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 */ 106*b7294932SJan Höppner struct pe_handler_work_data { 107a4d26c6aSStefan Weinhuber struct work_struct worker; 108a4d26c6aSStefan Weinhuber struct dasd_device *device; 109a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 110a4d26c6aSStefan Weinhuber struct ccw1 ccw; 111a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112a4d26c6aSStefan Weinhuber int isglobal; 113a4d26c6aSStefan Weinhuber __u8 tbvpm; 114a4d26c6aSStefan Weinhuber }; 115*b7294932SJan Höppner static struct pe_handler_work_data *pe_handler_worker; 116*b7294932SJan Höppner static DEFINE_MUTEX(dasd_pe_handler_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 } 146e03c5941SJan 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 1003d2a52758SJan Höppner static void dasd_eckd_store_conf_data(struct dasd_device *device, 1004d2a52758SJan Höppner struct dasd_conf_data *conf_data, int chp) 1005d2a52758SJan Höppner { 1006d2a52758SJan Höppner struct channel_path_desc_fmt0 *chp_desc; 1007d2a52758SJan Höppner struct subchannel_id sch_id; 1008d2a52758SJan Höppner 1009d2a52758SJan Höppner ccw_device_get_schid(device->cdev, &sch_id); 101046018121SJan Höppner /* 101146018121SJan Höppner * path handling and read_conf allocate data 101246018121SJan Höppner * free it before replacing the pointer 101346018121SJan Höppner */ 101446018121SJan Höppner kfree(device->path[chp].conf_data); 1015d2a52758SJan Höppner device->path[chp].conf_data = conf_data; 1016d2a52758SJan Höppner device->path[chp].cssid = sch_id.cssid; 1017d2a52758SJan Höppner device->path[chp].ssid = sch_id.ssid; 1018d2a52758SJan Höppner chp_desc = ccw_device_get_chp_desc(device->cdev, chp); 1019d2a52758SJan Höppner if (chp_desc) 1020d2a52758SJan Höppner device->path[chp].chpid = chp_desc->chpid; 1021d2a52758SJan Höppner kfree(chp_desc); 1022d2a52758SJan Höppner } 1023d2a52758SJan Höppner 1024c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1025c7c0c9deSStefan Haberland { 1026543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1027c7c0c9deSStefan Haberland int i; 1028c7c0c9deSStefan Haberland 1029c7c0c9deSStefan Haberland private->conf_data = NULL; 1030c7c0c9deSStefan Haberland private->conf_len = 0; 1031c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1032c9346151SStefan Haberland kfree(device->path[i].conf_data); 1033c9346151SStefan Haberland device->path[i].conf_data = NULL; 1034a521b048SStefan Haberland device->path[i].cssid = 0; 1035a521b048SStefan Haberland device->path[i].ssid = 0; 1036a521b048SStefan Haberland device->path[i].chpid = 0; 10379e34c8baSJan Höppner dasd_path_notoper(device, i); 103819508b20SJan Höppner dasd_path_remove_kobj(device, i); 103919508b20SJan Höppner } 104019508b20SJan Höppner } 104119508b20SJan Höppner 104219508b20SJan Höppner static void dasd_eckd_read_fc_security(struct dasd_device *device) 104319508b20SJan Höppner { 104419508b20SJan Höppner struct dasd_eckd_private *private = device->private; 104519508b20SJan Höppner u8 esm_valid; 104619508b20SJan Höppner u8 esm[8]; 104719508b20SJan Höppner int chp; 104819508b20SJan Höppner int rc; 104919508b20SJan Höppner 105019508b20SJan Höppner rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); 105119508b20SJan Höppner if (rc) { 105219508b20SJan Höppner for (chp = 0; chp < 8; chp++) 105319508b20SJan Höppner device->path[chp].fc_security = 0; 105419508b20SJan Höppner return; 105519508b20SJan Höppner } 105619508b20SJan Höppner 105719508b20SJan Höppner for (chp = 0; chp < 8; chp++) { 105819508b20SJan Höppner if (esm_valid & (0x80 >> chp)) 105919508b20SJan Höppner device->path[chp].fc_security = esm[chp]; 106019508b20SJan Höppner else 106119508b20SJan Höppner device->path[chp].fc_security = 0; 1062c7c0c9deSStefan Haberland } 1063c7c0c9deSStefan Haberland } 1064c7c0c9deSStefan Haberland 10654abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10661da177e4SLinus Torvalds { 10671da177e4SLinus Torvalds void *conf_data; 10681da177e4SLinus Torvalds int conf_len, conf_data_saved; 1069b179b037SStefan Haberland int rc, path_err, pos; 1070a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1071b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1072b206181dSStefan Haberland struct dasd_uid *uid; 1073b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10741da177e4SLinus Torvalds 1075543691a4SSebastian Ott private = device->private; 1076a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10771da177e4SLinus Torvalds conf_data_saved = 0; 107855d3a85cSStefan Haberland path_err = 0; 10791da177e4SLinus Torvalds /* get configuration data per operational path */ 10801da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1081b206181dSStefan Haberland if (!(lpm & opm)) 1082b206181dSStefan Haberland continue; 108317283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10841da177e4SLinus Torvalds &conf_len, lpm); 10851da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1086b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10871da177e4SLinus Torvalds "Read configuration data returned " 1088b8ed5dd5SStefan Haberland "error %d", rc); 10891da177e4SLinus Torvalds return rc; 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds if (conf_data == NULL) { 1092b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1093b8ed5dd5SStefan Haberland "No configuration data " 1094b8ed5dd5SStefan Haberland "retrieved"); 1095a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1096c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1097d133a960SGabriel Craciunescu continue; /* no error */ 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds /* save first valid configuration data */ 11001da177e4SLinus Torvalds if (!conf_data_saved) { 1101c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1102c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 11034abb08c2SStefan Weinhuber private->conf_data = conf_data; 11044abb08c2SStefan Weinhuber private->conf_len = conf_len; 11054abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 11064abb08c2SStefan Weinhuber private->conf_data = NULL; 11074abb08c2SStefan Weinhuber private->conf_len = 0; 11084abb08c2SStefan Weinhuber kfree(conf_data); 11094abb08c2SStefan Weinhuber continue; 11104abb08c2SStefan Weinhuber } 1111b206181dSStefan Haberland /* 1112b206181dSStefan Haberland * build device UID that other path data 1113b206181dSStefan Haberland * can be compared to it 1114b206181dSStefan Haberland */ 1115b206181dSStefan Haberland dasd_eckd_generate_uid(device); 11161da177e4SLinus Torvalds conf_data_saved++; 1117b206181dSStefan Haberland } else { 1118b206181dSStefan Haberland path_private.conf_data = conf_data; 1119b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1120b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1121b206181dSStefan Haberland &path_private)) { 1122b206181dSStefan Haberland path_private.conf_data = NULL; 1123b206181dSStefan Haberland path_private.conf_len = 0; 1124b206181dSStefan Haberland kfree(conf_data); 1125b206181dSStefan Haberland continue; 1126b206181dSStefan Haberland } 1127b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1128b206181dSStefan Haberland device, &path_private)) { 1129b206181dSStefan Haberland uid = &path_private.uid; 1130b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1131b206181dSStefan Haberland snprintf(print_path_uid, 1132b206181dSStefan Haberland sizeof(print_path_uid), 1133b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1134b206181dSStefan Haberland uid->vendor, uid->serial, 1135b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1136b206181dSStefan Haberland uid->vduit); 1137b206181dSStefan Haberland else 1138b206181dSStefan Haberland snprintf(print_path_uid, 1139b206181dSStefan Haberland sizeof(print_path_uid), 1140b206181dSStefan Haberland "%s.%s.%04x.%02x", 1141b206181dSStefan Haberland uid->vendor, uid->serial, 1142b206181dSStefan Haberland uid->ssid, 1143b206181dSStefan Haberland uid->real_unit_addr); 1144b206181dSStefan Haberland uid = &private->uid; 1145b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1146b206181dSStefan Haberland snprintf(print_device_uid, 1147b206181dSStefan Haberland sizeof(print_device_uid), 1148b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1149b206181dSStefan Haberland uid->vendor, uid->serial, 1150b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1151b206181dSStefan Haberland uid->vduit); 1152b206181dSStefan Haberland else 1153b206181dSStefan Haberland snprintf(print_device_uid, 1154b206181dSStefan Haberland sizeof(print_device_uid), 1155b206181dSStefan Haberland "%s.%s.%04x.%02x", 1156b206181dSStefan Haberland uid->vendor, uid->serial, 1157b206181dSStefan Haberland uid->ssid, 1158b206181dSStefan Haberland uid->real_unit_addr); 1159b206181dSStefan Haberland dev_err(&device->cdev->dev, 1160b206181dSStefan Haberland "Not all channel paths lead to " 1161b206181dSStefan Haberland "the same device, path %02X leads to " 1162b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1163b206181dSStefan Haberland print_path_uid, print_device_uid); 116455d3a85cSStefan Haberland path_err = -EINVAL; 1165c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 116655d3a85cSStefan Haberland continue; 1167b206181dSStefan Haberland } 1168b206181dSStefan Haberland path_private.conf_data = NULL; 1169b206181dSStefan Haberland path_private.conf_len = 0; 11701da177e4SLinus Torvalds } 1171d2a52758SJan Höppner 1172d2a52758SJan Höppner pos = pathmask_to_pos(lpm); 1173d2a52758SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 1174d2a52758SJan Höppner 11754abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11761da177e4SLinus Torvalds case 0x02: 1177c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11781da177e4SLinus Torvalds break; 11791da177e4SLinus Torvalds case 0x03: 1180c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11811da177e4SLinus Torvalds break; 11821da177e4SLinus Torvalds } 1183c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1184c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1185ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1186ccc0e7dcSStefan Haberland } else { 1187c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1188ccc0e7dcSStefan Haberland } 11891da177e4SLinus Torvalds } 1190b206181dSStefan Haberland 119119508b20SJan Höppner dasd_eckd_read_fc_security(device); 119219508b20SJan Höppner 119355d3a85cSStefan Haberland return path_err; 11941da177e4SLinus Torvalds } 11951da177e4SLinus Torvalds 1196a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1197a521b048SStefan Haberland { 1198a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1199a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1200dd4b3c83SJan Höppner unsigned int mdc; 1201dd4b3c83SJan Höppner int tpm; 1202a521b048SStefan Haberland 1203a521b048SStefan Haberland if (dasd_nofcx) 1204a521b048SStefan Haberland return 0; 1205a521b048SStefan Haberland /* is transport mode supported? */ 1206a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1207a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1208a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1209a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1210a521b048SStefan Haberland 1211a521b048SStefan Haberland if (!tpm) 1212a521b048SStefan Haberland return 0; 1213a521b048SStefan Haberland 1214a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1215dd4b3c83SJan Höppner if (mdc == 0) { 1216a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1217a521b048SStefan Haberland return 0; 1218a521b048SStefan Haberland } else { 1219a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1220a521b048SStefan Haberland } 1221a521b048SStefan Haberland } 1222a521b048SStefan Haberland 1223a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1224a4d26c6aSStefan Weinhuber { 1225543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1226dd4b3c83SJan Höppner unsigned int mdc; 1227a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1228a4d26c6aSStefan Weinhuber 1229a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1230a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1231dd4b3c83SJan Höppner if (mdc == 0) { 1232a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1233a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1234a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1235a4d26c6aSStefan Weinhuber mdc, lpm); 1236a4d26c6aSStefan Weinhuber return mdc; 1237a4d26c6aSStefan Weinhuber } 12380f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1239a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1240a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1241a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1242a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1243a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1244a4d26c6aSStefan Weinhuber private->fcx_max_data); 1245a4d26c6aSStefan Weinhuber return -EACCES; 1246a4d26c6aSStefan Weinhuber } 1247a4d26c6aSStefan Weinhuber } 1248a4d26c6aSStefan Weinhuber return 0; 1249a4d26c6aSStefan Weinhuber } 1250a4d26c6aSStefan Weinhuber 1251b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1252*b7294932SJan Höppner struct pe_handler_work_data *data) 1253b206181dSStefan Haberland { 1254543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1255c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1256543691a4SSebastian Ott int rc = -ENODEV; 1257b206181dSStefan Haberland 1258b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1259b206181dSStefan Haberland if (!(lpm & opm)) 1260b206181dSStefan Haberland continue; 1261b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1262b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1263b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1264b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1265b206181dSStefan Haberland data->rcd_buffer, 1266b206181dSStefan Haberland lpm); 1267b206181dSStefan Haberland 1268b206181dSStefan Haberland if (rc) { 1269b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1270b206181dSStefan Haberland continue; 1271b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1272b206181dSStefan Haberland "Read configuration data " 1273b206181dSStefan Haberland "returned error %d", rc); 1274b206181dSStefan Haberland break; 1275b206181dSStefan Haberland } 1276b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1277b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1278b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1279b206181dSStefan Haberland rc = -ENODEV; 1280b206181dSStefan Haberland } else /* first valid path is enough */ 1281b206181dSStefan Haberland break; 1282b206181dSStefan Haberland } 1283b206181dSStefan Haberland 1284b206181dSStefan Haberland if (!rc) 1285b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1286b206181dSStefan Haberland 1287b206181dSStefan Haberland return rc; 1288b206181dSStefan Haberland } 1289b206181dSStefan Haberland 1290*b7294932SJan Höppner static void dasd_eckd_path_available_action(struct dasd_device *device, 1291*b7294932SJan Höppner struct pe_handler_work_data *data) 1292a4d26c6aSStefan Weinhuber { 1293b206181dSStefan Haberland struct dasd_eckd_private path_private; 1294b206181dSStefan Haberland struct dasd_uid *uid; 1295b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12965db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 129746018121SJan Höppner struct dasd_conf_data *conf_data; 1298a4d26c6aSStefan Weinhuber unsigned long flags; 1299b206181dSStefan Haberland char print_uid[60]; 130046018121SJan Höppner int rc, pos; 1301a4d26c6aSStefan Weinhuber 1302a4d26c6aSStefan Weinhuber opm = 0; 1303a4d26c6aSStefan Weinhuber npm = 0; 1304a4d26c6aSStefan Weinhuber ppm = 0; 1305a4d26c6aSStefan Weinhuber epm = 0; 13065db8440cSStefan Haberland hpfpm = 0; 13075db8440cSStefan Haberland cablepm = 0; 13085db8440cSStefan Haberland 1309a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1310b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1311b206181dSStefan Haberland continue; 1312b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1313a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1314a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1315a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1316a4d26c6aSStefan Weinhuber data->rcd_buffer, 1317a4d26c6aSStefan Weinhuber lpm); 1318a4d26c6aSStefan Weinhuber if (!rc) { 1319a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1320b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1321b206181dSStefan Haberland ) { 1322a4d26c6aSStefan Weinhuber case 0x02: 1323a4d26c6aSStefan Weinhuber npm |= lpm; 1324a4d26c6aSStefan Weinhuber break; 1325a4d26c6aSStefan Weinhuber case 0x03: 1326a4d26c6aSStefan Weinhuber ppm |= lpm; 1327a4d26c6aSStefan Weinhuber break; 1328a4d26c6aSStefan Weinhuber } 1329a4d26c6aSStefan Weinhuber opm |= lpm; 1330a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1331a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1332a4d26c6aSStefan Weinhuber "path verification: No configuration " 1333a4d26c6aSStefan Weinhuber "data retrieved"); 1334a4d26c6aSStefan Weinhuber opm |= lpm; 1335a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1336a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1337a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1338a4d26c6aSStefan Weinhuber " try again later"); 1339a4d26c6aSStefan Weinhuber epm |= lpm; 1340a4d26c6aSStefan Weinhuber } else { 1341a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1342a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1343a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1344a4d26c6aSStefan Weinhuber continue; 1345a4d26c6aSStefan Weinhuber } 1346a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1347a4d26c6aSStefan Weinhuber opm &= ~lpm; 1348a4d26c6aSStefan Weinhuber npm &= ~lpm; 1349a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13505db8440cSStefan Haberland hpfpm |= lpm; 1351b206181dSStefan Haberland continue; 1352b206181dSStefan Haberland } 1353b206181dSStefan Haberland 1354b206181dSStefan Haberland /* 1355b206181dSStefan Haberland * save conf_data for comparison after 1356b206181dSStefan Haberland * rebuild_device_uid may have changed 1357b206181dSStefan Haberland * the original data 1358b206181dSStefan Haberland */ 1359b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1360b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1361b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1362b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1363b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1364b206181dSStefan Haberland path_private.conf_data = NULL; 1365b206181dSStefan Haberland path_private.conf_len = 0; 1366b206181dSStefan Haberland continue; 1367b206181dSStefan Haberland } 1368b206181dSStefan Haberland 1369b206181dSStefan Haberland /* 1370b206181dSStefan Haberland * compare path UID with device UID only if at least 1371b206181dSStefan Haberland * one valid path is left 1372b206181dSStefan Haberland * in other case the device UID may have changed and 1373b206181dSStefan Haberland * the first working path UID will be used as device UID 1374b206181dSStefan Haberland */ 1375c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1376b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1377b206181dSStefan Haberland /* 1378b206181dSStefan Haberland * the comparison was not successful 1379b206181dSStefan Haberland * rebuild the device UID with at least one 1380b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1381b206181dSStefan Haberland * has changed the device 1382b206181dSStefan Haberland * 1383b206181dSStefan Haberland * after this compare again 1384b206181dSStefan Haberland * 1385b206181dSStefan Haberland * if either the rebuild or the recompare fails 1386b206181dSStefan Haberland * the path can not be used 1387b206181dSStefan Haberland */ 1388b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1389b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1390b206181dSStefan Haberland device, &path_private)) { 1391b206181dSStefan Haberland uid = &path_private.uid; 1392b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1393b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1394b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1395b206181dSStefan Haberland uid->vendor, uid->serial, 1396b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1397b206181dSStefan Haberland uid->vduit); 1398b206181dSStefan Haberland else 1399b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1400b206181dSStefan Haberland "%s.%s.%04x.%02x", 1401b206181dSStefan Haberland uid->vendor, uid->serial, 1402b206181dSStefan Haberland uid->ssid, 1403b206181dSStefan Haberland uid->real_unit_addr); 1404b206181dSStefan Haberland dev_err(&device->cdev->dev, 1405b206181dSStefan Haberland "The newly added channel path %02X " 1406b206181dSStefan Haberland "will not be used because it leads " 1407b206181dSStefan Haberland "to a different device %s\n", 1408b206181dSStefan Haberland lpm, print_uid); 1409b206181dSStefan Haberland opm &= ~lpm; 1410b206181dSStefan Haberland npm &= ~lpm; 1411b206181dSStefan Haberland ppm &= ~lpm; 14125db8440cSStefan Haberland cablepm |= lpm; 1413b206181dSStefan Haberland continue; 1414a4d26c6aSStefan Weinhuber } 1415a4d26c6aSStefan Weinhuber } 1416b206181dSStefan Haberland 141746018121SJan Höppner conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); 141846018121SJan Höppner if (conf_data) { 141946018121SJan Höppner memcpy(conf_data, data->rcd_buffer, 142046018121SJan Höppner DASD_ECKD_RCD_DATA_SIZE); 142146018121SJan Höppner } 142246018121SJan Höppner pos = pathmask_to_pos(lpm); 142346018121SJan Höppner dasd_eckd_store_conf_data(device, conf_data, pos); 142446018121SJan Höppner 1425a4d26c6aSStefan Weinhuber /* 1426a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1427a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1428a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1429a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1430a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1431a4d26c6aSStefan Weinhuber */ 1432a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1433c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1434c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1435a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14365db8440cSStefan Haberland } else { 1437c9346151SStefan Haberland dasd_path_add_opm(device, opm); 14385db8440cSStefan Haberland } 1439c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1440c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1441c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1442c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1443c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1444a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 144519508b20SJan Höppner 144619508b20SJan Höppner dasd_path_create_kobj(device, pos); 1447b206181dSStefan Haberland } 1448*b7294932SJan Höppner } 1449*b7294932SJan Höppner 1450*b7294932SJan Höppner static void do_pe_handler_work(struct work_struct *work) 1451*b7294932SJan Höppner { 1452*b7294932SJan Höppner struct pe_handler_work_data *data; 1453*b7294932SJan Höppner struct dasd_device *device; 1454*b7294932SJan Höppner 1455*b7294932SJan Höppner data = container_of(work, struct pe_handler_work_data, worker); 1456*b7294932SJan Höppner device = data->device; 1457*b7294932SJan Höppner 1458*b7294932SJan Höppner /* delay path verification until device was resumed */ 1459*b7294932SJan Höppner if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1460*b7294932SJan Höppner schedule_work(work); 1461*b7294932SJan Höppner return; 1462*b7294932SJan Höppner } 1463*b7294932SJan Höppner /* check if path verification already running and delay if so */ 1464*b7294932SJan Höppner if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 1465*b7294932SJan Höppner schedule_work(work); 1466*b7294932SJan Höppner return; 1467*b7294932SJan Höppner } 1468*b7294932SJan Höppner 1469*b7294932SJan Höppner dasd_eckd_path_available_action(device, data); 1470*b7294932SJan Höppner 14711eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1472a4d26c6aSStefan Weinhuber dasd_put_device(device); 1473a4d26c6aSStefan Weinhuber if (data->isglobal) 1474*b7294932SJan Höppner mutex_unlock(&dasd_pe_handler_mutex); 1475a4d26c6aSStefan Weinhuber else 1476a4d26c6aSStefan Weinhuber kfree(data); 1477a4d26c6aSStefan Weinhuber } 1478a4d26c6aSStefan Weinhuber 1479*b7294932SJan Höppner static int dasd_eckd_pe_handler(struct dasd_device *device, __u8 lpm) 1480a4d26c6aSStefan Weinhuber { 1481*b7294932SJan Höppner struct pe_handler_work_data *data; 1482a4d26c6aSStefan Weinhuber 1483a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1484a4d26c6aSStefan Weinhuber if (!data) { 1485*b7294932SJan Höppner if (mutex_trylock(&dasd_pe_handler_mutex)) { 1486*b7294932SJan Höppner data = pe_handler_worker; 1487a4d26c6aSStefan Weinhuber data->isglobal = 1; 1488*b7294932SJan Höppner } else { 1489a4d26c6aSStefan Weinhuber return -ENOMEM; 1490*b7294932SJan Höppner } 1491a4d26c6aSStefan Weinhuber } else { 1492a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1493a4d26c6aSStefan Weinhuber data->isglobal = 0; 1494a4d26c6aSStefan Weinhuber } 1495*b7294932SJan Höppner INIT_WORK(&data->worker, do_pe_handler_work); 1496a4d26c6aSStefan Weinhuber dasd_get_device(device); 1497a4d26c6aSStefan Weinhuber data->device = device; 1498a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1499a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1500a4d26c6aSStefan Weinhuber return 0; 1501a4d26c6aSStefan Weinhuber } 1502a4d26c6aSStefan Weinhuber 1503a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1504a521b048SStefan Haberland { 1505a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1506a521b048SStefan Haberland unsigned long flags; 1507a521b048SStefan Haberland 1508a521b048SStefan Haberland if (!private->fcx_max_data) 1509a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1510a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1511a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1512a521b048SStefan Haberland dasd_schedule_device_bh(device); 1513a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1514a521b048SStefan Haberland } 1515a521b048SStefan Haberland 15168e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 15178e09f215SStefan Weinhuber { 1518543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 15198e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 15208e09f215SStefan Weinhuber struct dasd_rssd_features *features; 15218e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 15228e09f215SStefan Weinhuber struct ccw1 *ccw; 15238e09f215SStefan Weinhuber int rc; 15248e09f215SStefan Weinhuber 152568d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 152668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 15278e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 15288e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1529c5205f2fSSebastian Ott device, NULL); 15308e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1531b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1532b8ed5dd5SStefan Haberland "allocate initialization request"); 15338e09f215SStefan Weinhuber return PTR_ERR(cqr); 15348e09f215SStefan Weinhuber } 15358e09f215SStefan Weinhuber cqr->startdev = device; 15368e09f215SStefan Weinhuber cqr->memdev = device; 15378e09f215SStefan Weinhuber cqr->block = NULL; 1538eb6e199bSStefan Weinhuber cqr->retries = 256; 15398e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 15408e09f215SStefan Weinhuber 15418e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 15428e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15438e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 15448e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 15458e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 15468e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 15478e09f215SStefan Weinhuber 15488e09f215SStefan Weinhuber ccw = cqr->cpaddr; 15498e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 15508e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 15518e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 15528e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 15538e09f215SStefan Weinhuber 15548e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 15558e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15568e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15578e09f215SStefan Weinhuber 15588e09f215SStefan Weinhuber ccw++; 15598e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15608e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 15618e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 15628e09f215SStefan Weinhuber 15631aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15648e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15658e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15668e09f215SStefan Weinhuber if (rc == 0) { 15678e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15688e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15698e09f215SStefan Weinhuber memcpy(&private->features, features, 15708e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 157168d1e5f0SStefan Weinhuber } else 157268d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 157368d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15758e09f215SStefan Weinhuber return rc; 15768e09f215SStefan Weinhuber } 15778e09f215SStefan Weinhuber 1578c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1579c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1580c729696bSJan Höppner { 1581c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1582c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1583c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1584c729696bSJan Höppner struct dasd_ccw_req *cqr; 1585c729696bSJan Höppner struct ccw1 *ccw; 15869e12e54cSJan Höppner int useglobal; 1587c729696bSJan Höppner int rc; 1588c729696bSJan Höppner 1589c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1590c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1591c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1592c729696bSJan Höppner return 0; 1593c729696bSJan Höppner 15949e12e54cSJan Höppner useglobal = 0; 1595c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1596c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1597c729696bSJan Höppner if (IS_ERR(cqr)) { 1598c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1599c729696bSJan Höppner "Could not allocate initialization request"); 16009e12e54cSJan Höppner mutex_lock(&dasd_vol_info_mutex); 16019e12e54cSJan Höppner useglobal = 1; 16029e12e54cSJan Höppner cqr = &dasd_vol_info_req->cqr; 16039e12e54cSJan Höppner memset(cqr, 0, sizeof(*cqr)); 16049e12e54cSJan Höppner memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 16059e12e54cSJan Höppner cqr->cpaddr = &dasd_vol_info_req->ccw; 16069e12e54cSJan Höppner cqr->data = &dasd_vol_info_req->data; 16079e12e54cSJan Höppner cqr->magic = DASD_ECKD_MAGIC; 1608c729696bSJan Höppner } 1609c729696bSJan Höppner 1610c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1611c729696bSJan Höppner prssdp = cqr->data; 1612c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1613c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1614c729696bSJan Höppner prssdp->lss = private->ned->ID; 1615c729696bSJan Höppner prssdp->volume = private->ned->unit_addr; 1616c729696bSJan Höppner 1617c729696bSJan Höppner ccw = cqr->cpaddr; 1618c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1619c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1620c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1621c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1622c729696bSJan Höppner 1623c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1624c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1625c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1626c729696bSJan Höppner 1627c729696bSJan Höppner ccw++; 1628c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1629c729696bSJan Höppner ccw->count = sizeof(*vsq); 1630c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1631c729696bSJan Höppner ccw->cda = (__u32)(addr_t)vsq; 1632c729696bSJan Höppner 1633c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1634c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1635c729696bSJan Höppner cqr->startdev = device; 1636c729696bSJan Höppner cqr->memdev = device; 1637c729696bSJan Höppner cqr->block = NULL; 1638c729696bSJan Höppner cqr->retries = 256; 1639c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1640c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1641c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1642c729696bSJan Höppner 1643c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1644c729696bSJan Höppner if (rc == 0) { 1645c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1646c729696bSJan Höppner } else { 1647dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1648dd454839SJan Höppner "Reading the volume storage information failed with rc=%d", rc); 1649c729696bSJan Höppner } 1650c729696bSJan Höppner 16519e12e54cSJan Höppner if (useglobal) 16529e12e54cSJan Höppner mutex_unlock(&dasd_vol_info_mutex); 16539e12e54cSJan Höppner else 1654c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1655c729696bSJan Höppner 1656c729696bSJan Höppner return rc; 1657c729696bSJan Höppner } 1658c729696bSJan Höppner 1659c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1660c729696bSJan Höppner { 1661c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1662c729696bSJan Höppner 1663c729696bSJan Höppner return private->vsq.vol_info.ese; 1664c729696bSJan Höppner } 1665c729696bSJan Höppner 1666c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1667c729696bSJan Höppner { 1668c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1669c729696bSJan Höppner 1670c729696bSJan Höppner return private->vsq.extent_pool_id; 1671c729696bSJan Höppner } 1672c729696bSJan Höppner 1673c729696bSJan Höppner /* 1674c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1675c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1676c729696bSJan Höppner * The data for this value is therefore updated on any call. 1677c729696bSJan Höppner */ 1678c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1679c729696bSJan Höppner { 1680c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1681c729696bSJan Höppner int rc; 1682c729696bSJan Höppner 1683c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1684c729696bSJan Höppner 1685c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1686c729696bSJan Höppner } 1687c729696bSJan Höppner 1688c729696bSJan Höppner /* 1689c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1690c729696bSJan Höppner * therefore updated on any call. 1691c729696bSJan Höppner */ 1692c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1693c729696bSJan Höppner { 1694c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1695c729696bSJan Höppner int rc; 1696c729696bSJan Höppner 1697c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1698c729696bSJan Höppner 1699c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1700c729696bSJan Höppner } 1701c729696bSJan Höppner 1702c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1703c729696bSJan Höppner { 1704c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1705c729696bSJan Höppner 1706c729696bSJan Höppner return private->vsq.logical_capacity; 1707c729696bSJan Höppner } 1708c729696bSJan Höppner 17099e12e54cSJan Höppner static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 17109e12e54cSJan Höppner { 17119e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17129e12e54cSJan Höppner struct dasd_device *device; 17139e12e54cSJan Höppner struct dasd_device *base; 17149e12e54cSJan Höppner 17159e12e54cSJan Höppner data = container_of(work, struct ext_pool_exhaust_work_data, worker); 17169e12e54cSJan Höppner device = data->device; 17179e12e54cSJan Höppner base = data->base; 