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; 1131a521b048SStefan Haberland int tpm, mdc; 1132a521b048SStefan Haberland 1133a521b048SStefan Haberland if (dasd_nofcx) 1134a521b048SStefan Haberland return 0; 1135a521b048SStefan Haberland /* is transport mode supported? */ 1136a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1137a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1138a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1139a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1140a521b048SStefan Haberland 1141a521b048SStefan Haberland if (!tpm) 1142a521b048SStefan Haberland return 0; 1143a521b048SStefan Haberland 1144a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1145a521b048SStefan Haberland if (mdc < 0) { 1146a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1147a521b048SStefan Haberland return 0; 1148a521b048SStefan Haberland } else { 1149a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1150a521b048SStefan Haberland } 1151a521b048SStefan Haberland } 1152a521b048SStefan Haberland 1153a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1154a4d26c6aSStefan Weinhuber { 1155543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1156a4d26c6aSStefan Weinhuber int mdc; 1157a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1158a4d26c6aSStefan Weinhuber 1159a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1160a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1161a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1162a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1163a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1164a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1165a4d26c6aSStefan Weinhuber mdc, lpm); 1166a4d26c6aSStefan Weinhuber return mdc; 1167a4d26c6aSStefan Weinhuber } 11680f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1169a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1170a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1171a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1172a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1173a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1174a4d26c6aSStefan Weinhuber private->fcx_max_data); 1175a4d26c6aSStefan Weinhuber return -EACCES; 1176a4d26c6aSStefan Weinhuber } 1177a4d26c6aSStefan Weinhuber } 1178a4d26c6aSStefan Weinhuber return 0; 1179a4d26c6aSStefan Weinhuber } 1180a4d26c6aSStefan Weinhuber 1181b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1182b206181dSStefan Haberland struct path_verification_work_data *data) 1183b206181dSStefan Haberland { 1184543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1185c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1186543691a4SSebastian Ott int rc = -ENODEV; 1187b206181dSStefan Haberland 1188b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1189b206181dSStefan Haberland if (!(lpm & opm)) 1190b206181dSStefan Haberland continue; 1191b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1192b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1193b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1194b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1195b206181dSStefan Haberland data->rcd_buffer, 1196b206181dSStefan Haberland lpm); 1197b206181dSStefan Haberland 1198b206181dSStefan Haberland if (rc) { 1199b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1200b206181dSStefan Haberland continue; 1201b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1202b206181dSStefan Haberland "Read configuration data " 1203b206181dSStefan Haberland "returned error %d", rc); 1204b206181dSStefan Haberland break; 1205b206181dSStefan Haberland } 1206b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1207b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1208b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1209b206181dSStefan Haberland rc = -ENODEV; 1210b206181dSStefan Haberland } else /* first valid path is enough */ 1211b206181dSStefan Haberland break; 1212b206181dSStefan Haberland } 1213b206181dSStefan Haberland 1214b206181dSStefan Haberland if (!rc) 1215b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1216b206181dSStefan Haberland 1217b206181dSStefan Haberland return rc; 1218b206181dSStefan Haberland } 1219b206181dSStefan Haberland 1220a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1221a4d26c6aSStefan Weinhuber { 1222a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1223a4d26c6aSStefan Weinhuber struct dasd_device *device; 1224b206181dSStefan Haberland struct dasd_eckd_private path_private; 1225b206181dSStefan Haberland struct dasd_uid *uid; 1226b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12275db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1228a4d26c6aSStefan Weinhuber unsigned long flags; 1229b206181dSStefan Haberland char print_uid[60]; 1230a4d26c6aSStefan Weinhuber int rc; 1231a4d26c6aSStefan Weinhuber 1232a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1233a4d26c6aSStefan Weinhuber device = data->device; 1234a4d26c6aSStefan Weinhuber 1235c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1236c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1237c8d1c0ffSStefan Haberland schedule_work(work); 1238c8d1c0ffSStefan Haberland return; 1239c8d1c0ffSStefan Haberland } 12401eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12411eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12421eb38023SStefan Haberland schedule_work(work); 12431eb38023SStefan Haberland return; 12441eb38023SStefan Haberland } 1245a4d26c6aSStefan Weinhuber opm = 0; 1246a4d26c6aSStefan Weinhuber npm = 0; 1247a4d26c6aSStefan Weinhuber ppm = 0; 1248a4d26c6aSStefan Weinhuber epm = 0; 12495db8440cSStefan Haberland hpfpm = 0; 12505db8440cSStefan Haberland cablepm = 0; 12515db8440cSStefan Haberland 1252a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1253b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1254b206181dSStefan Haberland continue; 1255b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1256a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1257a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1258a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1259a4d26c6aSStefan Weinhuber data->rcd_buffer, 1260a4d26c6aSStefan Weinhuber lpm); 1261a4d26c6aSStefan Weinhuber if (!rc) { 1262a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1263b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1264b206181dSStefan Haberland ) { 1265a4d26c6aSStefan Weinhuber case 0x02: 1266a4d26c6aSStefan Weinhuber npm |= lpm; 1267a4d26c6aSStefan Weinhuber break; 1268a4d26c6aSStefan Weinhuber case 0x03: 1269a4d26c6aSStefan Weinhuber ppm |= lpm; 1270a4d26c6aSStefan Weinhuber break; 1271a4d26c6aSStefan Weinhuber } 1272a4d26c6aSStefan Weinhuber opm |= lpm; 1273a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1274a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1275a4d26c6aSStefan Weinhuber "path verification: No configuration " 1276a4d26c6aSStefan Weinhuber "data retrieved"); 1277a4d26c6aSStefan Weinhuber opm |= lpm; 1278a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1279a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1280a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1281a4d26c6aSStefan Weinhuber " try again later"); 1282a4d26c6aSStefan Weinhuber epm |= lpm; 1283a4d26c6aSStefan Weinhuber } else { 1284a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1285a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1286a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1287a4d26c6aSStefan Weinhuber continue; 1288a4d26c6aSStefan Weinhuber } 1289a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1290a4d26c6aSStefan Weinhuber opm &= ~lpm; 1291a4d26c6aSStefan Weinhuber npm &= ~lpm; 1292a4d26c6aSStefan Weinhuber ppm &= ~lpm; 12935db8440cSStefan Haberland hpfpm |= lpm; 1294b206181dSStefan Haberland continue; 1295b206181dSStefan Haberland } 1296b206181dSStefan Haberland 1297b206181dSStefan Haberland /* 1298b206181dSStefan Haberland * save conf_data for comparison after 1299b206181dSStefan Haberland * rebuild_device_uid may have changed 1300b206181dSStefan Haberland * the original data 1301b206181dSStefan Haberland */ 1302b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1303b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1304b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1305b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1306b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1307b206181dSStefan Haberland path_private.conf_data = NULL; 1308b206181dSStefan Haberland path_private.conf_len = 0; 1309b206181dSStefan Haberland continue; 1310b206181dSStefan Haberland } 1311b206181dSStefan Haberland 1312b206181dSStefan Haberland /* 1313b206181dSStefan Haberland * compare path UID with device UID only if at least 1314b206181dSStefan Haberland * one valid path is left 1315b206181dSStefan Haberland * in other case the device UID may have changed and 1316b206181dSStefan Haberland * the first working path UID will be used as device UID 1317b206181dSStefan Haberland */ 1318c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1319b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1320b206181dSStefan Haberland /* 1321b206181dSStefan Haberland * the comparison was not successful 1322b206181dSStefan Haberland * rebuild the device UID with at least one 1323b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1324b206181dSStefan Haberland * has changed the device 1325b206181dSStefan Haberland * 1326b206181dSStefan Haberland * after this compare again 1327b206181dSStefan Haberland * 1328b206181dSStefan Haberland * if either the rebuild or the recompare fails 1329b206181dSStefan Haberland * the path can not be used 1330b206181dSStefan Haberland */ 1331b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1332b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1333b206181dSStefan Haberland device, &path_private)) { 1334b206181dSStefan Haberland uid = &path_private.uid; 1335b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1336b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1337b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1338b206181dSStefan Haberland uid->vendor, uid->serial, 1339b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1340b206181dSStefan Haberland uid->vduit); 1341b206181dSStefan Haberland else 1342b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1343b206181dSStefan Haberland "%s.%s.%04x.%02x", 1344b206181dSStefan Haberland uid->vendor, uid->serial, 1345b206181dSStefan Haberland uid->ssid, 1346b206181dSStefan Haberland uid->real_unit_addr); 1347b206181dSStefan Haberland dev_err(&device->cdev->dev, 1348b206181dSStefan Haberland "The newly added channel path %02X " 1349b206181dSStefan Haberland "will not be used because it leads " 1350b206181dSStefan Haberland "to a different device %s\n", 1351b206181dSStefan Haberland lpm, print_uid); 1352b206181dSStefan Haberland opm &= ~lpm; 1353b206181dSStefan Haberland npm &= ~lpm; 1354b206181dSStefan Haberland ppm &= ~lpm; 13555db8440cSStefan Haberland cablepm |= lpm; 1356b206181dSStefan Haberland continue; 1357a4d26c6aSStefan Weinhuber } 1358a4d26c6aSStefan Weinhuber } 1359b206181dSStefan Haberland 1360a4d26c6aSStefan Weinhuber /* 1361a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1362a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1363a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1364a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1365a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1366a4d26c6aSStefan Weinhuber */ 1367a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1368c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1369c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1370a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 13715db8440cSStefan Haberland } else { 1372c9346151SStefan Haberland dasd_path_add_opm(device, opm); 13735db8440cSStefan Haberland } 1374c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1375c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1376c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1377c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1378c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1379a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1380b206181dSStefan Haberland } 13811eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1382a4d26c6aSStefan Weinhuber dasd_put_device(device); 1383a4d26c6aSStefan Weinhuber if (data->isglobal) 1384a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1385a4d26c6aSStefan Weinhuber else 1386a4d26c6aSStefan Weinhuber kfree(data); 1387a4d26c6aSStefan Weinhuber } 1388a4d26c6aSStefan Weinhuber 1389a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1390a4d26c6aSStefan Weinhuber { 1391a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1392a4d26c6aSStefan Weinhuber 1393a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1394a4d26c6aSStefan Weinhuber if (!data) { 1395a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1396a4d26c6aSStefan Weinhuber data = path_verification_worker; 1397a4d26c6aSStefan Weinhuber data->isglobal = 1; 1398a4d26c6aSStefan Weinhuber } else 1399a4d26c6aSStefan Weinhuber return -ENOMEM; 1400a4d26c6aSStefan Weinhuber } else { 1401a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1402a4d26c6aSStefan Weinhuber data->isglobal = 0; 1403a4d26c6aSStefan Weinhuber } 1404a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1405a4d26c6aSStefan Weinhuber dasd_get_device(device); 1406a4d26c6aSStefan Weinhuber data->device = device; 1407a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1408a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1409a4d26c6aSStefan Weinhuber return 0; 1410a4d26c6aSStefan Weinhuber } 1411a4d26c6aSStefan Weinhuber 1412a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1413a521b048SStefan Haberland { 1414a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1415a521b048SStefan Haberland unsigned long flags; 1416a521b048SStefan Haberland 1417a521b048SStefan Haberland if (!private->fcx_max_data) 1418a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1419a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1420a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1421a521b048SStefan Haberland dasd_schedule_device_bh(device); 1422a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1423a521b048SStefan Haberland } 1424a521b048SStefan Haberland 14258e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14268e09f215SStefan Weinhuber { 1427543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14288e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14298e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14308e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14318e09f215SStefan Weinhuber struct ccw1 *ccw; 14328e09f215SStefan Weinhuber int rc; 14338e09f215SStefan Weinhuber 143468d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 143568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14368e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14378e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1438c5205f2fSSebastian Ott device, NULL); 14398e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1440b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1441b8ed5dd5SStefan Haberland "allocate initialization request"); 14428e09f215SStefan Weinhuber return PTR_ERR(cqr); 14438e09f215SStefan Weinhuber } 14448e09f215SStefan Weinhuber cqr->startdev = device; 14458e09f215SStefan Weinhuber cqr->memdev = device; 14468e09f215SStefan Weinhuber cqr->block = NULL; 1447eb6e199bSStefan Weinhuber cqr->retries = 256; 14488e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14498e09f215SStefan Weinhuber 14508e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14518e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14528e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14538e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14548e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14558e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14568e09f215SStefan Weinhuber 14578e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14588e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14598e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14608e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14618e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14628e09f215SStefan Weinhuber 14638e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14648e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14658e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14668e09f215SStefan Weinhuber 14678e09f215SStefan Weinhuber ccw++; 14688e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14698e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14708e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14718e09f215SStefan Weinhuber 14721aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14738e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14748e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14758e09f215SStefan Weinhuber if (rc == 0) { 14768e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14778e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14788e09f215SStefan Weinhuber memcpy(&private->features, features, 14798e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 148068d1e5f0SStefan Weinhuber } else 148168d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 148268d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14838e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14848e09f215SStefan Weinhuber return rc; 14858e09f215SStefan Weinhuber } 14868e09f215SStefan Weinhuber 1487c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1488c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1489c729696bSJan Höppner { 1490c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1491c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1492c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1493c729696bSJan Höppner struct dasd_ccw_req *cqr; 1494c729696bSJan Höppner struct ccw1 *ccw; 14959e12e54cSJan Höppner int useglobal; 1496c729696bSJan Höppner int rc; 1497c729696bSJan Höppner 1498c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1499c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1500c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1501c729696bSJan Höppner return 0; 1502c729696bSJan Höppner 15039e12e54cSJan Höppner useglobal = 0; 1504c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1505c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1506c729696bSJan Höppner if (IS_ERR(cqr)) { 1507c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1508c729696bSJan Höppner "Could not allocate initialization request"); 15099e12e54cSJan Höppner mutex_lock(&dasd_vol_info_mutex); 15109e12e54cSJan Höppner useglobal = 1; 15119e12e54cSJan Höppner cqr = &dasd_vol_info_req->cqr; 15129e12e54cSJan Höppner memset(cqr, 0, sizeof(*cqr)); 15139e12e54cSJan Höppner memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); 15149e12e54cSJan Höppner cqr->cpaddr = &dasd_vol_info_req->ccw; 15159e12e54cSJan Höppner cqr->data = &dasd_vol_info_req->data; 15169e12e54cSJan Höppner cqr->magic = DASD_ECKD_MAGIC; 1517c729696bSJan Höppner } 1518c729696bSJan Höppner 1519c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1520c729696bSJan Höppner prssdp = cqr->data; 1521c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1522c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1523c729696bSJan Höppner prssdp->lss = private->ned->ID; 1524c729696bSJan Höppner prssdp->volume = private->ned->unit_addr; 1525c729696bSJan Höppner 1526c729696bSJan Höppner ccw = cqr->cpaddr; 1527c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1528c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1529c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1530c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1531c729696bSJan Höppner 1532c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1533c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1534c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1535c729696bSJan Höppner 1536c729696bSJan Höppner ccw++; 1537c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1538c729696bSJan Höppner ccw->count = sizeof(*vsq); 1539c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1540c729696bSJan Höppner ccw->cda = (__u32)(addr_t)vsq; 1541c729696bSJan Höppner 1542c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1543c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1544c729696bSJan Höppner cqr->startdev = device; 1545c729696bSJan Höppner cqr->memdev = device; 1546c729696bSJan Höppner cqr->block = NULL; 1547c729696bSJan Höppner cqr->retries = 256; 1548c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1549c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1550c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1551c729696bSJan Höppner 1552c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1553c729696bSJan Höppner if (rc == 0) { 1554c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1555c729696bSJan Höppner } else { 1556dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1557dd454839SJan Höppner "Reading the volume storage information failed with rc=%d", rc); 1558c729696bSJan Höppner } 1559c729696bSJan Höppner 15609e12e54cSJan Höppner if (useglobal) 15619e12e54cSJan Höppner mutex_unlock(&dasd_vol_info_mutex); 15629e12e54cSJan Höppner else 1563c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1564c729696bSJan Höppner 1565c729696bSJan Höppner return rc; 1566c729696bSJan Höppner } 1567c729696bSJan Höppner 1568c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1569c729696bSJan Höppner { 1570c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1571c729696bSJan Höppner 1572c729696bSJan Höppner return private->vsq.vol_info.ese; 1573c729696bSJan Höppner } 1574c729696bSJan Höppner 1575c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1576c729696bSJan Höppner { 1577c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1578c729696bSJan Höppner 1579c729696bSJan Höppner return private->vsq.extent_pool_id; 1580c729696bSJan Höppner } 1581c729696bSJan Höppner 1582c729696bSJan Höppner /* 1583c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1584c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1585c729696bSJan Höppner * The data for this value is therefore updated on any call. 1586c729696bSJan Höppner */ 1587c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1588c729696bSJan Höppner { 1589c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1590c729696bSJan Höppner int rc; 1591c729696bSJan Höppner 1592c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1593c729696bSJan Höppner 1594c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1595c729696bSJan Höppner } 1596c729696bSJan Höppner 1597c729696bSJan Höppner /* 1598c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1599c729696bSJan Höppner * therefore updated on any call. 1600c729696bSJan Höppner */ 1601c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1602c729696bSJan Höppner { 1603c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1604c729696bSJan Höppner int rc; 1605c729696bSJan Höppner 1606c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1607c729696bSJan Höppner 1608c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1609c729696bSJan Höppner } 1610c729696bSJan Höppner 1611c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1612c729696bSJan Höppner { 1613c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1614c729696bSJan Höppner 1615c729696bSJan Höppner return private->vsq.logical_capacity; 1616c729696bSJan Höppner } 1617c729696bSJan Höppner 16189e12e54cSJan Höppner static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) 16199e12e54cSJan Höppner { 16209e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 16219e12e54cSJan Höppner struct dasd_device *device; 16229e12e54cSJan Höppner struct dasd_device *base; 16239e12e54cSJan Höppner 16249e12e54cSJan Höppner data = container_of(work, struct ext_pool_exhaust_work_data, worker); 16259e12e54cSJan Höppner device = data->device; 16269e12e54cSJan Höppner base = data->base; 16279e12e54cSJan Höppner 16289e12e54cSJan Höppner if (!base) 16299e12e54cSJan Höppner base = device; 16309e12e54cSJan Höppner if (dasd_eckd_space_configured(base) != 0) { 16319e12e54cSJan Höppner dasd_generic_space_avail(device); 16329e12e54cSJan Höppner } else { 16339e12e54cSJan Höppner dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); 16349e12e54cSJan Höppner DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); 16359e12e54cSJan Höppner } 16369e12e54cSJan Höppner 16379e12e54cSJan Höppner dasd_put_device(device); 16389e12e54cSJan Höppner kfree(data); 16399e12e54cSJan Höppner } 16409e12e54cSJan Höppner 16419e12e54cSJan Höppner static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, 16429e12e54cSJan Höppner struct dasd_ccw_req *cqr) 16439e12e54cSJan Höppner { 16449e12e54cSJan Höppner struct ext_pool_exhaust_work_data *data; 16459e12e54cSJan Höppner 16469e12e54cSJan Höppner data = kzalloc(sizeof(*data), GFP_ATOMIC); 16479e12e54cSJan Höppner if (!data) 16489e12e54cSJan Höppner return -ENOMEM; 16499e12e54cSJan Höppner INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); 16509e12e54cSJan Höppner dasd_get_device(device); 16519e12e54cSJan Höppner data->device = device; 16529e12e54cSJan Höppner 16539e12e54cSJan Höppner if (cqr->block) 16549e12e54cSJan Höppner data->base = cqr->block->base; 16559e12e54cSJan Höppner else if (cqr->basedev) 16569e12e54cSJan Höppner data->base = cqr->basedev; 16579e12e54cSJan Höppner else 16589e12e54cSJan Höppner data->base = NULL; 16599e12e54cSJan Höppner 16609e12e54cSJan Höppner schedule_work(&data->worker); 16619e12e54cSJan Höppner 16629e12e54cSJan Höppner return 0; 16639e12e54cSJan Höppner } 16649e12e54cSJan Höppner 1665c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1666c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1667c729696bSJan Höppner { 1668c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1669c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1670c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1671c729696bSJan Höppner int i; 1672c729696bSJan Höppner 1673c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1674c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1675c729696bSJan Höppner if (eps.pool_id == pool_id) { 1676c729696bSJan Höppner memcpy(&private->eps, &eps, 1677c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1678c729696bSJan Höppner } 1679c729696bSJan Höppner } 1680c729696bSJan Höppner } 1681c729696bSJan Höppner 1682c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1683c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1684c729696bSJan Höppner { 1685c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1686c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1687c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1688c729696bSJan Höppner struct dasd_ccw_req *cqr; 1689c729696bSJan Höppner struct ccw1 *ccw; 1690c729696bSJan Höppner int rc; 1691c729696bSJan Höppner 1692c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1693c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1694c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1695c729696bSJan Höppner return 0; 1696c729696bSJan Höppner 1697c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1698c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1699c729696bSJan Höppner if (IS_ERR(cqr)) { 1700c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1701c729696bSJan Höppner "Could not allocate initialization request"); 1702c729696bSJan Höppner return PTR_ERR(cqr); 1703c729696bSJan Höppner } 1704c729696bSJan Höppner 1705c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1706c729696bSJan Höppner prssdp = cqr->data; 1707c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1708c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1709c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1710c729696bSJan Höppner 1711c729696bSJan Höppner ccw = cqr->cpaddr; 1712c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1713c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1714c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1715c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1716c729696bSJan Höppner 1717c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1718c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1719c729696bSJan Höppner 1720c729696bSJan Höppner ccw++; 1721c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1722c729696bSJan Höppner ccw->count = sizeof(*lcq); 1723c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1724c729696bSJan Höppner ccw->cda = (__u32)(addr_t)lcq; 1725c729696bSJan Höppner 1726c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1727c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1728c729696bSJan Höppner cqr->startdev = device; 1729c729696bSJan Höppner cqr->memdev = device; 1730c729696bSJan Höppner cqr->block = NULL; 1731c729696bSJan Höppner cqr->retries = 256; 1732c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1733c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1734c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1735c729696bSJan Höppner 1736c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1737c729696bSJan Höppner if (rc == 0) { 1738c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1739c729696bSJan Höppner } else { 1740dd454839SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1741dd454839SJan Höppner "Reading the logical configuration failed with rc=%d", rc); 1742c729696bSJan Höppner } 1743c729696bSJan Höppner 1744c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1745c729696bSJan Höppner 1746c729696bSJan Höppner return rc; 1747c729696bSJan Höppner } 1748c729696bSJan Höppner 1749c729696bSJan Höppner /* 1750c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1751c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1752c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1753c729696bSJan Höppner */ 1754c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1755c729696bSJan Höppner { 1756c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1757c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1758c729696bSJan Höppner 1759c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1760c729696bSJan Höppner return 0; 1761c729696bSJan Höppner if (eps.extent_size.size_1G) 1762c729696bSJan Höppner return 1113; 1763c729696bSJan Höppner if (eps.extent_size.size_16M) 1764c729696bSJan Höppner return 21; 1765c729696bSJan Höppner 1766c729696bSJan Höppner return 0; 1767c729696bSJan Höppner } 1768c729696bSJan Höppner 1769c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1770c729696bSJan Höppner { 1771c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1772c729696bSJan Höppner 1773c729696bSJan Höppner return private->eps.warn_thrshld; 1774c729696bSJan Höppner } 1775c729696bSJan Höppner 1776c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1777c729696bSJan Höppner { 1778c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1779c729696bSJan Höppner 1780c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1781c729696bSJan Höppner } 1782c729696bSJan Höppner 1783c729696bSJan Höppner /* 1784c729696bSJan Höppner * Extent Pool out of space 1785c729696bSJan Höppner */ 1786c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1787c729696bSJan Höppner { 1788c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1789c729696bSJan Höppner 1790c729696bSJan Höppner return private->eps.flags.pool_oos; 1791c729696bSJan Höppner } 17928e09f215SStefan Weinhuber 17933d052595SHorst Hummel /* 179440545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 179540545573SHorst Hummel */ 1796f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1797f3eb5384SStefan Weinhuber int enable_pav) 179840545573SHorst Hummel { 179940545573SHorst Hummel struct dasd_ccw_req *cqr; 180040545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 180140545573SHorst Hummel struct ccw1 *ccw; 180240545573SHorst Hummel 180368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 180440545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1805c5205f2fSSebastian Ott device, NULL); 180640545573SHorst Hummel 180740545573SHorst Hummel if (IS_ERR(cqr)) { 1808fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 180940545573SHorst Hummel "Could not allocate PSF-SSC request"); 181040545573SHorst Hummel return cqr; 181140545573SHorst Hummel } 181240545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 181340545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1814626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1815f3eb5384SStefan Weinhuber if (enable_pav) { 1816626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 18178e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1818f3eb5384SStefan Weinhuber } 181940545573SHorst Hummel ccw = cqr->cpaddr; 182040545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 182140545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 182240545573SHorst Hummel ccw->count = 66; 182340545573SHorst Hummel 18248e09f215SStefan Weinhuber cqr->startdev = device; 18258e09f215SStefan Weinhuber cqr->memdev = device; 18268e09f215SStefan Weinhuber cqr->block = NULL; 1827eb6e199bSStefan Weinhuber cqr->retries = 256; 182840545573SHorst Hummel cqr->expires = 10*HZ; 18291aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 183040545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 183140545573SHorst Hummel return cqr; 183240545573SHorst Hummel } 183340545573SHorst Hummel 183440545573SHorst Hummel /* 183540545573SHorst Hummel * Perform Subsystem Function. 183640545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 183740545573SHorst Hummel * call might change behaviour of DASD devices. 