6125fbaSStefan Haberland return -1; 5806d41dd122SStefan Haberland } 5807d41dd122SStefan Haberland 5808501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5809501183f2SStefan Haberland { 5810543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5811501183f2SStefan Haberland int rc, old_base; 58122dedf0d9SStefan Haberland char print_uid[60]; 58132dedf0d9SStefan Haberland struct dasd_uid uid; 58142dedf0d9SStefan Haberland unsigned long flags; 5815501183f2SStefan Haberland 581659a9ed5fSStefan Haberland /* 581759a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 581859a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 581959a9ed5fSStefan Haberland */ 582059a9ed5fSStefan Haberland dasd_alias_remove_device(device); 582159a9ed5fSStefan Haberland 58222dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5823501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 58242dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 58252dedf0d9SStefan Haberland 5826501183f2SStefan Haberland /* Read Configuration Data */ 5827501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5828501183f2SStefan Haberland if (rc) 5829501183f2SStefan Haberland goto out_err; 5830501183f2SStefan Haberland 58312dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5832501183f2SStefan Haberland if (rc) 5833501183f2SStefan Haberland goto out_err; 5834501183f2SStefan Haberland /* 5835501183f2SStefan Haberland * update unit address configuration and 5836501183f2SStefan Haberland * add device to alias management 5837501183f2SStefan Haberland */ 5838501183f2SStefan Haberland dasd_alias_update_add_device(device); 5839501183f2SStefan Haberland 58402dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 58412dedf0d9SStefan Haberland 58422dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 58432dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 58442dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 58452dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 58462dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5847501183f2SStefan Haberland else 58482dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 58492dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 58502dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5851501183f2SStefan Haberland 5852501183f2SStefan Haberland dev_info(&device->cdev->dev, 5853501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 58542dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5855501183f2SStefan Haberland } 5856501183f2SStefan Haberland return 0; 5857501183f2SStefan Haberland 5858501183f2SStefan Haberland out_err: 5859501183f2SStefan Haberland return -1; 5860501183f2SStefan Haberland } 5861501183f2SStefan Haberland 58625db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 58635db8440cSStefan Haberland struct dasd_rssd_messages *messages, 58645db8440cSStefan Haberland __u8 lpum) 58655db8440cSStefan Haberland { 58665db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 58675db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 58685db8440cSStefan Haberland struct dasd_ccw_req *cqr; 58695db8440cSStefan Haberland struct ccw1 *ccw; 58705db8440cSStefan Haberland int rc; 58715db8440cSStefan Haberland 58725db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 58735db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 58745db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5875c5205f2fSSebastian Ott device, NULL); 58765db8440cSStefan Haberland if (IS_ERR(cqr)) { 58775db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58785db8440cSStefan Haberland "Could not allocate read message buffer request"); 58795db8440cSStefan Haberland return PTR_ERR(cqr); 58805db8440cSStefan Haberland } 58815db8440cSStefan Haberland 5882af775210SStefan Haberland cqr->lpm = lpum; 5883af775210SStefan Haberland retry: 58845db8440cSStefan Haberland cqr->startdev = device; 58855db8440cSStefan Haberland cqr->memdev = device; 58865db8440cSStefan Haberland cqr->block = NULL; 58875db8440cSStefan Haberland cqr->expires = 10 * HZ; 58885db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5889b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5890b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5891b179b037SStefan Haberland * do basic erp */ 5892b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5893b179b037SStefan Haberland cqr->retries = 256; 58945db8440cSStefan Haberland 58955db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 58965db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58975db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 58985db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 58995db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 59005db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 59015db8440cSStefan Haberland 59025db8440cSStefan Haberland ccw = cqr->cpaddr; 59035db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59045db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 59055db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 59065db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59075db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 59085db8440cSStefan Haberland 59095db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 59105db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 59115db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 59125db8440cSStefan Haberland 59135db8440cSStefan Haberland ccw++; 59145db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 59155db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 59165db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59175db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 59185db8440cSStefan Haberland 59195db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 59205db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 59215db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 59225db8440cSStefan Haberland if (rc == 0) { 59235db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59245db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 59255db8440cSStefan Haberland (prssdp + 1); 59265db8440cSStefan Haberland memcpy(messages, message_buf, 