16a55d2cdSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 51da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 61da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 71da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 8d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 9ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 13ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 14fc19f381SStefan Haberland 151da177e4SLinus Torvalds #include <linux/stddef.h> 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 191da177e4SLinus Torvalds #include <linux/bio.h> 201da177e4SLinus Torvalds #include <linux/module.h> 21048cd4e5SHeiko Carstens #include <linux/compat.h> 221da177e4SLinus Torvalds #include <linux/init.h> 235a3b7b11SStefan Haberland #include <linux/seq_file.h> 241da177e4SLinus Torvalds 25382b7366SSebastian Ott #include <asm/css_chars.h> 261da177e4SLinus Torvalds #include <asm/debug.h> 271da177e4SLinus Torvalds #include <asm/idals.h> 281da177e4SLinus Torvalds #include <asm/ebcdic.h> 291da177e4SLinus Torvalds #include <asm/io.h> 307c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 3140545573SHorst Hummel #include <asm/cio.h> 321da177e4SLinus Torvalds #include <asm/ccwdev.h> 33f3eb5384SStefan Weinhuber #include <asm/itcw.h> 345db8440cSStefan Haberland #include <asm/schid.h> 355db8440cSStefan Haberland #include <asm/chpid.h> 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include "dasd_int.h" 381da177e4SLinus Torvalds #include "dasd_eckd.h" 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #ifdef PRINTK_HEADER 411da177e4SLinus Torvalds #undef PRINTK_HEADER 421da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 431da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 441da177e4SLinus Torvalds 45e4dbb0f2SStefan Haberland /* 46e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 47e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 48e4dbb0f2SStefan Haberland */ 49e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 50e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 51e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 52e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 53e4dbb0f2SStefan Haberland 541da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 591da177e4SLinus Torvalds * dasd_eckd_probe */ 601da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 61d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 62d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 635da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 64d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 65d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 66d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 67d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 68d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 69d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 70d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 711da177e4SLinus Torvalds { /* end of list */ }, 721da177e4SLinus Torvalds }; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 771da177e4SLinus Torvalds 78558b9ef0SStefan Weinhuber static void *rawpadpage; 79558b9ef0SStefan Weinhuber 80eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 81eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 82eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 83eb6e199bSStefan Weinhuber 84f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 85f932bceaSStefan Weinhuber static struct { 86f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 87f932bceaSStefan Weinhuber struct ccw1 ccw; 88f932bceaSStefan Weinhuber char data[32]; 89f932bceaSStefan Weinhuber } *dasd_reserve_req; 90f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 91f932bceaSStefan Weinhuber 929e12e54cSJan Höppner static struct { 939e12e54cSJan Höppner struct dasd_ccw_req cqr; 949e12e54cSJan Höppner struct ccw1 ccw[2]; 959e12e54cSJan Höppner char data[40]; 969e12e54cSJan Höppner } *dasd_vol_info_req; 979e12e54cSJan Höppner static DEFINE_MUTEX(dasd_vol_info_mutex); 989e12e54cSJan Höppner 999e12e54cSJan Höppner struct ext_pool_exhaust_work_data { 1009e12e54cSJan Höppner struct work_struct worker; 1019e12e54cSJan Höppner struct dasd_device *device; 1029e12e54cSJan Höppner struct dasd_device *base; 1039e12e54cSJan Höppner }; 1049e12e54cSJan Höppner 105a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 106a4d26c6aSStefan Weinhuber struct path_verification_work_data { 107a4d26c6aSStefan Weinhuber struct work_struct worker; 108a4d26c6aSStefan Weinhuber struct dasd_device *device; 109a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 110a4d26c6aSStefan Weinhuber struct ccw1 ccw; 111a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112a4d26c6aSStefan Weinhuber int isglobal; 113a4d26c6aSStefan Weinhuber __u8 tbvpm; 114a4d26c6aSStefan Weinhuber }; 115a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 116a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 117eb6e199bSStefan Weinhuber 1185db8440cSStefan Haberland struct check_attention_work_data { 1195db8440cSStefan Haberland struct work_struct worker; 1205db8440cSStefan Haberland struct dasd_device *device; 1215db8440cSStefan Haberland __u8 lpum; 1225db8440cSStefan Haberland }; 1235db8440cSStefan Haberland 124c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *); 1258fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1268fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1278fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1288fd57520SJan Höppner unsigned int, unsigned int); 1298fd57520SJan Höppner 1301da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1311da177e4SLinus Torvalds * the other detection code is gone */ 1321da177e4SLinus Torvalds static int 1331da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds int ret; 1361da177e4SLinus Torvalds 13740545573SHorst Hummel /* set ECKD specific ccw-device options */ 138454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 139454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 14040545573SHorst Hummel if (ret) { 141b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 142b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 143b8ed5dd5SStefan Haberland "ccw-device options"); 1441da177e4SLinus Torvalds return ret; 14540545573SHorst Hummel } 14640545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 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 2105628683cSStefan Haberland static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 2111da177e4SLinus Torvalds struct dasd_device *device) 2121da177e4SLinus Torvalds { 213543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 214d54853efSMartin Schwidefsky int rc; 2151da177e4SLinus Torvalds 2165628683cSStefan Haberland rc = get_phys_clock(&data->ep_sys_time); 2175628683cSStefan Haberland /* 2185628683cSStefan Haberland * Ignore return code if XRC is not supported or 2195628683cSStefan Haberland * sync clock is switched off 2205628683cSStefan Haberland */ 2215628683cSStefan Haberland if ((rc && !private->rdc_data.facilities.XRC_supported) || 2225628683cSStefan Haberland rc == -EOPNOTSUPP || rc == -EACCES) 223d54853efSMartin Schwidefsky return 0; 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2261da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2271da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2281da177e4SLinus Torvalds 22945f186beSJan Höppner if (ccw) { 23045f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 23145f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 23245f186beSJan Höppner } 23345f186beSJan Höppner 234d54853efSMartin Schwidefsky return rc; 2351da177e4SLinus Torvalds } 2361da177e4SLinus Torvalds 2374d284cacSHeiko Carstens static int 238b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 23945f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 24045f186beSJan Höppner int blksize) 2411da177e4SLinus Torvalds { 242543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 243b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 24445f186beSJan Höppner u32 begcyl, endcyl; 245d54853efSMartin Schwidefsky int rc = 0; 2461da177e4SLinus Torvalds 24745f186beSJan Höppner if (ccw) { 2481da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2491da177e4SLinus Torvalds ccw->flags = 0; 2501da177e4SLinus Torvalds ccw->count = 16; 2511da177e4SLinus Torvalds ccw->cda = (__u32)__pa(data); 25245f186beSJan Höppner } 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2551da177e4SLinus Torvalds switch (cmd) { 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2641da177e4SLinus Torvalds data->mask.perm = 0x1; 2651da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2661da177e4SLinus Torvalds break; 2678fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 2688fd57520SJan Höppner data->mask.perm = 0x1; 2698fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 2708fd57520SJan Höppner break; 27145f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 27245f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 27345f186beSJan Höppner data->mask.perm = 0x1; 27445f186beSJan Höppner data->attributes.operation = private->attrib.operation; 27545f186beSJan Höppner data->blk_size = 0; 27645f186beSJan Höppner break; 2771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2801da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2811da177e4SLinus Torvalds data->mask.perm = 0x02; 2821da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2835628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2841da177e4SLinus Torvalds break; 2851da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2861da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2871da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2885628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2891da177e4SLinus Torvalds break; 2901da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2911da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2921da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2931da177e4SLinus Torvalds data->mask.perm = 0x3; 2941da177e4SLinus Torvalds data->mask.auth = 0x1; 2951da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2965628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2971da177e4SLinus Torvalds break; 29845f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 29945f186beSJan Höppner data->mask.perm = 0x03; 30045f186beSJan Höppner data->attributes.operation = private->attrib.operation; 30145f186beSJan Höppner data->blk_size = 0; 30245f186beSJan Höppner break; 30345f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 30445f186beSJan Höppner data->mask.perm = 0x02; 30545f186beSJan Höppner data->attributes.operation = private->attrib.operation; 30645f186beSJan Höppner data->blk_size = blksize; 3075628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 30845f186beSJan Höppner break; 3091da177e4SLinus Torvalds default: 310fc19f381SStefan Haberland dev_err(&device->cdev->dev, 311fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 3121da177e4SLinus Torvalds break; 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3181da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3191da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3201da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3211da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3221da177e4SLinus Torvalds 323b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 324b44b0ab3SStefan Weinhuber begcyl = trk / heads; 325b44b0ab3SStefan Weinhuber beghead = trk % heads; 326b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 327b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3301da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3311da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3321da177e4SLinus Torvalds 333b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 334b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3351da177e4SLinus Torvalds else 336b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3371da177e4SLinus Torvalds } 3381da177e4SLinus Torvalds 339b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 340b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 341d54853efSMartin Schwidefsky return rc; 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3448e09f215SStefan Weinhuber 34545f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 34645f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 34745f186beSJan Höppner int count, int cmd, struct dasd_device *device, 34845f186beSJan Höppner unsigned int reclen, unsigned int tlf) 349f3eb5384SStefan Weinhuber { 350543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 351f3eb5384SStefan Weinhuber int sector; 352f3eb5384SStefan Weinhuber int dn, d; 353f3eb5384SStefan Weinhuber 35445f186beSJan Höppner if (ccw) { 35545f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 35645f186beSJan Höppner ccw->flags = 0; 35745f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 35845f186beSJan Höppner ccw->count = 22; 35945f186beSJan Höppner else 36045f186beSJan Höppner ccw->count = 20; 36145f186beSJan Höppner ccw->cda = (__u32)__pa(data); 36245f186beSJan Höppner } 36345f186beSJan Höppner 364f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 365f3eb5384SStefan Weinhuber sector = 0; 366f3eb5384SStefan Weinhuber if (rec_on_trk) { 367f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 368f3eb5384SStefan Weinhuber case 0x3390: 369f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 370f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 371f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 372f3eb5384SStefan Weinhuber break; 373f3eb5384SStefan Weinhuber case 0x3380: 374f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 375f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 376f3eb5384SStefan Weinhuber break; 377f3eb5384SStefan Weinhuber } 378f3eb5384SStefan Weinhuber } 379f3eb5384SStefan Weinhuber data->sector = sector; 380f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 381f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 382f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 383f3eb5384SStefan Weinhuber */ 384f3eb5384SStefan Weinhuber data->count = count; 385f3eb5384SStefan Weinhuber switch (cmd) { 386f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 387f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 388f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 389f3eb5384SStefan Weinhuber break; 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 391f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 392f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 393f3eb5384SStefan Weinhuber break; 394f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 395f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 396f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 397f3eb5384SStefan Weinhuber data->count++; 398f3eb5384SStefan Weinhuber break; 399f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 400f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 401f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 402f3eb5384SStefan Weinhuber data->count++; 403f3eb5384SStefan Weinhuber break; 404f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 405f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 406f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 407f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 408f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 409f3eb5384SStefan Weinhuber data->length = reclen; 410f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 411f3eb5384SStefan Weinhuber break; 412f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 413f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 414f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 415f3eb5384SStefan Weinhuber data->length = reclen; 416f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 417f3eb5384SStefan Weinhuber break; 418e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 419e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 420e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 421e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 422e4dbb0f2SStefan Haberland data->length = 0; 423e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 424e4dbb0f2SStefan Haberland if (data->count > 8) { 425e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 426e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 427e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 428e4dbb0f2SStefan Haberland } else { 429e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 430e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 431e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 432e4dbb0f2SStefan Haberland } 433e4dbb0f2SStefan Haberland data->sector = 0xFF; 434e4dbb0f2SStefan Haberland break; 435f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 436f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 437f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 438f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 439f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 440f3eb5384SStefan Weinhuber break; 441f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 442f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 443f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 444f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 445f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 446f3eb5384SStefan Weinhuber data->length = reclen; 447f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 448f3eb5384SStefan Weinhuber break; 449f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 450f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 451f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 452f3eb5384SStefan Weinhuber data->length = reclen; 453f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 454f3eb5384SStefan Weinhuber break; 455f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 456f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 457f3eb5384SStefan Weinhuber break; 458e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 459e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 460e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 461e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 462e4dbb0f2SStefan Haberland data->sector = 0xFF; 463e4dbb0f2SStefan Haberland break; 464f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 465f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 466f3eb5384SStefan Weinhuber data->length = tlf; 467f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 468f3eb5384SStefan Weinhuber break; 469f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 470f3eb5384SStefan Weinhuber data->length = reclen; 471f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 472f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 473f3eb5384SStefan Weinhuber break; 474f3eb5384SStefan Weinhuber default: 475f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 476f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 477f3eb5384SStefan Weinhuber BUG(); 478f3eb5384SStefan Weinhuber } 479f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 480f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 481f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 482f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 483f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 484f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 485f3eb5384SStefan Weinhuber } 486f3eb5384SStefan Weinhuber 487f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 488b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 489f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 49045f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 491f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4928e09f215SStefan Weinhuber { 4938e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 494f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 49545f186beSJan Höppner struct DE_eckd_data *dedata; 4968e09f215SStefan Weinhuber int rc = 0; 4978e09f215SStefan Weinhuber 498543691a4SSebastian Ott basepriv = basedev->private; 499543691a4SSebastian Ott startpriv = startdev->private; 500f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 501f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 5028e09f215SStefan Weinhuber 5038e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5048e09f215SStefan Weinhuber ccw->flags = 0; 505e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 506e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 507e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 508e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 509e4dbb0f2SStefan Haberland } else { 5108e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5118e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5128e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 513e4dbb0f2SStefan Haberland } 514e4dbb0f2SStefan Haberland 5158e09f215SStefan Weinhuber /* prefix data */ 516f3eb5384SStefan Weinhuber if (format > 1) { 517f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 518f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 519f3eb5384SStefan Weinhuber BUG(); 520f3eb5384SStefan Weinhuber return -EINVAL; 521f3eb5384SStefan Weinhuber } 522f3eb5384SStefan Weinhuber pfxdata->format = format; 5234abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5244abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 525f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5268e09f215SStefan Weinhuber 5278e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 528da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 5298e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 530da340f92SStefan Haberland 531da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 532da340f92SStefan Haberland pfxdata->validity.verify_base = 1; 5338e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5348e09f215SStefan Weinhuber } 5358e09f215SStefan Weinhuber 53645f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5378e09f215SStefan Weinhuber 53845f186beSJan Höppner /* 53945f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 54045f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 54145f186beSJan Höppner * reflected in the prefix data as well. 54245f186beSJan Höppner */ 54345f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 54445f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 545f3eb5384SStefan Weinhuber 546f3eb5384SStefan Weinhuber if (format == 1) { 54745f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 548f3eb5384SStefan Weinhuber basedev, blksize, tlf); 549f3eb5384SStefan Weinhuber } 550f3eb5384SStefan Weinhuber 5518e09f215SStefan Weinhuber return rc; 5528e09f215SStefan Weinhuber } 5538e09f215SStefan Weinhuber 554f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 555f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 556f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 557f3eb5384SStefan Weinhuber { 558f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 559f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 560f3eb5384SStefan Weinhuber } 561f3eb5384SStefan Weinhuber 5624d284cacSHeiko Carstens static void 563b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 564b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5651da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5661da177e4SLinus Torvalds { 567543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5681da177e4SLinus Torvalds int sector; 5691da177e4SLinus Torvalds int dn, d; 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5721da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5731da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5761da177e4SLinus Torvalds ccw->flags = 0; 5771da177e4SLinus Torvalds ccw->count = 16; 5781da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5811da177e4SLinus Torvalds sector = 0; 5821da177e4SLinus Torvalds if (rec_on_trk) { 5831da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5841da177e4SLinus Torvalds case 0x3390: 5851da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5861da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 5871da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 5881da177e4SLinus Torvalds break; 5891da177e4SLinus Torvalds case 0x3380: 5901da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 5911da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 5921da177e4SLinus Torvalds break; 5931da177e4SLinus Torvalds } 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds data->sector = sector; 5961da177e4SLinus Torvalds data->count = no_rec; 5971da177e4SLinus Torvalds switch (cmd) { 5981da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5991da177e4SLinus Torvalds data->operation.orientation = 0x3; 6001da177e4SLinus Torvalds data->operation.operation = 0x03; 6011da177e4SLinus Torvalds break; 6021da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6031da177e4SLinus Torvalds data->operation.orientation = 0x3; 6041da177e4SLinus Torvalds data->operation.operation = 0x16; 6051da177e4SLinus Torvalds break; 6061da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6071da177e4SLinus Torvalds data->operation.orientation = 0x1; 6081da177e4SLinus Torvalds data->operation.operation = 0x03; 6091da177e4SLinus Torvalds data->count++; 6101da177e4SLinus Torvalds break; 6111da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6121da177e4SLinus Torvalds data->operation.orientation = 0x3; 6131da177e4SLinus Torvalds data->operation.operation = 0x16; 6141da177e4SLinus Torvalds data->count++; 6151da177e4SLinus Torvalds break; 6161da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6171da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6181da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6201da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6211da177e4SLinus Torvalds data->length = reclen; 6221da177e4SLinus Torvalds data->operation.operation = 0x01; 6231da177e4SLinus Torvalds break; 6241da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6261da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6271da177e4SLinus Torvalds data->length = reclen; 6281da177e4SLinus Torvalds data->operation.operation = 0x03; 6291da177e4SLinus Torvalds break; 6301da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6311da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6321da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6331da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6341da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6351da177e4SLinus Torvalds data->length = reclen; 6361da177e4SLinus Torvalds data->operation.operation = 0x06; 6371da177e4SLinus Torvalds break; 6381da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6391da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6401da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6411da177e4SLinus Torvalds data->length = reclen; 6421da177e4SLinus Torvalds data->operation.operation = 0x16; 6431da177e4SLinus Torvalds break; 6441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6451da177e4SLinus Torvalds data->operation.operation = 0x06; 6461da177e4SLinus Torvalds break; 6471da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6481da177e4SLinus Torvalds data->length = reclen; 6491da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6501da177e4SLinus Torvalds data->operation.operation = 0x0b; 6511da177e4SLinus Torvalds break; 6521da177e4SLinus Torvalds default: 653fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 654fc19f381SStefan Haberland "opcode 0x%x", cmd); 6551da177e4SLinus Torvalds } 656b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 657b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 658b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 659b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 660b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6611da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds 6641da177e4SLinus Torvalds /* 6651da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6661da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6671da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6681da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6691da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6701da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6711da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6721da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6731da177e4SLinus Torvalds */ 6741da177e4SLinus Torvalds static inline int 6751da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6761da177e4SLinus Torvalds { 6771da177e4SLinus Torvalds if (recid < 3) 6781da177e4SLinus Torvalds return 1; 6791da177e4SLinus Torvalds if (recid < blk_per_trk) 6801da177e4SLinus Torvalds return 0; 6811da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6821da177e4SLinus Torvalds return 1; 6831da177e4SLinus Torvalds return 0; 6841da177e4SLinus Torvalds } 6851da177e4SLinus Torvalds 6861da177e4SLinus Torvalds /* 6871da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 6881da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 6891da177e4SLinus Torvalds * for the recid. 6901da177e4SLinus Torvalds */ 6911da177e4SLinus Torvalds static inline int 6921da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 6931da177e4SLinus Torvalds { 6941da177e4SLinus Torvalds if (recid < 3) 6951da177e4SLinus Torvalds return sizes_trk0[recid]; 6961da177e4SLinus Torvalds return LABEL_SIZE; 6971da177e4SLinus Torvalds } 698b206181dSStefan Haberland /* create unique id from private structure. */ 699b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7003d052595SHorst Hummel { 7014abb08c2SStefan Weinhuber int count; 702b206181dSStefan Haberland struct dasd_uid *uid; 7033d052595SHorst Hummel 7042dedf0d9SStefan Haberland uid = &private->uid; 7053d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7064abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7073d052595SHorst Hummel sizeof(uid->vendor) - 1); 7083d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7094abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7103d052595SHorst Hummel sizeof(uid->serial) - 1); 7113d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7124abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 713a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7144abb08c2SStefan Weinhuber if (private->sneq) { 7154abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7168e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7174abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7188e09f215SStefan Weinhuber } else { 7198e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7208e09f215SStefan Weinhuber } 7214abb08c2SStefan Weinhuber if (private->vdsneq) { 7224abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7234abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7244abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7254abb08c2SStefan Weinhuber } 7264abb08c2SStefan Weinhuber } 727b206181dSStefan Haberland } 728b206181dSStefan Haberland 729b206181dSStefan Haberland /* 730b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 731b206181dSStefan Haberland */ 732b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 733b206181dSStefan Haberland { 734543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 735b206181dSStefan Haberland unsigned long flags; 736b206181dSStefan Haberland 737b206181dSStefan Haberland if (!private) 738b206181dSStefan Haberland return -ENODEV; 739b206181dSStefan Haberland if (!private->ned || !private->gneq) 740b206181dSStefan Haberland return -ENODEV; 741b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 742b206181dSStefan Haberland create_uid(private); 7432dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7443d052595SHorst Hummel return 0; 7453d052595SHorst Hummel } 7463d052595SHorst Hummel 7472dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7482dedf0d9SStefan Haberland { 749543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7502dedf0d9SStefan Haberland unsigned long flags; 7512dedf0d9SStefan Haberland 752543691a4SSebastian Ott if (private) { 7532dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7542dedf0d9SStefan Haberland *uid = private->uid; 7552dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7562dedf0d9SStefan Haberland return 0; 7572dedf0d9SStefan Haberland } 7582dedf0d9SStefan Haberland return -EINVAL; 7592dedf0d9SStefan Haberland } 7602dedf0d9SStefan Haberland 761b206181dSStefan Haberland /* 762b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 763b206181dSStefan Haberland * return 0 for match 764b206181dSStefan Haberland */ 765b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 766b206181dSStefan Haberland struct dasd_eckd_private *private) 767b206181dSStefan Haberland { 768b206181dSStefan Haberland struct dasd_uid device_uid; 769b206181dSStefan Haberland 770b206181dSStefan Haberland create_uid(private); 771b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 772b206181dSStefan Haberland 773b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 774b206181dSStefan Haberland } 775b206181dSStefan Haberland 776a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 777a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 778a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 779a4d26c6aSStefan Weinhuber __u8 lpm) 78017283b56SCornelia Huck { 78117283b56SCornelia Huck struct ccw1 *ccw; 782a4d26c6aSStefan Weinhuber /* 783a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 784a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 785a4d26c6aSStefan Weinhuber */ 786a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 787a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 788a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 789a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 79017283b56SCornelia Huck 79117283b56SCornelia Huck ccw = cqr->cpaddr; 792a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 793a4d26c6aSStefan Weinhuber ccw->flags = 0; 79417283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 795a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 796a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 79717283b56SCornelia Huck 7988e09f215SStefan Weinhuber cqr->startdev = device; 7998e09f215SStefan Weinhuber cqr->memdev = device; 8008e09f215SStefan Weinhuber cqr->block = NULL; 80117283b56SCornelia Huck cqr->expires = 10*HZ; 80217283b56SCornelia Huck cqr->lpm = lpm; 803eb6e199bSStefan Weinhuber cqr->retries = 256; 8041aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 80517283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 806a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 807a4d26c6aSStefan Weinhuber } 808a4d26c6aSStefan Weinhuber 8095915a873SStefan Haberland /* 8105915a873SStefan Haberland * Wakeup helper for read_conf 8115915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8125915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8135915a873SStefan Haberland * to show support for virtual device SNEQ 8145915a873SStefan Haberland */ 8155915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8165915a873SStefan Haberland { 8175915a873SStefan Haberland struct ccw1 *ccw; 8185915a873SStefan Haberland __u8 *rcd_buffer; 8195915a873SStefan Haberland 8205915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8215915a873SStefan Haberland ccw = cqr->cpaddr; 8225915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8235915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8245915a873SStefan Haberland 8255915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8265915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8275915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8285915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8295915a873SStefan Haberland } 8305915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8315915a873SStefan Haberland } 8325915a873SStefan Haberland 833a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 834a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 835a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 836a4d26c6aSStefan Weinhuber __u8 lpm) 837a4d26c6aSStefan Weinhuber { 838a4d26c6aSStefan Weinhuber struct ciw *ciw; 839a4d26c6aSStefan Weinhuber int rc; 840a4d26c6aSStefan Weinhuber /* 841a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 842a4d26c6aSStefan Weinhuber * some devices do not support RCD 843a4d26c6aSStefan Weinhuber */ 844a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 845a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 846a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 847a4d26c6aSStefan Weinhuber 848a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 849a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8505a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 851a4d26c6aSStefan Weinhuber cqr->retries = 5; 8525915a873SStefan Haberland cqr->callback = read_conf_cb; 853a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 854a4d26c6aSStefan Weinhuber return rc; 85517283b56SCornelia Huck } 85617283b56SCornelia Huck 85717283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 85817283b56SCornelia Huck void **rcd_buffer, 85917283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 86017283b56SCornelia Huck { 86117283b56SCornelia Huck struct ciw *ciw; 86217283b56SCornelia Huck char *rcd_buf = NULL; 86317283b56SCornelia Huck int ret; 86417283b56SCornelia Huck struct dasd_ccw_req *cqr; 86517283b56SCornelia Huck 86617283b56SCornelia Huck /* 867a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 868a4d26c6aSStefan Weinhuber * some devices do not support RCD 86917283b56SCornelia Huck */ 87017283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 871a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 87217283b56SCornelia Huck ret = -EOPNOTSUPP; 87317283b56SCornelia Huck goto out_error; 87417283b56SCornelia Huck } 875a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 87617283b56SCornelia Huck if (!rcd_buf) { 87717283b56SCornelia Huck ret = -ENOMEM; 87817283b56SCornelia Huck goto out_error; 87917283b56SCornelia Huck } 880a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 881a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 882c5205f2fSSebastian Ott device, NULL); 88317283b56SCornelia Huck if (IS_ERR(cqr)) { 884a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 885a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 886a4d26c6aSStefan Weinhuber ret = -ENOMEM; 88717283b56SCornelia Huck goto out_error; 88817283b56SCornelia Huck } 889a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 8905915a873SStefan Haberland cqr->callback = read_conf_cb; 89117283b56SCornelia Huck ret = dasd_sleep_on(cqr); 89217283b56SCornelia Huck /* 89317283b56SCornelia Huck * on success we update the user input parms 89417283b56SCornelia Huck */ 8958e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 89617283b56SCornelia Huck if (ret) 89717283b56SCornelia Huck goto out_error; 89817283b56SCornelia Huck 899a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 90017283b56SCornelia Huck *rcd_buffer = rcd_buf; 90117283b56SCornelia Huck return 0; 90217283b56SCornelia Huck out_error: 90317283b56SCornelia Huck kfree(rcd_buf); 90417283b56SCornelia Huck *rcd_buffer = NULL; 90517283b56SCornelia Huck *rcd_buffer_size = 0; 90617283b56SCornelia Huck return ret; 90717283b56SCornelia Huck } 90817283b56SCornelia Huck 9094abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9104abb08c2SStefan Weinhuber { 9114abb08c2SStefan Weinhuber 9124abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9134abb08c2SStefan Weinhuber int i, count; 9144abb08c2SStefan Weinhuber 9154abb08c2SStefan Weinhuber private->ned = NULL; 9164abb08c2SStefan Weinhuber private->sneq = NULL; 9174abb08c2SStefan Weinhuber private->vdsneq = NULL; 9184abb08c2SStefan Weinhuber private->gneq = NULL; 9194abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9204abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9214abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9224abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9234abb08c2SStefan Weinhuber private->sneq = sneq; 9244abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9254abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9264abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9274abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9284abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9294abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9304abb08c2SStefan Weinhuber sneq++; 9314abb08c2SStefan Weinhuber } 9324abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9334abb08c2SStefan Weinhuber private->ned = NULL; 9344abb08c2SStefan Weinhuber private->sneq = NULL; 9354abb08c2SStefan Weinhuber private->vdsneq = NULL; 9364abb08c2SStefan Weinhuber private->gneq = NULL; 9374abb08c2SStefan Weinhuber return -EINVAL; 9384abb08c2SStefan Weinhuber } 9394abb08c2SStefan Weinhuber return 0; 9404abb08c2SStefan Weinhuber 9414abb08c2SStefan Weinhuber }; 9424abb08c2SStefan Weinhuber 9434abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9444abb08c2SStefan Weinhuber { 9454abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9464abb08c2SStefan Weinhuber int i, count, found; 9474abb08c2SStefan Weinhuber 9484abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9494abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9504abb08c2SStefan Weinhuber found = 0; 9514abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9524abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9534abb08c2SStefan Weinhuber found = 1; 9544abb08c2SStefan Weinhuber break; 9554abb08c2SStefan Weinhuber } 9564abb08c2SStefan Weinhuber gneq++; 9574abb08c2SStefan Weinhuber } 9584abb08c2SStefan Weinhuber if (found) 9594abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9604abb08c2SStefan Weinhuber else 9614abb08c2SStefan Weinhuber return 0; 9624abb08c2SStefan Weinhuber } 9634abb08c2SStefan Weinhuber 964c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 965c7c0c9deSStefan Haberland { 966543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 967c7c0c9deSStefan Haberland int i; 968c7c0c9deSStefan Haberland 969c7c0c9deSStefan Haberland private->conf_data = NULL; 970c7c0c9deSStefan Haberland private->conf_len = 0; 971c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 972c9346151SStefan Haberland kfree(device->path[i].conf_data); 973c9346151SStefan Haberland device->path[i].conf_data = NULL; 974a521b048SStefan Haberland device->path[i].cssid = 0; 975a521b048SStefan Haberland device->path[i].ssid = 0; 976a521b048SStefan Haberland device->path[i].chpid = 0; 977c7c0c9deSStefan Haberland } 978c7c0c9deSStefan Haberland } 979c7c0c9deSStefan Haberland 980c7c0c9deSStefan Haberland 9814abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 9821da177e4SLinus Torvalds { 9831da177e4SLinus Torvalds void *conf_data; 9841da177e4SLinus Torvalds int conf_len, conf_data_saved; 985b179b037SStefan Haberland int rc, path_err, pos; 986a4d26c6aSStefan Weinhuber __u8 lpm, opm; 987b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 988b206181dSStefan Haberland struct dasd_uid *uid; 989b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 990ded27d8dSSebastian Ott struct channel_path_desc_fmt0 *chp_desc; 991a521b048SStefan Haberland struct subchannel_id sch_id; 9921da177e4SLinus Torvalds 993543691a4SSebastian Ott private = device->private; 994a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 995a521b048SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 9961da177e4SLinus Torvalds conf_data_saved = 0; 99755d3a85cSStefan Haberland path_err = 0; 9981da177e4SLinus Torvalds /* get configuration data per operational path */ 9991da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1000b206181dSStefan Haberland if (!