17189e12e54cSJan Höppner 17199e12e54cSJan Höppner if (!base) 17209e12e54cSJan Höppner base = device; 17219e12e54cSJan Höppner if (dasd_eckd_space_configured(base) != 0) { 17229e12e54cSJan Höppner dasd_generic_space_avail(device); 17239e12e54cSJan Höppner } else { 17249e12e54cSJan Höppner dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 17259e12e54cSJan Höppner DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 17269e12e54cSJan Höppner } 17279e12e54cSJan Höppner 17289e12e54cSJan Höppner dasd_put_device(device); 17299e12e54cSJan Höppner kfree(data); 17309e12e54cSJan Höppner } 17319e12e54cSJan Höppner 17329e12e54cSJan Höppner static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 17339e12e54cSJan Höppner struct dasd_ccw_req *cqr) 17349e12e54cSJan Höppner { 17359e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 17369e12e54cSJan Höppner 17379e12e54cSJan Höppner data = kzalloc(sizeof(*data), GFP_ATOMIC); 17389e12e54cSJan Höppner if (!data) 17399e12e54cSJan Höppner return -ENOMEM; 17409e12e54cSJan Höppner INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 17419e12e54cSJan Höppner dasd_get_device(device); 17429e12e54cSJan Höppner data->device = device; 17439e12e54cSJan Höppner 17449e12e54cSJan Höppner if (cqr->block) 17459e12e54cSJan Höppner data->base = cqr->block->base; 17469e12e54cSJan Höppner else if (cqr->basedev) 17479e12e54cSJan Höppner data->base = cqr->basedev; 17489e12e54cSJan Höppner else 17499e12e54cSJan Höppner data->base = NULL; 17509e12e54cSJan Höppner 17519e12e54cSJan Höppner schedule_work(&data->worker); 17529e12e54cSJan Höppner 17539e12e54cSJan Höppner return 0; 17549e12e54cSJan Höppner } 17559e12e54cSJan Höppner 1756c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1757c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1758c729696bSJan Höppner { 1759c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1760c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1761c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1762c729696bSJan Höppner int i; 1763c729696bSJan Höppner 1764c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1765c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1766c729696bSJan Höppner if (eps.pool_id == pool_id) { 1767c729696bSJan Höppner memcpy(&private->eps, &eps, 1768c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1769c729696bSJan Höppner } 1770c729696bSJan Höppner } 1771c729696bSJan Höppner } 1772c729696bSJan Höppner 1773c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1774c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1775c729696bSJan Höppner { 1776c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1777c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1778c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1779c729696bSJan Höppner struct dasd_ccw_req *cqr; 1780c729696bSJan Höppner struct ccw1 *ccw; 1781c729696bSJan Höppner int rc; 1782c729696bSJan Höppner 1783c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1784c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1785c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1786c729696bSJan Höppner return 0; 1787c729696bSJan Höppner 1788c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1789c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1790c729696bSJan Höppner if (IS_ERR(cqr)) { 1791c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1792c729696bSJan Höppner "Could not allocate initialization request"); 1793c729696bSJan Höppner return PTR_ERR(cqr); 1794c729696bSJan Höppner } 1795c729696bSJan Höppner 1796c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1797c729696bSJan Höppner prssdp = cqr->data; 1798c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1799c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1800c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1801c729696bSJan Höppner 1802c729696bSJan Höppner ccw = cqr->cpaddr; 1803c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1804c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1805c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1806c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1807c729696bSJan Höppner 1808c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1809c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1810c729696bSJan Höppner 1811c729696bSJan Höppner ccw++; 1812c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1813c729696bSJan Höppner ccw->count = sizeof(*lcq); 1814c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1815c729696bSJan Höppner ccw->cda = (__u32)(addr_t)lcq; 1816c729696bSJan Höppner 1817c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1818c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1819c729696bSJan Höppner cqr->startdev = device; 1820c729696bSJan Höppner cqr->memdev = device; 1821c729696bSJan Höppner cqr->block = NULL; 1822c729696bSJan Höppner cqr->retries = 256; 1823c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1824c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1825c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1826c729696bSJan Höppner 1827c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1828c729696bSJan Höppner if (rc == 0) { 1829c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1830c729696bSJan Höppner } else { 1831dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1832dd454839SJan Höppner "Reading the logical configuration failed with rc=%d", rc); 1833c729696bSJan Höppner } 1834c729696bSJan Höppner 1835c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1836c729696bSJan Höppner 1837c729696bSJan Höppner return rc; 1838c729696bSJan Höppner } 1839c729696bSJan Höppner 1840c729696bSJan Höppner /* 1841c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1842c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1843c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1844c729696bSJan Höppner */ 1845c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1846c729696bSJan Höppner { 1847c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1848c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1849c729696bSJan Höppner 1850c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1851c729696bSJan Höppner return 0; 1852c729696bSJan Höppner if (eps.extent_size.size_1G) 1853c729696bSJan Höppner return 1113; 1854c729696bSJan Höppner if (eps.extent_size.size_16M) 1855c729696bSJan Höppner return 21; 1856c729696bSJan Höppner 1857c729696bSJan Höppner return 0; 1858c729696bSJan Höppner } 1859c729696bSJan Höppner 1860c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1861c729696bSJan Höppner { 1862c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1863c729696bSJan Höppner 1864c729696bSJan Höppner return private->eps.warn_thrshld; 1865c729696bSJan Höppner } 1866c729696bSJan Höppner 1867c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1868c729696bSJan Höppner { 1869c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1870c729696bSJan Höppner 1871c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1872c729696bSJan Höppner } 1873c729696bSJan Höppner 1874c729696bSJan Höppner /* 1875c729696bSJan Höppner * Extent Pool out of space 1876c729696bSJan Höppner */ 1877c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1878c729696bSJan Höppner { 1879c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1880c729696bSJan Höppner 1881c729696bSJan Höppner return private->eps.flags.pool_oos; 1882c729696bSJan Höppner } 18838e09f215SStefan Weinhuber 18843d052595SHorst Hummel /* 188540545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 188640545573SHorst Hummel */ 1887f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1888f3eb5384SStefan Weinhuber int enable_pav) 188940545573SHorst Hummel { 189040545573SHorst Hummel struct dasd_ccw_req *cqr; 189140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 189240545573SHorst Hummel struct ccw1 *ccw; 189340545573SHorst Hummel 189468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 189540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1896c5205f2fSSebastian Ott device, NULL); 189740545573SHorst Hummel 189840545573SHorst Hummel if (IS_ERR(cqr)) { 1899fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 190040545573SHorst Hummel "Could not allocate PSF-SSC request"); 190140545573SHorst Hummel return cqr; 190240545573SHorst Hummel } 190340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 190440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1905626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1906f3eb5384SStefan Weinhuber if (enable_pav) { 1907626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 19088e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1909f3eb5384SStefan Weinhuber } 191040545573SHorst Hummel ccw = cqr->cpaddr; 191140545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 191240545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 191340545573SHorst Hummel ccw->count = 66; 191440545573SHorst Hummel 19158e09f215SStefan Weinhuber cqr->startdev = device; 19168e09f215SStefan Weinhuber cqr->memdev = device; 19178e09f215SStefan Weinhuber cqr->block = NULL; 1918eb6e199bSStefan Weinhuber cqr->retries = 256; 191940545573SHorst Hummel cqr->expires = 10*HZ; 19201aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 192140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 192240545573SHorst Hummel return cqr; 192340545573SHorst Hummel } 192440545573SHorst Hummel 192540545573SHorst Hummel /* 192640545573SHorst Hummel * Perform Subsystem Function. 192740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 192840545573SHorst Hummel * call might change behaviour of DASD devices. 192940545573SHorst Hummel */ 193040545573SHorst Hummel static int 193112d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 193212d7b107SStefan Haberland unsigned long flags) 193340545573SHorst Hummel { 193440545573SHorst Hummel struct dasd_ccw_req *cqr; 193540545573SHorst Hummel int rc; 193640545573SHorst Hummel 1937f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 193840545573SHorst Hummel if (IS_ERR(cqr)) 193940545573SHorst Hummel return PTR_ERR(cqr); 194040545573SHorst Hummel 194112d7b107SStefan Haberland /* 194212d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 194312d7b107SStefan Haberland * the calling function should handle failed requests 194412d7b107SStefan Haberland */ 194512d7b107SStefan Haberland cqr->flags |= flags; 194612d7b107SStefan Haberland 194740545573SHorst Hummel rc = dasd_sleep_on(cqr); 194840545573SHorst Hummel if (!rc) 194940545573SHorst Hummel /* trigger CIO to reprobe devices */ 195040545573SHorst Hummel css_schedule_reprobe(); 195112d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 195212d7b107SStefan Haberland rc = -EAGAIN; 195312d7b107SStefan Haberland 19548e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 195540545573SHorst Hummel return rc; 195640545573SHorst Hummel } 195740545573SHorst Hummel 195840545573SHorst Hummel /* 195940545573SHorst Hummel * Valide storage server of current device. 196040545573SHorst Hummel */ 196112d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 196212d7b107SStefan Haberland unsigned long flags) 196340545573SHorst Hummel { 1964543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1965543691a4SSebastian Ott int enable_pav, rc; 196640545573SHorst Hummel 1967f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1968f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 196912d7b107SStefan Haberland return 0; 197040545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1971f3eb5384SStefan Weinhuber enable_pav = 0; 1972f3eb5384SStefan Weinhuber else 1973f3eb5384SStefan Weinhuber enable_pav = 1; 197412d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1975eb6e199bSStefan Weinhuber 197640545573SHorst Hummel /* may be requested feature is not available on server, 197740545573SHorst Hummel * therefore just report error and go ahead */ 1978b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1979b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 198012d7b107SStefan Haberland return rc; 198140545573SHorst Hummel } 198240545573SHorst Hummel 1983f1633031SStefan Haberland /* 1984f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1985f1633031SStefan Haberland */ 1986f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1987f1633031SStefan Haberland { 1988f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1989f1633031SStefan Haberland kick_validate); 1990ea4da6eaSStefan Haberland unsigned long flags = 0; 1991ea4da6eaSStefan Haberland 1992ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1993ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 199412d7b107SStefan Haberland == -EAGAIN) { 199512d7b107SStefan Haberland /* schedule worker again if failed */ 199612d7b107SStefan Haberland schedule_work(&device->kick_validate); 199712d7b107SStefan Haberland return; 199812d7b107SStefan Haberland } 199912d7b107SStefan Haberland 2000f1633031SStefan Haberland dasd_put_device(device); 2001f1633031SStefan Haberland } 2002f1633031SStefan Haberland 2003f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 2004f1633031SStefan Haberland { 2005f1633031SStefan Haberland dasd_get_device(device); 200625e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 200725e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 200825e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 200925e2cf1cSStefan Haberland dasd_put_device(device); 201025e2cf1cSStefan Haberland return; 201125e2cf1cSStefan Haberland } 2012f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 2013f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 2014f2608cd4SStefan Haberland dasd_put_device(device); 2015f1633031SStefan Haberland } 2016f1633031SStefan Haberland 201740545573SHorst Hummel /* 20183d052595SHorst Hummel * Check device characteristics. 20193d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 20203d052595SHorst Hummel */ 20211da177e4SLinus Torvalds static int 20221da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 20231da177e4SLinus Torvalds { 2024543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 20258e09f215SStefan Weinhuber struct dasd_block *block; 20262dedf0d9SStefan Haberland struct dasd_uid temp_uid; 2027f9f8d02fSStefan Haberland int rc, i; 202833b62a30SStefan Weinhuber int readonly; 20297c8faa86SStefan Haberland unsigned long value; 20301da177e4SLinus Torvalds 2031f1633031SStefan Haberland /* setup work queue for validate server*/ 2032f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 203359a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 203459a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 2035f1633031SStefan Haberland 2036454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 2037454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 2038454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 2039454e1fa1SPeter Oberparleiter return -EIO; 2040454e1fa1SPeter Oberparleiter } 2041454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 2042454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 2043454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 2044454e1fa1SPeter Oberparleiter } 204592636b15SSebastian Ott if (!private) { 204692636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 204792636b15SSebastian Ott if (!private) { 2048fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2049fc19f381SStefan Haberland "Allocating memory for private DASD data " 2050fc19f381SStefan Haberland "failed\n"); 20511da177e4SLinus Torvalds return -ENOMEM; 20521da177e4SLinus Torvalds } 2053543691a4SSebastian Ott device->private = private; 205492636b15SSebastian Ott } else { 205592636b15SSebastian Ott memset(private, 0, sizeof(*private)); 20561da177e4SLinus Torvalds } 20571da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 20581da177e4SLinus Torvalds private->init_cqr_status = -1; 20591da177e4SLinus Torvalds /* Set default cache operations. */ 20601da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 20611da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 20621da177e4SLinus Torvalds 206340545573SHorst Hummel /* Read Configuration Data */ 206440545573SHorst Hummel rc = dasd_eckd_read_conf(device); 206540545573SHorst Hummel if (rc) 20668e09f215SStefan Weinhuber goto out_err1; 206740545573SHorst Hummel 2068a521b048SStefan Haberland /* set some default values */ 20697c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 20701f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 2071a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 2072a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 20731f1ee9adSHannes Reinecke 20747c8faa86SStefan Haberland if (private->gneq) { 20757c8faa86SStefan Haberland value = 1; 20767c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 20777c8faa86SStefan Haberland value = 10 * value; 20787c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 20797c8faa86SStefan Haberland /* do not accept useless values */ 20807c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 20817c8faa86SStefan Haberland device->default_expires = value; 20827c8faa86SStefan Haberland } 20837c8faa86SStefan Haberland 20842dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 20852dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 20868e09f215SStefan Weinhuber block = dasd_alloc_block(); 20878e09f215SStefan Weinhuber if (IS_ERR(block)) { 2088b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 2089b8ed5dd5SStefan Haberland "could not allocate dasd " 2090b8ed5dd5SStefan Haberland "block structure"); 20918e09f215SStefan Weinhuber rc = PTR_ERR(block); 20928e09f215SStefan Weinhuber goto out_err1; 20938e09f215SStefan Weinhuber } 20948e09f215SStefan Weinhuber device->block = block; 20958e09f215SStefan Weinhuber block->base = device; 20968e09f215SStefan Weinhuber } 20978e09f215SStefan Weinhuber 2098f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 2099f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 2100f9f8d02fSStefan Haberland if (rc) 21018e09f215SStefan Weinhuber goto out_err2; 2102f9f8d02fSStefan Haberland 210312d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 2104f4ac1d02SStefan Weinhuber 2105f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 2106f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 210740545573SHorst Hummel if (rc) 21088e09f215SStefan Weinhuber goto out_err3; 21098e09f215SStefan Weinhuber 211019508b20SJan Höppner dasd_path_create_kobjects(device); 211119508b20SJan Höppner 21128e09f215SStefan Weinhuber /* Read Feature Codes */ 211368d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 211440545573SHorst Hummel 2115c729696bSJan Höppner /* Read Volume Information */ 2116dd454839SJan Höppner dasd_eckd_read_vol_info(device); 2117c729696bSJan Höppner 2118c729696bSJan Höppner /* Read Extent Pool Information */ 2119dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 2120c729696bSJan Höppner 21211da177e4SLinus Torvalds /* Read Device Characteristics */ 212268b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 212368b781feSStefan Haberland &private->rdc_data, 64); 21248e09f215SStefan Weinhuber if (rc) { 2125b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2126b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 21278e09f215SStefan Weinhuber goto out_err3; 21288e09f215SStefan Weinhuber } 212934cd551aSStefan Haberland 213034cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 213134cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 213234cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 213334cd551aSStefan Haberland "support raw-track access\n"); 213434cd551aSStefan Haberland rc = -EINVAL; 213534cd551aSStefan Haberland goto out_err3; 213634cd551aSStefan Haberland } 213734cd551aSStefan Haberland 2138817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 2139b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2140b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 2141b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 2142b44b0ab3SStefan Weinhuber else 2143b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 2144b44b0ab3SStefan Weinhuber 2145ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 2146ef19298bSStefan Weinhuber 214733b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 214833b62a30SStefan Weinhuber if (readonly) 214933b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 215033b62a30SStefan Weinhuber 2151fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 215233b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 21531da177e4SLinus Torvalds private->rdc_data.dev_type, 21541da177e4SLinus Torvalds private->rdc_data.dev_model, 21551da177e4SLinus Torvalds private->rdc_data.cu_type, 21561da177e4SLinus Torvalds private->rdc_data.cu_model.model, 2157b44b0ab3SStefan Weinhuber private->real_cyl, 21581da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 215933b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 216033b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 21618e09f215SStefan Weinhuber return 0; 21628e09f215SStefan Weinhuber 21638e09f215SStefan Weinhuber out_err3: 21648e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 21658e09f215SStefan Weinhuber out_err2: 21668e09f215SStefan Weinhuber dasd_free_block(device->block); 21678e09f215SStefan Weinhuber device->block = NULL; 21688e09f215SStefan Weinhuber out_err1: 216900b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 21708e09f215SStefan Weinhuber kfree(device->private); 21718e09f215SStefan Weinhuber device->private = NULL; 21723d052595SHorst Hummel return rc; 21731da177e4SLinus Torvalds } 21741da177e4SLinus Torvalds 21758e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 21768e09f215SStefan Weinhuber { 2177543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21784abb08c2SStefan Weinhuber 21797c6553d4SStefan Haberland if (!private) 21807c6553d4SStefan Haberland return; 21817c6553d4SStefan Haberland 21828e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 21834abb08c2SStefan Weinhuber private->ned = NULL; 21844abb08c2SStefan Weinhuber private->sneq = NULL; 21854abb08c2SStefan Weinhuber private->vdsneq = NULL; 21864abb08c2SStefan Weinhuber private->gneq = NULL; 218700b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 21888e09f215SStefan Weinhuber } 21898e09f215SStefan Weinhuber 21901da177e4SLinus Torvalds static struct dasd_ccw_req * 21911da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 21921da177e4SLinus Torvalds { 2193543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21941da177e4SLinus Torvalds struct eckd_count *count_data; 21951da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 21961da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 21971da177e4SLinus Torvalds struct ccw1 *ccw; 21981da177e4SLinus Torvalds int cplength, datasize; 21991da177e4SLinus Torvalds int i; 22001da177e4SLinus Torvalds 22011da177e4SLinus Torvalds cplength = 8; 22021da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2203c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2204c5205f2fSSebastian Ott NULL); 22051da177e4SLinus Torvalds if (IS_ERR(cqr)) 22061da177e4SLinus Torvalds return cqr; 22071da177e4SLinus Torvalds ccw = cqr->cpaddr; 2208ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2209ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 221045f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 22111da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 22121da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 22131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22141da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 22151da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22161da177e4SLinus Torvalds 22171da177e4SLinus Torvalds count_data = private->count_area; 22181da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22201da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22211da177e4SLinus Torvalds ccw->flags = 0; 22221da177e4SLinus Torvalds ccw->count = 8; 22231da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 22241da177e4SLinus Torvalds ccw++; 22251da177e4SLinus Torvalds count_data++; 22261da177e4SLinus Torvalds } 22271da177e4SLinus Torvalds 2228ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 22291da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2230ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 22311da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 22321da177e4SLinus Torvalds /* Read count ccw. */ 22331da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22341da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22351da177e4SLinus Torvalds ccw->flags = 0; 22361da177e4SLinus Torvalds ccw->count = 8; 22371da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 22381da177e4SLinus Torvalds 22398e09f215SStefan Weinhuber cqr->block = NULL; 22408e09f215SStefan Weinhuber cqr->startdev = device; 22418e09f215SStefan Weinhuber cqr->memdev = device; 2242eb6e199bSStefan Weinhuber cqr->retries = 255; 22431aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 22441da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 22459e12e54cSJan Höppner /* Set flags to suppress output for expected errors */ 22469e12e54cSJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22479e12e54cSJan Höppner 22481da177e4SLinus Torvalds return cqr; 22491da177e4SLinus Torvalds } 22501da177e4SLinus Torvalds 2251eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2252eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2253eb6e199bSStefan Weinhuber { 2254eb6e199bSStefan Weinhuber char *sense; 2255eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2256eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2257eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2258eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2259eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2260eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2261eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2262eb6e199bSStefan Weinhuber else 2263eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2264eb6e199bSStefan Weinhuber } else 2265eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2266eb6e199bSStefan Weinhuber } 2267eb6e199bSStefan Weinhuber 22681da177e4SLinus Torvalds /* 22691da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 22701da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 22711da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 22721da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 22731da177e4SLinus Torvalds * for deletion in the meantime). 22741da177e4SLinus Torvalds */ 2275eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2276eb6e199bSStefan Weinhuber void *data) 22771da177e4SLinus Torvalds { 2278543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2279543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22801da177e4SLinus Torvalds 2281eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 22821da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 22831da177e4SLinus Torvalds dasd_kick_device(device); 22841da177e4SLinus Torvalds } 22851da177e4SLinus Torvalds 2286eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 22871da177e4SLinus Torvalds { 22881da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 22891da177e4SLinus Torvalds 22908e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 22911da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 22921da177e4SLinus Torvalds return PTR_ERR(init_cqr); 22931da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 22941da177e4SLinus Torvalds init_cqr->callback_data = NULL; 22951da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2296eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2297eb6e199bSStefan Weinhuber * devices as special case 2298eb6e199bSStefan Weinhuber */ 2299eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2300eb6e199bSStefan Weinhuber init_cqr->retries = 0; 23011da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 23021da177e4SLinus Torvalds return -EAGAIN; 23031da177e4SLinus Torvalds } 23041da177e4SLinus Torvalds 2305eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 23061da177e4SLinus Torvalds { 2307543691a4SSebastian Ott struct dasd_device *device = block->base; 2308543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 23091da177e4SLinus Torvalds struct eckd_count *count_area; 23101da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 23111da177e4SLinus Torvalds int status, i; 2312eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 23131da177e4SLinus Torvalds 23141da177e4SLinus Torvalds status = private->init_cqr_status; 23151da177e4SLinus Torvalds private->init_cqr_status = -1; 2316eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2317eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2318eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2319eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2320eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2321eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2322eb6e199bSStefan Weinhuber } 2323eb6e199bSStefan Weinhuber 2324e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2325e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2326e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2327e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2328e4dbb0f2SStefan Haberland goto raw; 2329e4dbb0f2SStefan Haberland } 2330e4dbb0f2SStefan Haberland 2331eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2332eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 23331da177e4SLinus Torvalds return -EMEDIUMTYPE; 2334eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2335eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2336eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2337eb6e199bSStefan Weinhuber "of an I/O error\n"); 2338eb6e199bSStefan Weinhuber return -EIO; 23391da177e4SLinus Torvalds } 23401da177e4SLinus Torvalds 23411da177e4SLinus Torvalds private->uses_cdl = 1; 23421da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 23431da177e4SLinus Torvalds count_area = NULL; 23441da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 23451da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 23463bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 23473bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23483bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23493bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 23501da177e4SLinus Torvalds private->uses_cdl = 0; 23511da177e4SLinus Torvalds break; 23521da177e4SLinus Torvalds } 23531da177e4SLinus Torvalds } 23541da177e4SLinus Torvalds if (i == 3) 2355ce6915f5SJan Höppner count_area = &private->count_area[3]; 23561da177e4SLinus Torvalds 23571da177e4SLinus Torvalds if (private->uses_cdl == 0) { 23581da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 23591da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 23601da177e4SLinus Torvalds (private->count_area[i].dl != 23613bc9fef9SStefan Haberland private->count_area[0].dl) || 23623bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 23633bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 23643bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 23651da177e4SLinus Torvalds break; 23661da177e4SLinus Torvalds } 23671da177e4SLinus Torvalds if (i == 5) 23681da177e4SLinus Torvalds count_area = &private->count_area[0]; 23691da177e4SLinus Torvalds } else { 23701da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2371fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2372fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 23731da177e4SLinus Torvalds } 2374e4dbb0f2SStefan Haberland 23751da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 23761da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 23771da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 23788e09f215SStefan Weinhuber block->bp_block = count_area->dl; 23791da177e4SLinus Torvalds } 23808e09f215SStefan Weinhuber if (block->bp_block == 0) { 2381fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2382fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 23831da177e4SLinus Torvalds return -EMEDIUMTYPE; 23841da177e4SLinus Torvalds } 23858e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 23868e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 23878e09f215SStefan Weinhuber block->s2b_shift++; 23881da177e4SLinus Torvalds 23898e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2390e4dbb0f2SStefan Haberland 2391e4dbb0f2SStefan Haberland raw: 23922cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 23931da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23941da177e4SLinus Torvalds blk_per_trk); 23951da177e4SLinus Torvalds 2396fc19f381SStefan Haberland dev_info(&device->cdev->dev, 23972cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2398fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 23992cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 24001da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 24018e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 24028e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 24031da177e4SLinus Torvalds private->uses_cdl ? 