183840545573SHorst Hummel */ 183940545573SHorst Hummel static int 184012d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 184112d7b107SStefan Haberland unsigned long flags) 184240545573SHorst Hummel { 184340545573SHorst Hummel struct dasd_ccw_req *cqr; 184440545573SHorst Hummel int rc; 184540545573SHorst Hummel 1846f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 184740545573SHorst Hummel if (IS_ERR(cqr)) 184840545573SHorst Hummel return PTR_ERR(cqr); 184940545573SHorst Hummel 185012d7b107SStefan Haberland /* 185112d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 185212d7b107SStefan Haberland * the calling function should handle failed requests 185312d7b107SStefan Haberland */ 185412d7b107SStefan Haberland cqr->flags |= flags; 185512d7b107SStefan Haberland 185640545573SHorst Hummel rc = dasd_sleep_on(cqr); 185740545573SHorst Hummel if (!rc) 185840545573SHorst Hummel /* trigger CIO to reprobe devices */ 185940545573SHorst Hummel css_schedule_reprobe(); 186012d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 186112d7b107SStefan Haberland rc = -EAGAIN; 186212d7b107SStefan Haberland 18638e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 186440545573SHorst Hummel return rc; 186540545573SHorst Hummel } 186640545573SHorst Hummel 186740545573SHorst Hummel /* 186840545573SHorst Hummel * Valide storage server of current device. 186940545573SHorst Hummel */ 187012d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 187112d7b107SStefan Haberland unsigned long flags) 187240545573SHorst Hummel { 1873543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1874543691a4SSebastian Ott int enable_pav, rc; 187540545573SHorst Hummel 1876f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1877f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 187812d7b107SStefan Haberland return 0; 187940545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1880f3eb5384SStefan Weinhuber enable_pav = 0; 1881f3eb5384SStefan Weinhuber else 1882f3eb5384SStefan Weinhuber enable_pav = 1; 188312d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1884eb6e199bSStefan Weinhuber 188540545573SHorst Hummel /* may be requested feature is not available on server, 188640545573SHorst Hummel * therefore just report error and go ahead */ 1887b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1888b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 188912d7b107SStefan Haberland return rc; 189040545573SHorst Hummel } 189140545573SHorst Hummel 1892f1633031SStefan Haberland /* 1893f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1894f1633031SStefan Haberland */ 1895f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1896f1633031SStefan Haberland { 1897f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1898f1633031SStefan Haberland kick_validate); 1899ea4da6eaSStefan Haberland unsigned long flags = 0; 1900ea4da6eaSStefan Haberland 1901ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1902ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 190312d7b107SStefan Haberland == -EAGAIN) { 190412d7b107SStefan Haberland /* schedule worker again if failed */ 190512d7b107SStefan Haberland schedule_work(&device->kick_validate); 190612d7b107SStefan Haberland return; 190712d7b107SStefan Haberland } 190812d7b107SStefan Haberland 1909f1633031SStefan Haberland dasd_put_device(device); 1910f1633031SStefan Haberland } 1911f1633031SStefan Haberland 1912f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1913f1633031SStefan Haberland { 1914f1633031SStefan Haberland dasd_get_device(device); 191525e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 191625e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 191725e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 191825e2cf1cSStefan Haberland dasd_put_device(device); 191925e2cf1cSStefan Haberland return; 192025e2cf1cSStefan Haberland } 1921f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1922f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1923f2608cd4SStefan Haberland dasd_put_device(device); 1924f1633031SStefan Haberland } 1925f1633031SStefan Haberland 192640545573SHorst Hummel /* 19273d052595SHorst Hummel * Check device characteristics. 19283d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 19293d052595SHorst Hummel */ 19301da177e4SLinus Torvalds static int 19311da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 19321da177e4SLinus Torvalds { 1933543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19348e09f215SStefan Weinhuber struct dasd_block *block; 19352dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1936f9f8d02fSStefan Haberland int rc, i; 193733b62a30SStefan Weinhuber int readonly; 19387c8faa86SStefan Haberland unsigned long value; 19391da177e4SLinus Torvalds 1940f1633031SStefan Haberland /* setup work queue for validate server*/ 1941f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 194259a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 194359a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1944f1633031SStefan Haberland 1945454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1946454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1947454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1948454e1fa1SPeter Oberparleiter return -EIO; 1949454e1fa1SPeter Oberparleiter } 1950454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1951454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1952454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1953454e1fa1SPeter Oberparleiter } 195492636b15SSebastian Ott if (!private) { 195592636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 195692636b15SSebastian Ott if (!private) { 1957fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1958fc19f381SStefan Haberland "Allocating memory for private DASD data " 1959fc19f381SStefan Haberland "failed\n"); 19601da177e4SLinus Torvalds return -ENOMEM; 19611da177e4SLinus Torvalds } 1962543691a4SSebastian Ott device->private = private; 196392636b15SSebastian Ott } else { 196492636b15SSebastian Ott memset(private, 0, sizeof(*private)); 19651da177e4SLinus Torvalds } 19661da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 19671da177e4SLinus Torvalds private->init_cqr_status = -1; 19681da177e4SLinus Torvalds /* Set default cache operations. */ 19691da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 19701da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 19711da177e4SLinus Torvalds 197240545573SHorst Hummel /* Read Configuration Data */ 197340545573SHorst Hummel rc = dasd_eckd_read_conf(device); 197440545573SHorst Hummel if (rc) 19758e09f215SStefan Weinhuber goto out_err1; 197640545573SHorst Hummel 1977a521b048SStefan Haberland /* set some default values */ 19787c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 19791f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 1980a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1981a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 19821f1ee9adSHannes Reinecke 19837c8faa86SStefan Haberland if (private->gneq) { 19847c8faa86SStefan Haberland value = 1; 19857c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 19867c8faa86SStefan Haberland value = 10 * value; 19877c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 19887c8faa86SStefan Haberland /* do not accept useless values */ 19897c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 19907c8faa86SStefan Haberland device->default_expires = value; 19917c8faa86SStefan Haberland } 19927c8faa86SStefan Haberland 19932dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 19942dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 19958e09f215SStefan Weinhuber block = dasd_alloc_block(); 19968e09f215SStefan Weinhuber if (IS_ERR(block)) { 1997b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1998b8ed5dd5SStefan Haberland "could not allocate dasd " 1999b8ed5dd5SStefan Haberland "block structure"); 20008e09f215SStefan Weinhuber rc = PTR_ERR(block); 20018e09f215SStefan Weinhuber goto out_err1; 20028e09f215SStefan Weinhuber } 20038e09f215SStefan Weinhuber device->block = block; 20048e09f215SStefan Weinhuber block->base = device; 20058e09f215SStefan Weinhuber } 20068e09f215SStefan Weinhuber 2007f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 2008f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 2009f9f8d02fSStefan Haberland if (rc) 20108e09f215SStefan Weinhuber goto out_err2; 2011f9f8d02fSStefan Haberland 201212d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 2013f4ac1d02SStefan Weinhuber 2014f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 2015f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 201640545573SHorst Hummel if (rc) 20178e09f215SStefan Weinhuber goto out_err3; 20188e09f215SStefan Weinhuber 20198e09f215SStefan Weinhuber /* Read Feature Codes */ 202068d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 202140545573SHorst Hummel 2022c729696bSJan Höppner /* Read Volume Information */ 2023dd454839SJan Höppner dasd_eckd_read_vol_info(device); 2024c729696bSJan Höppner 2025c729696bSJan Höppner /* Read Extent Pool Information */ 2026dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 2027c729696bSJan Höppner 20281da177e4SLinus Torvalds /* Read Device Characteristics */ 202968b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 203068b781feSStefan Haberland &private->rdc_data, 64); 20318e09f215SStefan Weinhuber if (rc) { 2032b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 2033b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 20348e09f215SStefan Weinhuber goto out_err3; 20358e09f215SStefan Weinhuber } 203634cd551aSStefan Haberland 203734cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 203834cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 203934cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 204034cd551aSStefan Haberland "support raw-track access\n"); 204134cd551aSStefan Haberland rc = -EINVAL; 204234cd551aSStefan Haberland goto out_err3; 204334cd551aSStefan Haberland } 204434cd551aSStefan Haberland 2045817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 2046b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 2047b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 2048b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 2049b44b0ab3SStefan Weinhuber else 2050b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 2051b44b0ab3SStefan Weinhuber 2052ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 2053ef19298bSStefan Weinhuber 205433b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 205533b62a30SStefan Weinhuber if (readonly) 205633b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 205733b62a30SStefan Weinhuber 20587e64db15SJan Höppner if (dasd_eckd_is_ese(device)) 20597e64db15SJan Höppner dasd_set_feature(device->cdev, DASD_FEATURE_DISCARD, 1); 20607e64db15SJan Höppner 2061fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 206233b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 20631da177e4SLinus Torvalds private->rdc_data.dev_type, 20641da177e4SLinus Torvalds private->rdc_data.dev_model, 20651da177e4SLinus Torvalds private->rdc_data.cu_type, 20661da177e4SLinus Torvalds private->rdc_data.cu_model.model, 2067b44b0ab3SStefan Weinhuber private->real_cyl, 20681da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 206933b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 207033b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 20718e09f215SStefan Weinhuber return 0; 20728e09f215SStefan Weinhuber 20738e09f215SStefan Weinhuber out_err3: 20748e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 20758e09f215SStefan Weinhuber out_err2: 20768e09f215SStefan Weinhuber dasd_free_block(device->block); 20778e09f215SStefan Weinhuber device->block = NULL; 20788e09f215SStefan Weinhuber out_err1: 20794abb08c2SStefan Weinhuber kfree(private->conf_data); 20808e09f215SStefan Weinhuber kfree(device->private); 20818e09f215SStefan Weinhuber device->private = NULL; 20823d052595SHorst Hummel return rc; 20831da177e4SLinus Torvalds } 20841da177e4SLinus Torvalds 20858e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 20868e09f215SStefan Weinhuber { 2087543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 2088b179b037SStefan Haberland int i; 20894abb08c2SStefan Weinhuber 20907c6553d4SStefan Haberland if (!private) 20917c6553d4SStefan Haberland return; 20927c6553d4SStefan Haberland 20938e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 20944abb08c2SStefan Weinhuber private->ned = NULL; 20954abb08c2SStefan Weinhuber private->sneq = NULL; 20964abb08c2SStefan Weinhuber private->vdsneq = NULL; 20974abb08c2SStefan Weinhuber private->gneq = NULL; 20984abb08c2SStefan Weinhuber private->conf_len = 0; 2099b179b037SStefan Haberland for (i = 0; i < 8; i++) { 2100c9346151SStefan Haberland kfree(device->path[i].conf_data); 2101c9346151SStefan Haberland if ((__u8 *)device->path[i].conf_data == 2102b179b037SStefan Haberland private->conf_data) { 2103b179b037SStefan Haberland private->conf_data = NULL; 2104b179b037SStefan Haberland private->conf_len = 0; 2105b179b037SStefan Haberland } 2106c9346151SStefan Haberland device->path[i].conf_data = NULL; 2107a521b048SStefan Haberland device->path[i].cssid = 0; 2108a521b048SStefan Haberland device->path[i].ssid = 0; 2109a521b048SStefan Haberland device->path[i].chpid = 0; 2110b179b037SStefan Haberland } 21114abb08c2SStefan Weinhuber kfree(private->conf_data); 21124abb08c2SStefan Weinhuber private->conf_data = NULL; 21138e09f215SStefan Weinhuber } 21148e09f215SStefan Weinhuber 21151da177e4SLinus Torvalds static struct dasd_ccw_req * 21161da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 21171da177e4SLinus Torvalds { 2118543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21191da177e4SLinus Torvalds struct eckd_count *count_data; 21201da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 21211da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 21221da177e4SLinus Torvalds struct ccw1 *ccw; 21231da177e4SLinus Torvalds int cplength, datasize; 21241da177e4SLinus Torvalds int i; 21251da177e4SLinus Torvalds 21261da177e4SLinus Torvalds cplength = 8; 21271da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2128c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2129c5205f2fSSebastian Ott NULL); 21301da177e4SLinus Torvalds if (IS_ERR(cqr)) 21311da177e4SLinus Torvalds return cqr; 21321da177e4SLinus Torvalds ccw = cqr->cpaddr; 2133ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2134ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 213545f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 21361da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 21371da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 21381da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21391da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 21401da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 21411da177e4SLinus Torvalds 21421da177e4SLinus Torvalds count_data = private->count_area; 21431da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 21441da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21451da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 21461da177e4SLinus Torvalds ccw->flags = 0; 21471da177e4SLinus Torvalds ccw->count = 8; 21481da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 21491da177e4SLinus Torvalds ccw++; 21501da177e4SLinus Torvalds count_data++; 21511da177e4SLinus Torvalds } 21521da177e4SLinus Torvalds 2153ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 21541da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2155ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 21561da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 21571da177e4SLinus Torvalds /* Read count ccw. */ 21581da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21591da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 21601da177e4SLinus Torvalds ccw->flags = 0; 21611da177e4SLinus Torvalds ccw->count = 8; 21621da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 21631da177e4SLinus Torvalds 21648e09f215SStefan Weinhuber cqr->block = NULL; 21658e09f215SStefan Weinhuber cqr->startdev = device; 21668e09f215SStefan Weinhuber cqr->memdev = device; 2167eb6e199bSStefan Weinhuber cqr->retries = 255; 21681aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 21691da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 21709e12e54cSJan Höppner /* Set flags to suppress output for expected errors */ 21719e12e54cSJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 21729e12e54cSJan Höppner 21731da177e4SLinus Torvalds return cqr; 21741da177e4SLinus Torvalds } 21751da177e4SLinus Torvalds 2176eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2177eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2178eb6e199bSStefan Weinhuber { 2179eb6e199bSStefan Weinhuber char *sense; 2180eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2181eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2182eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2183eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2184eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2185eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2186eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2187eb6e199bSStefan Weinhuber else 2188eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2189eb6e199bSStefan Weinhuber } else 2190eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2191eb6e199bSStefan Weinhuber } 2192eb6e199bSStefan Weinhuber 21931da177e4SLinus Torvalds /* 21941da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 21951da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 21961da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 21971da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 21981da177e4SLinus Torvalds * for deletion in the meantime). 21991da177e4SLinus Torvalds */ 2200eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2201eb6e199bSStefan Weinhuber void *data) 22021da177e4SLinus Torvalds { 2203543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2204543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22051da177e4SLinus Torvalds 2206eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 22071da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 22081da177e4SLinus Torvalds dasd_kick_device(device); 22091da177e4SLinus Torvalds } 22101da177e4SLinus Torvalds 2211eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 22121da177e4SLinus Torvalds { 22131da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 22141da177e4SLinus Torvalds 22158e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 22161da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 22171da177e4SLinus Torvalds return PTR_ERR(init_cqr); 22181da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 22191da177e4SLinus Torvalds init_cqr->callback_data = NULL; 22201da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2221eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2222eb6e199bSStefan Weinhuber * devices as special case 2223eb6e199bSStefan Weinhuber */ 2224eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2225eb6e199bSStefan Weinhuber init_cqr->retries = 0; 22261da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 22271da177e4SLinus Torvalds return -EAGAIN; 22281da177e4SLinus Torvalds } 22291da177e4SLinus Torvalds 2230eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 22311da177e4SLinus Torvalds { 2232543691a4SSebastian Ott struct dasd_device *device = block->base; 2233543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 22341da177e4SLinus Torvalds struct eckd_count *count_area; 22351da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 22361da177e4SLinus Torvalds int status, i; 2237eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 22381da177e4SLinus Torvalds 22391da177e4SLinus Torvalds status = private->init_cqr_status; 22401da177e4SLinus Torvalds private->init_cqr_status = -1; 2241eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2242eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2243eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2244eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2245eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2246eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2247eb6e199bSStefan Weinhuber } 2248eb6e199bSStefan Weinhuber 2249e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2250e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2251e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2252e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2253e4dbb0f2SStefan Haberland goto raw; 2254e4dbb0f2SStefan Haberland } 2255e4dbb0f2SStefan Haberland 2256eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2257eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 22581da177e4SLinus Torvalds return -EMEDIUMTYPE; 2259eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2260eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2261eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2262eb6e199bSStefan Weinhuber "of an I/O error\n"); 2263eb6e199bSStefan Weinhuber return -EIO; 22641da177e4SLinus Torvalds } 22651da177e4SLinus Torvalds 22661da177e4SLinus Torvalds private->uses_cdl = 1; 22671da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 22681da177e4SLinus Torvalds count_area = NULL; 22691da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 22701da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 22713bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 22723bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 22733bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22743bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 22751da177e4SLinus Torvalds private->uses_cdl = 0; 22761da177e4SLinus Torvalds break; 22771da177e4SLinus Torvalds } 22781da177e4SLinus Torvalds } 22791da177e4SLinus Torvalds if (i == 3) 2280ce6915f5SJan Höppner count_area = &private->count_area[3]; 22811da177e4SLinus Torvalds 22821da177e4SLinus Torvalds if (private->uses_cdl == 0) { 22831da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 22841da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 22851da177e4SLinus Torvalds (private->count_area[i].dl != 22863bc9fef9SStefan Haberland private->count_area[0].dl) || 22873bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 22883bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22893bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 22901da177e4SLinus Torvalds break; 22911da177e4SLinus Torvalds } 22921da177e4SLinus Torvalds if (i == 5) 22931da177e4SLinus Torvalds count_area = &private->count_area[0]; 22941da177e4SLinus Torvalds } else { 22951da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2296fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2297fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 22981da177e4SLinus Torvalds } 2299e4dbb0f2SStefan Haberland 23001da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 23011da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 23021da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 23038e09f215SStefan Weinhuber block->bp_block = count_area->dl; 23041da177e4SLinus Torvalds } 23058e09f215SStefan Weinhuber if (block->bp_block == 0) { 2306fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2307fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 23081da177e4SLinus Torvalds return -EMEDIUMTYPE; 23091da177e4SLinus Torvalds } 23108e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 23118e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 23128e09f215SStefan Weinhuber block->s2b_shift++; 23131da177e4SLinus Torvalds 23148e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2315e4dbb0f2SStefan Haberland 2316e4dbb0f2SStefan Haberland raw: 23172cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 23181da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23191da177e4SLinus Torvalds blk_per_trk); 23201da177e4SLinus Torvalds 2321fc19f381SStefan Haberland dev_info(&device->cdev->dev, 23222cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2323fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 23242cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 23251da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 23268e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 23278e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 23281da177e4SLinus Torvalds private->uses_cdl ? 23291da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 23301da177e4SLinus Torvalds 23311da177e4SLinus Torvalds return 0; 23321da177e4SLinus Torvalds } 23331da177e4SLinus Torvalds 23348e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 23351da177e4SLinus Torvalds { 2336543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 23371da177e4SLinus Torvalds 23381da177e4SLinus Torvalds if (private->init_cqr_status < 0) 23398e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 23401da177e4SLinus Torvalds else 23418e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 23421da177e4SLinus Torvalds } 23431da177e4SLinus Torvalds 2344d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 23458e09f215SStefan Weinhuber { 23468e09f215SStefan Weinhuber return dasd_alias_add_device(device); 23478e09f215SStefan Weinhuber }; 23488e09f215SStefan Weinhuber 23498e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 23508e09f215SStefan Weinhuber { 2351669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2352669f3765SStefan Haberland dasd_put_device(device); 2353669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2354669f3765SStefan Haberland dasd_put_device(device); 2355669f3765SStefan Haberland 2356d42e1712SStefan Haberland return 0; 2357d42e1712SStefan Haberland }; 2358d42e1712SStefan Haberland 2359daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2360d42e1712SStefan Haberland { 23618e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 23628e09f215SStefan Weinhuber }; 23638e09f215SStefan Weinhuber 23641da177e4SLinus Torvalds static int 23658e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 23661da177e4SLinus Torvalds { 2367543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 23681da177e4SLinus Torvalds 23698e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 23701da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 23718e09f215SStefan Weinhuber 0, block->bp_block); 23721da177e4SLinus Torvalds } 23731da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 23741da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 23751da177e4SLinus Torvalds return 0; 23761da177e4SLinus Torvalds } 23771da177e4SLinus Torvalds 23788fd57520SJan Höppner /* 23798fd57520SJan Höppner * Build the TCW request for the format check 23808fd57520SJan Höppner */ 23818fd57520SJan Höppner static struct dasd_ccw_req * 23828fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 23838fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 23848fd57520SJan Höppner int rpt) 23858fd57520SJan Höppner { 23868fd57520SJan Höppner struct dasd_eckd_private *start_priv; 23878fd57520SJan Höppner struct dasd_device *startdev = NULL; 23888fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 23898fd57520SJan Höppner struct dasd_ccw_req *cqr; 23908fd57520SJan Höppner struct itcw *itcw; 23918fd57520SJan Höppner int itcw_size; 23928fd57520SJan Höppner int count; 23938fd57520SJan Höppner int rc; 23948fd57520SJan Höppner int i; 23958fd57520SJan Höppner 23968fd57520SJan Höppner if (enable_pav) 23978fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 23988fd57520SJan Höppner 23998fd57520SJan Höppner if (!startdev) 24008fd57520SJan Höppner startdev = base; 24018fd57520SJan Höppner 24028fd57520SJan Höppner start_priv = startdev->private; 24038fd57520SJan Höppner 24048fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24058fd57520SJan Höppner 24068fd57520SJan Höppner /* 24078fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 24088fd57520SJan Höppner * calculate the corresponding itcw_size 24098fd57520SJan Höppner */ 24108fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 24118fd57520SJan Höppner 24125e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 24138fd57520SJan Höppner if (IS_ERR(cqr)) 24148fd57520SJan Höppner return cqr; 24158fd57520SJan Höppner 24168fd57520SJan Höppner start_priv->count++; 24178fd57520SJan Höppner 24188fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 24198fd57520SJan Höppner if (IS_ERR(itcw)) { 24208fd57520SJan Höppner rc = -EINVAL; 24218fd57520SJan Höppner goto out_err; 24228fd57520SJan Höppner } 24238fd57520SJan Höppner 24248fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 24258fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 24268fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 24278fd57520SJan Höppner sizeof(struct eckd_count), 24288fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 24298fd57520SJan Höppner if (rc) 24308fd57520SJan Höppner goto out_err; 24318fd57520SJan Höppner 24328fd57520SJan Höppner for (i = 0; i < count; i++) { 24338fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 24348fd57520SJan Höppner sizeof(struct eckd_count)); 24358fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 24368fd57520SJan Höppner rc = -EINVAL; 24378fd57520SJan Höppner goto out_err; 24388fd57520SJan Höppner } 24398fd57520SJan Höppner } 24408fd57520SJan Höppner 24418fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 24428fd57520SJan Höppner itcw_finalize(itcw); 24438fd57520SJan Höppner 24448fd57520SJan Höppner cqr->cpmode = 1; 24458fd57520SJan Höppner cqr->startdev = startdev; 24468fd57520SJan Höppner cqr->memdev = startdev; 24478fd57520SJan Höppner cqr->basedev = base; 24488fd57520SJan Höppner cqr->retries = startdev->default_retries; 24498fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 24508fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 24518fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 24528fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 24538fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 24548fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 24558fd57520SJan Höppner 24568fd57520SJan Höppner return cqr; 24578fd57520SJan Höppner 24588fd57520SJan Höppner out_err: 24598fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 24608fd57520SJan Höppner 24618fd57520SJan Höppner return ERR_PTR(rc); 24628fd57520SJan Höppner } 24638fd57520SJan Höppner 24648fd57520SJan Höppner /* 24658fd57520SJan Höppner * Build the CCW request for the format check 24668fd57520SJan Höppner */ 24678fd57520SJan Höppner static struct dasd_ccw_req * 24688fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 24698fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 24708fd57520SJan Höppner { 24718fd57520SJan Höppner struct dasd_eckd_private *start_priv; 24728fd57520SJan Höppner struct dasd_eckd_private *base_priv; 24738fd57520SJan Höppner struct dasd_device *startdev = NULL; 24748fd57520SJan Höppner struct dasd_ccw_req *cqr; 24758fd57520SJan Höppner struct ccw1 *ccw; 24768fd57520SJan Höppner void *data; 24778fd57520SJan Höppner int cplength, datasize; 24788fd57520SJan Höppner int use_prefix; 24798fd57520SJan Höppner int count; 24808fd57520SJan Höppner int i; 24818fd57520SJan Höppner 24828fd57520SJan Höppner if (enable_pav) 24838fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 24848fd57520SJan Höppner 24858fd57520SJan Höppner if (!startdev) 24868fd57520SJan Höppner startdev = base; 24878fd57520SJan Höppner 24888fd57520SJan Höppner start_priv = startdev->private; 24898fd57520SJan Höppner base_priv = base->private; 24908fd57520SJan Höppner 24918fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24928fd57520SJan Höppner 24938fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 24948fd57520SJan Höppner 24958fd57520SJan Höppner if (use_prefix) { 24968fd57520SJan Höppner cplength = 1; 24978fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 24988fd57520SJan Höppner } else { 24998fd57520SJan Höppner cplength = 2; 25008fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 25018fd57520SJan Höppner sizeof(struct LO_eckd_data); 25028fd57520SJan Höppner } 25038fd57520SJan Höppner cplength += count; 25048fd57520SJan Höppner 25055e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 25068fd57520SJan Höppner if (IS_ERR(cqr)) 25078fd57520SJan Höppner return cqr; 25088fd57520SJan Höppner 25098fd57520SJan Höppner start_priv->count++; 25108fd57520SJan Höppner data = cqr->data; 25118fd57520SJan Höppner ccw = cqr->cpaddr; 25128fd57520SJan Höppner 25138fd57520SJan Höppner if (use_prefix) { 25148fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 25158fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 25168fd57520SJan Höppner count, 0, 0); 25178fd57520SJan Höppner } else { 25188fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 251945f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 25208fd57520SJan Höppner 25218fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 25228fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25238fd57520SJan Höppner 25248fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 25258fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 25268fd57520SJan Höppner } 25278fd57520SJan Höppner 25288fd57520SJan Höppner for (i = 0; i < count; i++) { 25298fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 25308fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 25318fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 25328fd57520SJan Höppner ccw->count = 8; 25338fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 25348fd57520SJan Höppner ccw++; 25358fd57520SJan Höppner fmt_buffer++; 25368fd57520SJan Höppner } 25378fd57520SJan Höppner 25388fd57520SJan Höppner cqr->startdev = startdev; 25398fd57520SJan Höppner cqr->memdev = startdev; 25408fd57520SJan Höppner cqr->basedev = base; 25418fd57520SJan Höppner cqr->retries = DASD_RETRIES; 25428fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 25438fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 25448fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 25458fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 25468fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 25478fd57520SJan Höppner 25488fd57520SJan Höppner return cqr; 25498fd57520SJan Höppner } 25508fd57520SJan Höppner 25511da177e4SLinus Torvalds static struct dasd_ccw_req * 25525e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 25535e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 25541da177e4SLinus Torvalds { 2555d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2556d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 25571da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 25581da177e4SLinus Torvalds struct eckd_count *ect; 2559d42e1712SStefan Haberland struct ch_t address; 25601da177e4SLinus Torvalds struct ccw1 *ccw; 25611da177e4SLinus Torvalds void *data; 2562b44b0ab3SStefan Weinhuber int rpt; 25631da177e4SLinus Torvalds int cplength, datasize; 2564d42e1712SStefan Haberland int i, j; 2565f9a28f7bSJean-Baptiste Joret int intensity = 0; 2566f9a28f7bSJean-Baptiste Joret int r0_perm; 2567d42e1712SStefan Haberland int nr_tracks; 256818d6624eSStefan Haberland int use_prefix; 25691da177e4SLinus Torvalds 2570a94fa154SStefan Haberland if (enable_pav) 2571d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 257229b8dd9dSStefan Haberland 2573d42e1712SStefan Haberland if (!startdev) 2574d42e1712SStefan Haberland startdev = base; 25751da177e4SLinus Torvalds 2576543691a4SSebastian Ott start_priv = startdev->private; 2577543691a4SSebastian Ott base_priv = base->private; 2578d42e1712SStefan Haberland 2579d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2580d42e1712SStefan Haberland 2581d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 25821da177e4SLinus Torvalds 25831da177e4SLinus Torvalds /* 25841da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 25851da177e4SLinus Torvalds * Bit 0: write record zero 25861da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 25871da177e4SLinus Torvalds * Bit 2: invalidate tracks 25881da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2589f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 25901da177e4SLinus Torvalds * Only some bit combinations do make sense. 