(lpm & opm)) 1001b206181dSStefan Haberland continue; 100217283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10031da177e4SLinus Torvalds &conf_len, lpm); 10041da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1005b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10061da177e4SLinus Torvalds "Read configuration data returned " 1007b8ed5dd5SStefan Haberland "error %d", rc); 10081da177e4SLinus Torvalds return rc; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds if (conf_data == NULL) { 1011b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1012b8ed5dd5SStefan Haberland "No configuration data " 1013b8ed5dd5SStefan Haberland "retrieved"); 1014a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1015c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1016d133a960SGabriel Craciunescu continue; /* no error */ 10171da177e4SLinus Torvalds } 10181da177e4SLinus Torvalds /* save first valid configuration data */ 10191da177e4SLinus Torvalds if (!conf_data_saved) { 1020c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1021c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10224abb08c2SStefan Weinhuber private->conf_data = conf_data; 10234abb08c2SStefan Weinhuber private->conf_len = conf_len; 10244abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10254abb08c2SStefan Weinhuber private->conf_data = NULL; 10264abb08c2SStefan Weinhuber private->conf_len = 0; 10274abb08c2SStefan Weinhuber kfree(conf_data); 10284abb08c2SStefan Weinhuber continue; 10294abb08c2SStefan Weinhuber } 1030c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1031c7c0c9deSStefan Haberland /* store per path conf_data */ 1032c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1033a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1034a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1035a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1036a521b048SStefan Haberland if (chp_desc) 1037a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1038a521b048SStefan Haberland kfree(chp_desc); 1039b206181dSStefan Haberland /* 1040b206181dSStefan Haberland * build device UID that other path data 1041b206181dSStefan Haberland * can be compared to it 1042b206181dSStefan Haberland */ 1043b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10441da177e4SLinus Torvalds conf_data_saved++; 1045b206181dSStefan Haberland } else { 1046b206181dSStefan Haberland path_private.conf_data = conf_data; 1047b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1048b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1049b206181dSStefan Haberland &path_private)) { 1050b206181dSStefan Haberland path_private.conf_data = NULL; 1051b206181dSStefan Haberland path_private.conf_len = 0; 1052b206181dSStefan Haberland kfree(conf_data); 1053b206181dSStefan Haberland continue; 1054b206181dSStefan Haberland } 1055b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1056b206181dSStefan Haberland device, &path_private)) { 1057b206181dSStefan Haberland uid = &path_private.uid; 1058b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1059b206181dSStefan Haberland snprintf(print_path_uid, 1060b206181dSStefan Haberland sizeof(print_path_uid), 1061b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1062b206181dSStefan Haberland uid->vendor, uid->serial, 1063b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1064b206181dSStefan Haberland uid->vduit); 1065b206181dSStefan Haberland else 1066b206181dSStefan Haberland snprintf(print_path_uid, 1067b206181dSStefan Haberland sizeof(print_path_uid), 1068b206181dSStefan Haberland "%s.%s.%04x.%02x", 1069b206181dSStefan Haberland uid->vendor, uid->serial, 1070b206181dSStefan Haberland uid->ssid, 1071b206181dSStefan Haberland uid->real_unit_addr); 1072b206181dSStefan Haberland uid = &private->uid; 1073b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1074b206181dSStefan Haberland snprintf(print_device_uid, 1075b206181dSStefan Haberland sizeof(print_device_uid), 1076b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1077b206181dSStefan Haberland uid->vendor, uid->serial, 1078b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1079b206181dSStefan Haberland uid->vduit); 1080b206181dSStefan Haberland else 1081b206181dSStefan Haberland snprintf(print_device_uid, 1082b206181dSStefan Haberland sizeof(print_device_uid), 1083b206181dSStefan Haberland "%s.%s.%04x.%02x", 1084b206181dSStefan Haberland uid->vendor, uid->serial, 1085b206181dSStefan Haberland uid->ssid, 1086b206181dSStefan Haberland uid->real_unit_addr); 1087b206181dSStefan Haberland dev_err(&device->cdev->dev, 1088b206181dSStefan Haberland "Not all channel paths lead to " 1089b206181dSStefan Haberland "the same device, path %02X leads to " 1090b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1091b206181dSStefan Haberland print_path_uid, print_device_uid); 109255d3a85cSStefan Haberland path_err = -EINVAL; 1093c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 109455d3a85cSStefan Haberland continue; 1095b206181dSStefan Haberland } 1096c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1097c7c0c9deSStefan Haberland /* store per path conf_data */ 1098c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1099a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1100a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1101a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1102a521b048SStefan Haberland if (chp_desc) 1103a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1104a521b048SStefan Haberland kfree(chp_desc); 1105b206181dSStefan Haberland path_private.conf_data = NULL; 1106b206181dSStefan Haberland path_private.conf_len = 0; 11071da177e4SLinus Torvalds } 11084abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11091da177e4SLinus Torvalds case 0x02: 1110c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11111da177e4SLinus Torvalds break; 11121da177e4SLinus Torvalds case 0x03: 1113c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11141da177e4SLinus Torvalds break; 11151da177e4SLinus Torvalds } 1116c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1117c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1118ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1119ccc0e7dcSStefan Haberland } else { 1120c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1121ccc0e7dcSStefan Haberland } 11221da177e4SLinus Torvalds } 1123b206181dSStefan Haberland 112455d3a85cSStefan Haberland return path_err; 11251da177e4SLinus Torvalds } 11261da177e4SLinus Torvalds 1127a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1128a521b048SStefan Haberland { 1129a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1130a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1131dd4b3c83SJan Höppner unsigned int mdc; 1132dd4b3c83SJan Höppner int tpm; 1133a521b048SStefan Haberland 1134a521b048SStefan Haberland if (dasd_nofcx) 1135a521b048SStefan Haberland return 0; 1136a521b048SStefan Haberland /* is transport mode supported? */ 1137a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1138a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1139a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1140a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1141a521b048SStefan Haberland 1142a521b048SStefan Haberland if (!tpm) 1143a521b048SStefan Haberland return 0; 1144a521b048SStefan Haberland 1145a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1146dd4b3c83SJan Höppner if (mdc == 0) { 1147a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1148a521b048SStefan Haberland return 0; 1149a521b048SStefan Haberland } else { 1150a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1151a521b048SStefan Haberland } 1152a521b048SStefan Haberland } 1153a521b048SStefan Haberland 1154a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1155a4d26c6aSStefan Weinhuber { 1156543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1157dd4b3c83SJan Höppner unsigned int mdc; 1158a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1159a4d26c6aSStefan Weinhuber 1160a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1161a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1162dd4b3c83SJan Höppner if (mdc == 0) { 1163a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1164a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1165a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1166a4d26c6aSStefan Weinhuber mdc, lpm); 1167a4d26c6aSStefan Weinhuber return mdc; 1168a4d26c6aSStefan Weinhuber } 11690f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1170a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1171a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1172a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1173a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1174a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1175a4d26c6aSStefan Weinhuber private->fcx_max_data); 1176a4d26c6aSStefan Weinhuber return -EACCES; 1177a4d26c6aSStefan Weinhuber } 1178a4d26c6aSStefan Weinhuber } 1179a4d26c6aSStefan Weinhuber return 0; 1180a4d26c6aSStefan Weinhuber } 1181a4d26c6aSStefan Weinhuber 1182b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1183b206181dSStefan Haberland struct path_verification_work_data *data) 1184b206181dSStefan Haberland { 1185543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1186c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1187543691a4SSebastian Ott int rc = -ENODEV; 1188b206181dSStefan Haberland 1189b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1190b206181dSStefan Haberland if (!(lpm & opm)) 1191b206181dSStefan Haberland continue; 1192b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1193b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1194b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1195b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1196b206181dSStefan Haberland data->rcd_buffer, 1197b206181dSStefan Haberland lpm); 1198b206181dSStefan Haberland 1199b206181dSStefan Haberland if (rc) { 1200b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1201b206181dSStefan Haberland continue; 1202b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1203b206181dSStefan Haberland "Read configuration data " 1204b206181dSStefan Haberland "returned error %d", rc); 1205b206181dSStefan Haberland break; 1206b206181dSStefan Haberland } 1207b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1208b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1209b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1210b206181dSStefan Haberland rc = -ENODEV; 1211b206181dSStefan Haberland } else /* first valid path is enough */ 1212b206181dSStefan Haberland break; 1213b206181dSStefan Haberland } 1214b206181dSStefan Haberland 1215b206181dSStefan Haberland if (!rc) 1216b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1217b206181dSStefan Haberland 1218b206181dSStefan Haberland return rc; 1219b206181dSStefan Haberland } 1220b206181dSStefan Haberland 1221a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1222a4d26c6aSStefan Weinhuber { 1223a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1224a4d26c6aSStefan Weinhuber struct dasd_device *device; 1225b206181dSStefan Haberland struct dasd_eckd_private path_private; 1226b206181dSStefan Haberland struct dasd_uid *uid; 1227b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12285db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1229a4d26c6aSStefan Weinhuber unsigned long flags; 1230b206181dSStefan Haberland char print_uid[60]; 1231a4d26c6aSStefan Weinhuber int rc; 1232a4d26c6aSStefan Weinhuber 1233a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1234a4d26c6aSStefan Weinhuber device = data->device; 1235a4d26c6aSStefan Weinhuber 1236c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1237c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1238c8d1c0ffSStefan Haberland schedule_work(work); 1239c8d1c0ffSStefan Haberland return; 1240c8d1c0ffSStefan Haberland } 12411eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12421eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12431eb38023SStefan Haberland schedule_work(work); 12441eb38023SStefan Haberland return; 12451eb38023SStefan Haberland } 1246a4d26c6aSStefan Weinhuber opm = 0; 1247a4d26c6aSStefan Weinhuber npm = 0; 1248a4d26c6aSStefan Weinhuber ppm = 0; 1249a4d26c6aSStefan Weinhuber epm = 0; 12505db8440cSStefan Haberland hpfpm = 0; 12515db8440cSStefan Haberland cablepm = 0; 12525db8440cSStefan Haberland 1253a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1254b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1255b206181dSStefan Haberland continue; 1256b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1257a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1258a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1259a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1260a4d26c6aSStefan Weinhuber data->rcd_buffer, 1261a4d26c6aSStefan Weinhuber lpm); 1262a4d26c6aSStefan Weinhuber if (!rc) { 1263a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1264b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1265b206181dSStefan Haberland ) { 1266a4d26c6aSStefan Weinhuber case 0x02: 1267a4d26c6aSStefan Weinhuber npm |= lpm; 1268a4d26c6aSStefan Weinhuber break; 1269a4d26c6aSStefan Weinhuber case 0x03: 1270a4d26c6aSStefan Weinhuber ppm |= lpm; 1271a4d26c6aSStefan Weinhuber break; 1272a4d26c6aSStefan Weinhuber } 1273a4d26c6aSStefan Weinhuber opm |= lpm; 1274a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1275a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1276a4d26c6aSStefan Weinhuber "path verification: No configuration " 1277a4d26c6aSStefan Weinhuber "data retrieved"); 1278a4d26c6aSStefan Weinhuber opm |= lpm; 1279a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1280a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1281a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1282a4d26c6aSStefan Weinhuber " try again later"); 1283a4d26c6aSStefan Weinhuber epm |= lpm; 1284a4d26c6aSStefan Weinhuber } else { 1285a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1286a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1287a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1288a4d26c6aSStefan Weinhuber continue; 1289a4d26c6aSStefan Weinhuber } 1290a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1291a4d26c6aSStefan Weinhuber opm &= ~lpm; 1292a4d26c6aSStefan Weinhuber npm &= ~lpm; 1293a4d26c6aSStefan Weinhuber ppm &= ~lpm; 12945db8440cSStefan Haberland hpfpm |= lpm; 1295b206181dSStefan Haberland continue; 1296b206181dSStefan Haberland } 1297b206181dSStefan Haberland 1298b206181dSStefan Haberland /* 1299b206181dSStefan Haberland * save conf_data for comparison after 1300b206181dSStefan Haberland * rebuild_device_uid may have changed 1301b206181dSStefan Haberland * the original data 1302b206181dSStefan Haberland */ 1303b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1304b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1305b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1306b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1307b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1308b206181dSStefan Haberland path_private.conf_data = NULL; 1309b206181dSStefan Haberland path_private.conf_len = 0; 1310b206181dSStefan Haberland continue; 1311b206181dSStefan Haberland } 1312b206181dSStefan Haberland 1313b206181dSStefan Haberland /* 1314b206181dSStefan Haberland * compare path UID with device UID only if at least 1315b206181dSStefan Haberland * one valid path is left 1316b206181dSStefan Haberland * in other case the device UID may have changed and 1317b206181dSStefan Haberland * the first working path UID will be used as device UID 1318b206181dSStefan Haberland */ 1319c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1320b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1321b206181dSStefan Haberland /* 1322b206181dSStefan Haberland * the comparison was not successful 1323b206181dSStefan Haberland * rebuild the device UID with at least one 1324b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1325b206181dSStefan Haberland * has changed the device 1326b206181dSStefan Haberland * 1327b206181dSStefan Haberland * after this compare again 1328b206181dSStefan Haberland * 1329b206181dSStefan Haberland * if either the rebuild or the recompare fails 1330b206181dSStefan Haberland * the path can not be used 1331b206181dSStefan Haberland */ 1332b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1333b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1334b206181dSStefan Haberland device, &path_private)) { 1335b206181dSStefan Haberland uid = &path_private.uid; 1336b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1337b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1338b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1339b206181dSStefan Haberland uid->vendor, uid->serial, 1340b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1341b206181dSStefan Haberland uid->vduit); 1342b206181dSStefan Haberland else 1343b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1344b206181dSStefan Haberland "%s.%s.%04x.%02x", 1345b206181dSStefan Haberland uid->vendor, uid->serial, 1346b206181dSStefan Haberland uid->ssid, 1347b206181dSStefan Haberland uid->real_unit_addr); 1348b206181dSStefan Haberland dev_err(&device->cdev->dev, 1349b206181dSStefan Haberland "The newly added channel path %02X " 1350b206181dSStefan Haberland "will not be used because it leads " 1351b206181dSStefan Haberland "to a different device %s\n", 1352b206181dSStefan Haberland lpm, print_uid); 1353b206181dSStefan Haberland opm &= ~lpm; 1354b206181dSStefan Haberland npm &= ~lpm; 1355b206181dSStefan Haberland ppm &= ~lpm; 13565db8440cSStefan Haberland cablepm |= lpm; 1357b206181dSStefan Haberland continue; 1358a4d26c6aSStefan Weinhuber } 1359a4d26c6aSStefan Weinhuber } 1360b206181dSStefan Haberland 1361a4d26c6aSStefan Weinhuber /* 1362a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1363a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1364a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1365a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1366a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1367a4d26c6aSStefan Weinhuber */ 1368a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1369c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1370c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1371a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 13725db8440cSStefan Haberland } else { 1373c9346151SStefan Haberland dasd_path_add_opm(device, opm); 13745db8440cSStefan Haberland } 1375c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1376c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1377c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1378c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1379c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1380a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1381b206181dSStefan Haberland } 13821eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1383a4d26c6aSStefan Weinhuber dasd_put_device(device); 1384a4d26c6aSStefan Weinhuber if (data->isglobal) 1385a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1386a4d26c6aSStefan Weinhuber else 1387a4d26c6aSStefan Weinhuber kfree(data); 1388a4d26c6aSStefan Weinhuber } 1389a4d26c6aSStefan Weinhuber 1390a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1391a4d26c6aSStefan Weinhuber { 1392a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1393a4d26c6aSStefan Weinhuber 1394a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1395a4d26c6aSStefan Weinhuber if (!data) { 1396a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1397a4d26c6aSStefan Weinhuber data = path_verification_worker; 1398a4d26c6aSStefan Weinhuber data->isglobal = 1; 1399a4d26c6aSStefan Weinhuber } else 1400a4d26c6aSStefan Weinhuber return -ENOMEM; 1401a4d26c6aSStefan Weinhuber } else { 1402a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1403a4d26c6aSStefan Weinhuber data->isglobal = 0; 1404a4d26c6aSStefan Weinhuber } 1405a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1406a4d26c6aSStefan Weinhuber dasd_get_device(device); 1407a4d26c6aSStefan Weinhuber data->device = device; 1408a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1409a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1410a4d26c6aSStefan Weinhuber return 0; 1411a4d26c6aSStefan Weinhuber } 1412a4d26c6aSStefan Weinhuber 1413a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1414a521b048SStefan Haberland { 1415a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1416a521b048SStefan Haberland unsigned long flags; 1417a521b048SStefan Haberland 1418a521b048SStefan Haberland if (!private->fcx_max_data) 1419a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1420a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1421a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1422a521b048SStefan Haberland dasd_schedule_device_bh(device); 1423a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1424a521b048SStefan Haberland } 1425a521b048SStefan Haberland 14268e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14278e09f215SStefan Weinhuber { 1428543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14298e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14308e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14318e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14328e09f215SStefan Weinhuber struct ccw1 *ccw; 14338e09f215SStefan Weinhuber int rc; 14348e09f215SStefan Weinhuber 143568d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 143668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14378e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14388e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1439c5205f2fSSebastian Ott device, NULL); 14408e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1441b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1442b8ed5dd5SStefan Haberland "allocate initialization request"); 14438e09f215SStefan Weinhuber return PTR_ERR(cqr); 14448e09f215SStefan Weinhuber } 14458e09f215SStefan Weinhuber cqr->startdev = device; 14468e09f215SStefan Weinhuber cqr->memdev = device; 14478e09f215SStefan Weinhuber cqr->block = NULL; 1448eb6e199bSStefan Weinhuber cqr->retries = 256; 14498e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14508e09f215SStefan Weinhuber 14518e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14528e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14538e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14548e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14558e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14568e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14578e09f215SStefan Weinhuber 14588e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14598e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14608e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14618e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14628e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14638e09f215SStefan Weinhuber 14648e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14658e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14668e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14678e09f215SStefan Weinhuber 14688e09f215SStefan Weinhuber ccw++; 14698e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14708e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14718e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14728e09f215SStefan Weinhuber 14731aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14748e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14758e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14768e09f215SStefan Weinhuber if (rc == 0) { 14778e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14788e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14798e09f215SStefan Weinhuber memcpy(&private->features, features, 14808e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 148168d1e5f0SStefan Weinhuber } else 148268d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 148368d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14848e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14858e09f215SStefan Weinhuber return rc; 14868e09f215SStefan Weinhuber } 14878e09f215SStefan Weinhuber 1488c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1489c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1490c729696bSJan Höppner { 1491c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1492c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1493c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1494c729696bSJan Höppner struct dasd_ccw_req *cqr; 1495c729696bSJan Höppner struct ccw1 *ccw; 14969e12e54cSJan Höppner int useglobal; 1497c729696bSJan Höppner int rc; 1498c729696bSJan Höppner 1499c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1500c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1501c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1502c729696bSJan Höppner return 0; 1503c729696bSJan Höppner 15049e12e54cSJan Höppner useglobal = 0; 1505c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1506c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1507c729696bSJan Höppner if (IS_ERR(cqr)) { 1508c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1509c729696bSJan Höppner "Could not allocate initialization request"); 15109e12e54cSJan Höppner mutex_lock(&dasd_vol_info_mutex); 15119e12e54cSJan Höppner useglobal = 1; 15129e12e54cSJan Höppner cqr = &dasd_vol_info_req->cqr; 15139e12e54cSJan Höppner memset(cqr, 0, sizeof(*cqr)); 15149e12e54cSJan Höppner memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 15159e12e54cSJan Höppner cqr->cpaddr = &dasd_vol_info_req->ccw; 15169e12e54cSJan Höppner cqr->data = &dasd_vol_info_req->data; 15179e12e54cSJan Höppner cqr->magic = DASD_ECKD_MAGIC; 1518c729696bSJan Höppner } 1519c729696bSJan Höppner 1520c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1521c729696bSJan Höppner prssdp = cqr->data; 1522c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1523c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1524c729696bSJan Höppner prssdp->lss = private->ned->ID; 1525c729696bSJan Höppner prssdp->volume = private->ned->unit_addr; 1526c729696bSJan Höppner 1527c729696bSJan Höppner ccw = cqr->cpaddr; 1528c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1529c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1530c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1531c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1532c729696bSJan Höppner 1533c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1534c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1535c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1536c729696bSJan Höppner 1537c729696bSJan Höppner ccw++; 1538c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1539c729696bSJan Höppner ccw->count = sizeof(*vsq); 1540c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1541c729696bSJan Höppner ccw->cda = (__u32)(addr_t)vsq; 1542c729696bSJan Höppner 1543c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1544c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1545c729696bSJan Höppner cqr->startdev = device; 1546c729696bSJan Höppner cqr->memdev = device; 1547c729696bSJan Höppner cqr->block = NULL; 1548c729696bSJan Höppner cqr->retries = 256; 1549c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1550c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1551c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1552c729696bSJan Höppner 1553c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1554c729696bSJan Höppner if (rc == 0) { 1555c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1556c729696bSJan Höppner } else { 1557dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1558dd454839SJan Höppner "Reading the volume storage information failed with rc=%d", rc); 1559c729696bSJan Höppner } 1560c729696bSJan Höppner 15619e12e54cSJan Höppner if (useglobal) 15629e12e54cSJan Höppner mutex_unlock(&dasd_vol_info_mutex); 15639e12e54cSJan Höppner else 1564c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1565c729696bSJan Höppner 1566c729696bSJan Höppner return rc; 1567c729696bSJan Höppner } 1568c729696bSJan Höppner 1569c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1570c729696bSJan Höppner { 1571c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1572c729696bSJan Höppner 1573c729696bSJan Höppner return private->vsq.vol_info.ese; 1574c729696bSJan Höppner } 1575c729696bSJan Höppner 1576c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1577c729696bSJan Höppner { 1578c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1579c729696bSJan Höppner 1580c729696bSJan Höppner return private->vsq.extent_pool_id; 1581c729696bSJan Höppner } 1582c729696bSJan Höppner 1583c729696bSJan Höppner /* 1584c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1585c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1586c729696bSJan Höppner * The data for this value is therefore updated on any call. 1587c729696bSJan Höppner */ 1588c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1589c729696bSJan Höppner { 1590c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1591c729696bSJan Höppner int rc; 1592c729696bSJan Höppner 1593c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1594c729696bSJan Höppner 1595c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1596c729696bSJan Höppner } 1597c729696bSJan Höppner 1598c729696bSJan Höppner /* 1599c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1600c729696bSJan Höppner * therefore updated on any call. 1601c729696bSJan Höppner */ 1602c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1603c729696bSJan Höppner { 1604c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1605c729696bSJan Höppner int rc; 1606c729696bSJan Höppner 1607c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1608c729696bSJan Höppner 1609c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1610c729696bSJan Höppner } 1611c729696bSJan Höppner 1612c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1613c729696bSJan Höppner { 1614c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1615c729696bSJan Höppner 1616c729696bSJan Höppner return private->vsq.logical_capacity; 1617c729696bSJan Höppner } 1618c729696bSJan Höppner 16199e12e54cSJan Höppner static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 16209e12e54cSJan Höppner { 16219e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 16229e12e54cSJan Höppner struct dasd_device *device; 16239e12e54cSJan Höppner struct dasd_device *base; 16249e12e54cSJan Höppner 16259e12e54cSJan Höppner data = container_of(work, struct ext_pool_exhaust_work_data, worker); 16269e12e54cSJan Höppner device = data->device; 16279e12e54cSJan Höppner base = data->base; 16289e12e54cSJan Höppner 16299e12e54cSJan Höppner if (!base) 16309e12e54cSJan Höppner base = device; 16319e12e54cSJan Höppner if (dasd_eckd_space_configured(base) != 0) { 16329e12e54cSJan Höppner dasd_generic_space_avail(device); 16339e12e54cSJan Höppner } else { 16349e12e54cSJan Höppner dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 16359e12e54cSJan Höppner DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 16369e12e54cSJan Höppner } 16379e12e54cSJan Höppner 16389e12e54cSJan Höppner dasd_put_device(device); 16399e12e54cSJan Höppner kfree(data); 16409e12e54cSJan Höppner } 16419e12e54cSJan Höppner 16429e12e54cSJan Höppner static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 16439e12e54cSJan Höppner struct dasd_ccw_req *cqr) 16449e12e54cSJan Höppner { 16459e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 16469e12e54cSJan Höppner 16479e12e54cSJan Höppner data = kzalloc(sizeof(*data), GFP_ATOMIC); 16489e12e54cSJan Höppner if (!data) 16499e12e54cSJan Höppner return -ENOMEM; 16509e12e54cSJan Höppner INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 16519e12e54cSJan Höppner dasd_get_device(device); 16529e12e54cSJan Höppner data->device = device; 16539e12e54cSJan Höppner 16549e12e54cSJan Höppner if (cqr->block) 16559e12e54cSJan Höppner data->base = cqr->block->base; 16569e12e54cSJan Höppner else if (cqr->basedev) 16579e12e54cSJan Höppner data->base = cqr->basedev; 16589e12e54cSJan Höppner else 16599e12e54cSJan Höppner data->base = NULL; 16609e12e54cSJan Höppner 16619e12e54cSJan Höppner schedule_work(&data->worker); 16629e12e54cSJan Höppner 16639e12e54cSJan Höppner return 0; 16649e12e54cSJan Höppner } 16659e12e54cSJan Höppner 1666c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1667c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1668c729696bSJan Höppner { 1669c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1670c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1671c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1672c729696bSJan Höppner int i; 1673c729696bSJan Höppner 1674c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1675c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1676c729696bSJan Höppner if (eps.pool_id == pool_id) { 1677c729696bSJan Höppner memcpy(&private->eps, &eps, 1678c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1679c729696bSJan Höppner } 1680c729696bSJan Höppner } 1681c729696bSJan Höppner } 1682c729696bSJan Höppner 1683c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1684c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1685c729696bSJan Höppner { 1686c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1687c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1688c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1689c729696bSJan Höppner struct dasd_ccw_req *cqr; 1690c729696bSJan Höppner struct ccw1 *ccw; 1691c729696bSJan Höppner int rc; 1692c729696bSJan Höppner 1693c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1694c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1695c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1696c729696bSJan Höppner return 0; 1697c729696bSJan Höppner 1698c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1699c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1700c729696bSJan Höppner if (IS_ERR(cqr)) { 1701c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1702c729696bSJan Höppner "Could not allocate initialization request"); 1703c729696bSJan Höppner return PTR_ERR(cqr); 1704c729696bSJan Höppner } 1705c729696bSJan Höppner 1706c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1707c729696bSJan Höppner prssdp = cqr->data; 1708c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1709c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1710c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1711c729696bSJan Höppner 1712c729696bSJan Höppner ccw = cqr->cpaddr; 1713c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1714c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1715c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1716c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1717c729696bSJan Höppner 1718c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1719c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1720c729696bSJan Höppner 1721c729696bSJan Höppner ccw++; 1722c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1723c729696bSJan Höppner ccw->count = sizeof(*lcq); 1724c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1725c729696bSJan Höppner ccw->cda = (__u32)(addr_t)lcq; 1726c729696bSJan Höppner 1727c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1728c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1729c729696bSJan Höppner cqr->startdev = device; 1730c729696bSJan Höppner cqr->memdev = device; 1731c729696bSJan Höppner cqr->block = NULL; 1732c729696bSJan Höppner cqr->retries = 256; 1733c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1734c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1735c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1736c729696bSJan Höppner 1737c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1738c729696bSJan Höppner if (rc == 0) { 1739c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1740c729696bSJan Höppner } else { 1741dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1742dd454839SJan Höppner "Reading the logical configuration failed with rc=%d", rc); 1743c729696bSJan Höppner } 1744c729696bSJan Höppner 1745c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1746c729696bSJan Höppner 1747c729696bSJan Höppner return rc; 1748c729696bSJan Höppner } 1749c729696bSJan Höppner 1750c729696bSJan Höppner /* 1751c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1752c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1753c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1754c729696bSJan Höppner */ 1755c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1756c729696bSJan Höppner { 1757c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1758c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1759c729696bSJan Höppner 1760c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1761c729696bSJan Höppner return 0; 1762c729696bSJan Höppner if (eps.extent_size.size_1G) 1763c729696bSJan Höppner return 1113; 1764c729696bSJan Höppner if (eps.extent_size.size_16M) 1765c729696bSJan Höppner return 21; 1766c729696bSJan Höppner 1767c729696bSJan Höppner return 0; 1768c729696bSJan Höppner } 1769c729696bSJan Höppner 1770c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1771c729696bSJan Höppner { 1772c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1773c729696bSJan Höppner 1774c729696bSJan Höppner return private->eps.warn_thrshld; 1775c729696bSJan Höppner } 1776c729696bSJan Höppner 1777c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1778c729696bSJan Höppner { 1779c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1780c729696bSJan Höppner 1781c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1782c729696bSJan Höppner } 1783c729696bSJan Höppner 1784c729696bSJan Höppner /* 1785c729696bSJan Höppner * Extent Pool out of space 1786c729696bSJan Höppner */ 1787c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1788c729696bSJan Höppner { 1789c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1790c729696bSJan Höppner 1791c729696bSJan Höppner return private->eps.flags.pool_oos; 1792c729696bSJan Höppner } 17938e09f215SStefan Weinhuber 17943d052595SHorst Hummel /* 179540545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 179640545573SHorst Hummel */ 1797f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1798f3eb5384SStefan Weinhuber int enable_pav) 179940545573SHorst Hummel { 180040545573SHorst Hummel struct dasd_ccw_req *cqr; 180140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 180240545573SHorst Hummel struct ccw1 *ccw; 180340545573SHorst Hummel 180468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 180540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1806c5205f2fSSebastian Ott device, NULL); 180740545573SHorst Hummel 180840545573SHorst Hummel if (IS_ERR(cqr)) { 1809fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 181040545573SHorst Hummel "Could not allocate PSF-SSC request"); 181140545573SHorst Hummel return cqr; 181240545573SHorst Hummel } 181340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 181440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1815626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1816f3eb5384SStefan Weinhuber if (enable_pav) { 1817626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 18188e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1819f3eb5384SStefan Weinhuber } 182040545573SHorst Hummel ccw = cqr->cpaddr; 182140545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 182240545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 182340545573SHorst Hummel ccw->count = 66; 182440545573SHorst Hummel 18258e09f215SStefan Weinhuber cqr->startdev = device; 18268e09f215SStefan Weinhuber cqr->memdev = device; 18278e09f215SStefan Weinhuber cqr->block = NULL; 1828eb6e199bSStefan Weinhuber cqr->retries = 256; 182940545573SHorst Hummel cqr->expires = 10*HZ; 18301aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 183140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 183240545573SHorst Hummel return cqr; 183340545573SHorst Hummel } 183440545573SHorst Hummel 183540545573SHorst Hummel /* 183640545573SHorst Hummel * Perform Subsystem Function. 