59275db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5928af775210SStefan Haberland } else if (cqr->lpm) { 5929af775210SStefan Haberland /* 5930af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5931af775210SStefan Haberland * but instead we get the required information on any path 5932af775210SStefan Haberland * so retry with open path mask 5933af775210SStefan Haberland */ 5934af775210SStefan Haberland cqr->lpm = 0; 5935af775210SStefan Haberland goto retry; 59365db8440cSStefan Haberland } else 59375db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 59385db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 59395db8440cSStefan Haberland , rc); 59405db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59415db8440cSStefan Haberland return rc; 59425db8440cSStefan Haberland } 59435db8440cSStefan Haberland 59445a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 59455a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 59465a3b7b11SStefan Haberland { 59475a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 59485a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 59495a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 59505a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 59515a3b7b11SStefan Haberland struct ccw1 *ccw; 59525a3b7b11SStefan Haberland int rc; 59535a3b7b11SStefan Haberland 59545a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 59555a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 59565a3b7b11SStefan Haberland return -EOPNOTSUPP; 59575a3b7b11SStefan Haberland 5958ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5959ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5960ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5961ccd53fa2SStefan Haberland 59625a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 59635a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5964c5205f2fSSebastian Ott device, NULL); 59655a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 59665a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59675a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 59685a3b7b11SStefan Haberland return PTR_ERR(cqr); 59695a3b7b11SStefan Haberland } 59705a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 59715a3b7b11SStefan Haberland if (!host_access) { 59725a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 59735a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59745a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 59755a3b7b11SStefan Haberland return -ENOMEM; 59765a3b7b11SStefan Haberland } 59775a3b7b11SStefan Haberland cqr->startdev = device; 59785a3b7b11SStefan Haberland cqr->memdev = device; 59795a3b7b11SStefan Haberland cqr->block = NULL; 59805a3b7b11SStefan Haberland cqr->retries = 256; 59815a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 59825a3b7b11SStefan Haberland 59835a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 59845a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59855a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 59865a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 59875a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 59885a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 59895a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 59905a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 59915a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 59925a3b7b11SStefan Haberland 59935a3b7b11SStefan Haberland ccw = cqr->cpaddr; 59945a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59955a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 59965a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 59975a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59985a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 59995a3b7b11SStefan Haberland 60005a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 60015a3b7b11SStefan Haberland ccw++; 60025a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 60035a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 60045a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 60055a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 60065a3b7b11SStefan Haberland 60075a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 60085a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 6009ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 6010ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 6011f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 60125a3b7b11SStefan Haberland if (rc == 0) { 60135a3b7b11SStefan Haberland *data = *host_access; 60145a3b7b11SStefan Haberland } else { 60155a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 60165a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 60175a3b7b11SStefan Haberland rc); 60185a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 60195a3b7b11SStefan Haberland } 60205a3b7b11SStefan Haberland 60215a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 60225a3b7b11SStefan Haberland kfree(host_access); 60235a3b7b11SStefan Haberland return rc; 60245a3b7b11SStefan Haberland } 60255a3b7b11SStefan Haberland /* 60265a3b7b11SStefan Haberland * return number of grouped devices 60275a3b7b11SStefan Haberland */ 60285a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 60295a3b7b11SStefan Haberland { 60305a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60315a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60325a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60335a3b7b11SStefan Haberland int count = 0; 60345a3b7b11SStefan Haberland int rc, i; 60355a3b7b11SStefan Haberland 60365a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60375a3b7b11SStefan Haberland if (!access) { 60385a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60395a3b7b11SStefan Haberland "Could not allocate access buffer"); 60405a3b7b11SStefan Haberland return -ENOMEM; 60415a3b7b11SStefan Haberland } 60425a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60435a3b7b11SStefan Haberland if (rc) { 60445a3b7b11SStefan Haberland kfree(access); 60455a3b7b11SStefan Haberland return rc; 60465a3b7b11SStefan Haberland } 60475a3b7b11SStefan Haberland 60485a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60495a3b7b11SStefan Haberland