25911da177e4SLinus Torvalds */ 2592f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2593f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2594f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2595f9a28f7bSJean-Baptiste Joret } else { 2596f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2597f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2598f9a28f7bSJean-Baptiste Joret } 2599d42e1712SStefan Haberland 260018d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 260118d6624eSStefan Haberland 2602f9a28f7bSJean-Baptiste Joret switch (intensity) { 26031da177e4SLinus Torvalds case 0x00: /* Normal format */ 26041da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2605d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 260618d6624eSStefan Haberland if (use_prefix) 2607d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26081da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2609d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 261018d6624eSStefan Haberland else 261118d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 261218d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 261318d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26141da177e4SLinus Torvalds break; 26151da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 26161da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2617d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 261818d6624eSStefan Haberland if (use_prefix) 2619d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26201da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26211da177e4SLinus Torvalds sizeof(struct eckd_count) + 2622d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 262318d6624eSStefan Haberland else 262418d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 262518d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 262618d6624eSStefan Haberland sizeof(struct eckd_count) + 262718d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 26281da177e4SLinus Torvalds break; 26291da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 26301da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 26311da177e4SLinus Torvalds cplength = 3; 263218d6624eSStefan Haberland if (use_prefix) 2633d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 26341da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 26351da177e4SLinus Torvalds sizeof(struct eckd_count); 263618d6624eSStefan Haberland else 263718d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 263818d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 263918d6624eSStefan Haberland sizeof(struct eckd_count); 26401da177e4SLinus Torvalds break; 26411da177e4SLinus Torvalds default: 2642d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2643d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2644d42e1712SStefan Haberland fdata->intensity); 26451da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26461da177e4SLinus Torvalds } 26475e2b17e7SJan Höppner 26485e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 26491da177e4SLinus Torvalds if (IS_ERR(fcp)) 26501da177e4SLinus Torvalds return fcp; 26511da177e4SLinus Torvalds 2652d42e1712SStefan Haberland start_priv->count++; 26531da177e4SLinus Torvalds data = fcp->data; 26541da177e4SLinus Torvalds ccw = fcp->cpaddr; 26551da177e4SLinus Torvalds 2656f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 26571da177e4SLinus Torvalds case 0x00: /* Normal format. */ 265818d6624eSStefan Haberland if (use_prefix) { 2659d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2660d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2661d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2662f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2663f9a28f7bSJean-Baptiste Joret if (r0_perm) 2664d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2665d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2666d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 266718d6624eSStefan Haberland } else { 266818d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 266918d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 267045f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 267118d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 267218d6624eSStefan Haberland if (r0_perm) 267318d6624eSStefan Haberland ((struct DE_eckd_data *) data) 267418d6624eSStefan Haberland ->ga_extended |= 0x04; 267518d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 267618d6624eSStefan Haberland } 26771da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26781da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2679d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2680d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 26811da177e4SLinus Torvalds fdata->blksize); 26821da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26831da177e4SLinus Torvalds break; 26841da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 268518d6624eSStefan Haberland if (use_prefix) { 2686d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2687d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 26881da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2689d42e1712SStefan Haberland base, startdev); 2690d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 269118d6624eSStefan Haberland } else { 269218d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 269318d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 269445f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 269518d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 269618d6624eSStefan Haberland } 26971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26981da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2699d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2700d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2701d42e1712SStefan Haberland base->block->bp_block); 27021da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27031da177e4SLinus Torvalds break; 27041da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 270518d6624eSStefan Haberland if (use_prefix) { 2706d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2707d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2708d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2709d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 271018d6624eSStefan Haberland } else { 271118d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 271218d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 271345f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 271418d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 271518d6624eSStefan Haberland } 27161da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27171da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 27181da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2719d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 27201da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 27211da177e4SLinus Torvalds break; 27221da177e4SLinus Torvalds } 2723d42e1712SStefan Haberland 2724d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2725d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2726d42e1712SStefan Haberland set_ch_t(&address, 2727d42e1712SStefan Haberland (fdata->start_unit + j) / 2728d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2729d42e1712SStefan Haberland (fdata->start_unit + j) % 2730d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2731f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 27321da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27331da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2734b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2735b44b0ab3SStefan Weinhuber ect->head = address.head; 27361da177e4SLinus Torvalds ect->record = 0; 27371da177e4SLinus Torvalds ect->kl = 0; 27381da177e4SLinus Torvalds ect->dl = 8; 27391da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27401da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 27411da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27421da177e4SLinus Torvalds ccw->count = 8; 27431da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27441da177e4SLinus Torvalds ccw++; 27451da177e4SLinus Torvalds } 2746f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 27471da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27481da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2749b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2750b44b0ab3SStefan Weinhuber ect->head = address.head; 27511da177e4SLinus Torvalds ect->record = 1; 27521da177e4SLinus Torvalds ect->kl = 0; 27531da177e4SLinus Torvalds ect->dl = 0; 27541da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27551da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 27561da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27571da177e4SLinus Torvalds ccw->count = 8; 27581da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27591da177e4SLinus Torvalds } else { /* write remaining records */ 27601da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 27611da177e4SLinus Torvalds ect = (struct eckd_count *) data; 27621da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2763b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2764b44b0ab3SStefan Weinhuber ect->head = address.head; 27651da177e4SLinus Torvalds ect->record = i + 1; 27661da177e4SLinus Torvalds ect->kl = 0; 27671da177e4SLinus Torvalds ect->dl = fdata->blksize; 2768d42e1712SStefan Haberland /* 2769d42e1712SStefan Haberland * Check for special tracks 0-1 2770d42e1712SStefan Haberland * when formatting CDL 2771d42e1712SStefan Haberland */ 2772f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 277346d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 27741da177e4SLinus Torvalds if (i < 3) { 27751da177e4SLinus Torvalds ect->kl = 4; 27761da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 27771da177e4SLinus Torvalds } 27781da177e4SLinus Torvalds } 2779f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 278046d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 27811da177e4SLinus Torvalds ect->kl = 44; 27821da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 27831da177e4SLinus Torvalds } 27841da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2785d42e1712SStefan Haberland if (i != 0 || j == 0) 2786d42e1712SStefan Haberland ccw->cmd_code = 2787d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2788d42e1712SStefan Haberland else 2789d42e1712SStefan Haberland ccw->cmd_code = 2790d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 27911da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27921da177e4SLinus Torvalds ccw->count = 8; 27931da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27941da177e4SLinus Torvalds ccw++; 27951da177e4SLinus Torvalds } 27961da177e4SLinus Torvalds } 2797d42e1712SStefan Haberland } 2798d42e1712SStefan Haberland 2799d42e1712SStefan Haberland fcp->startdev = startdev; 2800d42e1712SStefan Haberland fcp->memdev = startdev; 280129b8dd9dSStefan Haberland fcp->basedev = base; 2802eb6e199bSStefan Weinhuber fcp->retries = 256; 2803d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 28041aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 28051da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2806d42e1712SStefan Haberland 28071da177e4SLinus Torvalds return fcp; 28081da177e4SLinus Torvalds } 28091da177e4SLinus Torvalds 2810570d237cSJan Höppner /* 2811570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2812570d237cSJan Höppner */ 2813570d237cSJan Höppner static struct dasd_ccw_req * 2814570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 28158fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 28168fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2817d42e1712SStefan Haberland { 28188fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 28198fd57520SJan Höppner 28208fd57520SJan Höppner if (!fmt_buffer) { 28215e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 28228fd57520SJan Höppner } else { 28238fd57520SJan Höppner if (tpm) 28248fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 28258fd57520SJan Höppner enable_pav, 28268fd57520SJan Höppner fmt_buffer, rpt); 28278fd57520SJan Höppner else 28288fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 28298fd57520SJan Höppner fmt_buffer, rpt); 28308fd57520SJan Höppner } 28318fd57520SJan Höppner 28328fd57520SJan Höppner return ccw_req; 2833570d237cSJan Höppner } 2834570d237cSJan Höppner 2835570d237cSJan Höppner /* 2836570d237cSJan Höppner * Sanity checks on format_data 2837570d237cSJan Höppner */ 2838570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2839570d237cSJan Höppner struct format_data_t *fdata) 2840570d237cSJan Höppner { 2841543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2842d42e1712SStefan Haberland 2843d42e1712SStefan Haberland if (fdata->start_unit >= 2844d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2845d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2846d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2847d42e1712SStefan Haberland fdata->start_unit); 2848d42e1712SStefan Haberland return -EINVAL; 2849d42e1712SStefan Haberland } 2850d42e1712SStefan Haberland if (fdata->stop_unit >= 2851d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2852d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2853d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2854d42e1712SStefan Haberland fdata->stop_unit); 2855d42e1712SStefan Haberland return -EINVAL; 2856d42e1712SStefan Haberland } 2857d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2858d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2859d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2860d42e1712SStefan Haberland fdata->start_unit); 2861d42e1712SStefan Haberland return -EINVAL; 2862d42e1712SStefan Haberland } 2863d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2864d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2865d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2866d42e1712SStefan Haberland fdata->blksize); 2867d42e1712SStefan Haberland return -EINVAL; 2868d42e1712SStefan Haberland } 2869570d237cSJan Höppner return 0; 2870570d237cSJan Höppner } 2871570d237cSJan Höppner 2872570d237cSJan Höppner /* 2873570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2874570d237cSJan Höppner */ 2875570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2876570d237cSJan Höppner struct format_data_t *fdata, 28778fd57520SJan Höppner int enable_pav, int tpm, 28788fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 28798fd57520SJan Höppner struct irb *irb) 2880570d237cSJan Höppner { 2881543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2882570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2883570d237cSJan Höppner struct list_head format_queue; 2884570d237cSJan Höppner struct dasd_device *device; 28858fd57520SJan Höppner char *sense = NULL; 2886570d237cSJan Höppner int old_start, old_stop, format_step; 2887570d237cSJan Höppner int step, retry; 2888570d237cSJan Höppner int rc; 2889570d237cSJan Höppner 2890570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2891570d237cSJan Höppner if (rc) 2892570d237cSJan Höppner return rc; 2893d42e1712SStefan Haberland 2894d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2895d42e1712SStefan Haberland 289646d1c03cSJan Höppner old_start = fdata->start_unit; 289729b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2898d42e1712SStefan Haberland 28998fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 29008fd57520SJan Höppner /* Command Mode / Format Check */ 29018fd57520SJan Höppner format_step = 1; 29028fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 29038fd57520SJan Höppner /* Transport Mode / Format Check */ 29048fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 29058fd57520SJan Höppner } else { 29068fd57520SJan Höppner /* Normal Formatting */ 29078fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 29088fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 29098fd57520SJan Höppner } 29108fd57520SJan Höppner 291146d1c03cSJan Höppner do { 291246d1c03cSJan Höppner retry = 0; 2913d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2914d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 291546d1c03cSJan Höppner if (step > format_step) { 291646d1c03cSJan Höppner fdata->stop_unit = 291746d1c03cSJan Höppner fdata->start_unit + format_step - 1; 291846d1c03cSJan Höppner } 2919d42e1712SStefan Haberland 2920570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 29218fd57520SJan Höppner enable_pav, tpm, 29228fd57520SJan Höppner fmt_buffer, rpt); 2923d42e1712SStefan Haberland if (IS_ERR(cqr)) { 292446d1c03cSJan Höppner rc = PTR_ERR(cqr); 292546d1c03cSJan Höppner if (rc == -ENOMEM) { 292646d1c03cSJan Höppner if (list_empty(&format_queue)) 292746d1c03cSJan Höppner goto out; 2928d42e1712SStefan Haberland /* 292946d1c03cSJan Höppner * not enough memory available, start 293046d1c03cSJan Höppner * requests retry after first requests 293146d1c03cSJan Höppner * were finished 2932d42e1712SStefan Haberland */ 293346d1c03cSJan Höppner retry = 1; 293446d1c03cSJan Höppner break; 2935d42e1712SStefan Haberland } 293646d1c03cSJan Höppner goto out_err; 293746d1c03cSJan Höppner } 293846d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2939d42e1712SStefan Haberland 29408fd57520SJan Höppner if (fmt_buffer) { 29418fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 29428fd57520SJan Höppner fmt_buffer += rpt * step; 29438fd57520SJan Höppner } 2944d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2945d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2946d42e1712SStefan Haberland } 2947d42e1712SStefan Haberland 294846d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2949d42e1712SStefan Haberland 295046d1c03cSJan Höppner out_err: 2951d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2952d42e1712SStefan Haberland device = cqr->startdev; 2953543691a4SSebastian Ott private = device->private; 29548fd57520SJan Höppner 29558fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 29568fd57520SJan Höppner /* 29578fd57520SJan Höppner * Only get sense data if called by format 29588fd57520SJan Höppner * check 29598fd57520SJan Höppner */ 29608fd57520SJan Höppner if (fmt_buffer && irb) { 29618fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 29628fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 29638fd57520SJan Höppner } 2964d42e1712SStefan Haberland rc = -EIO; 29658fd57520SJan Höppner } 2966d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 29675e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 2968d42e1712SStefan Haberland private->count--; 2969d42e1712SStefan Haberland } 2970d42e1712SStefan Haberland 29718fd57520SJan Höppner if (rc && rc != -EIO) 297246d1c03cSJan Höppner goto out; 29738fd57520SJan Höppner if (rc == -EIO) { 29748fd57520SJan Höppner /* 29758fd57520SJan Höppner * In case fewer than the expected records are on the 29768fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 29778fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 29788fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 29798fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 29808fd57520SJan Höppner * and continue. 29818fd57520SJan Höppner */ 29828fd57520SJan Höppner if (sense && 29838fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 29848fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 29858fd57520SJan Höppner retry = 1; 29868fd57520SJan Höppner else 29878fd57520SJan Höppner goto out; 29888fd57520SJan Höppner } 298929b8dd9dSStefan Haberland 299046d1c03cSJan Höppner } while (retry); 299146d1c03cSJan Höppner 299246d1c03cSJan Höppner out: 299346d1c03cSJan Höppner fdata->start_unit = old_start; 299446d1c03cSJan Höppner fdata->stop_unit = old_stop; 2995d42e1712SStefan Haberland 2996d42e1712SStefan Haberland return rc; 2997d42e1712SStefan Haberland } 2998d42e1712SStefan Haberland 2999570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 3000570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 3001570d237cSJan Höppner { 30028fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 30038fd57520SJan Höppner 0, NULL); 30048fd57520SJan Höppner } 30058fd57520SJan Höppner 30068fd57520SJan Höppner /* 30075e2b17e7SJan Höppner * Callback function to free ESE format requests. 30085e2b17e7SJan Höppner */ 30095e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 30105e2b17e7SJan Höppner { 30115e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 30125e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 30135e2b17e7SJan Höppner 30145e2b17e7SJan Höppner private->count--; 30155e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 30165e2b17e7SJan Höppner } 30175e2b17e7SJan Höppner 30185e2b17e7SJan Höppner static struct dasd_ccw_req * 30195e2b17e7SJan Höppner dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr) 30205e2b17e7SJan Höppner { 30215e2b17e7SJan Höppner struct dasd_eckd_private *private; 30225e2b17e7SJan Höppner struct format_data_t fdata; 30235e2b17e7SJan Höppner unsigned int recs_per_trk; 30245e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 30255e2b17e7SJan Höppner struct dasd_device *base; 30265e2b17e7SJan Höppner struct dasd_block *block; 30275e2b17e7SJan Höppner unsigned int blksize; 30285e2b17e7SJan Höppner struct request *req; 30295e2b17e7SJan Höppner sector_t first_trk; 30305e2b17e7SJan Höppner sector_t last_trk; 30315e2b17e7SJan Höppner int rc; 30325e2b17e7SJan Höppner 30335e2b17e7SJan Höppner req = cqr->callback_data; 30345e2b17e7SJan Höppner base = cqr->block->base; 30355e2b17e7SJan Höppner private = base->private; 30365e2b17e7SJan Höppner block = base->block; 30375e2b17e7SJan Höppner blksize = block->bp_block; 30385e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 30395e2b17e7SJan Höppner 30405e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 30415e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 30425e2b17e7SJan Höppner last_trk = 30435e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 30445e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 30455e2b17e7SJan Höppner 30465e2b17e7SJan Höppner fdata.start_unit = first_trk; 30475e2b17e7SJan Höppner fdata.stop_unit = last_trk; 30485e2b17e7SJan Höppner fdata.blksize = blksize; 30495e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 30505e2b17e7SJan Höppner 30515e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 30525e2b17e7SJan Höppner if (rc) 30535e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 30545e2b17e7SJan Höppner 30555e2b17e7SJan Höppner /* 30565e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 30575e2b17e7SJan Höppner * the former startdev. 30585e2b17e7SJan Höppner */ 30595e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 30605e2b17e7SJan Höppner if (IS_ERR(fcqr)) 30615e2b17e7SJan Höppner return fcqr; 30625e2b17e7SJan Höppner 30635e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 30645e2b17e7SJan Höppner 30655e2b17e7SJan Höppner return fcqr; 30665e2b17e7SJan Höppner } 30675e2b17e7SJan Höppner 30685e2b17e7SJan Höppner /* 30695e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 30705e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 30715e2b17e7SJan Höppner */ 30725e2b17e7SJan Höppner static void dasd_eckd_ese_read(struct dasd_ccw_req *cqr) 30735e2b17e7SJan Höppner { 30745e2b17e7SJan Höppner unsigned int blksize, off; 30755e2b17e7SJan Höppner struct dasd_device *base; 30765e2b17e7SJan Höppner struct req_iterator iter; 30775e2b17e7SJan Höppner struct request *req; 30785e2b17e7SJan Höppner struct bio_vec bv; 30795e2b17e7SJan Höppner char *dst; 30805e2b17e7SJan Höppner 30815e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 30825e2b17e7SJan Höppner base = cqr->block->base; 30835e2b17e7SJan Höppner blksize = base->block->bp_block; 30845e2b17e7SJan Höppner 30855e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 30865e2b17e7SJan Höppner dst = page_address(bv.bv_page) + bv.bv_offset; 30875e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 30885e2b17e7SJan Höppner if (dst && rq_data_dir(req) == READ) { 30895e2b17e7SJan Höppner dst += off; 30905e2b17e7SJan Höppner memset(dst, 0, blksize); 30915e2b17e7SJan Höppner } 30925e2b17e7SJan Höppner } 30935e2b17e7SJan Höppner } 30945e2b17e7SJan Höppner } 30955e2b17e7SJan Höppner 30965e2b17e7SJan Höppner /* 30978fd57520SJan Höppner * Helper function to count consecutive records of a single track. 30988fd57520SJan Höppner */ 30998fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 31008fd57520SJan Höppner int max) 31018fd57520SJan Höppner { 31028fd57520SJan Höppner int head; 31038fd57520SJan Höppner int i; 31048fd57520SJan Höppner 31058fd57520SJan Höppner head = fmt_buffer[start].head; 31068fd57520SJan Höppner 31078fd57520SJan Höppner /* 31088fd57520SJan Höppner * There are 3 conditions where we stop counting: 31098fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 31108fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 31118fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 31128fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 31138fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 31148fd57520SJan Höppner * record will be 0 then) 31158fd57520SJan Höppner */ 31168fd57520SJan Höppner for (i = start; i < max; i++) { 31178fd57520SJan Höppner if (i > start) { 31188fd57520SJan Höppner if ((fmt_buffer[i].head == head && 31198fd57520SJan Höppner fmt_buffer[i].record == 1) || 31208fd57520SJan Höppner fmt_buffer[i].head != head || 31218fd57520SJan Höppner fmt_buffer[i].record == 0) 31228fd57520SJan Höppner break; 31238fd57520SJan Höppner } 31248fd57520SJan Höppner } 31258fd57520SJan Höppner 31268fd57520SJan Höppner return i - start; 31278fd57520SJan Höppner } 31288fd57520SJan Höppner 31298fd57520SJan Höppner /* 31308fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 31318fd57520SJan Höppner * record ids, and key length are compared with expected data. 31328fd57520SJan Höppner * 31338fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 31348fd57520SJan Höppner * additional information, depending on the error. 31358fd57520SJan Höppner */ 31368fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 31378fd57520SJan Höppner struct format_check_t *cdata, 31388fd57520SJan Höppner int rpt_max, int rpt_exp, 31398fd57520SJan Höppner int trk_per_cyl, int tpm) 31408fd57520SJan Höppner { 31418fd57520SJan Höppner struct ch_t geo; 31428fd57520SJan Höppner int max_entries; 31438fd57520SJan Höppner int count = 0; 31448fd57520SJan Höppner int trkcount; 31458fd57520SJan Höppner int blksize; 31468fd57520SJan Höppner int pos = 0; 31478fd57520SJan Höppner int i, j; 31488fd57520SJan Höppner int kl; 31498fd57520SJan Höppner 31508fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 31518fd57520SJan Höppner max_entries = trkcount * rpt_max; 31528fd57520SJan Höppner 31538fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 31548fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 31558fd57520SJan Höppner if (tpm) { 31568fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 31578fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 31588fd57520SJan Höppner if (pos++ > max_entries) 31598fd57520SJan Höppner break; 31608fd57520SJan Höppner } 31618fd57520SJan Höppner } else { 31628fd57520SJan Höppner if (i != cdata->expect.start_unit) 31638fd57520SJan Höppner pos += rpt_max - count; 31648fd57520SJan Höppner } 31658fd57520SJan Höppner 31668fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 31678fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 31688fd57520SJan Höppner 31698fd57520SJan Höppner /* Count and check number of records */ 31708fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 31718fd57520SJan Höppner 31728fd57520SJan Höppner if (count < rpt_exp) { 31738fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 31748fd57520SJan Höppner break; 31758fd57520SJan Höppner } 31768fd57520SJan Höppner if (count > rpt_exp) { 31778fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 31788fd57520SJan Höppner break; 31798fd57520SJan Höppner } 31808fd57520SJan Höppner 31818fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 31828fd57520SJan Höppner blksize = cdata->expect.blksize; 31838fd57520SJan Höppner kl = 0; 31848fd57520SJan Höppner 31858fd57520SJan Höppner /* 31868fd57520SJan Höppner * Set special values when checking CDL formatted 31878fd57520SJan Höppner * devices. 31888fd57520SJan Höppner */ 31898fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 31908fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 31918fd57520SJan Höppner if (j < 3) { 31928fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 31938fd57520SJan Höppner kl = 4; 31948fd57520SJan Höppner } 31958fd57520SJan Höppner } 31968fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 31978fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 31988fd57520SJan Höppner blksize = LABEL_SIZE - 44; 31998fd57520SJan Höppner kl = 44; 32008fd57520SJan Höppner } 32018fd57520SJan Höppner 32028fd57520SJan Höppner /* Check blocksize */ 32038fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 32048fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 32058fd57520SJan Höppner goto out; 32068fd57520SJan Höppner } 32078fd57520SJan Höppner /* Check if key length is 0 */ 32088fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 32098fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 32108fd57520SJan Höppner goto out; 32118fd57520SJan Höppner } 32128fd57520SJan Höppner /* Check if record_id is correct */ 32138fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 32148fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 32158fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 32168fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 32178fd57520SJan Höppner goto out; 32188fd57520SJan Höppner } 32198fd57520SJan Höppner } 32208fd57520SJan Höppner } 32218fd57520SJan Höppner 32228fd57520SJan Höppner out: 32238fd57520SJan Höppner /* 32248fd57520SJan Höppner * In case of no errors, we need to decrease by one 32258fd57520SJan Höppner * to get the correct positions. 