183740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 183840545573SHorst Hummel * call might change behaviour of DASD devices. 183940545573SHorst Hummel */ 184040545573SHorst Hummel static int 184112d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 184212d7b107SStefan Haberland unsigned long flags) 184340545573SHorst Hummel { 184440545573SHorst Hummel struct dasd_ccw_req *cqr; 184540545573SHorst Hummel int rc; 184640545573SHorst Hummel 1847f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 184840545573SHorst Hummel if (IS_ERR(cqr)) 184940545573SHorst Hummel return PTR_ERR(cqr); 185040545573SHorst Hummel 185112d7b107SStefan Haberland /* 185212d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 185312d7b107SStefan Haberland * the calling function should handle failed requests 185412d7b107SStefan Haberland */ 185512d7b107SStefan Haberland cqr->flags |= flags; 185612d7b107SStefan Haberland 185740545573SHorst Hummel rc = dasd_sleep_on(cqr); 185840545573SHorst Hummel if (!rc) 185940545573SHorst Hummel /* trigger CIO to reprobe devices */ 186040545573SHorst Hummel css_schedule_reprobe(); 186112d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 186212d7b107SStefan Haberland rc = -EAGAIN; 186312d7b107SStefan Haberland 18648e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 186540545573SHorst Hummel return rc; 186640545573SHorst Hummel } 186740545573SHorst Hummel 186840545573SHorst Hummel /* 186940545573SHorst Hummel * Valide storage server of current device. 187040545573SHorst Hummel */ 187112d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 187212d7b107SStefan Haberland unsigned long flags) 187340545573SHorst Hummel { 1874543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1875543691a4SSebastian Ott int enable_pav, rc; 187640545573SHorst Hummel 1877f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1878f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 187912d7b107SStefan Haberland return 0; 188040545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1881f3eb5384SStefan Weinhuber enable_pav = 0; 1882f3eb5384SStefan Weinhuber else 1883f3eb5384SStefan Weinhuber enable_pav = 1; 188412d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1885eb6e199bSStefan Weinhuber 188640545573SHorst Hummel /* may be requested feature is not available on server, 188740545573SHorst Hummel * therefore just report error and go ahead */ 1888b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1889b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 189012d7b107SStefan Haberland return rc; 189140545573SHorst Hummel } 189240545573SHorst Hummel 1893f1633031SStefan Haberland /* 1894f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1895f1633031SStefan Haberland */ 1896f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1897f1633031SStefan Haberland { 1898f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1899f1633031SStefan Haberland kick_validate); 1900ea4da6eaSStefan Haberland unsigned long flags = 0; 1901ea4da6eaSStefan Haberland 1902ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1903ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 190412d7b107SStefan Haberland == -EAGAIN) { 190512d7b107SStefan Haberland /* schedule worker again if failed */ 190612d7b107SStefan Haberland schedule_work(&device->kick_validate); 190712d7b107SStefan Haberland return; 190812d7b107SStefan Haberland } 190912d7b107SStefan Haberland 1910f1633031SStefan Haberland dasd_put_device(device); 1911f1633031SStefan Haberland } 1912f1633031SStefan Haberland 1913f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1914f1633031SStefan Haberland { 1915f1633031SStefan Haberland dasd_get_device(device); 191625e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 191725e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 191825e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 191925e2cf1cSStefan Haberland dasd_put_device(device); 192025e2cf1cSStefan Haberland return; 192125e2cf1cSStefan Haberland } 1922f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1923f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1924f2608cd4SStefan Haberland dasd_put_device(device); 1925f1633031SStefan Haberland } 1926f1633031SStefan Haberland 192740545573SHorst Hummel /* 19283d052595SHorst Hummel * Check device characteristics. 19293d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 19303d052595SHorst Hummel */ 19311da177e4SLinus Torvalds static int 19321da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 19331da177e4SLinus Torvalds { 1934543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19358e09f215SStefan Weinhuber struct dasd_block *block; 19362dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1937f9f8d02fSStefan Haberland int rc, i; 193833b62a30SStefan Weinhuber int readonly; 19397c8faa86SStefan Haberland unsigned long value; 19401da177e4SLinus Torvalds 1941f1633031SStefan Haberland /* setup work queue for validate server*/ 1942f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 194359a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 194459a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1945f1633031SStefan Haberland 1946454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1947454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1948454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1949454e1fa1SPeter Oberparleiter return -EIO; 1950454e1fa1SPeter Oberparleiter } 1951454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1952454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1953454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1954454e1fa1SPeter Oberparleiter } 195592636b15SSebastian Ott if (!private) { 195692636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 195792636b15SSebastian Ott if (!private) { 1958fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1959fc19f381SStefan Haberland "Allocating memory for private DASD data " 1960fc19f381SStefan Haberland "failed\n"); 19611da177e4SLinus Torvalds return -ENOMEM; 19621da177e4SLinus Torvalds } 1963543691a4SSebastian Ott device->private = private; 196492636b15SSebastian Ott } else { 196592636b15SSebastian Ott memset(private, 0, sizeof(*private)); 19661da177e4SLinus Torvalds } 19671da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 19681da177e4SLinus Torvalds private->init_cqr_status = -1; 19691da177e4SLinus Torvalds /* Set default cache operations. */ 19701da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 19711da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 19721da177e4SLinus Torvalds 197340545573SHorst Hummel /* Read Configuration Data */ 197440545573SHorst Hummel rc = dasd_eckd_read_conf(device); 197540545573SHorst Hummel if (rc) 19768e09f215SStefan Weinhuber goto out_err1; 197740545573SHorst Hummel 1978a521b048SStefan Haberland /* set some default values */ 19797c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 19801f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 1981a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1982a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 19831f1ee9adSHannes Reinecke 19847c8faa86SStefan Haberland if (private->gneq) { 19857c8faa86SStefan Haberland value = 1; 19867c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 19877c8faa86SStefan Haberland value = 10 * value; 19887c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 19897c8faa86SStefan Haberland /* do not accept useless values */ 19907c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 19917c8faa86SStefan Haberland device->default_expires = value; 19927c8faa86SStefan Haberland } 19937c8faa86SStefan Haberland 19942dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 19952dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 19968e09f215SStefan Weinhuber block = dasd_alloc_block(); 19978e09f215SStefan Weinhuber if (IS_ERR(block)) { 1998b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1999b8ed5dd5SStefan Haberland "could not allocate dasd " 2000b8ed5dd5SStefan Haberland "block structure"); 20018e09f215SStefan Weinhuber rc = PTR_ERR(block); 20028e09f215SStefan Weinhuber goto out_err1; 20038e09f215SStefan Weinhuber } 20048e09f215SStefan Weinhuber device->block = block; 20058e09f215SStefan Weinhuber block->base = device; 20068e09f215SStefan Weinhuber } 20078e09f215SStefan Weinhuber 2008f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 2009f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 2010f9f8d02fSStefan Haberland if (rc) 20118e09f215SStefan Weinhuber goto out_err2; 2012f9f8d02fSStefan Haberland 201312d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 2014f4ac1d02SStefan Weinhuber 2015f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 2016f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 201740545573SHorst Hummel if (rc) 20188e09f215SStefan Weinhuber goto out_err3; 20198e09f215SStefan Weinhuber 20208e09f215SStefan Weinhuber /* Read Feature Codes */ 202168d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 202240545573SHorst Hummel 2023c729696bSJan Höppner /* Read Volume Information */ 2024dd454839SJan Höppner dasd_eckd_read_vol_info(device); 2025c729696bSJan Höppner 2026c729696bSJan Höppner /* Read Extent Pool Information */ 2027dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 2028c729696bSJan Höppner 20291da177e4SLinus Torvalds /* Read Device Characteristics */ 203068b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 203168b781feSStefan Haberland &private->rdc_data, 64); 20328e09f215SStefan Weinhuber if (rc) { 2033b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2034b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 20358e09f215SStefan Weinhuber goto out_err3; 20368e09f215SStefan Weinhuber } 203734cd551aSStefan Haberland 203834cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 203934cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 204034cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 204134cd551aSStefan Haberland "support raw-track access\n"); 204234cd551aSStefan Haberland rc = -EINVAL; 204334cd551aSStefan Haberland goto out_err3; 204434cd551aSStefan Haberland } 204534cd551aSStefan Haberland 2046817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 2047b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2048b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 2049b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 2050b44b0ab3SStefan Weinhuber else 2051b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 2052b44b0ab3SStefan Weinhuber 2053ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 2054ef19298bSStefan Weinhuber 205533b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 205633b62a30SStefan Weinhuber if (readonly) 205733b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 205833b62a30SStefan Weinhuber 2059fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 206033b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 20611da177e4SLinus Torvalds private->rdc_data.dev_type, 20621da177e4SLinus Torvalds private->rdc_data.dev_model, 20631da177e4SLinus Torvalds private->rdc_data.cu_type, 20641da177e4SLinus Torvalds private->rdc_data.cu_model.model, 2065b44b0ab3SStefan Weinhuber private->real_cyl, 20661da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 206733b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 206833b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 20698e09f215SStefan Weinhuber return 0; 20708e09f215SStefan Weinhuber 20718e09f215SStefan Weinhuber out_err3: 20728e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 20738e09f215SStefan Weinhuber out_err2: 20748e09f215SStefan Weinhuber dasd_free_block(device->block); 20758e09f215SStefan Weinhuber device->block = NULL; 20768e09f215SStefan Weinhuber out_err1: 207700b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 20788e09f215SStefan Weinhuber kfree(device->private); 20798e09f215SStefan Weinhuber device->private = NULL; 20803d052595SHorst Hummel return rc; 20811da177e4SLinus Torvalds } 20821da177e4SLinus Torvalds 20838e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 20848e09f215SStefan Weinhuber { 2085543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 20864abb08c2SStefan Weinhuber 20877c6553d4SStefan Haberland if (!private) 20887c6553d4SStefan Haberland return; 20897c6553d4SStefan Haberland 20908e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 20914abb08c2SStefan Weinhuber private->ned = NULL; 20924abb08c2SStefan Weinhuber private->sneq = NULL; 20934abb08c2SStefan Weinhuber private->vdsneq = NULL; 20944abb08c2SStefan Weinhuber private->gneq = NULL; 209500b39f69SStefan Haberland dasd_eckd_clear_conf_data(device); 20968e09f215SStefan Weinhuber } 20978e09f215SStefan Weinhuber 20981da177e4SLinus Torvalds static struct dasd_ccw_req * 20991da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 21001da177e4SLinus Torvalds { 2101543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21021da177e4SLinus Torvalds struct eckd_count *count_data; 21031da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 21041da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 21051da177e4SLinus Torvalds struct ccw1 *ccw; 21061da177e4SLinus Torvalds int cplength, datasize; 21071da177e4SLinus Torvalds int i; 21081da177e4SLinus Torvalds 21091da177e4SLinus Torvalds cplength = 8; 21101da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2111c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2112c5205f2fSSebastian Ott NULL); 21131da177e4SLinus Torvalds if (IS_ERR(cqr)) 21141da177e4SLinus Torvalds return cqr; 21151da177e4SLinus Torvalds ccw = cqr->cpaddr; 2116ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2117ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 211845f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 21191da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 21201da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 21211da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21221da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 21231da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 21241da177e4SLinus Torvalds 21251da177e4SLinus Torvalds count_data = private->count_area; 21261da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 21271da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21281da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 21291da177e4SLinus Torvalds ccw->flags = 0; 21301da177e4SLinus Torvalds ccw->count = 8; 21311da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 21321da177e4SLinus Torvalds ccw++; 21331da177e4SLinus Torvalds count_data++; 21341da177e4SLinus Torvalds } 21351da177e4SLinus Torvalds 2136ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 21371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2138ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 21391da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 21401da177e4SLinus Torvalds /* Read count ccw. */ 21411da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21421da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 21431da177e4SLinus Torvalds ccw->flags = 0; 21441da177e4SLinus Torvalds ccw->count = 8; 21451da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 21461da177e4SLinus Torvalds 21478e09f215SStefan Weinhuber cqr->block = NULL; 21488e09f215SStefan Weinhuber cqr->startdev = device; 21498e09f215SStefan Weinhuber cqr->memdev = device; 2150eb6e199bSStefan Weinhuber cqr->retries = 255; 21511aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 21521da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 21539e12e54cSJan Höppner /* Set flags to suppress output for expected errors */ 21549e12e54cSJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 21559e12e54cSJan Höppner 21561da177e4SLinus Torvalds return cqr; 21571da177e4SLinus Torvalds } 21581da177e4SLinus Torvalds 2159eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2160eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2161eb6e199bSStefan Weinhuber { 2162eb6e199bSStefan Weinhuber char *sense; 2163eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2164eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2165eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2166eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2167eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2168eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2169eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2170eb6e199bSStefan Weinhuber else 2171eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2172eb6e199bSStefan Weinhuber } else 2173eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2174eb6e199bSStefan Weinhuber } 2175eb6e199bSStefan Weinhuber 21761da177e4SLinus Torvalds /* 21771da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 21781da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 21791da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 21801da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 21811da177e4SLinus Torvalds * for deletion in the meantime). 21821da177e4SLinus Torvalds */ 2183eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2184eb6e199bSStefan Weinhuber void *data) 21851da177e4SLinus Torvalds { 2186543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2187543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21881da177e4SLinus Torvalds 2189eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 21901da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 21911da177e4SLinus Torvalds dasd_kick_device(device); 21921da177e4SLinus Torvalds } 21931da177e4SLinus Torvalds 2194eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 21951da177e4SLinus Torvalds { 21961da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 21971da177e4SLinus Torvalds 21988e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 21991da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 22001da177e4SLinus Torvalds return PTR_ERR(init_cqr); 22011da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 22021da177e4SLinus Torvalds init_cqr->callback_data = NULL; 22031da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2204eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2205eb6e199bSStefan Weinhuber * devices as special case 2206eb6e199bSStefan Weinhuber */ 2207eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2208eb6e199bSStefan Weinhuber init_cqr->retries = 0; 22091da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 22101da177e4SLinus Torvalds return -EAGAIN; 22111da177e4SLinus Torvalds } 22121da177e4SLinus Torvalds 2213eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 22141da177e4SLinus Torvalds { 2215543691a4SSebastian Ott struct dasd_device *device = block->base; 2216543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22171da177e4SLinus Torvalds struct eckd_count *count_area; 22181da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 22191da177e4SLinus Torvalds int status, i; 2220eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 22211da177e4SLinus Torvalds 22221da177e4SLinus Torvalds status = private->init_cqr_status; 22231da177e4SLinus Torvalds private->init_cqr_status = -1; 2224eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2225eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2226eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2227eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2228eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2229eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2230eb6e199bSStefan Weinhuber } 2231eb6e199bSStefan Weinhuber 2232e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2233e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2234e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2235e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2236e4dbb0f2SStefan Haberland goto raw; 2237e4dbb0f2SStefan Haberland } 2238e4dbb0f2SStefan Haberland 2239eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2240eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 22411da177e4SLinus Torvalds return -EMEDIUMTYPE; 2242eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2243eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2244eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2245eb6e199bSStefan Weinhuber "of an I/O error\n"); 2246eb6e199bSStefan Weinhuber return -EIO; 22471da177e4SLinus Torvalds } 22481da177e4SLinus Torvalds 22491da177e4SLinus Torvalds private->uses_cdl = 1; 22501da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 22511da177e4SLinus Torvalds count_area = NULL; 22521da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 22531da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 22543bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 22553bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 22563bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22573bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 22581da177e4SLinus Torvalds private->uses_cdl = 0; 22591da177e4SLinus Torvalds break; 22601da177e4SLinus Torvalds } 22611da177e4SLinus Torvalds } 22621da177e4SLinus Torvalds if (i == 3) 2263ce6915f5SJan Höppner count_area = &private->count_area[3]; 22641da177e4SLinus Torvalds 22651da177e4SLinus Torvalds if (private->uses_cdl == 0) { 22661da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 22671da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 22681da177e4SLinus Torvalds (private->count_area[i].dl != 22693bc9fef9SStefan Haberland private->count_area[0].dl) || 22703bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 22713bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22723bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 22731da177e4SLinus Torvalds break; 22741da177e4SLinus Torvalds } 22751da177e4SLinus Torvalds if (i == 5) 22761da177e4SLinus Torvalds count_area = &private->count_area[0]; 22771da177e4SLinus Torvalds } else { 22781da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2279fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2280fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 22811da177e4SLinus Torvalds } 2282e4dbb0f2SStefan Haberland 22831da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 22841da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 22851da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 22868e09f215SStefan Weinhuber block->bp_block = count_area->dl; 22871da177e4SLinus Torvalds } 22888e09f215SStefan Weinhuber if (block->bp_block == 0) { 2289fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2290fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 22911da177e4SLinus Torvalds return -EMEDIUMTYPE; 22921da177e4SLinus Torvalds } 22938e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 22948e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 22958e09f215SStefan Weinhuber block->s2b_shift++; 22961da177e4SLinus Torvalds 22978e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2298e4dbb0f2SStefan Haberland 2299e4dbb0f2SStefan Haberland raw: 23002cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 23011da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23021da177e4SLinus Torvalds blk_per_trk); 23031da177e4SLinus Torvalds 2304fc19f381SStefan Haberland dev_info(&device->cdev->dev, 23052cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2306fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 23072cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 23081da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23098e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 23108e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 23111da177e4SLinus Torvalds private->uses_cdl ? 23121da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 23131da177e4SLinus Torvalds 23141da177e4SLinus Torvalds return 0; 23151da177e4SLinus Torvalds } 23161da177e4SLinus Torvalds 23178e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 23181da177e4SLinus Torvalds { 2319543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 23201da177e4SLinus Torvalds 23211da177e4SLinus Torvalds if (private->init_cqr_status < 0) 23228e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 23231da177e4SLinus Torvalds else 23248e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 23251da177e4SLinus Torvalds } 23261da177e4SLinus Torvalds 2327d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 23288e09f215SStefan Weinhuber { 23298e09f215SStefan Weinhuber return dasd_alias_add_device(device); 23308e09f215SStefan Weinhuber }; 23318e09f215SStefan Weinhuber 23328e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 23338e09f215SStefan Weinhuber { 2334669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2335669f3765SStefan Haberland dasd_put_device(device); 2336669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2337669f3765SStefan Haberland dasd_put_device(device); 2338669f3765SStefan Haberland 2339d42e1712SStefan Haberland return 0; 2340d42e1712SStefan Haberland }; 2341d42e1712SStefan Haberland 2342daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2343d42e1712SStefan Haberland { 23448e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 23458e09f215SStefan Weinhuber }; 23468e09f215SStefan Weinhuber 23471da177e4SLinus Torvalds static int 23488e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 23491da177e4SLinus Torvalds { 2350543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 23511da177e4SLinus Torvalds 23528e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 23531da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 23548e09f215SStefan Weinhuber 0, block->bp_block); 23551da177e4SLinus Torvalds } 23561da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 23571da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 23581da177e4SLinus Torvalds return 0; 23591da177e4SLinus Torvalds } 23601da177e4SLinus Torvalds 23618fd57520SJan Höppner /* 23628fd57520SJan Höppner * Build the TCW request for the format check 23638fd57520SJan Höppner */ 23648fd57520SJan Höppner static struct dasd_ccw_req * 23658fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 23668fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 23678fd57520SJan Höppner int rpt) 23688fd57520SJan Höppner { 23698fd57520SJan Höppner struct dasd_eckd_private *start_priv; 23708fd57520SJan Höppner struct dasd_device *startdev = NULL; 23718fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 23728fd57520SJan Höppner struct dasd_ccw_req *cqr; 23738fd57520SJan Höppner struct itcw *itcw; 23748fd57520SJan Höppner int itcw_size; 23758fd57520SJan Höppner int count; 23768fd57520SJan Höppner int rc; 23778fd57520SJan Höppner int i; 23788fd57520SJan Höppner 23798fd57520SJan Höppner if (enable_pav) 23808fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 23818fd57520SJan Höppner 23828fd57520SJan Höppner if (!startdev) 23838fd57520SJan Höppner startdev = base; 23848fd57520SJan Höppner 23858fd57520SJan Höppner start_priv = startdev->private; 23868fd57520SJan Höppner 23878fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 23888fd57520SJan Höppner 23898fd57520SJan Höppner /* 23908fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 23918fd57520SJan Höppner * calculate the corresponding itcw_size 23928fd57520SJan Höppner */ 23938fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 23948fd57520SJan Höppner 23955e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 23968fd57520SJan Höppner if (IS_ERR(cqr)) 23978fd57520SJan Höppner return cqr; 23988fd57520SJan Höppner 23998fd57520SJan Höppner start_priv->count++; 24008fd57520SJan Höppner 24018fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 24028fd57520SJan Höppner if (IS_ERR(itcw)) { 24038fd57520SJan Höppner rc = -EINVAL; 24048fd57520SJan Höppner goto out_err; 24058fd57520SJan Höppner } 24068fd57520SJan Höppner 24078fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 24088fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 24098fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 24108fd57520SJan Höppner sizeof(struct eckd_count), 24118fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 24128fd57520SJan Höppner if (rc) 24138fd57520SJan Höppner goto out_err; 24148fd57520SJan Höppner 24158fd57520SJan Höppner for (i = 0; i < count; i++) { 24168fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 24178fd57520SJan Höppner sizeof(struct eckd_count)); 24188fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 24198fd57520SJan Höppner rc = -EINVAL; 24208fd57520SJan Höppner goto out_err; 24218fd57520SJan Höppner } 24228fd57520SJan Höppner } 24238fd57520SJan Höppner 24248fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 24258fd57520SJan Höppner itcw_finalize(itcw); 24268fd57520SJan Höppner 24278fd57520SJan Höppner cqr->cpmode = 1; 24288fd57520SJan Höppner cqr->startdev = startdev; 24298fd57520SJan Höppner cqr->memdev = startdev; 24308fd57520SJan Höppner cqr->basedev = base; 24318fd57520SJan Höppner cqr->retries = startdev->default_retries; 24328fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 24338fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 24348fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 24358fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 24368fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 24378fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 24388fd57520SJan Höppner 24398fd57520SJan Höppner return cqr; 24408fd57520SJan Höppner 24418fd57520SJan Höppner out_err: 24428fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 24438fd57520SJan Höppner 24448fd57520SJan Höppner return ERR_PTR(rc); 24458fd57520SJan Höppner } 24468fd57520SJan Höppner 24478fd57520SJan Höppner /* 24488fd57520SJan Höppner * Build the CCW request for the format check 24498fd57520SJan Höppner */ 24508fd57520SJan Höppner static struct dasd_ccw_req * 24518fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 24528fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 24538fd57520SJan Höppner { 24548fd57520SJan Höppner struct dasd_eckd_private *start_priv; 24558fd57520SJan Höppner struct dasd_eckd_private *base_priv; 24568fd57520SJan Höppner struct dasd_device *startdev = NULL; 24578fd57520SJan Höppner struct dasd_ccw_req *cqr; 24588fd57520SJan Höppner struct ccw1 *ccw; 24598fd57520SJan Höppner void *data; 24608fd57520SJan Höppner int cplength, datasize; 24618fd57520SJan Höppner int use_prefix; 24628fd57520SJan Höppner int count; 24638fd57520SJan Höppner int i; 24648fd57520SJan Höppner 24658fd57520SJan Höppner if (enable_pav) 24668fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 24678fd57520SJan Höppner 24688fd57520SJan Höppner if (!startdev) 24698fd57520SJan Höppner startdev = base; 24708fd57520SJan Höppner 24718fd57520SJan Höppner start_priv = startdev->private; 24728fd57520SJan Höppner base_priv = base->private; 24738fd57520SJan Höppner 24748fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24758fd57520SJan Höppner 24768fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 24778fd57520SJan Höppner 24788fd57520SJan Höppner if (use_prefix) { 24798fd57520SJan Höppner cplength = 1; 24808fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 24818fd57520SJan Höppner } else { 24828fd57520SJan Höppner cplength = 2; 24838fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 24848fd57520SJan Höppner sizeof(struct LO_eckd_data); 24858fd57520SJan Höppner } 24868fd57520SJan Höppner cplength += count; 24878fd57520SJan Höppner 24885e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 24898fd57520SJan Höppner if (IS_ERR(cqr)) 24908fd57520SJan Höppner return cqr; 24918fd57520SJan Höppner 24928fd57520SJan Höppner start_priv->count++; 24938fd57520SJan Höppner data = cqr->data; 24948fd57520SJan Höppner ccw = cqr->cpaddr; 24958fd57520SJan Höppner 24968fd57520SJan Höppner if (use_prefix) { 24978fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 24988fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 24998fd57520SJan Höppner count, 0, 0); 25008fd57520SJan Höppner } else { 25018fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 250245f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 25038fd57520SJan Höppner 25048fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 25058fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25068fd57520SJan Höppner 25078fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 25088fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 25098fd57520SJan Höppner } 25108fd57520SJan Höppner 25118fd57520SJan Höppner for (i = 0; i < count; i++) { 25128fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25138fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 25148fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 25158fd57520SJan Höppner ccw->count = 8; 25168fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 25178fd57520SJan Höppner ccw++; 25188fd57520SJan Höppner fmt_buffer++; 25198fd57520SJan Höppner } 25208fd57520SJan Höppner 25218fd57520SJan Höppner cqr->startdev = startdev; 25228fd57520SJan Höppner cqr->memdev = startdev; 25238fd57520SJan Höppner cqr->basedev = base; 25248fd57520SJan Höppner cqr->retries = DASD_RETRIES; 25258fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 25268fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 25278fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 25288fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 25298fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 25308fd57520SJan Höppner 25318fd57520SJan Höppner return cqr; 25328fd57520SJan Höppner } 25338fd57520SJan Höppner 25341da177e4SLinus Torvalds static struct dasd_ccw_req * 25355e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 25365e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 25371da177e4SLinus Torvalds { 2538d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2539d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 25401da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 25411da177e4SLinus Torvalds struct eckd_count *ect; 2542d42e1712SStefan Haberland struct ch_t address; 25431da177e4SLinus Torvalds struct ccw1 *ccw; 25441da177e4SLinus Torvalds void *data; 2545b44b0ab3SStefan Weinhuber int rpt; 25461da177e4SLinus Torvalds int cplength, datasize; 2547d42e1712SStefan Haberland int i, j; 2548f9a28f7bSJean-Baptiste Joret int intensity = 0; 2549f9a28f7bSJean-Baptiste Joret int r0_perm; 2550d42e1712SStefan Haberland int nr_tracks; 255118d6624eSStefan Haberland int use_prefix; 25521da177e4SLinus Torvalds 2553a94fa154SStefan Haberland if (enable_pav) 2554d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 255529b8dd9dSStefan Haberland 2556d42e1712SStefan Haberland if (!startdev) 2557d42e1712SStefan Haberland startdev = base; 25581da177e4SLinus Torvalds 2559543691a4SSebastian Ott start_priv = startdev->private; 2560543691a4SSebastian Ott base_priv = base->private; 2561d42e1712SStefan Haberland 2562d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2563d42e1712SStefan Haberland 2564d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 25651da177e4SLinus Torvalds 25661da177e4SLinus Torvalds /* 25671da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 25681da177e4SLinus Torvalds * Bit 0: write record zero 25691da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 25701da177e4SLinus Torvalds * Bit 2: invalidate tracks 25711da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2572f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 25731da177e4SLinus Torvalds * Only some bit combinations do make sense. 