access->host_access_information; 60505a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 60515a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 60525a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 60535a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 60545a3b7b11SStefan Haberland count++; 60555a3b7b11SStefan Haberland } 60565a3b7b11SStefan Haberland 60575a3b7b11SStefan Haberland kfree(access); 60585a3b7b11SStefan Haberland return count; 60595a3b7b11SStefan Haberland } 60605a3b7b11SStefan Haberland 60615a3b7b11SStefan Haberland /* 60625a3b7b11SStefan Haberland * write host access information to a sequential file 60635a3b7b11SStefan Haberland */ 60645a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 60655a3b7b11SStefan Haberland { 60665a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60675a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60685a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60695a3b7b11SStefan Haberland char sysplex[9] = ""; 6070c7848e14SChristophe JAILLET int rc, i; 60715a3b7b11SStefan Haberland 60725a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60735a3b7b11SStefan Haberland if (!access) { 60745a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60755a3b7b11SStefan Haberland "Could not allocate access buffer"); 60765a3b7b11SStefan Haberland return -ENOMEM; 60775a3b7b11SStefan Haberland } 60785a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60795a3b7b11SStefan Haberland if (rc) { 60805a3b7b11SStefan Haberland kfree(access); 60815a3b7b11SStefan Haberland return rc; 60825a3b7b11SStefan Haberland } 60835a3b7b11SStefan Haberland 60845a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 60855a3b7b11SStefan Haberland access->host_access_information; 60865a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 60875a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 60885a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 60895a3b7b11SStefan Haberland /* PGID */ 6090c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 60915a3b7b11SStefan Haberland /* FLAGS */ 60925a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 60935a3b7b11SStefan Haberland /* SYSPLEX NAME */ 60945a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 60955a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 60965a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 60975a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 60985a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 60995a3b7b11SStefan Haberland /* TIMESTAMP */ 61005a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 61015a3b7b11SStefan Haberland entry->timestamp); 61025a3b7b11SStefan Haberland } 61035a3b7b11SStefan Haberland kfree(access); 61045a3b7b11SStefan Haberland 61055a3b7b11SStefan Haberland return 0; 61065a3b7b11SStefan Haberland } 61075a3b7b11SStefan Haberland 61085db8440cSStefan Haberland /* 61095db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 61105db8440cSStefan Haberland */ 61115db8440cSStefan Haberland static int 61125db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6113a521b048SStefan Haberland __u32 message_id, __u8 lpum) 61145db8440cSStefan Haberland { 61155db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 6116a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 61175db8440cSStefan Haberland struct dasd_ccw_req *cqr; 61185db8440cSStefan Haberland struct ccw1 *ccw; 61195db8440cSStefan Haberland int rc; 61205db8440cSStefan Haberland 61215db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 61225db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 6123c5205f2fSSebastian Ott device, NULL); 61245db8440cSStefan Haberland 61255db8440cSStefan Haberland if (IS_ERR(cqr)) { 61265db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 61275db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 61285db8440cSStefan Haberland return PTR_ERR(cqr); 61295db8440cSStefan Haberland } 61305db8440cSStefan Haberland 61315db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 61325db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 61335db8440cSStefan Haberland psf_cuir->cc = response; 6134a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 61355db8440cSStefan Haberland psf_cuir->message_id = message_id; 6136a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 6137a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 61385db8440cSStefan Haberland ccw = cqr->cpaddr; 61395db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 61405db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 6141b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 61425db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 61435db8440cSStefan Haberland 61445db8440cSStefan Haberland cqr->startdev = device; 61455db8440cSStefan Haberland cqr->memdev = device; 61465db8440cSStefan Haberland cqr->block = NULL; 61475db8440cSStefan Haberland cqr->retries = 256; 61485db8440cSStefan Haberland cqr->expires = 10*HZ; 61495db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 61505db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 6151b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 61525db8440cSStefan Haberland 61535db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 61545db8440cSStefan Haberland 61555db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 61565db8440cSStefan Haberland return rc; 61575db8440cSStefan Haberland } 61585db8440cSStefan Haberland 6159b179b037SStefan Haberland /* 6160b179b037SStefan Haberland * return configuration data that is referenced by record selector 6161b179b037SStefan Haberland * if a record selector is specified or per default return the 6162b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 6163b179b037SStefan Haberland */ 6164b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6165b179b037SStefan Haberland __u8 lpum, 6166b179b037SStefan Haberland struct dasd_cuir_message *cuir) 61675db8440cSStefan Haberland { 6168b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6169b179b037SStefan Haberland int path, pos; 61705db8440cSStefan Haberland 6171b179b037SStefan Haberland if (cuir->record_selector == 0) 6172b179b037SStefan Haberland goto out; 