24041da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 24051da177e4SLinus Torvalds 24061da177e4SLinus Torvalds return 0; 24071da177e4SLinus Torvalds } 24081da177e4SLinus Torvalds 24098e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 24101da177e4SLinus Torvalds { 2411543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24121da177e4SLinus Torvalds 24131da177e4SLinus Torvalds if (private->init_cqr_status < 0) 24148e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 24151da177e4SLinus Torvalds else 24168e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 24171da177e4SLinus Torvalds } 24181da177e4SLinus Torvalds 2419d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 24208e09f215SStefan Weinhuber { 24218e09f215SStefan Weinhuber return dasd_alias_add_device(device); 24228e09f215SStefan Weinhuber }; 24238e09f215SStefan Weinhuber 24248e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 24258e09f215SStefan Weinhuber { 2426669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2427669f3765SStefan Haberland dasd_put_device(device); 2428669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2429669f3765SStefan Haberland dasd_put_device(device); 2430669f3765SStefan Haberland 2431d42e1712SStefan Haberland return 0; 2432d42e1712SStefan Haberland }; 2433d42e1712SStefan Haberland 2434daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2435d42e1712SStefan Haberland { 24368e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 24378e09f215SStefan Weinhuber }; 24388e09f215SStefan Weinhuber 24391da177e4SLinus Torvalds static int 24408e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 24411da177e4SLinus Torvalds { 2442543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 24431da177e4SLinus Torvalds 24448e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 24451da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 24468e09f215SStefan Weinhuber 0, block->bp_block); 24471da177e4SLinus Torvalds } 24481da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 24491da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 24501da177e4SLinus Torvalds return 0; 24511da177e4SLinus Torvalds } 24521da177e4SLinus Torvalds 24538fd57520SJan Höppner /* 24548fd57520SJan Höppner * Build the TCW request for the format check 24558fd57520SJan Höppner */ 24568fd57520SJan Höppner static struct dasd_ccw_req * 24578fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 24588fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 24598fd57520SJan Höppner int rpt) 24608fd57520SJan Höppner { 24618fd57520SJan Höppner struct dasd_eckd_private *start_priv; 24628fd57520SJan Höppner struct dasd_device *startdev = NULL; 24638fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 24648fd57520SJan Höppner struct dasd_ccw_req *cqr; 24658fd57520SJan Höppner struct itcw *itcw; 24668fd57520SJan Höppner int itcw_size; 24678fd57520SJan Höppner int count; 24688fd57520SJan Höppner int rc; 24698fd57520SJan Höppner int i; 24708fd57520SJan Höppner 24718fd57520SJan Höppner if (enable_pav) 24728fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 24738fd57520SJan Höppner 24748fd57520SJan Höppner if (!startdev) 24758fd57520SJan Höppner startdev = base; 24768fd57520SJan Höppner 24778fd57520SJan Höppner start_priv = startdev->private; 24788fd57520SJan Höppner 24798fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24808fd57520SJan Höppner 24818fd57520SJan Höppner /* 24828fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 24838fd57520SJan Höppner * calculate the corresponding itcw_size 24848fd57520SJan Höppner */ 24858fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 24868fd57520SJan Höppner 24875e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 24888fd57520SJan Höppner if (IS_ERR(cqr)) 24898fd57520SJan Höppner return cqr; 24908fd57520SJan Höppner 24918fd57520SJan Höppner start_priv->count++; 24928fd57520SJan Höppner 24938fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 24948fd57520SJan Höppner if (IS_ERR(itcw)) { 24958fd57520SJan Höppner rc = -EINVAL; 24968fd57520SJan Höppner goto out_err; 24978fd57520SJan Höppner } 24988fd57520SJan Höppner 24998fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 25008fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 25018fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 25028fd57520SJan Höppner sizeof(struct eckd_count), 25038fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 25048fd57520SJan Höppner if (rc) 25058fd57520SJan Höppner goto out_err; 25068fd57520SJan Höppner 25078fd57520SJan Höppner for (i = 0; i < count; i++) { 25088fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 25098fd57520SJan Höppner sizeof(struct eckd_count)); 25108fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 25118fd57520SJan Höppner rc = -EINVAL; 25128fd57520SJan Höppner goto out_err; 25138fd57520SJan Höppner } 25148fd57520SJan Höppner } 25158fd57520SJan Höppner 25168fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 25178fd57520SJan Höppner itcw_finalize(itcw); 25188fd57520SJan Höppner 25198fd57520SJan Höppner cqr->cpmode = 1; 25208fd57520SJan Höppner cqr->startdev = startdev; 25218fd57520SJan Höppner cqr->memdev = startdev; 25228fd57520SJan Höppner cqr->basedev = base; 25238fd57520SJan Höppner cqr->retries = startdev->default_retries; 25248fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 25258fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 25268fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 25278fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 25288fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 25298fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 25308fd57520SJan Höppner 25318fd57520SJan Höppner return cqr; 25328fd57520SJan Höppner 25338fd57520SJan Höppner out_err: 25348fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 25358fd57520SJan Höppner 25368fd57520SJan Höppner return ERR_PTR(rc); 25378fd57520SJan Höppner } 25388fd57520SJan Höppner 25398fd57520SJan Höppner /* 25408fd57520SJan Höppner * Build the CCW request for the format check 25418fd57520SJan Höppner */ 25428fd57520SJan Höppner static struct dasd_ccw_req * 25438fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 25448fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 25458fd57520SJan Höppner { 25468fd57520SJan Höppner struct dasd_eckd_private *start_priv; 25478fd57520SJan Höppner struct dasd_eckd_private *base_priv; 25488fd57520SJan Höppner struct dasd_device *startdev = NULL; 25498fd57520SJan Höppner struct dasd_ccw_req *cqr; 25508fd57520SJan Höppner struct ccw1 *ccw; 25518fd57520SJan Höppner void *data; 25528fd57520SJan Höppner int cplength, datasize; 25538fd57520SJan Höppner int use_prefix; 25548fd57520SJan Höppner int count; 25558fd57520SJan Höppner int i; 25568fd57520SJan Höppner 25578fd57520SJan Höppner if (enable_pav) 25588fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 25598fd57520SJan Höppner 25608fd57520SJan Höppner if (!startdev) 25618fd57520SJan Höppner startdev = base; 25628fd57520SJan Höppner 25638fd57520SJan Höppner start_priv = startdev->private; 25648fd57520SJan Höppner base_priv = base->private; 25658fd57520SJan Höppner 25668fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 25678fd57520SJan Höppner 25688fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 25698fd57520SJan Höppner 25708fd57520SJan Höppner if (use_prefix) { 25718fd57520SJan Höppner cplength = 1; 25728fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 25738fd57520SJan Höppner } else { 25748fd57520SJan Höppner cplength = 2; 25758fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 25768fd57520SJan Höppner sizeof(struct LO_eckd_data); 25778fd57520SJan Höppner } 25788fd57520SJan Höppner cplength += count; 25798fd57520SJan Höppner 25805e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 25818fd57520SJan Höppner if (IS_ERR(cqr)) 25828fd57520SJan Höppner return cqr; 25838fd57520SJan Höppner 25848fd57520SJan Höppner start_priv->count++; 25858fd57520SJan Höppner data = cqr->data; 25868fd57520SJan Höppner ccw = cqr->cpaddr; 25878fd57520SJan Höppner 25888fd57520SJan Höppner if (use_prefix) { 25898fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 25908fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 25918fd57520SJan Höppner count, 0, 0); 25928fd57520SJan Höppner } else { 25938fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 259445f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 25958fd57520SJan Höppner 25968fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 25978fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25988fd57520SJan Höppner 25998fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 26008fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 26018fd57520SJan Höppner } 26028fd57520SJan Höppner 26038fd57520SJan Höppner for (i = 0; i < count; i++) { 26048fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 26058fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 26068fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 26078fd57520SJan Höppner ccw->count = 8; 26088fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 26098fd57520SJan Höppner ccw++; 26108fd57520SJan Höppner fmt_buffer++; 26118fd57520SJan Höppner } 26128fd57520SJan Höppner 26138fd57520SJan Höppner cqr->startdev = startdev; 26148fd57520SJan Höppner cqr->memdev = startdev; 26158fd57520SJan Höppner cqr->basedev = base; 26168fd57520SJan Höppner cqr->retries = DASD_RETRIES; 26178fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 26188fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 26198fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 26208fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 26218fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 26228fd57520SJan Höppner 26238fd57520SJan Höppner return cqr; 26248fd57520SJan Höppner } 26258fd57520SJan Höppner 26261da177e4SLinus Torvalds static struct dasd_ccw_req * 26275e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 26285e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 26291da177e4SLinus Torvalds { 2630d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2631d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 26321da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 26331da177e4SLinus Torvalds struct eckd_count *ect; 2634d42e1712SStefan Haberland struct ch_t address; 26351da177e4SLinus Torvalds struct ccw1 *ccw; 26361da177e4SLinus Torvalds void *data; 2637b44b0ab3SStefan Weinhuber int rpt; 26381da177e4SLinus Torvalds int cplength, datasize; 2639d42e1712SStefan Haberland int i, j; 2640f9a28f7bSJean-Baptiste Joret int intensity = 0; 2641f9a28f7bSJean-Baptiste Joret int r0_perm; 2642d42e1712SStefan Haberland int nr_tracks; 264318d6624eSStefan Haberland int use_prefix; 26441da177e4SLinus Torvalds 2645a94fa154SStefan Haberland if (enable_pav) 2646d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 264729b8dd9dSStefan Haberland 2648d42e1712SStefan Haberland if (!startdev) 2649d42e1712SStefan Haberland startdev = base; 26501da177e4SLinus Torvalds 2651543691a4SSebastian Ott start_priv = startdev->private; 2652543691a4SSebastian Ott base_priv = base->private; 2653d42e1712SStefan Haberland 2654d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2655d42e1712SStefan Haberland 2656d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 26571da177e4SLinus Torvalds 26581da177e4SLinus Torvalds /* 26591da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 26601da177e4SLinus Torvalds * Bit 0: write record zero 26611da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 26621da177e4SLinus Torvalds * Bit 2: invalidate tracks 26631da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2664f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 26651da177e4SLinus Torvalds * Only some bit combinations do make sense. 26661da177e4SLinus Torvalds */ 2667f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2668f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2669f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2670f9a28f7bSJean-Baptiste Joret } else { 2671f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2672f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2673f9a28f7bSJean-Baptiste Joret } 2674d42e1712SStefan Haberland 267518d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 267618d6624eSStefan Haberland 2677f9a28f7bSJean-Baptiste Joret switch (intensity) { 26781da177e4SLinus Torvalds case 0x00: /* Normal format */ 26791da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2680d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 268118d6624eSStefan Haberland if (use_prefix) 2682d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26831da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2684d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 268518d6624eSStefan Haberland else 268618d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 268718d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 268818d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26891da177e4SLinus Torvalds break; 26901da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 26911da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2692d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 269318d6624eSStefan Haberland if (use_prefix) 2694d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26951da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26961da177e4SLinus Torvalds sizeof(struct eckd_count) + 2697d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 269818d6624eSStefan Haberland else 269918d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 270018d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 270118d6624eSStefan Haberland sizeof(struct eckd_count) + 270218d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 27031da177e4SLinus Torvalds break; 27041da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 27051da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 27061da177e4SLinus Torvalds cplength = 3; 270718d6624eSStefan Haberland if (use_prefix) 2708d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 27091da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 27101da177e4SLinus Torvalds sizeof(struct eckd_count); 271118d6624eSStefan Haberland else 271218d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 271318d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 271418d6624eSStefan Haberland sizeof(struct eckd_count); 27151da177e4SLinus Torvalds break; 27161da177e4SLinus Torvalds default: 2717d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2718d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2719d42e1712SStefan Haberland fdata->intensity); 27201da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 27211da177e4SLinus Torvalds } 27225e2b17e7SJan Höppner 27235e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 27241da177e4SLinus Torvalds if (IS_ERR(fcp)) 27251da177e4SLinus Torvalds return fcp; 27261da177e4SLinus Torvalds 2727d42e1712SStefan Haberland start_priv->count++; 27281da177e4SLinus Torvalds data = fcp->data; 27291da177e4SLinus Torvalds ccw = fcp->cpaddr; 27301da177e4SLinus Torvalds 2731f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 27321da177e4SLinus Torvalds case 0x00: /* Normal format. */ 273318d6624eSStefan Haberland if (use_prefix) { 2734d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2735d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2736d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2737f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2738f9a28f7bSJean-Baptiste Joret if (r0_perm) 2739d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2740d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2741d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 274218d6624eSStefan Haberland } else { 274318d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 274418d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 274545f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 274618d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 274718d6624eSStefan Haberland if (r0_perm) 274818d6624eSStefan Haberland ((struct DE_eckd_data *) data) 274918d6624eSStefan Haberland ->ga_extended |= 0x04; 275018d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 275118d6624eSStefan Haberland } 27521da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27531da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2754d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2755d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 27561da177e4SLinus Torvalds fdata->blksize); 27571da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27581da177e4SLinus Torvalds break; 27591da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 276018d6624eSStefan Haberland if (use_prefix) { 2761d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2762d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 27631da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2764d42e1712SStefan Haberland base, startdev); 2765d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 276618d6624eSStefan Haberland } else { 276718d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 276818d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 276945f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 277018d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 277118d6624eSStefan Haberland } 27721da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27731da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2774d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2775d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2776d42e1712SStefan Haberland base->block->bp_block); 27771da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27781da177e4SLinus Torvalds break; 27791da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 278018d6624eSStefan Haberland if (use_prefix) { 2781d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2782d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2783d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2784d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 278518d6624eSStefan Haberland } else { 278618d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 278718d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 278845f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 278918d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 279018d6624eSStefan Haberland } 27911da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27921da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 27931da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2794d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 27951da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27961da177e4SLinus Torvalds break; 27971da177e4SLinus Torvalds } 2798d42e1712SStefan Haberland 2799d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2800d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2801d42e1712SStefan Haberland set_ch_t(&address, 2802d42e1712SStefan Haberland (fdata->start_unit + j) / 2803d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2804d42e1712SStefan Haberland (fdata->start_unit + j) % 2805d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2806f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 28071da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28081da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2809b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2810b44b0ab3SStefan Weinhuber ect->head = address.head; 28111da177e4SLinus Torvalds ect->record = 0; 28121da177e4SLinus Torvalds ect->kl = 0; 28131da177e4SLinus Torvalds ect->dl = 8; 28141da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28151da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 28161da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28171da177e4SLinus Torvalds ccw->count = 8; 28181da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28191da177e4SLinus Torvalds ccw++; 28201da177e4SLinus Torvalds } 2821f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 28221da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28231da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2824b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2825b44b0ab3SStefan Weinhuber ect->head = address.head; 28261da177e4SLinus Torvalds ect->record = 1; 28271da177e4SLinus Torvalds ect->kl = 0; 28281da177e4SLinus Torvalds ect->dl = 0; 28291da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 28301da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 28311da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28321da177e4SLinus Torvalds ccw->count = 8; 28331da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28341da177e4SLinus Torvalds } else { /* write remaining records */ 28351da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 28361da177e4SLinus Torvalds ect = (struct eckd_count *) data; 28371da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2838b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2839b44b0ab3SStefan Weinhuber ect->head = address.head; 28401da177e4SLinus Torvalds ect->record = i + 1; 28411da177e4SLinus Torvalds ect->kl = 0; 28421da177e4SLinus Torvalds ect->dl = fdata->blksize; 2843d42e1712SStefan Haberland /* 2844d42e1712SStefan Haberland * Check for special tracks 0-1 2845d42e1712SStefan Haberland * when formatting CDL 2846d42e1712SStefan Haberland */ 2847f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 284846d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 28491da177e4SLinus Torvalds if (i < 3) { 28501da177e4SLinus Torvalds ect->kl = 4; 28511da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 28521da177e4SLinus Torvalds } 28531da177e4SLinus Torvalds } 2854f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 285546d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 28561da177e4SLinus Torvalds ect->kl = 44; 28571da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 28581da177e4SLinus Torvalds } 28591da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2860d42e1712SStefan Haberland if (i != 0 || j == 0) 2861d42e1712SStefan Haberland ccw->cmd_code = 2862d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2863d42e1712SStefan Haberland else 2864d42e1712SStefan Haberland ccw->cmd_code = 2865d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 28661da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 28671da177e4SLinus Torvalds ccw->count = 8; 28681da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 28691da177e4SLinus Torvalds ccw++; 28701da177e4SLinus Torvalds } 28711da177e4SLinus Torvalds } 2872d42e1712SStefan Haberland } 2873d42e1712SStefan Haberland 2874d42e1712SStefan Haberland fcp->startdev = startdev; 2875d42e1712SStefan Haberland fcp->memdev = startdev; 287629b8dd9dSStefan Haberland fcp->basedev = base; 2877eb6e199bSStefan Weinhuber fcp->retries = 256; 2878d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 28791aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 28801da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2881d42e1712SStefan Haberland 28821da177e4SLinus Torvalds return fcp; 28831da177e4SLinus Torvalds } 28841da177e4SLinus Torvalds 2885570d237cSJan Höppner /* 2886570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2887570d237cSJan Höppner */ 2888570d237cSJan Höppner static struct dasd_ccw_req * 2889570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 28908fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 28918fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2892d42e1712SStefan Haberland { 28938fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 28948fd57520SJan Höppner 28958fd57520SJan Höppner if (!fmt_buffer) { 28965e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 28978fd57520SJan Höppner } else { 28988fd57520SJan Höppner if (tpm) 28998fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 29008fd57520SJan Höppner enable_pav, 29018fd57520SJan Höppner fmt_buffer, rpt); 29028fd57520SJan Höppner else 29038fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 29048fd57520SJan Höppner fmt_buffer, rpt); 29058fd57520SJan Höppner } 29068fd57520SJan Höppner 29078fd57520SJan Höppner return ccw_req; 2908570d237cSJan Höppner } 2909570d237cSJan Höppner 2910570d237cSJan Höppner /* 2911570d237cSJan Höppner * Sanity checks on format_data 2912570d237cSJan Höppner */ 2913570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2914570d237cSJan Höppner struct format_data_t *fdata) 2915570d237cSJan Höppner { 2916543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2917d42e1712SStefan Haberland 2918d42e1712SStefan Haberland if (fdata->start_unit >= 2919d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2920d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2921d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2922d42e1712SStefan Haberland fdata->start_unit); 2923d42e1712SStefan Haberland return -EINVAL; 2924d42e1712SStefan Haberland } 2925d42e1712SStefan Haberland if (fdata->stop_unit >= 2926d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2927d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2928d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2929d42e1712SStefan Haberland fdata->stop_unit); 2930d42e1712SStefan Haberland return -EINVAL; 2931d42e1712SStefan Haberland } 2932d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2933d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2934d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2935d42e1712SStefan Haberland fdata->start_unit); 2936d42e1712SStefan Haberland return -EINVAL; 2937d42e1712SStefan Haberland } 2938d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2939d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2940d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2941d42e1712SStefan Haberland fdata->blksize); 2942d42e1712SStefan Haberland return -EINVAL; 2943d42e1712SStefan Haberland } 2944570d237cSJan Höppner return 0; 2945570d237cSJan Höppner } 2946570d237cSJan Höppner 2947570d237cSJan Höppner /* 2948570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2949570d237cSJan Höppner */ 2950570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2951570d237cSJan Höppner struct format_data_t *fdata, 29528fd57520SJan Höppner int enable_pav, int tpm, 29538fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 29548fd57520SJan Höppner struct irb *irb) 2955570d237cSJan Höppner { 2956543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2957570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2958570d237cSJan Höppner struct list_head format_queue; 2959570d237cSJan Höppner struct dasd_device *device; 29608fd57520SJan Höppner char *sense = NULL; 2961570d237cSJan Höppner int old_start, old_stop, format_step; 2962570d237cSJan Höppner int step, retry; 2963570d237cSJan Höppner int rc; 2964570d237cSJan Höppner 2965570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2966570d237cSJan Höppner if (rc) 2967570d237cSJan Höppner return rc; 2968d42e1712SStefan Haberland 2969d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2970d42e1712SStefan Haberland 297146d1c03cSJan Höppner old_start = fdata->start_unit; 297229b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2973d42e1712SStefan Haberland 29748fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 29758fd57520SJan Höppner /* Command Mode / Format Check */ 29768fd57520SJan Höppner format_step = 1; 29778fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 29788fd57520SJan Höppner /* Transport Mode / Format Check */ 29798fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 29808fd57520SJan Höppner } else { 29818fd57520SJan Höppner /* Normal Formatting */ 29828fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 29838fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 29848fd57520SJan Höppner } 29858fd57520SJan Höppner 298646d1c03cSJan Höppner do { 298746d1c03cSJan Höppner retry = 0; 2988d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2989d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 299046d1c03cSJan Höppner if (step > format_step) { 299146d1c03cSJan Höppner fdata->stop_unit = 299246d1c03cSJan Höppner fdata->start_unit + format_step - 1; 299346d1c03cSJan Höppner } 2994d42e1712SStefan Haberland 2995570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 29968fd57520SJan Höppner enable_pav, tpm, 29978fd57520SJan Höppner fmt_buffer, rpt); 2998d42e1712SStefan Haberland if (IS_ERR(cqr)) { 299946d1c03cSJan Höppner rc = PTR_ERR(cqr); 300046d1c03cSJan Höppner if (rc == -ENOMEM) { 300146d1c03cSJan Höppner if (list_empty(&format_queue)) 300246d1c03cSJan Höppner goto out; 3003d42e1712SStefan Haberland /* 300446d1c03cSJan Höppner * not enough memory available, start 300546d1c03cSJan Höppner * requests retry after first requests 300646d1c03cSJan Höppner * were finished 3007d42e1712SStefan Haberland */ 300846d1c03cSJan Höppner retry = 1; 300946d1c03cSJan Höppner break; 3010d42e1712SStefan Haberland } 301146d1c03cSJan Höppner goto out_err; 301246d1c03cSJan Höppner } 301346d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 3014d42e1712SStefan Haberland 30158fd57520SJan Höppner if (fmt_buffer) { 30168fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 30178fd57520SJan Höppner fmt_buffer += rpt * step; 30188fd57520SJan Höppner } 3019d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 3020d42e1712SStefan Haberland fdata->stop_unit = old_stop; 3021d42e1712SStefan Haberland } 3022d42e1712SStefan Haberland 302346d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 3024d42e1712SStefan Haberland 302546d1c03cSJan Höppner out_err: 3026d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 3027d42e1712SStefan Haberland device = cqr->startdev; 3028543691a4SSebastian Ott private = device->private; 30298fd57520SJan Höppner 30308fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 30318fd57520SJan Höppner /* 30328fd57520SJan Höppner * Only get sense data if called by format 30338fd57520SJan Höppner * check 30348fd57520SJan Höppner */ 30358fd57520SJan Höppner if (fmt_buffer && irb) { 30368fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 30378fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 30388fd57520SJan Höppner } 3039d42e1712SStefan Haberland rc = -EIO; 30408fd57520SJan Höppner } 3041d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 30425e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 3043d42e1712SStefan Haberland private->count--; 3044d42e1712SStefan Haberland } 3045d42e1712SStefan Haberland 30468fd57520SJan Höppner if (rc && rc != -EIO) 304746d1c03cSJan Höppner goto out; 30488fd57520SJan Höppner if (rc == -EIO) { 30498fd57520SJan Höppner /* 30508fd57520SJan Höppner * In case fewer than the expected records are on the 30518fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 30528fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 30538fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 30548fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 30558fd57520SJan Höppner * and continue. 30568fd57520SJan Höppner */ 30578fd57520SJan Höppner if (sense && 30588fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 30598fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 30608fd57520SJan Höppner retry = 1; 30618fd57520SJan Höppner else 30628fd57520SJan Höppner goto out; 30638fd57520SJan Höppner } 306429b8dd9dSStefan Haberland 306546d1c03cSJan Höppner } while (retry); 306646d1c03cSJan Höppner 306746d1c03cSJan Höppner out: 306846d1c03cSJan Höppner fdata->start_unit = old_start; 306946d1c03cSJan Höppner fdata->stop_unit = old_stop; 3070d42e1712SStefan Haberland 3071d42e1712SStefan Haberland return rc; 3072d42e1712SStefan Haberland } 3073d42e1712SStefan Haberland 3074570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 3075570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 3076570d237cSJan Höppner { 30778fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 30788fd57520SJan Höppner 0, NULL); 30798fd57520SJan Höppner } 30808fd57520SJan Höppner 30815e6bdd37SStefan Haberland static bool test_and_set_format_track(struct dasd_format_entry *to_format, 30825e6bdd37SStefan Haberland struct dasd_block *block) 30835e6bdd37SStefan Haberland { 30845e6bdd37SStefan Haberland struct dasd_format_entry *format; 30855e6bdd37SStefan Haberland unsigned long flags; 30865e6bdd37SStefan Haberland bool rc = false; 30875e6bdd37SStefan Haberland 30885e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 30895e6bdd37SStefan Haberland list_for_each_entry(format, &block->format_list, list) { 30905e6bdd37SStefan Haberland if (format->track == to_format->track) { 30915e6bdd37SStefan Haberland rc = true; 30925e6bdd37SStefan Haberland goto out; 30935e6bdd37SStefan Haberland } 30945e6bdd37SStefan Haberland } 30955e6bdd37SStefan Haberland list_add_tail(&to_format->list, &block->format_list); 30965e6bdd37SStefan Haberland 30975e6bdd37SStefan Haberland out: 30985e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 30995e6bdd37SStefan Haberland return rc; 31005e6bdd37SStefan Haberland } 31015e6bdd37SStefan Haberland 31025e6bdd37SStefan Haberland static void clear_format_track(struct dasd_format_entry *format, 31035e6bdd37SStefan Haberland struct dasd_block *block) 31045e6bdd37SStefan Haberland { 31055e6bdd37SStefan Haberland unsigned long flags; 31065e6bdd37SStefan Haberland 31075e6bdd37SStefan Haberland spin_lock_irqsave(&block->format_lock, flags); 31085e6bdd37SStefan Haberland list_del_init(&format->list); 31095e6bdd37SStefan Haberland spin_unlock_irqrestore(&block->format_lock, flags); 31105e6bdd37SStefan Haberland } 31115e6bdd37SStefan Haberland 31128fd57520SJan Höppner /* 31135e2b17e7SJan Höppner * Callback function to free ESE format requests. 31145e2b17e7SJan Höppner */ 31155e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 31165e2b17e7SJan Höppner { 31175e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 31185e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 31195e6bdd37SStefan Haberland struct dasd_format_entry *format = data; 31205e2b17e7SJan Höppner 31215e6bdd37SStefan Haberland clear_format_track(format, cqr->basedev->block); 31225e2b17e7SJan Höppner private->count--; 31235e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 31245e2b17e7SJan Höppner } 31255e2b17e7SJan Höppner 31265e2b17e7SJan Höppner static struct dasd_ccw_req * 31275e6bdd37SStefan Haberland dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, 31285e6bdd37SStefan Haberland struct irb *irb) 31295e2b17e7SJan Höppner { 31305e2b17e7SJan Höppner struct dasd_eckd_private *private; 31315e6bdd37SStefan Haberland struct dasd_format_entry *format; 31325e2b17e7SJan Höppner struct format_data_t fdata; 31335e2b17e7SJan Höppner unsigned int recs_per_trk; 31345e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 31355e2b17e7SJan Höppner struct dasd_device *base; 31365e2b17e7SJan Höppner struct dasd_block *block; 31375e2b17e7SJan Höppner unsigned int blksize; 31385e2b17e7SJan Höppner struct request *req; 31395e2b17e7SJan Höppner sector_t first_trk; 31405e2b17e7SJan Höppner sector_t last_trk; 31415e6bdd37SStefan Haberland sector_t curr_trk; 31425e2b17e7SJan Höppner int rc; 31435e2b17e7SJan Höppner 31445e2b17e7SJan Höppner req = cqr->callback_data; 31455e6bdd37SStefan Haberland block = cqr->block; 31465e6bdd37SStefan Haberland base = block->base; 31475e2b17e7SJan Höppner private = base->private; 31485e2b17e7SJan Höppner blksize = block->bp_block; 31495e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 31505e6bdd37SStefan Haberland format = &startdev->format_entry; 31515e2b17e7SJan Höppner 31525e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 31535e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 31545e2b17e7SJan Höppner last_trk = 31555e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 31565e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 31575e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 31585e6bdd37SStefan Haberland if (rc) 31595e6bdd37SStefan Haberland return ERR_PTR(rc); 31605e2b17e7SJan Höppner 31615e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 31625e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, startdev, 31635e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 31645e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 31655e6bdd37SStefan Haberland return ERR_PTR(-EINVAL); 31665e6bdd37SStefan Haberland } 31675e6bdd37SStefan Haberland format->track = curr_trk; 31685e6bdd37SStefan Haberland /* test if track is already in formatting by another thread */ 31695e6bdd37SStefan Haberland if (test_and_set_format_track(format, block)) 31705e6bdd37SStefan Haberland return ERR_PTR(-EEXIST); 31715e6bdd37SStefan Haberland 31725e6bdd37SStefan Haberland fdata.start_unit = curr_trk; 31735e6bdd37SStefan Haberland fdata.stop_unit = curr_trk; 31745e2b17e7SJan Höppner fdata.blksize = blksize; 31755e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 31765e2b17e7SJan Höppner 31775e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 31785e2b17e7SJan Höppner if (rc) 31795e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 31805e2b17e7SJan Höppner 31815e2b17e7SJan Höppner /* 31825e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 31835e2b17e7SJan Höppner * the former startdev. 31845e2b17e7SJan Höppner */ 31855e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 31865e2b17e7SJan Höppner if (IS_ERR(fcqr)) 31875e2b17e7SJan Höppner return fcqr; 31885e2b17e7SJan Höppner 31895e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 31905e6bdd37SStefan Haberland fcqr->callback_data = (void *) format; 31915e2b17e7SJan Höppner 31925e2b17e7SJan Höppner return fcqr; 31935e2b17e7SJan Höppner } 31945e2b17e7SJan Höppner 31955e2b17e7SJan Höppner /* 31965e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 31975e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 31985e6bdd37SStefan Haberland * 31995e6bdd37SStefan Haberland * The first unformatted track is the one that got the NRF error, the address is 32005e6bdd37SStefan Haberland * encoded in the sense data. 32015e6bdd37SStefan Haberland * 32025e6bdd37SStefan Haberland * All tracks before have returned valid data and should not be touched. 32035e6bdd37SStefan Haberland * All tracks after the unformatted track might be formatted or not. This is 32045e6bdd37SStefan Haberland * currently not known, remember the processed data and return the remainder of 32055e6bdd37SStefan Haberland * the request to the blocklayer in __dasd_cleanup_cqr(). 