32268fd57520SJan Höppner */ 32278fd57520SJan Höppner if (!cdata->result) { 32288fd57520SJan Höppner i--; 32298fd57520SJan Höppner pos--; 32308fd57520SJan Höppner } 32318fd57520SJan Höppner 32328fd57520SJan Höppner cdata->unit = i; 32338fd57520SJan Höppner cdata->num_records = count; 32348fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 32358fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 32368fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 32378fd57520SJan Höppner } 32388fd57520SJan Höppner 32398fd57520SJan Höppner /* 32408fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 32418fd57520SJan Höppner */ 32428fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 32438fd57520SJan Höppner struct format_check_t *cdata, 32448fd57520SJan Höppner int enable_pav) 32458fd57520SJan Höppner { 32468fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 32478fd57520SJan Höppner struct eckd_count *fmt_buffer; 32488fd57520SJan Höppner struct irb irb; 32498fd57520SJan Höppner int rpt_max, rpt_exp; 32508fd57520SJan Höppner int fmt_buffer_size; 32518fd57520SJan Höppner int trk_per_cyl; 32528fd57520SJan Höppner int trkcount; 32538fd57520SJan Höppner int tpm = 0; 32548fd57520SJan Höppner int rc; 32558fd57520SJan Höppner 32568fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 32578fd57520SJan Höppner 32588fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 32598fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 32608fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 32618fd57520SJan Höppner 32628fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 32638fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 32648fd57520SJan Höppner 32658fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 32668fd57520SJan Höppner if (!fmt_buffer) 32678fd57520SJan Höppner return -ENOMEM; 32688fd57520SJan Höppner 32698fd57520SJan Höppner /* 32708fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 32718fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 32728fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 32738fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 32748fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 32758fd57520SJan Höppner * processed using command mode. 32768fd57520SJan Höppner */ 32778fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 32788fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 32798fd57520SJan Höppner tpm = 1; 32808fd57520SJan Höppner 32818fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 32828fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 32838fd57520SJan Höppner if (rc && rc != -EIO) 32848fd57520SJan Höppner goto out; 32858fd57520SJan Höppner if (rc == -EIO) { 32868fd57520SJan Höppner /* 32878fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 32888fd57520SJan Höppner * with an incorrect length error, we're going to retry the 32898fd57520SJan Höppner * check with command mode. 32908fd57520SJan Höppner */ 32918fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 32928fd57520SJan Höppner tpm = 0; 32938fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 32948fd57520SJan Höppner enable_pav, tpm, 32958fd57520SJan Höppner fmt_buffer, rpt_max, 32968fd57520SJan Höppner &irb); 32978fd57520SJan Höppner if (rc) 32988fd57520SJan Höppner goto out; 32998fd57520SJan Höppner } else { 33008fd57520SJan Höppner goto out; 33018fd57520SJan Höppner } 33028fd57520SJan Höppner } 33038fd57520SJan Höppner 33048fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 33058fd57520SJan Höppner trk_per_cyl, tpm); 33068fd57520SJan Höppner 33078fd57520SJan Höppner out: 33088fd57520SJan Höppner kfree(fmt_buffer); 33098fd57520SJan Höppner 33108fd57520SJan Höppner return rc; 3311570d237cSJan Höppner } 3312570d237cSJan Höppner 33138e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 33141da177e4SLinus Torvalds { 3315a2ace466SHannes Reinecke if (cqr->retries < 0) { 3316a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3317a2ace466SHannes Reinecke return; 3318a2ace466SHannes Reinecke } 33198e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 33208e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 33218e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 33228e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3323c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 33241da177e4SLinus Torvalds } 33258e09f215SStefan Weinhuber }; 33261da177e4SLinus Torvalds 33271da177e4SLinus Torvalds static dasd_erp_fn_t 33281da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 33291da177e4SLinus Torvalds { 33308e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 33311da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 33321da177e4SLinus Torvalds 33331da177e4SLinus Torvalds switch (cdev->id.cu_type) { 33341da177e4SLinus Torvalds case 0x3990: 33351da177e4SLinus Torvalds case 0x2105: 33361da177e4SLinus Torvalds case 0x2107: 33371da177e4SLinus Torvalds case 0x1750: 33381da177e4SLinus Torvalds return dasd_3990_erp_action; 33391da177e4SLinus Torvalds case 0x9343: 33401da177e4SLinus Torvalds case 0x3880: 33411da177e4SLinus Torvalds default: 33421da177e4SLinus Torvalds return dasd_default_erp_action; 33431da177e4SLinus Torvalds } 33441da177e4SLinus Torvalds } 33451da177e4SLinus Torvalds 33461da177e4SLinus Torvalds static dasd_erp_fn_t 33471da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 33481da177e4SLinus Torvalds { 33491da177e4SLinus Torvalds return dasd_default_erp_postaction; 33501da177e4SLinus Torvalds } 33511da177e4SLinus Torvalds 33525a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 33535a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 33548e09f215SStefan Weinhuber struct irb *irb) 33558e09f215SStefan Weinhuber { 33568e09f215SStefan Weinhuber char mask; 3357f3eb5384SStefan Weinhuber char *sense = NULL; 3358543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 33598e09f215SStefan Weinhuber 33608e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 33618e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3362f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3363c8d1c0ffSStefan Haberland /* 3364c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3365c8d1c0ffSStefan Haberland * and only if not suspended 3366c8d1c0ffSStefan Haberland */ 3367501183f2SStefan Haberland if (!device->block && private->lcu && 336825e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3369c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3370c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3371501183f2SStefan Haberland /* schedule worker to reload device */ 3372501183f2SStefan Haberland dasd_reload_device(device); 3373501183f2SStefan Haberland } 33748e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 33758e09f215SStefan Weinhuber return; 33768e09f215SStefan Weinhuber } 33778e09f215SStefan Weinhuber 3378a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 33795a27e60dSStefan Weinhuber if (!sense) 33805a27e60dSStefan Weinhuber return; 33815a27e60dSStefan Weinhuber 33825a27e60dSStefan Weinhuber /* summary unit check */ 3383c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3384a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 338559a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 338659a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 338759a9ed5fSStefan Haberland "eckd suc: device already notified"); 338859a9ed5fSStefan Haberland return; 338959a9ed5fSStefan Haberland } 339059a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 339159a9ed5fSStefan Haberland if (!sense) { 339259a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 339359a9ed5fSStefan Haberland "eckd suc: no reason code available"); 339459a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 339559a9ed5fSStefan Haberland return; 339659a9ed5fSStefan Haberland 339759a9ed5fSStefan Haberland } 339859a9ed5fSStefan Haberland private->suc_reason = sense[8]; 339959a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 340059a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 340159a9ed5fSStefan Haberland private->suc_reason); 340259a9ed5fSStefan Haberland dasd_get_device(device); 340359a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 340459a9ed5fSStefan Haberland dasd_put_device(device); 340559a9ed5fSStefan Haberland 34068e09f215SStefan Weinhuber return; 34078e09f215SStefan Weinhuber } 34088e09f215SStefan Weinhuber 3409f60c768cSStefan Haberland /* service information message SIM */ 34105a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3411f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3412f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3413f60c768cSStefan Haberland return; 3414f60c768cSStefan Haberland } 3415f60c768cSStefan Haberland 34165a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 34175a27e60dSStefan Weinhuber * as alias devices may be used with several bases 34185a27e60dSStefan Weinhuber */ 3419c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3420c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 34215a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 34225a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 34235a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 34245a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 34255a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34265a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 34275a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3428ada3df91SStefan Haberland } 34295a27e60dSStefan Weinhuber } 3430f3eb5384SStefan Weinhuber 343191dc4a19SJan Höppner static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, 343291dc4a19SJan Höppner unsigned int first_trk, 343391dc4a19SJan Höppner unsigned int last_trk) 343491dc4a19SJan Höppner { 343591dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 343691dc4a19SJan Höppner unsigned int trks_per_vol; 343791dc4a19SJan Höppner int rc = 0; 343891dc4a19SJan Höppner 343991dc4a19SJan Höppner trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; 344091dc4a19SJan Höppner 344191dc4a19SJan Höppner if (first_trk >= trks_per_vol) { 344291dc4a19SJan Höppner dev_warn(&device->cdev->dev, 344391dc4a19SJan Höppner "Start track number %u used in the space release command is too big\n", 344491dc4a19SJan Höppner first_trk); 344591dc4a19SJan Höppner rc = -EINVAL; 344691dc4a19SJan Höppner } else if (last_trk >= trks_per_vol) { 344791dc4a19SJan Höppner dev_warn(&device->cdev->dev, 344891dc4a19SJan Höppner "Stop track number %u used in the space release command is too big\n", 344991dc4a19SJan Höppner last_trk); 345091dc4a19SJan Höppner rc = -EINVAL; 345191dc4a19SJan Höppner } else if (first_trk > last_trk) { 345291dc4a19SJan Höppner dev_warn(&device->cdev->dev, 345391dc4a19SJan Höppner "Start track %u used in the space release command exceeds the end track\n", 345491dc4a19SJan Höppner first_trk); 345591dc4a19SJan Höppner rc = -EINVAL; 345691dc4a19SJan Höppner } 345791dc4a19SJan Höppner return rc; 345891dc4a19SJan Höppner } 345991dc4a19SJan Höppner 346091dc4a19SJan Höppner /* 346191dc4a19SJan Höppner * Helper function to count the amount of involved extents within a given range 346291dc4a19SJan Höppner * with extent alignment in mind. 346391dc4a19SJan Höppner */ 346491dc4a19SJan Höppner static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) 346591dc4a19SJan Höppner { 346691dc4a19SJan Höppner int cur_pos = 0; 346791dc4a19SJan Höppner int count = 0; 346891dc4a19SJan Höppner int tmp; 346991dc4a19SJan Höppner 347091dc4a19SJan Höppner if (from == to) 347191dc4a19SJan Höppner return 1; 347291dc4a19SJan Höppner 347391dc4a19SJan Höppner /* Count first partial extent */ 347491dc4a19SJan Höppner if (from % trks_per_ext != 0) { 347591dc4a19SJan Höppner tmp = from + trks_per_ext - (from % trks_per_ext) - 1; 347691dc4a19SJan Höppner if (tmp > to) 347791dc4a19SJan Höppner tmp = to; 347891dc4a19SJan Höppner cur_pos = tmp - from + 1; 347991dc4a19SJan Höppner count++; 348091dc4a19SJan Höppner } 348191dc4a19SJan Höppner /* Count full extents */ 348291dc4a19SJan Höppner if (to - (from + cur_pos) + 1 >= trks_per_ext) { 348391dc4a19SJan Höppner tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); 348491dc4a19SJan Höppner count += (tmp - (from + cur_pos) + 1) / trks_per_ext; 348591dc4a19SJan Höppner cur_pos = tmp; 348691dc4a19SJan Höppner } 348791dc4a19SJan Höppner /* Count last partial extent */ 348891dc4a19SJan Höppner if (cur_pos < to) 348991dc4a19SJan Höppner count++; 349091dc4a19SJan Höppner 349191dc4a19SJan Höppner return count; 349291dc4a19SJan Höppner } 349391dc4a19SJan Höppner 349491dc4a19SJan Höppner /* 349591dc4a19SJan Höppner * Release allocated space for a given range or an entire volume. 349691dc4a19SJan Höppner */ 349791dc4a19SJan Höppner static struct dasd_ccw_req * 349891dc4a19SJan Höppner dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, 349991dc4a19SJan Höppner struct request *req, unsigned int first_trk, 350091dc4a19SJan Höppner unsigned int last_trk, int by_extent) 350191dc4a19SJan Höppner { 350291dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 350391dc4a19SJan Höppner struct dasd_dso_ras_ext_range *ras_range; 350491dc4a19SJan Höppner struct dasd_rssd_features *features; 350591dc4a19SJan Höppner struct dasd_dso_ras_data *ras_data; 350691dc4a19SJan Höppner u16 heads, beg_head, end_head; 350791dc4a19SJan Höppner int cur_to_trk, cur_from_trk; 350891dc4a19SJan Höppner struct dasd_ccw_req *cqr; 350991dc4a19SJan Höppner u32 beg_cyl, end_cyl; 351091dc4a19SJan Höppner struct ccw1 *ccw; 351191dc4a19SJan Höppner int trks_per_ext; 351291dc4a19SJan Höppner size_t ras_size; 351391dc4a19SJan Höppner size_t size; 351491dc4a19SJan Höppner int nr_exts; 351591dc4a19SJan Höppner void *rq; 351691dc4a19SJan Höppner int i; 351791dc4a19SJan Höppner 351891dc4a19SJan Höppner if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) 351991dc4a19SJan Höppner return ERR_PTR(-EINVAL); 352091dc4a19SJan Höppner 352191dc4a19SJan Höppner rq = req ? blk_mq_rq_to_pdu(req) : NULL; 352291dc4a19SJan Höppner 352391dc4a19SJan Höppner features = &private->features; 352491dc4a19SJan Höppner 352591dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 352691dc4a19SJan Höppner nr_exts = 0; 352791dc4a19SJan Höppner if (by_extent) 352891dc4a19SJan Höppner nr_exts = count_exts(first_trk, last_trk, trks_per_ext); 352991dc4a19SJan Höppner ras_size = sizeof(*ras_data); 353091dc4a19SJan Höppner size = ras_size + (nr_exts * sizeof(*ras_range)); 353191dc4a19SJan Höppner 353291dc4a19SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); 353391dc4a19SJan Höppner if (IS_ERR(cqr)) { 353491dc4a19SJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 353591dc4a19SJan Höppner "Could not allocate RAS request"); 353691dc4a19SJan Höppner return cqr; 353791dc4a19SJan Höppner } 353891dc4a19SJan Höppner 353991dc4a19SJan Höppner ras_data = cqr->data; 354091dc4a19SJan Höppner memset(ras_data, 0, size); 354191dc4a19SJan Höppner 354291dc4a19SJan Höppner ras_data->order = DSO_ORDER_RAS; 354391dc4a19SJan Höppner ras_data->flags.vol_type = 0; /* CKD volume */ 354491dc4a19SJan Höppner /* Release specified extents or entire volume */ 354591dc4a19SJan Höppner ras_data->op_flags.by_extent = by_extent; 354691dc4a19SJan Höppner /* 354791dc4a19SJan Höppner * This bit guarantees initialisation of tracks within an extent that is 354891dc4a19SJan Höppner * not fully specified, but is only supported with a certain feature 354991dc4a19SJan Höppner * subset. 355091dc4a19SJan Höppner */ 355191dc4a19SJan Höppner ras_data->op_flags.guarantee_init = !!(features->feature[56] & 0x01); 355291dc4a19SJan Höppner ras_data->lss = private->ned->ID; 355391dc4a19SJan Höppner ras_data->dev_addr = private->ned->unit_addr; 355491dc4a19SJan Höppner ras_data->nr_exts = nr_exts; 355591dc4a19SJan Höppner 355691dc4a19SJan Höppner if (by_extent) { 355791dc4a19SJan Höppner heads = private->rdc_data.trk_per_cyl; 355891dc4a19SJan Höppner cur_from_trk = first_trk; 355991dc4a19SJan Höppner cur_to_trk = first_trk + trks_per_ext - 356091dc4a19SJan Höppner (first_trk % trks_per_ext) - 1; 356191dc4a19SJan Höppner if (cur_to_trk > last_trk) 356291dc4a19SJan Höppner cur_to_trk = last_trk; 356391dc4a19SJan Höppner ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); 356491dc4a19SJan Höppner 356591dc4a19SJan Höppner for (i = 0; i < nr_exts; i++) { 356691dc4a19SJan Höppner beg_cyl = cur_from_trk / heads; 356791dc4a19SJan Höppner beg_head = cur_from_trk % heads; 356891dc4a19SJan Höppner end_cyl = cur_to_trk / heads; 356991dc4a19SJan Höppner end_head = cur_to_trk % heads; 357091dc4a19SJan Höppner 357191dc4a19SJan Höppner set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); 357291dc4a19SJan Höppner set_ch_t(&ras_range->end_ext, end_cyl, end_head); 357391dc4a19SJan Höppner 357491dc4a19SJan Höppner cur_from_trk = cur_to_trk + 1; 357591dc4a19SJan Höppner cur_to_trk = cur_from_trk + trks_per_ext - 1; 357691dc4a19SJan Höppner if (cur_to_trk > last_trk) 357791dc4a19SJan Höppner cur_to_trk = last_trk; 357891dc4a19SJan Höppner ras_range++; 357991dc4a19SJan Höppner } 358091dc4a19SJan Höppner } 358191dc4a19SJan Höppner 358291dc4a19SJan Höppner ccw = cqr->cpaddr; 358391dc4a19SJan Höppner ccw->cda = (__u32)(addr_t)cqr->data; 358491dc4a19SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_DSO; 358591dc4a19SJan Höppner ccw->count = size; 358691dc4a19SJan Höppner 358791dc4a19SJan Höppner cqr->startdev = device; 358891dc4a19SJan Höppner cqr->memdev = device; 358991dc4a19SJan Höppner cqr->block = block; 359091dc4a19SJan Höppner cqr->retries = 256; 359191dc4a19SJan Höppner cqr->expires = device->default_expires * HZ; 359291dc4a19SJan Höppner cqr->buildclk = get_tod_clock(); 359391dc4a19SJan Höppner cqr->status = DASD_CQR_FILLED; 359491dc4a19SJan Höppner 359591dc4a19SJan Höppner return cqr; 359691dc4a19SJan Höppner } 359791dc4a19SJan Höppner 359891dc4a19SJan Höppner static int dasd_eckd_release_space_full(struct dasd_device *device) 359991dc4a19SJan Höppner { 360091dc4a19SJan Höppner struct dasd_ccw_req *cqr; 360191dc4a19SJan Höppner int rc; 360291dc4a19SJan Höppner 360391dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); 360491dc4a19SJan Höppner if (IS_ERR(cqr)) 360591dc4a19SJan Höppner return PTR_ERR(cqr); 360691dc4a19SJan Höppner 360791dc4a19SJan Höppner rc = dasd_sleep_on_interruptible(cqr); 360891dc4a19SJan Höppner 360991dc4a19SJan Höppner dasd_sfree_request(cqr, cqr->memdev); 361091dc4a19SJan Höppner 361191dc4a19SJan Höppner return rc; 361291dc4a19SJan Höppner } 361391dc4a19SJan Höppner 361491dc4a19SJan Höppner static int dasd_eckd_release_space_trks(struct dasd_device *device, 361591dc4a19SJan Höppner unsigned int from, unsigned int to) 361691dc4a19SJan Höppner { 361791dc4a19SJan Höppner struct dasd_eckd_private *private = device->private; 361891dc4a19SJan Höppner struct dasd_block *block = device->block; 361991dc4a19SJan Höppner struct dasd_ccw_req *cqr, *n; 362091dc4a19SJan Höppner struct list_head ras_queue; 362191dc4a19SJan Höppner unsigned int device_exts; 362291dc4a19SJan Höppner int trks_per_ext; 362391dc4a19SJan Höppner int stop, step; 362491dc4a19SJan Höppner int cur_pos; 362591dc4a19SJan Höppner int rc = 0; 362691dc4a19SJan Höppner int retry; 362791dc4a19SJan Höppner 362891dc4a19SJan Höppner INIT_LIST_HEAD(&ras_queue); 362991dc4a19SJan Höppner 363091dc4a19SJan Höppner device_exts = private->real_cyl / dasd_eckd_ext_size(device); 363191dc4a19SJan Höppner trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; 363291dc4a19SJan Höppner 363391dc4a19SJan Höppner /* Make sure device limits are not exceeded */ 363491dc4a19SJan Höppner step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); 363591dc4a19SJan Höppner cur_pos = from; 363691dc4a19SJan Höppner 363791dc4a19SJan Höppner do { 363891dc4a19SJan Höppner retry = 0; 363991dc4a19SJan Höppner while (cur_pos < to) { 364091dc4a19SJan Höppner stop = cur_pos + step - 364191dc4a19SJan Höppner ((cur_pos + step) % trks_per_ext) - 1; 364291dc4a19SJan Höppner if (stop > to) 364391dc4a19SJan Höppner stop = to; 364491dc4a19SJan Höppner 364591dc4a19SJan Höppner cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); 364691dc4a19SJan Höppner if (IS_ERR(cqr)) { 364791dc4a19SJan Höppner rc = PTR_ERR(cqr); 364891dc4a19SJan Höppner if (rc == -ENOMEM) { 364991dc4a19SJan Höppner if (list_empty(&ras_queue)) 365091dc4a19SJan Höppner goto out; 365191dc4a19SJan Höppner retry = 1; 365291dc4a19SJan Höppner break; 365391dc4a19SJan Höppner } 365491dc4a19SJan Höppner goto err_out; 365591dc4a19SJan Höppner } 365691dc4a19SJan Höppner 365791dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 365891dc4a19SJan Höppner list_add_tail(&cqr->blocklist, &ras_queue); 365991dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 366091dc4a19SJan Höppner cur_pos = stop + 1; 366191dc4a19SJan Höppner } 366291dc4a19SJan Höppner 366391dc4a19SJan Höppner rc = dasd_sleep_on_queue_interruptible(&ras_queue); 366491dc4a19SJan Höppner 366591dc4a19SJan Höppner err_out: 366691dc4a19SJan Höppner list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { 366791dc4a19SJan Höppner device = cqr->startdev; 366891dc4a19SJan Höppner private = device->private; 366991dc4a19SJan Höppner 367091dc4a19SJan Höppner spin_lock_irq(&block->queue_lock); 367191dc4a19SJan Höppner list_del_init(&cqr->blocklist); 367291dc4a19SJan Höppner spin_unlock_irq(&block->queue_lock); 367391dc4a19SJan Höppner dasd_sfree_request(cqr, device); 367491dc4a19SJan Höppner private->count--; 367591dc4a19SJan Höppner } 367691dc4a19SJan Höppner } while (retry); 367791dc4a19SJan Höppner 367891dc4a19SJan Höppner out: 367991dc4a19SJan Höppner return rc; 368091dc4a19SJan Höppner } 368191dc4a19SJan Höppner 368291dc4a19SJan Höppner static int dasd_eckd_release_space(struct dasd_device *device, 368391dc4a19SJan Höppner struct format_data_t *rdata) 368491dc4a19SJan Höppner { 368591dc4a19SJan Höppner if (rdata->intensity & DASD_FMT_INT_ESE_FULL) 368691dc4a19SJan Höppner return dasd_eckd_release_space_full(device); 368791dc4a19SJan Höppner else if (rdata->intensity == 0) 368891dc4a19SJan Höppner return dasd_eckd_release_space_trks(device, rdata->start_unit, 368991dc4a19SJan Höppner rdata->stop_unit); 369091dc4a19SJan Höppner else 369191dc4a19SJan Höppner return -EINVAL; 369291dc4a19SJan Höppner } 369391dc4a19SJan Höppner 36947e64db15SJan Höppner static struct dasd_ccw_req * 36957e64db15SJan Höppner dasd_eckd_build_cp_discard(struct dasd_device *device, struct dasd_block *block, 36967e64db15SJan Höppner struct request *req, sector_t first_trk, 36977e64db15SJan Höppner sector_t last_trk) 36987e64db15SJan Höppner { 36997e64db15SJan Höppner return dasd_eckd_dso_ras(device, block, req, first_trk, last_trk, 1); 37007e64db15SJan Höppner } 37017e64db15SJan Höppner 3702f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3703f3eb5384SStefan Weinhuber struct dasd_device *startdev, 37048e09f215SStefan Weinhuber struct dasd_block *block, 3705f3eb5384SStefan Weinhuber struct request *req, 3706f3eb5384SStefan Weinhuber sector_t first_rec, 3707f3eb5384SStefan Weinhuber sector_t last_rec, 3708f3eb5384SStefan Weinhuber sector_t first_trk, 3709f3eb5384SStefan Weinhuber sector_t last_trk, 3710f3eb5384SStefan Weinhuber unsigned int first_offs, 3711f3eb5384SStefan Weinhuber unsigned int last_offs, 3712f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3713f3eb5384SStefan Weinhuber unsigned int blksize) 37141da177e4SLinus Torvalds { 37151da177e4SLinus Torvalds struct dasd_eckd_private *private; 37161da177e4SLinus Torvalds unsigned long *idaws; 37171da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 37181da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37191da177e4SLinus Torvalds struct ccw1 *ccw; 37205705f702SNeilBrown struct req_iterator iter; 37217988613bSKent Overstreet struct bio_vec bv; 37221da177e4SLinus Torvalds char *dst; 3723f3eb5384SStefan Weinhuber unsigned int off; 37241da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3725f3eb5384SStefan Weinhuber sector_t recid; 37261da177e4SLinus Torvalds unsigned char cmd, rcmd; 37278e09f215SStefan Weinhuber int use_prefix; 37288e09f215SStefan Weinhuber struct dasd_device *basedev; 37291da177e4SLinus Torvalds 37308e09f215SStefan Weinhuber basedev = block->base; 3731543691a4SSebastian Ott private = basedev->private; 37321da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 37331da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 37341da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 37351da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 37361da177e4SLinus Torvalds else 37371da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3738f3eb5384SStefan Weinhuber 37391da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 37401da177e4SLinus Torvalds count = 0; 37411da177e4SLinus Torvalds cidaw = 0; 37425705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 37437988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 37441da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 37451da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 37467988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 37477988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 37487988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 37491da177e4SLinus Torvalds } 37501da177e4SLinus Torvalds /* Paranoia. */ 37511da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 37521da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 37538e09f215SStefan Weinhuber 37548e09f215SStefan Weinhuber /* use the prefix command if available */ 37558e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 37568e09f215SStefan Weinhuber if (use_prefix) { 37578e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 37588e09f215SStefan Weinhuber cplength = 2 + count; 37598e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 37608e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 37618e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 37628e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 37638e09f215SStefan Weinhuber } else { 37641da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 37651da177e4SLinus Torvalds cplength = 2 + count; 37661da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 37678e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 37688e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 37691da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 37708e09f215SStefan Weinhuber } 37711da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 37721da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 37731da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 37741da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 37751da177e4SLinus Torvalds cplength += count; 37761da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 37771da177e4SLinus Torvalds } 37781da177e4SLinus Torvalds /* Allocate the ccw request. */ 377968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3780c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 37811da177e4SLinus Torvalds if (IS_ERR(cqr)) 37821da177e4SLinus Torvalds return cqr; 37831da177e4SLinus Torvalds ccw = cqr->cpaddr; 37848e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 37858e09f215SStefan Weinhuber if (use_prefix) { 37868e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 37878e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 37888e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 37898e09f215SStefan Weinhuber * Try again later. 37908e09f215SStefan Weinhuber */ 37918e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3792d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3793d54853efSMartin Schwidefsky } 37948e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 37958e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 37968e09f215SStefan Weinhuber } else { 37978e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 379845f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 37998e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 38008e09f215SStefan Weinhuber * Try again later. 38018e09f215SStefan Weinhuber */ 38028e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 38038e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 38048e09f215SStefan Weinhuber } 38058e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 38068e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 38078e09f215SStefan Weinhuber } 38081da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 38091da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 38101da177e4SLinus Torvalds recid = first_rec; 38111da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 38121da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 38131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 38141da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 38158e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 38161da177e4SLinus Torvalds } 38175705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 38187988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 38191da177e4SLinus Torvalds if (dasd_page_cache) { 38201da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3821441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 38221da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 38237988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 38241da177e4SLinus Torvalds if (copy) 38257988613bSKent Overstreet dst = copy + bv.bv_offset; 38261da177e4SLinus Torvalds } 38277988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 38281da177e4SLinus Torvalds sector_t trkid = recid; 38291da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 38301da177e4SLinus Torvalds rcmd = cmd; 38311da177e4SLinus Torvalds count = blksize; 38321da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 38331da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 38341da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 38351da177e4SLinus Torvalds rcmd |= 0x8; 38361da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3837ec5883abSHorst Hummel if (count < blksize && 3838ec5883abSHorst Hummel rq_data_dir(req) == READ) 38391da177e4SLinus Torvalds memset(dst + count, 0xe5, 38401da177e4SLinus Torvalds blksize - count); 38411da177e4SLinus Torvalds } 38421da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 38431da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 38441da177e4SLinus Torvalds trkid, recoffs + 1, 38458e09f215SStefan Weinhuber 1, rcmd, basedev, count); 38461da177e4SLinus Torvalds } 38471da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 38481da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 38491da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 38501da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 38511da177e4SLinus Torvalds trkid, recoffs + 1, 38521da177e4SLinus Torvalds last_rec - recid + 1, 38538e09f215SStefan Weinhuber cmd, basedev, count); 38541da177e4SLinus Torvalds } 38551da177e4SLinus Torvalds /* Read/write ccw. */ 38561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 38571da177e4SLinus Torvalds ccw->cmd_code = rcmd; 38581da177e4SLinus Torvalds ccw->count = count; 38591da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 38601da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 38611da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 38621da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 38631da177e4SLinus Torvalds } else { 38641da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 38651da177e4SLinus Torvalds ccw->flags = 0; 38661da177e4SLinus Torvalds } 38671da177e4SLinus Torvalds ccw++; 38681da177e4SLinus Torvalds dst += blksize; 38691da177e4SLinus Torvalds recid++; 38701da177e4SLinus Torvalds } 38711da177e4SLinus Torvalds } 387213de227bSHolger Smolinski if (blk_noretry_request(req) || 387313de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 38741c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 38758e09f215SStefan Weinhuber cqr->startdev = startdev; 38768e09f215SStefan Weinhuber cqr->memdev = startdev; 38778e09f215SStefan Weinhuber cqr->block = block; 38787c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3879c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 38801f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 38811aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 38821da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 38835e2b17e7SJan Höppner 38845e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 38855e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 38865e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 38875e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 38885e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 38895e2b17e7SJan Höppner } 38905e2b17e7SJan Höppner 38911da177e4SLinus Torvalds return cqr; 38921da177e4SLinus Torvalds } 38931da177e4SLinus Torvalds 3894f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3895f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3896f3eb5384SStefan Weinhuber struct dasd_block *block, 3897f3eb5384SStefan Weinhuber struct request *req, 3898f3eb5384SStefan Weinhuber sector_t first_rec, 3899f3eb5384SStefan Weinhuber sector_t last_rec, 3900f3eb5384SStefan Weinhuber sector_t first_trk, 3901f3eb5384SStefan Weinhuber sector_t last_trk, 3902f3eb5384SStefan Weinhuber unsigned int first_offs, 3903f3eb5384SStefan Weinhuber unsigned int last_offs, 3904f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3905f3eb5384SStefan Weinhuber unsigned int blksize) 3906f3eb5384SStefan Weinhuber { 3907f3eb5384SStefan Weinhuber unsigned long *idaws; 3908f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3909f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3910f3eb5384SStefan Weinhuber struct req_iterator iter; 39117988613bSKent Overstreet struct bio_vec bv; 3912f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3913f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3914f3eb5384SStefan Weinhuber unsigned int tlf; 3915f3eb5384SStefan Weinhuber sector_t recid; 3916f3eb5384SStefan Weinhuber unsigned char cmd; 3917f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3918f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3919f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3920f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3921f3eb5384SStefan Weinhuber sector_t trkid; 3922f3eb5384SStefan Weinhuber unsigned int recoffs; 3923f3eb5384SStefan Weinhuber 3924f3eb5384SStefan Weinhuber basedev = block->base; 3925f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3926f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3927f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3928f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3929f3eb5384SStefan Weinhuber else 3930f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3931f3eb5384SStefan Weinhuber 3932f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3933f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3934f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3935f3eb5384SStefan Weinhuber * of records as upper limit. 3936f3eb5384SStefan Weinhuber */ 3937f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3938f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3939f3eb5384SStefan Weinhuber 3940f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3941f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3942f3eb5384SStefan Weinhuber 39437bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 3944f3eb5384SStefan Weinhuber 3945f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 394668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3947c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 3948f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3949f3eb5384SStefan Weinhuber return cqr; 3950f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3951f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3952f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3953f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3954f3eb5384SStefan Weinhuber else 3955f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3956f3eb5384SStefan Weinhuber tlf *= blksize; 3957f3eb5384SStefan Weinhuber 3958f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3959f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3960f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3961f3eb5384SStefan Weinhuber trkcount, blksize, 3962f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3963f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3964f3eb5384SStefan Weinhuber * Try again later. 