11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * File...........: linux/drivers/s390/block/dasd_eckd.c 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 13fc19f381SStefan Haberland #define KMSG_COMPONENT "dasd" 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> 211da177e4SLinus Torvalds #include <linux/init.h> 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <asm/debug.h> 241da177e4SLinus Torvalds #include <asm/idals.h> 251da177e4SLinus Torvalds #include <asm/ebcdic.h> 261da177e4SLinus Torvalds #include <asm/io.h> 271da177e4SLinus Torvalds #include <asm/todclk.h> 281da177e4SLinus Torvalds #include <asm/uaccess.h> 2940545573SHorst Hummel #include <asm/cio.h> 301da177e4SLinus Torvalds #include <asm/ccwdev.h> 31f3eb5384SStefan Weinhuber #include <asm/itcw.h> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #include "dasd_int.h" 341da177e4SLinus Torvalds #include "dasd_eckd.h" 35f3eb5384SStefan Weinhuber #include "../cio/chsc.h" 36f3eb5384SStefan Weinhuber 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #ifdef PRINTK_HEADER 391da177e4SLinus Torvalds #undef PRINTK_HEADER 401da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 411da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 441da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 451da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 461da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 471da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 481da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 491da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 501da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 511da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 521da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 531da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 541da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 551da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 621da177e4SLinus Torvalds * dasd_eckd_probe */ 631da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 64d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 65d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 66d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, 67d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 68d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 69d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 70d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 71d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 72d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 73d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 741da177e4SLinus Torvalds { /* end of list */ }, 751da177e4SLinus Torvalds }; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 821da177e4SLinus Torvalds * the other detection code is gone */ 831da177e4SLinus Torvalds static int 841da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 851da177e4SLinus Torvalds { 861da177e4SLinus Torvalds int ret; 871da177e4SLinus Torvalds 8840545573SHorst Hummel /* set ECKD specific ccw-device options */ 8940545573SHorst Hummel ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); 9040545573SHorst Hummel if (ret) { 91fc19f381SStefan Haberland DBF_EVENT(DBF_WARNING, 9240545573SHorst Hummel "dasd_eckd_probe: could not set ccw-device options " 932a0217d5SKay Sievers "for %s\n", dev_name(&cdev->dev)); 941da177e4SLinus Torvalds return ret; 9540545573SHorst Hummel } 9640545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 9740545573SHorst Hummel return ret; 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds static int 1011da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1021da177e4SLinus Torvalds { 1031da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1071da177e4SLinus Torvalds #define LABEL_SIZE 140 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds static inline unsigned int 1101da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1111da177e4SLinus Torvalds { 1121da177e4SLinus Torvalds int rem = no % mult; 1131da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds static inline unsigned int 1171da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1181da177e4SLinus Torvalds { 1191da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds 1224d284cacSHeiko Carstens static unsigned int 1231da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1241da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1251da177e4SLinus Torvalds { 1261da177e4SLinus Torvalds int dn, kn; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds switch (rdc->dev_type) { 1291da177e4SLinus Torvalds case 0x3380: 1301da177e4SLinus Torvalds if (kl) 1311da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1321da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1331da177e4SLinus Torvalds else 1341da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1351da177e4SLinus Torvalds case 0x3390: 1361da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1371da177e4SLinus Torvalds if (kl) { 1381da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1391da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1401da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1411da177e4SLinus Torvalds } else 1421da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1431da177e4SLinus Torvalds case 0x9345: 1441da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1451da177e4SLinus Torvalds if (kl) { 1461da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1471da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1481da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1491da177e4SLinus Torvalds } else 1501da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds return 0; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 155b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 156b44b0ab3SStefan Weinhuber { 157b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 158b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 159b44b0ab3SStefan Weinhuber geo->head <<= 4; 160b44b0ab3SStefan Weinhuber geo->head |= head; 161b44b0ab3SStefan Weinhuber } 162b44b0ab3SStefan Weinhuber 1634d284cacSHeiko Carstens static int 1641da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1651da177e4SLinus Torvalds struct DE_eckd_data *data, 1661da177e4SLinus Torvalds struct dasd_device *device) 1671da177e4SLinus Torvalds { 1681da177e4SLinus Torvalds struct dasd_eckd_private *private; 169d54853efSMartin Schwidefsky int rc; 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 172d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 173d54853efSMartin Schwidefsky return 0; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 1761da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 1771da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 1781da177e4SLinus Torvalds 179d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 180d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 181d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 182d54853efSMartin Schwidefsky rc = 0; 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 1851da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 186d54853efSMartin Schwidefsky return rc; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 1894d284cacSHeiko Carstens static int 190b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 191b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 1921da177e4SLinus Torvalds { 1931da177e4SLinus Torvalds struct dasd_eckd_private *private; 194b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 195b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 196d54853efSMartin Schwidefsky int rc = 0; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2011da177e4SLinus Torvalds ccw->flags = 0; 2021da177e4SLinus Torvalds ccw->count = 16; 2031da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2061da177e4SLinus Torvalds switch (cmd) { 2071da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2081da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2091da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2101da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2111da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2121da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2131da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2141da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2151da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2161da177e4SLinus Torvalds data->mask.perm = 0x1; 2171da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2181da177e4SLinus