25741da177e4SLinus Torvalds */ 2575f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2576f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2577f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2578f9a28f7bSJean-Baptiste Joret } else { 2579f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2580f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2581f9a28f7bSJean-Baptiste Joret } 2582d42e1712SStefan Haberland 258318d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 258418d6624eSStefan Haberland 2585f9a28f7bSJean-Baptiste Joret switch (intensity) { 25861da177e4SLinus Torvalds case 0x00: /* Normal format */ 25871da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2588d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 258918d6624eSStefan Haberland if (use_prefix) 2590d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 25911da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2592d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 259318d6624eSStefan Haberland else 259418d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 259518d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 259618d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 25971da177e4SLinus Torvalds break; 25981da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 25991da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2600d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 260118d6624eSStefan Haberland if (use_prefix) 2602d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26031da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26041da177e4SLinus Torvalds sizeof(struct eckd_count) + 2605d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 260618d6624eSStefan Haberland else 260718d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 260818d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 260918d6624eSStefan Haberland sizeof(struct eckd_count) + 261018d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26111da177e4SLinus Torvalds break; 26121da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 26131da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 26141da177e4SLinus Torvalds cplength = 3; 261518d6624eSStefan Haberland if (use_prefix) 2616d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26171da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26181da177e4SLinus Torvalds sizeof(struct eckd_count); 261918d6624eSStefan Haberland else 262018d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 262118d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 262218d6624eSStefan Haberland sizeof(struct eckd_count); 26231da177e4SLinus Torvalds break; 26241da177e4SLinus Torvalds default: 2625d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2626d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2627d42e1712SStefan Haberland fdata->intensity); 26281da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26291da177e4SLinus Torvalds } 26305e2b17e7SJan Höppner 26315e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 26321da177e4SLinus Torvalds if (IS_ERR(fcp)) 26331da177e4SLinus Torvalds return fcp; 26341da177e4SLinus Torvalds 2635d42e1712SStefan Haberland start_priv->count++; 26361da177e4SLinus Torvalds data = fcp->data; 26371da177e4SLinus Torvalds ccw = fcp->cpaddr; 26381da177e4SLinus Torvalds 2639f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 26401da177e4SLinus Torvalds case 0x00: /* Normal format. */ 264118d6624eSStefan Haberland if (use_prefix) { 2642d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2643d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2644d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2645f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2646f9a28f7bSJean-Baptiste Joret if (r0_perm) 2647d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2648d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2649d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 265018d6624eSStefan Haberland } else { 265118d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 265218d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 265345f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 265418d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 265518d6624eSStefan Haberland if (r0_perm) 265618d6624eSStefan Haberland ((struct DE_eckd_data *) data) 265718d6624eSStefan Haberland ->ga_extended |= 0x04; 265818d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 265918d6624eSStefan Haberland } 26601da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26611da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2662d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2663d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 26641da177e4SLinus Torvalds fdata->blksize); 26651da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26661da177e4SLinus Torvalds break; 26671da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 266818d6624eSStefan Haberland if (use_prefix) { 2669d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2670d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 26711da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2672d42e1712SStefan Haberland base, startdev); 2673d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 267418d6624eSStefan Haberland } else { 267518d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 267618d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 267745f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 267818d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 267918d6624eSStefan Haberland } 26801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26811da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2682d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2683d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2684d42e1712SStefan Haberland base->block->bp_block); 26851da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26861da177e4SLinus Torvalds break; 26871da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 268818d6624eSStefan Haberland if (use_prefix) { 2689d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2690d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2691d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2692d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 269318d6624eSStefan Haberland } else { 269418d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 269518d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 269645f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 269718d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 269818d6624eSStefan Haberland } 26991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27001da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 27011da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2702d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 27031da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27041da177e4SLinus Torvalds break; 27051da177e4SLinus Torvalds } 2706d42e1712SStefan Haberland 2707d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2708d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2709d42e1712SStefan Haberland set_ch_t(&address, 2710d42e1712SStefan Haberland (fdata->start_unit + j) / 2711d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2712d42e1712SStefan Haberland (fdata->start_unit + j) % 2713d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2714f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 27151da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27161da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2717b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2718b44b0ab3SStefan Weinhuber ect->head = address.head; 27191da177e4SLinus Torvalds ect->record = 0; 27201da177e4SLinus Torvalds ect->kl = 0; 27211da177e4SLinus Torvalds ect->dl = 8; 27221da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27231da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 27241da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27251da177e4SLinus Torvalds ccw->count = 8; 27261da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27271da177e4SLinus Torvalds ccw++; 27281da177e4SLinus Torvalds } 2729f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 27301da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27311da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2732b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2733b44b0ab3SStefan Weinhuber ect->head = address.head; 27341da177e4SLinus Torvalds ect->record = 1; 27351da177e4SLinus Torvalds ect->kl = 0; 27361da177e4SLinus Torvalds ect->dl = 0; 27371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27381da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 27391da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27401da177e4SLinus Torvalds ccw->count = 8; 27411da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27421da177e4SLinus Torvalds } else { /* write remaining records */ 27431da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 27441da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27451da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2746b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2747b44b0ab3SStefan Weinhuber ect->head = address.head; 27481da177e4SLinus Torvalds ect->record = i + 1; 27491da177e4SLinus Torvalds ect->kl = 0; 27501da177e4SLinus Torvalds ect->dl = fdata->blksize; 2751d42e1712SStefan Haberland /* 2752d42e1712SStefan Haberland * Check for special tracks 0-1 2753d42e1712SStefan Haberland * when formatting CDL 2754d42e1712SStefan Haberland */ 2755f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 275646d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 27571da177e4SLinus Torvalds if (i < 3) { 27581da177e4SLinus Torvalds ect->kl = 4; 27591da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 27601da177e4SLinus Torvalds } 27611da177e4SLinus Torvalds } 2762f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 276346d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 27641da177e4SLinus Torvalds ect->kl = 44; 27651da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 27661da177e4SLinus Torvalds } 27671da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2768d42e1712SStefan Haberland if (i != 0 || j == 0) 2769d42e1712SStefan Haberland ccw->cmd_code = 2770d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2771d42e1712SStefan Haberland else 2772d42e1712SStefan Haberland ccw->cmd_code = 2773d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 27741da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27751da177e4SLinus Torvalds ccw->count = 8; 27761da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27771da177e4SLinus Torvalds ccw++; 27781da177e4SLinus Torvalds } 27791da177e4SLinus Torvalds } 2780d42e1712SStefan Haberland } 2781d42e1712SStefan Haberland 2782d42e1712SStefan Haberland fcp->startdev = startdev; 2783d42e1712SStefan Haberland fcp->memdev = startdev; 278429b8dd9dSStefan Haberland fcp->basedev = base; 2785eb6e199bSStefan Weinhuber fcp->retries = 256; 2786d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 27871aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 27881da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2789d42e1712SStefan Haberland 27901da177e4SLinus Torvalds return fcp; 27911da177e4SLinus Torvalds } 27921da177e4SLinus Torvalds 2793570d237cSJan Höppner /* 2794570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2795570d237cSJan Höppner */ 2796570d237cSJan Höppner static struct dasd_ccw_req * 2797570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 27988fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 27998fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2800d42e1712SStefan Haberland { 28018fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 28028fd57520SJan Höppner 28038fd57520SJan Höppner if (!fmt_buffer) { 28045e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 28058fd57520SJan Höppner } else { 28068fd57520SJan Höppner if (tpm) 28078fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 28088fd57520SJan Höppner enable_pav, 28098fd57520SJan Höppner fmt_buffer, rpt); 28108fd57520SJan Höppner else 28118fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 28128fd57520SJan Höppner fmt_buffer, rpt); 28138fd57520SJan Höppner } 28148fd57520SJan Höppner 28158fd57520SJan Höppner return ccw_req; 2816570d237cSJan Höppner } 2817570d237cSJan Höppner 2818570d237cSJan Höppner /* 2819570d237cSJan Höppner * Sanity checks on format_data 2820570d237cSJan Höppner */ 2821570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2822570d237cSJan Höppner struct format_data_t *fdata) 2823570d237cSJan Höppner { 2824543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2825d42e1712SStefan Haberland 2826d42e1712SStefan Haberland if (fdata->start_unit >= 2827d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2828d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2829d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2830d42e1712SStefan Haberland fdata->start_unit); 2831d42e1712SStefan Haberland return -EINVAL; 2832d42e1712SStefan Haberland } 2833d42e1712SStefan Haberland if (fdata->stop_unit >= 2834d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2835d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2836d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2837d42e1712SStefan Haberland fdata->stop_unit); 2838d42e1712SStefan Haberland return -EINVAL; 2839d42e1712SStefan Haberland } 2840d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2841d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2842d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2843d42e1712SStefan Haberland fdata->start_unit); 2844d42e1712SStefan Haberland return -EINVAL; 2845d42e1712SStefan Haberland } 2846d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2847d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2848d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2849d42e1712SStefan Haberland fdata->blksize); 2850d42e1712SStefan Haberland return -EINVAL; 2851d42e1712SStefan Haberland } 2852570d237cSJan Höppner return 0; 2853570d237cSJan Höppner } 2854570d237cSJan Höppner 2855570d237cSJan Höppner /* 2856570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2857570d237cSJan Höppner */ 2858570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2859570d237cSJan Höppner struct format_data_t *fdata, 28608fd57520SJan Höppner int enable_pav, int tpm, 28618fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 28628fd57520SJan Höppner struct irb *irb) 2863570d237cSJan Höppner { 2864543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2865570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2866570d237cSJan Höppner struct list_head format_queue; 2867570d237cSJan Höppner struct dasd_device *device; 28688fd57520SJan Höppner char *sense = NULL; 2869570d237cSJan Höppner int old_start, old_stop, format_step; 2870570d237cSJan Höppner int step, retry; 2871570d237cSJan Höppner int rc; 2872570d237cSJan Höppner 2873570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2874570d237cSJan Höppner if (rc) 2875570d237cSJan Höppner return rc; 2876d42e1712SStefan Haberland 2877d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2878d42e1712SStefan Haberland 287946d1c03cSJan Höppner old_start = fdata->start_unit; 288029b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2881d42e1712SStefan Haberland 28828fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 28838fd57520SJan Höppner /* Command Mode / Format Check */ 28848fd57520SJan Höppner format_step = 1; 28858fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 28868fd57520SJan Höppner /* Transport Mode / Format Check */ 28878fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 28888fd57520SJan Höppner } else { 28898fd57520SJan Höppner /* Normal Formatting */ 28908fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 28918fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 28928fd57520SJan Höppner } 28938fd57520SJan Höppner 289446d1c03cSJan Höppner do { 289546d1c03cSJan Höppner retry = 0; 2896d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2897d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 289846d1c03cSJan Höppner if (step > format_step) { 289946d1c03cSJan Höppner fdata->stop_unit = 290046d1c03cSJan Höppner fdata->start_unit + format_step - 1; 290146d1c03cSJan Höppner } 2902d42e1712SStefan Haberland 2903570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 29048fd57520SJan Höppner enable_pav, tpm, 29058fd57520SJan Höppner fmt_buffer, rpt); 2906d42e1712SStefan Haberland if (IS_ERR(cqr)) { 290746d1c03cSJan Höppner rc = PTR_ERR(cqr); 290846d1c03cSJan Höppner if (rc == -ENOMEM) { 290946d1c03cSJan Höppner if (list_empty(&format_queue)) 291046d1c03cSJan Höppner goto out; 2911d42e1712SStefan Haberland /* 291246d1c03cSJan Höppner * not enough memory available, start 291346d1c03cSJan Höppner * requests retry after first requests 291446d1c03cSJan Höppner * were finished 2915d42e1712SStefan Haberland */ 291646d1c03cSJan Höppner retry = 1; 291746d1c03cSJan Höppner break; 2918d42e1712SStefan Haberland } 291946d1c03cSJan Höppner goto out_err; 292046d1c03cSJan Höppner } 292146d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2922d42e1712SStefan Haberland 29238fd57520SJan Höppner if (fmt_buffer) { 29248fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 29258fd57520SJan Höppner fmt_buffer += rpt * step; 29268fd57520SJan Höppner } 2927d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2928d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2929d42e1712SStefan Haberland } 2930d42e1712SStefan Haberland 293146d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2932d42e1712SStefan Haberland 293346d1c03cSJan Höppner out_err: 2934d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2935d42e1712SStefan Haberland device = cqr->startdev; 2936543691a4SSebastian Ott private = device->private; 29378fd57520SJan Höppner 29388fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 29398fd57520SJan Höppner /* 29408fd57520SJan Höppner * Only get sense data if called by format 29418fd57520SJan Höppner * check 29428fd57520SJan Höppner */ 29438fd57520SJan Höppner if (fmt_buffer && irb) { 29448fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 29458fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 29468fd57520SJan Höppner } 2947d42e1712SStefan Haberland rc = -EIO; 29488fd57520SJan Höppner } 2949d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 29505e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 2951d42e1712SStefan Haberland private->count--; 2952d42e1712SStefan Haberland } 2953d42e1712SStefan Haberland 29548fd57520SJan Höppner if (rc && rc != -EIO) 295546d1c03cSJan Höppner goto out; 29568fd57520SJan Höppner if (rc == -EIO) { 29578fd57520SJan Höppner /* 29588fd57520SJan Höppner * In case fewer than the expected records are on the 29598fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 29608fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 29618fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 29628fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 29638fd57520SJan Höppner * and continue. 29648fd57520SJan Höppner */ 29658fd57520SJan Höppner if (sense && 29668fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 29678fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 29688fd57520SJan Höppner retry = 1; 29698fd57520SJan Höppner else 29708fd57520SJan Höppner goto out; 29718fd57520SJan Höppner } 297229b8dd9dSStefan Haberland 297346d1c03cSJan Höppner } while (retry); 297446d1c03cSJan Höppner 297546d1c03cSJan Höppner out: 297646d1c03cSJan Höppner fdata->start_unit = old_start; 297746d1c03cSJan Höppner fdata->stop_unit = old_stop; 2978d42e1712SStefan Haberland 2979d42e1712SStefan Haberland return rc; 2980d42e1712SStefan Haberland } 2981d42e1712SStefan Haberland 2982570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2983570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2984570d237cSJan Höppner { 29858fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 29868fd57520SJan Höppner 0, NULL); 29878fd57520SJan Höppner } 29888fd57520SJan Höppner 29898fd57520SJan Höppner /* 29905e2b17e7SJan Höppner * Callback function to free ESE format requests. 29915e2b17e7SJan Höppner */ 29925e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 29935e2b17e7SJan Höppner { 29945e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 29955e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 29965e2b17e7SJan Höppner 29975e2b17e7SJan Höppner private->count--; 29985e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 29995e2b17e7SJan Höppner } 30005e2b17e7SJan Höppner 30015e2b17e7SJan Höppner static struct dasd_ccw_req * 30025e2b17e7SJan Höppner dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr) 30035e2b17e7SJan Höppner { 30045e2b17e7SJan Höppner struct dasd_eckd_private *private; 30055e2b17e7SJan Höppner struct format_data_t fdata; 30065e2b17e7SJan Höppner unsigned int recs_per_trk; 30075e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 30085e2b17e7SJan Höppner struct dasd_device *base; 30095e2b17e7SJan Höppner struct dasd_block *block; 30105e2b17e7SJan Höppner unsigned int blksize; 30115e2b17e7SJan Höppner struct request *req; 30125e2b17e7SJan Höppner sector_t first_trk; 30135e2b17e7SJan Höppner sector_t last_trk; 30145e2b17e7SJan Höppner int rc; 30155e2b17e7SJan Höppner 30165e2b17e7SJan Höppner req = cqr->callback_data; 30175e2b17e7SJan Höppner base = cqr->block->base; 30185e2b17e7SJan Höppner private = base->private; 30195e2b17e7SJan Höppner block = base->block; 30205e2b17e7SJan Höppner blksize = block->bp_block; 30215e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 30225e2b17e7SJan Höppner 30235e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 30245e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 30255e2b17e7SJan Höppner last_trk = 30265e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 30275e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 30285e2b17e7SJan Höppner 30295e2b17e7SJan Höppner fdata.start_unit = first_trk; 30305e2b17e7SJan Höppner fdata.stop_unit = last_trk; 30315e2b17e7SJan Höppner fdata.blksize = blksize; 30325e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 30335e2b17e7SJan Höppner 30345e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 30355e2b17e7SJan Höppner if (rc) 30365e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 30375e2b17e7SJan Höppner 30385e2b17e7SJan Höppner /* 30395e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 30405e2b17e7SJan Höppner * the former startdev. 30415e2b17e7SJan Höppner */ 30425e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 30435e2b17e7SJan Höppner if (IS_ERR(fcqr)) 30445e2b17e7SJan Höppner return fcqr; 30455e2b17e7SJan Höppner 30465e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 30475e2b17e7SJan Höppner 30485e2b17e7SJan Höppner return fcqr; 30495e2b17e7SJan Höppner } 30505e2b17e7SJan Höppner 30515e2b17e7SJan Höppner /* 30525e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 30535e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 30545e2b17e7SJan Höppner */ 30555e2b17e7SJan Höppner static void dasd_eckd_ese_read(struct dasd_ccw_req *cqr) 30565e2b17e7SJan Höppner { 30575e2b17e7SJan Höppner unsigned int blksize, off; 30585e2b17e7SJan Höppner struct dasd_device *base; 30595e2b17e7SJan Höppner struct req_iterator iter; 30605e2b17e7SJan Höppner struct request *req; 30615e2b17e7SJan Höppner struct bio_vec bv; 30625e2b17e7SJan Höppner char *dst; 30635e2b17e7SJan Höppner 30645e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 30655e2b17e7SJan Höppner base = cqr->block->base; 30665e2b17e7SJan Höppner blksize = base->block->bp_block; 30675e2b17e7SJan Höppner 30685e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 30695e2b17e7SJan Höppner dst = page_address(bv.bv_page) + bv.bv_offset; 30705e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 30715e2b17e7SJan Höppner if (dst && rq_data_dir(req) == READ) { 30725e2b17e7SJan Höppner dst += off; 30735e2b17e7SJan Höppner memset(dst, 0, blksize); 30745e2b17e7SJan Höppner } 30755e2b17e7SJan Höppner } 30765e2b17e7SJan Höppner } 30775e2b17e7SJan Höppner } 30785e2b17e7SJan Höppner 30795e2b17e7SJan Höppner /* 30808fd57520SJan Höppner * Helper function to count consecutive records of a single track. 30818fd57520SJan Höppner */ 30828fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 30838fd57520SJan Höppner int max) 30848fd57520SJan Höppner { 30858fd57520SJan Höppner int head; 30868fd57520SJan Höppner int i; 30878fd57520SJan Höppner 30888fd57520SJan Höppner head = fmt_buffer[start].head; 30898fd57520SJan Höppner 30908fd57520SJan Höppner /* 30918fd57520SJan Höppner * There are 3 conditions where we stop counting: 30928fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 30938fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 30948fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 30958fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 30968fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 30978fd57520SJan Höppner * record will be 0 then) 30988fd57520SJan Höppner */ 30998fd57520SJan Höppner for (i = start; i < max; i++) { 31008fd57520SJan Höppner if (i > start) { 31018fd57520SJan Höppner if ((fmt_buffer[i].head == head && 31028fd57520SJan Höppner fmt_buffer[i].record == 1) || 31038fd57520SJan Höppner fmt_buffer[i].head != head || 31048fd57520SJan Höppner fmt_buffer[i].record == 0) 31058fd57520SJan Höppner break; 31068fd57520SJan Höppner } 31078fd57520SJan Höppner } 31088fd57520SJan Höppner 31098fd57520SJan Höppner return i - start; 31108fd57520SJan Höppner } 31118fd57520SJan Höppner 31128fd57520SJan Höppner /* 31138fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 31148fd57520SJan Höppner * record ids, and key length are compared with expected data. 31158fd57520SJan Höppner * 31168fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 31178fd57520SJan Höppner * additional information, depending on the error. 31188fd57520SJan Höppner */ 31198fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 31208fd57520SJan Höppner struct format_check_t *cdata, 31218fd57520SJan Höppner int rpt_max, int rpt_exp, 31228fd57520SJan Höppner int trk_per_cyl, int tpm) 31238fd57520SJan Höppner { 31248fd57520SJan Höppner struct ch_t geo; 31258fd57520SJan Höppner int max_entries; 31268fd57520SJan Höppner int count = 0; 31278fd57520SJan Höppner int trkcount; 31288fd57520SJan Höppner int blksize; 31298fd57520SJan Höppner int pos = 0; 31308fd57520SJan Höppner int i, j; 31318fd57520SJan Höppner int kl; 31328fd57520SJan Höppner 31338fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 31348fd57520SJan Höppner max_entries = trkcount * rpt_max; 31358fd57520SJan Höppner 31368fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 31378fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 31388fd57520SJan Höppner if (tpm) { 31398fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 31408fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 31418fd57520SJan Höppner if (pos++ > max_entries) 31428fd57520SJan Höppner break; 31438fd57520SJan Höppner } 31448fd57520SJan Höppner } else { 31458fd57520SJan Höppner if (i != cdata->expect.start_unit) 31468fd57520SJan Höppner pos += rpt_max - count; 31478fd57520SJan Höppner } 31488fd57520SJan Höppner 31498fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 31508fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 31518fd57520SJan Höppner 31528fd57520SJan Höppner /* Count and check number of records */ 31538fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 31548fd57520SJan Höppner 31558fd57520SJan Höppner if (count < rpt_exp) { 31568fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 31578fd57520SJan Höppner break; 31588fd57520SJan Höppner } 31598fd57520SJan Höppner if (count > rpt_exp) { 31608fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 31618fd57520SJan Höppner break; 31628fd57520SJan Höppner } 31638fd57520SJan Höppner 31648fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 31658fd57520SJan Höppner blksize = cdata->expect.blksize; 31668fd57520SJan Höppner kl = 0; 31678fd57520SJan Höppner 31688fd57520SJan Höppner /* 31698fd57520SJan Höppner * Set special values when checking CDL formatted 31708fd57520SJan Höppner * devices. 31718fd57520SJan Höppner */ 31728fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 31738fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 31748fd57520SJan Höppner if (j < 3) { 31758fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 31768fd57520SJan Höppner kl = 4; 31778fd57520SJan Höppner } 31788fd57520SJan Höppner } 31798fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 31808fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 31818fd57520SJan Höppner blksize = LABEL_SIZE - 44; 31828fd57520SJan Höppner kl = 44; 31838fd57520SJan Höppner } 31848fd57520SJan Höppner 31858fd57520SJan Höppner /* Check blocksize */ 31868fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 31878fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 31888fd57520SJan Höppner goto out; 31898fd57520SJan Höppner } 31908fd57520SJan Höppner /* Check if key length is 0 */ 31918fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 31928fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 31938fd57520SJan Höppner goto out; 31948fd57520SJan Höppner } 31958fd57520SJan Höppner /* Check if record_id is correct */ 31968fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 31978fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 31988fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 31998fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 32008fd57520SJan Höppner goto out; 32018fd57520SJan Höppner } 32028fd57520SJan Höppner } 32038fd57520SJan Höppner } 32048fd57520SJan Höppner 32058fd57520SJan Höppner out: 32068fd57520SJan Höppner /* 32078fd57520SJan Höppner * In case of no errors, we need to decrease by one 32088fd57520SJan Höppner * to get the correct positions. 32098fd57520SJan Höppner */ 32108fd57520SJan Höppner if (!cdata->result) { 32118fd57520SJan Höppner i--; 32128fd57520SJan Höppner pos--; 32138fd57520SJan Höppner } 32148fd57520SJan Höppner 32158fd57520SJan Höppner cdata->unit = i; 32168fd57520SJan Höppner cdata->num_records = count; 32178fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 32188fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 32198fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 32208fd57520SJan Höppner } 32218fd57520SJan Höppner 32228fd57520SJan Höppner /* 32238fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 32248fd57520SJan Höppner */ 32258fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 32268fd57520SJan Höppner struct format_check_t *cdata, 32278fd57520SJan Höppner int enable_pav) 32288fd57520SJan Höppner { 32298fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 32308fd57520SJan Höppner struct eckd_count *fmt_buffer; 32318fd57520SJan Höppner struct irb irb; 32328fd57520SJan Höppner int rpt_max, rpt_exp; 32338fd57520SJan Höppner int fmt_buffer_size; 32348fd57520SJan Höppner int trk_per_cyl; 32358fd57520SJan Höppner int trkcount; 32368fd57520SJan Höppner int tpm = 0; 32378fd57520SJan Höppner int rc; 32388fd57520SJan Höppner 32398fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 32408fd57520SJan Höppner 32418fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 32428fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 32438fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 32448fd57520SJan Höppner 32458fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 32468fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 32478fd57520SJan Höppner 32488fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 32498fd57520SJan Höppner if (!fmt_buffer) 32508fd57520SJan Höppner return -ENOMEM; 32518fd57520SJan Höppner 32528fd57520SJan Höppner /* 32538fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 32548fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 32558fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 32568fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 32578fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 32588fd57520SJan Höppner * processed using command mode. 32598fd57520SJan Höppner */ 32608fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 32618fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 32628fd57520SJan Höppner tpm = 1; 32638fd57520SJan Höppner 32648fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 32658fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 32668fd57520SJan Höppner if (rc && rc != -EIO) 32678fd57520SJan Höppner goto out; 32688fd57520SJan Höppner if (rc == -EIO) { 32698fd57520SJan Höppner /* 32708fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 32718fd57520SJan Höppner * with an incorrect length error, we're going to retry the 32728fd57520SJan Höppner * check with command mode. 32738fd57520SJan Höppner */ 32748fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 32758fd57520SJan Höppner tpm = 0; 32768fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 32778fd57520SJan Höppner enable_pav, tpm, 32788fd57520SJan Höppner fmt_buffer, rpt_max, 32798fd57520SJan Höppner &irb); 32808fd57520SJan Höppner if (rc) 32818fd57520SJan Höppner goto out; 32828fd57520SJan Höppner } else { 32838fd57520SJan Höppner goto out; 32848fd57520SJan Höppner } 32858fd57520SJan Höppner } 32868fd57520SJan Höppner 32878fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 32888fd57520SJan Höppner trk_per_cyl, tpm); 32898fd57520SJan Höppner 32908fd57520SJan Höppner out: 32918fd57520SJan Höppner kfree(fmt_buffer); 32928fd57520SJan Höppner 32938fd57520SJan Höppner return rc; 3294570d237cSJan Höppner } 3295570d237cSJan Höppner 32968e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 32971da177e4SLinus Torvalds { 3298a2ace466SHannes Reinecke if (cqr->retries < 0) { 3299a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3300a2ace466SHannes Reinecke return; 3301a2ace466SHannes Reinecke } 33028e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 33038e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 33048e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 33058e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3306c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 33071da177e4SLinus Torvalds } 33088e09f215SStefan Weinhuber }; 33091da177e4SLinus Torvalds 33101da177e4SLinus Torvalds static dasd_erp_fn_t 33111da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 33121da177e4SLinus Torvalds { 33138e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 33141da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 33151da177e4SLinus Torvalds 33161da177e4SLinus Torvalds switch (cdev->id.cu_type) { 33171da177e4SLinus Torvalds case 0x3990: 33181da177e4SLinus Torvalds case 0x2105: 33191da177e4SLinus Torvalds case 0x2107: 33201da177e4SLinus Torvalds case 0x1750: 33211da177e4SLinus Torvalds return dasd_3990_erp_action; 33221da177e4SLinus Torvalds case 0x9343: 33231da177e4SLinus Torvalds case 0x3880: 33241da177e4SLinus Torvalds default: 33251da177e4SLinus Torvalds return dasd_default_erp_action; 33261da177e4SLinus Torvalds } 33271da177e4SLinus Torvalds } 33281da177e4SLinus Torvalds 33291da177e4SLinus Torvalds static dasd_erp_fn_t 33301da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 33311da177e4SLinus Torvalds { 33321da177e4SLinus Torvalds return dasd_default_erp_postaction; 33331da177e4SLinus Torvalds } 33341da177e4SLinus Torvalds 33355a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 33365a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 33378e09f215SStefan Weinhuber struct irb *irb) 33388e09f215SStefan Weinhuber { 33398e09f215SStefan Weinhuber char mask; 3340f3eb5384SStefan Weinhuber char *sense = NULL; 3341543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 33428e09f215SStefan Weinhuber 33438e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 33448e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3345f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3346c8d1c0ffSStefan Haberland /* 3347c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3348c8d1c0ffSStefan Haberland * and only if not suspended 3349c8d1c0ffSStefan Haberland */ 3350501183f2SStefan Haberland if (!device->block && private->lcu && 335125e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3352c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3353c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3354501183f2SStefan Haberland /* schedule worker to reload device */ 3355501183f2SStefan Haberland dasd_reload_device(device); 3356501183f2SStefan Haberland } 33578e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 33588e09f215SStefan Weinhuber return; 33598e09f215SStefan Weinhuber } 33608e09f215SStefan Weinhuber 3361a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 33625a27e60dSStefan Weinhuber if (!sense) 33635a27e60dSStefan Weinhuber return; 33645a27e60dSStefan Weinhuber 33655a27e60dSStefan Weinhuber /* summary unit check */ 3366c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3367a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 336859a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 336959a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 337059a9ed5fSStefan Haberland "eckd suc: device already notified"); 337159a9ed5fSStefan Haberland return; 337259a9ed5fSStefan Haberland } 337359a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 337459a9ed5fSStefan Haberland if (!sense) { 337559a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 337659a9ed5fSStefan Haberland "eckd suc: no reason code available"); 337759a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 337859a9ed5fSStefan Haberland return; 337959a9ed5fSStefan Haberland 338059a9ed5fSStefan Haberland } 338159a9ed5fSStefan Haberland private->suc_reason = sense[8]; 338259a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 338359a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 338459a9ed5fSStefan Haberland private->suc_reason); 338559a9ed5fSStefan Haberland dasd_get_device(device); 338659a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 338759a9ed5fSStefan Haberland dasd_put_device(device); 338859a9ed5fSStefan Haberland 33898e09f215SStefan Weinhuber return; 33908e09f215SStefan Weinhuber } 33918e09f215SStefan Weinhuber 3392f60c768cSStefan Haberland /* service information message SIM */ 33935a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3394f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3395f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3396f60c768cSStefan Haberland return; 3397f60c768cSStefan Haberland } 3398f60c768cSStefan Haberland 33995a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 34005a27e60dSStefan Weinhuber * as alias devices may be used with several bases 34015a27e60dSStefan Weinhuber */ 3402c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3403c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 34045a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 34055a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 34065a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 34075a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 34085a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34095a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 34105a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3411ada3df91SStefan Haberland } 34125a27e60dSStefan Weinhuber } 3413f3eb5384SStefan Weinhuber 341491dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 341591dc4a19SJan Höppner unsigned int first_trk, 341691dc4a19SJan Höppner unsigned int last_trk) 341791dc4a19SJan Höppner { 341891dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 341991dc4a19SJan Höppner unsigned int trks_per_vol; 342091dc4a19SJan Höppner int rc = 0; 342191dc4a19SJan Höppner 342291dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 342391dc4a19SJan Höppner 342491dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 342591dc4a19SJan Höppner dev_warn(&device->cdev->dev, 342691dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 342791dc4a19SJan Höppner first_trk); 342891dc4a19SJan Höppner rc = -EINVAL; 342991dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 343091dc4a19SJan Höppner dev_warn(&device->cdev->dev, 343191dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 343291dc4a19SJan Höppner last_trk); 343391dc4a19SJan Höppner rc = -EINVAL; 343491dc4a19SJan Höppner } else if (first_trk > last_trk) { 343591dc4a19SJan Höppner dev_warn(&device->cdev->dev, 343691dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 343791dc4a19SJan Höppner first_trk); 343891dc4a19SJan Höppner rc = -EINVAL; 343991dc4a19SJan Höppner } 344091dc4a19SJan Höppner return rc; 344191dc4a19SJan Höppner } 344291dc4a19SJan Höppner 344391dc4a19SJan Höppner /* 344491dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 344591dc4a19SJan Höppner * with extent alignment in mind. 344691dc4a19SJan Höppner */ 344791dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 344891dc4a19SJan Höppner { 344991dc4a19SJan Höppner int cur_pos = 0; 345091dc4a19SJan Höppner int count = 0; 345191dc4a19SJan Höppner int tmp; 345291dc4a19SJan Höppner 345391dc4a19SJan Höppner if (from == to) 345491dc4a19SJan Höppner return 1; 345591dc4a19SJan Höppner 345691dc4a19SJan Höppner /* Count first partial extent */ 345791dc4a19SJan Höppner if (from % trks_per_ext != 0) { 345891dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 345991dc4a19SJan Höppner if (tmp > to) 346091dc4a19SJan Höppner tmp = to; 346191dc4a19SJan Höppner cur_pos = tmp - from + 1; 346291dc4a19SJan Höppner count++; 346391dc4a19SJan Höppner } 346491dc4a19SJan Höppner /* Count full extents */ 346591dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 346691dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 346791dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 346891dc4a19SJan Höppner cur_pos = tmp; 346991dc4a19SJan Höppner } 347091dc4a19SJan Höppner /* Count last partial extent */ 347191dc4a19SJan Höppner if (cur_pos < to) 347291dc4a19SJan Höppner count++; 347391dc4a19SJan Höppner 347491dc4a19SJan Höppner return count; 347591dc4a19SJan Höppner } 347691dc4a19SJan Höppner 347791dc4a19SJan Höppner /* 347891dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 347991dc4a19SJan Höppner */ 348091dc4a19SJan Höppner static struct dasd_ccw_req * 348191dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 348291dc4a19SJan Höppner struct request *req, unsigned int first_trk, 348391dc4a19SJan Höppner unsigned int last_trk, int by_extent) 348491dc4a19SJan Höppner { 348591dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 348691dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 348791dc4a19SJan Höppner struct dasd_rssd_features *features; 348891dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 348991dc4a19SJan Höppner u16 heads, beg_head, end_head; 349091dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 349191dc4a19SJan Höppner struct dasd_ccw_req *cqr; 349291dc4a19SJan Höppner u32 beg_cyl, end_cyl; 349391dc4a19SJan Höppner struct ccw1 *ccw; 349491dc4a19SJan Höppner int trks_per_ext; 349591dc4a19SJan Höppner size_t ras_size; 349691dc4a19SJan Höppner size_t size; 349791dc4a19SJan Höppner int nr_exts; 349891dc4a19SJan Höppner void *rq; 349991dc4a19SJan Höppner int i; 350091dc4a19SJan Höppner 350191dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 350291dc4a19SJan Höppner return ERR_PTR(-EINVAL); 350391dc4a19SJan Höppner 350491dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 350591dc4a19SJan Höppner 350691dc4a19SJan Höppner features = &private->features; 350791dc4a19SJan Höppner 350891dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 350991dc4a19SJan Höppner nr_exts = 0; 351091dc4a19SJan Höppner if (by_extent) 351191dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 351291dc4a19SJan Höppner ras_size = sizeof(*ras_data); 351391dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 351491dc4a19SJan Höppner 351591dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 351691dc4a19SJan Höppner if (IS_ERR(cqr)) { 351791dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 351891dc4a19SJan Höppner "Could not allocate RAS request"); 351991dc4a19SJan Höppner return cqr; 352091dc4a19SJan Höppner } 352191dc4a19SJan Höppner 352291dc4a19SJan Höppner ras_data = cqr->data; 352391dc4a19SJan Höppner memset(ras_data, 0, size); 352491dc4a19SJan Höppner 352591dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 352691dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 352791dc4a19SJan Höppner /* Release specified extents or entire volume */ 352891dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 352991dc4a19SJan Höppner /* 353091dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 353191dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 353291dc4a19SJan Höppner * subset. 