32065e2b17e7SJan Höppner */ 32075e6bdd37SStefan Haberland static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) 32085e2b17e7SJan Höppner { 32095e6bdd37SStefan Haberland struct dasd_eckd_private *private; 32105e6bdd37SStefan Haberland sector_t first_trk, last_trk; 32115e6bdd37SStefan Haberland sector_t first_blk, last_blk; 32125e2b17e7SJan Höppner unsigned int blksize, off; 32135e6bdd37SStefan Haberland unsigned int recs_per_trk; 32145e2b17e7SJan Höppner struct dasd_device *base; 32155e2b17e7SJan Höppner struct req_iterator iter; 32165e6bdd37SStefan Haberland struct dasd_block *block; 32175e6bdd37SStefan Haberland unsigned int skip_block; 32185e6bdd37SStefan Haberland unsigned int blk_count; 32195e2b17e7SJan Höppner struct request *req; 32205e2b17e7SJan Höppner struct bio_vec bv; 32215e6bdd37SStefan Haberland sector_t curr_trk; 32225e6bdd37SStefan Haberland sector_t end_blk; 32235e2b17e7SJan Höppner char *dst; 32245e6bdd37SStefan Haberland int rc; 32255e2b17e7SJan Höppner 32265e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 32275e2b17e7SJan Höppner base = cqr->block->base; 32285e2b17e7SJan Höppner blksize = base->block->bp_block; 32295e6bdd37SStefan Haberland block = cqr->block; 32305e6bdd37SStefan Haberland private = base->private; 32315e6bdd37SStefan Haberland skip_block = 0; 32325e6bdd37SStefan Haberland blk_count = 0; 32335e6bdd37SStefan Haberland 32345e6bdd37SStefan Haberland recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32355e6bdd37SStefan Haberland first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; 32365e6bdd37SStefan Haberland sector_div(first_trk, recs_per_trk); 32375e6bdd37SStefan Haberland last_trk = last_blk = 32385e6bdd37SStefan Haberland (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 32395e6bdd37SStefan Haberland sector_div(last_trk, recs_per_trk); 32405e6bdd37SStefan Haberland rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); 32415e6bdd37SStefan Haberland if (rc) 32425e6bdd37SStefan Haberland return rc; 32435e6bdd37SStefan Haberland 32445e6bdd37SStefan Haberland /* sanity check if the current track from sense data is valid */ 32455e6bdd37SStefan Haberland if (curr_trk < first_trk || curr_trk > last_trk) { 32465e6bdd37SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, base, 32475e6bdd37SStefan Haberland "ESE error track %llu not within range %llu - %llu\n", 32485e6bdd37SStefan Haberland curr_trk, first_trk, last_trk); 32495e6bdd37SStefan Haberland return -EINVAL; 32505e6bdd37SStefan Haberland } 32515e6bdd37SStefan Haberland 32525e6bdd37SStefan Haberland /* 32535e6bdd37SStefan Haberland * if not the first track got the NRF error we have to skip over valid 32545e6bdd37SStefan Haberland * blocks 32555e6bdd37SStefan Haberland */ 32565e6bdd37SStefan Haberland if (curr_trk != first_trk) 32575e6bdd37SStefan Haberland skip_block = curr_trk * recs_per_trk - first_blk; 32585e6bdd37SStefan Haberland 32595e6bdd37SStefan Haberland /* we have no information beyond the current track */ 32605e6bdd37SStefan Haberland end_blk = (curr_trk + 1) * recs_per_trk; 32615e2b17e7SJan Höppner 32625e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 32635e2b17e7SJan Höppner dst = page_address(bv.bv_page) + bv.bv_offset; 32645e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 32655e6bdd37SStefan Haberland if (first_blk + blk_count >= end_blk) { 32665e6bdd37SStefan Haberland cqr->proc_bytes = blk_count * blksize; 32675e6bdd37SStefan Haberland return 0; 32685e6bdd37SStefan Haberland } 32695e6bdd37SStefan Haberland if (dst && !skip_block) { 32705e2b17e7SJan Höppner dst += off; 32715e2b17e7SJan Höppner memset(dst, 0, blksize); 32725e6bdd37SStefan Haberland } else { 32735e6bdd37SStefan Haberland skip_block--; 32745e6bdd37SStefan Haberland } 32755e6bdd37SStefan Haberland blk_count++; 32765e2b17e7SJan Höppner } 32775e2b17e7SJan Höppner } 32785e6bdd37SStefan Haberland return 0; 32795e2b17e7SJan Höppner } 32805e2b17e7SJan Höppner 32815e2b17e7SJan Höppner /* 32828fd57520SJan Höppner * Helper function to count consecutive records of a single track. 32838fd57520SJan Höppner */ 32848fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 32858fd57520SJan Höppner int max) 32868fd57520SJan Höppner { 32878fd57520SJan Höppner int head; 32888fd57520SJan Höppner int i; 32898fd57520SJan Höppner 32908fd57520SJan Höppner head = fmt_buffer[start].head; 32918fd57520SJan Höppner 32928fd57520SJan Höppner /* 32938fd57520SJan Höppner * There are 3 conditions where we stop counting: 32948fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 32958fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 32968fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 32978fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 32988fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 32998fd57520SJan Höppner * record will be 0 then) 33008fd57520SJan Höppner */ 33018fd57520SJan Höppner for (i = start; i < max; i++) { 33028fd57520SJan Höppner if (i > start) { 33038fd57520SJan Höppner if ((fmt_buffer[i].head == head && 33048fd57520SJan Höppner fmt_buffer[i].record == 1) || 33058fd57520SJan Höppner fmt_buffer[i].head != head || 33068fd57520SJan Höppner fmt_buffer[i].record == 0) 33078fd57520SJan Höppner break; 33088fd57520SJan Höppner } 33098fd57520SJan Höppner } 33108fd57520SJan Höppner 33118fd57520SJan Höppner return i - start; 33128fd57520SJan Höppner } 33138fd57520SJan Höppner 33148fd57520SJan Höppner /* 33158fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 33168fd57520SJan Höppner * record ids, and key length are compared with expected data. 33178fd57520SJan Höppner * 33188fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 33198fd57520SJan Höppner * additional information, depending on the error. 33208fd57520SJan Höppner */ 33218fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 33228fd57520SJan Höppner struct format_check_t *cdata, 33238fd57520SJan Höppner int rpt_max, int rpt_exp, 33248fd57520SJan Höppner int trk_per_cyl, int tpm) 33258fd57520SJan Höppner { 33268fd57520SJan Höppner struct ch_t geo; 33278fd57520SJan Höppner int max_entries; 33288fd57520SJan Höppner int count = 0; 33298fd57520SJan Höppner int trkcount; 33308fd57520SJan Höppner int blksize; 33318fd57520SJan Höppner int pos = 0; 33328fd57520SJan Höppner int i, j; 33338fd57520SJan Höppner int kl; 33348fd57520SJan Höppner 33358fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 33368fd57520SJan Höppner max_entries = trkcount * rpt_max; 33378fd57520SJan Höppner 33388fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 33398fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 33408fd57520SJan Höppner if (tpm) { 33418fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 33428fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 33438fd57520SJan Höppner if (pos++ > max_entries) 33448fd57520SJan Höppner break; 33458fd57520SJan Höppner } 33468fd57520SJan Höppner } else { 33478fd57520SJan Höppner if (i != cdata->expect.start_unit) 33488fd57520SJan Höppner pos += rpt_max - count; 33498fd57520SJan Höppner } 33508fd57520SJan Höppner 33518fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 33528fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 33538fd57520SJan Höppner 33548fd57520SJan Höppner /* Count and check number of records */ 33558fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 33568fd57520SJan Höppner 33578fd57520SJan Höppner if (count < rpt_exp) { 33588fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 33598fd57520SJan Höppner break; 33608fd57520SJan Höppner } 33618fd57520SJan Höppner if (count > rpt_exp) { 33628fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 33638fd57520SJan Höppner break; 33648fd57520SJan Höppner } 33658fd57520SJan Höppner 33668fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 33678fd57520SJan Höppner blksize = cdata->expect.blksize; 33688fd57520SJan Höppner kl = 0; 33698fd57520SJan Höppner 33708fd57520SJan Höppner /* 33718fd57520SJan Höppner * Set special values when checking CDL formatted 33728fd57520SJan Höppner * devices. 33738fd57520SJan Höppner */ 33748fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 33758fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 33768fd57520SJan Höppner if (j < 3) { 33778fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 33788fd57520SJan Höppner kl = 4; 33798fd57520SJan Höppner } 33808fd57520SJan Höppner } 33818fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 33828fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 33838fd57520SJan Höppner blksize = LABEL_SIZE - 44; 33848fd57520SJan Höppner kl = 44; 33858fd57520SJan Höppner } 33868fd57520SJan Höppner 33878fd57520SJan Höppner /* Check blocksize */ 33888fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 33898fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 33908fd57520SJan Höppner goto out; 33918fd57520SJan Höppner } 33928fd57520SJan Höppner /* Check if key length is 0 */ 33938fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 33948fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 33958fd57520SJan Höppner goto out; 33968fd57520SJan Höppner } 33978fd57520SJan Höppner /* Check if record_id is correct */ 33988fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 33998fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 34008fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 34018fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 34028fd57520SJan Höppner goto out; 34038fd57520SJan Höppner } 34048fd57520SJan Höppner } 34058fd57520SJan Höppner } 34068fd57520SJan Höppner 34078fd57520SJan Höppner out: 34088fd57520SJan Höppner /* 34098fd57520SJan Höppner * In case of no errors, we need to decrease by one 34108fd57520SJan Höppner * to get the correct positions. 34118fd57520SJan Höppner */ 34128fd57520SJan Höppner if (!cdata->result) { 34138fd57520SJan Höppner i--; 34148fd57520SJan Höppner pos--; 34158fd57520SJan Höppner } 34168fd57520SJan Höppner 34178fd57520SJan Höppner cdata->unit = i; 34188fd57520SJan Höppner cdata->num_records = count; 34198fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 34208fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 34218fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 34228fd57520SJan Höppner } 34238fd57520SJan Höppner 34248fd57520SJan Höppner /* 34258fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 34268fd57520SJan Höppner */ 34278fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 34288fd57520SJan Höppner struct format_check_t *cdata, 34298fd57520SJan Höppner int enable_pav) 34308fd57520SJan Höppner { 34318fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 34328fd57520SJan Höppner struct eckd_count *fmt_buffer; 34338fd57520SJan Höppner struct irb irb; 34348fd57520SJan Höppner int rpt_max, rpt_exp; 34358fd57520SJan Höppner int fmt_buffer_size; 34368fd57520SJan Höppner int trk_per_cyl; 34378fd57520SJan Höppner int trkcount; 34388fd57520SJan Höppner int tpm = 0; 34398fd57520SJan Höppner int rc; 34408fd57520SJan Höppner 34418fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 34428fd57520SJan Höppner 34438fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 34448fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 34458fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 34468fd57520SJan Höppner 34478fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 34488fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 34498fd57520SJan Höppner 34508fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 34518fd57520SJan Höppner if (!fmt_buffer) 34528fd57520SJan Höppner return -ENOMEM; 34538fd57520SJan Höppner 34548fd57520SJan Höppner /* 34558fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 34568fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 34578fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 34588fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 34598fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 34608fd57520SJan Höppner * processed using command mode. 34618fd57520SJan Höppner */ 34628fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 34638fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 34648fd57520SJan Höppner tpm = 1; 34658fd57520SJan Höppner 34668fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 34678fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 34688fd57520SJan Höppner if (rc && rc != -EIO) 34698fd57520SJan Höppner goto out; 34708fd57520SJan Höppner if (rc == -EIO) { 34718fd57520SJan Höppner /* 34728fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 34738fd57520SJan Höppner * with an incorrect length error, we're going to retry the 34748fd57520SJan Höppner * check with command mode. 34758fd57520SJan Höppner */ 34768fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 34778fd57520SJan Höppner tpm = 0; 34788fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 34798fd57520SJan Höppner enable_pav, tpm, 34808fd57520SJan Höppner fmt_buffer, rpt_max, 34818fd57520SJan Höppner &irb); 34828fd57520SJan Höppner if (rc) 34838fd57520SJan Höppner goto out; 34848fd57520SJan Höppner } else { 34858fd57520SJan Höppner goto out; 34868fd57520SJan Höppner } 34878fd57520SJan Höppner } 34888fd57520SJan Höppner 34898fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 34908fd57520SJan Höppner trk_per_cyl, tpm); 34918fd57520SJan Höppner 34928fd57520SJan Höppner out: 34938fd57520SJan Höppner kfree(fmt_buffer); 34948fd57520SJan Höppner 34958fd57520SJan Höppner return rc; 3496570d237cSJan Höppner } 3497570d237cSJan Höppner 34988e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 34991da177e4SLinus Torvalds { 3500a2ace466SHannes Reinecke if (cqr->retries < 0) { 3501a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3502a2ace466SHannes Reinecke return; 3503a2ace466SHannes Reinecke } 35048e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 35058e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 35068e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 35078e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3508c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 35091da177e4SLinus Torvalds } 35108e09f215SStefan Weinhuber }; 35111da177e4SLinus Torvalds 35121da177e4SLinus Torvalds static dasd_erp_fn_t 35131da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 35141da177e4SLinus Torvalds { 35158e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 35161da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 35171da177e4SLinus Torvalds 35181da177e4SLinus Torvalds switch (cdev->id.cu_type) { 35191da177e4SLinus Torvalds case 0x3990: 35201da177e4SLinus Torvalds case 0x2105: 35211da177e4SLinus Torvalds case 0x2107: 35221da177e4SLinus Torvalds case 0x1750: 35231da177e4SLinus Torvalds return dasd_3990_erp_action; 35241da177e4SLinus Torvalds case 0x9343: 35251da177e4SLinus Torvalds case 0x3880: 35261da177e4SLinus Torvalds default: 35271da177e4SLinus Torvalds return dasd_default_erp_action; 35281da177e4SLinus Torvalds } 35291da177e4SLinus Torvalds } 35301da177e4SLinus Torvalds 35311da177e4SLinus Torvalds static dasd_erp_fn_t 35321da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 35331da177e4SLinus Torvalds { 35341da177e4SLinus Torvalds return dasd_default_erp_postaction; 35351da177e4SLinus Torvalds } 35361da177e4SLinus Torvalds 35375a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 35385a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 35398e09f215SStefan Weinhuber struct irb *irb) 35408e09f215SStefan Weinhuber { 35418e09f215SStefan Weinhuber char mask; 3542f3eb5384SStefan Weinhuber char *sense = NULL; 3543543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 35448e09f215SStefan Weinhuber 35458e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 35468e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3547f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3548c8d1c0ffSStefan Haberland /* 3549c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3550c8d1c0ffSStefan Haberland * and only if not suspended 3551c8d1c0ffSStefan Haberland */ 3552501183f2SStefan Haberland if (!device->block && private->lcu && 355325e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3554c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3555c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3556501183f2SStefan Haberland /* schedule worker to reload device */ 3557501183f2SStefan Haberland dasd_reload_device(device); 3558501183f2SStefan Haberland } 35598e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 35608e09f215SStefan Weinhuber return; 35618e09f215SStefan Weinhuber } 35628e09f215SStefan Weinhuber 3563a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 35645a27e60dSStefan Weinhuber if (!sense) 35655a27e60dSStefan Weinhuber return; 35665a27e60dSStefan Weinhuber 35675a27e60dSStefan Weinhuber /* summary unit check */ 3568c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3569a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 357059a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 357159a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 357259a9ed5fSStefan Haberland "eckd suc: device already notified"); 357359a9ed5fSStefan Haberland return; 357459a9ed5fSStefan Haberland } 357559a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 357659a9ed5fSStefan Haberland if (!sense) { 357759a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 357859a9ed5fSStefan Haberland "eckd suc: no reason code available"); 357959a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 358059a9ed5fSStefan Haberland return; 358159a9ed5fSStefan Haberland 358259a9ed5fSStefan Haberland } 358359a9ed5fSStefan Haberland private->suc_reason = sense[8]; 358459a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 358559a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 358659a9ed5fSStefan Haberland private->suc_reason); 358759a9ed5fSStefan Haberland dasd_get_device(device); 358859a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 358959a9ed5fSStefan Haberland dasd_put_device(device); 359059a9ed5fSStefan Haberland 35918e09f215SStefan Weinhuber return; 35928e09f215SStefan Weinhuber } 35938e09f215SStefan Weinhuber 3594f60c768cSStefan Haberland /* service information message SIM */ 35955a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3596f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3597f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3598f60c768cSStefan Haberland return; 3599f60c768cSStefan Haberland } 3600f60c768cSStefan Haberland 36015a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 36025a27e60dSStefan Weinhuber * as alias devices may be used with several bases 36035a27e60dSStefan Weinhuber */ 3604c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3605c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 36065a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 36075a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 36085a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 36095a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 36105a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36115a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 36125a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3613ada3df91SStefan Haberland } 36145a27e60dSStefan Weinhuber } 3615f3eb5384SStefan Weinhuber 361691dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 361791dc4a19SJan Höppner unsigned int first_trk, 361891dc4a19SJan Höppner unsigned int last_trk) 361991dc4a19SJan Höppner { 362091dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 362191dc4a19SJan Höppner unsigned int trks_per_vol; 362291dc4a19SJan Höppner int rc = 0; 362391dc4a19SJan Höppner 362491dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 362591dc4a19SJan Höppner 362691dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 362791dc4a19SJan Höppner dev_warn(&device->cdev->dev, 362891dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 362991dc4a19SJan Höppner first_trk); 363091dc4a19SJan Höppner rc = -EINVAL; 363191dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 363291dc4a19SJan Höppner dev_warn(&device->cdev->dev, 363391dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 363491dc4a19SJan Höppner last_trk); 363591dc4a19SJan Höppner rc = -EINVAL; 363691dc4a19SJan Höppner } else if (first_trk > last_trk) { 363791dc4a19SJan Höppner dev_warn(&device->cdev->dev, 363891dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 363991dc4a19SJan Höppner first_trk); 364091dc4a19SJan Höppner rc = -EINVAL; 364191dc4a19SJan Höppner } 364291dc4a19SJan Höppner return rc; 364391dc4a19SJan Höppner } 364491dc4a19SJan Höppner 364591dc4a19SJan Höppner /* 364691dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 364791dc4a19SJan Höppner * with extent alignment in mind. 364891dc4a19SJan Höppner */ 364991dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 365091dc4a19SJan Höppner { 365191dc4a19SJan Höppner int cur_pos = 0; 365291dc4a19SJan Höppner int count = 0; 365391dc4a19SJan Höppner int tmp; 365491dc4a19SJan Höppner 365591dc4a19SJan Höppner if (from == to) 365691dc4a19SJan Höppner return 1; 365791dc4a19SJan Höppner 365891dc4a19SJan Höppner /* Count first partial extent */ 365991dc4a19SJan Höppner if (from % trks_per_ext != 0) { 366091dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 366191dc4a19SJan Höppner if (tmp > to) 366291dc4a19SJan Höppner tmp = to; 366391dc4a19SJan Höppner cur_pos = tmp - from + 1; 366491dc4a19SJan Höppner count++; 366591dc4a19SJan Höppner } 366691dc4a19SJan Höppner /* Count full extents */ 366791dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 366891dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 366991dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 367091dc4a19SJan Höppner cur_pos = tmp; 367191dc4a19SJan Höppner } 367291dc4a19SJan Höppner /* Count last partial extent */ 367391dc4a19SJan Höppner if (cur_pos < to) 367491dc4a19SJan Höppner count++; 367591dc4a19SJan Höppner 367691dc4a19SJan Höppner return count; 367791dc4a19SJan Höppner } 367891dc4a19SJan Höppner 367991dc4a19SJan Höppner /* 368091dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 368191dc4a19SJan Höppner */ 368291dc4a19SJan Höppner static struct dasd_ccw_req * 368391dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 368491dc4a19SJan Höppner struct request *req, unsigned int first_trk, 368591dc4a19SJan Höppner unsigned int last_trk, int by_extent) 368691dc4a19SJan Höppner { 368791dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 368891dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 368991dc4a19SJan Höppner struct dasd_rssd_features *features; 369091dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 369191dc4a19SJan Höppner u16 heads, beg_head, end_head; 369291dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 369391dc4a19SJan Höppner struct dasd_ccw_req *cqr; 369491dc4a19SJan Höppner u32 beg_cyl, end_cyl; 369591dc4a19SJan Höppner struct ccw1 *ccw; 369691dc4a19SJan Höppner int trks_per_ext; 369791dc4a19SJan Höppner size_t ras_size; 369891dc4a19SJan Höppner size_t size; 369991dc4a19SJan Höppner int nr_exts; 370091dc4a19SJan Höppner void *rq; 370191dc4a19SJan Höppner int i; 370291dc4a19SJan Höppner 370391dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 370491dc4a19SJan Höppner return ERR_PTR(-EINVAL); 370591dc4a19SJan Höppner 370691dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 370791dc4a19SJan Höppner 370891dc4a19SJan Höppner features = &private->features; 370991dc4a19SJan Höppner 371091dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 371191dc4a19SJan Höppner nr_exts = 0; 371291dc4a19SJan Höppner if (by_extent) 371391dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 371491dc4a19SJan Höppner ras_size = sizeof(*ras_data); 371591dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 371691dc4a19SJan Höppner 371791dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 371891dc4a19SJan Höppner if (IS_ERR(cqr)) { 371991dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 372091dc4a19SJan Höppner "Could not allocate RAS request"); 372191dc4a19SJan Höppner return cqr; 372291dc4a19SJan Höppner } 372391dc4a19SJan Höppner 372491dc4a19SJan Höppner ras_data = cqr->data; 372591dc4a19SJan Höppner memset(ras_data, 0, size); 372691dc4a19SJan Höppner 372791dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 372891dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 372991dc4a19SJan Höppner /* Release specified extents or entire volume */ 373091dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 373191dc4a19SJan Höppner /* 373291dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 373391dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 373491dc4a19SJan Höppner * subset. 373591dc4a19SJan Höppner */ 373691dc4a19SJan Höppner ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 373791dc4a19SJan Höppner ras_data->lss = private->ned->ID; 373891dc4a19SJan Höppner ras_data->dev_addr = private->ned->unit_addr; 373991dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 374091dc4a19SJan Höppner 374191dc4a19SJan Höppner if (by_extent) { 374291dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 374391dc4a19SJan Höppner cur_from_trk = first_trk; 374491dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 374591dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 374691dc4a19SJan Höppner if (cur_to_trk > last_trk) 374791dc4a19SJan Höppner cur_to_trk = last_trk; 374891dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 374991dc4a19SJan Höppner 375091dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 375191dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 375291dc4a19SJan Höppner beg_head = cur_from_trk % heads; 375391dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 375491dc4a19SJan Höppner end_head = cur_to_trk % heads; 375591dc4a19SJan Höppner 375691dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 375791dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 375891dc4a19SJan Höppner 375991dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 376091dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 376191dc4a19SJan Höppner if (cur_to_trk > last_trk) 376291dc4a19SJan Höppner cur_to_trk = last_trk; 376391dc4a19SJan Höppner ras_range++; 376491dc4a19SJan Höppner } 376591dc4a19SJan Höppner } 376691dc4a19SJan Höppner 376791dc4a19SJan Höppner ccw = cqr->cpaddr; 376891dc4a19SJan Höppner ccw->cda = (__u32)(addr_t)cqr->data; 376991dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 377091dc4a19SJan Höppner ccw->count = size; 377191dc4a19SJan Höppner 377291dc4a19SJan Höppner cqr->startdev = device; 377391dc4a19SJan Höppner cqr->memdev = device; 377491dc4a19SJan Höppner cqr->block = block; 377591dc4a19SJan Höppner cqr->retries = 256; 377691dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 377791dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 377891dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 377991dc4a19SJan Höppner 378091dc4a19SJan Höppner return cqr; 378191dc4a19SJan Höppner } 378291dc4a19SJan Höppner 378391dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 378491dc4a19SJan Höppner { 378591dc4a19SJan Höppner struct dasd_ccw_req *cqr; 378691dc4a19SJan Höppner int rc; 378791dc4a19SJan Höppner 378891dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 378991dc4a19SJan Höppner if (IS_ERR(cqr)) 379091dc4a19SJan Höppner return PTR_ERR(cqr); 379191dc4a19SJan Höppner 379291dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 379391dc4a19SJan Höppner 379491dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 379591dc4a19SJan Höppner 379691dc4a19SJan Höppner return rc; 379791dc4a19SJan Höppner } 379891dc4a19SJan Höppner 379991dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 380091dc4a19SJan Höppner unsigned int from, unsigned int to) 380191dc4a19SJan Höppner { 380291dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 380391dc4a19SJan Höppner struct dasd_block *block = device->block; 380491dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 380591dc4a19SJan Höppner struct list_head ras_queue; 380691dc4a19SJan Höppner unsigned int device_exts; 380791dc4a19SJan Höppner int trks_per_ext; 380891dc4a19SJan Höppner int stop, step; 380991dc4a19SJan Höppner int cur_pos; 381091dc4a19SJan Höppner int rc = 0; 381191dc4a19SJan Höppner int retry; 381291dc4a19SJan Höppner 381391dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 381491dc4a19SJan Höppner 381591dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 381691dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 381791dc4a19SJan Höppner 381891dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 381991dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 382091dc4a19SJan Höppner cur_pos = from; 382191dc4a19SJan Höppner 382291dc4a19SJan Höppner do { 382391dc4a19SJan Höppner retry = 0; 382491dc4a19SJan Höppner while (cur_pos < to) { 382591dc4a19SJan Höppner stop = cur_pos + step - 382691dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 382791dc4a19SJan Höppner if (stop > to) 382891dc4a19SJan Höppner stop = to; 382991dc4a19SJan Höppner 383091dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 383191dc4a19SJan Höppner if (IS_ERR(cqr)) { 383291dc4a19SJan Höppner rc = PTR_ERR(cqr); 383391dc4a19SJan Höppner if (rc == -ENOMEM) { 383491dc4a19SJan Höppner if (list_empty(&ras_queue)) 383591dc4a19SJan Höppner goto out; 383691dc4a19SJan Höppner retry = 1; 383791dc4a19SJan Höppner break; 383891dc4a19SJan Höppner } 383991dc4a19SJan Höppner goto err_out; 384091dc4a19SJan Höppner } 384191dc4a19SJan Höppner 384291dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 384391dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 384491dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 384591dc4a19SJan Höppner cur_pos = stop + 1; 384691dc4a19SJan Höppner } 384791dc4a19SJan Höppner 384891dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 384991dc4a19SJan Höppner 385091dc4a19SJan Höppner err_out: 385191dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 385291dc4a19SJan Höppner device = cqr->startdev; 385391dc4a19SJan Höppner private = device->private; 385491dc4a19SJan Höppner 385591dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 385691dc4a19SJan Höppner list_del_init(&cqr->blocklist); 385791dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 385891dc4a19SJan Höppner dasd_sfree_request(cqr, device); 385991dc4a19SJan Höppner private->count--; 386091dc4a19SJan Höppner } 386191dc4a19SJan Höppner } while (retry); 386291dc4a19SJan Höppner 386391dc4a19SJan Höppner out: 386491dc4a19SJan Höppner return rc; 386591dc4a19SJan Höppner } 386691dc4a19SJan Höppner 386791dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 386891dc4a19SJan Höppner struct format_data_t *rdata) 386991dc4a19SJan Höppner { 387091dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 387191dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 387291dc4a19SJan Höppner else if (rdata->intensity == 0) 387391dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 387491dc4a19SJan Höppner rdata->stop_unit); 387591dc4a19SJan Höppner else 387691dc4a19SJan Höppner return -EINVAL; 387791dc4a19SJan Höppner } 387891dc4a19SJan Höppner 3879f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3880f3eb5384SStefan Weinhuber struct dasd_device *startdev, 38818e09f215SStefan Weinhuber struct dasd_block *block, 3882f3eb5384SStefan Weinhuber struct request *req, 3883f3eb5384SStefan Weinhuber sector_t first_rec, 3884f3eb5384SStefan Weinhuber sector_t last_rec, 3885f3eb5384SStefan Weinhuber sector_t first_trk, 3886f3eb5384SStefan Weinhuber sector_t last_trk, 3887f3eb5384SStefan Weinhuber unsigned int first_offs, 3888f3eb5384SStefan Weinhuber unsigned int last_offs, 3889f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3890f3eb5384SStefan Weinhuber unsigned int blksize) 38911da177e4SLinus Torvalds { 38921da177e4SLinus Torvalds struct dasd_eckd_private *private; 38931da177e4SLinus Torvalds unsigned long *idaws; 38941da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 38951da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 38961da177e4SLinus Torvalds struct ccw1 *ccw; 38975705f702SNeilBrown struct req_iterator iter; 38987988613bSKent Overstreet struct bio_vec bv; 38991da177e4SLinus Torvalds char *dst; 3900f3eb5384SStefan Weinhuber unsigned int off; 39011da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3902f3eb5384SStefan Weinhuber sector_t recid; 39031da177e4SLinus Torvalds unsigned char cmd, rcmd; 39048e09f215SStefan Weinhuber int use_prefix; 39058e09f215SStefan Weinhuber struct dasd_device *basedev; 39061da177e4SLinus Torvalds 39078e09f215SStefan Weinhuber basedev = block->base; 3908543691a4SSebastian Ott private = basedev->private; 39091da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39101da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 39111da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 39121da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 39131da177e4SLinus Torvalds else 39141da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3915f3eb5384SStefan Weinhuber 39161da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 39171da177e4SLinus Torvalds count = 0; 39181da177e4SLinus Torvalds cidaw = 0; 39195705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39207988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 39211da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 39221da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 39237988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 39247988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 39257988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 39261da177e4SLinus Torvalds } 39271da177e4SLinus Torvalds /* Paranoia. */ 39281da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 39291da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 39308e09f215SStefan Weinhuber 39318e09f215SStefan Weinhuber /* use the prefix command if available */ 39328e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 39338e09f215SStefan Weinhuber if (use_prefix) { 39348e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 39358e09f215SStefan Weinhuber cplength = 2 + count; 39368e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 39378e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 39388e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 39398e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 39408e09f215SStefan Weinhuber } else { 39411da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 39421da177e4SLinus Torvalds cplength = 2 + count; 39431da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 39448e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 39458e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 39461da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 39478e09f215SStefan Weinhuber } 39481da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 39491da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 39501da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 39511da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 39521da177e4SLinus Torvalds cplength += count; 39531da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 39541da177e4SLinus Torvalds } 39551da177e4SLinus Torvalds /* Allocate the ccw request. */ 395668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3957c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 39581da177e4SLinus Torvalds if (IS_ERR(cqr)) 39591da177e4SLinus Torvalds return cqr; 39601da177e4SLinus Torvalds ccw = cqr->cpaddr; 39618e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 39628e09f215SStefan Weinhuber if (use_prefix) { 39638e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 39648e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 39658e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 39668e09f215SStefan Weinhuber * Try again later. 39678e09f215SStefan Weinhuber */ 39688e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3969d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3970d54853efSMartin Schwidefsky } 39718e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 39728e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 39738e09f215SStefan Weinhuber } else { 39748e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 397545f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 39768e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 39778e09f215SStefan Weinhuber * Try again later. 