Torvalds break; 2191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2201da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2211da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2221da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2231da177e4SLinus Torvalds data->mask.perm = 0x02; 2241da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 225d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2261da177e4SLinus Torvalds break; 2271da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2281da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2291da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 230d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2311da177e4SLinus Torvalds break; 2321da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2331da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2341da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2351da177e4SLinus Torvalds data->mask.perm = 0x3; 2361da177e4SLinus Torvalds data->mask.auth = 0x1; 2371da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 238d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2391da177e4SLinus Torvalds break; 2401da177e4SLinus Torvalds default: 241fc19f381SStefan Haberland dev_err(&device->cdev->dev, 242fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2431da177e4SLinus Torvalds break; 2441da177e4SLinus Torvalds } 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2491da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2501da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2511da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2521da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2531da177e4SLinus Torvalds 254b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 255b44b0ab3SStefan Weinhuber begcyl = trk / heads; 256b44b0ab3SStefan Weinhuber beghead = trk % heads; 257b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 258b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2611da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2621da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2631da177e4SLinus Torvalds 264b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 265b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 2661da177e4SLinus Torvalds else 267b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 2681da177e4SLinus Torvalds } 2691da177e4SLinus Torvalds 270b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 271b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 272d54853efSMartin Schwidefsky return rc; 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 2758e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 2768e09f215SStefan Weinhuber struct dasd_device *device) 2778e09f215SStefan Weinhuber { 2788e09f215SStefan Weinhuber struct dasd_eckd_private *private; 2798e09f215SStefan Weinhuber int rc; 2808e09f215SStefan Weinhuber 2818e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 2828e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 2838e09f215SStefan Weinhuber return 0; 2848e09f215SStefan Weinhuber 2858e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 286f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 287f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 2888e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 2898e09f215SStefan Weinhuber 290f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 2918e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 2928e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 2938e09f215SStefan Weinhuber rc = 0; 2948e09f215SStefan Weinhuber return rc; 2958e09f215SStefan Weinhuber } 2968e09f215SStefan Weinhuber 297f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 298f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 299f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 300f3eb5384SStefan Weinhuber unsigned int tlf) 301f3eb5384SStefan Weinhuber { 302f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 303f3eb5384SStefan Weinhuber int sector; 304f3eb5384SStefan Weinhuber int dn, d; 305f3eb5384SStefan Weinhuber 306f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 307f3eb5384SStefan Weinhuber 308f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 309f3eb5384SStefan Weinhuber sector = 0; 310f3eb5384SStefan Weinhuber if (rec_on_trk) { 311f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 312f3eb5384SStefan Weinhuber case 0x3390: 313f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 314f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 315f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 316f3eb5384SStefan Weinhuber break; 317f3eb5384SStefan Weinhuber case 0x3380: 318f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 319f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 320f3eb5384SStefan Weinhuber break; 321f3eb5384SStefan Weinhuber } 322f3eb5384SStefan Weinhuber } 323f3eb5384SStefan Weinhuber data->sector = sector; 324f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 325f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 326f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 327f3eb5384SStefan Weinhuber */ 328f3eb5384SStefan Weinhuber data->count = count; 329f3eb5384SStefan Weinhuber switch (cmd) { 330f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 331f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 332f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 333f3eb5384SStefan Weinhuber break; 334f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 335f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 336f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 337f3eb5384SStefan Weinhuber break; 338f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 339f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 340f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 341f3eb5384SStefan Weinhuber data->count++; 342f3eb5384SStefan Weinhuber break; 343f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 344f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 345f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 346f3eb5384SStefan Weinhuber data->count++; 347f3eb5384SStefan Weinhuber break; 348f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 349f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 350f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 351f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 352f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 353f3eb5384SStefan Weinhuber data->length = reclen; 354f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 355f3eb5384SStefan Weinhuber break; 356f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 357f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 358f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 359f3eb5384SStefan Weinhuber data->length = reclen; 360f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 361f3eb5384SStefan Weinhuber break; 362f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 363f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 364f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 365f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 366f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 367f3eb5384SStefan Weinhuber break; 368f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 369f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 370f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 371f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 372f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 373f3eb5384SStefan Weinhuber data->length = reclen; 374f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 375f3eb5384SStefan Weinhuber break; 376f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 377f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 378f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 379f3eb5384SStefan Weinhuber data->length = reclen; 380f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 381f3eb5384SStefan Weinhuber break; 382f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 383f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 384f3eb5384SStefan Weinhuber break; 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 386f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 387f3eb5384SStefan Weinhuber data->length = tlf; 388f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 389f3eb5384SStefan Weinhuber break; 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 