6173b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6174c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 6175b179b037SStefan Haberland if (conf_data->gneq.record_selector == 6176b179b037SStefan Haberland cuir->record_selector) 6177b179b037SStefan Haberland return conf_data; 61785db8440cSStefan Haberland } 6179b179b037SStefan Haberland out: 6180c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 61815db8440cSStefan Haberland } 61825db8440cSStefan Haberland 61835db8440cSStefan Haberland /* 6184b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6185b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6186b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6187b179b037SStefan Haberland * 6188b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6189b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6190b179b037SStefan Haberland * on. 6191b179b037SStefan Haberland */ 6192b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6193b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6194b179b037SStefan Haberland { 6195b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6196b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6197b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6198b179b037SStefan Haberland unsigned int pos, path; 6199b179b037SStefan Haberland char *ref_gneq, *gneq; 6200b179b037SStefan Haberland char *ref_ned, *ned; 6201b179b037SStefan Haberland int tbcpm = 0; 6202b179b037SStefan Haberland 6203b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6204b179b037SStefan Haberland the attention message was presented on */ 6205b179b037SStefan Haberland if (!cuir->ned_map || 6206b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6207b179b037SStefan Haberland return lpum; 6208b179b037SStefan Haberland 6209b179b037SStefan Haberland /* get reference conf data */ 6210b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6211b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6212b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6213b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6214b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6215b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6216b179b037SStefan Haberland mask = cuir->neq_map[2]; 6217b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6218b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6219b179b037SStefan Haberland 6220c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6221b179b037SStefan Haberland /* initialise data per path */ 6222b179b037SStefan Haberland bitmask = mask; 6223c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6224b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6225b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6226b179b037SStefan Haberland /* compare reference ned and per path ned */ 6227b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6228b179b037SStefan Haberland continue; 6229b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6230b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6231b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6232b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6233b179b037SStefan Haberland while (bitmask) { 6234b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6235b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6236b179b037SStefan Haberland != 0) 6237b179b037SStefan Haberland break; 6238b179b037SStefan Haberland clear_bit(pos, &bitmask); 6239b179b037SStefan Haberland } 6240b179b037SStefan Haberland if (bitmask) 6241b179b037SStefan Haberland continue; 6242b179b037SStefan Haberland /* device and path match the reference values 6243b179b037SStefan Haberland add path to CUIR scope */ 6244c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6245b179b037SStefan Haberland } 6246b179b037SStefan Haberland return tbcpm; 6247b179b037SStefan Haberland } 6248b179b037SStefan Haberland 6249b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6250a521b048SStefan Haberland unsigned long paths, int action) 6251b179b037SStefan Haberland { 6252b179b037SStefan Haberland int pos; 6253b179b037SStefan Haberland 6254b179b037SStefan Haberland while (paths) { 6255b179b037SStefan Haberland /* get position of bit in mask */ 6256a521b048SStefan Haberland pos = 8 - ffs(paths); 6257b179b037SStefan Haberland /* get channel path descriptor from this position */ 6258b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6259a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6260a521b048SStefan Haberland device->path[pos].cssid, 6261a521b048SStefan Haberland device->path[pos].chpid); 6262b179b037SStefan Haberland else if (action == CUIR_RESUME) 6263a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6264a521b048SStefan Haberland device->path[pos].cssid, 6265a521b048SStefan Haberland device->path[pos].chpid); 6266a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6267b179b037SStefan Haberland } 6268b179b037SStefan Haberland } 6269b179b037SStefan Haberland 6270b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6271b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6272b179b037SStefan Haberland { 6273b179b037SStefan Haberland unsigned long tbcpm; 6274b179b037SStefan Haberland 6275b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6276b179b037SStefan Haberland /* nothing to do if path is not in use */ 6277c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6278b179b037SStefan Haberland return 0; 6279c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6280b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6281b179b037SStefan Haberland return error */ 6282b179b037SStefan Haberland return -EINVAL; 6283b179b037SStefan Haberland } 6284b179b037SStefan Haberland /* remove device from operational path mask */ 6285c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6286c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6287b179b037SStefan Haberland return tbcpm; 6288b179b037SStefan Haberland } 6289b179b037SStefan Haberland 6290b179b037SStefan Haberland /* 6291b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6292b179b037SStefan Haberland * return an error if the last path to a device would be removed 62935db8440cSStefan Haberland * 62945db8440cSStefan Haberland * if only part