39788e09f215SStefan Weinhuber */ 39798e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 39808e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 39818e09f215SStefan Weinhuber } 39828e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 39838e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 39848e09f215SStefan Weinhuber } 39851da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 39861da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 39871da177e4SLinus Torvalds recid = first_rec; 39881da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 39891da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 39901da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 39911da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 39928e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 39931da177e4SLinus Torvalds } 39945705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39957988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39961da177e4SLinus Torvalds if (dasd_page_cache) { 39971da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3998441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 39991da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 40007988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 40011da177e4SLinus Torvalds if (copy) 40027988613bSKent Overstreet dst = copy + bv.bv_offset; 40031da177e4SLinus Torvalds } 40047988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 40051da177e4SLinus Torvalds sector_t trkid = recid; 40061da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 40071da177e4SLinus Torvalds rcmd = cmd; 40081da177e4SLinus Torvalds count = blksize; 40091da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 40101da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 40111da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 40121da177e4SLinus Torvalds rcmd |= 0x8; 40131da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 4014ec5883abSHorst Hummel if (count < blksize && 4015ec5883abSHorst Hummel rq_data_dir(req) == READ) 40161da177e4SLinus Torvalds memset(dst + count, 0xe5, 40171da177e4SLinus Torvalds blksize - count); 40181da177e4SLinus Torvalds } 40191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40201da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 40211da177e4SLinus Torvalds trkid, recoffs + 1, 40228e09f215SStefan Weinhuber 1, rcmd, basedev, count); 40231da177e4SLinus Torvalds } 40241da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 40251da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 40261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40271da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 40281da177e4SLinus Torvalds trkid, recoffs + 1, 40291da177e4SLinus Torvalds last_rec - recid + 1, 40308e09f215SStefan Weinhuber cmd, basedev, count); 40311da177e4SLinus Torvalds } 40321da177e4SLinus Torvalds /* Read/write ccw. */ 40331da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 40341da177e4SLinus Torvalds ccw->cmd_code = rcmd; 40351da177e4SLinus Torvalds ccw->count = count; 40361da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 40371da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 40381da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 40391da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 40401da177e4SLinus Torvalds } else { 40411da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 40421da177e4SLinus Torvalds ccw->flags = 0; 40431da177e4SLinus Torvalds } 40441da177e4SLinus Torvalds ccw++; 40451da177e4SLinus Torvalds dst += blksize; 40461da177e4SLinus Torvalds recid++; 40471da177e4SLinus Torvalds } 40481da177e4SLinus Torvalds } 404913de227bSHolger Smolinski if (blk_noretry_request(req) || 405013de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 40511c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 40528e09f215SStefan Weinhuber cqr->startdev = startdev; 40538e09f215SStefan Weinhuber cqr->memdev = startdev; 40548e09f215SStefan Weinhuber cqr->block = block; 40557c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4056c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 40571f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 40581aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 40591da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 40605e2b17e7SJan Höppner 40615e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 40625e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 40635e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 40645e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 40655e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 40665e2b17e7SJan Höppner } 40675e2b17e7SJan Höppner 40681da177e4SLinus Torvalds return cqr; 40691da177e4SLinus Torvalds } 40701da177e4SLinus Torvalds 4071f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 4072f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4073f3eb5384SStefan Weinhuber struct dasd_block *block, 4074f3eb5384SStefan Weinhuber struct request *req, 4075f3eb5384SStefan Weinhuber sector_t first_rec, 4076f3eb5384SStefan Weinhuber sector_t last_rec, 4077f3eb5384SStefan Weinhuber sector_t first_trk, 4078f3eb5384SStefan Weinhuber sector_t last_trk, 4079f3eb5384SStefan Weinhuber unsigned int first_offs, 4080f3eb5384SStefan Weinhuber unsigned int last_offs, 4081f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4082f3eb5384SStefan Weinhuber unsigned int blksize) 4083f3eb5384SStefan Weinhuber { 4084f3eb5384SStefan Weinhuber unsigned long *idaws; 4085f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4086f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4087f3eb5384SStefan Weinhuber struct req_iterator iter; 40887988613bSKent Overstreet struct bio_vec bv; 4089f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 4090f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 4091f3eb5384SStefan Weinhuber unsigned int tlf; 4092f3eb5384SStefan Weinhuber sector_t recid; 4093f3eb5384SStefan Weinhuber unsigned char cmd; 4094f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4095f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 4096f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 4097f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 4098f3eb5384SStefan Weinhuber sector_t trkid; 4099f3eb5384SStefan Weinhuber unsigned int recoffs; 4100f3eb5384SStefan Weinhuber 4101f3eb5384SStefan Weinhuber basedev = block->base; 4102f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 4103f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4104f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 4105f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4106f3eb5384SStefan Weinhuber else 4107f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4108f3eb5384SStefan Weinhuber 4109f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 4110f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 4111f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 4112f3eb5384SStefan Weinhuber * of records as upper limit. 4113f3eb5384SStefan Weinhuber */ 4114f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 4115f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4116f3eb5384SStefan Weinhuber 4117f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 4118f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 4119f3eb5384SStefan Weinhuber 41207bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 4121f3eb5384SStefan Weinhuber 4122f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 412368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 4124c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 4125f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4126f3eb5384SStefan Weinhuber return cqr; 4127f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4128f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4129f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4130f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4131f3eb5384SStefan Weinhuber else 4132f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4133f3eb5384SStefan Weinhuber tlf *= blksize; 4134f3eb5384SStefan Weinhuber 4135f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 4136f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 4137f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 4138f3eb5384SStefan Weinhuber trkcount, blksize, 4139f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 4140f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4141f3eb5384SStefan Weinhuber * Try again later. 4142f3eb5384SStefan Weinhuber */ 4143f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4144f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 4145f3eb5384SStefan Weinhuber } 4146f3eb5384SStefan Weinhuber 4147f3eb5384SStefan Weinhuber /* 4148f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 4149f3eb5384SStefan Weinhuber * following conditions: 4150f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 4151f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 4152f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 4153f3eb5384SStefan Weinhuber */ 4154f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 4155f3eb5384SStefan Weinhuber recid = first_rec; 4156f3eb5384SStefan Weinhuber new_track = 1; 4157f3eb5384SStefan Weinhuber end_idaw = 0; 4158f3eb5384SStefan Weinhuber len_to_track_end = 0; 4159246ccea1SMartin Schwidefsky idaw_dst = NULL; 4160f3eb5384SStefan Weinhuber idaw_len = 0; 4161f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 41627988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 41637988613bSKent Overstreet seg_len = bv.bv_len; 4164f3eb5384SStefan Weinhuber while (seg_len) { 4165f3eb5384SStefan Weinhuber if (new_track) { 4166f3eb5384SStefan Weinhuber trkid = recid; 4167f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 4168f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 4169f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 4170f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 4171f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 4172f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4173f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 4174f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 4175f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4176f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 4177f3eb5384SStefan Weinhuber ccw++; 4178f3eb5384SStefan Weinhuber recid += count; 4179f3eb5384SStefan Weinhuber new_track = 0; 418052db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 418152db45c3SStefan Weinhuber if (!idaw_dst) 418252db45c3SStefan Weinhuber idaw_dst = dst; 4183f3eb5384SStefan Weinhuber } 418452db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 418552db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 4186f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 4187f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 4188f3eb5384SStefan Weinhuber * idaw ends 4189f3eb5384SStefan Weinhuber */ 419052db45c3SStefan Weinhuber if (!idaw_dst) { 419152db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 419252db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 419352db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 419452db45c3SStefan Weinhuber } else 4195f3eb5384SStefan Weinhuber idaw_dst = dst; 419652db45c3SStefan Weinhuber } 4197f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 4198f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4199f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 4200f3eb5384SStefan Weinhuber } 4201f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4202f3eb5384SStefan Weinhuber seg_len -= part_len; 4203f3eb5384SStefan Weinhuber dst += part_len; 4204f3eb5384SStefan Weinhuber idaw_len += part_len; 4205f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 4206f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 4207f3eb5384SStefan Weinhuber * -> create an idaw 4208f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 4209f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 4210f3eb5384SStefan Weinhuber */ 4211f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4212f3eb5384SStefan Weinhuber end_idaw = 1; 4213f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 4214f3eb5384SStefan Weinhuber if (!len_to_track_end) { 4215f3eb5384SStefan Weinhuber new_track = 1; 4216f3eb5384SStefan Weinhuber end_idaw = 1; 4217f3eb5384SStefan Weinhuber } 4218f3eb5384SStefan Weinhuber if (end_idaw) { 4219f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 4220f3eb5384SStefan Weinhuber idaw_len); 4221246ccea1SMartin Schwidefsky idaw_dst = NULL; 4222f3eb5384SStefan Weinhuber idaw_len = 0; 4223f3eb5384SStefan Weinhuber end_idaw = 0; 4224f3eb5384SStefan Weinhuber } 4225f3eb5384SStefan Weinhuber } 4226f3eb5384SStefan Weinhuber } 4227f3eb5384SStefan Weinhuber 4228f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4229f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4230f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4231f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4232f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4233f3eb5384SStefan Weinhuber cqr->block = block; 42347c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4235c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 42361f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 42371aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4238f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 42395e2b17e7SJan Höppner 42405e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 42415e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 42425e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 42435e2b17e7SJan Höppner 4244f3eb5384SStefan Weinhuber return cqr; 4245f3eb5384SStefan Weinhuber } 4246f3eb5384SStefan Weinhuber 4247f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4248f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4249f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4250f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4251f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4252f3eb5384SStefan Weinhuber unsigned int blksize, 4253f3eb5384SStefan Weinhuber unsigned int total_data_size, 4254f3eb5384SStefan Weinhuber unsigned int tlf, 4255f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4256f3eb5384SStefan Weinhuber { 4257f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4258f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4259f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4260f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4261f3eb5384SStefan Weinhuber struct dcw *dcw; 4262f3eb5384SStefan Weinhuber 4263f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4264f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4265f3eb5384SStefan Weinhuber u8 pfx_cmd; 4266f3eb5384SStefan Weinhuber 4267f3eb5384SStefan Weinhuber int rc = 0; 4268f3eb5384SStefan Weinhuber int sector = 0; 4269f3eb5384SStefan Weinhuber int dn, d; 4270f3eb5384SStefan Weinhuber 4271f3eb5384SStefan Weinhuber 4272f3eb5384SStefan Weinhuber /* setup prefix data */ 4273543691a4SSebastian Ott basepriv = basedev->private; 4274543691a4SSebastian Ott startpriv = startdev->private; 4275f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4276f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4277f3eb5384SStefan Weinhuber 4278f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4279f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4280f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 4281f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 4282f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4283f3eb5384SStefan Weinhuber 4284f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4285da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4286f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4287da340f92SStefan Haberland 4288da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4289da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4290f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4291f3eb5384SStefan Weinhuber } 4292f3eb5384SStefan Weinhuber 4293f3eb5384SStefan Weinhuber switch (cmd) { 4294f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4295f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4296f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4297f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4298f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4299f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4300f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4301f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4302f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4303f3eb5384SStefan Weinhuber break; 4304f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4305f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4306f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4307f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 43085628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4309f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4310f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4311f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4312f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4313f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 431445f186beSJan Höppner /* 431545f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 431645f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 431745f186beSJan Höppner * data as well. 431845f186beSJan Höppner */ 431945f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 432045f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4321f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4322f3eb5384SStefan Weinhuber break; 43238fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 43248fd57520SJan Höppner dedata->mask.perm = 0x1; 43258fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 43268fd57520SJan Höppner dedata->ga_extended |= 0x42; 43278fd57520SJan Höppner dedata->blk_size = blksize; 43288fd57520SJan Höppner lredata->operation.orientation = 0x2; 43298fd57520SJan Höppner lredata->operation.operation = 0x16; 43308fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 43318fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 43328fd57520SJan Höppner break; 4333f3eb5384SStefan Weinhuber default: 4334f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4335f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4336f3eb5384SStefan Weinhuber BUG(); 4337f3eb5384SStefan Weinhuber break; 4338f3eb5384SStefan Weinhuber } 4339f3eb5384SStefan Weinhuber if (rc) 4340f3eb5384SStefan Weinhuber return rc; 4341f3eb5384SStefan Weinhuber 4342f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4343f3eb5384SStefan Weinhuber 4344f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4345f3eb5384SStefan Weinhuber begcyl = trk / heads; 4346f3eb5384SStefan Weinhuber beghead = trk % heads; 4347f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4348f3eb5384SStefan Weinhuber endhead = totrk % heads; 4349f3eb5384SStefan Weinhuber 4350f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4351f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4352f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4353f3eb5384SStefan Weinhuber 4354f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4355f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4356f3eb5384SStefan Weinhuber else 4357f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4358f3eb5384SStefan Weinhuber } 4359f3eb5384SStefan Weinhuber 4360f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4361f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4362f3eb5384SStefan Weinhuber 4363f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4364f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4365f3eb5384SStefan Weinhuber 4366f3eb5384SStefan Weinhuber if (rec_on_trk) { 4367f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4368f3eb5384SStefan Weinhuber case 0x3390: 4369f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4370f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4371f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4372f3eb5384SStefan Weinhuber break; 4373f3eb5384SStefan Weinhuber case 0x3380: 4374f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4375f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4376f3eb5384SStefan Weinhuber break; 4377f3eb5384SStefan Weinhuber } 4378f3eb5384SStefan Weinhuber } 4379f3eb5384SStefan Weinhuber 43808fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 43818fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 43828fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 43838fd57520SJan Höppner lredata->sector = 0xff; 43848fd57520SJan Höppner } else { 4385f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4386f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 43878fd57520SJan Höppner lredata->sector = sector; 43888fd57520SJan Höppner } 4389f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4390f3eb5384SStefan Weinhuber lredata->length = tlf; 4391f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4392f3eb5384SStefan Weinhuber lredata->count = count; 4393f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4394f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4395f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4396f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4397f3eb5384SStefan Weinhuber 4398f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4399f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4400757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4401f3eb5384SStefan Weinhuber } 4402f3eb5384SStefan Weinhuber 4403f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4404f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4405f3eb5384SStefan Weinhuber struct dasd_block *block, 4406f3eb5384SStefan Weinhuber struct request *req, 4407f3eb5384SStefan Weinhuber sector_t first_rec, 4408f3eb5384SStefan Weinhuber sector_t last_rec, 4409f3eb5384SStefan Weinhuber sector_t first_trk, 4410f3eb5384SStefan Weinhuber sector_t last_trk, 4411f3eb5384SStefan Weinhuber unsigned int first_offs, 4412f3eb5384SStefan Weinhuber unsigned int last_offs, 4413f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4414f3eb5384SStefan Weinhuber unsigned int blksize) 4415f3eb5384SStefan Weinhuber { 4416f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4417f3eb5384SStefan Weinhuber struct req_iterator iter; 44187988613bSKent Overstreet struct bio_vec bv; 4419f3eb5384SStefan Weinhuber char *dst; 4420f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4421f3eb5384SStefan Weinhuber unsigned char cmd; 4422f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4423f3eb5384SStefan Weinhuber unsigned int tlf; 4424f3eb5384SStefan Weinhuber struct itcw *itcw; 4425f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4426f3eb5384SStefan Weinhuber int itcw_op; 4427f3eb5384SStefan Weinhuber size_t itcw_size; 4428ef19298bSStefan Weinhuber u8 tidaw_flags; 4429ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4430ef19298bSStefan Weinhuber unsigned char new_track; 4431ef19298bSStefan Weinhuber sector_t recid, trkid; 4432ef19298bSStefan Weinhuber unsigned int offs; 4433ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4434cd10502bSJulia Lawall int ret; 4435f3eb5384SStefan Weinhuber 4436f3eb5384SStefan Weinhuber basedev = block->base; 4437f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4438f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4439f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4440f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4441f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4442f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4443f3eb5384SStefan Weinhuber } else 4444f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4445f3eb5384SStefan Weinhuber 4446f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4447f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4448f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4449ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4450ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4451f3eb5384SStefan Weinhuber */ 4452f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4453f3eb5384SStefan Weinhuber ctidaw = 0; 4454f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4455f3eb5384SStefan Weinhuber ++ctidaw; 4456f3eb5384SStefan Weinhuber } 4457ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4458ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4459f3eb5384SStefan Weinhuber 4460f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4461f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4462c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4463c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4464f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4465f3eb5384SStefan Weinhuber return cqr; 4466f3eb5384SStefan Weinhuber 4467f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4468f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4469f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4470f3eb5384SStefan Weinhuber else 4471f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4472f3eb5384SStefan Weinhuber tlf *= blksize; 4473f3eb5384SStefan Weinhuber 4474f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4475ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4476cd10502bSJulia Lawall ret = -EINVAL; 4477cd10502bSJulia Lawall goto out_error; 4478ef19298bSStefan Weinhuber } 4479f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4480f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4481f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4482f3eb5384SStefan Weinhuber first_offs + 1, 4483f3eb5384SStefan Weinhuber trkcount, blksize, 4484f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4485f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4486f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4487f3eb5384SStefan Weinhuber * Try again later. 4488f3eb5384SStefan Weinhuber */ 4489cd10502bSJulia Lawall ret = -EAGAIN; 4490cd10502bSJulia Lawall goto out_error; 4491f3eb5384SStefan Weinhuber } 4492d54cddb6SHeiko Carstens len_to_track_end = 0; 4493f3eb5384SStefan Weinhuber /* 4494f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4495f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4496f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4497f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4498ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4499ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4500f3eb5384SStefan Weinhuber */ 4501ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4502ef19298bSStefan Weinhuber new_track = 1; 4503ef19298bSStefan Weinhuber recid = first_rec; 4504f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 45057988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 45067988613bSKent Overstreet seg_len = bv.bv_len; 4507ef19298bSStefan Weinhuber while (seg_len) { 4508ef19298bSStefan Weinhuber if (new_track) { 4509ef19298bSStefan Weinhuber trkid = recid; 4510ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4511ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4512ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4513ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4514ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4515ef19298bSStefan Weinhuber recid += count; 4516ef19298bSStefan Weinhuber new_track = 0; 4517f3eb5384SStefan Weinhuber } 4518ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4519ef19298bSStefan Weinhuber seg_len -= part_len; 4520ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4521ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4522ef19298bSStefan Weinhuber if (!len_to_track_end) { 4523ef19298bSStefan Weinhuber new_track = 1; 4524ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4525ef19298bSStefan Weinhuber } else 4526ef19298bSStefan Weinhuber tidaw_flags = 0; 4527ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4528ef19298bSStefan Weinhuber dst, part_len); 4529cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4530cd10502bSJulia Lawall ret = -EINVAL; 4531cd10502bSJulia Lawall goto out_error; 4532cd10502bSJulia Lawall } 4533ef19298bSStefan Weinhuber dst += part_len; 4534ef19298bSStefan Weinhuber } 4535ef19298bSStefan Weinhuber } 4536ef19298bSStefan Weinhuber } else { 4537ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 45387988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 4539ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 45407988613bSKent Overstreet dst, bv.bv_len); 4541cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4542cd10502bSJulia Lawall ret = -EINVAL; 4543cd10502bSJulia Lawall goto out_error; 4544cd10502bSJulia Lawall } 4545ef19298bSStefan Weinhuber } 4546ef19298bSStefan Weinhuber } 4547ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4548ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4549f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4550f3eb5384SStefan Weinhuber 4551f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4552f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4553f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4554ef19298bSStefan Weinhuber cqr->cpmode = 1; 4555f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4556f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4557f3eb5384SStefan Weinhuber cqr->block = block; 45587c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4559c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 45601f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 45611aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4562f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 45635e2b17e7SJan Höppner 45645e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 45655e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 45665e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 45675e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 45685e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 45695e2b17e7SJan Höppner } 45705e2b17e7SJan Höppner 4571f3eb5384SStefan Weinhuber return cqr; 4572cd10502bSJulia Lawall out_error: 4573cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4574cd10502bSJulia Lawall return ERR_PTR(ret); 4575f3eb5384SStefan Weinhuber } 4576f3eb5384SStefan Weinhuber 4577f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4578f3eb5384SStefan Weinhuber struct dasd_block *block, 4579f3eb5384SStefan Weinhuber struct request *req) 4580f3eb5384SStefan Weinhuber { 4581ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4582f3eb5384SStefan Weinhuber int use_prefix; 4583ef19298bSStefan Weinhuber int fcx_multitrack; 458445b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4585f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4586f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4587f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4588f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4589f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4590f3eb5384SStefan Weinhuber int cdlspecial; 4591ef19298bSStefan Weinhuber unsigned int data_size; 4592f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4593f3eb5384SStefan Weinhuber 4594f3eb5384SStefan Weinhuber basedev = block->base; 4595543691a4SSebastian Ott private = basedev->private; 4596f3eb5384SStefan Weinhuber 4597f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4598f3eb5384SStefan Weinhuber blksize = block->bp_block; 4599f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 46006fca97a9SStefan Haberland if (blk_per_trk == 0) 46016fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4602f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 460383096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4604f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4605f3eb5384SStefan Weinhuber last_rec = last_trk = 460683096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4607f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4608f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4609f3eb5384SStefan Weinhuber 4610ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4611ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 461226a35f37SStefan Weinhuber if (data_size % blksize) 461326a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4614ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4615ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4616ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4617f3eb5384SStefan Weinhuber 4618f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4619f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4620f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4621f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4622f3eb5384SStefan Weinhuber 4623f3eb5384SStefan Weinhuber cqr = NULL; 4624f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4625f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4626ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4627ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4628f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4629f3eb5384SStefan Weinhuber first_rec, last_rec, 4630f3eb5384SStefan Weinhuber first_trk, last_trk, 4631f3eb5384SStefan Weinhuber first_offs, last_offs, 4632f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4633ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4634ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4635f3eb5384SStefan Weinhuber cqr = NULL; 4636f3eb5384SStefan Weinhuber } else if (use_prefix && 4637f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4638f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4639f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4640f3eb5384SStefan Weinhuber first_rec, last_rec, 4641f3eb5384SStefan Weinhuber first_trk, last_trk, 4642f3eb5384SStefan Weinhuber first_offs, last_offs, 4643f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4644ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4645ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4646f3eb5384SStefan Weinhuber cqr = NULL; 4647f3eb5384SStefan Weinhuber } 4648f3eb5384SStefan Weinhuber if (!cqr) 4649f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4650f3eb5384SStefan Weinhuber first_rec, last_rec, 4651f3eb5384SStefan Weinhuber first_trk, last_trk, 4652f3eb5384SStefan Weinhuber first_offs, last_offs, 4653f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4654f3eb5384SStefan Weinhuber return cqr; 4655f3eb5384SStefan Weinhuber } 4656f3eb5384SStefan Weinhuber 4657bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4658e4dbb0f2SStefan Haberland struct dasd_block *block, 4659e4dbb0f2SStefan Haberland struct request *req) 4660e4dbb0f2SStefan Haberland { 46619d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4662e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4663e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4664558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 46659d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 46669d2be0c1SJan Höppner struct dasd_device *basedev; 46679d2be0c1SJan Höppner struct req_iterator iter; 46689d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 46699d2be0c1SJan Höppner unsigned int first_offs; 46709d2be0c1SJan Höppner unsigned int trkcount; 46719d2be0c1SJan Höppner unsigned long *idaws; 46729d2be0c1SJan Höppner unsigned int size; 46739d2be0c1SJan Höppner unsigned char cmd; 46749d2be0c1SJan Höppner struct bio_vec bv; 46759d2be0c1SJan Höppner struct ccw1 *ccw; 46769d2be0c1SJan Höppner int use_prefix; 46779d2be0c1SJan Höppner void *data; 46789d2be0c1SJan Höppner char *dst; 4679e4dbb0f2SStefan Haberland 4680e4dbb0f2SStefan Haberland /* 4681e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4682558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4683558b9ef0SStefan Weinhuber * the request with dummy pages. 