391f3eb5384SStefan Weinhuber data->length = reclen; 392f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 393f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 394f3eb5384SStefan Weinhuber break; 395f3eb5384SStefan Weinhuber default: 396f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 397f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 398f3eb5384SStefan Weinhuber BUG(); 399f3eb5384SStefan Weinhuber } 400f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 401f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 402f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 403f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 404f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 405f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 406f3eb5384SStefan Weinhuber } 407f3eb5384SStefan Weinhuber 408f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 409b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 410f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 411f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 412f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4138e09f215SStefan Weinhuber { 4148e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 415f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 416f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 417b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 418b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4198e09f215SStefan Weinhuber int rc = 0; 4208e09f215SStefan Weinhuber 4218e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4228e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 423f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 424f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4258e09f215SStefan Weinhuber 4268e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4278e09f215SStefan Weinhuber ccw->flags = 0; 4288e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4298e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4308e09f215SStefan Weinhuber 4318e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 4328e09f215SStefan Weinhuber /* prefix data */ 433f3eb5384SStefan Weinhuber if (format > 1) { 434f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 435f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 436f3eb5384SStefan Weinhuber BUG(); 437f3eb5384SStefan Weinhuber return -EINVAL; 438f3eb5384SStefan Weinhuber } 439f3eb5384SStefan Weinhuber pfxdata->format = format; 4404abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 4414abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 442f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 4438e09f215SStefan Weinhuber 4448e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4458e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 4468e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 4478e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 4488e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 4498e09f215SStefan Weinhuber } 4508e09f215SStefan Weinhuber 4518e09f215SStefan Weinhuber /* define extend data (mostly)*/ 4528e09f215SStefan Weinhuber switch (cmd) { 4538e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 4548e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 4558e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 4568e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 4578e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 4588e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 4598e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 4608e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 4618e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 462f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 463f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 464f3eb5384SStefan Weinhuber break; 465f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 466f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 467f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 468f3eb5384SStefan Weinhuber dedata->blk_size = 0; 4698e09f215SStefan Weinhuber break; 4708e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 4718e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 4728e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 4738e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 474f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 475f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4768e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 4778e09f215SStefan Weinhuber break; 4788e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 4798e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 480f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 4818e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 4828e09f215SStefan Weinhuber break; 4838e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 4848e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 4858e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 486f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 487f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 488f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 489f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 490f3eb5384SStefan Weinhuber break; 491f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 492f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 493f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 494f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 4958e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 4968e09f215SStefan Weinhuber break; 4978e09f215SStefan Weinhuber default: 498f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 499f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 500f3eb5384SStefan Weinhuber BUG(); 501f3eb5384SStefan Weinhuber return -EINVAL; 5028e09f215SStefan Weinhuber } 5038e09f215SStefan Weinhuber 504f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5058e09f215SStefan Weinhuber 5068e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5078e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5088e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5098e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 510f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5118e09f215SStefan Weinhuber 512b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 513b44b0ab3SStefan Weinhuber begcyl = trk / heads; 514b44b0ab3SStefan Weinhuber beghead = trk % heads; 515b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 516b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5178e09f215SStefan Weinhuber 5188e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 519f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 520f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5218e09f215SStefan Weinhuber 522b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 523b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5248e09f215SStefan Weinhuber else 525b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5268e09f215SStefan Weinhuber } 5278e09f215SStefan Weinhuber 528f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 529f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 530f3eb5384SStefan Weinhuber 531f3eb5384SStefan Weinhuber if (format == 1) { 532f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 533f3eb5384SStefan Weinhuber basedev, blksize, tlf); 534f3eb5384SStefan Weinhuber } 535f3eb5384SStefan Weinhuber 5368e09f215SStefan Weinhuber return rc; 5378e09f215SStefan Weinhuber } 5388e09f215SStefan Weinhuber 539f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 540f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 541f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 542f3eb5384SStefan Weinhuber { 543f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 544f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 545f3eb5384SStefan Weinhuber } 546f3eb5384SStefan Weinhuber 5474d284cacSHeiko Carstens static void 548b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 549b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5501da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5511da177e4SLinus Torvalds { 5521da177e4SLinus Torvalds struct dasd_eckd_private *private; 5531da177e4SLinus Torvalds int sector; 5541da177e4SLinus Torvalds int dn, d; 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5591da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5601da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5631da177e4SLinus Torvalds