of the devices are quiesced and an error 62955db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 62965db8440cSStefan Haberland * notify the already set offline devices again 62975db8440cSStefan Haberland */ 62985db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6299b179b037SStefan Haberland struct dasd_cuir_message *cuir) 63005db8440cSStefan Haberland { 6301543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 63025db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 63035db8440cSStefan Haberland struct dasd_device *dev, *n; 6304b179b037SStefan Haberland unsigned long paths = 0; 6305b179b037SStefan Haberland unsigned long flags; 6306b179b037SStefan Haberland int tbcpm; 63075db8440cSStefan Haberland 63085db8440cSStefan Haberland /* active devices */ 6309b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 63105db8440cSStefan Haberland alias_list) { 6311b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6312b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6313b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6314b179b037SStefan Haberland if (tbcpm < 0) 6315b179b037SStefan Haberland goto out_err; 6316b179b037SStefan Haberland paths |= tbcpm; 63175db8440cSStefan Haberland } 63185db8440cSStefan Haberland /* inactive devices */ 6319b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 63205db8440cSStefan Haberland alias_list) { 6321b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6322b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6323b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6324b179b037SStefan Haberland if (tbcpm < 0) 6325b179b037SStefan Haberland goto out_err; 6326b179b037SStefan Haberland paths |= tbcpm; 63275db8440cSStefan Haberland } 63285db8440cSStefan Haberland /* devices in PAV groups */ 63295db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 63305db8440cSStefan Haberland &private->lcu->grouplist, group) { 63315db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 63325db8440cSStefan Haberland alias_list) { 6333b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6334b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6335b179b037SStefan Haberland spin_unlock_irqrestore( 6336b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6337b179b037SStefan Haberland if (tbcpm < 0) 6338b179b037SStefan Haberland goto out_err; 6339b179b037SStefan Haberland paths |= tbcpm; 63405db8440cSStefan Haberland } 63415db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 63425db8440cSStefan Haberland alias_list) { 6343b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6344b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6345b179b037SStefan Haberland spin_unlock_irqrestore( 6346b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6347b179b037SStefan Haberland if (tbcpm < 0) 6348b179b037SStefan Haberland goto out_err; 6349b179b037SStefan Haberland paths |= tbcpm; 63505db8440cSStefan Haberland } 63515db8440cSStefan Haberland } 6352b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6353a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6354b179b037SStefan Haberland return 0; 6355b179b037SStefan Haberland out_err: 6356b179b037SStefan Haberland return tbcpm; 63575db8440cSStefan Haberland } 63585db8440cSStefan Haberland 63595db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6360b179b037SStefan Haberland struct dasd_cuir_message *cuir) 63615db8440cSStefan Haberland { 6362543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 63635db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 63645db8440cSStefan Haberland struct dasd_device *dev, *n; 6365b179b037SStefan Haberland unsigned long paths = 0; 6366b179b037SStefan Haberland int tbcpm; 63675db8440cSStefan Haberland 63685db8440cSStefan Haberland /* 63695db8440cSStefan Haberland * the path may have been added through a generic path event before 63705db8440cSStefan Haberland * only trigger path verification if the path is not already in use 63715db8440cSStefan Haberland */ 63725db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63735db8440cSStefan Haberland &private->lcu->active_devices, 63745db8440cSStefan Haberland alias_list) { 6375b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6376b179b037SStefan Haberland paths |= tbcpm; 6377c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6378c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63795db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63805db8440cSStefan Haberland } 63815db8440cSStefan Haberland } 63825db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63835db8440cSStefan Haberland &private->lcu->inactive_devices, 63845db8440cSStefan Haberland alias_list) { 6385b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6386b179b037SStefan Haberland paths |= tbcpm; 6387c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6388c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 63895db8440cSStefan Haberland dasd_schedule_device_bh(dev); 63905db8440cSStefan Haberland } 63915db8440cSStefan Haberland } 63925db8440cSStefan Haberland /* devices in PAV groups */ 63935db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 63945db8440cSStefan Haberland &private->lcu->grouplist, 63955db8440cSStefan Haberland group) { 63965db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 63975db8440cSStefan Haberland &pavgroup->baselist, 63985db8440cSStefan Haberland alias_list) { 6399b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6400b179b037SStefan Haberland paths |= tbcpm; 6401c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6402c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 64035db8440cSStefan Haberland dasd_schedule_device_bh(dev); 64045db8440cSStefan Haberland } 64055db8440cSStefan Haberland } 64065db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 64075db8440cSStefan Haberland &pavgroup->aliaslist, 64085db8440cSStefan Haberland alias_list) { 6409b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6410b179b037SStefan Haberland paths |= tbcpm; 6411c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6412c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 64135db8440cSStefan Haberland dasd_schedule_device_bh(dev); 64145db8440cSStefan Haberland } 