3965f3eb5384SStefan Weinhuber */ 3966f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3967f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3968f3eb5384SStefan Weinhuber } 3969f3eb5384SStefan Weinhuber 3970f3eb5384SStefan Weinhuber /* 3971f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3972f3eb5384SStefan Weinhuber * following conditions: 3973f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3974f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3975f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3976f3eb5384SStefan Weinhuber */ 3977f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3978f3eb5384SStefan Weinhuber recid = first_rec; 3979f3eb5384SStefan Weinhuber new_track = 1; 3980f3eb5384SStefan Weinhuber end_idaw = 0; 3981f3eb5384SStefan Weinhuber len_to_track_end = 0; 3982246ccea1SMartin Schwidefsky idaw_dst = NULL; 3983f3eb5384SStefan Weinhuber idaw_len = 0; 3984f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 39857988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39867988613bSKent Overstreet seg_len = bv.bv_len; 3987f3eb5384SStefan Weinhuber while (seg_len) { 3988f3eb5384SStefan Weinhuber if (new_track) { 3989f3eb5384SStefan Weinhuber trkid = recid; 3990f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3991f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3992f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3993f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3994f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3995f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3996f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3997f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3998f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3999f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 4000f3eb5384SStefan Weinhuber ccw++; 4001f3eb5384SStefan Weinhuber recid += count; 4002f3eb5384SStefan Weinhuber new_track = 0; 400352db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 400452db45c3SStefan Weinhuber if (!idaw_dst) 400552db45c3SStefan Weinhuber idaw_dst = dst; 4006f3eb5384SStefan Weinhuber } 400752db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 400852db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 4009f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 4010f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 4011f3eb5384SStefan Weinhuber * idaw ends 4012f3eb5384SStefan Weinhuber */ 401352db45c3SStefan Weinhuber if (!idaw_dst) { 401452db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 401552db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 401652db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 401752db45c3SStefan Weinhuber } else 4018f3eb5384SStefan Weinhuber idaw_dst = dst; 401952db45c3SStefan Weinhuber } 4020f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 4021f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 4022f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 4023f3eb5384SStefan Weinhuber } 4024f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4025f3eb5384SStefan Weinhuber seg_len -= part_len; 4026f3eb5384SStefan Weinhuber dst += part_len; 4027f3eb5384SStefan Weinhuber idaw_len += part_len; 4028f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 4029f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 4030f3eb5384SStefan Weinhuber * -> create an idaw 4031f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 4032f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 4033f3eb5384SStefan Weinhuber */ 4034f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 4035f3eb5384SStefan Weinhuber end_idaw = 1; 4036f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 4037f3eb5384SStefan Weinhuber if (!len_to_track_end) { 4038f3eb5384SStefan Weinhuber new_track = 1; 4039f3eb5384SStefan Weinhuber end_idaw = 1; 4040f3eb5384SStefan Weinhuber } 4041f3eb5384SStefan Weinhuber if (end_idaw) { 4042f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 4043f3eb5384SStefan Weinhuber idaw_len); 4044246ccea1SMartin Schwidefsky idaw_dst = NULL; 4045f3eb5384SStefan Weinhuber idaw_len = 0; 4046f3eb5384SStefan Weinhuber end_idaw = 0; 4047f3eb5384SStefan Weinhuber } 4048f3eb5384SStefan Weinhuber } 4049f3eb5384SStefan Weinhuber } 4050f3eb5384SStefan Weinhuber 4051f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4052f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4053f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4054f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4055f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4056f3eb5384SStefan Weinhuber cqr->block = block; 40577c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4058c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 40591f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 40601aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4061f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 40625e2b17e7SJan Höppner 40635e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 40645e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 40655e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 40665e2b17e7SJan Höppner 4067f3eb5384SStefan Weinhuber return cqr; 4068f3eb5384SStefan Weinhuber } 4069f3eb5384SStefan Weinhuber 4070f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 4071f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 4072f3eb5384SStefan Weinhuber struct dasd_device *basedev, 4073f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4074f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 4075f3eb5384SStefan Weinhuber unsigned int blksize, 4076f3eb5384SStefan Weinhuber unsigned int total_data_size, 4077f3eb5384SStefan Weinhuber unsigned int tlf, 4078f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 4079f3eb5384SStefan Weinhuber { 4080f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 4081f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 4082f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 4083f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 4084f3eb5384SStefan Weinhuber struct dcw *dcw; 4085f3eb5384SStefan Weinhuber 4086f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 4087f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 4088f3eb5384SStefan Weinhuber u8 pfx_cmd; 4089f3eb5384SStefan Weinhuber 4090f3eb5384SStefan Weinhuber int rc = 0; 4091f3eb5384SStefan Weinhuber int sector = 0; 4092f3eb5384SStefan Weinhuber int dn, d; 4093f3eb5384SStefan Weinhuber 4094f3eb5384SStefan Weinhuber 4095f3eb5384SStefan Weinhuber /* setup prefix data */ 4096543691a4SSebastian Ott basepriv = basedev->private; 4097543691a4SSebastian Ott startpriv = startdev->private; 4098f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 4099f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 4100f3eb5384SStefan Weinhuber 4101f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 4102f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 4103f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 4104f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 4105f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 4106f3eb5384SStefan Weinhuber 4107f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4108da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 4109f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 4110da340f92SStefan Haberland 4111da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 4112da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 4113f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 4114f3eb5384SStefan Weinhuber } 4115f3eb5384SStefan Weinhuber 4116f3eb5384SStefan Weinhuber switch (cmd) { 4117f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 4118f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 4119f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4120f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4121f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4122f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4123f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 4124f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 4125f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 4126f3eb5384SStefan Weinhuber break; 4127f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 4128f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 4129f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4130f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 41315628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 4132f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 4133f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 4134f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 4135f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 4136f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 413745f186beSJan Höppner /* 413845f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 413945f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 414045f186beSJan Höppner * data as well. 414145f186beSJan Höppner */ 414245f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 414345f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 4144f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 4145f3eb5384SStefan Weinhuber break; 41468fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 41478fd57520SJan Höppner dedata->mask.perm = 0x1; 41488fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 41498fd57520SJan Höppner dedata->ga_extended |= 0x42; 41508fd57520SJan Höppner dedata->blk_size = blksize; 41518fd57520SJan Höppner lredata->operation.orientation = 0x2; 41528fd57520SJan Höppner lredata->operation.operation = 0x16; 41538fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 41548fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 41558fd57520SJan Höppner break; 4156f3eb5384SStefan Weinhuber default: 4157f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4158f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 4159f3eb5384SStefan Weinhuber BUG(); 4160f3eb5384SStefan Weinhuber break; 4161f3eb5384SStefan Weinhuber } 4162f3eb5384SStefan Weinhuber if (rc) 4163f3eb5384SStefan Weinhuber return rc; 4164f3eb5384SStefan Weinhuber 4165f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 4166f3eb5384SStefan Weinhuber 4167f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 4168f3eb5384SStefan Weinhuber begcyl = trk / heads; 4169f3eb5384SStefan Weinhuber beghead = trk % heads; 4170f3eb5384SStefan Weinhuber endcyl = totrk / heads; 4171f3eb5384SStefan Weinhuber endhead = totrk % heads; 4172f3eb5384SStefan Weinhuber 4173f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 4174f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 4175f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 4176f3eb5384SStefan Weinhuber 4177f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 4178f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 4179f3eb5384SStefan Weinhuber else 4180f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 4181f3eb5384SStefan Weinhuber } 4182f3eb5384SStefan Weinhuber 4183f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 4184f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 4185f3eb5384SStefan Weinhuber 4186f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 4187f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 4188f3eb5384SStefan Weinhuber 4189f3eb5384SStefan Weinhuber if (rec_on_trk) { 4190f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 4191f3eb5384SStefan Weinhuber case 0x3390: 4192f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 4193f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 4194f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4195f3eb5384SStefan Weinhuber break; 4196f3eb5384SStefan Weinhuber case 0x3380: 4197f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 4198f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4199f3eb5384SStefan Weinhuber break; 4200f3eb5384SStefan Weinhuber } 4201f3eb5384SStefan Weinhuber } 4202f3eb5384SStefan Weinhuber 42038fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 42048fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 42058fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 42068fd57520SJan Höppner lredata->sector = 0xff; 42078fd57520SJan Höppner } else { 4208f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 4209f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 42108fd57520SJan Höppner lredata->sector = sector; 42118fd57520SJan Höppner } 4212f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 4213f3eb5384SStefan Weinhuber lredata->length = tlf; 4214f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 4215f3eb5384SStefan Weinhuber lredata->count = count; 4216f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 4217f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 4218f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 4219f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 4220f3eb5384SStefan Weinhuber 4221f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 4222f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 4223757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 4224f3eb5384SStefan Weinhuber } 4225f3eb5384SStefan Weinhuber 4226f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 4227f3eb5384SStefan Weinhuber struct dasd_device *startdev, 4228f3eb5384SStefan Weinhuber struct dasd_block *block, 4229f3eb5384SStefan Weinhuber struct request *req, 4230f3eb5384SStefan Weinhuber sector_t first_rec, 4231f3eb5384SStefan Weinhuber sector_t last_rec, 4232f3eb5384SStefan Weinhuber sector_t first_trk, 4233f3eb5384SStefan Weinhuber sector_t last_trk, 4234f3eb5384SStefan Weinhuber unsigned int first_offs, 4235f3eb5384SStefan Weinhuber unsigned int last_offs, 4236f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 4237f3eb5384SStefan Weinhuber unsigned int blksize) 4238f3eb5384SStefan Weinhuber { 4239f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4240f3eb5384SStefan Weinhuber struct req_iterator iter; 42417988613bSKent Overstreet struct bio_vec bv; 4242f3eb5384SStefan Weinhuber char *dst; 4243f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 4244f3eb5384SStefan Weinhuber unsigned char cmd; 4245f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4246f3eb5384SStefan Weinhuber unsigned int tlf; 4247f3eb5384SStefan Weinhuber struct itcw *itcw; 4248f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 4249f3eb5384SStefan Weinhuber int itcw_op; 4250f3eb5384SStefan Weinhuber size_t itcw_size; 4251ef19298bSStefan Weinhuber u8 tidaw_flags; 4252ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 4253ef19298bSStefan Weinhuber unsigned char new_track; 4254ef19298bSStefan Weinhuber sector_t recid, trkid; 4255ef19298bSStefan Weinhuber unsigned int offs; 4256ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 4257cd10502bSJulia Lawall int ret; 4258f3eb5384SStefan Weinhuber 4259f3eb5384SStefan Weinhuber basedev = block->base; 4260f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 4261f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 4262f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 4263f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 4264f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 4265f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 4266f3eb5384SStefan Weinhuber } else 4267f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 4268f3eb5384SStefan Weinhuber 4269f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 4270f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 4271f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 4272ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 4273ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 4274f3eb5384SStefan Weinhuber */ 4275f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 4276f3eb5384SStefan Weinhuber ctidaw = 0; 4277f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 4278f3eb5384SStefan Weinhuber ++ctidaw; 4279f3eb5384SStefan Weinhuber } 4280ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4281ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 4282f3eb5384SStefan Weinhuber 4283f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 4284f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 4285c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 4286c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4287f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 4288f3eb5384SStefan Weinhuber return cqr; 4289f3eb5384SStefan Weinhuber 4290f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 4291f3eb5384SStefan Weinhuber if (first_trk == last_trk) 4292f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 4293f3eb5384SStefan Weinhuber else 4294f3eb5384SStefan Weinhuber tlf = last_offs + 1; 4295f3eb5384SStefan Weinhuber tlf *= blksize; 4296f3eb5384SStefan Weinhuber 4297f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 4298ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 4299cd10502bSJulia Lawall ret = -EINVAL; 4300cd10502bSJulia Lawall goto out_error; 4301ef19298bSStefan Weinhuber } 4302f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 4303f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 4304f3eb5384SStefan Weinhuber cmd, basedev, startdev, 4305f3eb5384SStefan Weinhuber first_offs + 1, 4306f3eb5384SStefan Weinhuber trkcount, blksize, 4307f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 4308f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 4309f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 4310f3eb5384SStefan Weinhuber * Try again later. 4311f3eb5384SStefan Weinhuber */ 4312cd10502bSJulia Lawall ret = -EAGAIN; 4313cd10502bSJulia Lawall goto out_error; 4314f3eb5384SStefan Weinhuber } 4315d54cddb6SHeiko Carstens len_to_track_end = 0; 4316f3eb5384SStefan Weinhuber /* 4317f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 4318f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 4319f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 4320f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 4321ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 4322ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 4323f3eb5384SStefan Weinhuber */ 4324ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 4325ef19298bSStefan Weinhuber new_track = 1; 4326ef19298bSStefan Weinhuber recid = first_rec; 4327f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 43287988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 43297988613bSKent Overstreet seg_len = bv.bv_len; 4330ef19298bSStefan Weinhuber while (seg_len) { 4331ef19298bSStefan Weinhuber if (new_track) { 4332ef19298bSStefan Weinhuber trkid = recid; 4333ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 4334ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 4335ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 4336ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 4337ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 4338ef19298bSStefan Weinhuber recid += count; 4339ef19298bSStefan Weinhuber new_track = 0; 4340f3eb5384SStefan Weinhuber } 4341ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 4342ef19298bSStefan Weinhuber seg_len -= part_len; 4343ef19298bSStefan Weinhuber len_to_track_end -= part_len; 4344ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4345ef19298bSStefan Weinhuber if (!len_to_track_end) { 4346ef19298bSStefan Weinhuber new_track = 1; 4347ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4348ef19298bSStefan Weinhuber } else 4349ef19298bSStefan Weinhuber tidaw_flags = 0; 4350ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4351ef19298bSStefan Weinhuber dst, part_len); 4352cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4353cd10502bSJulia Lawall ret = -EINVAL; 4354cd10502bSJulia Lawall goto out_error; 4355cd10502bSJulia Lawall } 4356ef19298bSStefan Weinhuber dst += part_len; 4357ef19298bSStefan Weinhuber } 4358ef19298bSStefan Weinhuber } 4359ef19298bSStefan Weinhuber } else { 4360ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 43617988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 4362ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 43637988613bSKent Overstreet dst, bv.bv_len); 4364cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4365cd10502bSJulia Lawall ret = -EINVAL; 4366cd10502bSJulia Lawall goto out_error; 4367cd10502bSJulia Lawall } 4368ef19298bSStefan Weinhuber } 4369ef19298bSStefan Weinhuber } 4370ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4371ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4372f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4373f3eb5384SStefan Weinhuber 4374f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4375f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4376f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4377ef19298bSStefan Weinhuber cqr->cpmode = 1; 4378f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4379f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4380f3eb5384SStefan Weinhuber cqr->block = block; 43817c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4382c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 43831f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 43841aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4385f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 43865e2b17e7SJan Höppner 43875e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 43885e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 43895e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 43905e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 43915e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 43925e2b17e7SJan Höppner } 43935e2b17e7SJan Höppner 4394f3eb5384SStefan Weinhuber return cqr; 4395cd10502bSJulia Lawall out_error: 4396cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4397cd10502bSJulia Lawall return ERR_PTR(ret); 4398f3eb5384SStefan Weinhuber } 4399f3eb5384SStefan Weinhuber 4400f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4401f3eb5384SStefan Weinhuber struct dasd_block *block, 4402f3eb5384SStefan Weinhuber struct request *req) 4403f3eb5384SStefan Weinhuber { 4404ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4405f3eb5384SStefan Weinhuber int use_prefix; 4406ef19298bSStefan Weinhuber int fcx_multitrack; 440745b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4408f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4409f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4410f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4411f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4412f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4413f3eb5384SStefan Weinhuber int cdlspecial; 4414ef19298bSStefan Weinhuber unsigned int data_size; 4415f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4416f3eb5384SStefan Weinhuber 4417f3eb5384SStefan Weinhuber basedev = block->base; 4418543691a4SSebastian Ott private = basedev->private; 4419f3eb5384SStefan Weinhuber 4420f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4421f3eb5384SStefan Weinhuber blksize = block->bp_block; 4422f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 44236fca97a9SStefan Haberland if (blk_per_trk == 0) 44246fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4425f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 442683096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4427f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4428f3eb5384SStefan Weinhuber last_rec = last_trk = 442983096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4430f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4431f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4432f3eb5384SStefan Weinhuber 4433ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4434ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 443526a35f37SStefan Weinhuber if (data_size % blksize) 443626a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4437ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4438ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4439ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4440f3eb5384SStefan Weinhuber 4441f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4442f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4443f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4444f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4445f3eb5384SStefan Weinhuber 44467e64db15SJan Höppner if (req_op(req) == REQ_OP_DISCARD) 44477e64db15SJan Höppner return dasd_eckd_build_cp_discard(startdev, block, req, 44487e64db15SJan Höppner first_trk, last_trk); 44497e64db15SJan Höppner 4450f3eb5384SStefan Weinhuber cqr = NULL; 4451f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4452f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4453ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4454ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4455f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4456f3eb5384SStefan Weinhuber first_rec, last_rec, 4457f3eb5384SStefan Weinhuber first_trk, last_trk, 4458f3eb5384SStefan Weinhuber first_offs, last_offs, 4459f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4460ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4461ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4462f3eb5384SStefan Weinhuber cqr = NULL; 4463f3eb5384SStefan Weinhuber } else if (use_prefix && 4464f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4465f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4466f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4467f3eb5384SStefan Weinhuber first_rec, last_rec, 4468f3eb5384SStefan Weinhuber first_trk, last_trk, 4469f3eb5384SStefan Weinhuber first_offs, last_offs, 4470f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4471ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4472ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4473f3eb5384SStefan Weinhuber cqr = NULL; 4474f3eb5384SStefan Weinhuber } 4475f3eb5384SStefan Weinhuber if (!cqr) 4476f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4477f3eb5384SStefan Weinhuber first_rec, last_rec, 4478f3eb5384SStefan Weinhuber first_trk, last_trk, 4479f3eb5384SStefan Weinhuber first_offs, last_offs, 4480f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4481f3eb5384SStefan Weinhuber return cqr; 4482f3eb5384SStefan Weinhuber } 4483f3eb5384SStefan Weinhuber 4484bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4485e4dbb0f2SStefan Haberland struct dasd_block *block, 4486e4dbb0f2SStefan Haberland struct request *req) 4487e4dbb0f2SStefan Haberland { 44889d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4489e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4490e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4491558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 44929d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 44939d2be0c1SJan Höppner struct dasd_device *basedev; 44949d2be0c1SJan Höppner struct req_iterator iter; 44959d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 44969d2be0c1SJan Höppner unsigned int first_offs; 44979d2be0c1SJan Höppner unsigned int trkcount; 44989d2be0c1SJan Höppner unsigned long *idaws; 44999d2be0c1SJan Höppner unsigned int size; 45009d2be0c1SJan Höppner unsigned char cmd; 45019d2be0c1SJan Höppner struct bio_vec bv; 45029d2be0c1SJan Höppner struct ccw1 *ccw; 45039d2be0c1SJan Höppner int use_prefix; 45049d2be0c1SJan Höppner void *data; 45059d2be0c1SJan Höppner char *dst; 4506e4dbb0f2SStefan Haberland 4507e4dbb0f2SStefan Haberland /* 4508e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4509558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4510558b9ef0SStefan Weinhuber * the request with dummy pages. 4511e4dbb0f2SStefan Haberland */ 4512558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4513558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4514558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4515558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4516558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4517558b9ef0SStefan Weinhuber basedev = block->base; 4518558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4519558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4520558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4521e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4522558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 45239d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4524e4dbb0f2SStefan Haberland } 4525e4dbb0f2SStefan Haberland 4526e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4527e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4528e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4529e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4530e4dbb0f2SStefan Haberland first_offs = 0; 4531e4dbb0f2SStefan Haberland 4532e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4533e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4534e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4535e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 45369d2be0c1SJan Höppner else 45379d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4538e4dbb0f2SStefan Haberland 4539e4dbb0f2SStefan Haberland /* 4540e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4541e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4542e4dbb0f2SStefan Haberland */ 4543e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4544e4dbb0f2SStefan Haberland 4545e4dbb0f2SStefan Haberland /* 45469d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 45479d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4548e4dbb0f2SStefan Haberland */ 45499d2be0c1SJan Höppner base_priv = basedev->private; 45509d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 45519d2be0c1SJan Höppner if (use_prefix) { 45529d2be0c1SJan Höppner cplength = 1 + trkcount; 45539d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 45549d2be0c1SJan Höppner } else { 45559d2be0c1SJan Höppner cplength = 2 + trkcount; 45569d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 45579d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 45589d2be0c1SJan Höppner } 45599d2be0c1SJan Höppner size = ALIGN(size, 8); 4560e4dbb0f2SStefan Haberland 45617bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4562e4dbb0f2SStefan Haberland 4563e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4564e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4565c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4566e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 45679d2be0c1SJan Höppner return cqr; 4568e4dbb0f2SStefan Haberland 45699d2be0c1SJan Höppner ccw = cqr->cpaddr; 45709d2be0c1SJan Höppner data = cqr->data; 45719d2be0c1SJan Höppner 45729d2be0c1SJan Höppner if (use_prefix) { 45739d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 45749d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 45759d2be0c1SJan Höppner } else { 45769d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 45779d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 45789d2be0c1SJan Höppner 45799d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 45809d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 45819d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4582e4dbb0f2SStefan Haberland } 4583e4dbb0f2SStefan Haberland 45849d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4585e4dbb0f2SStefan Haberland len_to_track_end = 0; 4586558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4587558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4588558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4589558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4590558b9ef0SStefan Weinhuber ccw->count = 57326; 4591558b9ef0SStefan Weinhuber /* 64k map to one track */ 4592558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4593558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4594558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4595558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4596558b9ef0SStefan Weinhuber ccw++; 4597558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4598558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4599558b9ef0SStefan Weinhuber } 4600e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 46017988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 46027988613bSKent Overstreet seg_len = bv.bv_len; 4603558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4604558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4605e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4606e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4607e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4608e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4609e4dbb0f2SStefan Haberland ccw->count = 57326; 4610e4dbb0f2SStefan Haberland /* 64k map to one track */ 4611e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4612e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4613e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4614e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4615e4dbb0f2SStefan Haberland ccw++; 4616e4dbb0f2SStefan Haberland } 4617e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4618e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4619e4dbb0f2SStefan Haberland } 4620558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4621558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4622e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4623e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4624e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4625e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4626e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4627e4dbb0f2SStefan Haberland cqr->block = block; 4628e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4629c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 46301f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 46311aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4632e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4633e4dbb0f2SStefan Haberland 4634e4dbb0f2SStefan Haberland return cqr; 4635e4dbb0f2SStefan Haberland } 4636e4dbb0f2SStefan Haberland 4637e4dbb0f2SStefan Haberland 46381da177e4SLinus Torvalds static int 46391da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 46401da177e4SLinus Torvalds { 46411da177e4SLinus Torvalds struct dasd_eckd_private *private; 46421da177e4SLinus Torvalds struct ccw1 *ccw; 46435705f702SNeilBrown struct req_iterator iter; 46447988613bSKent Overstreet struct bio_vec bv; 46451da177e4SLinus Torvalds char *dst, *cda; 46461da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 46471da177e4SLinus Torvalds sector_t recid; 46485705f702SNeilBrown int status; 46491da177e4SLinus Torvalds 46501da177e4SLinus Torvalds if (!dasd_page_cache) 46511da177e4SLinus Torvalds goto out; 4652543691a4SSebastian Ott private = cqr->block->base->private; 46538e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 46541da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 