ccw->flags = 0; 5641da177e4SLinus Torvalds ccw->count = 16; 5651da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5681da177e4SLinus Torvalds sector = 0; 5691da177e4SLinus Torvalds if (rec_on_trk) { 5701da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5711da177e4SLinus Torvalds case 0x3390: 5721da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5731da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 5741da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 5751da177e4SLinus Torvalds break; 5761da177e4SLinus Torvalds case 0x3380: 5771da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 5781da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 5791da177e4SLinus Torvalds break; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds data->sector = sector; 5831da177e4SLinus Torvalds data->count = no_rec; 5841da177e4SLinus Torvalds switch (cmd) { 5851da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5861da177e4SLinus Torvalds data->operation.orientation = 0x3; 5871da177e4SLinus Torvalds data->operation.operation = 0x03; 5881da177e4SLinus Torvalds break; 5891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5901da177e4SLinus Torvalds data->operation.orientation = 0x3; 5911da177e4SLinus Torvalds data->operation.operation = 0x16; 5921da177e4SLinus Torvalds break; 5931da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 5941da177e4SLinus Torvalds data->operation.orientation = 0x1; 5951da177e4SLinus Torvalds data->operation.operation = 0x03; 5961da177e4SLinus Torvalds data->count++; 5971da177e4SLinus Torvalds break; 5981da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 5991da177e4SLinus Torvalds data->operation.orientation = 0x3; 6001da177e4SLinus Torvalds data->operation.operation = 0x16; 6011da177e4SLinus Torvalds data->count++; 6021da177e4SLinus Torvalds break; 6031da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6041da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6051da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6061da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6071da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6081da177e4SLinus Torvalds data->length = reclen; 6091da177e4SLinus Torvalds data->operation.operation = 0x01; 6101da177e4SLinus Torvalds break; 6111da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6121da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6131da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6141da177e4SLinus Torvalds data->length = reclen; 6151da177e4SLinus Torvalds data->operation.operation = 0x03; 6161da177e4SLinus Torvalds break; 6171da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6181da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6191da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6201da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6211da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6221da177e4SLinus Torvalds data->length = reclen; 6231da177e4SLinus Torvalds data->operation.operation = 0x06; 6241da177e4SLinus Torvalds break; 6251da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6261da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6271da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6281da177e4SLinus Torvalds data->length = reclen; 6291da177e4SLinus Torvalds data->operation.operation = 0x16; 6301da177e4SLinus Torvalds break; 6311da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6321da177e4SLinus Torvalds data->operation.operation = 0x06; 6331da177e4SLinus Torvalds break; 6341da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6351da177e4SLinus Torvalds data->length = reclen; 6361da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6371da177e4SLinus Torvalds data->operation.operation = 0x0b; 6381da177e4SLinus Torvalds break; 6391da177e4SLinus Torvalds default: 640fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 641fc19f381SStefan Haberland "opcode 0x%x", cmd); 6421da177e4SLinus Torvalds } 643b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 644b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 645b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 646b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 647b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6481da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds /* 6521da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6531da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6541da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6551da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6561da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6571da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6581da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6591da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6601da177e4SLinus Torvalds */ 6611da177e4SLinus Torvalds static inline int 6621da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6631da177e4SLinus Torvalds { 6641da177e4SLinus Torvalds if (recid < 3) 6651da177e4SLinus Torvalds return 1; 6661da177e4SLinus Torvalds if (recid < blk_per_trk) 6671da177e4SLinus Torvalds return 0; 6681da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6691da177e4SLinus Torvalds return 1; 6701da177e4SLinus Torvalds return 0; 6711da177e4SLinus Torvalds } 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds /* 6741da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 6751da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 6761da177e4SLinus Torvalds * for the recid. 6771da177e4SLinus Torvalds */ 6781da177e4SLinus Torvalds static inline int 6791da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 6801da177e4SLinus Torvalds { 6811da177e4SLinus Torvalds if (recid < 3) 6821da177e4SLinus Torvalds return sizes_trk0[recid]; 6831da177e4SLinus Torvalds return LABEL_SIZE; 6841da177e4SLinus Torvalds } 6851da177e4SLinus Torvalds 6863d052595SHorst Hummel /* 6873d052595SHorst Hummel * Generate device unique id that specifies the physical device. 6883d052595SHorst Hummel */ 6894abb08c2SStefan Weinhuber static int dasd_eckd_generate_uid(struct dasd_device *device, 6904abb08c2SStefan Weinhuber struct dasd_uid *uid) 6913d052595SHorst Hummel { 6923d052595SHorst Hummel struct dasd_eckd_private *private; 6934abb08c2SStefan Weinhuber int count; 6943d052595SHorst Hummel 6953d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 6963d052595SHorst Hummel if (!private) 6973d052595SHorst Hummel return -ENODEV; 6984abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 6993d052595SHorst Hummel return -ENODEV; 7003d052595SHorst Hummel 7013d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7024abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7033d052595SHorst Hummel sizeof(uid->vendor) - 1); 7043d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7054abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7063d052595SHorst Hummel sizeof(uid->serial) - 1); 7073d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7084abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 7094abb08c2SStefan Weinhuber uid->real_unit_addr = private->ned->unit_addr;; 7104abb08c2SStefan Weinhuber if (private->sneq) { 7114abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7128e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7134abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7148e09f215SStefan Weinhuber } else { 7158e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7168e09f215SStefan Weinhuber } 7174abb08c2SStefan Weinhuber if (private->vdsneq) { 7184abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7194abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7204abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7214abb08c2SStefan Weinhuber } 7224abb08c2SStefan Weinhuber } 7233d052595SHorst Hummel return 0; 7243d052595SHorst Hummel } 7253d052595SHorst Hummel 726763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 72717283b56SCornelia Huck void *rcd_buffer, 72817283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 72917283b56SCornelia Huck { 73017283b56SCornelia Huck struct dasd_ccw_req *cqr; 73117283b56SCornelia Huck struct ccw1 *ccw; 73217283b56SCornelia Huck 73317283b56SCornelia Huck cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device); 73417283b56SCornelia Huck 73517283b56SCornelia Huck if (IS_ERR(cqr)) { 736fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 73717283b56SCornelia Huck "Could not allocate RCD request"); 73817283b56SCornelia Huck return cqr; 73917283b56SCornelia