353391dc4a19SJan Höppner */ 353491dc4a19SJan Höppner ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 353591dc4a19SJan Höppner ras_data->lss = private->ned->ID; 353691dc4a19SJan Höppner ras_data->dev_addr = private->ned->unit_addr; 353791dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 353891dc4a19SJan Höppner 353991dc4a19SJan Höppner if (by_extent) { 354091dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 354191dc4a19SJan Höppner cur_from_trk = first_trk; 354291dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 354391dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 354491dc4a19SJan Höppner if (cur_to_trk > last_trk) 354591dc4a19SJan Höppner cur_to_trk = last_trk; 354691dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 354791dc4a19SJan Höppner 354891dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 354991dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 355091dc4a19SJan Höppner beg_head = cur_from_trk % heads; 355191dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 355291dc4a19SJan Höppner end_head = cur_to_trk % heads; 355391dc4a19SJan Höppner 355491dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 355591dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 355691dc4a19SJan Höppner 355791dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 355891dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 355991dc4a19SJan Höppner if (cur_to_trk > last_trk) 356091dc4a19SJan Höppner cur_to_trk = last_trk; 356191dc4a19SJan Höppner ras_range++; 356291dc4a19SJan Höppner } 356391dc4a19SJan Höppner } 356491dc4a19SJan Höppner 356591dc4a19SJan Höppner ccw = cqr->cpaddr; 356691dc4a19SJan Höppner ccw->cda = (__u32)(addr_t)cqr->data; 356791dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 356891dc4a19SJan Höppner ccw->count = size; 356991dc4a19SJan Höppner 357091dc4a19SJan Höppner cqr->startdev = device; 357191dc4a19SJan Höppner cqr->memdev = device; 357291dc4a19SJan Höppner cqr->block = block; 357391dc4a19SJan Höppner cqr->retries = 256; 357491dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 357591dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 357691dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 357791dc4a19SJan Höppner 357891dc4a19SJan Höppner return cqr; 357991dc4a19SJan Höppner } 358091dc4a19SJan Höppner 358191dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 358291dc4a19SJan Höppner { 358391dc4a19SJan Höppner struct dasd_ccw_req *cqr; 358491dc4a19SJan Höppner int rc; 358591dc4a19SJan Höppner 358691dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 358791dc4a19SJan Höppner if (IS_ERR(cqr)) 358891dc4a19SJan Höppner return PTR_ERR(cqr); 358991dc4a19SJan Höppner 359091dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 359191dc4a19SJan Höppner 359291dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 359391dc4a19SJan Höppner 359491dc4a19SJan Höppner return rc; 359591dc4a19SJan Höppner } 359691dc4a19SJan Höppner 359791dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 359891dc4a19SJan Höppner unsigned int from, unsigned int to) 359991dc4a19SJan Höppner { 360091dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 360191dc4a19SJan Höppner struct dasd_block *block = device->block; 360291dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 360391dc4a19SJan Höppner struct list_head ras_queue; 360491dc4a19SJan Höppner unsigned int device_exts; 360591dc4a19SJan Höppner int trks_per_ext; 360691dc4a19SJan Höppner int stop, step; 360791dc4a19SJan Höppner int cur_pos; 360891dc4a19SJan Höppner int rc = 0; 360991dc4a19SJan Höppner int retry; 361091dc4a19SJan Höppner 361191dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 361291dc4a19SJan Höppner 361391dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 361491dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 361591dc4a19SJan Höppner 361691dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 361791dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 361891dc4a19SJan Höppner cur_pos = from; 361991dc4a19SJan Höppner 362091dc4a19SJan Höppner do { 362191dc4a19SJan Höppner retry = 0; 362291dc4a19SJan Höppner while (cur_pos < to) { 362391dc4a19SJan Höppner stop = cur_pos + step - 362491dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 362591dc4a19SJan Höppner if (stop > to) 362691dc4a19SJan Höppner stop = to; 362791dc4a19SJan Höppner 362891dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 362991dc4a19SJan Höppner if (IS_ERR(cqr)) { 363091dc4a19SJan Höppner rc = PTR_ERR(cqr); 363191dc4a19SJan Höppner if (rc == -ENOMEM) { 363291dc4a19SJan Höppner if (list_empty(&ras_queue)) 363391dc4a19SJan Höppner goto out; 363491dc4a19SJan Höppner retry = 1; 363591dc4a19SJan Höppner break; 363691dc4a19SJan Höppner } 363791dc4a19SJan Höppner goto err_out; 363891dc4a19SJan Höppner } 363991dc4a19SJan Höppner 364091dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 364191dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 364291dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 364391dc4a19SJan Höppner cur_pos = stop + 1; 364491dc4a19SJan Höppner } 364591dc4a19SJan Höppner 364691dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 364791dc4a19SJan Höppner 364891dc4a19SJan Höppner err_out: 364991dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 365091dc4a19SJan Höppner device = cqr->startdev; 365191dc4a19SJan Höppner private = device->private; 365291dc4a19SJan Höppner 365391dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 365491dc4a19SJan Höppner list_del_init(&cqr->blocklist); 365591dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 365691dc4a19SJan Höppner dasd_sfree_request(cqr, device); 365791dc4a19SJan Höppner private->count--; 365891dc4a19SJan Höppner } 365991dc4a19SJan Höppner } while (retry); 366091dc4a19SJan Höppner 366191dc4a19SJan Höppner out: 366291dc4a19SJan Höppner return rc; 366391dc4a19SJan Höppner } 366491dc4a19SJan Höppner 366591dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 366691dc4a19SJan Höppner struct format_data_t *rdata) 366791dc4a19SJan Höppner { 366891dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 366991dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 367091dc4a19SJan Höppner else if (rdata->intensity == 0) 367191dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 367291dc4a19SJan Höppner rdata->stop_unit); 367391dc4a19SJan Höppner else 367491dc4a19SJan Höppner return -EINVAL; 367591dc4a19SJan Höppner } 367691dc4a19SJan Höppner 3677f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3678f3eb5384SStefan Weinhuber struct dasd_device *startdev, 36798e09f215SStefan Weinhuber struct dasd_block *block, 3680f3eb5384SStefan Weinhuber struct request *req, 3681f3eb5384SStefan Weinhuber sector_t first_rec, 3682f3eb5384SStefan Weinhuber sector_t last_rec, 3683f3eb5384SStefan Weinhuber sector_t first_trk, 3684f3eb5384SStefan Weinhuber sector_t last_trk, 3685f3eb5384SStefan Weinhuber unsigned int first_offs, 3686f3eb5384SStefan Weinhuber unsigned int last_offs, 3687f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3688f3eb5384SStefan Weinhuber unsigned int blksize) 36891da177e4SLinus Torvalds { 36901da177e4SLinus Torvalds struct dasd_eckd_private *private; 36911da177e4SLinus Torvalds unsigned long *idaws; 36921da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 36931da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36941da177e4SLinus Torvalds struct ccw1 *ccw; 36955705f702SNeilBrown struct req_iterator iter; 36967988613bSKent Overstreet struct bio_vec bv; 36971da177e4SLinus Torvalds char *dst; 3698f3eb5384SStefan Weinhuber unsigned int off; 36991da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3700f3eb5384SStefan Weinhuber sector_t recid; 37011da177e4SLinus Torvalds unsigned char cmd, rcmd; 37028e09f215SStefan Weinhuber int use_prefix; 37038e09f215SStefan Weinhuber struct dasd_device *basedev; 37041da177e4SLinus Torvalds 37058e09f215SStefan Weinhuber basedev = block->base; 3706543691a4SSebastian Ott private = basedev->private; 37071da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 37081da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 37091da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 37101da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 37111da177e4SLinus Torvalds else 37121da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3713f3eb5384SStefan Weinhuber 37141da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 37151da177e4SLinus Torvalds count = 0; 37161da177e4SLinus Torvalds cidaw = 0; 37175705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 37187988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 37191da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 37201da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 37217988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 37227988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 37237988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 37241da177e4SLinus Torvalds } 37251da177e4SLinus Torvalds /* Paranoia. */ 37261da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 37271da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 37288e09f215SStefan Weinhuber 37298e09f215SStefan Weinhuber /* use the prefix command if available */ 37308e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 37318e09f215SStefan Weinhuber if (use_prefix) { 37328e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 37338e09f215SStefan Weinhuber cplength = 2 + count; 37348e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 37358e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 37368e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 37378e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 37388e09f215SStefan Weinhuber } else { 37391da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 37401da177e4SLinus Torvalds cplength = 2 + count; 37411da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 37428e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 37438e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 37441da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 37458e09f215SStefan Weinhuber } 37461da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 37471da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 37481da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 37491da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 37501da177e4SLinus Torvalds cplength += count; 37511da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 37521da177e4SLinus Torvalds } 37531da177e4SLinus Torvalds /* Allocate the ccw request. */ 375468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3755c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 37561da177e4SLinus Torvalds if (IS_ERR(cqr)) 37571da177e4SLinus Torvalds return cqr; 37581da177e4SLinus Torvalds ccw = cqr->cpaddr; 37598e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 37608e09f215SStefan Weinhuber if (use_prefix) { 37618e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 37628e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 37638e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 37648e09f215SStefan Weinhuber * Try again later. 37658e09f215SStefan Weinhuber */ 37668e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3767d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3768d54853efSMartin Schwidefsky } 37698e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 37708e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 37718e09f215SStefan Weinhuber } else { 37728e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 377345f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 37748e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 37758e09f215SStefan Weinhuber * Try again later. 37768e09f215SStefan Weinhuber */ 37778e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 37788e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 37798e09f215SStefan Weinhuber } 37808e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 37818e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 37828e09f215SStefan Weinhuber } 37831da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 37841da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 37851da177e4SLinus Torvalds recid = first_rec; 37861da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 37871da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 37881da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 37891da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 37908e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 37911da177e4SLinus Torvalds } 37925705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 37937988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 37941da177e4SLinus Torvalds if (dasd_page_cache) { 37951da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3796441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 37971da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 37987988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 37991da177e4SLinus Torvalds if (copy) 38007988613bSKent Overstreet dst = copy + bv.bv_offset; 38011da177e4SLinus Torvalds } 38027988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 38031da177e4SLinus Torvalds sector_t trkid = recid; 38041da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 38051da177e4SLinus Torvalds rcmd = cmd; 38061da177e4SLinus Torvalds count = blksize; 38071da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 38081da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 38091da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 38101da177e4SLinus Torvalds rcmd |= 0x8; 38111da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3812ec5883abSHorst Hummel if (count < blksize && 3813ec5883abSHorst Hummel rq_data_dir(req) == READ) 38141da177e4SLinus Torvalds memset(dst + count, 0xe5, 38151da177e4SLinus Torvalds blksize - count); 38161da177e4SLinus Torvalds } 38171da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 38181da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 38191da177e4SLinus Torvalds trkid, recoffs + 1, 38208e09f215SStefan Weinhuber 1, rcmd, basedev, count); 38211da177e4SLinus Torvalds } 38221da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 38231da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 38241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 38251da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 38261da177e4SLinus Torvalds trkid, recoffs + 1, 38271da177e4SLinus Torvalds last_rec - recid + 1, 38288e09f215SStefan Weinhuber cmd, basedev, count); 38291da177e4SLinus Torvalds } 38301da177e4SLinus Torvalds /* Read/write ccw. */ 38311da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 38321da177e4SLinus Torvalds ccw->cmd_code = rcmd; 38331da177e4SLinus Torvalds ccw->count = count; 38341da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 38351da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 38361da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 38371da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 38381da177e4SLinus Torvalds } else { 38391da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 38401da177e4SLinus Torvalds ccw->flags = 0; 38411da177e4SLinus Torvalds } 38421da177e4SLinus Torvalds ccw++; 38431da177e4SLinus Torvalds dst += blksize; 38441da177e4SLinus Torvalds recid++; 38451da177e4SLinus Torvalds } 38461da177e4SLinus Torvalds } 384713de227bSHolger Smolinski if (blk_noretry_request(req) || 384813de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 38491c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 38508e09f215SStefan Weinhuber cqr->startdev = startdev; 38518e09f215SStefan Weinhuber cqr->memdev = startdev; 38528e09f215SStefan Weinhuber cqr->block = block; 38537c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3854c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 38551f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 38561aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 38571da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 38585e2b17e7SJan Höppner 38595e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 38605e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 38615e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 38625e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 38635e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 38645e2b17e7SJan Höppner } 38655e2b17e7SJan Höppner 38661da177e4SLinus Torvalds return cqr; 38671da177e4SLinus Torvalds } 38681da177e4SLinus Torvalds 3869f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3870f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3871f3eb5384SStefan Weinhuber struct dasd_block *block, 3872f3eb5384SStefan Weinhuber struct request *req, 3873f3eb5384SStefan Weinhuber sector_t first_rec, 3874f3eb5384SStefan Weinhuber sector_t last_rec, 3875f3eb5384SStefan Weinhuber sector_t first_trk, 3876f3eb5384SStefan Weinhuber sector_t last_trk, 3877f3eb5384SStefan Weinhuber unsigned int first_offs, 3878f3eb5384SStefan Weinhuber unsigned int last_offs, 3879f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3880f3eb5384SStefan Weinhuber unsigned int blksize) 3881f3eb5384SStefan Weinhuber { 3882f3eb5384SStefan Weinhuber unsigned long *idaws; 3883f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3884f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3885f3eb5384SStefan Weinhuber struct req_iterator iter; 38867988613bSKent Overstreet struct bio_vec bv; 3887f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3888f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3889f3eb5384SStefan Weinhuber unsigned int tlf; 3890f3eb5384SStefan Weinhuber sector_t recid; 3891f3eb5384SStefan Weinhuber unsigned char cmd; 3892f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3893f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3894f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3895f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3896f3eb5384SStefan Weinhuber sector_t trkid; 3897f3eb5384SStefan Weinhuber unsigned int recoffs; 3898f3eb5384SStefan Weinhuber 3899f3eb5384SStefan Weinhuber basedev = block->base; 3900f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3901f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3902f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3903f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3904f3eb5384SStefan Weinhuber else 3905f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3906f3eb5384SStefan Weinhuber 3907f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3908f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3909f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3910f3eb5384SStefan Weinhuber * of records as upper limit. 3911f3eb5384SStefan Weinhuber */ 3912f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3913f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3914f3eb5384SStefan Weinhuber 3915f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3916f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3917f3eb5384SStefan Weinhuber 39187bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 3919f3eb5384SStefan Weinhuber 3920f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 392168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3922c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 3923f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3924f3eb5384SStefan Weinhuber return cqr; 3925f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3926f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3927f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3928f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3929f3eb5384SStefan Weinhuber else 3930f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3931f3eb5384SStefan Weinhuber tlf *= blksize; 3932f3eb5384SStefan Weinhuber 3933f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3934f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3935f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3936f3eb5384SStefan Weinhuber trkcount, blksize, 3937f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3938f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3939f3eb5384SStefan Weinhuber * Try again later. 3940f3eb5384SStefan Weinhuber */ 3941f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3942f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3943f3eb5384SStefan Weinhuber } 3944f3eb5384SStefan Weinhuber 3945f3eb5384SStefan Weinhuber /* 3946f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3947f3eb5384SStefan Weinhuber * following conditions: 3948f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3949f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3950f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3951f3eb5384SStefan Weinhuber */ 3952f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3953f3eb5384SStefan Weinhuber recid = first_rec; 3954f3eb5384SStefan Weinhuber new_track = 1; 3955f3eb5384SStefan Weinhuber end_idaw = 0; 3956f3eb5384SStefan Weinhuber len_to_track_end = 0; 3957246ccea1SMartin Schwidefsky idaw_dst = NULL; 3958f3eb5384SStefan Weinhuber idaw_len = 0; 3959f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 39607988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39617988613bSKent Overstreet seg_len = bv.bv_len; 3962f3eb5384SStefan Weinhuber while (seg_len) { 3963f3eb5384SStefan Weinhuber if (new_track) { 3964f3eb5384SStefan Weinhuber trkid = recid; 3965f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3966f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3967f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3968f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3969f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3970f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3971f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3972f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3973f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3974f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3975f3eb5384SStefan Weinhuber ccw++; 3976f3eb5384SStefan Weinhuber recid += count; 3977f3eb5384SStefan Weinhuber new_track = 0; 397852db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 397952db45c3SStefan Weinhuber if (!idaw_dst) 398052db45c3SStefan Weinhuber idaw_dst = dst; 3981f3eb5384SStefan Weinhuber } 398252db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 398352db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3984f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3985f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3986f3eb5384SStefan Weinhuber * idaw ends 3987f3eb5384SStefan Weinhuber */ 398852db45c3SStefan Weinhuber if (!idaw_dst) { 398952db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 399052db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 399152db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 399252db45c3SStefan Weinhuber } else 3993f3eb5384SStefan Weinhuber idaw_dst = dst; 399452db45c3SStefan Weinhuber } 3995f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3996f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3997f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3998f3eb5384SStefan Weinhuber } 3999f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4000f3eb5384SStefan Weinhuber seg_len -= part_len; 4001f3eb5384SStefan Weinhuber dst += part_len; 4002f3eb5384SStefan Weinhuber idaw_len += part_len; 4003f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 4004f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 4005f3eb5384SStefan Weinhuber * -> create an idaw 4006f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 4007f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 4008f3eb5384SStefan Weinhuber */ 4009f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4010f3eb5384SStefan Weinhuber end_idaw = 1; 4011f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 4012f3eb5384SStefan Weinhuber if (!len_to_track_end) { 4013f3eb5384SStefan Weinhuber new_track = 1; 4014f3eb5384SStefan Weinhuber end_idaw = 1; 4015f3eb5384SStefan Weinhuber } 4016f3eb5384SStefan Weinhuber if (end_idaw) { 4017f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 4018f3eb5384SStefan Weinhuber idaw_len); 4019246ccea1SMartin Schwidefsky idaw_dst = NULL; 4020f3eb5384SStefan Weinhuber idaw_len = 0; 4021f3eb5384SStefan Weinhuber end_idaw = 0; 4022f3eb5384SStefan Weinhuber } 4023f3eb5384SStefan Weinhuber } 4024f3eb5384SStefan Weinhuber } 4025f3eb5384SStefan Weinhuber 4026f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4027f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4028f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4029f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4030f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4031f3eb5384SStefan Weinhuber cqr->block = block; 40327c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4033c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 40341f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 40351aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4036f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 40375e2b17e7SJan Höppner 40385e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 40395e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 40405e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 40415e2b17e7SJan Höppner 4042f3eb5384SStefan Weinhuber return cqr; 4043f3eb5384SStefan Weinhuber } 4044f3eb5384SStefan Weinhuber 4045f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4046f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4047f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4048f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4049f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4050f3eb5384SStefan Weinhuber unsigned int blksize, 4051f3eb5384SStefan Weinhuber unsigned int total_data_size, 4052f3eb5384SStefan Weinhuber unsigned int tlf, 4053f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4054f3eb5384SStefan Weinhuber { 4055f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4056f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4057f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4058f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4059f3eb5384SStefan Weinhuber struct dcw *dcw; 4060f3eb5384SStefan Weinhuber 4061f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4062f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4063f3eb5384SStefan Weinhuber u8 pfx_cmd; 4064f3eb5384SStefan Weinhuber 4065f3eb5384SStefan Weinhuber int rc = 0; 4066f3eb5384SStefan Weinhuber int sector = 0; 4067f3eb5384SStefan Weinhuber int dn, d; 4068f3eb5384SStefan Weinhuber 4069f3eb5384SStefan Weinhuber 4070f3eb5384SStefan Weinhuber /* setup prefix data */ 4071543691a4SSebastian Ott basepriv = basedev->private; 4072543691a4SSebastian Ott startpriv = startdev->private; 4073f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4074f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4075f3eb5384SStefan Weinhuber 4076f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4077f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4078f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 4079f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 4080f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4081f3eb5384SStefan Weinhuber 4082f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4083da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4084f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4085da340f92SStefan Haberland 4086da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4087da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4088f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4089f3eb5384SStefan Weinhuber } 4090f3eb5384SStefan Weinhuber 4091f3eb5384SStefan Weinhuber switch (cmd) { 4092f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4093f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4094f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4095f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4096f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4097f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4098f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4099f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4100f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4101f3eb5384SStefan Weinhuber break; 4102f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4103f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4104f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4105f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 41065628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4107f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4108f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4109f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4110f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4111f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 411245f186beSJan Höppner /* 411345f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 411445f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 411545f186beSJan Höppner * data as well. 411645f186beSJan Höppner */ 411745f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 411845f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4119f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4120f3eb5384SStefan Weinhuber break; 41218fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 41228fd57520SJan Höppner dedata->mask.perm = 0x1; 41238fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 41248fd57520SJan Höppner dedata->ga_extended |= 0x42; 41258fd57520SJan Höppner dedata->blk_size = blksize; 41268fd57520SJan Höppner lredata->operation.orientation = 0x2; 41278fd57520SJan Höppner lredata->operation.operation = 0x16; 41288fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 41298fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 41308fd57520SJan Höppner break; 4131f3eb5384SStefan Weinhuber default: 4132f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4133f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4134f3eb5384SStefan Weinhuber BUG(); 4135f3eb5384SStefan Weinhuber break; 4136f3eb5384SStefan Weinhuber } 4137f3eb5384SStefan Weinhuber if (rc) 4138f3eb5384SStefan Weinhuber return rc; 4139f3eb5384SStefan Weinhuber 4140f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4141f3eb5384SStefan Weinhuber 4142f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4143f3eb5384SStefan Weinhuber begcyl = trk / heads; 4144f3eb5384SStefan Weinhuber beghead = trk % heads; 4145f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4146f3eb5384SStefan Weinhuber endhead = totrk % heads; 4147f3eb5384SStefan Weinhuber 4148f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4149f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4150f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4151f3eb5384SStefan Weinhuber 4152f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4153f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4154f3eb5384SStefan Weinhuber else 4155f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4156f3eb5384SStefan Weinhuber } 4157f3eb5384SStefan Weinhuber 4158f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4159f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4160f3eb5384SStefan Weinhuber 4161f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4162f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4163f3eb5384SStefan Weinhuber 4164f3eb5384SStefan Weinhuber if (rec_on_trk) { 4165f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4166f3eb5384SStefan Weinhuber case 0x3390: 4167f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4168f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4169f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4170f3eb5384SStefan Weinhuber break; 4171f3eb5384SStefan Weinhuber case 0x3380: 4172f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4173f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4174f3eb5384SStefan Weinhuber break; 4175f3eb5384SStefan Weinhuber } 4176f3eb5384SStefan Weinhuber } 4177f3eb5384SStefan Weinhuber 41788fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 41798fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 41808fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 41818fd57520SJan Höppner lredata->sector = 0xff; 41828fd57520SJan Höppner } else { 4183f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4184f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 41858fd57520SJan Höppner lredata->sector = sector; 41868fd57520SJan Höppner } 4187f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4188f3eb5384SStefan Weinhuber lredata->length = tlf; 4189f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4190f3eb5384SStefan Weinhuber lredata->count = count; 4191f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4192f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4193f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4194f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4195f3eb5384SStefan Weinhuber 4196f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4197f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4198757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4199f3eb5384SStefan Weinhuber } 4200f3eb5384SStefan Weinhuber 4201f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4202f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4203f3eb5384SStefan Weinhuber struct dasd_block *block, 4204f3eb5384SStefan Weinhuber struct request *req, 4205f3eb5384SStefan Weinhuber sector_t first_rec, 4206f3eb5384SStefan Weinhuber sector_t last_rec, 4207f3eb5384SStefan Weinhuber sector_t first_trk, 4208f3eb5384SStefan Weinhuber sector_t last_trk, 4209f3eb5384SStefan Weinhuber unsigned int first_offs, 4210f3eb5384SStefan Weinhuber unsigned int last_offs, 4211f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4212f3eb5384SStefan Weinhuber unsigned int blksize) 4213f3eb5384SStefan Weinhuber { 4214f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4215f3eb5384SStefan Weinhuber struct req_iterator iter; 42167988613bSKent Overstreet struct bio_vec bv; 4217f3eb5384SStefan Weinhuber char *dst; 4218f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4219f3eb5384SStefan Weinhuber unsigned char cmd; 4220f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4221f3eb5384SStefan Weinhuber unsigned int tlf; 4222f3eb5384SStefan Weinhuber struct itcw *itcw; 4223f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4224f3eb5384SStefan Weinhuber int itcw_op; 4225f3eb5384SStefan Weinhuber size_t itcw_size; 4226ef19298bSStefan Weinhuber u8 tidaw_flags; 4227ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4228ef19298bSStefan Weinhuber unsigned char new_track; 4229ef19298bSStefan Weinhuber sector_t recid, trkid; 4230ef19298bSStefan Weinhuber unsigned int offs; 4231ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4232cd10502bSJulia Lawall int ret; 4233f3eb5384SStefan Weinhuber 4234f3eb5384SStefan Weinhuber basedev = block->base; 4235f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4236f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4237f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4238f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4239f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4240f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4241f3eb5384SStefan Weinhuber } else 4242f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4243f3eb5384SStefan Weinhuber 4244f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4245f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4246f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4247ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4248ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4249f3eb5384SStefan Weinhuber */ 4250f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4251f3eb5384SStefan Weinhuber ctidaw = 0; 4252f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4253f3eb5384SStefan Weinhuber ++ctidaw; 4254f3eb5384SStefan Weinhuber } 4255ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4256ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4257f3eb5384SStefan Weinhuber 4258f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4259f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4260c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4261c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4262f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4263f3eb5384SStefan Weinhuber return cqr; 4264f3eb5384SStefan Weinhuber 4265f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4266f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4267f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4268f3eb5384SStefan Weinhuber else 4269f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4270f3eb5384SStefan Weinhuber tlf *= blksize; 4271f3eb5384SStefan Weinhuber 4272f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4273ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4274cd10502bSJulia Lawall ret = -EINVAL; 4275cd10502bSJulia Lawall goto out_error; 4276ef19298bSStefan Weinhuber } 4277f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4278f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4279f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4280f3eb5384SStefan Weinhuber first_offs + 1, 4281f3eb5384SStefan Weinhuber trkcount, blksize, 4282f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4283f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4284f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4285f3eb5384SStefan Weinhuber * Try again later. 