4684e4dbb0f2SStefan Haberland */ 4685558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4686558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4687558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4688558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4689558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4690558b9ef0SStefan Weinhuber basedev = block->base; 4691558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4692558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4693558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4694e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4695558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 46969d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4697e4dbb0f2SStefan Haberland } 4698e4dbb0f2SStefan Haberland 4699e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4700e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4701e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4702e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4703e4dbb0f2SStefan Haberland first_offs = 0; 4704e4dbb0f2SStefan Haberland 4705e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4706e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4707e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4708e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 47099d2be0c1SJan Höppner else 47109d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4711e4dbb0f2SStefan Haberland 4712e4dbb0f2SStefan Haberland /* 4713e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4714e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4715e4dbb0f2SStefan Haberland */ 4716e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4717e4dbb0f2SStefan Haberland 4718e4dbb0f2SStefan Haberland /* 47199d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 47209d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4721e4dbb0f2SStefan Haberland */ 47229d2be0c1SJan Höppner base_priv = basedev->private; 47239d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 47249d2be0c1SJan Höppner if (use_prefix) { 47259d2be0c1SJan Höppner cplength = 1 + trkcount; 47269d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 47279d2be0c1SJan Höppner } else { 47289d2be0c1SJan Höppner cplength = 2 + trkcount; 47299d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 47309d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 47319d2be0c1SJan Höppner } 47329d2be0c1SJan Höppner size = ALIGN(size, 8); 4733e4dbb0f2SStefan Haberland 47347bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4735e4dbb0f2SStefan Haberland 4736e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4737e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4738c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4739e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 47409d2be0c1SJan Höppner return cqr; 4741e4dbb0f2SStefan Haberland 47429d2be0c1SJan Höppner ccw = cqr->cpaddr; 47439d2be0c1SJan Höppner data = cqr->data; 47449d2be0c1SJan Höppner 47459d2be0c1SJan Höppner if (use_prefix) { 47469d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 47479d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 47489d2be0c1SJan Höppner } else { 47499d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 47509d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 47519d2be0c1SJan Höppner 47529d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 47539d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 47549d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4755e4dbb0f2SStefan Haberland } 4756e4dbb0f2SStefan Haberland 47579d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4758e4dbb0f2SStefan Haberland len_to_track_end = 0; 4759558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4760558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4761558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4762558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4763558b9ef0SStefan Weinhuber ccw->count = 57326; 4764558b9ef0SStefan Weinhuber /* 64k map to one track */ 4765558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4766558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4767558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4768558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4769558b9ef0SStefan Weinhuber ccw++; 4770558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4771558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4772558b9ef0SStefan Weinhuber } 4773e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 47747988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 47757988613bSKent Overstreet seg_len = bv.bv_len; 4776558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4777558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4778e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4779e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4780e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4781e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4782e4dbb0f2SStefan Haberland ccw->count = 57326; 4783e4dbb0f2SStefan Haberland /* 64k map to one track */ 4784e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4785e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4786e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4787e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4788e4dbb0f2SStefan Haberland ccw++; 4789e4dbb0f2SStefan Haberland } 4790e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4791e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4792e4dbb0f2SStefan Haberland } 4793558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4794558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4795e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4796e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4797e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4798e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4799e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4800e4dbb0f2SStefan Haberland cqr->block = block; 4801e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4802c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 48031f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 48041aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4805e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4806e4dbb0f2SStefan Haberland 4807e4dbb0f2SStefan Haberland return cqr; 4808e4dbb0f2SStefan Haberland } 4809e4dbb0f2SStefan Haberland 4810e4dbb0f2SStefan Haberland 48111da177e4SLinus Torvalds static int 48121da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 48131da177e4SLinus Torvalds { 48141da177e4SLinus Torvalds struct dasd_eckd_private *private; 48151da177e4SLinus Torvalds struct ccw1 *ccw; 48165705f702SNeilBrown struct req_iterator iter; 48177988613bSKent Overstreet struct bio_vec bv; 48181da177e4SLinus Torvalds char *dst, *cda; 48191da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 48201da177e4SLinus Torvalds sector_t recid; 48215705f702SNeilBrown int status; 48221da177e4SLinus Torvalds 48231da177e4SLinus Torvalds if (!dasd_page_cache) 48241da177e4SLinus Torvalds goto out; 4825543691a4SSebastian Ott private = cqr->block->base->private; 48268e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 48271da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 482883096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 48291da177e4SLinus Torvalds ccw = cqr->cpaddr; 48301da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 48311da177e4SLinus Torvalds ccw++; 48321da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 48331da177e4SLinus Torvalds ccw++; 48345705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 48357988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 48367988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 48371da177e4SLinus Torvalds /* Skip locate record. */ 48381da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 48391da177e4SLinus Torvalds ccw++; 48401da177e4SLinus Torvalds if (dst) { 48411da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 48421da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 48431da177e4SLinus Torvalds else 48441da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 48451da177e4SLinus Torvalds if (dst != cda) { 48461da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 48477988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 48481da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 48491da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 48501da177e4SLinus Torvalds } 48511da177e4SLinus Torvalds dst = NULL; 48521da177e4SLinus Torvalds } 48531da177e4SLinus Torvalds ccw++; 48541da177e4SLinus Torvalds recid++; 48551da177e4SLinus Torvalds } 48561da177e4SLinus Torvalds } 48571da177e4SLinus Torvalds out: 48581da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 48598e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48601da177e4SLinus Torvalds return status; 48611da177e4SLinus Torvalds } 48621da177e4SLinus Torvalds 48638e09f215SStefan Weinhuber /* 4864f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 48658e09f215SStefan Weinhuber * 48668e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 48678e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 48688e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 48698e09f215SStefan Weinhuber */ 48708e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 48718e09f215SStefan Weinhuber { 48728e09f215SStefan Weinhuber struct ccw1 *ccw; 48738e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4874f3eb5384SStefan Weinhuber struct tcw *tcw; 4875f3eb5384SStefan Weinhuber struct tccb *tccb; 4876f3eb5384SStefan Weinhuber struct dcw *dcw; 48778e09f215SStefan Weinhuber 4878f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4879f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4880f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4881f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4882f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4883f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4884f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4885f3eb5384SStefan Weinhuber } else { 48868e09f215SStefan Weinhuber ccw = cqr->cpaddr; 48878e09f215SStefan Weinhuber pfxdata = cqr->data; 48888e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 48898e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 48908e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 48918e09f215SStefan Weinhuber } 48928e09f215SStefan Weinhuber } 4893f3eb5384SStefan Weinhuber } 48948e09f215SStefan Weinhuber 48958e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 48968e09f215SStefan Weinhuber 48978e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 48988e09f215SStefan Weinhuber struct dasd_block *block, 48998e09f215SStefan Weinhuber struct request *req) 49008e09f215SStefan Weinhuber { 49018e09f215SStefan Weinhuber struct dasd_eckd_private *private; 4902964ce509SStefan Haberland struct dasd_device *startdev; 49037e64db15SJan Höppner unsigned long flags; 4904964ce509SStefan Haberland struct dasd_ccw_req *cqr; 49058e09f215SStefan Weinhuber 49068e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 49078e09f215SStefan Weinhuber if (!startdev) 49088e09f215SStefan Weinhuber startdev = base; 4909543691a4SSebastian Ott private = startdev->private; 49108e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 49118e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 49128e09f215SStefan Weinhuber 49138e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 49148e09f215SStefan Weinhuber private->count++; 4915e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4916bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4917e4dbb0f2SStefan Haberland else 49188e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 49198e09f215SStefan Weinhuber if (IS_ERR(cqr)) 49208e09f215SStefan Weinhuber private->count--; 49218e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 49228e09f215SStefan Weinhuber return cqr; 49238e09f215SStefan Weinhuber } 49248e09f215SStefan Weinhuber 49258e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 49268e09f215SStefan Weinhuber struct request *req) 49278e09f215SStefan Weinhuber { 49288e09f215SStefan Weinhuber struct dasd_eckd_private *private; 49298e09f215SStefan Weinhuber unsigned long flags; 49308e09f215SStefan Weinhuber 49318e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4932543691a4SSebastian Ott private = cqr->memdev->private; 49338e09f215SStefan Weinhuber private->count--; 49348e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 49358e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 49368e09f215SStefan Weinhuber } 49378e09f215SStefan Weinhuber 49381da177e4SLinus Torvalds static int 49391da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 49401da177e4SLinus Torvalds struct dasd_information2_t * info) 49411da177e4SLinus Torvalds { 4942543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49431da177e4SLinus Torvalds 49441da177e4SLinus Torvalds info->label_block = 2; 49451da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 49461da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4947543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 49481da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4949543691a4SSebastian Ott sizeof(private->rdc_data)); 49504abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 49514abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 49524abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 49534abb08c2SStefan Weinhuber info->confdata_size); 49541da177e4SLinus Torvalds return 0; 49551da177e4SLinus Torvalds } 49561da177e4SLinus Torvalds 49571da177e4SLinus Torvalds /* 49581da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 49591da177e4SLinus Torvalds */ 49601da177e4SLinus Torvalds 49611da177e4SLinus Torvalds /* 49621da177e4SLinus Torvalds * Release device ioctl. 49631da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 49641da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 49651da177e4SLinus Torvalds */ 49661da177e4SLinus Torvalds static int 49671107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 49681da177e4SLinus Torvalds { 49691da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 49701da177e4SLinus Torvalds int rc; 4971f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4972f932bceaSStefan Weinhuber int useglobal; 49731da177e4SLinus Torvalds 49741da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 49751da177e4SLinus Torvalds return -EACCES; 49761da177e4SLinus Torvalds 4977f932bceaSStefan Weinhuber useglobal = 0; 4978c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 49791da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4980f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4981f932bceaSStefan Weinhuber useglobal = 1; 4982f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4983f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4984f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4985f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4986f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4987f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4988f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 49891da177e4SLinus Torvalds } 4990f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4991f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4992f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4993f3eb5384SStefan Weinhuber ccw->count = 32; 4994f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 49958e09f215SStefan Weinhuber cqr->startdev = device; 49968e09f215SStefan Weinhuber cqr->memdev = device; 49971da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 49981c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4999336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50001da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50011aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50021da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50031da177e4SLinus Torvalds 50041da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50055a27e60dSStefan Weinhuber if (!rc) 50065a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50071da177e4SLinus Torvalds 5008f932bceaSStefan Weinhuber if (useglobal) 5009f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5010f932bceaSStefan Weinhuber else 50118e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50121da177e4SLinus Torvalds return rc; 50131da177e4SLinus Torvalds } 50141da177e4SLinus Torvalds 50151da177e4SLinus Torvalds /* 50161da177e4SLinus Torvalds * Reserve device ioctl. 50171da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 50181da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 50191da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 50201da177e4SLinus Torvalds */ 50211da177e4SLinus Torvalds static int 50221107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 50231da177e4SLinus Torvalds { 50241da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50251da177e4SLinus Torvalds int rc; 5026f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5027f932bceaSStefan Weinhuber int useglobal; 50281da177e4SLinus Torvalds 50291da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50301da177e4SLinus Torvalds return -EACCES; 50311da177e4SLinus Torvalds 5032f932bceaSStefan Weinhuber useglobal = 0; 5033c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50341da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5035f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5036f932bceaSStefan Weinhuber useglobal = 1; 5037f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5038f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5039f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5040f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5041f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5042f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5043f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50441da177e4SLinus Torvalds } 5045f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5046f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 5047f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5048f3eb5384SStefan Weinhuber ccw->count = 32; 5049f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 50508e09f215SStefan Weinhuber cqr->startdev = device; 50518e09f215SStefan Weinhuber cqr->memdev = device; 50521da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50531c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5054336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 50551da177e4SLinus Torvalds cqr->expires = 2 * HZ; 50561aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50571da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50581da177e4SLinus Torvalds 50591da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 50605a27e60dSStefan Weinhuber if (!rc) 50615a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 50621da177e4SLinus Torvalds 5063f932bceaSStefan Weinhuber if (useglobal) 5064f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5065f932bceaSStefan Weinhuber else 50668e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50671da177e4SLinus Torvalds return rc; 50681da177e4SLinus Torvalds } 50691da177e4SLinus Torvalds 50701da177e4SLinus Torvalds /* 50711da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 50721da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 50731da177e4SLinus Torvalds * (unconditional reserve) 50741da177e4SLinus Torvalds */ 50751da177e4SLinus Torvalds static int 50761107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 50771da177e4SLinus Torvalds { 50781da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50791da177e4SLinus Torvalds int rc; 5080f3eb5384SStefan Weinhuber struct ccw1 *ccw; 5081f932bceaSStefan Weinhuber int useglobal; 50821da177e4SLinus Torvalds 50831da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50841da177e4SLinus Torvalds return -EACCES; 50851da177e4SLinus Torvalds 5086f932bceaSStefan Weinhuber useglobal = 0; 5087c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 50881da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5089f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5090f932bceaSStefan Weinhuber useglobal = 1; 5091f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5092f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5093f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5094f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5095f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5096f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5097f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 50981da177e4SLinus Torvalds } 5099f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 5100f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 5101f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5102f3eb5384SStefan Weinhuber ccw->count = 32; 5103f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 51048e09f215SStefan Weinhuber cqr->startdev = device; 51058e09f215SStefan Weinhuber cqr->memdev = device; 51061da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 51071c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5108336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 51091da177e4SLinus Torvalds cqr->expires = 2 * HZ; 51101aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 51111da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 51121da177e4SLinus Torvalds 51131da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 51145a27e60dSStefan Weinhuber if (!rc) 51155a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 51161da177e4SLinus Torvalds 5117f932bceaSStefan Weinhuber if (useglobal) 5118f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5119f932bceaSStefan Weinhuber else 51208e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 51211da177e4SLinus Torvalds return rc; 51221da177e4SLinus Torvalds } 51231da177e4SLinus Torvalds 51241da177e4SLinus Torvalds /* 5125196339f1SStefan Weinhuber * SNID - Sense Path Group ID 5126196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 5127196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 5128196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 5129196339f1SStefan Weinhuber */ 5130196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 5131196339f1SStefan Weinhuber void __user *argp) 5132196339f1SStefan Weinhuber { 5133196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 5134196339f1SStefan Weinhuber int rc; 5135196339f1SStefan Weinhuber struct ccw1 *ccw; 5136196339f1SStefan Weinhuber int useglobal; 5137196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 5138196339f1SStefan Weinhuber 5139196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 5140196339f1SStefan Weinhuber return -EACCES; 5141196339f1SStefan Weinhuber 5142196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5143196339f1SStefan Weinhuber return -EFAULT; 5144196339f1SStefan Weinhuber 5145196339f1SStefan Weinhuber useglobal = 0; 5146196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 5147c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 5148c5205f2fSSebastian Ott NULL); 5149196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 5150196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 5151196339f1SStefan Weinhuber useglobal = 1; 5152196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 5153196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 5154196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 5155196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 5156196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 5157196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 5158196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 5159196339f1SStefan Weinhuber } 5160196339f1SStefan Weinhuber ccw = cqr->cpaddr; 5161196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 5162196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 5163196339f1SStefan Weinhuber ccw->count = 12; 5164196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 5165196339f1SStefan Weinhuber cqr->startdev = device; 5166196339f1SStefan Weinhuber cqr->memdev = device; 5167196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5168196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 51695a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 5170196339f1SStefan Weinhuber cqr->retries = 5; 5171196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 51721aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5173196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 5174196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 5175196339f1SStefan Weinhuber 5176196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 5177196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 5178196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5179196339f1SStefan Weinhuber rc = -EIO; 5180196339f1SStefan Weinhuber if (!rc) { 5181196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 5182196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5183196339f1SStefan Weinhuber rc = -EFAULT; 5184196339f1SStefan Weinhuber } 5185196339f1SStefan Weinhuber 5186196339f1SStefan Weinhuber if (useglobal) 5187196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5188196339f1SStefan Weinhuber else 5189196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 5190196339f1SStefan Weinhuber return rc; 5191196339f1SStefan Weinhuber } 5192196339f1SStefan Weinhuber 5193196339f1SStefan Weinhuber /* 51941da177e4SLinus Torvalds * Read performance statistics 51951da177e4SLinus Torvalds */ 51961da177e4SLinus Torvalds static int 51971107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 51981da177e4SLinus Torvalds { 51991da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 52001da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 52011da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 52021da177e4SLinus Torvalds struct ccw1 *ccw; 52031da177e4SLinus Torvalds int rc; 52041da177e4SLinus Torvalds 520568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 52061da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 52071da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 5208c5205f2fSSebastian Ott device, NULL); 52091da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5210fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 52111da177e4SLinus Torvalds "Could not allocate initialization request"); 52121da177e4SLinus Torvalds return PTR_ERR(cqr); 52131da177e4SLinus Torvalds } 52148e09f215SStefan Weinhuber cqr->startdev = device; 52158e09f215SStefan Weinhuber cqr->memdev = device; 52161da177e4SLinus Torvalds cqr->retries = 0; 5217eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 52181da177e4SLinus Torvalds cqr->expires = 10 * HZ; 52191da177e4SLinus Torvalds 52201da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 52211da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 52221da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 52231da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 52245d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 52251da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 52261da177e4SLinus Torvalds 52271da177e4SLinus Torvalds ccw = cqr->cpaddr; 52281da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 52291da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 52301da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 52311da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 52321da177e4SLinus Torvalds 52331da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 52341da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 52351da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 52361da177e4SLinus Torvalds 52371da177e4SLinus Torvalds ccw++; 52381da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 52391da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 52401da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 52411da177e4SLinus Torvalds 52421aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 52431da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 52441da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 52451da177e4SLinus Torvalds if (rc == 0) { 52461da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 52471da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 52481107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 52491107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 52501107ccfbSChristoph Hellwig rc = -EFAULT; 52511da177e4SLinus Torvalds } 52528e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 52531da177e4SLinus Torvalds return rc; 52541da177e4SLinus Torvalds } 52551da177e4SLinus Torvalds 52561da177e4SLinus Torvalds /* 52571da177e4SLinus Torvalds * Get attributes (cache operations) 52581da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 52591da177e4SLinus Torvalds */ 52601da177e4SLinus Torvalds static int 52611107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 52621da177e4SLinus Torvalds { 5263543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 52641107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 52651da177e4SLinus Torvalds int rc; 52661da177e4SLinus Torvalds 52671da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 52681da177e4SLinus Torvalds return -EACCES; 52691107ccfbSChristoph Hellwig if (!argp) 52701da177e4SLinus Torvalds return -EINVAL; 52711da177e4SLinus Torvalds 52721107ccfbSChristoph Hellwig rc = 0; 52731107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 52741107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 52751107ccfbSChristoph Hellwig rc = -EFAULT; 52761da177e4SLinus Torvalds 52771da177e4SLinus Torvalds return rc; 52781da177e4SLinus Torvalds } 52791da177e4SLinus Torvalds 52801da177e4SLinus Torvalds /* 52811da177e4SLinus Torvalds * Set attributes (cache operations) 52821da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 52831da177e4SLinus Torvalds */ 52841da177e4SLinus Torvalds static int 52851107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 52861da177e4SLinus Torvalds { 5287543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 52881da177e4SLinus Torvalds struct attrib_data_t attrib; 52891da177e4SLinus Torvalds 52901da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 52911da177e4SLinus Torvalds return -EACCES; 52921107ccfbSChristoph Hellwig if (!argp) 52931da177e4SLinus Torvalds return -EINVAL; 52941da177e4SLinus Torvalds 52951107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 52961da177e4SLinus Torvalds return -EFAULT; 52971da177e4SLinus Torvalds private->attrib = attrib; 52981da177e4SLinus Torvalds 5299fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5300fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 53011da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 53021da177e4SLinus Torvalds return 0; 53031da177e4SLinus Torvalds } 53041da177e4SLinus Torvalds 5305ab1d848fSNigel Hislop /* 5306ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5307ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5308ab1d848fSNigel Hislop */ 5309ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5310ab1d848fSNigel Hislop { 5311ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5312ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5313ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5314ab1d848fSNigel Hislop struct ccw1 *ccw; 531552898025SNigel Hislop char psf0, psf1; 5316ab1d848fSNigel Hislop int rc; 5317ab1d848fSNigel Hislop 531852898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 531952898025SNigel Hislop return -EACCES; 532052898025SNigel Hislop psf0 = psf1 = 0; 532152898025SNigel Hislop 5322ab1d848fSNigel Hislop /* Copy parms from caller */ 5323ab1d848fSNigel Hislop rc = -EFAULT; 5324ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5325ab1d848fSNigel Hislop goto out; 532692d62891SHeiko Carstens if (is_compat_task()) { 5327ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5328ab1d848fSNigel Hislop rc = -EINVAL; 5329f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5330ab1d848fSNigel Hislop goto out; 5331f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5332f8b06859SHeiko Carstens goto out; 5333f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5334f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5335ab1d848fSNigel Hislop } 53364a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 53374a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 53384a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 53394a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 53404a8ef699SStefan Haberland usrparm.psf_data_len); 53414a8ef699SStefan Haberland rc = -EINVAL; 53424a8ef699SStefan Haberland goto out; 53434a8ef699SStefan Haberland } 5344ab1d848fSNigel Hislop /* alloc I/O data area */ 5345ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5346ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5347ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5348ab1d848fSNigel Hislop rc = -ENOMEM; 5349ab1d848fSNigel Hislop goto out_free; 5350ab1d848fSNigel Hislop } 5351ab1d848fSNigel Hislop 5352ab1d848fSNigel Hislop /* get syscall header from user space */ 5353ab1d848fSNigel Hislop rc = -EFAULT; 5354ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5355ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5356ab1d848fSNigel Hislop usrparm.psf_data_len)) 5357ab1d848fSNigel Hislop goto out_free; 535852898025SNigel Hislop psf0 = psf_data[0]; 535952898025SNigel Hislop psf1 = psf_data[1]; 5360ab1d848fSNigel Hislop 5361ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5362c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5363ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5364fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5365ab1d848fSNigel Hislop "Could not allocate initialization request"); 5366ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5367ab1d848fSNigel Hislop goto out_free; 5368ab1d848fSNigel Hislop } 5369ab1d848fSNigel Hislop 5370ab1d848fSNigel Hislop cqr->startdev = device; 5371ab1d848fSNigel Hislop cqr->memdev = device; 5372ab1d848fSNigel Hislop cqr->retries = 3; 5373ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 53741aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5375ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5376ab1d848fSNigel Hislop 5377ab1d848fSNigel Hislop /* Build the ccws */ 5378ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5379ab1d848fSNigel Hislop 5380ab1d848fSNigel Hislop /* PSF ccw */ 5381ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5382ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5383ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5384ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 5385ab1d848fSNigel Hislop 5386ab1d848fSNigel Hislop ccw++; 5387ab1d848fSNigel Hislop 5388ab1d848fSNigel Hislop /* RSSD ccw */ 5389ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5390ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5391ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5392ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 5393ab1d848fSNigel Hislop 5394ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5395ab1d848fSNigel Hislop if (rc) 5396ab1d848fSNigel Hislop goto out_sfree; 5397ab1d848fSNigel Hislop 5398ab1d848fSNigel Hislop rc = -EFAULT; 5399ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5400ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5401ab1d848fSNigel Hislop goto out_sfree; 5402ab1d848fSNigel Hislop rc = 0; 5403ab1d848fSNigel Hislop 5404ab1d848fSNigel Hislop out_sfree: 5405ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5406ab1d848fSNigel Hislop out_free: 5407ab1d848fSNigel Hislop kfree(rssd_result); 5408ab1d848fSNigel Hislop kfree(psf_data); 5409ab1d848fSNigel Hislop out: 541052898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 541152898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 541252898025SNigel Hislop (int) psf0, (int) psf1, rc); 5413ab1d848fSNigel Hislop return rc; 5414ab1d848fSNigel Hislop } 5415ab1d848fSNigel Hislop 54161107ccfbSChristoph Hellwig static int 54178e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 54181107ccfbSChristoph Hellwig { 54198e09f215SStefan Weinhuber struct dasd_device *device = block->base; 54208e09f215SStefan Weinhuber 54211107ccfbSChristoph Hellwig switch (cmd) { 54221107ccfbSChristoph Hellwig case BIODASDGATTR: 54231107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 54241107ccfbSChristoph Hellwig case BIODASDSATTR: 54251107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 54261107ccfbSChristoph Hellwig case BIODASDPSRD: 54271107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 54281107ccfbSChristoph Hellwig case BIODASDRLSE: 54291107ccfbSChristoph Hellwig return dasd_eckd_release(device); 54301107ccfbSChristoph Hellwig case BIODASDRSRV: 54311107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 54321107ccfbSChristoph Hellwig case BIODASDSLCK: 54331107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5434196339f1SStefan Weinhuber case BIODASDSNID: 5435196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5436ab1d848fSNigel Hislop case BIODASDSYMMIO: 5437ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 54381107ccfbSChristoph Hellwig default: 54396b79d14eSHeiko Carstens return -ENOTTY; 54401107ccfbSChristoph Hellwig } 54411107ccfbSChristoph Hellwig } 54421107ccfbSChristoph Hellwig 54431da177e4SLinus Torvalds /* 5444445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5445445b5b49SHorst Hummel * and return number of printed chars. 