64155db8440cSStefan Haberland } 64165db8440cSStefan Haberland } 6417b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6418a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6419b179b037SStefan Haberland return 0; 64205db8440cSStefan Haberland } 64215db8440cSStefan Haberland 64225db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 64235db8440cSStefan Haberland __u8 lpum) 64245db8440cSStefan Haberland { 64255db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6426a521b048SStefan Haberland int response; 64275db8440cSStefan Haberland 6428b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6429b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6430b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6431b179b037SStefan Haberland ((u32 *)cuir)[3]); 64325db8440cSStefan Haberland 64335db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 64345db8440cSStefan Haberland /* quiesce */ 6435a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6436b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6437b179b037SStefan Haberland else 6438b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 64395db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 64405db8440cSStefan Haberland /* resume */ 6441a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6442b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 64435db8440cSStefan Haberland } else 64445db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 64455db8440cSStefan Haberland 6446b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6447a521b048SStefan Haberland cuir->message_id, lpum); 6448b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6449b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6450b179b037SStefan Haberland cuir->message_id); 6451b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6452b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 64535db8440cSStefan Haberland } 64545db8440cSStefan Haberland 64559e12e54cSJan Höppner static void dasd_eckd_oos_resume(struct dasd_device *device) 64569e12e54cSJan Höppner { 64579e12e54cSJan Höppner struct dasd_eckd_private *private = device->private; 64589e12e54cSJan Höppner struct alias_pav_group *pavgroup, *tempgroup; 64599e12e54cSJan Höppner struct dasd_device *dev, *n; 64609e12e54cSJan Höppner unsigned long flags; 64619e12e54cSJan Höppner 64629e12e54cSJan Höppner spin_lock_irqsave(&private->lcu->lock, flags); 64639e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 64649e12e54cSJan Höppner alias_list) { 64659e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64669e12e54cSJan Höppner dasd_generic_space_avail(dev); 64679e12e54cSJan Höppner } 64689e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 64699e12e54cSJan Höppner alias_list) { 64709e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64719e12e54cSJan Höppner dasd_generic_space_avail(dev); 64729e12e54cSJan Höppner } 64739e12e54cSJan Höppner /* devices in PAV groups */ 64749e12e54cSJan Höppner list_for_each_entry_safe(pavgroup, tempgroup, 64759e12e54cSJan Höppner &private->lcu->grouplist, 64769e12e54cSJan Höppner group) { 64779e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->baselist, 64789e12e54cSJan Höppner alias_list) { 64799e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64809e12e54cSJan Höppner dasd_generic_space_avail(dev); 64819e12e54cSJan Höppner } 64829e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 64839e12e54cSJan Höppner alias_list) { 64849e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 64859e12e54cSJan Höppner dasd_generic_space_avail(dev); 64869e12e54cSJan Höppner } 64879e12e54cSJan Höppner } 64889e12e54cSJan Höppner spin_unlock_irqrestore(&private->lcu->lock, flags); 64899e12e54cSJan Höppner } 64909e12e54cSJan Höppner 64919e12e54cSJan Höppner static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 64929e12e54cSJan Höppner __u8 lpum) 64939e12e54cSJan Höppner { 64949e12e54cSJan Höppner struct dasd_oos_message *oos = messages; 64959e12e54cSJan Höppner 64969e12e54cSJan Höppner switch (oos->code) { 64979e12e54cSJan Höppner case REPO_WARN: 64989e12e54cSJan Höppner case POOL_WARN: 64999e12e54cSJan Höppner dev_warn(&device->cdev->dev, 65009e12e54cSJan Höppner "Extent pool usage has reached a critical value\n"); 65019e12e54cSJan Höppner dasd_eckd_oos_resume(device); 65029e12e54cSJan Höppner break; 65039e12e54cSJan Höppner case REPO_EXHAUST: 65049e12e54cSJan Höppner case POOL_EXHAUST: 65059e12e54cSJan Höppner dev_warn(&device->cdev->dev, 65069e12e54cSJan Höppner "Extent pool is exhausted\n"); 65079e12e54cSJan Höppner break; 65089e12e54cSJan Höppner case REPO_RELIEVE: 65099e12e54cSJan Höppner case POOL_RELIEVE: 65109e12e54cSJan Höppner dev_info(&device->cdev->dev, 65119e12e54cSJan Höppner "Extent pool physical space constraint has been relieved\n"); 65129e12e54cSJan Höppner break; 65139e12e54cSJan Höppner } 65149e12e54cSJan Höppner 65159e12e54cSJan Höppner /* In any case, update related data */ 65169e12e54cSJan Höppner dasd_eckd_read_ext_pool_info(device); 65179e12e54cSJan Höppner 65189e12e54cSJan Höppner /* to make sure there is no attention left schedule work again */ 65199e12e54cSJan Höppner device->discipline->check_attention(device, lpum); 65209e12e54cSJan Höppner } 65219e12e54cSJan Höppner 65225db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 65235db8440cSStefan Haberland { 65245db8440cSStefan Haberland struct check_attention_work_data *data; 65255db8440cSStefan Haberland struct dasd_rssd_messages *messages; 65265db8440cSStefan Haberland struct dasd_device *device; 65275db8440cSStefan Haberland int rc; 65285db8440cSStefan Haberland 65295db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 65305db8440cSStefan Haberland device = data->device; 65315db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 65325db8440cSStefan Haberland if (!messages) { 65335db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 65345db8440cSStefan Haberland "Could not allocate attention message buffer"); 65355db8440cSStefan Haberland goto out; 65365db8440cSStefan Haberland } 65375db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 65385db8440cSStefan Haberland if (rc) 65395db8440cSStefan Haberland goto out; 65409e12e54cSJan