Huck } 74017283b56SCornelia Huck 74117283b56SCornelia Huck ccw = cqr->cpaddr; 74217283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 74317283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 74417283b56SCornelia Huck ccw->count = ciw->count; 74517283b56SCornelia Huck 7468e09f215SStefan Weinhuber cqr->startdev = device; 7478e09f215SStefan Weinhuber cqr->memdev = device; 7488e09f215SStefan Weinhuber cqr->block = NULL; 74917283b56SCornelia Huck cqr->expires = 10*HZ; 75017283b56SCornelia Huck cqr->lpm = lpm; 75117283b56SCornelia Huck clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 75217283b56SCornelia Huck cqr->retries = 2; 75317283b56SCornelia Huck cqr->buildclk = get_clock(); 75417283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 75517283b56SCornelia Huck return cqr; 75617283b56SCornelia Huck } 75717283b56SCornelia Huck 75817283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 75917283b56SCornelia Huck void **rcd_buffer, 76017283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 76117283b56SCornelia Huck { 76217283b56SCornelia Huck struct ciw *ciw; 76317283b56SCornelia Huck char *rcd_buf = NULL; 76417283b56SCornelia Huck int ret; 76517283b56SCornelia Huck struct dasd_ccw_req *cqr; 76617283b56SCornelia Huck 76717283b56SCornelia Huck /* 76817283b56SCornelia Huck * scan for RCD command in extended SenseID data 76917283b56SCornelia Huck */ 77017283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 77117283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 77217283b56SCornelia Huck ret = -EOPNOTSUPP; 77317283b56SCornelia Huck goto out_error; 77417283b56SCornelia Huck } 77517283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 77617283b56SCornelia Huck if (!rcd_buf) { 77717283b56SCornelia Huck ret = -ENOMEM; 77817283b56SCornelia Huck goto out_error; 77917283b56SCornelia Huck } 7804abb08c2SStefan Weinhuber 7814abb08c2SStefan Weinhuber /* 7824abb08c2SStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 7834abb08c2SStefan Weinhuber * support for virtual device SNEQ 7844abb08c2SStefan Weinhuber */ 7854abb08c2SStefan Weinhuber rcd_buf[0] = 0xE5; 7864abb08c2SStefan Weinhuber rcd_buf[1] = 0xF1; 7874abb08c2SStefan Weinhuber rcd_buf[2] = 0x4B; 7884abb08c2SStefan Weinhuber rcd_buf[3] = 0xF0; 78917283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 79017283b56SCornelia Huck if (IS_ERR(cqr)) { 79117283b56SCornelia Huck ret = PTR_ERR(cqr); 79217283b56SCornelia Huck goto out_error; 79317283b56SCornelia Huck } 79417283b56SCornelia Huck ret = dasd_sleep_on(cqr); 79517283b56SCornelia Huck /* 79617283b56SCornelia Huck * on success we update the user input parms 79717283b56SCornelia Huck */ 7988e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 79917283b56SCornelia Huck if (ret) 80017283b56SCornelia Huck goto out_error; 80117283b56SCornelia Huck 80217283b56SCornelia Huck *rcd_buffer_size = ciw->count; 80317283b56SCornelia Huck *rcd_buffer = rcd_buf; 80417283b56SCornelia Huck return 0; 80517283b56SCornelia Huck out_error: 80617283b56SCornelia Huck kfree(rcd_buf); 80717283b56SCornelia Huck *rcd_buffer = NULL; 80817283b56SCornelia Huck *rcd_buffer_size = 0; 80917283b56SCornelia Huck return ret; 81017283b56SCornelia Huck } 81117283b56SCornelia Huck 8124abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 8134abb08c2SStefan Weinhuber { 8144abb08c2SStefan Weinhuber 8154abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 8164abb08c2SStefan Weinhuber int i, count; 8174abb08c2SStefan Weinhuber 8184abb08c2SStefan Weinhuber private->ned = NULL; 8194abb08c2SStefan Weinhuber private->sneq = NULL; 8204abb08c2SStefan Weinhuber private->vdsneq = NULL; 8214abb08c2SStefan Weinhuber private->gneq = NULL; 8224abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 8234abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 8244abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8254abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 8264abb08c2SStefan Weinhuber private->sneq = sneq; 8274abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 8284abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 8294abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 8304abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 8314abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 8324abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 8334abb08c2SStefan Weinhuber sneq++; 8344abb08c2SStefan Weinhuber } 8354abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 8364abb08c2SStefan Weinhuber private->ned = NULL; 8374abb08c2SStefan Weinhuber private->sneq = NULL; 8384abb08c2SStefan Weinhuber private->vdsneq = NULL; 8394abb08c2SStefan Weinhuber private->gneq = NULL; 8404abb08c2SStefan Weinhuber return -EINVAL; 8414abb08c2SStefan Weinhuber } 8424abb08c2SStefan Weinhuber return 0; 8434abb08c2SStefan Weinhuber 8444abb08c2SStefan Weinhuber }; 8454abb08c2SStefan Weinhuber 8464abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 8474abb08c2SStefan Weinhuber { 8484abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 8494abb08c2SStefan Weinhuber int i, count, found; 8504abb08c2SStefan Weinhuber 8514abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 8524abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 8534abb08c2SStefan Weinhuber found = 0; 8544abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8554abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 8564abb08c2SStefan Weinhuber found = 1; 8574abb08c2SStefan Weinhuber break; 8584abb08c2SStefan Weinhuber } 8594abb08c2SStefan Weinhuber gneq++; 8604abb08c2SStefan Weinhuber } 8614abb08c2SStefan Weinhuber if (found) 8624abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 8634abb08c2SStefan Weinhuber else 8644abb08c2SStefan Weinhuber return 0; 8654abb08c2SStefan Weinhuber } 8664abb08c2SStefan Weinhuber 8674abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 8681da177e4SLinus Torvalds { 8691da177e4SLinus Torvalds void *conf_data; 8701da177e4SLinus Torvalds int conf_len, conf_data_saved; 8711da177e4SLinus Torvalds int rc; 8721da177e4SLinus Torvalds __u8 lpm; 8731da177e4SLinus Torvalds struct dasd_eckd_private *private; 8741da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8771da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 8781da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 8791da177e4SLinus Torvalds lpm = 0x80; 8801da177e4SLinus Torvalds conf_data_saved = 0; 8811da177e4SLinus Torvalds /* get configuration data per operational path */ 8821da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 8831da177e4SLinus Torvalds if (lpm & path_data->opm){ 88417283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 8851da177e4SLinus Torvalds &conf_len, lpm); 8861da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 887fc19f381SStefan Haberland DBF_EVENT(DBF_WARNING, 8881da177e4SLinus Torvalds "Read configuration data returned " 889fc19f381SStefan Haberland "error %d for device: %s", rc, 890fc19f381SStefan Haberland dev_name(&device->cdev->dev)); 8911da177e4SLinus Torvalds return rc; 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds if (conf_data == NULL) { 894fc19f381SStefan Haberland DBF_EVENT(DBF_WARNING, "No configuration " 895fc19f381SStefan Haberland "data retrieved for device: %s", 896fc19f381SStefan Haberland dev_name(&device->cdev->dev)); 897d133a960SGabriel Craciunescu continue; /* no error */ 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds /* save first valid configuration data */ 9001da177e4SLinus Torvalds if (!conf_data_saved) { 9014abb08c2SStefan Weinhuber kfree(private->conf_data); 9024abb08c2SStefan Weinhuber private->conf_data = conf_data; 9034abb08c2SStefan Weinhuber private->conf_len = conf_len; 9044abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 9054abb08c2SStefan Weinhuber private->conf_data = NULL; 9064abb08c2SStefan Weinhuber private->conf_len = 0; 9074abb08c2SStefan Weinhuber kfree(conf_data); 9084abb08c2SStefan Weinhuber continue; 9094abb08c2SStefan Weinhuber } 9101da177e4SLinus Torvalds conf_data_saved++; 9111da177e4SLinus Torvalds } 9124abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 9131da177e4SLinus Torvalds case 0x02: 9141da177e4SLinus Torvalds path_data->npm |= lpm; 9151da177e4SLinus Torvalds break; 9161da177e4SLinus Torvalds case 0x03: 9171da177e4SLinus Torvalds path_data->ppm |= lpm; 9181da177e4SLinus Torvalds break; 9191da177e4SLinus Torvalds } 9204abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 9211da177e4SLinus Torvalds