4286f3eb5384SStefan Weinhuber */ 4287cd10502bSJulia Lawall ret = -EAGAIN; 4288cd10502bSJulia Lawall goto out_error; 4289f3eb5384SStefan Weinhuber } 4290d54cddb6SHeiko Carstens len_to_track_end = 0; 4291f3eb5384SStefan Weinhuber /* 4292f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4293f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4294f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4295f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4296ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4297ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4298f3eb5384SStefan Weinhuber */ 4299ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4300ef19298bSStefan Weinhuber new_track = 1; 4301ef19298bSStefan Weinhuber recid = first_rec; 4302f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 43037988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 43047988613bSKent Overstreet seg_len = bv.bv_len; 4305ef19298bSStefan Weinhuber while (seg_len) { 4306ef19298bSStefan Weinhuber if (new_track) { 4307ef19298bSStefan Weinhuber trkid = recid; 4308ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4309ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4310ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4311ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4312ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4313ef19298bSStefan Weinhuber recid += count; 4314ef19298bSStefan Weinhuber new_track = 0; 4315f3eb5384SStefan Weinhuber } 4316ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4317ef19298bSStefan Weinhuber seg_len -= part_len; 4318ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4319ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4320ef19298bSStefan Weinhuber if (!len_to_track_end) { 4321ef19298bSStefan Weinhuber new_track = 1; 4322ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4323ef19298bSStefan Weinhuber } else 4324ef19298bSStefan Weinhuber tidaw_flags = 0; 4325ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4326ef19298bSStefan Weinhuber dst, part_len); 4327cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4328cd10502bSJulia Lawall ret = -EINVAL; 4329cd10502bSJulia Lawall goto out_error; 4330cd10502bSJulia Lawall } 4331ef19298bSStefan Weinhuber dst += part_len; 4332ef19298bSStefan Weinhuber } 4333ef19298bSStefan Weinhuber } 4334ef19298bSStefan Weinhuber } else { 4335ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 43367988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 4337ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 43387988613bSKent Overstreet dst, bv.bv_len); 4339cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4340cd10502bSJulia Lawall ret = -EINVAL; 4341cd10502bSJulia Lawall goto out_error; 4342cd10502bSJulia Lawall } 4343ef19298bSStefan Weinhuber } 4344ef19298bSStefan Weinhuber } 4345ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4346ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4347f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4348f3eb5384SStefan Weinhuber 4349f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4350f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4351f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4352ef19298bSStefan Weinhuber cqr->cpmode = 1; 4353f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4354f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4355f3eb5384SStefan Weinhuber cqr->block = block; 43567c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4357c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 43581f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 43591aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4360f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 43615e2b17e7SJan Höppner 43625e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 43635e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 43645e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 43655e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 43665e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 43675e2b17e7SJan Höppner } 43685e2b17e7SJan Höppner 4369f3eb5384SStefan Weinhuber return cqr; 4370cd10502bSJulia Lawall out_error: 4371cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4372cd10502bSJulia Lawall return ERR_PTR(ret); 4373f3eb5384SStefan Weinhuber } 4374f3eb5384SStefan Weinhuber 4375f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4376f3eb5384SStefan Weinhuber struct dasd_block *block, 4377f3eb5384SStefan Weinhuber struct request *req) 4378f3eb5384SStefan Weinhuber { 4379ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4380f3eb5384SStefan Weinhuber int use_prefix; 4381ef19298bSStefan Weinhuber int fcx_multitrack; 438245b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4383f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4384f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4385f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4386f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4387f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4388f3eb5384SStefan Weinhuber int cdlspecial; 4389ef19298bSStefan Weinhuber unsigned int data_size; 4390f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4391f3eb5384SStefan Weinhuber 4392f3eb5384SStefan Weinhuber basedev = block->base; 4393543691a4SSebastian Ott private = basedev->private; 4394f3eb5384SStefan Weinhuber 4395f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4396f3eb5384SStefan Weinhuber blksize = block->bp_block; 4397f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 43986fca97a9SStefan Haberland if (blk_per_trk == 0) 43996fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4400f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 440183096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4402f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4403f3eb5384SStefan Weinhuber last_rec = last_trk = 440483096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4405f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4406f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4407f3eb5384SStefan Weinhuber 4408ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4409ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 441026a35f37SStefan Weinhuber if (data_size % blksize) 441126a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4412ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4413ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4414ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4415f3eb5384SStefan Weinhuber 4416f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4417f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4418f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4419f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4420f3eb5384SStefan Weinhuber 4421f3eb5384SStefan Weinhuber cqr = NULL; 4422f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4423f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4424ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4425ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4426f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4427f3eb5384SStefan Weinhuber first_rec, last_rec, 4428f3eb5384SStefan Weinhuber first_trk, last_trk, 4429f3eb5384SStefan Weinhuber first_offs, last_offs, 4430f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4431ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4432ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4433f3eb5384SStefan Weinhuber cqr = NULL; 4434f3eb5384SStefan Weinhuber } else if (use_prefix && 4435f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4436f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4437f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4438f3eb5384SStefan Weinhuber first_rec, last_rec, 4439f3eb5384SStefan Weinhuber first_trk, last_trk, 4440f3eb5384SStefan Weinhuber first_offs, last_offs, 4441f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4442ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4443ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4444f3eb5384SStefan Weinhuber cqr = NULL; 4445f3eb5384SStefan Weinhuber } 4446f3eb5384SStefan Weinhuber if (!cqr) 4447f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4448f3eb5384SStefan Weinhuber first_rec, last_rec, 4449f3eb5384SStefan Weinhuber first_trk, last_trk, 4450f3eb5384SStefan Weinhuber first_offs, last_offs, 4451f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4452f3eb5384SStefan Weinhuber return cqr; 4453f3eb5384SStefan Weinhuber } 4454f3eb5384SStefan Weinhuber 4455bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4456e4dbb0f2SStefan Haberland struct dasd_block *block, 4457e4dbb0f2SStefan Haberland struct request *req) 4458e4dbb0f2SStefan Haberland { 44599d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4460e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4461e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4462558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 44639d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 44649d2be0c1SJan Höppner struct dasd_device *basedev; 44659d2be0c1SJan Höppner struct req_iterator iter; 44669d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 44679d2be0c1SJan Höppner unsigned int first_offs; 44689d2be0c1SJan Höppner unsigned int trkcount; 44699d2be0c1SJan Höppner unsigned long *idaws; 44709d2be0c1SJan Höppner unsigned int size; 44719d2be0c1SJan Höppner unsigned char cmd; 44729d2be0c1SJan Höppner struct bio_vec bv; 44739d2be0c1SJan Höppner struct ccw1 *ccw; 44749d2be0c1SJan Höppner int use_prefix; 44759d2be0c1SJan Höppner void *data; 44769d2be0c1SJan Höppner char *dst; 4477e4dbb0f2SStefan Haberland 4478e4dbb0f2SStefan Haberland /* 4479e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4480558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4481558b9ef0SStefan Weinhuber * the request with dummy pages. 4482e4dbb0f2SStefan Haberland */ 4483558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4484558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4485558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4486558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4487558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4488558b9ef0SStefan Weinhuber basedev = block->base; 4489558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4490558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4491558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4492e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4493558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 44949d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4495e4dbb0f2SStefan Haberland } 4496e4dbb0f2SStefan Haberland 4497e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4498e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4499e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4500e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4501e4dbb0f2SStefan Haberland first_offs = 0; 4502e4dbb0f2SStefan Haberland 4503e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4504e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4505e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4506e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 45079d2be0c1SJan Höppner else 45089d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4509e4dbb0f2SStefan Haberland 4510e4dbb0f2SStefan Haberland /* 4511e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4512e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4513e4dbb0f2SStefan Haberland */ 4514e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4515e4dbb0f2SStefan Haberland 4516e4dbb0f2SStefan Haberland /* 45179d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 45189d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4519e4dbb0f2SStefan Haberland */ 45209d2be0c1SJan Höppner base_priv = basedev->private; 45219d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 45229d2be0c1SJan Höppner if (use_prefix) { 45239d2be0c1SJan Höppner cplength = 1 + trkcount; 45249d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 45259d2be0c1SJan Höppner } else { 45269d2be0c1SJan Höppner cplength = 2 + trkcount; 45279d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 45289d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 45299d2be0c1SJan Höppner } 45309d2be0c1SJan Höppner size = ALIGN(size, 8); 4531e4dbb0f2SStefan Haberland 45327bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4533e4dbb0f2SStefan Haberland 4534e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4535e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4536c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4537e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 45389d2be0c1SJan Höppner return cqr; 4539e4dbb0f2SStefan Haberland 45409d2be0c1SJan Höppner ccw = cqr->cpaddr; 45419d2be0c1SJan Höppner data = cqr->data; 45429d2be0c1SJan Höppner 45439d2be0c1SJan Höppner if (use_prefix) { 45449d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 45459d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 45469d2be0c1SJan Höppner } else { 45479d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 45489d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 45499d2be0c1SJan Höppner 45509d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 45519d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 45529d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4553e4dbb0f2SStefan Haberland } 4554e4dbb0f2SStefan Haberland 45559d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4556e4dbb0f2SStefan Haberland len_to_track_end = 0; 4557558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4558558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4559558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4560558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4561558b9ef0SStefan Weinhuber ccw->count = 57326; 4562558b9ef0SStefan Weinhuber /* 64k map to one track */ 4563558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4564558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4565558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4566558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4567558b9ef0SStefan Weinhuber ccw++; 4568558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4569558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4570558b9ef0SStefan Weinhuber } 4571e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 45727988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 45737988613bSKent Overstreet seg_len = bv.bv_len; 4574558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4575558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4576e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4577e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4578e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4579e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4580e4dbb0f2SStefan Haberland ccw->count = 57326; 4581e4dbb0f2SStefan Haberland /* 64k map to one track */ 4582e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4583e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4584e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4585e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4586e4dbb0f2SStefan Haberland ccw++; 4587e4dbb0f2SStefan Haberland } 4588e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4589e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4590e4dbb0f2SStefan Haberland } 4591558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4592558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4593e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4594e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4595e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4596e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4597e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4598e4dbb0f2SStefan Haberland cqr->block = block; 4599e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4600c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 46011f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 46021aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4603e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4604e4dbb0f2SStefan Haberland 4605e4dbb0f2SStefan Haberland return cqr; 4606e4dbb0f2SStefan Haberland } 4607e4dbb0f2SStefan Haberland 4608e4dbb0f2SStefan Haberland 46091da177e4SLinus Torvalds static int 46101da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 46111da177e4SLinus Torvalds { 46121da177e4SLinus Torvalds struct dasd_eckd_private *private; 46131da177e4SLinus Torvalds struct ccw1 *ccw; 46145705f702SNeilBrown struct req_iterator iter; 46157988613bSKent Overstreet struct bio_vec bv; 46161da177e4SLinus Torvalds char *dst, *cda; 46171da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 46181da177e4SLinus Torvalds sector_t recid; 46195705f702SNeilBrown int status; 46201da177e4SLinus Torvalds 46211da177e4SLinus Torvalds if (!dasd_page_cache) 46221da177e4SLinus Torvalds goto out; 4623543691a4SSebastian Ott private = cqr->block->base->private; 46248e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 46251da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 462683096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 46271da177e4SLinus Torvalds ccw = cqr->cpaddr; 46281da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 46291da177e4SLinus Torvalds ccw++; 46301da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 46311da177e4SLinus Torvalds ccw++; 46325705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 46337988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 46347988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 46351da177e4SLinus Torvalds /* Skip locate record. */ 46361da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 46371da177e4SLinus Torvalds ccw++; 46381da177e4SLinus Torvalds if (dst) { 46391da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 46401da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 46411da177e4SLinus Torvalds else 46421da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 46431da177e4SLinus Torvalds if (dst != cda) { 46441da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 46457988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 46461da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 46471da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 46481da177e4SLinus Torvalds } 46491da177e4SLinus Torvalds dst = NULL; 46501da177e4SLinus Torvalds } 46511da177e4SLinus Torvalds ccw++; 46521da177e4SLinus Torvalds recid++; 46531da177e4SLinus Torvalds } 46541da177e4SLinus Torvalds } 46551da177e4SLinus Torvalds out: 46561da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 46578e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 46581da177e4SLinus Torvalds return status; 46591da177e4SLinus Torvalds } 46601da177e4SLinus Torvalds 46618e09f215SStefan Weinhuber /* 4662f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 46638e09f215SStefan Weinhuber * 46648e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 46658e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 46668e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 46678e09f215SStefan Weinhuber */ 46688e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 46698e09f215SStefan Weinhuber { 46708e09f215SStefan Weinhuber struct ccw1 *ccw; 46718e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4672f3eb5384SStefan Weinhuber struct tcw *tcw; 4673f3eb5384SStefan Weinhuber struct tccb *tccb; 4674f3eb5384SStefan Weinhuber struct dcw *dcw; 46758e09f215SStefan Weinhuber 4676f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4677f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4678f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4679f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4680f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4681f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4682f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4683f3eb5384SStefan Weinhuber } else { 46848e09f215SStefan Weinhuber ccw = cqr->cpaddr; 46858e09f215SStefan Weinhuber pfxdata = cqr->data; 46868e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 46878e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 46888e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 46898e09f215SStefan Weinhuber } 46908e09f215SStefan Weinhuber } 4691f3eb5384SStefan Weinhuber } 46928e09f215SStefan Weinhuber 46938e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 46948e09f215SStefan Weinhuber 46958e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 46968e09f215SStefan Weinhuber struct dasd_block *block, 46978e09f215SStefan Weinhuber struct request *req) 46988e09f215SStefan Weinhuber { 46998e09f215SStefan Weinhuber struct dasd_eckd_private *private; 4700964ce509SStefan Haberland struct dasd_device *startdev; 47017e64db15SJan Höppner unsigned long flags; 4702964ce509SStefan Haberland struct dasd_ccw_req *cqr; 47038e09f215SStefan Weinhuber 47048e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 47058e09f215SStefan Weinhuber if (!startdev) 47068e09f215SStefan Weinhuber startdev = base; 4707543691a4SSebastian Ott private = startdev->private; 47088e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 47098e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 47108e09f215SStefan Weinhuber 47118e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 47128e09f215SStefan Weinhuber private->count++; 4713e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4714bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4715e4dbb0f2SStefan Haberland else 47168e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 47178e09f215SStefan Weinhuber if (IS_ERR(cqr)) 47188e09f215SStefan Weinhuber private->count--; 47198e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 47208e09f215SStefan Weinhuber return cqr; 47218e09f215SStefan Weinhuber } 47228e09f215SStefan Weinhuber 47238e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 47248e09f215SStefan Weinhuber struct request *req) 47258e09f215SStefan Weinhuber { 47268e09f215SStefan Weinhuber struct dasd_eckd_private *private; 47278e09f215SStefan Weinhuber unsigned long flags; 47288e09f215SStefan Weinhuber 47298e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4730543691a4SSebastian Ott private = cqr->memdev->private; 47318e09f215SStefan Weinhuber private->count--; 47328e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 47338e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 47348e09f215SStefan Weinhuber } 47358e09f215SStefan Weinhuber 47361da177e4SLinus Torvalds static int 47371da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 47381da177e4SLinus Torvalds struct dasd_information2_t * info) 47391da177e4SLinus Torvalds { 4740543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 47411da177e4SLinus Torvalds 47421da177e4SLinus Torvalds info->label_block = 2; 47431da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 47441da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4745543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 47461da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4747543691a4SSebastian Ott sizeof(private->rdc_data)); 47484abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 47494abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 47504abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 47514abb08c2SStefan Weinhuber info->confdata_size); 47521da177e4SLinus Torvalds return 0; 47531da177e4SLinus Torvalds } 47541da177e4SLinus Torvalds 47551da177e4SLinus Torvalds /* 47561da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 47571da177e4SLinus Torvalds */ 47581da177e4SLinus Torvalds 47591da177e4SLinus Torvalds /* 47601da177e4SLinus Torvalds * Release device ioctl. 47611da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 47621da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 47631da177e4SLinus Torvalds */ 47641da177e4SLinus Torvalds static int 47651107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 47661da177e4SLinus Torvalds { 47671da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 47681da177e4SLinus Torvalds int rc; 4769f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4770f932bceaSStefan Weinhuber int useglobal; 47711da177e4SLinus Torvalds 47721da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 47731da177e4SLinus Torvalds return -EACCES; 47741da177e4SLinus Torvalds 4775f932bceaSStefan Weinhuber useglobal = 0; 4776c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 47771da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4778f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4779f932bceaSStefan Weinhuber useglobal = 1; 4780f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4781f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4782f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4783f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4784f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4785f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4786f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 47871da177e4SLinus Torvalds } 4788f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4789f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4790f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4791f3eb5384SStefan Weinhuber ccw->count = 32; 4792f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 47938e09f215SStefan Weinhuber cqr->startdev = device; 47948e09f215SStefan Weinhuber cqr->memdev = device; 47951da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 47961c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4797336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 47981da177e4SLinus Torvalds cqr->expires = 2 * HZ; 47991aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 48001da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 48011da177e4SLinus Torvalds 48021da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 48035a27e60dSStefan Weinhuber if (!rc) 48045a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 48051da177e4SLinus Torvalds 4806f932bceaSStefan Weinhuber if (useglobal) 4807f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4808f932bceaSStefan Weinhuber else 48098e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48101da177e4SLinus Torvalds return rc; 48111da177e4SLinus Torvalds } 48121da177e4SLinus Torvalds 48131da177e4SLinus Torvalds /* 48141da177e4SLinus Torvalds * Reserve device ioctl. 48151da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 48161da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 48171da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 48181da177e4SLinus Torvalds */ 48191da177e4SLinus Torvalds static int 48201107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 48211da177e4SLinus Torvalds { 48221da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 48231da177e4SLinus Torvalds int rc; 4824f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4825f932bceaSStefan Weinhuber int useglobal; 48261da177e4SLinus Torvalds 48271da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 48281da177e4SLinus Torvalds return -EACCES; 48291da177e4SLinus Torvalds 4830f932bceaSStefan Weinhuber useglobal = 0; 4831c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 48321da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4833f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4834f932bceaSStefan Weinhuber useglobal = 1; 4835f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4836f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4837f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4838f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4839f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4840f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4841f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 48421da177e4SLinus Torvalds } 4843f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4844f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4845f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4846f3eb5384SStefan Weinhuber ccw->count = 32; 4847f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 48488e09f215SStefan Weinhuber cqr->startdev = device; 48498e09f215SStefan Weinhuber cqr->memdev = device; 48501da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 48511c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4852336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 48531da177e4SLinus Torvalds cqr->expires = 2 * HZ; 48541aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 48551da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 48561da177e4SLinus Torvalds 48571da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 48585a27e60dSStefan Weinhuber if (!rc) 48595a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 48601da177e4SLinus Torvalds 4861f932bceaSStefan Weinhuber if (useglobal) 4862f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4863f932bceaSStefan Weinhuber else 48648e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48651da177e4SLinus Torvalds return rc; 48661da177e4SLinus Torvalds } 48671da177e4SLinus Torvalds 48681da177e4SLinus Torvalds /* 48691da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 48701da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 48711da177e4SLinus Torvalds * (unconditional reserve) 48721da177e4SLinus Torvalds */ 48731da177e4SLinus Torvalds static int 48741107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 48751da177e4SLinus Torvalds { 48761da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 48771da177e4SLinus Torvalds int rc; 4878f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4879f932bceaSStefan Weinhuber int useglobal; 48801da177e4SLinus Torvalds 48811da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 48821da177e4SLinus Torvalds return -EACCES; 48831da177e4SLinus Torvalds 4884f932bceaSStefan Weinhuber useglobal = 0; 4885c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 48861da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4887f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4888f932bceaSStefan Weinhuber useglobal = 1; 4889f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4890f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4891f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4892f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4893f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4894f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4895f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 48961da177e4SLinus Torvalds } 4897f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4898f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4899f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4900f3eb5384SStefan Weinhuber ccw->count = 32; 4901f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 49028e09f215SStefan Weinhuber cqr->startdev = device; 49038e09f215SStefan Weinhuber cqr->memdev = device; 49041da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 49051c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4906336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 49071da177e4SLinus Torvalds cqr->expires = 2 * HZ; 49081aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 49091da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 49101da177e4SLinus Torvalds 49111da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 49125a27e60dSStefan Weinhuber if (!rc) 49135a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 49141da177e4SLinus Torvalds 4915f932bceaSStefan Weinhuber if (useglobal) 4916f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4917f932bceaSStefan Weinhuber else 49188e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 49191da177e4SLinus Torvalds return rc; 49201da177e4SLinus Torvalds } 49211da177e4SLinus Torvalds 49221da177e4SLinus Torvalds /* 4923196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4924196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4925196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4926196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4927196339f1SStefan Weinhuber */ 4928196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4929196339f1SStefan Weinhuber void __user *argp) 4930196339f1SStefan Weinhuber { 4931196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4932196339f1SStefan Weinhuber int rc; 4933196339f1SStefan Weinhuber struct ccw1 *ccw; 4934196339f1SStefan Weinhuber int useglobal; 4935196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4936196339f1SStefan Weinhuber 4937196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4938196339f1SStefan Weinhuber return -EACCES; 4939196339f1SStefan Weinhuber 4940196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4941196339f1SStefan Weinhuber return -EFAULT; 4942196339f1SStefan Weinhuber 4943196339f1SStefan Weinhuber useglobal = 0; 4944196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4945c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 4946c5205f2fSSebastian Ott NULL); 4947196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4948196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4949196339f1SStefan Weinhuber useglobal = 1; 4950196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4951196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4952196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4953196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4954196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4955196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4956196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4957196339f1SStefan Weinhuber } 4958196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4959196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4960196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4961196339f1SStefan Weinhuber ccw->count = 12; 4962196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4963196339f1SStefan Weinhuber cqr->startdev = device; 4964196339f1SStefan Weinhuber cqr->memdev = device; 4965196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4966196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 49675a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4968196339f1SStefan Weinhuber cqr->retries = 5; 4969196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 49701aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4971196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4972196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4973196339f1SStefan Weinhuber 4974196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4975196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4976196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4977196339f1SStefan Weinhuber rc = -EIO; 4978196339f1SStefan Weinhuber if (!rc) { 4979196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4980196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4981196339f1SStefan Weinhuber rc = -EFAULT; 4982196339f1SStefan Weinhuber } 4983196339f1SStefan Weinhuber 4984196339f1SStefan Weinhuber if (useglobal) 4985196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4986196339f1SStefan Weinhuber else 4987196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4988196339f1SStefan Weinhuber return rc; 4989196339f1SStefan Weinhuber } 4990196339f1SStefan Weinhuber 4991196339f1SStefan Weinhuber /* 49921da177e4SLinus Torvalds * Read performance statistics 49931da177e4SLinus Torvalds */ 49941da177e4SLinus Torvalds static int 49951107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 49961da177e4SLinus Torvalds { 49971da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 49981da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 49991da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50001da177e4SLinus Torvalds struct ccw1 *ccw; 50011da177e4SLinus Torvalds int rc; 50021da177e4SLinus Torvalds 500368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 50041da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 50051da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 5006c5205f2fSSebastian Ott device, NULL); 50071da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5008fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 50091da177e4SLinus Torvalds "Could not allocate initialization request"); 50101da177e4SLinus Torvalds return PTR_ERR(cqr); 50111da177e4SLinus Torvalds } 50128e09f215SStefan Weinhuber cqr->startdev = device; 50138e09f215SStefan Weinhuber cqr->memdev = device; 50141da177e4SLinus Torvalds cqr->retries = 0; 5015eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50161da177e4SLinus Torvalds cqr->expires = 10 * HZ; 50171da177e4SLinus Torvalds 50181da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 50191da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50201da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 50211da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 50225d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 50231da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 50241da177e4SLinus Torvalds 50251da177e4SLinus Torvalds ccw = cqr->cpaddr; 50261da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 50271da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 50281da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 50291da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 50301da177e4SLinus Torvalds 50311da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 50321da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 50331da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 50341da177e4SLinus Torvalds 50351da177e4SLinus Torvalds ccw++; 50361da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 