Höppner 65415db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 65425db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 65435db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 65449e12e54cSJan Höppner if (messages->length == ATTENTION_LENGTH_OOS && 65459e12e54cSJan Höppner messages->format == ATTENTION_FORMAT_OOS) 65469e12e54cSJan Höppner dasd_eckd_handle_oos(device, messages, data->lpum); 65479e12e54cSJan Höppner 65485db8440cSStefan Haberland out: 65495db8440cSStefan Haberland dasd_put_device(device); 65505db8440cSStefan Haberland kfree(messages); 65515db8440cSStefan Haberland kfree(data); 65525db8440cSStefan Haberland } 65535db8440cSStefan Haberland 65545db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 65555db8440cSStefan Haberland { 65565db8440cSStefan Haberland struct check_attention_work_data *data; 65575db8440cSStefan Haberland 65585db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 65595db8440cSStefan Haberland if (!data) 65605db8440cSStefan Haberland return -ENOMEM; 65615db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 65625db8440cSStefan Haberland dasd_get_device(device); 65635db8440cSStefan Haberland data->device = device; 65645db8440cSStefan Haberland data->lpum = lpum; 65655db8440cSStefan Haberland schedule_work(&data->worker); 65665db8440cSStefan Haberland return 0; 65675db8440cSStefan Haberland } 65685db8440cSStefan Haberland 6569a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6570a521b048SStefan Haberland { 6571a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6572a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6573a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6574a521b048SStefan Haberland dev_err(&device->cdev->dev, 6575a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6576a521b048SStefan Haberland lpum); 6577a521b048SStefan Haberland return 1; 6578a521b048SStefan Haberland } 6579a521b048SStefan Haberland return 0; 6580a521b048SStefan Haberland } 6581a521b048SStefan Haberland 6582a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6583a521b048SStefan Haberland { 6584a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6585a521b048SStefan Haberland 6586a521b048SStefan Haberland dev_err(&device->cdev->dev, 6587a521b048SStefan Haberland "High Performance FICON disabled\n"); 6588a521b048SStefan Haberland private->fcx_max_data = 0; 6589a521b048SStefan Haberland } 6590a521b048SStefan Haberland 6591a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6592a521b048SStefan Haberland { 6593a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6594a521b048SStefan Haberland 6595a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6596a521b048SStefan Haberland } 6597a521b048SStefan Haberland 6598a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6599a521b048SStefan Haberland struct irb *irb) 6600a521b048SStefan Haberland { 6601a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6602a521b048SStefan Haberland 6603a521b048SStefan Haberland if (!private->fcx_max_data) { 6604a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6605a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6606a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6607a521b048SStefan Haberland return; 6608a521b048SStefan Haberland } 6609a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6610a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6611a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6612a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6613a521b048SStefan Haberland return; 6614a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6615a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6616a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6617a521b048SStefan Haberland } 6618a521b048SStefan Haberland /* 6619a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6620a521b048SStefan Haberland * requeue of existing requests 6621a521b048SStefan Haberland */ 6622a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6623a521b048SStefan Haberland dasd_schedule_requeue(device); 6624a521b048SStefan Haberland } 6625a521b048SStefan Haberland 6626a0610a8aSJan Höppner /* 6627a0610a8aSJan Höppner * Initialize block layer request queue. 6628a0610a8aSJan Höppner */ 6629a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6630a0610a8aSJan Höppner { 6631a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6632a0610a8aSJan Höppner struct request_queue *q = block->request_queue; 6633a0610a8aSJan Höppner struct dasd_device *device = block->base; 6634a0610a8aSJan Höppner int max; 6635a0610a8aSJan Höppner 6636a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6637a0610a8aSJan Höppner /* 6638a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6639a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6640a0610a8aSJan Höppner * only need one ccw per track 6641a0610a8aSJan Höppner * so the max_hw_sectors are 6642a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6643a0610a8aSJan Höppner */ 6644a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6645a0610a8aSJan Höppner } else { 6646a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6647a0610a8aSJan Höppner } 6648a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6649a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6650a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6651a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6652a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6653a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6654a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6655a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6656a0610a8aSJan Höppner } 6657a0610a8aSJan Höppner 6658d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 66593bda058bSSebastian Ott .driver = { 6660d41dd122SStefan Haberland .name = "dasd-eckd", 6661d41dd122SStefan Haberland .owner = THIS_MODULE, 66623bda058bSSebastian Ott }, 6663d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6664d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6665d41dd122SStefan Haberland .remove = dasd_generic_remove, 6666d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6667d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6668d41dd122SStefan