465583096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 46561da177e4SLinus Torvalds ccw = cqr->cpaddr; 46571da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 46581da177e4SLinus Torvalds ccw++; 46591da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 46601da177e4SLinus Torvalds ccw++; 46615705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 46627988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 46637988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 46641da177e4SLinus Torvalds /* Skip locate record. */ 46651da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 46661da177e4SLinus Torvalds ccw++; 46671da177e4SLinus Torvalds if (dst) { 46681da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 46691da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 46701da177e4SLinus Torvalds else 46711da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 46721da177e4SLinus Torvalds if (dst != cda) { 46731da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 46747988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 46751da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 46761da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 46771da177e4SLinus Torvalds } 46781da177e4SLinus Torvalds dst = NULL; 46791da177e4SLinus Torvalds } 46801da177e4SLinus Torvalds ccw++; 46811da177e4SLinus Torvalds recid++; 46821da177e4SLinus Torvalds } 46831da177e4SLinus Torvalds } 46841da177e4SLinus Torvalds out: 46851da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 46868e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 46871da177e4SLinus Torvalds return status; 46881da177e4SLinus Torvalds } 46891da177e4SLinus Torvalds 46908e09f215SStefan Weinhuber /* 4691f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 46928e09f215SStefan Weinhuber * 46938e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 46948e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 46958e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 46968e09f215SStefan Weinhuber */ 46978e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 46988e09f215SStefan Weinhuber { 46998e09f215SStefan Weinhuber struct ccw1 *ccw; 47008e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4701f3eb5384SStefan Weinhuber struct tcw *tcw; 4702f3eb5384SStefan Weinhuber struct tccb *tccb; 4703f3eb5384SStefan Weinhuber struct dcw *dcw; 47048e09f215SStefan Weinhuber 4705f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4706f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4707f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4708f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4709f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4710f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4711f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4712f3eb5384SStefan Weinhuber } else { 47138e09f215SStefan Weinhuber ccw = cqr->cpaddr; 47148e09f215SStefan Weinhuber pfxdata = cqr->data; 47158e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 47168e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 47178e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 47188e09f215SStefan Weinhuber } 47198e09f215SStefan Weinhuber } 4720f3eb5384SStefan Weinhuber } 47218e09f215SStefan Weinhuber 47228e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 47238e09f215SStefan Weinhuber 47248e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 47258e09f215SStefan Weinhuber struct dasd_block *block, 47268e09f215SStefan Weinhuber struct request *req) 47278e09f215SStefan Weinhuber { 47287e64db15SJan Höppner struct dasd_device *startdev = NULL; 47298e09f215SStefan Weinhuber struct dasd_eckd_private *private; 47308e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 47317e64db15SJan Höppner unsigned long flags; 47328e09f215SStefan Weinhuber 47337e64db15SJan Höppner /* Discard requests can only be processed on base devices */ 47347e64db15SJan Höppner if (req_op(req) != REQ_OP_DISCARD) 47358e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 47368e09f215SStefan Weinhuber if (!startdev) 47378e09f215SStefan Weinhuber startdev = base; 4738543691a4SSebastian Ott private = startdev->private; 47398e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 47408e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 47418e09f215SStefan Weinhuber 47428e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 47438e09f215SStefan Weinhuber private->count++; 4744e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4745bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4746e4dbb0f2SStefan Haberland else 47478e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 47488e09f215SStefan Weinhuber if (IS_ERR(cqr)) 47498e09f215SStefan Weinhuber private->count--; 47508e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 47518e09f215SStefan Weinhuber return cqr; 47528e09f215SStefan Weinhuber } 47538e09f215SStefan Weinhuber 47548e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 47558e09f215SStefan Weinhuber struct request *req) 47568e09f215SStefan Weinhuber { 47578e09f215SStefan Weinhuber struct dasd_eckd_private *private; 47588e09f215SStefan Weinhuber unsigned long flags; 47598e09f215SStefan Weinhuber 47608e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4761543691a4SSebastian Ott private = cqr->memdev->private; 47628e09f215SStefan Weinhuber private->count--; 47638e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 47648e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 47658e09f215SStefan Weinhuber } 47668e09f215SStefan Weinhuber 47671da177e4SLinus Torvalds static int 47681da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 47691da177e4SLinus Torvalds struct dasd_information2_t * info) 47701da177e4SLinus Torvalds { 4771543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 47721da177e4SLinus Torvalds 47731da177e4SLinus Torvalds info->label_block = 2; 47741da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 47751da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4776543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 47771da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4778543691a4SSebastian Ott sizeof(private->rdc_data)); 47794abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 47804abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 47814abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 47824abb08c2SStefan Weinhuber info->confdata_size); 47831da177e4SLinus Torvalds return 0; 47841da177e4SLinus Torvalds } 47851da177e4SLinus Torvalds 47861da177e4SLinus Torvalds /* 47871da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 47881da177e4SLinus Torvalds */ 47891da177e4SLinus Torvalds 47901da177e4SLinus Torvalds /* 47911da177e4SLinus Torvalds * Release device ioctl. 47921da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 47931da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 47941da177e4SLinus Torvalds */ 47951da177e4SLinus Torvalds static int 47961107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 47971da177e4SLinus Torvalds { 47981da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 47991da177e4SLinus Torvalds int rc; 4800f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4801f932bceaSStefan Weinhuber int useglobal; 48021da177e4SLinus Torvalds 48031da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 48041da177e4SLinus Torvalds return -EACCES; 48051da177e4SLinus Torvalds 4806f932bceaSStefan Weinhuber useglobal = 0; 4807c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 48081da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4809f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4810f932bceaSStefan Weinhuber useglobal = 1; 4811f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4812f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4813f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4814f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4815f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4816f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4817f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 48181da177e4SLinus Torvalds } 4819f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4820f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4821f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4822f3eb5384SStefan Weinhuber ccw->count = 32; 4823f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 48248e09f215SStefan Weinhuber cqr->startdev = device; 48258e09f215SStefan Weinhuber cqr->memdev = device; 48261da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 48271c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4828336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 48291da177e4SLinus Torvalds cqr->expires = 2 * HZ; 48301aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 48311da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 48321da177e4SLinus Torvalds 48331da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 48345a27e60dSStefan Weinhuber if (!rc) 48355a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 48361da177e4SLinus Torvalds 4837f932bceaSStefan Weinhuber if (useglobal) 4838f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4839f932bceaSStefan Weinhuber else 48408e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48411da177e4SLinus Torvalds return rc; 48421da177e4SLinus Torvalds } 48431da177e4SLinus Torvalds 48441da177e4SLinus Torvalds /* 48451da177e4SLinus Torvalds * Reserve device ioctl. 48461da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 48471da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 48481da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 48491da177e4SLinus Torvalds */ 48501da177e4SLinus Torvalds static int 48511107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 48521da177e4SLinus Torvalds { 48531da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 48541da177e4SLinus Torvalds int rc; 4855f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4856f932bceaSStefan Weinhuber int useglobal; 48571da177e4SLinus Torvalds 48581da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 48591da177e4SLinus Torvalds return -EACCES; 48601da177e4SLinus Torvalds 4861f932bceaSStefan Weinhuber useglobal = 0; 4862c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 48631da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4864f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4865f932bceaSStefan Weinhuber useglobal = 1; 4866f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4867f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4868f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4869f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4870f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4871f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4872f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 48731da177e4SLinus Torvalds } 4874f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4875f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4876f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4877f3eb5384SStefan Weinhuber ccw->count = 32; 4878f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 48798e09f215SStefan Weinhuber cqr->startdev = device; 48808e09f215SStefan Weinhuber cqr->memdev = device; 48811da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 48821c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4883336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 48841da177e4SLinus Torvalds cqr->expires = 2 * HZ; 48851aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 48861da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 48871da177e4SLinus Torvalds 48881da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 48895a27e60dSStefan Weinhuber if (!rc) 48905a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 48911da177e4SLinus Torvalds 4892f932bceaSStefan Weinhuber if (useglobal) 4893f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4894f932bceaSStefan Weinhuber else 48958e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 48961da177e4SLinus Torvalds return rc; 48971da177e4SLinus Torvalds } 48981da177e4SLinus Torvalds 48991da177e4SLinus Torvalds /* 49001da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 49011da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 49021da177e4SLinus Torvalds * (unconditional reserve) 49031da177e4SLinus Torvalds */ 49041da177e4SLinus Torvalds static int 49051107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 49061da177e4SLinus Torvalds { 49071da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 49081da177e4SLinus Torvalds int rc; 4909f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4910f932bceaSStefan Weinhuber int useglobal; 49111da177e4SLinus Torvalds 49121da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 49131da177e4SLinus Torvalds return -EACCES; 49141da177e4SLinus Torvalds 4915f932bceaSStefan Weinhuber useglobal = 0; 4916c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 49171da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4918f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4919f932bceaSStefan Weinhuber useglobal = 1; 4920f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4921f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4922f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4923f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4924f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4925f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4926f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 49271da177e4SLinus Torvalds } 4928f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4929f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4930f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4931f3eb5384SStefan Weinhuber ccw->count = 32; 4932f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 49338e09f215SStefan Weinhuber cqr->startdev = device; 49348e09f215SStefan Weinhuber cqr->memdev = device; 49351da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 49361c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4937336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 49381da177e4SLinus Torvalds cqr->expires = 2 * HZ; 49391aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 49401da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 49411da177e4SLinus Torvalds 49421da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 49435a27e60dSStefan Weinhuber if (!rc) 49445a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 49451da177e4SLinus Torvalds 4946f932bceaSStefan Weinhuber if (useglobal) 4947f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4948f932bceaSStefan Weinhuber else 49498e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 49501da177e4SLinus Torvalds return rc; 49511da177e4SLinus Torvalds } 49521da177e4SLinus Torvalds 49531da177e4SLinus Torvalds /* 4954196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4955196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4956196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4957196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4958196339f1SStefan Weinhuber */ 4959196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4960196339f1SStefan Weinhuber void __user *argp) 4961196339f1SStefan Weinhuber { 4962196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4963196339f1SStefan Weinhuber int rc; 4964196339f1SStefan Weinhuber struct ccw1 *ccw; 4965196339f1SStefan Weinhuber int useglobal; 4966196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4967196339f1SStefan Weinhuber 4968196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4969196339f1SStefan Weinhuber return -EACCES; 4970196339f1SStefan Weinhuber 4971196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4972196339f1SStefan Weinhuber return -EFAULT; 4973196339f1SStefan Weinhuber 4974196339f1SStefan Weinhuber useglobal = 0; 4975196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4976c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 4977c5205f2fSSebastian Ott NULL); 4978196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4979196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4980196339f1SStefan Weinhuber useglobal = 1; 4981196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4982196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4983196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4984196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4985196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4986196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4987196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4988196339f1SStefan Weinhuber } 4989196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4990196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4991196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4992196339f1SStefan Weinhuber ccw->count = 12; 4993196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4994196339f1SStefan Weinhuber cqr->startdev = device; 4995196339f1SStefan Weinhuber cqr->memdev = device; 4996196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4997196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 49985a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4999196339f1SStefan Weinhuber cqr->retries = 5; 5000196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 50011aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5002196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 5003196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 5004196339f1SStefan Weinhuber 5005196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 5006196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 5007196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 5008196339f1SStefan Weinhuber rc = -EIO; 5009196339f1SStefan Weinhuber if (!rc) { 5010196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 5011196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 5012196339f1SStefan Weinhuber rc = -EFAULT; 5013196339f1SStefan Weinhuber } 5014196339f1SStefan Weinhuber 5015196339f1SStefan Weinhuber if (useglobal) 5016196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 5017196339f1SStefan Weinhuber else 5018196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 5019196339f1SStefan Weinhuber return rc; 5020196339f1SStefan Weinhuber } 5021196339f1SStefan Weinhuber 5022196339f1SStefan Weinhuber /* 50231da177e4SLinus Torvalds * Read performance statistics 50241da177e4SLinus Torvalds */ 50251da177e4SLinus Torvalds static int 50261107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 50271da177e4SLinus Torvalds { 50281da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 50291da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 50301da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 50311da177e4SLinus Torvalds struct ccw1 *ccw; 50321da177e4SLinus Torvalds int rc; 50331da177e4SLinus Torvalds 503468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 50351da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 50361da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 5037c5205f2fSSebastian Ott device, NULL); 50381da177e4SLinus Torvalds if (IS_ERR(cqr)) { 5039fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 50401da177e4SLinus Torvalds "Could not allocate initialization request"); 50411da177e4SLinus Torvalds return PTR_ERR(cqr); 50421da177e4SLinus Torvalds } 50438e09f215SStefan Weinhuber cqr->startdev = device; 50448e09f215SStefan Weinhuber cqr->memdev = device; 50451da177e4SLinus Torvalds cqr->retries = 0; 5046eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 50471da177e4SLinus Torvalds cqr->expires = 10 * HZ; 50481da177e4SLinus Torvalds 50491da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 50501da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50511da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 50521da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 50535d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 50541da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 50551da177e4SLinus Torvalds 50561da177e4SLinus Torvalds ccw = cqr->cpaddr; 50571da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 50581da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 50591da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 50601da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 50611da177e4SLinus Torvalds 50621da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 50631da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 50641da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 50651da177e4SLinus Torvalds 50661da177e4SLinus Torvalds ccw++; 50671da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 50681da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 50691da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 50701da177e4SLinus Torvalds 50711aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 50721da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 50731da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 50741da177e4SLinus Torvalds if (rc == 0) { 50751da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50761da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 50771107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 50781107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 50791107ccfbSChristoph Hellwig rc = -EFAULT; 50801da177e4SLinus Torvalds } 50818e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 50821da177e4SLinus Torvalds return rc; 50831da177e4SLinus Torvalds } 50841da177e4SLinus Torvalds 50851da177e4SLinus Torvalds /* 50861da177e4SLinus Torvalds * Get attributes (cache operations) 50871da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 50881da177e4SLinus Torvalds */ 50891da177e4SLinus Torvalds static int 50901107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 50911da177e4SLinus Torvalds { 5092543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 50931107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 50941da177e4SLinus Torvalds int rc; 50951da177e4SLinus Torvalds 50961da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 50971da177e4SLinus Torvalds return -EACCES; 50981107ccfbSChristoph Hellwig if (!argp) 50991da177e4SLinus Torvalds return -EINVAL; 51001da177e4SLinus Torvalds 51011107ccfbSChristoph Hellwig rc = 0; 51021107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 51031107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 51041107ccfbSChristoph Hellwig rc = -EFAULT; 51051da177e4SLinus Torvalds 51061da177e4SLinus Torvalds return rc; 51071da177e4SLinus Torvalds } 51081da177e4SLinus Torvalds 51091da177e4SLinus Torvalds /* 51101da177e4SLinus Torvalds * Set attributes (cache operations) 51111da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 51121da177e4SLinus Torvalds */ 51131da177e4SLinus Torvalds static int 51141107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 51151da177e4SLinus Torvalds { 5116543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 51171da177e4SLinus Torvalds struct attrib_data_t attrib; 51181da177e4SLinus Torvalds 51191da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 51201da177e4SLinus Torvalds return -EACCES; 51211107ccfbSChristoph Hellwig if (!argp) 51221da177e4SLinus Torvalds return -EINVAL; 51231da177e4SLinus Torvalds 51241107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 51251da177e4SLinus Torvalds return -EFAULT; 51261da177e4SLinus Torvalds private->attrib = attrib; 51271da177e4SLinus Torvalds 5128fc19f381SStefan Haberland dev_info(&device->cdev->dev, 5129fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 51301da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 51311da177e4SLinus Torvalds return 0; 51321da177e4SLinus Torvalds } 51331da177e4SLinus Torvalds 5134ab1d848fSNigel Hislop /* 5135ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 5136ab1d848fSNigel Hislop * CCWs are PSF and RSSD 5137ab1d848fSNigel Hislop */ 5138ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 5139ab1d848fSNigel Hislop { 5140ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 5141ab1d848fSNigel Hislop char *psf_data, *rssd_result; 5142ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 5143ab1d848fSNigel Hislop struct ccw1 *ccw; 514452898025SNigel Hislop char psf0, psf1; 5145ab1d848fSNigel Hislop int rc; 5146ab1d848fSNigel Hislop 514752898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 514852898025SNigel Hislop return -EACCES; 514952898025SNigel Hislop psf0 = psf1 = 0; 515052898025SNigel Hislop 5151ab1d848fSNigel Hislop /* Copy parms from caller */ 5152ab1d848fSNigel Hislop rc = -EFAULT; 5153ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 5154ab1d848fSNigel Hislop goto out; 515592d62891SHeiko Carstens if (is_compat_task()) { 5156ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 5157ab1d848fSNigel Hislop rc = -EINVAL; 5158f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 5159ab1d848fSNigel Hislop goto out; 5160f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 5161f8b06859SHeiko Carstens goto out; 5162f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 5163f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 5164ab1d848fSNigel Hislop } 51654a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 51664a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 51674a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 51684a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 51694a8ef699SStefan Haberland usrparm.psf_data_len); 51704a8ef699SStefan Haberland rc = -EINVAL; 51714a8ef699SStefan Haberland goto out; 51724a8ef699SStefan Haberland } 5173ab1d848fSNigel Hislop /* alloc I/O data area */ 5174ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 5175ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 5176ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 5177ab1d848fSNigel Hislop rc = -ENOMEM; 5178ab1d848fSNigel Hislop goto out_free; 5179ab1d848fSNigel Hislop } 5180ab1d848fSNigel Hislop 5181ab1d848fSNigel Hislop /* get syscall header from user space */ 5182ab1d848fSNigel Hislop rc = -EFAULT; 5183ab1d848fSNigel Hislop if (copy_from_user(psf_data, 5184ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 5185ab1d848fSNigel Hislop usrparm.psf_data_len)) 5186ab1d848fSNigel Hislop goto out_free; 518752898025SNigel Hislop psf0 = psf_data[0]; 518852898025SNigel Hislop psf1 = psf_data[1]; 5189ab1d848fSNigel Hislop 5190ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 5191c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 5192ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 5193fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5194ab1d848fSNigel Hislop "Could not allocate initialization request"); 5195ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 5196ab1d848fSNigel Hislop goto out_free; 5197ab1d848fSNigel Hislop } 5198ab1d848fSNigel Hislop 5199ab1d848fSNigel Hislop cqr->startdev = device; 5200ab1d848fSNigel Hislop cqr->memdev = device; 5201ab1d848fSNigel Hislop cqr->retries = 3; 5202ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 52031aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5204ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 5205ab1d848fSNigel Hislop 5206ab1d848fSNigel Hislop /* Build the ccws */ 5207ab1d848fSNigel Hislop ccw = cqr->cpaddr; 5208ab1d848fSNigel Hislop 5209ab1d848fSNigel Hislop /* PSF ccw */ 5210ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 5211ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 5212ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 5213ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 5214ab1d848fSNigel Hislop 5215ab1d848fSNigel Hislop ccw++; 5216ab1d848fSNigel Hislop 5217ab1d848fSNigel Hislop /* RSSD ccw */ 5218ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 5219ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 5220ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 5221ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 5222ab1d848fSNigel Hislop 5223ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 5224ab1d848fSNigel Hislop if (rc) 5225ab1d848fSNigel Hislop goto out_sfree; 5226ab1d848fSNigel Hislop 5227ab1d848fSNigel Hislop rc = -EFAULT; 5228ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 5229ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 5230ab1d848fSNigel Hislop goto out_sfree; 5231ab1d848fSNigel Hislop rc = 0; 5232ab1d848fSNigel Hislop 5233ab1d848fSNigel Hislop out_sfree: 5234ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 5235ab1d848fSNigel Hislop out_free: 5236ab1d848fSNigel Hislop kfree(rssd_result); 5237ab1d848fSNigel Hislop kfree(psf_data); 5238ab1d848fSNigel Hislop out: 523952898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 524052898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 524152898025SNigel Hislop (int) psf0, (int) psf1, rc); 5242ab1d848fSNigel Hislop return rc; 5243ab1d848fSNigel Hislop } 5244ab1d848fSNigel Hislop 52451107ccfbSChristoph Hellwig static int 52468e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 52471107ccfbSChristoph Hellwig { 52488e09f215SStefan Weinhuber struct dasd_device *device = block->base; 52498e09f215SStefan Weinhuber 52501107ccfbSChristoph Hellwig switch (cmd) { 52511107ccfbSChristoph Hellwig case BIODASDGATTR: 52521107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 52531107ccfbSChristoph Hellwig case BIODASDSATTR: 52541107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 52551107ccfbSChristoph Hellwig case BIODASDPSRD: 52561107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 52571107ccfbSChristoph Hellwig case BIODASDRLSE: 52581107ccfbSChristoph Hellwig return dasd_eckd_release(device); 52591107ccfbSChristoph Hellwig case BIODASDRSRV: 52601107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 52611107ccfbSChristoph Hellwig case BIODASDSLCK: 52621107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 5263196339f1SStefan Weinhuber case BIODASDSNID: 5264196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 5265ab1d848fSNigel Hislop case BIODASDSYMMIO: 5266ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 52671107ccfbSChristoph Hellwig default: 52686b79d14eSHeiko Carstens return -ENOTTY; 52691107ccfbSChristoph Hellwig } 52701107ccfbSChristoph Hellwig } 52711107ccfbSChristoph Hellwig 52721da177e4SLinus Torvalds /* 5273445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 5274445b5b49SHorst Hummel * and return number of printed chars. 5275445b5b49SHorst Hummel */ 52764d284cacSHeiko Carstens static int 5277445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 5278445b5b49SHorst Hummel { 5279445b5b49SHorst Hummel int len, count; 5280445b5b49SHorst Hummel char *datap; 5281445b5b49SHorst Hummel 5282445b5b49SHorst Hummel len = 0; 5283445b5b49SHorst Hummel while (from <= to) { 5284773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5285445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 5286445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 5287445b5b49SHorst Hummel 5288445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 5289445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 5290445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 5291445b5b49SHorst Hummel else 5292445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 5293445b5b49SHorst Hummel 5294445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 5295445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 5296445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 5297445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 5298445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 5299445b5b49SHorst Hummel } 5300445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 5301445b5b49SHorst Hummel from++; 5302445b5b49SHorst Hummel } 5303445b5b49SHorst Hummel return len; 5304445b5b49SHorst Hummel } 5305445b5b49SHorst Hummel 5306fc19f381SStefan Haberland static void 5307aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 5308aeec92caSStefan Haberland char *reason) 5309fc19f381SStefan Haberland { 5310fc19f381SStefan Haberland u64 *sense; 5311a5a0061fSStefan Weinhuber u64 *stat; 5312fc19f381SStefan Haberland 5313aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 5314a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 5315fc19f381SStefan Haberland if (sense) { 5316a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 5317a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 5318a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5319ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 5320fc19f381SStefan Haberland } else { 5321a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 5322a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 5323a5a0061fSStefan Weinhuber "NO VALID SENSE"); 5324fc19f381SStefan Haberland } 5325fc19f381SStefan Haberland } 5326fc19f381SStefan Haberland 5327445b5b49SHorst Hummel /* 53281da177e4SLinus Torvalds * Print sense data and related channel program. 