50371da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 50381da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 50391da177e4SLinus Torvalds 50401aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50411da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50421da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 50431da177e4SLinus Torvalds if (rc == 0) { 50441da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50451da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 50461107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 50471107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 50481107ccfbSChristoph Hellwig rc = -EFAULT; 50491da177e4SLinus Torvalds } 50508e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50511da177e4SLinus Torvalds return rc; 50521da177e4SLinus Torvalds } 50531da177e4SLinus Torvalds 50541da177e4SLinus Torvalds /* 50551da177e4SLinus Torvalds * Get attributes (cache operations) 50561da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 50571da177e4SLinus Torvalds */ 50581da177e4SLinus Torvalds static int 50591107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 50601da177e4SLinus Torvalds { 5061543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 50621107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 50631da177e4SLinus Torvalds int rc; 50641da177e4SLinus Torvalds 50651da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50661da177e4SLinus Torvalds return -EACCES; 50671107ccfbSChristoph Hellwig if (!argp) 50681da177e4SLinus Torvalds return -EINVAL; 50691da177e4SLinus Torvalds 50701107ccfbSChristoph Hellwig rc = 0; 50711107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 50721107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 50731107ccfbSChristoph Hellwig rc = -EFAULT; 50741da177e4SLinus Torvalds 50751da177e4SLinus Torvalds return rc; 50761da177e4SLinus Torvalds } 50771da177e4SLinus Torvalds 50781da177e4SLinus Torvalds /* 50791da177e4SLinus Torvalds * Set attributes (cache operations) 50801da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 50811da177e4SLinus Torvalds */ 50821da177e4SLinus Torvalds static int 50831107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 50841da177e4SLinus Torvalds { 5085543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 50861da177e4SLinus Torvalds struct attrib_data_t attrib; 50871da177e4SLinus Torvalds 50881da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50891da177e4SLinus Torvalds return -EACCES; 50901107ccfbSChristoph Hellwig if (!argp) 50911da177e4SLinus Torvalds return -EINVAL; 50921da177e4SLinus Torvalds 50931107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 50941da177e4SLinus Torvalds return -EFAULT; 50951da177e4SLinus Torvalds private->attrib = attrib; 50961da177e4SLinus Torvalds 5097fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5098fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 50991da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 51001da177e4SLinus Torvalds return 0; 51011da177e4SLinus Torvalds } 51021da177e4SLinus Torvalds 5103ab1d848fSNigel Hislop /* 5104ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5105ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5106ab1d848fSNigel Hislop */ 5107ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5108ab1d848fSNigel Hislop { 5109ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5110ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5111ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5112ab1d848fSNigel Hislop struct ccw1 *ccw; 511352898025SNigel Hislop char psf0, psf1; 5114ab1d848fSNigel Hislop int rc; 5115ab1d848fSNigel Hislop 511652898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 511752898025SNigel Hislop return -EACCES; 511852898025SNigel Hislop psf0 = psf1 = 0; 511952898025SNigel Hislop 5120ab1d848fSNigel Hislop /* Copy parms from caller */ 5121ab1d848fSNigel Hislop rc = -EFAULT; 5122ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5123ab1d848fSNigel Hislop goto out; 512492d62891SHeiko Carstens if (is_compat_task()) { 5125ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5126ab1d848fSNigel Hislop rc = -EINVAL; 5127f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5128ab1d848fSNigel Hislop goto out; 5129f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5130f8b06859SHeiko Carstens goto out; 5131f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5132f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5133ab1d848fSNigel Hislop } 51344a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 51354a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 51364a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 51374a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 51384a8ef699SStefan Haberland usrparm.psf_data_len); 51394a8ef699SStefan Haberland rc = -EINVAL; 51404a8ef699SStefan Haberland goto out; 51414a8ef699SStefan Haberland } 5142ab1d848fSNigel Hislop /* alloc I/O data area */ 5143ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5144ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5145ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5146ab1d848fSNigel Hislop rc = -ENOMEM; 5147ab1d848fSNigel Hislop goto out_free; 5148ab1d848fSNigel Hislop } 5149ab1d848fSNigel Hislop 5150ab1d848fSNigel Hislop /* get syscall header from user space */ 5151ab1d848fSNigel Hislop rc = -EFAULT; 5152ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5153ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5154ab1d848fSNigel Hislop usrparm.psf_data_len)) 5155ab1d848fSNigel Hislop goto out_free; 515652898025SNigel Hislop psf0 = psf_data[0]; 515752898025SNigel Hislop psf1 = psf_data[1]; 5158ab1d848fSNigel Hislop 5159ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5160c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5161ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5162fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5163ab1d848fSNigel Hislop "Could not allocate initialization request"); 5164ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5165ab1d848fSNigel Hislop goto out_free; 5166ab1d848fSNigel Hislop } 5167ab1d848fSNigel Hislop 5168ab1d848fSNigel Hislop cqr->startdev = device; 5169ab1d848fSNigel Hislop cqr->memdev = device; 5170ab1d848fSNigel Hislop cqr->retries = 3; 5171ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 51721aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5173ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5174ab1d848fSNigel Hislop 5175ab1d848fSNigel Hislop /* Build the ccws */ 5176ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5177ab1d848fSNigel Hislop 5178ab1d848fSNigel Hislop /* PSF ccw */ 5179ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5180ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5181ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5182ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 5183ab1d848fSNigel Hislop 5184ab1d848fSNigel Hislop ccw++; 5185ab1d848fSNigel Hislop 5186ab1d848fSNigel Hislop /* RSSD ccw */ 5187ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5188ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5189ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5190ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 5191ab1d848fSNigel Hislop 5192ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5193ab1d848fSNigel Hislop if (rc) 5194ab1d848fSNigel Hislop goto out_sfree; 5195ab1d848fSNigel Hislop 5196ab1d848fSNigel Hislop rc = -EFAULT; 5197ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5198ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5199ab1d848fSNigel Hislop goto out_sfree; 5200ab1d848fSNigel Hislop rc = 0; 5201ab1d848fSNigel Hislop 5202ab1d848fSNigel Hislop out_sfree: 5203ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5204ab1d848fSNigel Hislop out_free: 5205ab1d848fSNigel Hislop kfree(rssd_result); 5206ab1d848fSNigel Hislop kfree(psf_data); 5207ab1d848fSNigel Hislop out: 520852898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 520952898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 521052898025SNigel Hislop (int) psf0, (int) psf1, rc); 5211ab1d848fSNigel Hislop return rc; 5212ab1d848fSNigel Hislop } 5213ab1d848fSNigel Hislop 52141107ccfbSChristoph Hellwig static int 52158e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 52161107ccfbSChristoph Hellwig { 52178e09f215SStefan Weinhuber struct dasd_device *device = block->base; 52188e09f215SStefan Weinhuber 52191107ccfbSChristoph Hellwig switch (cmd) { 52201107ccfbSChristoph Hellwig case BIODASDGATTR: 52211107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 52221107ccfbSChristoph Hellwig case BIODASDSATTR: 52231107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 52241107ccfbSChristoph Hellwig case BIODASDPSRD: 52251107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 52261107ccfbSChristoph Hellwig case BIODASDRLSE: 52271107ccfbSChristoph Hellwig return dasd_eckd_release(device); 52281107ccfbSChristoph Hellwig case BIODASDRSRV: 52291107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 52301107ccfbSChristoph Hellwig case BIODASDSLCK: 52311107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5232196339f1SStefan Weinhuber case BIODASDSNID: 5233196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5234ab1d848fSNigel Hislop case BIODASDSYMMIO: 5235ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 52361107ccfbSChristoph Hellwig default: 52376b79d14eSHeiko Carstens return -ENOTTY; 52381107ccfbSChristoph Hellwig } 52391107ccfbSChristoph Hellwig } 52401107ccfbSChristoph Hellwig 52411da177e4SLinus Torvalds /* 5242445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5243445b5b49SHorst Hummel * and return number of printed chars. 5244445b5b49SHorst Hummel */ 52454d284cacSHeiko Carstens static int 5246445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5247445b5b49SHorst Hummel { 5248445b5b49SHorst Hummel int len, count; 5249445b5b49SHorst Hummel char *datap; 5250445b5b49SHorst Hummel 5251445b5b49SHorst Hummel len = 0; 5252445b5b49SHorst Hummel while (from <= to) { 5253773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5254445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5255445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5256445b5b49SHorst Hummel 5257445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5258445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5259445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 5260445b5b49SHorst Hummel else 5261445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 5262445b5b49SHorst Hummel 5263445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 5264445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 5265445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 5266445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 5267445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5268445b5b49SHorst Hummel } 5269445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5270445b5b49SHorst Hummel from++; 5271445b5b49SHorst Hummel } 5272445b5b49SHorst Hummel return len; 5273445b5b49SHorst Hummel } 5274445b5b49SHorst Hummel 5275fc19f381SStefan Haberland static void 5276aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5277aeec92caSStefan Haberland char *reason) 5278fc19f381SStefan Haberland { 5279fc19f381SStefan Haberland u64 *sense; 5280a5a0061fSStefan Weinhuber u64 *stat; 5281fc19f381SStefan Haberland 5282aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5283a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5284fc19f381SStefan Haberland if (sense) { 5285a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5286a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5287a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5288ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5289fc19f381SStefan Haberland } else { 5290a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5291a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5292a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5293fc19f381SStefan Haberland } 5294fc19f381SStefan Haberland } 5295fc19f381SStefan Haberland 5296445b5b49SHorst Hummel /* 52971da177e4SLinus Torvalds * Print sense data and related channel program. 52981da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 52991da177e4SLinus Torvalds */ 5300f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 53018e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 53021da177e4SLinus Torvalds { 53031da177e4SLinus Torvalds char *page; 5304445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5305445b5b49SHorst Hummel int len, sl, sct; 53061da177e4SLinus Torvalds 53071da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 53081da177e4SLinus Torvalds if (page == NULL) { 5309fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5310fc19f381SStefan Haberland "No memory to dump sense data\n"); 53111da177e4SLinus Torvalds return; 53121da177e4SLinus Torvalds } 5313445b5b49SHorst Hummel /* dump the sense data */ 5314773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 53151da177e4SLinus Torvalds " I/O status report for device %s:\n", 53162a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5317773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5318a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5319a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5320a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5321a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5322a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5323a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5324773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 53251da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 53262a0217d5SKay Sievers dev_name(&device->cdev->dev), 532723d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 53281da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 53291da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5330773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 53311da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 53321da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 53331da177e4SLinus Torvalds 53341da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 53351da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 53361da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 53371da177e4SLinus Torvalds } 53381da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 53391da177e4SLinus Torvalds } 53401da177e4SLinus Torvalds 53411da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 53421da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5343773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53441da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 53451da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 53461da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 53471da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 53481da177e4SLinus Torvalds } else { 53491da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5350773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53511da177e4SLinus Torvalds " 32 Byte: Format: %x " 53521da177e4SLinus Torvalds "Exception class %x\n", 53531da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 53541da177e4SLinus Torvalds } 53551da177e4SLinus Torvalds } else { 5356773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53571da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 53581da177e4SLinus Torvalds } 5359773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 53601da177e4SLinus Torvalds 53618e09f215SStefan Weinhuber if (req) { 53628e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5363445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5364445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5365445b5b49SHorst Hummel first = req->cpaddr; 5366445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5367445b5b49SHorst Hummel to = min(first + 6, last); 5368773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 53691da177e4SLinus Torvalds " Related CP in req: %p\n", req); 5370445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 5371773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 53721da177e4SLinus Torvalds 5373445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5374445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 53751da177e4SLinus Torvalds len = 0; 5376445b5b49SHorst Hummel from = ++to; 537723d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 537823d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5379445b5b49SHorst Hummel if (from < fail - 2) { 5380445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5381773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 53821da177e4SLinus Torvalds } 5383445b5b49SHorst Hummel to = min(fail + 1, last); 5384445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 53851da177e4SLinus Torvalds 5386445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5387445b5b49SHorst Hummel from = max(from, ++to); 5388445b5b49SHorst Hummel if (from < last - 1) { 5389445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5390773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 53911da177e4SLinus Torvalds } 5392445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 53931da177e4SLinus Torvalds if (len > 0) 5394773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 53958e09f215SStefan Weinhuber } 53961da177e4SLinus Torvalds free_page((unsigned long) page); 53971da177e4SLinus Torvalds } 53981da177e4SLinus Torvalds 5399f3eb5384SStefan Weinhuber 5400f3eb5384SStefan Weinhuber /* 5401f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5402f3eb5384SStefan Weinhuber */ 5403f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5404f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5405f3eb5384SStefan Weinhuber { 5406f3eb5384SStefan Weinhuber char *page; 5407f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5408f3eb5384SStefan Weinhuber struct tsb *tsb; 5409ef19298bSStefan Weinhuber u8 *sense, *rcq; 5410f3eb5384SStefan Weinhuber 5411f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5412f3eb5384SStefan Weinhuber if (page == NULL) { 5413fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5414f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5415f3eb5384SStefan Weinhuber return; 5416f3eb5384SStefan Weinhuber } 5417f3eb5384SStefan Weinhuber /* dump the sense data */ 5418773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5419f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5420f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5421773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5422a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5423a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5424a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5425a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5426a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5427a521b048SStefan Haberland irb->scsw.tm.fcxs, 5428a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5429a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5430773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5431f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5432f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5433f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5434f3eb5384SStefan Weinhuber 5435f3eb5384SStefan Weinhuber tsb = NULL; 5436f3eb5384SStefan Weinhuber sense = NULL; 5437a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5438f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5439f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5440f3eb5384SStefan Weinhuber 5441b8fde722SStefan Haberland if (tsb) { 5442773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5443f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5444773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5445f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5446773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5447f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5448773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5449f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5450f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5451773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5452f3eb5384SStefan Weinhuber " residual %d\n", residual); 5453f3eb5384SStefan Weinhuber 5454f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5455f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5456773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5457f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5458f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5459773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5460f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5461f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5462773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5463f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5464f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5465773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5466f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5467f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5468773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5469f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5470f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5471f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5472f3eb5384SStefan Weinhuber break; 5473f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5474773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5475f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5476ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5477773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5478ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5479ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5480ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5481f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5482f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5483ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5484f3eb5384SStefan Weinhuber } 5485f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5486f3eb5384SStefan Weinhuber } 5487f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5488f3eb5384SStefan Weinhuber break; 5489f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5490773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 54918693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5492f3eb5384SStefan Weinhuber break; 5493f3eb5384SStefan Weinhuber } 5494f3eb5384SStefan Weinhuber 5495f3eb5384SStefan Weinhuber if (sense) { 5496f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5497773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5498f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5499f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5500f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5501f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5502f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5503f3eb5384SStefan Weinhuber } 5504f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5505f3eb5384SStefan Weinhuber } 5506f3eb5384SStefan Weinhuber 5507f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5508f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5509773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5510f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5511f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5512f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5513f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5514f3eb5384SStefan Weinhuber } else { 5515f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5516773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5517f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5518f3eb5384SStefan Weinhuber "Exception class %x\n", 5519f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5520f3eb5384SStefan Weinhuber } 5521f3eb5384SStefan Weinhuber } else { 5522773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5523f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5524f3eb5384SStefan Weinhuber } 5525f3eb5384SStefan Weinhuber } else { 5526773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5527f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5528f3eb5384SStefan Weinhuber } 5529773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5530f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5531f3eb5384SStefan Weinhuber } 5532f3eb5384SStefan Weinhuber 5533f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5534f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5535f3eb5384SStefan Weinhuber { 55368fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 55378fd57520SJan Höppner 55388fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 55398fd57520SJan Höppner /* 55408fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 55418fd57520SJan Höppner * error might be expected and log messages shouldn't be written 55428fd57520SJan Höppner * then. Check if the according suppress bit is set. 55438fd57520SJan Höppner */ 55448fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 55458fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 55468fd57520SJan Höppner return; 55478fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 55488fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 55498fd57520SJan Höppner return; 55508fd57520SJan Höppner 5551f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 55528fd57520SJan Höppner } else { 55538fd57520SJan Höppner /* 5554ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5555ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5556ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 55578fd57520SJan Höppner */ 5558ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5559ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5560ab24fbd3SStefan Haberland return; 5561ab24fbd3SStefan Haberland 55628fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 55638fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 55648fd57520SJan Höppner return; 55658fd57520SJan Höppner 5566f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5567f3eb5384SStefan Weinhuber } 55688fd57520SJan Höppner } 5569f3eb5384SStefan Weinhuber 5570501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 5571d41dd122SStefan Haberland { 5572d41dd122SStefan Haberland /* 5573d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 5574d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 5575d41dd122SStefan Haberland * information like PAV support that might have changed 5576d41dd122SStefan Haberland */ 5577d41dd122SStefan Haberland dasd_alias_remove_device(device); 5578d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5579d41dd122SStefan Haberland 5580d41dd122SStefan Haberland return 0; 5581d41dd122SStefan Haberland } 5582d41dd122SStefan Haberland 5583501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 5584d41dd122SStefan Haberland { 5585543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55866fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 5587f9f8d02fSStefan Haberland int rc; 5588d41dd122SStefan Haberland struct dasd_uid temp_uid; 5589a7602f6cSStefan Haberland unsigned long flags; 5590ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 5591d41dd122SStefan Haberland 5592d41dd122SStefan Haberland /* Read Configuration Data */ 5593251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5594251afd69SStefan Haberland if (rc) { 5595251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5596251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5597251afd69SStefan Haberland goto out_err; 5598251afd69SStefan Haberland } 5599d41dd122SStefan Haberland 56002dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 56012dedf0d9SStefan Haberland /* Generate device unique id */ 56022dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 56032dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5604d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 5605a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 5606a7602f6cSStefan Haberland "changed\n"); 56072dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5608d41dd122SStefan Haberland if (rc) 5609d41dd122SStefan Haberland goto out_err; 5610d41dd122SStefan Haberland 5611d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 5612f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 5613f9f8d02fSStefan Haberland if (rc) 5614251afd69SStefan Haberland goto out_err; 5615ea4da6eaSStefan Haberland 5616ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 5617ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 5618f4ac1d02SStefan Weinhuber 5619f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 5620251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5621251afd69SStefan Haberland if (rc) { 5622251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5623251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5624251afd69SStefan Haberland goto out_err2; 5625251afd69SStefan Haberland } 5626d41dd122SStefan Haberland 5627d41dd122SStefan Haberland /* Read Feature Codes */ 562868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 5629d41dd122SStefan Haberland 5630c729696bSJan Höppner /* Read Volume Information */ 5631dd454839SJan Höppner dasd_eckd_read_vol_info(device); 5632c729696bSJan Höppner 5633c729696bSJan Höppner /* Read Extent Pool Information */ 5634dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 5635c729696bSJan Höppner 5636d41dd122SStefan Haberland /* Read Device Characteristics */ 563768b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 56386fca97a9SStefan Haberland &temp_rdc_data, 64); 5639d41dd122SStefan Haberland if (rc) { 5640b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5641b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 5642251afd69SStefan Haberland goto out_err2; 5643d41dd122SStefan Haberland } 5644a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 56456fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5646a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5647d41dd122SStefan Haberland 5648d41dd122SStefan Haberland /* add device to alias management */ 5649d41dd122SStefan Haberland dasd_alias_add_device(device); 5650d41dd122SStefan Haberland 5651d41dd122SStefan Haberland return 0; 5652d41dd122SStefan Haberland 5653251afd69SStefan Haberland out_err2: 5654251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5655d41dd122SStefan Haberland out_err: 5656e6125fbaSStefan Haberland return -1; 5657d41dd122SStefan Haberland } 5658d41dd122SStefan Haberland 5659501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5660501183f2SStefan Haberland { 5661543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5662501183f2SStefan Haberland int rc, old_base; 56632dedf0d9SStefan Haberland char print_uid[60]; 56642dedf0d9SStefan Haberland struct dasd_uid uid; 56652dedf0d9SStefan Haberland unsigned long flags; 5666501183f2SStefan Haberland 566759a9ed5fSStefan Haberland /* 566859a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 566959a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 567059a9ed5fSStefan Haberland */ 567159a9ed5fSStefan Haberland dasd_alias_remove_device(device); 567259a9ed5fSStefan Haberland 56732dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5674501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 56752dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 56762dedf0d9SStefan Haberland 5677501183f2SStefan Haberland /* Read Configuration Data */ 5678501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5679501183f2SStefan Haberland if (rc) 5680501183f2SStefan Haberland goto out_err; 5681501183f2SStefan Haberland 56822dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5683501183f2SStefan Haberland if (rc) 5684501183f2SStefan Haberland goto out_err; 5685501183f2SStefan Haberland /* 5686501183f2SStefan Haberland * update unit address configuration and 5687501183f2SStefan Haberland * add device to alias management 5688501183f2SStefan Haberland */ 5689501183f2SStefan Haberland dasd_alias_update_add_device(device); 5690501183f2SStefan Haberland 56912dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 56922dedf0d9SStefan Haberland 56932dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 56942dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 56952dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 56962dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 56972dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5698501183f2SStefan Haberland else 56992dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 57002dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 57012dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5702501183f2SStefan Haberland 5703501183f2SStefan Haberland dev_info(&device->cdev->dev, 5704501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 57052dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5706501183f2SStefan Haberland } 5707501183f2SStefan Haberland return 0; 5708501183f2SStefan Haberland 5709501183f2SStefan Haberland out_err: 5710501183f2SStefan Haberland return -1; 5711501183f2SStefan Haberland } 5712501183f2SStefan Haberland 57135db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 57145db8440cSStefan Haberland struct dasd_rssd_messages *messages, 57155db8440cSStefan Haberland __u8 lpum) 57165db8440cSStefan Haberland { 57175db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 57185db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 57195db8440cSStefan Haberland struct dasd_ccw_req *cqr; 57205db8440cSStefan Haberland struct ccw1 *ccw; 57215db8440cSStefan Haberland int rc; 57225db8440cSStefan Haberland 57235db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 57245db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 57255db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5726c5205f2fSSebastian Ott device, NULL); 57275db8440cSStefan Haberland if (IS_ERR(cqr)) { 57285db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 57295db8440cSStefan Haberland "Could not allocate read message buffer request"); 57305db8440cSStefan Haberland return PTR_ERR(cqr); 57315db8440cSStefan Haberland } 57325db8440cSStefan Haberland 5733af775210SStefan Haberland cqr->lpm = lpum; 5734af775210SStefan Haberland retry: 57355db8440cSStefan Haberland cqr->startdev = device; 57365db8440cSStefan Haberland cqr->memdev = device; 57375db8440cSStefan Haberland cqr->block = NULL; 57385db8440cSStefan Haberland cqr->expires = 10 * HZ; 57395db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5740b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5741b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5742b179b037SStefan Haberland * do basic erp */ 5743b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5744b179b037SStefan Haberland cqr->retries = 256; 57455db8440cSStefan Haberland 57465db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 57475db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 57485db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 57495db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 57505db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 57515db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 57525db8440cSStefan Haberland 57535db8440cSStefan Haberland ccw = cqr->cpaddr; 57545db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 57555db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 57565db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 57575db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 57585db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 57595db8440cSStefan Haberland 57605db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 57615db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 57625db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 57635db8440cSStefan Haberland 57645db8440cSStefan Haberland ccw++; 57655db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 57665db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 57675db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 57685db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 57695db8440cSStefan Haberland 57705db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 57715db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 57725db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 57735db8440cSStefan Haberland if (rc == 0) { 57745db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 57755db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 57765db8440cSStefan Haberland (prssdp + 1); 57775db8440cSStefan Haberland memcpy(messages, message_buf, 57785db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5779af775210SStefan Haberland } else if (cqr->lpm) { 5780af775210SStefan Haberland /* 5781af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5782af775210SStefan Haberland * but instead we get the required information on any path 5783af775210SStefan Haberland * so retry with open path mask 5784af775210SStefan Haberland */ 5785af775210SStefan Haberland cqr->lpm = 0; 5786af775210SStefan Haberland goto retry; 57875db8440cSStefan Haberland } else 57885db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 57895db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 57905db8440cSStefan Haberland , rc); 57915db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 57925db8440cSStefan Haberland return rc; 57935db8440cSStefan Haberland } 57945db8440cSStefan Haberland 57955a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 57965a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 57975a3b7b11SStefan Haberland { 57985a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 57995a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 58005a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 58015a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 58025a3b7b11SStefan Haberland struct ccw1 *ccw; 58035a3b7b11SStefan Haberland int rc; 58045a3b7b11SStefan Haberland 58055a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 58065a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 58075a3b7b11SStefan Haberland return -EOPNOTSUPP; 58085a3b7b11SStefan Haberland 5809ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5810ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5811ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5812ccd53fa2SStefan Haberland 58135a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 58145a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5815c5205f2fSSebastian Ott device, NULL); 58165a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 58175a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58185a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 58195a3b7b11SStefan Haberland return PTR_ERR(cqr); 58205a3b7b11SStefan Haberland } 58215a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 58225a3b7b11SStefan Haberland if (!host_access) { 58235a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 58245a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58255a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 58265a3b7b11SStefan Haberland return -ENOMEM; 58275a3b7b11SStefan Haberland } 58285a3b7b11SStefan Haberland cqr->startdev = device; 58295a3b7b11SStefan Haberland cqr->memdev = device; 58305a3b7b11SStefan Haberland cqr->block = NULL; 58315a3b7b11SStefan Haberland cqr->retries = 256; 58325a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 58335a3b7b11SStefan Haberland 58345a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 58355a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58365a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 58375a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 58385a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 58395a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 58405a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 58415a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 58425a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 