5446445b5b49SHorst Hummel */ 54474d284cacSHeiko Carstens static int 5448445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5449445b5b49SHorst Hummel { 5450445b5b49SHorst Hummel int len, count; 5451445b5b49SHorst Hummel char *datap; 5452445b5b49SHorst Hummel 5453445b5b49SHorst Hummel len = 0; 5454445b5b49SHorst Hummel while (from <= to) { 5455773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5456445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5457445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5458445b5b49SHorst Hummel 5459445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5460445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5461445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 5462445b5b49SHorst Hummel else 5463445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 5464445b5b49SHorst Hummel 5465445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 5466445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 5467445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 5468445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 5469445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5470445b5b49SHorst Hummel } 5471445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5472445b5b49SHorst Hummel from++; 5473445b5b49SHorst Hummel } 5474445b5b49SHorst Hummel return len; 5475445b5b49SHorst Hummel } 5476445b5b49SHorst Hummel 5477fc19f381SStefan Haberland static void 5478aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5479aeec92caSStefan Haberland char *reason) 5480fc19f381SStefan Haberland { 5481fc19f381SStefan Haberland u64 *sense; 5482a5a0061fSStefan Weinhuber u64 *stat; 5483fc19f381SStefan Haberland 5484aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5485a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5486fc19f381SStefan Haberland if (sense) { 5487a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5488a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5489a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5490ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5491fc19f381SStefan Haberland } else { 5492a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5493a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5494a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5495fc19f381SStefan Haberland } 5496fc19f381SStefan Haberland } 5497fc19f381SStefan Haberland 5498445b5b49SHorst Hummel /* 54991da177e4SLinus Torvalds * Print sense data and related channel program. 55001da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 55011da177e4SLinus Torvalds */ 5502f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 55038e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 55041da177e4SLinus Torvalds { 55051da177e4SLinus Torvalds char *page; 5506445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5507445b5b49SHorst Hummel int len, sl, sct; 55081da177e4SLinus Torvalds 55091da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 55101da177e4SLinus Torvalds if (page == NULL) { 5511fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5512fc19f381SStefan Haberland "No memory to dump sense data\n"); 55131da177e4SLinus Torvalds return; 55141da177e4SLinus Torvalds } 5515445b5b49SHorst Hummel /* dump the sense data */ 5516773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 55171da177e4SLinus Torvalds " I/O status report for device %s:\n", 55182a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5519773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5520a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5521a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5522a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5523a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5524a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5525a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5526773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55271da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 55282a0217d5SKay Sievers dev_name(&device->cdev->dev), 552923d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 55301da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 55311da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5532773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55331da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 55341da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 55351da177e4SLinus Torvalds 55361da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 55371da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 55381da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 55391da177e4SLinus Torvalds } 55401da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 55411da177e4SLinus Torvalds } 55421da177e4SLinus Torvalds 55431da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 55441da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5545773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55461da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 55471da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 55481da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 55491da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 55501da177e4SLinus Torvalds } else { 55511da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5552773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55531da177e4SLinus Torvalds " 32 Byte: Format: %x " 55541da177e4SLinus Torvalds "Exception class %x\n", 55551da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 55561da177e4SLinus Torvalds } 55571da177e4SLinus Torvalds } else { 5558773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 55591da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 55601da177e4SLinus Torvalds } 5561773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55621da177e4SLinus Torvalds 55638e09f215SStefan Weinhuber if (req) { 55648e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5565445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5566445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5567445b5b49SHorst Hummel first = req->cpaddr; 5568445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5569445b5b49SHorst Hummel to = min(first + 6, last); 5570773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 55711da177e4SLinus Torvalds " Related CP in req: %p\n", req); 5572445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 5573773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55741da177e4SLinus Torvalds 5575445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5576445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 55771da177e4SLinus Torvalds len = 0; 5578445b5b49SHorst Hummel from = ++to; 557923d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 558023d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5581445b5b49SHorst Hummel if (from < fail - 2) { 5582445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5583773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 55841da177e4SLinus Torvalds } 5585445b5b49SHorst Hummel to = min(fail + 1, last); 5586445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 55871da177e4SLinus Torvalds 5588445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5589445b5b49SHorst Hummel from = max(from, ++to); 5590445b5b49SHorst Hummel if (from < last - 1) { 5591445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5592773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 55931da177e4SLinus Torvalds } 5594445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 55951da177e4SLinus Torvalds if (len > 0) 5596773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 55978e09f215SStefan Weinhuber } 55981da177e4SLinus Torvalds free_page((unsigned long) page); 55991da177e4SLinus Torvalds } 56001da177e4SLinus Torvalds 5601f3eb5384SStefan Weinhuber 5602f3eb5384SStefan Weinhuber /* 5603f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5604f3eb5384SStefan Weinhuber */ 5605f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5606f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5607f3eb5384SStefan Weinhuber { 5608f3eb5384SStefan Weinhuber char *page; 5609f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5610f3eb5384SStefan Weinhuber struct tsb *tsb; 5611ef19298bSStefan Weinhuber u8 *sense, *rcq; 5612f3eb5384SStefan Weinhuber 5613f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5614f3eb5384SStefan Weinhuber if (page == NULL) { 5615fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5616f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5617f3eb5384SStefan Weinhuber return; 5618f3eb5384SStefan Weinhuber } 5619f3eb5384SStefan Weinhuber /* dump the sense data */ 5620773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5621f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5622f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5623773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5624a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5625a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5626a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5627a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5628a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5629a521b048SStefan Haberland irb->scsw.tm.fcxs, 5630a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5631a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5632773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5633f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5634f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5635f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5636f3eb5384SStefan Weinhuber 5637f3eb5384SStefan Weinhuber tsb = NULL; 5638f3eb5384SStefan Weinhuber sense = NULL; 5639a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5640f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5641f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5642f3eb5384SStefan Weinhuber 5643b8fde722SStefan Haberland if (tsb) { 5644773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5645f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5646773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5647f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5648773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5649f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5650773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5651f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5652f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5653773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5654f3eb5384SStefan Weinhuber " residual %d\n", residual); 5655f3eb5384SStefan Weinhuber 5656f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5657f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5658773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5659f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5660f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5661773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5662f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5663f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5664773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5665f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5666f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5667773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5668f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5669f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5670773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5671f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5672f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5673f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5674f3eb5384SStefan Weinhuber break; 5675f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5676773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5677f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5678ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5679773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5680ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5681ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5682ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5683f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5684f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5685ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5686f3eb5384SStefan Weinhuber } 5687f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5688f3eb5384SStefan Weinhuber } 5689f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5690f3eb5384SStefan Weinhuber break; 5691f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5692773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 56938693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5694f3eb5384SStefan Weinhuber break; 5695f3eb5384SStefan Weinhuber } 5696f3eb5384SStefan Weinhuber 5697f3eb5384SStefan Weinhuber if (sense) { 5698f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5699773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5700f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5701f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5702f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5703f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5704f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5705f3eb5384SStefan Weinhuber } 5706f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5707f3eb5384SStefan Weinhuber } 5708f3eb5384SStefan Weinhuber 5709f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5710f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5711773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5712f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5713f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5714f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5715f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5716f3eb5384SStefan Weinhuber } else { 5717f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5718773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5719f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5720f3eb5384SStefan Weinhuber "Exception class %x\n", 5721f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5722f3eb5384SStefan Weinhuber } 5723f3eb5384SStefan Weinhuber } else { 5724773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5725f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5726f3eb5384SStefan Weinhuber } 5727f3eb5384SStefan Weinhuber } else { 5728773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5729f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5730f3eb5384SStefan Weinhuber } 5731773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5732f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5733f3eb5384SStefan Weinhuber } 5734f3eb5384SStefan Weinhuber 5735f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5736f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5737f3eb5384SStefan Weinhuber { 57388fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 57398fd57520SJan Höppner 57408fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 57418fd57520SJan Höppner /* 57428fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 57438fd57520SJan Höppner * error might be expected and log messages shouldn't be written 57448fd57520SJan Höppner * then. Check if the according suppress bit is set. 57458fd57520SJan Höppner */ 57468fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 57478fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 57488fd57520SJan Höppner return; 57498fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 57508fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 57518fd57520SJan Höppner return; 57528fd57520SJan Höppner 5753f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 57548fd57520SJan Höppner } else { 57558fd57520SJan Höppner /* 5756ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5757ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5758ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 57598fd57520SJan Höppner */ 5760ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5761ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5762ab24fbd3SStefan Haberland return; 5763ab24fbd3SStefan Haberland 57648fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 57658fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 57668fd57520SJan Höppner return; 57678fd57520SJan Höppner 5768f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5769f3eb5384SStefan Weinhuber } 57708fd57520SJan Höppner } 5771f3eb5384SStefan Weinhuber 5772501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 5773d41dd122SStefan Haberland { 5774d41dd122SStefan Haberland /* 5775d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 5776d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 5777d41dd122SStefan Haberland * information like PAV support that might have changed 5778d41dd122SStefan Haberland */ 5779d41dd122SStefan Haberland dasd_alias_remove_device(device); 5780d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5781d41dd122SStefan Haberland 5782d41dd122SStefan Haberland return 0; 5783d41dd122SStefan Haberland } 5784d41dd122SStefan Haberland 5785501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 5786d41dd122SStefan Haberland { 5787543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 57886fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 5789f9f8d02fSStefan Haberland int rc; 5790d41dd122SStefan Haberland struct dasd_uid temp_uid; 5791a7602f6cSStefan Haberland unsigned long flags; 5792ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 5793d41dd122SStefan Haberland 5794d41dd122SStefan Haberland /* Read Configuration Data */ 5795251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5796251afd69SStefan Haberland if (rc) { 5797251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5798251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5799251afd69SStefan Haberland goto out_err; 5800251afd69SStefan Haberland } 5801d41dd122SStefan Haberland 58022dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 58032dedf0d9SStefan Haberland /* Generate device unique id */ 58042dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 58052dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5806d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 5807a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 5808a7602f6cSStefan Haberland "changed\n"); 58092dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5810d41dd122SStefan Haberland if (rc) 5811d41dd122SStefan Haberland goto out_err; 5812d41dd122SStefan Haberland 5813d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 5814f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 5815f9f8d02fSStefan Haberland if (rc) 5816251afd69SStefan Haberland goto out_err; 5817ea4da6eaSStefan Haberland 5818ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 5819ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 5820f4ac1d02SStefan Weinhuber 5821f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 5822251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5823251afd69SStefan Haberland if (rc) { 5824251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5825251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5826251afd69SStefan Haberland goto out_err2; 5827251afd69SStefan Haberland } 5828d41dd122SStefan Haberland 5829d41dd122SStefan Haberland /* Read Feature Codes */ 583068d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 5831d41dd122SStefan Haberland 5832c729696bSJan Höppner /* Read Volume Information */ 5833dd454839SJan Höppner dasd_eckd_read_vol_info(device); 5834c729696bSJan Höppner 5835c729696bSJan Höppner /* Read Extent Pool Information */ 5836dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 5837c729696bSJan Höppner 5838d41dd122SStefan Haberland /* Read Device Characteristics */ 583968b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 58406fca97a9SStefan Haberland &temp_rdc_data, 64); 5841d41dd122SStefan Haberland if (rc) { 5842b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5843b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 5844251afd69SStefan Haberland goto out_err2; 5845d41dd122SStefan Haberland } 5846a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 58476fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5848a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5849d41dd122SStefan Haberland 5850d41dd122SStefan Haberland /* add device to alias management */ 5851d41dd122SStefan Haberland dasd_alias_add_device(device); 5852d41dd122SStefan Haberland 5853d41dd122SStefan Haberland return 0; 5854d41dd122SStefan Haberland 5855251afd69SStefan Haberland out_err2: 5856251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5857d41dd122SStefan Haberland out_err: 5858e6125fbaSStefan Haberland return -1; 5859d41dd122SStefan Haberland } 5860d41dd122SStefan Haberland 5861501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5862501183f2SStefan Haberland { 5863543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5864501183f2SStefan Haberland int rc, old_base; 58652dedf0d9SStefan Haberland char print_uid[60]; 58662dedf0d9SStefan Haberland struct dasd_uid uid; 58672dedf0d9SStefan Haberland unsigned long flags; 5868501183f2SStefan Haberland 586959a9ed5fSStefan Haberland /* 587059a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 587159a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 587259a9ed5fSStefan Haberland */ 587359a9ed5fSStefan Haberland dasd_alias_remove_device(device); 587459a9ed5fSStefan Haberland 58752dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5876501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 58772dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 58782dedf0d9SStefan Haberland 5879501183f2SStefan Haberland /* Read Configuration Data */ 5880501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5881501183f2SStefan Haberland if (rc) 5882501183f2SStefan Haberland goto out_err; 5883501183f2SStefan Haberland 58842dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5885501183f2SStefan Haberland if (rc) 5886501183f2SStefan Haberland goto out_err; 5887501183f2SStefan Haberland /* 5888501183f2SStefan Haberland * update unit address configuration and 5889501183f2SStefan Haberland * add device to alias management 5890501183f2SStefan Haberland */ 5891501183f2SStefan Haberland dasd_alias_update_add_device(device); 5892501183f2SStefan Haberland 58932dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 58942dedf0d9SStefan Haberland 58952dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 58962dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 58972dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 58982dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 58992dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5900501183f2SStefan Haberland else 59012dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 59022dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 59032dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5904501183f2SStefan Haberland 5905501183f2SStefan Haberland dev_info(&device->cdev->dev, 5906501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 59072dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5908501183f2SStefan Haberland } 5909501183f2SStefan Haberland return 0; 5910501183f2SStefan Haberland 5911501183f2SStefan Haberland out_err: 5912501183f2SStefan Haberland return -1; 5913501183f2SStefan Haberland } 5914501183f2SStefan Haberland 59155db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 59165db8440cSStefan Haberland struct dasd_rssd_messages *messages, 59175db8440cSStefan Haberland __u8 lpum) 59185db8440cSStefan Haberland { 59195db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 59205db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 59215db8440cSStefan Haberland struct dasd_ccw_req *cqr; 59225db8440cSStefan Haberland struct ccw1 *ccw; 59235db8440cSStefan Haberland int rc; 59245db8440cSStefan Haberland 59255db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 59265db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 59275db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5928c5205f2fSSebastian Ott device, NULL); 59295db8440cSStefan Haberland if (IS_ERR(cqr)) { 59305db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59315db8440cSStefan Haberland "Could not allocate read message buffer request"); 59325db8440cSStefan Haberland return PTR_ERR(cqr); 59335db8440cSStefan Haberland } 59345db8440cSStefan Haberland 5935af775210SStefan Haberland cqr->lpm = lpum; 5936af775210SStefan Haberland retry: 59375db8440cSStefan Haberland cqr->startdev = device; 59385db8440cSStefan Haberland cqr->memdev = device; 59395db8440cSStefan Haberland cqr->block = NULL; 59405db8440cSStefan Haberland cqr->expires = 10 * HZ; 59415db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5942b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5943b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5944b179b037SStefan Haberland * do basic erp */ 5945b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5946b179b037SStefan Haberland cqr->retries = 256; 59475db8440cSStefan Haberland 59485db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 59495db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59505db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 59515db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 59525db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 59535db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 59545db8440cSStefan Haberland 59555db8440cSStefan Haberland ccw = cqr->cpaddr; 59565db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59575db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 59585db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 59595db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59605db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 59615db8440cSStefan Haberland 59625db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 59635db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 59645db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 59655db8440cSStefan Haberland 59665db8440cSStefan Haberland ccw++; 59675db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 59685db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 59695db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 59705db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 59715db8440cSStefan Haberland 59725db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 59735db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 59745db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 59755db8440cSStefan Haberland if (rc == 0) { 59765db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 59775db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 59785db8440cSStefan Haberland (prssdp + 1); 59795db8440cSStefan Haberland memcpy(messages, message_buf, 59805db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5981af775210SStefan Haberland } else if (cqr->lpm) { 5982af775210SStefan Haberland /* 5983af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5984af775210SStefan Haberland * but instead we get the required information on any path 5985af775210SStefan Haberland * so retry with open path mask 5986af775210SStefan Haberland */ 5987af775210SStefan Haberland cqr->lpm = 0; 5988af775210SStefan Haberland goto retry; 59895db8440cSStefan Haberland } else 59905db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 59915db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 59925db8440cSStefan Haberland , rc); 59935db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59945db8440cSStefan Haberland return rc; 59955db8440cSStefan Haberland } 59965db8440cSStefan Haberland 59975a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 59985a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 59995a3b7b11SStefan Haberland { 60005a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 60015a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 60025a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 60035a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 60045a3b7b11SStefan Haberland struct ccw1 *ccw; 60055a3b7b11SStefan Haberland int rc; 60065a3b7b11SStefan Haberland 60075a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 60085a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 60095a3b7b11SStefan Haberland return -EOPNOTSUPP; 60105a3b7b11SStefan Haberland 6011ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 6012ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 6013ccd53fa2SStefan Haberland return -EOPNOTSUPP; 6014ccd53fa2SStefan Haberland 60155a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 60165a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 6017c5205f2fSSebastian Ott device, NULL); 60185a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 60195a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60205a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 60215a3b7b11SStefan Haberland return PTR_ERR(cqr); 60225a3b7b11SStefan Haberland } 60235a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 60245a3b7b11SStefan Haberland if (!host_access) { 60255a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 60265a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60275a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 60285a3b7b11SStefan Haberland return -ENOMEM; 60295a3b7b11SStefan Haberland } 60305a3b7b11SStefan Haberland cqr->startdev = device; 60315a3b7b11SStefan Haberland cqr->memdev = device; 60325a3b7b11SStefan Haberland cqr->block = NULL; 60335a3b7b11SStefan Haberland cqr->retries = 256; 60345a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 60355a3b7b11SStefan Haberland 60365a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 60375a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 60385a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 60395a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 60405a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 60415a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 60425a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 60435a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 60445a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 60455a3b7b11SStefan Haberland 60465a3b7b11SStefan Haberland ccw = cqr->cpaddr; 60475a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 60485a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 60495a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 60505a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 60515a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 60525a3b7b11SStefan Haberland 60535a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 60545a3b7b11SStefan Haberland ccw++; 60555a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 60565a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 60575a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 60585a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 60595a3b7b11SStefan Haberland 60605a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 60615a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 6062ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 6063ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 6064f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 60655a3b7b11SStefan Haberland if (rc == 0) { 60665a3b7b11SStefan Haberland *data = *host_access; 60675a3b7b11SStefan Haberland } else { 60685a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 60695a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 60705a3b7b11SStefan Haberland rc); 60715a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 60725a3b7b11SStefan Haberland } 60735a3b7b11SStefan Haberland 60745a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 60755a3b7b11SStefan Haberland kfree(host_access); 60765a3b7b11SStefan Haberland return rc; 60775a3b7b11SStefan Haberland } 60785a3b7b11SStefan Haberland /* 60795a3b7b11SStefan Haberland * return number of grouped devices 60805a3b7b11SStefan Haberland */ 60815a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 60825a3b7b11SStefan Haberland { 60835a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 60845a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 60855a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 60865a3b7b11SStefan Haberland int count = 0; 60875a3b7b11SStefan Haberland int rc, i; 60885a3b7b11SStefan Haberland 60895a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 60905a3b7b11SStefan Haberland if (!access) { 60915a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 60925a3b7b11SStefan Haberland "Could not allocate access buffer"); 60935a3b7b11SStefan Haberland return -ENOMEM; 60945a3b7b11SStefan Haberland } 60955a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 60965a3b7b11SStefan Haberland if (rc) { 60975a3b7b11SStefan Haberland kfree(access); 60985a3b7b11SStefan Haberland return rc; 60995a3b7b11SStefan Haberland } 61005a3b7b11SStefan Haberland 61015a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 61025a3b7b11SStefan Haberland access->host_access_information; 61035a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 61045a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 61055a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 61065a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 61075a3b7b11SStefan Haberland count++; 61085a3b7b11SStefan Haberland } 61095a3b7b11SStefan Haberland 61105a3b7b11SStefan Haberland kfree(access); 61115a3b7b11SStefan Haberland return count; 61125a3b7b11SStefan Haberland } 61135a3b7b11SStefan Haberland 61145a3b7b11SStefan Haberland /* 61155a3b7b11SStefan Haberland * write host access information to a sequential file 61165a3b7b11SStefan Haberland */ 61175a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 61185a3b7b11SStefan Haberland { 61195a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 61205a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 61215a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 61225a3b7b11SStefan Haberland char sysplex[9] = ""; 6123c7848e14SChristophe JAILLET int rc, i; 61245a3b7b11SStefan Haberland 61255a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 61265a3b7b11SStefan Haberland if (!access) { 