53291da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 53301da177e4SLinus Torvalds */ 5331f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 53328e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 53331da177e4SLinus Torvalds { 53341da177e4SLinus Torvalds char *page; 5335445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 5336445b5b49SHorst Hummel int len, sl, sct; 53371da177e4SLinus Torvalds 53381da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 53391da177e4SLinus Torvalds if (page == NULL) { 5340fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5341fc19f381SStefan Haberland "No memory to dump sense data\n"); 53421da177e4SLinus Torvalds return; 53431da177e4SLinus Torvalds } 5344445b5b49SHorst Hummel /* dump the sense data */ 5345773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 53461da177e4SLinus Torvalds " I/O status report for device %s:\n", 53472a0217d5SKay Sievers dev_name(&device->cdev->dev)); 5348773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5349a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5350a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5351a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5352a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5353a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5354a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5355773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 53561da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 53572a0217d5SKay Sievers dev_name(&device->cdev->dev), 535823d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 53591da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 53601da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5361773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 53621da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 53631da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 53641da177e4SLinus Torvalds 53651da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 53661da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 53671da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 53681da177e4SLinus Torvalds } 53691da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 53701da177e4SLinus Torvalds } 53711da177e4SLinus Torvalds 53721da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 53731da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5374773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53751da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 53761da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 53771da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 53781da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 53791da177e4SLinus Torvalds } else { 53801da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5381773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53821da177e4SLinus Torvalds " 32 Byte: Format: %x " 53831da177e4SLinus Torvalds "Exception class %x\n", 53841da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 53851da177e4SLinus Torvalds } 53861da177e4SLinus Torvalds } else { 5387773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 53881da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 53891da177e4SLinus Torvalds } 5390773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 53911da177e4SLinus Torvalds 53928e09f215SStefan Weinhuber if (req) { 53938e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5394445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5395445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5396445b5b49SHorst Hummel first = req->cpaddr; 5397445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5398445b5b49SHorst Hummel to = min(first + 6, last); 5399773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 54001da177e4SLinus Torvalds " Related CP in req: %p\n", req); 5401445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 5402773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 54031da177e4SLinus Torvalds 5404445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5405445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 54061da177e4SLinus Torvalds len = 0; 5407445b5b49SHorst Hummel from = ++to; 540823d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 540923d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5410445b5b49SHorst Hummel if (from < fail - 2) { 5411445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5412773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 54131da177e4SLinus Torvalds } 5414445b5b49SHorst Hummel to = min(fail + 1, last); 5415445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 54161da177e4SLinus Torvalds 5417445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5418445b5b49SHorst Hummel from = max(from, ++to); 5419445b5b49SHorst Hummel if (from < last - 1) { 5420445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5421773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 54221da177e4SLinus Torvalds } 5423445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 54241da177e4SLinus Torvalds if (len > 0) 5425773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 54268e09f215SStefan Weinhuber } 54271da177e4SLinus Torvalds free_page((unsigned long) page); 54281da177e4SLinus Torvalds } 54291da177e4SLinus Torvalds 5430f3eb5384SStefan Weinhuber 5431f3eb5384SStefan Weinhuber /* 5432f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5433f3eb5384SStefan Weinhuber */ 5434f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5435f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5436f3eb5384SStefan Weinhuber { 5437f3eb5384SStefan Weinhuber char *page; 5438f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5439f3eb5384SStefan Weinhuber struct tsb *tsb; 5440ef19298bSStefan Weinhuber u8 *sense, *rcq; 5441f3eb5384SStefan Weinhuber 5442f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5443f3eb5384SStefan Weinhuber if (page == NULL) { 5444fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5445f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5446f3eb5384SStefan Weinhuber return; 5447f3eb5384SStefan Weinhuber } 5448f3eb5384SStefan Weinhuber /* dump the sense data */ 5449773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5450f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5451f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5452773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5453a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5454a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5455a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5456a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5457a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5458a521b048SStefan Haberland irb->scsw.tm.fcxs, 5459a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5460a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5461773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5462f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5463f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5464f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5465f3eb5384SStefan Weinhuber 5466f3eb5384SStefan Weinhuber tsb = NULL; 5467f3eb5384SStefan Weinhuber sense = NULL; 5468a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5469f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5470f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5471f3eb5384SStefan Weinhuber 5472b8fde722SStefan Haberland if (tsb) { 5473773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5474f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5475773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5476f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5477773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5478f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5479773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5480f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5481f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5482773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5483f3eb5384SStefan Weinhuber " residual %d\n", residual); 5484f3eb5384SStefan Weinhuber 5485f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5486f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5487773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5488f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5489f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5490773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5491f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5492f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5493773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5494f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5495f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5496773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5497f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5498f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5499773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5500f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5501f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5502f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5503f3eb5384SStefan Weinhuber break; 5504f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5505773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5506f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5507ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5508773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5509ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5510ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5511ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5512f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5513f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5514ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5515f3eb5384SStefan Weinhuber } 5516f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5517f3eb5384SStefan Weinhuber } 5518f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5519f3eb5384SStefan Weinhuber break; 5520f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5521773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 55228693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5523f3eb5384SStefan Weinhuber break; 5524f3eb5384SStefan Weinhuber } 5525f3eb5384SStefan Weinhuber 5526f3eb5384SStefan Weinhuber if (sense) { 5527f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5528773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5529f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5530f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5531f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5532f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5533f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5534f3eb5384SStefan Weinhuber } 5535f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5536f3eb5384SStefan Weinhuber } 5537f3eb5384SStefan Weinhuber 5538f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5539f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5540773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5541f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5542f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5543f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5544f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5545f3eb5384SStefan Weinhuber } else { 5546f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5547773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5548f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5549f3eb5384SStefan Weinhuber "Exception class %x\n", 5550f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5551f3eb5384SStefan Weinhuber } 5552f3eb5384SStefan Weinhuber } else { 5553773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5554f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5555f3eb5384SStefan Weinhuber } 5556f3eb5384SStefan Weinhuber } else { 5557773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5558f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5559f3eb5384SStefan Weinhuber } 5560773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5561f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5562f3eb5384SStefan Weinhuber } 5563f3eb5384SStefan Weinhuber 5564f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5565f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5566f3eb5384SStefan Weinhuber { 55678fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 55688fd57520SJan Höppner 55698fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 55708fd57520SJan Höppner /* 55718fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 55728fd57520SJan Höppner * error might be expected and log messages shouldn't be written 55738fd57520SJan Höppner * then. Check if the according suppress bit is set. 55748fd57520SJan Höppner */ 55758fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 55768fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 55778fd57520SJan Höppner return; 55788fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 55798fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 55808fd57520SJan Höppner return; 55818fd57520SJan Höppner 5582f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 55838fd57520SJan Höppner } else { 55848fd57520SJan Höppner /* 5585ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5586ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5587ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 55888fd57520SJan Höppner */ 5589ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5590ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5591ab24fbd3SStefan Haberland return; 5592ab24fbd3SStefan Haberland 55938fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 55948fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 55958fd57520SJan Höppner return; 55968fd57520SJan Höppner 5597f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5598f3eb5384SStefan Weinhuber } 55998fd57520SJan Höppner } 5600f3eb5384SStefan Weinhuber 5601501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 5602d41dd122SStefan Haberland { 5603d41dd122SStefan Haberland /* 5604d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 5605d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 5606d41dd122SStefan Haberland * information like PAV support that might have changed 5607d41dd122SStefan Haberland */ 5608d41dd122SStefan Haberland dasd_alias_remove_device(device); 5609d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5610d41dd122SStefan Haberland 5611d41dd122SStefan Haberland return 0; 5612d41dd122SStefan Haberland } 5613d41dd122SStefan Haberland 5614501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 5615d41dd122SStefan Haberland { 5616543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 56176fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 5618f9f8d02fSStefan Haberland int rc; 5619d41dd122SStefan Haberland struct dasd_uid temp_uid; 5620a7602f6cSStefan Haberland unsigned long flags; 5621ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 5622d41dd122SStefan Haberland 5623d41dd122SStefan Haberland /* Read Configuration Data */ 5624251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5625251afd69SStefan Haberland if (rc) { 5626251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5627251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5628251afd69SStefan Haberland goto out_err; 5629251afd69SStefan Haberland } 5630d41dd122SStefan Haberland 56312dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 56322dedf0d9SStefan Haberland /* Generate device unique id */ 56332dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 56342dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5635d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 5636a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 5637a7602f6cSStefan Haberland "changed\n"); 56382dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5639d41dd122SStefan Haberland if (rc) 5640d41dd122SStefan Haberland goto out_err; 5641d41dd122SStefan Haberland 5642d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 5643f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 5644f9f8d02fSStefan Haberland if (rc) 5645251afd69SStefan Haberland goto out_err; 5646ea4da6eaSStefan Haberland 5647ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 5648ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 5649f4ac1d02SStefan Weinhuber 5650f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 5651251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5652251afd69SStefan Haberland if (rc) { 5653251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5654251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5655251afd69SStefan Haberland goto out_err2; 5656251afd69SStefan Haberland } 5657d41dd122SStefan Haberland 5658d41dd122SStefan Haberland /* Read Feature Codes */ 565968d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 5660d41dd122SStefan Haberland 5661c729696bSJan Höppner /* Read Volume Information */ 5662dd454839SJan Höppner dasd_eckd_read_vol_info(device); 5663c729696bSJan Höppner 5664c729696bSJan Höppner /* Read Extent Pool Information */ 5665dd454839SJan Höppner dasd_eckd_read_ext_pool_info(device); 5666c729696bSJan Höppner 5667d41dd122SStefan Haberland /* Read Device Characteristics */ 566868b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 56696fca97a9SStefan Haberland &temp_rdc_data, 64); 5670d41dd122SStefan Haberland if (rc) { 5671b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5672b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 5673251afd69SStefan Haberland goto out_err2; 5674d41dd122SStefan Haberland } 5675a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 56766fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5677a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5678d41dd122SStefan Haberland 5679d41dd122SStefan Haberland /* add device to alias management */ 5680d41dd122SStefan Haberland dasd_alias_add_device(device); 5681d41dd122SStefan Haberland 5682d41dd122SStefan Haberland return 0; 5683d41dd122SStefan Haberland 5684251afd69SStefan Haberland out_err2: 5685251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5686d41dd122SStefan Haberland out_err: 5687e6125fbaSStefan Haberland return -1; 5688d41dd122SStefan Haberland } 5689d41dd122SStefan Haberland 5690501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5691501183f2SStefan Haberland { 5692543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5693501183f2SStefan Haberland int rc, old_base; 56942dedf0d9SStefan Haberland char print_uid[60]; 56952dedf0d9SStefan Haberland struct dasd_uid uid; 56962dedf0d9SStefan Haberland unsigned long flags; 5697501183f2SStefan Haberland 569859a9ed5fSStefan Haberland /* 569959a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 570059a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 570159a9ed5fSStefan Haberland */ 570259a9ed5fSStefan Haberland dasd_alias_remove_device(device); 570359a9ed5fSStefan Haberland 57042dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5705501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 57062dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 57072dedf0d9SStefan Haberland 5708501183f2SStefan Haberland /* Read Configuration Data */ 5709501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5710501183f2SStefan Haberland if (rc) 5711501183f2SStefan Haberland goto out_err; 5712501183f2SStefan Haberland 57132dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5714501183f2SStefan Haberland if (rc) 5715501183f2SStefan Haberland goto out_err; 5716501183f2SStefan Haberland /* 5717501183f2SStefan Haberland * update unit address configuration and 5718501183f2SStefan Haberland * add device to alias management 5719501183f2SStefan Haberland */ 5720501183f2SStefan Haberland dasd_alias_update_add_device(device); 5721501183f2SStefan Haberland 57222dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 57232dedf0d9SStefan Haberland 57242dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 57252dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 57262dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 57272dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 57282dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5729501183f2SStefan Haberland else 57302dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 57312dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 57322dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5733501183f2SStefan Haberland 5734501183f2SStefan Haberland dev_info(&device->cdev->dev, 5735501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 57362dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5737501183f2SStefan Haberland } 5738501183f2SStefan Haberland return 0; 5739501183f2SStefan Haberland 5740501183f2SStefan Haberland out_err: 5741501183f2SStefan Haberland return -1; 5742501183f2SStefan Haberland } 5743501183f2SStefan Haberland 57445db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 57455db8440cSStefan Haberland struct dasd_rssd_messages *messages, 57465db8440cSStefan Haberland __u8 lpum) 57475db8440cSStefan Haberland { 57485db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 57495db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 57505db8440cSStefan Haberland struct dasd_ccw_req *cqr; 57515db8440cSStefan Haberland struct ccw1 *ccw; 57525db8440cSStefan Haberland int rc; 57535db8440cSStefan Haberland 57545db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 57555db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 57565db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5757c5205f2fSSebastian Ott device, NULL); 57585db8440cSStefan Haberland if (IS_ERR(cqr)) { 57595db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 57605db8440cSStefan Haberland "Could not allocate read message buffer request"); 57615db8440cSStefan Haberland return PTR_ERR(cqr); 57625db8440cSStefan Haberland } 57635db8440cSStefan Haberland 5764af775210SStefan Haberland cqr->lpm = lpum; 5765af775210SStefan Haberland retry: 57665db8440cSStefan Haberland cqr->startdev = device; 57675db8440cSStefan Haberland cqr->memdev = device; 57685db8440cSStefan Haberland cqr->block = NULL; 57695db8440cSStefan Haberland cqr->expires = 10 * HZ; 57705db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5771b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5772b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5773b179b037SStefan Haberland * do basic erp */ 5774b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5775b179b037SStefan Haberland cqr->retries = 256; 57765db8440cSStefan Haberland 57775db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 57785db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 57795db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 57805db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 57815db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 57825db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 57835db8440cSStefan Haberland 57845db8440cSStefan Haberland ccw = cqr->cpaddr; 57855db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 57865db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 57875db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 57885db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 57895db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 57905db8440cSStefan Haberland 57915db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 57925db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 57935db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 57945db8440cSStefan Haberland 57955db8440cSStefan Haberland ccw++; 57965db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 57975db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 57985db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 57995db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 58005db8440cSStefan Haberland 58015db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 58025db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 58035db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 58045db8440cSStefan Haberland if (rc == 0) { 58055db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58065db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 58075db8440cSStefan Haberland (prssdp + 1); 58085db8440cSStefan Haberland memcpy(messages, message_buf, 58095db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5810af775210SStefan Haberland } else if (cqr->lpm) { 5811af775210SStefan Haberland /* 5812af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5813af775210SStefan Haberland * but instead we get the required information on any path 5814af775210SStefan Haberland * so retry with open path mask 5815af775210SStefan Haberland */ 5816af775210SStefan Haberland cqr->lpm = 0; 5817af775210SStefan Haberland goto retry; 58185db8440cSStefan Haberland } else 58195db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 58205db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 58215db8440cSStefan Haberland , rc); 58225db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 58235db8440cSStefan Haberland return rc; 58245db8440cSStefan Haberland } 58255db8440cSStefan Haberland 58265a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 58275a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 58285a3b7b11SStefan Haberland { 58295a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 58305a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 58315a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 58325a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 58335a3b7b11SStefan Haberland struct ccw1 *ccw; 58345a3b7b11SStefan Haberland int rc; 58355a3b7b11SStefan Haberland 58365a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 58375a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 58385a3b7b11SStefan Haberland return -EOPNOTSUPP; 58395a3b7b11SStefan Haberland 5840ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5841ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5842ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5843ccd53fa2SStefan Haberland 58445a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 58455a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5846c5205f2fSSebastian Ott device, NULL); 58475a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 58485a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58495a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 58505a3b7b11SStefan Haberland return PTR_ERR(cqr); 58515a3b7b11SStefan Haberland } 58525a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 58535a3b7b11SStefan Haberland if (!host_access) { 58545a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 58555a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 58565a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 58575a3b7b11SStefan Haberland return -ENOMEM; 58585a3b7b11SStefan Haberland } 58595a3b7b11SStefan Haberland cqr->startdev = device; 58605a3b7b11SStefan Haberland cqr->memdev = device; 58615a3b7b11SStefan Haberland cqr->block = NULL; 58625a3b7b11SStefan Haberland cqr->retries = 256; 58635a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 58645a3b7b11SStefan Haberland 58655a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 58665a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 58675a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 58685a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 58695a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 58705a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 58715a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 58725a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 58735a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 58745a3b7b11SStefan Haberland 58755a3b7b11SStefan Haberland ccw = cqr->cpaddr; 58765a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 58775a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 58785a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 58795a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58805a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 58815a3b7b11SStefan Haberland 58825a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 58835a3b7b11SStefan Haberland ccw++; 58845a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 58855a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 58865a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 58875a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 58885a3b7b11SStefan Haberland 58895a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 58905a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5891ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5892ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5893f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 58945a3b7b11SStefan Haberland if (rc == 0) { 58955a3b7b11SStefan Haberland *data = *host_access; 58965a3b7b11SStefan Haberland } else { 58975a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 58985a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 58995a3b7b11SStefan Haberland rc); 59005a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 59015a3b7b11SStefan Haberland } 59025a3b7b11SStefan Haberland 59035a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 59045a3b7b11SStefan Haberland kfree(host_access); 59055a3b7b11SStefan Haberland return rc; 59065a3b7b11SStefan Haberland } 59075a3b7b11SStefan Haberland /* 59085a3b7b11SStefan Haberland * return number of grouped devices 59095a3b7b11SStefan Haberland */ 59105a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 59115a3b7b11SStefan Haberland { 59125a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 59135a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 59145a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 59155a3b7b11SStefan Haberland int count = 0; 59165a3b7b11SStefan Haberland int rc, i; 59175a3b7b11SStefan Haberland 59185a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 59195a3b7b11SStefan Haberland if (!access) { 59205a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59215a3b7b11SStefan Haberland "Could not allocate access buffer"); 59225a3b7b11SStefan Haberland return -ENOMEM; 59235a3b7b11SStefan Haberland } 59245a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 59255a3b7b11SStefan Haberland if (rc) { 59265a3b7b11SStefan Haberland kfree(access); 59275a3b7b11SStefan Haberland return rc; 59285a3b7b11SStefan Haberland } 59295a3b7b11SStefan Haberland 59305a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 59315a3b7b11SStefan Haberland access->host_access_information; 59325a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 59335a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 59345a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 59355a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 59365a3b7b11SStefan Haberland count++; 59375a3b7b11SStefan Haberland } 59385a3b7b11SStefan Haberland 59395a3b7b11SStefan Haberland kfree(access); 59405a3b7b11SStefan Haberland return count; 59415a3b7b11SStefan Haberland } 59425a3b7b11SStefan Haberland 59435a3b7b11SStefan Haberland /* 59445a3b7b11SStefan Haberland * write host access information to a sequential file 59455a3b7b11SStefan Haberland */ 59465a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 59475a3b7b11SStefan Haberland { 59485a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 59495a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 59505a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 59515a3b7b11SStefan Haberland char sysplex[9] = ""; 5952c7848e14SChristophe JAILLET int rc, i; 59535a3b7b11SStefan Haberland 59545a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 59555a3b7b11SStefan Haberland if (!access) { 59565a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 59575a3b7b11SStefan Haberland "Could not allocate access buffer"); 59585a3b7b11SStefan Haberland return -ENOMEM; 59595a3b7b11SStefan Haberland } 59605a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 59615a3b7b11SStefan Haberland if (rc) { 59625a3b7b11SStefan Haberland kfree(access); 59635a3b7b11SStefan Haberland return rc; 59645a3b7b11SStefan Haberland } 59655a3b7b11SStefan Haberland 59665a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 59675a3b7b11SStefan Haberland access->host_access_information; 59685a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 59695a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 59705a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 59715a3b7b11SStefan Haberland /* PGID */ 5972c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 59735a3b7b11SStefan Haberland /* FLAGS */ 59745a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 59755a3b7b11SStefan Haberland /* SYSPLEX NAME */ 59765a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 59775a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 59785a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 59795a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 59805a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 59815a3b7b11SStefan Haberland /* TIMESTAMP */ 59825a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 59835a3b7b11SStefan Haberland entry->timestamp); 59845a3b7b11SStefan Haberland } 59855a3b7b11SStefan Haberland kfree(access); 59865a3b7b11SStefan Haberland 59875a3b7b11SStefan Haberland return 0; 59885a3b7b11SStefan Haberland } 59895a3b7b11SStefan Haberland 59905db8440cSStefan Haberland /* 59915db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 59925db8440cSStefan Haberland */ 59935db8440cSStefan Haberland static int 59945db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5995a521b048SStefan Haberland __u32 message_id, __u8 lpum) 59965db8440cSStefan Haberland { 59975db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 5998a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 59995db8440cSStefan Haberland struct dasd_ccw_req *cqr; 60005db8440cSStefan Haberland struct ccw1 *ccw; 60015db8440cSStefan Haberland int rc; 60025db8440cSStefan Haberland 60035db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 60045db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 6005c5205f2fSSebastian Ott device, NULL); 60065db8440cSStefan Haberland 60075db8440cSStefan Haberland if (IS_ERR(cqr)) { 60085db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 60095db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 60105db8440cSStefan Haberland return PTR_ERR(cqr); 60115db8440cSStefan Haberland } 60125db8440cSStefan Haberland 60135db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 60145db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 60155db8440cSStefan Haberland psf_cuir->cc = response; 6016a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 60175db8440cSStefan Haberland psf_cuir->message_id = message_id; 6018a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 6019a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 60205db8440cSStefan Haberland ccw = cqr->cpaddr; 60215db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 60225db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 6023b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 60245db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 60255db8440cSStefan Haberland 60265db8440cSStefan Haberland cqr->startdev = device; 60275db8440cSStefan Haberland cqr->memdev = device; 60285db8440cSStefan Haberland cqr->block = NULL; 60295db8440cSStefan Haberland cqr->retries = 256; 60305db8440cSStefan Haberland cqr->expires = 10*HZ; 60315db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 60325db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 