kfree(conf_data); 9221da177e4SLinus Torvalds } 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds return 0; 9251da177e4SLinus Torvalds } 9261da177e4SLinus Torvalds 9278e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 9288e09f215SStefan Weinhuber { 9298e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 9308e09f215SStefan Weinhuber struct dasd_rssd_features *features; 9318e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 9328e09f215SStefan Weinhuber struct ccw1 *ccw; 9338e09f215SStefan Weinhuber int rc; 9348e09f215SStefan Weinhuber struct dasd_eckd_private *private; 9358e09f215SStefan Weinhuber 9368e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 9378e09f215SStefan Weinhuber cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 9388e09f215SStefan Weinhuber 1 /* PSF */ + 1 /* RSSD */ , 9398e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 9408e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 9418e09f215SStefan Weinhuber device); 9428e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 943fc19f381SStefan Haberland DBF_EVENT(DBF_WARNING, "Could not allocate initialization " 944fc19f381SStefan Haberland "request for device: %s", 945fc19f381SStefan Haberland dev_name(&device->cdev->dev)); 9468e09f215SStefan Weinhuber return PTR_ERR(cqr); 9478e09f215SStefan Weinhuber } 9488e09f215SStefan Weinhuber cqr->startdev = device; 9498e09f215SStefan Weinhuber cqr->memdev = device; 9508e09f215SStefan Weinhuber cqr->block = NULL; 9518e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9528e09f215SStefan Weinhuber cqr->retries = 5; 9538e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 9548e09f215SStefan Weinhuber 9558e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 9568e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 9578e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 9588e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 9598e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 9608e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 9618e09f215SStefan Weinhuber 9628e09f215SStefan Weinhuber ccw = cqr->cpaddr; 9638e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 9648e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 9658e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 9668e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 9678e09f215SStefan Weinhuber 9688e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 9698e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 9708e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 9718e09f215SStefan Weinhuber 9728e09f215SStefan Weinhuber ccw++; 9738e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 9748e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 9758e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 9768e09f215SStefan Weinhuber 9778e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 9788e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 9798e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 9808e09f215SStefan Weinhuber if (rc == 0) { 9818e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 9828e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 9838e09f215SStefan Weinhuber memcpy(&private->features, features, 9848e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 9858e09f215SStefan Weinhuber } 9868e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 9878e09f215SStefan Weinhuber return rc; 9888e09f215SStefan Weinhuber } 9898e09f215SStefan Weinhuber 9908e09f215SStefan Weinhuber 9913d052595SHorst Hummel /* 99240545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 99340545573SHorst Hummel */ 994f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 995f3eb5384SStefan Weinhuber int enable_pav) 99640545573SHorst Hummel { 99740545573SHorst Hummel struct dasd_ccw_req *cqr; 99840545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 99940545573SHorst Hummel struct ccw1 *ccw; 100040545573SHorst Hummel 100140545573SHorst Hummel cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 100240545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 100340545573SHorst Hummel device); 100440545573SHorst Hummel 100540545573SHorst Hummel if (IS_ERR(cqr)) { 1006fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 100740545573SHorst Hummel "Could not allocate PSF-SSC request"); 100840545573SHorst Hummel return cqr; 100940545573SHorst Hummel } 101040545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 101140545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1012f3eb5384SStefan Weinhuber psf_ssc_data->suborder = 0x40; 1013f3eb5384SStefan Weinhuber if (enable_pav) { 1014f3eb5384SStefan Weinhuber psf_ssc_data->suborder |= 0x88; 10158e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1016f3eb5384SStefan Weinhuber } 101740545573SHorst Hummel ccw = cqr->cpaddr; 101840545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 101940545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 102040545573SHorst Hummel ccw->count = 66; 102140545573SHorst Hummel 10228e09f215SStefan Weinhuber cqr->startdev = device; 10238e09f215SStefan Weinhuber cqr->memdev = device; 10248e09f215SStefan Weinhuber cqr->block = NULL; 102540545573SHorst Hummel cqr->expires = 10*HZ; 102640545573SHorst Hummel cqr->buildclk = get_clock(); 102740545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 102840545573SHorst Hummel return cqr; 102940545573SHorst Hummel } 103040545573SHorst Hummel 103140545573SHorst Hummel /* 103240545573SHorst Hummel * Perform Subsystem Function. 103340545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 103440545573SHorst Hummel * call might change behaviour of DASD devices. 103540545573SHorst Hummel */ 103640545573SHorst Hummel static int 1037f3eb5384SStefan Weinhuber dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 103840545573SHorst Hummel { 103940545573SHorst Hummel struct dasd_ccw_req *cqr; 104040545573SHorst Hummel int rc; 104140545573SHorst Hummel 1042f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 104340545573SHorst Hummel if (IS_ERR(cqr)) 104440545573SHorst Hummel return PTR_ERR(cqr); 104540545573SHorst Hummel 104640545573SHorst Hummel rc = dasd_sleep_on(cqr); 104740545573SHorst Hummel if (!rc) 104840545573SHorst Hummel /* trigger CIO to reprobe devices */ 104940545573SHorst Hummel css_schedule_reprobe(); 10508e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 105140545573SHorst Hummel return rc; 105240545573SHorst Hummel } 105340545573SHorst Hummel 105440545573SHorst Hummel /* 105540545573SHorst Hummel * Valide storage server of current device. 105640545573SHorst Hummel */ 10578e09f215SStefan Weinhuber static int dasd_eckd_validate_server(struct dasd_device *device) 105840545573SHorst Hummel { 105940545573SHorst Hummel int rc; 10608e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1061f3eb5384SStefan Weinhuber int enable_pav; 106240545573SHorst Hummel 106340545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1064f3eb5384SStefan Weinhuber enable_pav = 0; 1065f3eb5384SStefan Weinhuber else 1066f3eb5384SStefan Weinhuber enable_pav = 1; 1067f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 106840545573SHorst Hummel /* may be requested feature is not available on server, 106940545573SHorst Hummel * therefore just report error and go ahead */ 10708e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1071fc19f381SStefan Haberland DBF_EVENT(DBF_WARNING, "PSF-SSC on storage subsystem %s.%s.%04x " 1072fc19f381SStefan Haberland "returned rc=%d for device: %s", 10738e09f215SStefan Weinhuber private->uid.vendor, private->uid.serial, 1074fc19f381SStefan Haberland private->uid.ssid, rc, dev_name(&device->cdev->dev)); 107540545573SHorst Hummel /* RE-Read Configuration Data */ 107640545573SHorst Hummel return dasd_eckd_read_conf(device); 107740545573SHorst Hummel } 107840545573SHorst Hummel 107940545573SHorst Hummel /* 10803d052595SHorst Hummel * Check device characteristics. 