61275a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 61285a3b7b11SStefan Haberland "Could not allocate access buffer"); 61295a3b7b11SStefan Haberland return -ENOMEM; 61305a3b7b11SStefan Haberland } 61315a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 61325a3b7b11SStefan Haberland if (rc) { 61335a3b7b11SStefan Haberland kfree(access); 61345a3b7b11SStefan Haberland return rc; 61355a3b7b11SStefan Haberland } 61365a3b7b11SStefan Haberland 61375a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 61385a3b7b11SStefan Haberland access->host_access_information; 61395a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 61405a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 61415a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 61425a3b7b11SStefan Haberland /* PGID */ 6143c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 61445a3b7b11SStefan Haberland /* FLAGS */ 61455a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 61465a3b7b11SStefan Haberland /* SYSPLEX NAME */ 61475a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 61485a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 61495a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 61505a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 61515a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 61525a3b7b11SStefan Haberland /* TIMESTAMP */ 61535a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 61545a3b7b11SStefan Haberland entry->timestamp); 61555a3b7b11SStefan Haberland } 61565a3b7b11SStefan Haberland kfree(access); 61575a3b7b11SStefan Haberland 61585a3b7b11SStefan Haberland return 0; 61595a3b7b11SStefan Haberland } 61605a3b7b11SStefan Haberland 61615db8440cSStefan Haberland /* 61625db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 61635db8440cSStefan Haberland */ 61645db8440cSStefan Haberland static int 61655db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 6166a521b048SStefan Haberland __u32 message_id, __u8 lpum) 61675db8440cSStefan Haberland { 61685db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 6169a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 61705db8440cSStefan Haberland struct dasd_ccw_req *cqr; 61715db8440cSStefan Haberland struct ccw1 *ccw; 61725db8440cSStefan Haberland int rc; 61735db8440cSStefan Haberland 61745db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 61755db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 6176c5205f2fSSebastian Ott device, NULL); 61775db8440cSStefan Haberland 61785db8440cSStefan Haberland if (IS_ERR(cqr)) { 61795db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 61805db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 61815db8440cSStefan Haberland return PTR_ERR(cqr); 61825db8440cSStefan Haberland } 61835db8440cSStefan Haberland 61845db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 61855db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 61865db8440cSStefan Haberland psf_cuir->cc = response; 6187a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 61885db8440cSStefan Haberland psf_cuir->message_id = message_id; 6189a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 6190a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 61915db8440cSStefan Haberland ccw = cqr->cpaddr; 61925db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 61935db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 6194b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 61955db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 61965db8440cSStefan Haberland 61975db8440cSStefan Haberland cqr->startdev = device; 61985db8440cSStefan Haberland cqr->memdev = device; 61995db8440cSStefan Haberland cqr->block = NULL; 62005db8440cSStefan Haberland cqr->retries = 256; 62015db8440cSStefan Haberland cqr->expires = 10*HZ; 62025db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 62035db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 6204b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 62055db8440cSStefan Haberland 62065db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 62075db8440cSStefan Haberland 62085db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 62095db8440cSStefan Haberland return rc; 62105db8440cSStefan Haberland } 62115db8440cSStefan Haberland 6212b179b037SStefan Haberland /* 6213b179b037SStefan Haberland * return configuration data that is referenced by record selector 6214b179b037SStefan Haberland * if a record selector is specified or per default return the 6215b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 6216b179b037SStefan Haberland */ 6217b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6218b179b037SStefan Haberland __u8 lpum, 6219b179b037SStefan Haberland struct dasd_cuir_message *cuir) 62205db8440cSStefan Haberland { 6221b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6222b179b037SStefan Haberland int path, pos; 62235db8440cSStefan Haberland 6224b179b037SStefan Haberland if (cuir->record_selector == 0) 6225b179b037SStefan Haberland goto out; 6226b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6227c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 6228b179b037SStefan Haberland if (conf_data->gneq.record_selector == 6229b179b037SStefan Haberland cuir->record_selector) 6230b179b037SStefan Haberland return conf_data; 62315db8440cSStefan Haberland } 6232b179b037SStefan Haberland out: 6233c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 62345db8440cSStefan Haberland } 62355db8440cSStefan Haberland 62365db8440cSStefan Haberland /* 6237b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6238b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6239b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6240b179b037SStefan Haberland * 6241b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6242b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6243b179b037SStefan Haberland * on. 6244b179b037SStefan Haberland */ 6245b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6246b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6247b179b037SStefan Haberland { 6248b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6249b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6250b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6251b179b037SStefan Haberland unsigned int pos, path; 6252b179b037SStefan Haberland char *ref_gneq, *gneq; 6253b179b037SStefan Haberland char *ref_ned, *ned; 6254b179b037SStefan Haberland int tbcpm = 0; 6255b179b037SStefan Haberland 6256b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6257b179b037SStefan Haberland the attention message was presented on */ 6258b179b037SStefan Haberland if (!cuir->ned_map || 6259b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6260b179b037SStefan Haberland return lpum; 6261b179b037SStefan Haberland 6262b179b037SStefan Haberland /* get reference conf data */ 6263b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6264b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6265b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6266b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6267b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6268b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6269b179b037SStefan Haberland mask = cuir->neq_map[2]; 6270b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6271b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6272b179b037SStefan Haberland 6273c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6274b179b037SStefan Haberland /* initialise data per path */ 6275b179b037SStefan Haberland bitmask = mask; 6276c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6277b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6278b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6279b179b037SStefan Haberland /* compare reference ned and per path ned */ 6280b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6281b179b037SStefan Haberland continue; 6282b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6283b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6284b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6285b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6286b179b037SStefan Haberland while (bitmask) { 6287b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6288b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6289b179b037SStefan Haberland != 0) 6290b179b037SStefan Haberland break; 6291b179b037SStefan Haberland clear_bit(pos, &bitmask); 6292b179b037SStefan Haberland } 6293b179b037SStefan Haberland if (bitmask) 6294b179b037SStefan Haberland continue; 6295b179b037SStefan Haberland /* device and path match the reference values 6296b179b037SStefan Haberland add path to CUIR scope */ 6297c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6298b179b037SStefan Haberland } 6299b179b037SStefan Haberland return tbcpm; 6300b179b037SStefan Haberland } 6301b179b037SStefan Haberland 6302b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6303a521b048SStefan Haberland unsigned long paths, int action) 6304b179b037SStefan Haberland { 6305b179b037SStefan Haberland int pos; 6306b179b037SStefan Haberland 6307b179b037SStefan Haberland while (paths) { 6308b179b037SStefan Haberland /* get position of bit in mask */ 6309a521b048SStefan Haberland pos = 8 - ffs(paths); 6310b179b037SStefan Haberland /* get channel path descriptor from this position */ 6311b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6312a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6313a521b048SStefan Haberland device->path[pos].cssid, 6314a521b048SStefan Haberland device->path[pos].chpid); 6315b179b037SStefan Haberland else if (action == CUIR_RESUME) 6316a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6317a521b048SStefan Haberland device->path[pos].cssid, 6318a521b048SStefan Haberland device->path[pos].chpid); 6319a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6320b179b037SStefan Haberland } 6321b179b037SStefan Haberland } 6322b179b037SStefan Haberland 6323b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6324b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6325b179b037SStefan Haberland { 6326b179b037SStefan Haberland unsigned long tbcpm; 6327b179b037SStefan Haberland 6328b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6329b179b037SStefan Haberland /* nothing to do if path is not in use */ 6330c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6331b179b037SStefan Haberland return 0; 6332c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6333b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6334b179b037SStefan Haberland return error */ 6335b179b037SStefan Haberland return -EINVAL; 6336b179b037SStefan Haberland } 6337b179b037SStefan Haberland /* remove device from operational path mask */ 6338c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6339c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6340b179b037SStefan Haberland return tbcpm; 6341b179b037SStefan Haberland } 6342b179b037SStefan Haberland 6343b179b037SStefan Haberland /* 6344b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6345b179b037SStefan Haberland * return an error if the last path to a device would be removed 63465db8440cSStefan Haberland * 63475db8440cSStefan Haberland * if only part of the devices are quiesced and an error 63485db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 63495db8440cSStefan Haberland * notify the already set offline devices again 63505db8440cSStefan Haberland */ 63515db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6352b179b037SStefan Haberland struct dasd_cuir_message *cuir) 63535db8440cSStefan Haberland { 6354543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 63555db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 63565db8440cSStefan Haberland struct dasd_device *dev, *n; 6357b179b037SStefan Haberland unsigned long paths = 0; 6358b179b037SStefan Haberland unsigned long flags; 6359b179b037SStefan Haberland int tbcpm; 63605db8440cSStefan Haberland 63615db8440cSStefan Haberland /* active devices */ 6362b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 63635db8440cSStefan Haberland alias_list) { 6364b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6365b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6366b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6367b179b037SStefan Haberland if (tbcpm < 0) 6368b179b037SStefan Haberland goto out_err; 6369b179b037SStefan Haberland paths |= tbcpm; 63705db8440cSStefan Haberland } 63715db8440cSStefan Haberland /* inactive devices */ 6372b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 63735db8440cSStefan Haberland alias_list) { 6374b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6375b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6376b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6377b179b037SStefan Haberland if (tbcpm < 0) 6378b179b037SStefan Haberland goto out_err; 6379b179b037SStefan Haberland paths |= tbcpm; 63805db8440cSStefan Haberland } 63815db8440cSStefan Haberland /* devices in PAV groups */ 63825db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 63835db8440cSStefan Haberland &private->lcu->grouplist, group) { 63845db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 63855db8440cSStefan Haberland alias_list) { 6386b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6387b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6388b179b037SStefan Haberland spin_unlock_irqrestore( 6389b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6390b179b037SStefan Haberland if (tbcpm < 0) 6391b179b037SStefan Haberland goto out_err; 6392b179b037SStefan Haberland paths |= tbcpm; 63935db8440cSStefan Haberland } 63945db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 63955db8440cSStefan Haberland alias_list) { 6396b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6397b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6398b179b037SStefan Haberland spin_unlock_irqrestore( 6399b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6400b179b037SStefan Haberland if (tbcpm < 0) 6401b179b037SStefan Haberland goto out_err; 6402b179b037SStefan Haberland paths |= tbcpm; 64035db8440cSStefan Haberland } 64045db8440cSStefan Haberland } 6405b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6406a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6407b179b037SStefan Haberland return 0; 6408b179b037SStefan Haberland out_err: 6409b179b037SStefan Haberland return tbcpm; 64105db8440cSStefan Haberland } 64115db8440cSStefan Haberland 64125db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6413b179b037SStefan Haberland struct dasd_cuir_message *cuir) 64145db8440cSStefan Haberland { 6415543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 64165db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 64175db8440cSStefan Haberland struct dasd_device *dev, *n; 6418b179b037SStefan Haberland unsigned long paths = 0; 6419b179b037SStefan Haberland int tbcpm; 64205db8440cSStefan Haberland 64215db8440cSStefan Haberland /* 64225db8440cSStefan Haberland * the path may have been added through a generic path event before 64235db8440cSStefan Haberland * only trigger path verification if the path is not already in use 64245db8440cSStefan Haberland */ 64255db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 64265db8440cSStefan Haberland &private->lcu->active_devices, 64275db8440cSStefan Haberland alias_list) { 6428b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6429b179b037SStefan Haberland paths |= tbcpm; 6430c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6431c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 64325db8440cSStefan Haberland dasd_schedule_device_bh(dev); 64335db8440cSStefan Haberland } 64345db8440cSStefan Haberland } 64355db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 64365db8440cSStefan Haberland &private->lcu->inactive_devices, 64375db8440cSStefan Haberland alias_list) { 6438b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6439b179b037SStefan Haberland paths |= tbcpm; 6440c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6441c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 64425db8440cSStefan Haberland dasd_schedule_device_bh(dev); 64435db8440cSStefan Haberland } 64445db8440cSStefan Haberland } 64455db8440cSStefan Haberland /* devices in PAV groups */ 64465db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 64475db8440cSStefan Haberland &private->lcu->grouplist, 64485db8440cSStefan Haberland group) { 64495db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 64505db8440cSStefan Haberland &pavgroup->baselist, 64515db8440cSStefan Haberland alias_list) { 6452b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6453b179b037SStefan Haberland paths |= tbcpm; 6454c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6455c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 64565db8440cSStefan Haberland dasd_schedule_device_bh(dev); 64575db8440cSStefan Haberland } 64585db8440cSStefan Haberland } 64595db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 64605db8440cSStefan Haberland &pavgroup->aliaslist, 64615db8440cSStefan Haberland alias_list) { 6462b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6463b179b037SStefan Haberland paths |= tbcpm; 6464c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6465c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 64665db8440cSStefan Haberland dasd_schedule_device_bh(dev); 64675db8440cSStefan Haberland } 64685db8440cSStefan Haberland } 64695db8440cSStefan Haberland } 6470b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6471a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6472b179b037SStefan Haberland return 0; 64735db8440cSStefan Haberland } 64745db8440cSStefan Haberland 64755db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 64765db8440cSStefan Haberland __u8 lpum) 64775db8440cSStefan Haberland { 64785db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6479a521b048SStefan Haberland int response; 64805db8440cSStefan Haberland 6481b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6482b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6483b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6484b179b037SStefan Haberland ((u32 *)cuir)[3]); 64855db8440cSStefan Haberland 64865db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 64875db8440cSStefan Haberland /* quiesce */ 6488a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6489b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6490b179b037SStefan Haberland else 6491b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 64925db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 64935db8440cSStefan Haberland /* resume */ 6494a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6495b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 64965db8440cSStefan Haberland } else 64975db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 64985db8440cSStefan Haberland 6499b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6500a521b048SStefan Haberland cuir->message_id, lpum); 6501b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6502b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6503b179b037SStefan Haberland cuir->message_id); 6504b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6505b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 65065db8440cSStefan Haberland } 65075db8440cSStefan Haberland 65089e12e54cSJan Höppner static void dasd_eckd_oos_resume(struct dasd_device *device) 65099e12e54cSJan Höppner { 65109e12e54cSJan Höppner struct dasd_eckd_private *private = device->private; 65119e12e54cSJan Höppner struct alias_pav_group *pavgroup, *tempgroup; 65129e12e54cSJan Höppner struct dasd_device *dev, *n; 65139e12e54cSJan Höppner unsigned long flags; 65149e12e54cSJan Höppner 65159e12e54cSJan Höppner spin_lock_irqsave(&private->lcu->lock, flags); 65169e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 65179e12e54cSJan Höppner alias_list) { 65189e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 65199e12e54cSJan Höppner dasd_generic_space_avail(dev); 65209e12e54cSJan Höppner } 65219e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 65229e12e54cSJan Höppner alias_list) { 65239e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 65249e12e54cSJan Höppner dasd_generic_space_avail(dev); 65259e12e54cSJan Höppner } 65269e12e54cSJan Höppner /* devices in PAV groups */ 65279e12e54cSJan Höppner list_for_each_entry_safe(pavgroup, tempgroup, 65289e12e54cSJan Höppner &private->lcu->grouplist, 65299e12e54cSJan Höppner group) { 65309e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->baselist, 65319e12e54cSJan Höppner alias_list) { 65329e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 65339e12e54cSJan Höppner dasd_generic_space_avail(dev); 65349e12e54cSJan Höppner } 65359e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 65369e12e54cSJan Höppner alias_list) { 65379e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 65389e12e54cSJan Höppner dasd_generic_space_avail(dev); 65399e12e54cSJan Höppner } 65409e12e54cSJan Höppner } 65419e12e54cSJan Höppner spin_unlock_irqrestore(&private->lcu->lock, flags); 65429e12e54cSJan Höppner } 65439e12e54cSJan Höppner 65449e12e54cSJan Höppner static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 65459e12e54cSJan Höppner __u8 lpum) 65469e12e54cSJan Höppner { 65479e12e54cSJan Höppner struct dasd_oos_message *oos = messages; 65489e12e54cSJan Höppner 65499e12e54cSJan Höppner switch (oos->code) { 65509e12e54cSJan Höppner case REPO_WARN: 65519e12e54cSJan Höppner case POOL_WARN: 65529e12e54cSJan Höppner dev_warn(&device->cdev->dev, 65539e12e54cSJan Höppner "Extent pool usage has reached a critical value\n"); 65549e12e54cSJan Höppner dasd_eckd_oos_resume(device); 65559e12e54cSJan Höppner break; 65569e12e54cSJan Höppner case REPO_EXHAUST: 65579e12e54cSJan Höppner case POOL_EXHAUST: 65589e12e54cSJan Höppner dev_warn(&device->cdev->dev, 65599e12e54cSJan Höppner "Extent pool is exhausted\n"); 65609e12e54cSJan Höppner break; 65619e12e54cSJan Höppner case REPO_RELIEVE: 65629e12e54cSJan Höppner case POOL_RELIEVE: 65639e12e54cSJan Höppner dev_info(&device->cdev->dev, 65649e12e54cSJan Höppner "Extent pool physical space constraint has been relieved\n"); 65659e12e54cSJan Höppner break; 65669e12e54cSJan Höppner } 65679e12e54cSJan Höppner 65689e12e54cSJan Höppner /* In any case, update related data */ 65699e12e54cSJan Höppner dasd_eckd_read_ext_pool_info(device); 65709e12e54cSJan Höppner 65719e12e54cSJan Höppner /* to make sure there is no attention left schedule work again */ 65729e12e54cSJan Höppner device->discipline->check_attention(device, lpum); 65739e12e54cSJan Höppner } 65749e12e54cSJan Höppner 65755db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 65765db8440cSStefan Haberland { 65775db8440cSStefan Haberland struct check_attention_work_data *data; 65785db8440cSStefan Haberland struct dasd_rssd_messages *messages; 65795db8440cSStefan Haberland struct dasd_device *device; 65805db8440cSStefan Haberland int rc; 65815db8440cSStefan Haberland 65825db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 65835db8440cSStefan Haberland device = data->device; 65845db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 65855db8440cSStefan Haberland if (!messages) { 65865db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 65875db8440cSStefan Haberland "Could not allocate attention message buffer"); 65885db8440cSStefan Haberland goto out; 65895db8440cSStefan Haberland } 65905db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 65915db8440cSStefan Haberland if (rc) 65925db8440cSStefan Haberland goto out; 65939e12e54cSJan Höppner 65945db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 65955db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 65965db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 65979e12e54cSJan Höppner if (messages->length == ATTENTION_LENGTH_OOS && 65989e12e54cSJan Höppner messages->format == ATTENTION_FORMAT_OOS) 65999e12e54cSJan Höppner dasd_eckd_handle_oos(device, messages, data->lpum); 66009e12e54cSJan Höppner 66015db8440cSStefan Haberland out: 66025db8440cSStefan Haberland dasd_put_device(device); 66035db8440cSStefan Haberland kfree(messages); 66045db8440cSStefan Haberland kfree(data); 66055db8440cSStefan Haberland } 66065db8440cSStefan Haberland 66075db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 66085db8440cSStefan Haberland { 66095db8440cSStefan Haberland struct check_attention_work_data *data; 66105db8440cSStefan Haberland 66115db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 66125db8440cSStefan Haberland if (!data) 66135db8440cSStefan Haberland return -ENOMEM; 66145db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 66155db8440cSStefan Haberland dasd_get_device(device); 66165db8440cSStefan Haberland data->device = device; 66175db8440cSStefan Haberland data->lpum = lpum; 66185db8440cSStefan Haberland schedule_work(&data->worker); 66195db8440cSStefan Haberland return 0; 66205db8440cSStefan Haberland } 66215db8440cSStefan Haberland 6622a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6623a521b048SStefan Haberland { 6624a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6625a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6626a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6627a521b048SStefan Haberland dev_err(&device->cdev->dev, 6628a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6629a521b048SStefan Haberland lpum); 6630a521b048SStefan Haberland return 1; 6631a521b048SStefan Haberland } 6632a521b048SStefan Haberland return 0; 6633a521b048SStefan Haberland } 6634a521b048SStefan Haberland 6635a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6636a521b048SStefan Haberland { 6637a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6638a521b048SStefan Haberland 6639a521b048SStefan Haberland dev_err(&device->cdev->dev, 6640a521b048SStefan Haberland "High Performance FICON disabled\n"); 6641a521b048SStefan Haberland private->fcx_max_data = 0; 6642a521b048SStefan Haberland } 6643a521b048SStefan Haberland 6644a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6645a521b048SStefan Haberland { 6646a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6647a521b048SStefan Haberland 6648a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6649a521b048SStefan Haberland } 6650a521b048SStefan Haberland 6651a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6652a521b048SStefan Haberland struct irb *irb) 6653a521b048SStefan Haberland { 6654a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6655a521b048SStefan Haberland 6656a521b048SStefan Haberland if (!private->fcx_max_data) { 6657a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6658a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6659a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6660a521b048SStefan Haberland return; 6661a521b048SStefan Haberland } 6662a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6663a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6664a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6665a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6666a521b048SStefan Haberland return; 6667a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6668a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6669a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6670a521b048SStefan Haberland } 6671a521b048SStefan Haberland /* 6672a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6673a521b048SStefan Haberland * requeue of existing requests 6674a521b048SStefan Haberland */ 6675a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6676a521b048SStefan Haberland dasd_schedule_requeue(device); 6677a521b048SStefan Haberland } 6678a521b048SStefan Haberland 6679a0610a8aSJan Höppner /* 6680a0610a8aSJan Höppner * Initialize block layer request queue. 6681a0610a8aSJan Höppner */ 6682a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6683a0610a8aSJan Höppner { 6684a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6685a0610a8aSJan Höppner struct request_queue *q = block->request_queue; 6686a0610a8aSJan Höppner struct dasd_device *device = block->base; 6687a0610a8aSJan Höppner int max; 6688a0610a8aSJan Höppner 6689a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6690a0610a8aSJan Höppner /* 6691a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6692a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6693a0610a8aSJan Höppner * only need one ccw per track 6694a0610a8aSJan Höppner * so the max_hw_sectors are 6695a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6696a0610a8aSJan Höppner */ 6697a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6698a0610a8aSJan Höppner } else { 6699a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6700a0610a8aSJan Höppner } 6701a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6702a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6703a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6704a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6705a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6706a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6707a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6708a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6709a0610a8aSJan Höppner } 6710a0610a8aSJan Höppner 6711d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 67123bda058bSSebastian Ott .driver = { 6713d41dd122SStefan Haberland .name = "dasd-eckd", 6714d41dd122SStefan Haberland .owner = THIS_MODULE, 67153bda058bSSebastian Ott }, 6716d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6717d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6718d41dd122SStefan Haberland .remove = dasd_generic_remove, 6719d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6720d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6721d41dd122SStefan Haberland .notify = dasd_generic_notify, 6722a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 67234679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6724d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 6725d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 6726d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 6727a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6728420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6729d41dd122SStefan Haberland }; 6730f3eb5384SStefan Weinhuber 67311da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 67321da177e4SLinus Torvalds .owner = THIS_MODULE, 67331da177e4SLinus Torvalds .name = "ECKD", 67341da177e4SLinus Torvalds .ebcname = "ECKD", 67351da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 67368e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 67371da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6738*b7294932SJan Höppner .pe_handler = dasd_eckd_pe_handler, 6739d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 67408e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6741daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6742a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 67431da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 67441da177e4SLinus Torvalds .start_IO = dasd_start_IO, 67451da177e4SLinus Torvalds .term_IO = dasd_term_IO, 67468e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 67471da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 67488fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 67491da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 67501da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 67515a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 67528e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 67538e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 67541da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6755fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 67561da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 67571107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6758d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 6759d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 6760501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 67612dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6762f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 67635db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 67645a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 67655a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6766a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6767a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6768a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6769a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6770c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6771c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6772c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6773c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 677491dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6775c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6776c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6777c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6778c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6779c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 67809e12e54cSJan Höppner .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 67815e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 67825e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 67831da177e4SLinus Torvalds }; 67841da177e4SLinus Torvalds 67851da177e4SLinus Torvalds static int __init 67861da177e4SLinus Torvalds dasd_eckd_init(void) 67871da177e4SLinus Torvalds { 6788736e6ea0SSebastian Ott int ret; 6789736e6ea0SSebastian Ott 67901da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6791f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6792f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6793f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6794f932bceaSStefan Weinhuber return -ENOMEM; 67959e12e54cSJan Höppner dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 67969e12e54cSJan Höppner GFP_KERNEL | GFP_DMA); 67979e12e54cSJan Höppner if (!dasd_vol_info_req) 67989e12e54cSJan Höppner return -ENOMEM; 6799*b7294932SJan Höppner pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), 6800a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6801*b7294932SJan Höppner if (!pe_handler_worker) { 6802a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 68039e12e54cSJan Höppner kfree(dasd_vol_info_req); 6804a4d26c6aSStefan Weinhuber return -ENOMEM; 6805a4d26c6aSStefan Weinhuber } 6806558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6807558b9ef0SStefan Weinhuber if (!rawpadpage) { 6808*b7294932SJan Höppner kfree(pe_handler_worker); 6809558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 68109e12e54cSJan Höppner kfree(dasd_vol_info_req); 6811558b9ef0SStefan Weinhuber return -ENOMEM; 6812558b9ef0SStefan Weinhuber } 6813736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6814736e6ea0SSebastian Ott if (!ret) 6815736e6ea0SSebastian Ott wait_for_device_probe(); 6816a4d26c6aSStefan Weinhuber else { 6817*b7294932SJan Höppner kfree(pe_handler_worker); 6818f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 68199e12e54cSJan Höppner kfree(dasd_vol_info_req); 6820558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6821a4d26c6aSStefan Weinhuber } 6822736e6ea0SSebastian Ott return ret; 68231da177e4SLinus Torvalds } 68241da177e4SLinus Torvalds 68251da177e4SLinus Torvalds static void __exit 68261da177e4SLinus Torvalds dasd_eckd_cleanup(void) 68271da177e4SLinus Torvalds { 68281da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6829*b7294932SJan Höppner kfree(pe_handler_worker); 6830f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6831558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 68321da177e4SLinus Torvalds } 68331da177e4SLinus Torvalds 68341da177e4SLinus Torvalds module_init(dasd_eckd_init); 68351da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6836