6033b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 60345db8440cSStefan Haberland 60355db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 60365db8440cSStefan Haberland 60375db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 60385db8440cSStefan Haberland return rc; 60395db8440cSStefan Haberland } 60405db8440cSStefan Haberland 6041b179b037SStefan Haberland /* 6042b179b037SStefan Haberland * return configuration data that is referenced by record selector 6043b179b037SStefan Haberland * if a record selector is specified or per default return the 6044b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 6045b179b037SStefan Haberland */ 6046b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 6047b179b037SStefan Haberland __u8 lpum, 6048b179b037SStefan Haberland struct dasd_cuir_message *cuir) 60495db8440cSStefan Haberland { 6050b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6051b179b037SStefan Haberland int path, pos; 60525db8440cSStefan Haberland 6053b179b037SStefan Haberland if (cuir->record_selector == 0) 6054b179b037SStefan Haberland goto out; 6055b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 6056c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 6057b179b037SStefan Haberland if (conf_data->gneq.record_selector == 6058b179b037SStefan Haberland cuir->record_selector) 6059b179b037SStefan Haberland return conf_data; 60605db8440cSStefan Haberland } 6061b179b037SStefan Haberland out: 6062c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 60635db8440cSStefan Haberland } 60645db8440cSStefan Haberland 60655db8440cSStefan Haberland /* 6066b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 6067b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 6068b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 6069b179b037SStefan Haberland * 6070b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 6071b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 6072b179b037SStefan Haberland * on. 6073b179b037SStefan Haberland */ 6074b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 6075b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6076b179b037SStefan Haberland { 6077b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 6078b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 6079b179b037SStefan Haberland struct dasd_conf_data *conf_data; 6080b179b037SStefan Haberland unsigned int pos, path; 6081b179b037SStefan Haberland char *ref_gneq, *gneq; 6082b179b037SStefan Haberland char *ref_ned, *ned; 6083b179b037SStefan Haberland int tbcpm = 0; 6084b179b037SStefan Haberland 6085b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 6086b179b037SStefan Haberland the attention message was presented on */ 6087b179b037SStefan Haberland if (!cuir->ned_map || 6088b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 6089b179b037SStefan Haberland return lpum; 6090b179b037SStefan Haberland 6091b179b037SStefan Haberland /* get reference conf data */ 6092b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 6093b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 6094b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6095b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 6096b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 6097b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 6098b179b037SStefan Haberland mask = cuir->neq_map[2]; 6099b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 6100b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 6101b179b037SStefan Haberland 6102c9346151SStefan Haberland for (path = 0; path < 8; path++) { 6103b179b037SStefan Haberland /* initialise data per path */ 6104b179b037SStefan Haberland bitmask = mask; 6105c9346151SStefan Haberland conf_data = device->path[path].conf_data; 6106b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 6107b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 6108b179b037SStefan Haberland /* compare reference ned and per path ned */ 6109b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 6110b179b037SStefan Haberland continue; 6111b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 6112b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 6113b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 6114b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 6115b179b037SStefan Haberland while (bitmask) { 6116b179b037SStefan Haberland pos = ffs(bitmask) - 1; 6117b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 6118b179b037SStefan Haberland != 0) 6119b179b037SStefan Haberland break; 6120b179b037SStefan Haberland clear_bit(pos, &bitmask); 6121b179b037SStefan Haberland } 6122b179b037SStefan Haberland if (bitmask) 6123b179b037SStefan Haberland continue; 6124b179b037SStefan Haberland /* device and path match the reference values 6125b179b037SStefan Haberland add path to CUIR scope */ 6126c9346151SStefan Haberland tbcpm |= 0x80 >> path; 6127b179b037SStefan Haberland } 6128b179b037SStefan Haberland return tbcpm; 6129b179b037SStefan Haberland } 6130b179b037SStefan Haberland 6131b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 6132a521b048SStefan Haberland unsigned long paths, int action) 6133b179b037SStefan Haberland { 6134b179b037SStefan Haberland int pos; 6135b179b037SStefan Haberland 6136b179b037SStefan Haberland while (paths) { 6137b179b037SStefan Haberland /* get position of bit in mask */ 6138a521b048SStefan Haberland pos = 8 - ffs(paths); 6139b179b037SStefan Haberland /* get channel path descriptor from this position */ 6140b179b037SStefan Haberland if (action == CUIR_QUIESCE) 6141a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 6142a521b048SStefan Haberland device->path[pos].cssid, 6143a521b048SStefan Haberland device->path[pos].chpid); 6144b179b037SStefan Haberland else if (action == CUIR_RESUME) 6145a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 6146a521b048SStefan Haberland device->path[pos].cssid, 6147a521b048SStefan Haberland device->path[pos].chpid); 6148a521b048SStefan Haberland clear_bit(7 - pos, &paths); 6149b179b037SStefan Haberland } 6150b179b037SStefan Haberland } 6151b179b037SStefan Haberland 6152b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 6153b179b037SStefan Haberland struct dasd_cuir_message *cuir) 6154b179b037SStefan Haberland { 6155b179b037SStefan Haberland unsigned long tbcpm; 6156b179b037SStefan Haberland 6157b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 6158b179b037SStefan Haberland /* nothing to do if path is not in use */ 6159c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 6160b179b037SStefan Haberland return 0; 6161c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 6162b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 6163b179b037SStefan Haberland return error */ 6164b179b037SStefan Haberland return -EINVAL; 6165b179b037SStefan Haberland } 6166b179b037SStefan Haberland /* remove device from operational path mask */ 6167c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 6168c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 6169b179b037SStefan Haberland return tbcpm; 6170b179b037SStefan Haberland } 6171b179b037SStefan Haberland 6172b179b037SStefan Haberland /* 6173b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 6174b179b037SStefan Haberland * return an error if the last path to a device would be removed 61755db8440cSStefan Haberland * 61765db8440cSStefan Haberland * if only part of the devices are quiesced and an error 61775db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 61785db8440cSStefan Haberland * notify the already set offline devices again 61795db8440cSStefan Haberland */ 61805db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 6181b179b037SStefan Haberland struct dasd_cuir_message *cuir) 61825db8440cSStefan Haberland { 6183543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 61845db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 61855db8440cSStefan Haberland struct dasd_device *dev, *n; 6186b179b037SStefan Haberland unsigned long paths = 0; 6187b179b037SStefan Haberland unsigned long flags; 6188b179b037SStefan Haberland int tbcpm; 61895db8440cSStefan Haberland 61905db8440cSStefan Haberland /* active devices */ 6191b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 61925db8440cSStefan Haberland alias_list) { 6193b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6194b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6195b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6196b179b037SStefan Haberland if (tbcpm < 0) 6197b179b037SStefan Haberland goto out_err; 6198b179b037SStefan Haberland paths |= tbcpm; 61995db8440cSStefan Haberland } 62005db8440cSStefan Haberland /* inactive devices */ 6201b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 62025db8440cSStefan Haberland alias_list) { 6203b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6204b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6205b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 6206b179b037SStefan Haberland if (tbcpm < 0) 6207b179b037SStefan Haberland goto out_err; 6208b179b037SStefan Haberland paths |= tbcpm; 62095db8440cSStefan Haberland } 62105db8440cSStefan Haberland /* devices in PAV groups */ 62115db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 62125db8440cSStefan Haberland &private->lcu->grouplist, group) { 62135db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 62145db8440cSStefan Haberland alias_list) { 6215b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6216b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6217b179b037SStefan Haberland spin_unlock_irqrestore( 6218b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6219b179b037SStefan Haberland if (tbcpm < 0) 6220b179b037SStefan Haberland goto out_err; 6221b179b037SStefan Haberland paths |= tbcpm; 62225db8440cSStefan Haberland } 62235db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 62245db8440cSStefan Haberland alias_list) { 6225b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 6226b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 6227b179b037SStefan Haberland spin_unlock_irqrestore( 6228b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 6229b179b037SStefan Haberland if (tbcpm < 0) 6230b179b037SStefan Haberland goto out_err; 6231b179b037SStefan Haberland paths |= tbcpm; 62325db8440cSStefan Haberland } 62335db8440cSStefan Haberland } 6234b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6235a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 6236b179b037SStefan Haberland return 0; 6237b179b037SStefan Haberland out_err: 6238b179b037SStefan Haberland return tbcpm; 62395db8440cSStefan Haberland } 62405db8440cSStefan Haberland 62415db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 6242b179b037SStefan Haberland struct dasd_cuir_message *cuir) 62435db8440cSStefan Haberland { 6244543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 62455db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 62465db8440cSStefan Haberland struct dasd_device *dev, *n; 6247b179b037SStefan Haberland unsigned long paths = 0; 6248b179b037SStefan Haberland int tbcpm; 62495db8440cSStefan Haberland 62505db8440cSStefan Haberland /* 62515db8440cSStefan Haberland * the path may have been added through a generic path event before 62525db8440cSStefan Haberland * only trigger path verification if the path is not already in use 62535db8440cSStefan Haberland */ 62545db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62555db8440cSStefan Haberland &private->lcu->active_devices, 62565db8440cSStefan Haberland alias_list) { 6257b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6258b179b037SStefan Haberland paths |= tbcpm; 6259c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6260c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62615db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62625db8440cSStefan Haberland } 62635db8440cSStefan Haberland } 62645db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62655db8440cSStefan Haberland &private->lcu->inactive_devices, 62665db8440cSStefan Haberland alias_list) { 6267b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6268b179b037SStefan Haberland paths |= tbcpm; 6269c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6270c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62715db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62725db8440cSStefan Haberland } 62735db8440cSStefan Haberland } 62745db8440cSStefan Haberland /* devices in PAV groups */ 62755db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 62765db8440cSStefan Haberland &private->lcu->grouplist, 62775db8440cSStefan Haberland group) { 62785db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62795db8440cSStefan Haberland &pavgroup->baselist, 62805db8440cSStefan Haberland alias_list) { 6281b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6282b179b037SStefan Haberland paths |= tbcpm; 6283c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6284c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62855db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62865db8440cSStefan Haberland } 62875db8440cSStefan Haberland } 62885db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 62895db8440cSStefan Haberland &pavgroup->aliaslist, 62905db8440cSStefan Haberland alias_list) { 6291b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 6292b179b037SStefan Haberland paths |= tbcpm; 6293c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 6294c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 62955db8440cSStefan Haberland dasd_schedule_device_bh(dev); 62965db8440cSStefan Haberland } 62975db8440cSStefan Haberland } 62985db8440cSStefan Haberland } 6299b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 6300a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 6301b179b037SStefan Haberland return 0; 63025db8440cSStefan Haberland } 63035db8440cSStefan Haberland 63045db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 63055db8440cSStefan Haberland __u8 lpum) 63065db8440cSStefan Haberland { 63075db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 6308a521b048SStefan Haberland int response; 63095db8440cSStefan Haberland 6310b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6311b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 6312b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 6313b179b037SStefan Haberland ((u32 *)cuir)[3]); 63145db8440cSStefan Haberland 63155db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 63165db8440cSStefan Haberland /* quiesce */ 6317a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 6318b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 6319b179b037SStefan Haberland else 6320b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 63215db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 63225db8440cSStefan Haberland /* resume */ 6323a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 6324b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 63255db8440cSStefan Haberland } else 63265db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 63275db8440cSStefan Haberland 6328b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 6329a521b048SStefan Haberland cuir->message_id, lpum); 6330b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 6331b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 6332b179b037SStefan Haberland cuir->message_id); 6333b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 6334b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 63355db8440cSStefan Haberland } 63365db8440cSStefan Haberland 63379e12e54cSJan Höppner static void dasd_eckd_oos_resume(struct dasd_device *device) 63389e12e54cSJan Höppner { 63399e12e54cSJan Höppner struct dasd_eckd_private *private = device->private; 63409e12e54cSJan Höppner struct alias_pav_group *pavgroup, *tempgroup; 63419e12e54cSJan Höppner struct dasd_device *dev, *n; 63429e12e54cSJan Höppner unsigned long flags; 63439e12e54cSJan Höppner 63449e12e54cSJan Höppner spin_lock_irqsave(&private->lcu->lock, flags); 63459e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 63469e12e54cSJan Höppner alias_list) { 63479e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 63489e12e54cSJan Höppner dasd_generic_space_avail(dev); 63499e12e54cSJan Höppner } 63509e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 63519e12e54cSJan Höppner alias_list) { 63529e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 63539e12e54cSJan Höppner dasd_generic_space_avail(dev); 63549e12e54cSJan Höppner } 63559e12e54cSJan Höppner /* devices in PAV groups */ 63569e12e54cSJan Höppner list_for_each_entry_safe(pavgroup, tempgroup, 63579e12e54cSJan Höppner &private->lcu->grouplist, 63589e12e54cSJan Höppner group) { 63599e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->baselist, 63609e12e54cSJan Höppner alias_list) { 63619e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 63629e12e54cSJan Höppner dasd_generic_space_avail(dev); 63639e12e54cSJan Höppner } 63649e12e54cSJan Höppner list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 63659e12e54cSJan Höppner alias_list) { 63669e12e54cSJan Höppner if (dev->stopped & DASD_STOPPED_NOSPC) 63679e12e54cSJan Höppner dasd_generic_space_avail(dev); 63689e12e54cSJan Höppner } 63699e12e54cSJan Höppner } 63709e12e54cSJan Höppner spin_unlock_irqrestore(&private->lcu->lock, flags); 63719e12e54cSJan Höppner } 63729e12e54cSJan Höppner 63739e12e54cSJan Höppner static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, 63749e12e54cSJan Höppner __u8 lpum) 63759e12e54cSJan Höppner { 63769e12e54cSJan Höppner struct dasd_oos_message *oos = messages; 63779e12e54cSJan Höppner 63789e12e54cSJan Höppner switch (oos->code) { 63799e12e54cSJan Höppner case REPO_WARN: 63809e12e54cSJan Höppner case POOL_WARN: 63819e12e54cSJan Höppner dev_warn(&device->cdev->dev, 63829e12e54cSJan Höppner "Extent pool usage has reached a critical value\n"); 63839e12e54cSJan Höppner dasd_eckd_oos_resume(device); 63849e12e54cSJan Höppner break; 63859e12e54cSJan Höppner case REPO_EXHAUST: 63869e12e54cSJan Höppner case POOL_EXHAUST: 63879e12e54cSJan Höppner dev_warn(&device->cdev->dev, 63889e12e54cSJan Höppner "Extent pool is exhausted\n"); 63899e12e54cSJan Höppner break; 63909e12e54cSJan Höppner case REPO_RELIEVE: 63919e12e54cSJan Höppner case POOL_RELIEVE: 63929e12e54cSJan Höppner dev_info(&device->cdev->dev, 63939e12e54cSJan Höppner "Extent pool physical space constraint has been relieved\n"); 63949e12e54cSJan Höppner break; 63959e12e54cSJan Höppner } 63969e12e54cSJan Höppner 63979e12e54cSJan Höppner /* In any case, update related data */ 63989e12e54cSJan Höppner dasd_eckd_read_ext_pool_info(device); 63999e12e54cSJan Höppner 64009e12e54cSJan Höppner /* to make sure there is no attention left schedule work again */ 64019e12e54cSJan Höppner device->discipline->check_attention(device, lpum); 64029e12e54cSJan Höppner } 64039e12e54cSJan Höppner 64045db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 64055db8440cSStefan Haberland { 64065db8440cSStefan Haberland struct check_attention_work_data *data; 64075db8440cSStefan Haberland struct dasd_rssd_messages *messages; 64085db8440cSStefan Haberland struct dasd_device *device; 64095db8440cSStefan Haberland int rc; 64105db8440cSStefan Haberland 64115db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 64125db8440cSStefan Haberland device = data->device; 64135db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 64145db8440cSStefan Haberland if (!messages) { 64155db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 64165db8440cSStefan Haberland "Could not allocate attention message buffer"); 64175db8440cSStefan Haberland goto out; 64185db8440cSStefan Haberland } 64195db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 64205db8440cSStefan Haberland if (rc) 64215db8440cSStefan Haberland goto out; 64229e12e54cSJan Höppner 64235db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 64245db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 64255db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 64269e12e54cSJan Höppner if (messages->length == ATTENTION_LENGTH_OOS && 64279e12e54cSJan Höppner messages->format == ATTENTION_FORMAT_OOS) 64289e12e54cSJan Höppner dasd_eckd_handle_oos(device, messages, data->lpum); 64299e12e54cSJan Höppner 64305db8440cSStefan Haberland out: 64315db8440cSStefan Haberland dasd_put_device(device); 64325db8440cSStefan Haberland kfree(messages); 64335db8440cSStefan Haberland kfree(data); 64345db8440cSStefan Haberland } 64355db8440cSStefan Haberland 64365db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 64375db8440cSStefan Haberland { 64385db8440cSStefan Haberland struct check_attention_work_data *data; 64395db8440cSStefan Haberland 64405db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 64415db8440cSStefan Haberland if (!data) 64425db8440cSStefan Haberland return -ENOMEM; 64435db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 64445db8440cSStefan Haberland dasd_get_device(device); 64455db8440cSStefan Haberland data->device = device; 64465db8440cSStefan Haberland data->lpum = lpum; 64475db8440cSStefan Haberland schedule_work(&data->worker); 64485db8440cSStefan Haberland return 0; 64495db8440cSStefan Haberland } 64505db8440cSStefan Haberland 6451a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6452a521b048SStefan Haberland { 6453a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6454a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6455a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6456a521b048SStefan Haberland dev_err(&device->cdev->dev, 6457a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6458a521b048SStefan Haberland lpum); 6459a521b048SStefan Haberland return 1; 6460a521b048SStefan Haberland } 6461a521b048SStefan Haberland return 0; 6462a521b048SStefan Haberland } 6463a521b048SStefan Haberland 6464a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6465a521b048SStefan Haberland { 6466a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6467a521b048SStefan Haberland 6468a521b048SStefan Haberland dev_err(&device->cdev->dev, 6469a521b048SStefan Haberland "High Performance FICON disabled\n"); 6470a521b048SStefan Haberland private->fcx_max_data = 0; 6471a521b048SStefan Haberland } 6472a521b048SStefan Haberland 6473a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6474a521b048SStefan Haberland { 6475a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6476a521b048SStefan Haberland 6477a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6478a521b048SStefan Haberland } 6479a521b048SStefan Haberland 6480a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6481a521b048SStefan Haberland struct irb *irb) 6482a521b048SStefan Haberland { 6483a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6484a521b048SStefan Haberland 6485a521b048SStefan Haberland if (!private->fcx_max_data) { 6486a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6487a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6488a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6489a521b048SStefan Haberland return; 6490a521b048SStefan Haberland } 6491a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6492a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6493a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6494a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6495a521b048SStefan Haberland return; 6496a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6497a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6498a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6499a521b048SStefan Haberland } 6500a521b048SStefan Haberland /* 6501a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6502a521b048SStefan Haberland * requeue of existing requests 6503a521b048SStefan Haberland */ 6504a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6505a521b048SStefan Haberland dasd_schedule_requeue(device); 6506a521b048SStefan Haberland } 6507a521b048SStefan Haberland 6508a0610a8aSJan Höppner /* 6509a0610a8aSJan Höppner * Initialize block layer request queue. 6510a0610a8aSJan Höppner */ 6511a0610a8aSJan Höppner static void dasd_eckd_setup_blk_queue(struct dasd_block *block) 6512a0610a8aSJan Höppner { 6513a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 6514a0610a8aSJan Höppner struct request_queue *q = block->request_queue; 6515a0610a8aSJan Höppner struct dasd_device *device = block->base; 65167e64db15SJan Höppner struct dasd_eckd_private *private; 65177e64db15SJan Höppner unsigned int max_discard_sectors; 65187e64db15SJan Höppner unsigned int max_bytes; 65197e64db15SJan Höppner unsigned int ext_bytes; /* Extent Size in Bytes */ 65207e64db15SJan Höppner int recs_per_trk; 65217e64db15SJan Höppner int trks_per_cyl; 65227e64db15SJan Höppner int ext_limit; 65237e64db15SJan Höppner int ext_size; /* Extent Size in Cylinders */ 6524a0610a8aSJan Höppner int max; 6525a0610a8aSJan Höppner 65267e64db15SJan Höppner private = device->private; 65277e64db15SJan Höppner trks_per_cyl = private->rdc_data.trk_per_cyl; 65287e64db15SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, logical_block_size); 65297e64db15SJan Höppner 6530a0610a8aSJan Höppner if (device->features & DASD_FEATURE_USERAW) { 6531a0610a8aSJan Höppner /* 6532a0610a8aSJan Höppner * the max_blocks value for raw_track access is 256 6533a0610a8aSJan Höppner * it is higher than the native ECKD value because we 6534a0610a8aSJan Höppner * only need one ccw per track 6535a0610a8aSJan Höppner * so the max_hw_sectors are 6536a0610a8aSJan Höppner * 2048 x 512B = 1024kB = 16 tracks 6537a0610a8aSJan Höppner */ 6538a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; 6539a0610a8aSJan Höppner } else { 6540a0610a8aSJan Höppner max = DASD_ECKD_MAX_BLOCKS << block->s2b_shift; 6541a0610a8aSJan Höppner } 6542a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 6543a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 6544a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 6545a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 6546a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 6547a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 6548a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 6549a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 65507e64db15SJan Höppner 65517e64db15SJan Höppner if (dasd_eckd_is_ese(device)) { 65527e64db15SJan Höppner /* 65537e64db15SJan Höppner * Depending on the extent size, up to UINT_MAX bytes can be 65547e64db15SJan Höppner * accepted. However, neither DASD_ECKD_RAS_EXTS_MAX nor the 65557e64db15SJan Höppner * device limits should be exceeded. 65567e64db15SJan Höppner */ 65577e64db15SJan Höppner ext_size = dasd_eckd_ext_size(device); 65587e64db15SJan Höppner ext_limit = min(private->real_cyl / ext_size, DASD_ECKD_RAS_EXTS_MAX); 65597e64db15SJan Höppner ext_bytes = ext_size * trks_per_cyl * recs_per_trk * 65607e64db15SJan Höppner logical_block_size; 65617e64db15SJan Höppner max_bytes = UINT_MAX - (UINT_MAX % ext_bytes); 65627e64db15SJan Höppner if (max_bytes / ext_bytes > ext_limit) 65637e64db15SJan Höppner max_bytes = ext_bytes * ext_limit; 65647e64db15SJan Höppner 65657e64db15SJan Höppner max_discard_sectors = max_bytes / 512; 65667e64db15SJan Höppner 65677e64db15SJan Höppner blk_queue_max_discard_sectors(q, max_discard_sectors); 65687e64db15SJan Höppner blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); 65697e64db15SJan Höppner q->limits.discard_granularity = ext_bytes; 65707e64db15SJan Höppner q->limits.discard_alignment = ext_bytes; 65717e64db15SJan Höppner } 6572a0610a8aSJan Höppner } 6573a0610a8aSJan Höppner 6574d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 65753bda058bSSebastian Ott .driver = { 6576d41dd122SStefan Haberland .name = "dasd-eckd", 6577d41dd122SStefan Haberland .owner = THIS_MODULE, 65783bda058bSSebastian Ott }, 6579d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6580d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6581d41dd122SStefan Haberland .remove = dasd_generic_remove, 6582d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6583d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6584d41dd122SStefan Haberland .notify = dasd_generic_notify, 6585a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 65864679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6587d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 6588d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 6589d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 6590a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6591420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6592d41dd122SStefan Haberland }; 6593f3eb5384SStefan Weinhuber 65941da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 65951da177e4SLinus Torvalds .owner = THIS_MODULE, 65961da177e4SLinus Torvalds .name = "ECKD", 65971da177e4SLinus Torvalds .ebcname = "ECKD", 65981da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 65998e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 66001da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6601a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 6602d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 66038e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6604daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 6605a0610a8aSJan Höppner .setup_blk_queue = dasd_eckd_setup_blk_queue, 66061da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 66071da177e4SLinus Torvalds .start_IO = dasd_start_IO, 66081da177e4SLinus Torvalds .term_IO = dasd_term_IO, 66098e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 66101da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 66118fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 66121da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 66131da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 66145a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 66158e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 66168e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 66171da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6618fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 66191da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 66201107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6621d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 6622d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 6623501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 66242dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6625f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 66265db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 66275a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 66285a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6629a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6630a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6631a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6632a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6633c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6634c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6635c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6636c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 663791dc4a19SJan Höppner .release_space = dasd_eckd_release_space, 6638c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6639c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6640c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6641c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6642c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 66439e12e54cSJan Höppner .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, 66445e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 66455e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 66461da177e4SLinus Torvalds }; 66471da177e4SLinus Torvalds 66481da177e4SLinus Torvalds static int __init 66491da177e4SLinus Torvalds dasd_eckd_init(void) 66501da177e4SLinus Torvalds { 6651736e6ea0SSebastian Ott int ret; 6652736e6ea0SSebastian Ott 66531da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6654f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6655f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6656f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6657f932bceaSStefan Weinhuber return -ENOMEM; 66589e12e54cSJan Höppner dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), 66599e12e54cSJan Höppner GFP_KERNEL | GFP_DMA); 66609e12e54cSJan Höppner if (!dasd_vol_info_req) 66619e12e54cSJan Höppner return -ENOMEM; 6662a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 6663a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6664a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 6665a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 66669e12e54cSJan Höppner kfree(dasd_vol_info_req); 6667a4d26c6aSStefan Weinhuber return -ENOMEM; 6668a4d26c6aSStefan Weinhuber } 6669558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6670558b9ef0SStefan Weinhuber if (!rawpadpage) { 6671558b9ef0SStefan Weinhuber kfree(path_verification_worker); 6672558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 66739e12e54cSJan Höppner kfree(dasd_vol_info_req); 6674558b9ef0SStefan Weinhuber return -ENOMEM; 6675558b9ef0SStefan Weinhuber } 6676736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6677736e6ea0SSebastian Ott if (!ret) 6678736e6ea0SSebastian Ott wait_for_device_probe(); 6679a4d26c6aSStefan Weinhuber else { 6680a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6681f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 66829e12e54cSJan Höppner kfree(dasd_vol_info_req); 6683558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6684a4d26c6aSStefan Weinhuber } 6685736e6ea0SSebastian Ott return ret; 66861da177e4SLinus Torvalds } 66871da177e4SLinus Torvalds 66881da177e4SLinus Torvalds static void __exit 66891da177e4SLinus Torvalds dasd_eckd_cleanup(void) 66901da177e4SLinus Torvalds { 66911da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6692a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6693f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6694558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 66951da177e4SLinus Torvalds } 66961da177e4SLinus Torvalds 66971da177e4SLinus Torvalds module_init(dasd_eckd_init); 66981da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6699