10813d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 10823d052595SHorst Hummel */ 10831da177e4SLinus Torvalds static int 10841da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 10851da177e4SLinus Torvalds { 10861da177e4SLinus Torvalds struct dasd_eckd_private *private; 10878e09f215SStefan Weinhuber struct dasd_block *block; 10888e09f215SStefan Weinhuber int is_known, rc; 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 109192636b15SSebastian Ott if (!private) { 109292636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 109392636b15SSebastian Ott if (!private) { 1094fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1095fc19f381SStefan Haberland "Allocating memory for private DASD data " 1096fc19f381SStefan Haberland "failed\n"); 10971da177e4SLinus Torvalds return -ENOMEM; 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds device->private = (void *) private; 110092636b15SSebastian Ott } else { 110192636b15SSebastian Ott memset(private, 0, sizeof(*private)); 11021da177e4SLinus Torvalds } 11031da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 11041da177e4SLinus Torvalds private->init_cqr_status = -1; 11051da177e4SLinus Torvalds /* Set default cache operations. */ 11061da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 11071da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 11081da177e4SLinus Torvalds 110940545573SHorst Hummel /* Read Configuration Data */ 111040545573SHorst Hummel rc = dasd_eckd_read_conf(device); 111140545573SHorst Hummel if (rc) 11128e09f215SStefan Weinhuber goto out_err1; 111340545573SHorst Hummel 111440545573SHorst Hummel /* Generate device unique id and register in devmap */ 11158e09f215SStefan Weinhuber rc = dasd_eckd_generate_uid(device, &private->uid); 111640545573SHorst Hummel if (rc) 11178e09f215SStefan Weinhuber goto out_err1; 11188e09f215SStefan Weinhuber dasd_set_uid(device->cdev, &private->uid); 11198e09f215SStefan Weinhuber 11208e09f215SStefan Weinhuber if (private->uid.type == UA_BASE_DEVICE) { 11218e09f215SStefan Weinhuber block = dasd_alloc_block(); 11228e09f215SStefan Weinhuber if (IS_ERR(block)) { 1123fc19f381SStefan Haberland DBF_EVENT(DBF_WARNING, "could not allocate dasd " 1124fc19f381SStefan Haberland "block structure for device: %s", 1125fc19f381SStefan Haberland dev_name(&device->cdev->dev)); 11268e09f215SStefan Weinhuber rc = PTR_ERR(block); 11278e09f215SStefan Weinhuber goto out_err1; 11288e09f215SStefan Weinhuber } 11298e09f215SStefan Weinhuber device->block = block; 11308e09f215SStefan Weinhuber block->base = device; 11318e09f215SStefan Weinhuber } 11328e09f215SStefan Weinhuber 11338e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 11348e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 11358e09f215SStefan Weinhuber if (is_known < 0) { 11368e09f215SStefan Weinhuber rc = is_known; 11378e09f215SStefan Weinhuber goto out_err2; 11388e09f215SStefan Weinhuber } 11398e09f215SStefan Weinhuber if (!is_known) { 11408e09f215SStefan Weinhuber /* new lcu found */ 11418e09f215SStefan Weinhuber rc = dasd_eckd_validate_server(device); /* will switch pav on */ 114240545573SHorst Hummel if (rc) 11438e09f215SStefan Weinhuber goto out_err3; 11448e09f215SStefan Weinhuber } 11458e09f215SStefan Weinhuber 11468e09f215SStefan Weinhuber /* Read Feature Codes */ 11478e09f215SStefan Weinhuber rc = dasd_eckd_read_features(device); 11488e09f215SStefan Weinhuber if (rc) 11498e09f215SStefan Weinhuber goto out_err3; 115040545573SHorst Hummel 11511da177e4SLinus Torvalds /* Read Device Characteristics */ 115292636b15SSebastian Ott rc = dasd_generic_read_dev_chars(device, "ECKD", &private->rdc_data, 115392636b15SSebastian Ott 64); 11548e09f215SStefan Weinhuber if (rc) { 1155fc19f381SStefan Haberland DBF_EVENT(DBF_WARNING, 1156fc19f381SStefan Haberland "Read device characteristics failed, rc=%d for " 1157fc19f381SStefan Haberland "device: %s", rc, dev_name(&device->cdev->dev)); 11588e09f215SStefan Weinhuber goto out_err3; 11598e09f215SStefan Weinhuber } 1160b44b0ab3SStefan Weinhuber /* find the vaild cylinder size */ 1161b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1162b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1163b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1164b44b0ab3SStefan Weinhuber else 1165b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1166b44b0ab3SStefan Weinhuber 1167fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 1168fc19f381SStefan Haberland "with %d cylinders, %d heads, %d sectors\n", 11691da177e4SLinus Torvalds private->rdc_data.dev_type, 11701da177e4SLinus Torvalds private->rdc_data.dev_model, 11711da177e4SLinus Torvalds private->rdc_data.cu_type, 11721da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1173b44b0ab3SStefan Weinhuber private->real_cyl, 11741da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 11751da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 11768e09f215SStefan Weinhuber return 0; 11778e09f215SStefan Weinhuber 11788e09f215SStefan Weinhuber out_err3: 11798e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 11808e09f215SStefan Weinhuber out_err2: 11818e09f215SStefan Weinhuber dasd_free_block(device->block); 11828e09f215SStefan Weinhuber device->block = NULL; 11838e09f215SStefan Weinhuber out_err1: 11844abb08c2SStefan Weinhuber kfree(private->conf_data); 11858e09f215SStefan Weinhuber kfree(device->private); 11868e09f215SStefan Weinhuber device->private = NULL; 11873d052595SHorst Hummel return rc; 11881da177e4SLinus Torvalds } 11891da177e4SLinus Torvalds 11908e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 11918e09f215SStefan Weinhuber { 11924abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 11934abb08c2SStefan Weinhuber 11944abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 11958e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 11964abb08c2SStefan Weinhuber private->ned = NULL; 11974abb08c2SStefan Weinhuber private->sneq = NULL; 11984abb08c2SStefan Weinhuber private->vdsneq = NULL; 11994abb08c2SStefan Weinhuber private->gneq = NULL; 12004abb08c2SStefan Weinhuber private->conf_len = 0; 12014abb08c2SStefan Weinhuber kfree(private->conf_data); 12024abb08c2SStefan Weinhuber private->conf_data = NULL; 12038e09f215SStefan Weinhuber } 12048e09f215SStefan Weinhuber 12051da177e4SLinus Torvalds static struct dasd_ccw_req * 12061da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 12071da177e4SLinus Torvalds { 12081da177e4SLinus Torvalds struct dasd_eckd_private *private; 12091da177e4SLinus Torvalds struct eckd_count *count_data; 12101da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 12111da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 12121da177e4SLinus Torvalds struct ccw1 *ccw; 12131da177e4SLinus Torvalds int cplength, datasize; 12141da177e4SLinus Torvalds int i; 12151da177e4SLinus Torvalds 12161da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12171da177e4SLinus Torvalds 12181da177e4SLinus Torvalds cplength = 8; 12191da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 12201da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 12211da177e4SLinus Torvalds cplength, datasize, device); 12221da177e4SLinus Torvalds if (IS_ERR(cqr)) 12231da177e4SLinus Torvalds return cqr; 12241da177e4SLinus Torvalds ccw = cqr->cpaddr; 12251da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 12261da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 12271da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 12281da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 12291da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 12301da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12311da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 12321da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 12331da177e4SLinus Torvalds 12341da177e4SLinus Torvalds count_data = private->count_area; 12351da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12361da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12371da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 12381da177e4SLinus Torvalds ccw->flags = 0; 12391da177e4SLinus Torvalds ccw->count = 8; 12401da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 12411da177e4SLinus Torvalds ccw++; 12421da177e4SLinus Torvalds count_data++; 12431da177e4SLinus Torvalds } 12441da177e4SLinus Torvalds 12451da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 12461da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12471da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 12481da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 12491da177e4SLinus Torvalds /* Read count ccw. */ 12501da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12511da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 12521da177e4SLinus Torvalds ccw->flags = 0; 12531da177e4SLinus Torvalds ccw->count = 8; 12541da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 12551da177e4SLinus Torvalds 12568e09f215SStefan Weinhuber cqr->block = NULL; 12578e09f215SStefan Weinhuber cqr->startdev = device; 12588e09f215SStefan Weinhuber cqr->memdev = device; 12591da177e4SLinus Torvalds cqr->retries = 0; 12601da177e4SLinus Torvalds cqr->buildclk = get_clock(); 12611da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 12621da177e4SLinus Torvalds return cqr; 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds /* 12661da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 12671da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 12681da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 12691da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 12701da177e4SLinus Torvalds * for deletion in the meantime). 