58435a3b7b11SStefan Haberland 58445a3b7b11SStefan Haberland ccw = cqr->cpaddr; 58455a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 58465a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 58475a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 58485a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58495a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 58505a3b7b11SStefan Haberland 58515a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 58525a3b7b11SStefan Haberland ccw++; 58535a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 58545a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 58555a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58565a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 58575a3b7b11SStefan Haberland 58585a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 58595a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5860ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5861ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5862f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 58635a3b7b11SStefan Haberland if (rc == 0) { 58645a3b7b11SStefan Haberland *data = *host_access; 58655a3b7b11SStefan Haberland } else { 58665a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 58675a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 58685a3b7b11SStefan Haberland rc); 58695a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 58705a3b7b11SStefan Haberland } 58715a3b7b11SStefan Haberland 58725a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 58735a3b7b11SStefan Haberland kfree(host_access); 58745a3b7b11SStefan Haberland return rc; 58755a3b7b11SStefan Haberland } 58765a3b7b11SStefan Haberland /* 58775a3b7b11SStefan Haberland * return number of grouped devices 58785a3b7b11SStefan Haberland */ 58795a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 58805a3b7b11SStefan Haberland { 58815a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 58825a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 58835a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 58845a3b7b11SStefan Haberland int count = 0; 58855a3b7b11SStefan Haberland int rc, i; 58865a3b7b11SStefan Haberland 58875a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 58885a3b7b11SStefan Haberland if (!access) { 58895a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58905a3b7b11SStefan Haberland "Could not allocate access buffer"); 58915a3b7b11SStefan Haberland return -ENOMEM; 58925a3b7b11SStefan Haberland } 58935a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 58945a3b7b11SStefan Haberland if (rc) { 58955a3b7b11SStefan Haberland kfree(access); 58965a3b7b11SStefan Haberland return rc; 58975a3b7b11SStefan Haberland } 58985a3b7b11SStefan Haberland 58995a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 59005a3b7b11SStefan Haberland access->host_access_information; 59015a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 59025a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 59035a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 59045a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 59055a3b7b11SStefan Haberland count++; 59065a3b7b11SStefan Haberland } 59075a3b7b11SStefan Haberland 59085a3b7b11SStefan Haberland kfree(access); 59095a3b7b11SStefan Haberland return count; 59105a3b7b11SStefan Haberland } 59115a3b7b11SStefan Haberland 59125a3b7b11SStefan Haberland /* 59135a3b7b11SStefan Haberland * write host access information to a sequential file 59145a3b7b11SStefan Haberland */ 59155a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 59165a3b7b11SStefan Haberland { 59175a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 59185a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 59195a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 59205a3b7b11SStefan Haberland char sysplex[9] = ""; 5921c7848e14SChristophe JAILLET int rc, i; 59225a3b7b11SStefan Haberland 59235a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 59245a3b7b11SStefan Haberland if (!access) { 59255a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59265a3b7b11SStefan Haberland "Could not allocate access buffer"); 59275a3b7b11SStefan Haberland return -ENOMEM; 59285a3b7b11SStefan Haberland } 59295a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 59305a3b7b11SStefan Haberland if (rc) { 59315a3b7b11SStefan Haberland kfree(access); 59325a3b7b11SStefan Haberland return rc; 59335a3b7b11SStefan Haberland } 59345a3b7b11SStefan Haberland 59355a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 59365a3b7b11SStefan Haberland access->host_access_information; 59375a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 59385a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 59395a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 59405a3b7b11SStefan Haberland /* PGID */ 5941c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 59425a3b7b11SStefan Haberland /* FLAGS */ 59435a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 59445a3b7b11SStefan Haberland /* SYSPLEX NAME */ 59455a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 59465a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 59475a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 59485a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 59495a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 59505a3b7b11SStefan Haberland /* TIMESTAMP */ 59515a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 59525a3b7b11SStefan Haberland entry->timestamp); 59535a3b7b11SStefan Haberland } 59545a3b7b11SStefan Haberland kfree(access); 59555a3b7b11SStefan Haberland 59565a3b7b11SStefan Haberland return 0; 59575a3b7b11SStefan Haberland } 59585a3b7b11SStefan Haberland 59595db8440cSStefan Haberland /* 59605db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 59615db8440cSStefan Haberland */ 59625db8440cSStefan Haberland static int 59635db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5964a521b048SStefan Haberland __u32 message_id, __u8 lpum) 59655db8440cSStefan Haberland { 59665db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 5967a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 59685db8440cSStefan Haberland struct dasd_ccw_req *cqr; 59695db8440cSStefan Haberland struct ccw1 *ccw; 59705db8440cSStefan Haberland int rc; 59715db8440cSStefan Haberland 59725db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 59735db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 5974c5205f2fSSebastian Ott device, NULL); 59755db8440cSStefan Haberland 59765db8440cSStefan Haberland if (IS_ERR(cqr)) { 59775db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 59785db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 59795db8440cSStefan Haberland return PTR_ERR(cqr); 59805db8440cSStefan Haberland } 59815db8440cSStefan Haberland 59825db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 59835db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 59845db8440cSStefan Haberland psf_cuir->cc = response; 5985a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 59865db8440cSStefan Haberland psf_cuir->message_id = message_id; 5987a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 5988a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 59895db8440cSStefan Haberland ccw = cqr->cpaddr; 59905db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 59915db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5992b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 59935db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 59945db8440cSStefan Haberland 59955db8440cSStefan Haberland cqr->startdev = device; 59965db8440cSStefan Haberland cqr->memdev = device; 59975db8440cSStefan Haberland cqr->block = NULL; 59985db8440cSStefan Haberland cqr->retries = 256; 59995db8440cSStefan Haberland cqr->expires = 10*HZ; 60005db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 60015db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 6002b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 60035db8440cSStefan Haberland 60045db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 60055db8440cSStefan Haberland 60065db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 60075db8440cSStefan Haberland return rc; 60085db8440cSStefan Haberland } 60095db8440cSStefan Haberland 6010b179b037SStefan Haberland /* 6011b179b037SStefan Haberland * return configuration data that is referenced by record selector 6012b179b037SStefan Haberland * if a record selector is specified or per default return the 6013b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 6014b179b037SStefan Haberland */ 6015b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6016b179b037SStefan Haberland __u8 lpum, 6017b179b037SStefan Haberland struct dasd_cuir_message *cuir) 60185db8440cSStefan Haberland { 6019b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6020b179b037SStefan Haberland int path, pos; 60215db8440cSStefan Haberland 6022b179b037SStefan Haberland if (cuir->record_selector == 0) 6023b179b037SStefan Haberland goto out; 6024b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6025c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 6026b179b037SStefan Haberland if (conf_data->gneq.record_selector == 6027b179b037SStefan Haberland cuir->record_selector) 6028b179b037SStefan Haberland return conf_data; 60295db8440cSStefan Haberland } 6030b179b037SStefan Haberland out: 6031c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 60325db8440cSStefan Haberland } 60335db8440cSStefan Haberland 60345db8440cSStefan Haberland /* 6035b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6036b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6037b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6038b179b037SStefan Haberland * 6039b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6040b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6041b179b037SStefan Haberland * on. 6042b179b037SStefan Haberland */ 6043b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6044b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6045b179b037SStefan Haberland { 6046b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6047b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6048b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6049b179b037SStefan Haberland unsigned int pos, path; 6050b179b037SStefan Haberland char *ref_gneq, *gneq; 6051b179b037SStefan Haberland char *ref_ned, *ned; 6052b179b037SStefan Haberland int tbcpm = 0; 6053b179b037SStefan Haberland 6054b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6055b179b037SStefan Haberland the attention message was presented on */ 6056b179b037SStefan Haberland if (!cuir->ned_map || 6057b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6058b179b037SStefan Haberland return lpum; 6059b179b037SStefan Haberland 6060b179b037SStefan Haberland /* get reference conf data */ 6061b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6062b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6063b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6064b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6065b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6066b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6067b179b037SStefan Haberland mask = cuir->neq_map[2]; 6068b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6069b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6070b179b037SStefan Haberland 6071c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6072b179b037SStefan Haberland /* initialise data per path */ 6073b179b037SStefan Haberland bitmask = mask; 6074c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6075b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6076b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6077b179b037SStefan Haberland /* compare reference ned and per path ned */ 6078b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6079b179b037SStefan Haberland continue; 6080b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6081b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6082b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6083b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6084b179b037SStefan Haberland while (bitmask) { 6085b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6086b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6087b179b037SStefan Haberland != 0) 6088b179b037SStefan Haberland break; 6089b179b037SStefan Haberland clear_bit(pos, &bitmask); 6090b179b037SStefan Haberland } 6091b179b037SStefan Haberland if (bitmask) 6092b179b037SStefan Haberland continue; 6093b179b037SStefan Haberland /* device and path match the reference values 6094b179b037SStefan Haberland add path to CUIR scope */ 6095c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6096b179b037SStefan Haberland } 6097b179b037SStefan Haberland return tbcpm; 6098b179b037SStefan Haberland } 6099b179b037SStefan Haberland 6100b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6101a521b048SStefan Haberland unsigned long paths, int action) 6102b179b037SStefan Haberland { 6103b179b037SStefan Haberland int pos; 6104b179b037SStefan Haberland 6105b179b037SStefan Haberland while (paths) { 6106b179b037SStefan Haberland /* get position of bit in mask */ 6107a521b048SStefan Haberland pos = 8 - ffs(paths); 6108b179b037SStefan Haberland /* get channel path descriptor from this position */ 6109b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6110a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6111a521b048SStefan Haberland device->path[pos].cssid, 6112a521b048SStefan Haberland device->path[pos].chpid); 6113b179b037SStefan Haberland else if (action == CUIR_RESUME) 6114a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6115a521b048SStefan Haberland device->path[pos].cssid, 6116a521b048SStefan Haberland device->path[pos].chpid); 6117a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6118b179b037SStefan Haberland } 6119b179b037SStefan Haberland } 6120b179b037SStefan Haberland 6121b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6122b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6123b179b037SStefan Haberland { 6124b179b037SStefan Haberland unsigned long tbcpm; 6125b179b037SStefan Haberland 6126b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6127b179b037SStefan Haberland /* nothing to do if path is not in use */ 6128c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6129b179b037SStefan Haberland return 0; 6130c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6131b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6132b179b037SStefan Haberland return error */ 6133b179b037SStefan Haberland return -EINVAL; 6134b179b037SStefan Haberland } 6135b179b037SStefan Haberland /* remove device from operational path mask */ 6136c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6137c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6138b179b037SStefan Haberland return tbcpm; 6139b179b037SStefan Haberland } 6140b179b037SStefan Haberland 6141b179b037SStefan Haberland /* 6142b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6143b179b037SStefan Haberland * return an error if the last path to a device would be removed 61445db8440cSStefan Haberland * 61455db8440cSStefan Haberland * if only part of the devices are quiesced and an error 61465db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 61475db8440cSStefan Haberland * notify the already set offline devices again 61485db8440cSStefan Haberland */ 61495db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6150b179b037SStefan Haberland struct dasd_cuir_message *cuir) 61515db8440cSStefan Haberland { 6152543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 61535db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 61545db8440cSStefan Haberland struct dasd_device *dev, *n; 6155b179b037SStefan Haberland unsigned long paths = 0; 6156b179b037SStefan Haberland unsigned long flags; 6157b179b037SStefan Haberland int tbcpm; 61585db8440cSStefan Haberland 61595db8440cSStefan Haberland /* active devices */ 6160b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 61615db8440cSStefan Haberland alias_list) { 6162b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6163b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6164b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6165b179b037SStefan Haberland if (tbcpm < 0) 6166b179b037SStefan Haberland goto out_err; 6167b179b037SStefan Haberland paths |= tbcpm; 61685db8440cSStefan Haberland } 61695db8440cSStefan Haberland /* inactive devices */ 6170b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 61715db8440cSStefan Haberland alias_list) { 6172b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6173b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6174b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6175b179b037SStefan Haberland if (tbcpm < 0) 6176b179b037SStefan Haberland goto out_err; 6177b179b037SStefan Haberland paths |= tbcpm; 61785db8440cSStefan Haberland } 61795db8440cSStefan Haberland /* devices in PAV groups */ 61805db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 61815db8440cSStefan Haberland &private->lcu->grouplist, group) { 61825db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 61835db8440cSStefan Haberland alias_list) { 6184b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6185b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6186b179b037SStefan Haberland spin_unlock_irqrestore( 6187b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6188b179b037SStefan Haberland if (tbcpm < 0) 6189b179b037SStefan Haberland goto out_err; 6190b179b037SStefan Haberland paths |= tbcpm; 61915db8440cSStefan Haberland } 61925db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 61935db8440cSStefan Haberland alias_list) { 6194b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6195b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6196b179b037SStefan Haberland spin_unlock_irqrestore( 6197b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6198b179b037SStefan Haberland if (tbcpm < 0) 6199b179b037SStefan Haberland goto out_err; 6200b179b037SStefan Haberland paths |= tbcpm; 62015db8440cSStefan Haberland } 62025db8440cSStefan Haberland } 6203b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6204a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6205b179b037SStefan Haberland return 0; 6206b179b037SStefan Haberland out_err: 6207b179b037SStefan Haberland return tbcpm; 62085db8440cSStefan Haberland } 62095db8440cSStefan Haberland 62105db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6211b179b037SStefan Haberland struct dasd_cuir_message *cuir) 62125db8440cSStefan Haberland { 6213543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 62145db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 62155db8440cSStefan Haberland struct dasd_device *dev, *n; 6216b179b037SStefan Haberland unsigned long paths = 0; 6217b179b037SStefan Haberland int tbcpm; 62185db8440cSStefan Haberland 62195db8440cSStefan Haberland /* 62205db8440cSStefan Haberland * the path may have been added through a generic path event before 62215db8440cSStefan Haberland * only trigger path verification if the path is not already in use 62225db8440cSStefan Haberland */ 62235db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62245db8440cSStefan Haberland &private->lcu->active_devices, 62255db8440cSStefan Haberland alias_list) { 6226b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6227b179b037SStefan Haberland paths |= tbcpm; 6228c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6229c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62305db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62315db8440cSStefan Haberland } 62325db8440cSStefan Haberland } 62335db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62345db8440cSStefan Haberland &private->lcu->inactive_devices, 62355db8440cSStefan Haberland alias_list) { 6236b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6237b179b037SStefan Haberland paths |= tbcpm; 6238c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6239c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62405db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62415db8440cSStefan Haberland } 62425db8440cSStefan Haberland } 62435db8440cSStefan Haberland /* devices in PAV groups */ 62445db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 62455db8440cSStefan Haberland &private->lcu->grouplist, 62465db8440cSStefan Haberland group) { 62475db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62485db8440cSStefan Haberland &pavgroup->baselist, 62495db8440cSStefan Haberland alias_list) { 6250b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6251b179b037SStefan Haberland paths |= tbcpm; 6252c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6253c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62545db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62555db8440cSStefan Haberland } 62565db8440cSStefan Haberland } 62575db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62585db8440cSStefan Haberland &pavgroup->aliaslist, 62595db8440cSStefan Haberland alias_list) { 6260b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6261b179b037SStefan Haberland paths |= tbcpm; 6262c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6263c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62645db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62655db8440cSStefan Haberland } 62665db8440cSStefan Haberland } 62675db8440cSStefan Haberland } 6268b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6269a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6270b179b037SStefan Haberland return 0; 62715db8440cSStefan Haberland } 62725db8440cSStefan Haberland 62735db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 62745db8440cSStefan Haberland __u8 lpum) 62755db8440cSStefan Haberland { 62765db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6277a521b048SStefan Haberland int response; 62785db8440cSStefan Haberland 6279b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6280b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6281b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6282b179b037SStefan Haberland ((u32 *)cuir)[3]); 62835db8440cSStefan Haberland 62845db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 62855db8440cSStefan Haberland /* quiesce */ 6286a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6287b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6288b179b037SStefan Haberland else 6289b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 62905db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 62915db8440cSStefan Haberland /* resume */ 6292a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6293b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 62945db8440cSStefan Haberland } else 62955db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 62965db8440cSStefan Haberland 6297b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6298a521b048SStefan Haberland cuir->message_id, lpum); 6299b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6300b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6301b179b037SStefan Haberland cuir->message_id); 6302b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6303b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 63045db8440cSStefan Haberland } 63055db8440cSStefan Haberland 63069e12e54cSJan Höppner static void dasd_eckd_oos_resume(struct dasd_device *device) 63079e12e54cSJan Höppner { 63089e12e54cSJan Höppner struct dasd_eckd_private *private = device->private; 63099e12e54cSJan Höppner struct alias_pav_group *pavgroup, *tempgroup; 63109e12e54cSJan Höppner struct dasd_device *dev, *n; 63119e12e54cSJan Höppner unsigned long flags; 63129e12e54cSJan Höppner 63139e12e54cSJan Höppner spin_lock_irqsave(&private->lcu->lock, flags); 63149e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 63159e12e54cSJan Höppner alias_list) { 63169e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 63179e12e54cSJan Höppner dasd_generic_space_avail(dev); 63189e12e54cSJan Höppner } 63199e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 63209e12e54cSJan Höppner alias_list) { 63219e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 63229e12e54cSJan Höppner dasd_generic_space_avail(dev); 63239e12e54cSJan Höppner } 63249e12e54cSJan Höppner /* devices in PAV groups */ 63259e12e54cSJan Höppner list_for_each_entry_safe(pavgroup, tempgroup, 63269e12e54cSJan Höppner &private->lcu->grouplist, 63279e12e54cSJan Höppner group) { 63289e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->baselist, 63299e12e54cSJan Höppner alias_list) { 63309e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 63319e12e54cSJan Höppner dasd_generic_space_avail(dev); 63329e12e54cSJan Höppner } 63339e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 63349e12e54cSJan Höppner alias_list) { 63359e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 63369e12e54cSJan Höppner dasd_generic_space_avail(dev); 63379e12e54cSJan Höppner } 63389e12e54cSJan Höppner } 63399e12e54cSJan Höppner spin_unlock_irqrestore(&private->lcu->lock, flags); 63409e12e54cSJan Höppner } 63419e12e54cSJan Höppner 63429e12e54cSJan Höppner static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 63439e12e54cSJan Höppner __u8 lpum) 63449e12e54cSJan Höppner { 63459e12e54cSJan Höppner struct dasd_oos_message *oos = messages; 63469e12e54cSJan Höppner 63479e12e54cSJan Höppner switch (oos->code) { 63489e12e54cSJan Höppner case REPO_WARN: 63499e12e54cSJan Höppner case POOL_WARN: 63509e12e54cSJan Höppner dev_warn(&device->cdev->dev, 63519e12e54cSJan Höppner "Extent pool usage has reached a critical value\n"); 63529e12e54cSJan Höppner dasd_eckd_oos_resume(device); 63539e12e54cSJan Höppner break; 63549e12e54cSJan Höppner case REPO_EXHAUST: 63559e12e54cSJan Höppner case POOL_EXHAUST: 63569e12e54cSJan Höppner dev_warn(&device->cdev->dev, 63579e12e54cSJan Höppner "Extent pool is exhausted\n"); 63589e12e54cSJan Höppner break; 63599e12e54cSJan Höppner case REPO_RELIEVE: 63609e12e54cSJan Höppner case POOL_RELIEVE: 63619e12e54cSJan Höppner dev_info(&device->cdev->dev, 63629e12e54cSJan Höppner "Extent pool physical space constraint has been relieved\n"); 63639e12e54cSJan Höppner break; 63649e12e54cSJan Höppner } 63659e12e54cSJan Höppner 63669e12e54cSJan Höppner /* In any case, update related data */ 63679e12e54cSJan Höppner dasd_eckd_read_ext_pool_info(device); 63689e12e54cSJan Höppner 63699e12e54cSJan Höppner /* to make sure there is no attention left schedule work again */ 63709e12e54cSJan Höppner device->discipline->check_attention(device, lpum); 63719e12e54cSJan Höppner } 63729e12e54cSJan Höppner 63735db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 63745db8440cSStefan Haberland { 63755db8440cSStefan Haberland struct check_attention_work_data *data; 63765db8440cSStefan Haberland struct dasd_rssd_messages *messages; 63775db8440cSStefan Haberland struct dasd_device *device; 63785db8440cSStefan Haberland int rc; 63795db8440cSStefan Haberland 63805db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 63815db8440cSStefan Haberland device = data->device; 63825db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 63835db8440cSStefan Haberland if (!messages) { 63845db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 63855db8440cSStefan Haberland "Could not allocate attention message buffer"); 63865db8440cSStefan Haberland goto out; 63875db8440cSStefan Haberland } 63885db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 63895db8440cSStefan Haberland if (rc) 63905db8440cSStefan Haberland goto out; 63919e12e54cSJan Höppner 63925db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 63935db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 63945db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 63959e12e54cSJan Höppner if (messages->length == ATTENTION_LENGTH_OOS && 63969e12e54cSJan Höppner messages->format == ATTENTION_FORMAT_OOS) 63979e12e54cSJan Höppner dasd_eckd_handle_oos(device, messages, data->lpum); 63989e12e54cSJan Höppner 63995db8440cSStefan Haberland out: 64005db8440cSStefan Haberland dasd_put_device(device); 64015db8440cSStefan Haberland kfree(messages); 64025db8440cSStefan Haberland kfree(data); 64035db8440cSStefan Haberland } 64045db8440cSStefan Haberland 64055db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 64065db8440cSStefan Haberland { 64075db8440cSStefan Haberland struct check_attention_work_data *data; 64085db8440cSStefan Haberland 64095db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 64105db8440cSStefan Haberland if (!data) 64115db8440cSStefan Haberland return -ENOMEM; 64125db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 64135db8440cSStefan Haberland dasd_get_device(device); 64145db8440cSStefan Haberland data->device = device; 64155db8440cSStefan Haberland data->lpum = lpum; 64165db8440cSStefan Haberland schedule_work(&data->worker); 64175db8440cSStefan Haberland return 0; 64185db8440cSStefan Haberland } 64195db8440cSStefan Haberland 6420a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6421a521b048SStefan Haberland { 6422a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6423a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6424a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6425a521b048SStefan Haberland dev_err(&device->cdev->dev, 6426a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6427a521b048SStefan Haberland lpum); 6428a521b048SStefan Haberland return 1; 6429a521b048SStefan Haberland } 6430a521b048SStefan Haberland return 0; 6431a521b048SStefan Haberland } 6432a521b048SStefan Haberland 6433a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6434a521b048SStefan Haberland { 6435a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6436a521b048SStefan Haberland 6437a521b048SStefan Haberland dev_err(&device->cdev->dev, 6438a521b048SStefan Haberland "High Performance FICON disabled\n"); 6439a521b048SStefan Haberland private->fcx_max_data = 0; 6440a521b048SStefan Haberland } 6441a521b048SStefan Haberland 6442a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6443a521b048SStefan Haberland { 6444a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6445a521b048SStefan Haberland 6446a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6447a521b048SStefan Haberland } 6448a521b048SStefan Haberland 6449a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6450a521b048SStefan Haberland struct irb *irb) 6451a521b048SStefan Haberland { 6452a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6453a521b048SStefan Haberland 6454a521b048SStefan Haberland if (!private->fcx_max_data) { 6455a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6456a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6457a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6458a521b048SStefan Haberland return; 6459a521b048SStefan Haberland } 6460a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6461a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6462a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6463a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6464a521b048SStefan Haberland return; 6465a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6466a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6467a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6468a521b048SStefan Haberland } 6469a521b048SStefan Haberland /* 6470a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6471a521b048SStefan Haberland * requeue of existing requests 6472a521b048SStefan Haberland */ 6473a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6474a521b048SStefan Haberland dasd_schedule_requeue(device); 6475a521b048SStefan Haberland } 6476a521b048SStefan Haberland 6477a0610a8aSJan Höppner /* 6478a0610a8aSJan Höppner * Initialize block layer request queue. 6479a0610a8aSJan Höppner */ 6480a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6481a0610a8aSJan Höppner { 6482a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6483a0610a8aSJan Höppner struct request_queue *q = block->request_queue; 6484a0610a8aSJan Höppner struct dasd_device *device = block->base; 6485a0610a8aSJan Höppner int max; 6486a0610a8aSJan Höppner 6487a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6488a0610a8aSJan Höppner /* 6489a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6490a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6491a0610a8aSJan Höppner * only need one ccw per track 6492a0610a8aSJan Höppner * so the max_hw_sectors are 6493a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6494a0610a8aSJan Höppner */ 6495a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6496a0610a8aSJan Höppner } else { 6497a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6498a0610a8aSJan Höppner } 6499a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6500a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6501a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6502a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6503a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6504a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6505a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6506a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 6507a0610a8aSJan Höppner } 6508a0610a8aSJan Höppner 6509d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 65103bda058bSSebastian Ott .driver = { 6511d41dd122SStefan Haberland .name = "dasd-eckd", 6512d41dd122SStefan Haberland .owner = THIS_MODULE, 65133bda058bSSebastian Ott }, 6514d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6515d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6516d41dd122SStefan Haberland .remove = dasd_generic_remove, 6517d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6518d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6519d41dd122SStefan Haberland .notify = dasd_generic_notify, 6520a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 65214679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6522d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 6523d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 6524d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 6525a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6526420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6527d41dd122SStefan Haberland }; 6528f3eb5384SStefan Weinhuber 65291da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 65301da177e4SLinus Torvalds .owner = THIS_MODULE, 65311da177e4SLinus Torvalds .name = "ECKD", 65321da177e4SLinus Torvalds .ebcname = "ECKD", 65331da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 65348e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 65351da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6536a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 6537d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 65388e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6539daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6540a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 65411da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 65421da177e4SLinus Torvalds .start_IO = dasd_start_IO, 65431da177e4SLinus Torvalds .term_IO = dasd_term_IO, 65448e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 65451da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 65468fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 65471da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 65481da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 65495a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 65508e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 65518e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 65521da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6553fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 65541da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 65551107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6556d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 6557d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 6558501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 65592dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6560f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 65615db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 65625a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 65635a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6564a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6565a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6566a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6567a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6568c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6569c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6570c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6571c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 657291dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6573c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6574c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6575c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6576c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6577c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 65789e12e54cSJan Höppner .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 65795e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 65805e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 65811da177e4SLinus Torvalds }; 65821da177e4SLinus Torvalds 65831da177e4SLinus Torvalds static int __init 65841da177e4SLinus Torvalds dasd_eckd_init(void) 65851da177e4SLinus Torvalds { 6586736e6ea0SSebastian Ott int ret; 6587736e6ea0SSebastian Ott 65881da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6589f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6590f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6591f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6592f932bceaSStefan Weinhuber return -ENOMEM; 65939e12e54cSJan Höppner dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 65949e12e54cSJan Höppner GFP_KERNEL | GFP_DMA); 65959e12e54cSJan Höppner if (!dasd_vol_info_req) 65969e12e54cSJan Höppner return -ENOMEM; 6597a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 6598a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6599a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 6600a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 66019e12e54cSJan Höppner kfree(dasd_vol_info_req); 6602a4d26c6aSStefan Weinhuber return -ENOMEM; 6603a4d26c6aSStefan Weinhuber } 6604558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6605558b9ef0SStefan Weinhuber if (!rawpadpage) { 6606558b9ef0SStefan Weinhuber kfree(path_verification_worker); 6607558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 66089e12e54cSJan Höppner kfree(dasd_vol_info_req); 6609558b9ef0SStefan Weinhuber return -ENOMEM; 6610558b9ef0SStefan Weinhuber } 6611736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6612736e6ea0SSebastian Ott if (!ret) 6613736e6ea0SSebastian Ott wait_for_device_probe(); 6614a4d26c6aSStefan Weinhuber else { 6615a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6616f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 66179e12e54cSJan Höppner kfree(dasd_vol_info_req); 6618558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6619a4d26c6aSStefan Weinhuber } 6620736e6ea0SSebastian Ott return ret; 66211da177e4SLinus Torvalds } 66221da177e4SLinus Torvalds 66231da177e4SLinus Torvalds static void __exit 66241da177e4SLinus Torvalds dasd_eckd_cleanup(void) 66251da177e4SLinus Torvalds { 66261da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6627a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6628f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6629558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 66301da177e4SLinus Torvalds } 66311da177e4SLinus Torvalds 66321da177e4SLinus Torvalds module_init(dasd_eckd_init); 66331da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6634