Haberland .notify = dasd_generic_notify, 6669a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 66704679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6671d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 6672d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 6673d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 6674a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6675420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6676d41dd122SStefan Haberland }; 6677f3eb5384SStefan Weinhuber 66781da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 66791da177e4SLinus Torvalds .owner = THIS_MODULE, 66801da177e4SLinus Torvalds .name = "ECKD", 66811da177e4SLinus Torvalds .ebcname = "ECKD", 66821da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 66838e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 66841da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6685a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 6686d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 66878e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6688daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6689a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 66901da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 66911da177e4SLinus Torvalds .start_IO = dasd_start_IO, 66921da177e4SLinus Torvalds .term_IO = dasd_term_IO, 66938e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 66941da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 66958fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 66961da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 66971da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 66985a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 66998e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 67008e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 67011da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6702fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 67031da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 67041107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6705d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 6706d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 6707501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 67082dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6709f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 67105db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 67115a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 67125a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6713a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6714a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6715a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6716a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6717c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6718c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6719c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6720c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 672191dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6722c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6723c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6724c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6725c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6726c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 67279e12e54cSJan Höppner .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 67285e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 67295e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 67301da177e4SLinus Torvalds }; 67311da177e4SLinus Torvalds 67321da177e4SLinus Torvalds static int __init 67331da177e4SLinus Torvalds dasd_eckd_init(void) 67341da177e4SLinus Torvalds { 6735736e6ea0SSebastian Ott int ret; 6736736e6ea0SSebastian Ott 67371da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6738f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6739f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6740f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6741f932bceaSStefan Weinhuber return -ENOMEM; 67429e12e54cSJan Höppner dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 67439e12e54cSJan Höppner GFP_KERNEL | GFP_DMA); 67449e12e54cSJan Höppner if (!dasd_vol_info_req) 67459e12e54cSJan Höppner return -ENOMEM; 6746a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 6747a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6748a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 6749a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 67509e12e54cSJan Höppner kfree(dasd_vol_info_req); 6751a4d26c6aSStefan Weinhuber return -ENOMEM; 6752a4d26c6aSStefan Weinhuber } 6753558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6754558b9ef0SStefan Weinhuber if (!rawpadpage) { 6755558b9ef0SStefan Weinhuber kfree(path_verification_worker); 6756558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 67579e12e54cSJan Höppner kfree(dasd_vol_info_req); 6758558b9ef0SStefan Weinhuber return -ENOMEM; 6759558b9ef0SStefan Weinhuber } 6760736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6761736e6ea0SSebastian Ott if (!ret) 6762736e6ea0SSebastian Ott wait_for_device_probe(); 6763a4d26c6aSStefan Weinhuber else { 6764a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6765f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 67669e12e54cSJan Höppner kfree(dasd_vol_info_req); 6767558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6768a4d26c6aSStefan Weinhuber } 6769736e6ea0SSebastian Ott return ret; 67701da177e4SLinus Torvalds } 67711da177e4SLinus Torvalds 67721da177e4SLinus Torvalds static void __exit 67731da177e4SLinus Torvalds dasd_eckd_cleanup(void) 67741da177e4SLinus Torvalds { 67751da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6776a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6777f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6778558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 67791da177e4SLinus Torvalds } 67801da177e4SLinus Torvalds 67811da177e4SLinus Torvalds module_init(dasd_eckd_init); 67821da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6783