12711da177e4SLinus Torvalds */ 12721da177e4SLinus Torvalds static void 12731da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 12741da177e4SLinus Torvalds { 12751da177e4SLinus Torvalds struct dasd_eckd_private *private; 12761da177e4SLinus Torvalds struct dasd_device *device; 12771da177e4SLinus Torvalds 12788e09f215SStefan Weinhuber device = init_cqr->startdev; 12791da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12801da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 12811da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 12821da177e4SLinus Torvalds dasd_kick_device(device); 12831da177e4SLinus Torvalds } 12841da177e4SLinus Torvalds 12851da177e4SLinus Torvalds static int 12868e09f215SStefan Weinhuber dasd_eckd_start_analysis(struct dasd_block *block) 12871da177e4SLinus Torvalds { 12881da177e4SLinus Torvalds struct dasd_eckd_private *private; 12891da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 12901da177e4SLinus Torvalds 12918e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 12928e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 12931da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 12941da177e4SLinus Torvalds return PTR_ERR(init_cqr); 12951da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 12961da177e4SLinus Torvalds init_cqr->callback_data = NULL; 12971da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 12981da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 12991da177e4SLinus Torvalds return -EAGAIN; 13001da177e4SLinus Torvalds } 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds static int 13038e09f215SStefan Weinhuber dasd_eckd_end_analysis(struct dasd_block *block) 13041da177e4SLinus Torvalds { 13058e09f215SStefan Weinhuber struct dasd_device *device; 13061da177e4SLinus Torvalds struct dasd_eckd_private *private; 13071da177e4SLinus Torvalds struct eckd_count *count_area; 13081da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 13091da177e4SLinus Torvalds int status, i; 13101da177e4SLinus Torvalds 13118e09f215SStefan Weinhuber device = block->base; 13121da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 13131da177e4SLinus Torvalds status = private->init_cqr_status; 13141da177e4SLinus Torvalds private->init_cqr_status = -1; 13151da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 1316fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1317fc19f381SStefan Haberland "The DASD is not formatted\n"); 13181da177e4SLinus Torvalds return -EMEDIUMTYPE; 13191da177e4SLinus Torvalds } 13201da177e4SLinus Torvalds 13211da177e4SLinus Torvalds private->uses_cdl = 1; 13221da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 13231da177e4SLinus Torvalds count_area = NULL; 13241da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 13251da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 13261da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 13271da177e4SLinus Torvalds private->uses_cdl = 0; 13281da177e4SLinus Torvalds break; 13291da177e4SLinus Torvalds } 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds if (i == 3) 13321da177e4SLinus Torvalds count_area = &private->count_area[4]; 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvalds if (private->uses_cdl == 0) { 13351da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 13361da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 13371da177e4SLinus Torvalds (private->count_area[i].dl != 13381da177e4SLinus Torvalds private->count_area[0].dl)) 13391da177e4SLinus Torvalds break; 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds if (i == 5) 13421da177e4SLinus Torvalds count_area = &private->count_area[0]; 13431da177e4SLinus Torvalds } else { 13441da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1345fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1346fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 13471da177e4SLinus Torvalds } 13481da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 13491da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 13501da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 13518e09f215SStefan Weinhuber block->bp_block = count_area->dl; 13521da177e4SLinus Torvalds } 13538e09f215SStefan Weinhuber if (block->bp_block == 0) { 1354fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1355fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 13561da177e4SLinus Torvalds return -EMEDIUMTYPE; 13571da177e4SLinus Torvalds } 13588e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 13598e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 13608e09f215SStefan Weinhuber block->s2b_shift++; 13611da177e4SLinus Torvalds 13628e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1363b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 13641da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 13651da177e4SLinus Torvalds blk_per_trk); 13661da177e4SLinus Torvalds 1367fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1368fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1369fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1370b44b0ab3SStefan Weinhuber ((private->real_cyl * 13711da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 13728e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 13738e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 13741da177e4SLinus Torvalds private->uses_cdl ? 13751da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 13761da177e4SLinus Torvalds 13771da177e4SLinus Torvalds return 0; 13781da177e4SLinus Torvalds } 13791da177e4SLinus Torvalds 13808e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 13811da177e4SLinus Torvalds { 13821da177e4SLinus Torvalds struct dasd_eckd_private *private; 13831da177e4SLinus Torvalds 13848e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 13851da177e4SLinus Torvalds if (private->init_cqr_status < 0) 13868e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 13871da177e4SLinus Torvalds else 13888e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 13891da177e4SLinus Torvalds } 13901da177e4SLinus Torvalds 13918e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 13928e09f215SStefan Weinhuber { 13938e09f215SStefan Weinhuber return dasd_alias_add_device(device); 13948e09f215SStefan Weinhuber }; 13958e09f215SStefan Weinhuber 13968e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 13978e09f215SStefan Weinhuber { 13988e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 13998e09f215SStefan Weinhuber }; 14008e09f215SStefan Weinhuber 14011da177e4SLinus Torvalds static int 14028e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 14031da177e4SLinus Torvalds { 14041da177e4SLinus Torvalds struct dasd_eckd_private *private; 14051da177e4SLinus Torvalds 14068e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 14078e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 14081da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 14098e09f215SStefan Weinhuber 0, block->bp_block); 14101da177e4SLinus Torvalds } 14111da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 14121da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 14131da177e4SLinus Torvalds return 0; 14141da177e4SLinus Torvalds } 14151da177e4SLinus Torvalds 14161da177e4SLinus Torvalds static struct dasd_ccw_req * 14171da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 14181da177e4SLinus Torvalds struct format_data_t * fdata) 14191da177e4SLinus Torvalds { 14201da177e4SLinus Torvalds struct dasd_eckd_private *private; 14211da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 14221da177e4SLinus Torvalds struct eckd_count *ect; 14231da177e4SLinus Torvalds struct ccw1 *ccw; 14241da177e4SLinus Torvalds void *data; 1425b44b0ab3SStefan Weinhuber int rpt; 1426b44b0ab3SStefan Weinhuber struct ch_t address; 14271da177e4SLinus Torvalds int cplength, datasize; 14281da177e4SLinus Torvalds int i; 1429f9a28f7bSJean-Baptiste Joret int intensity = 0; 1430f9a28f7bSJean-Baptiste Joret int r0_perm; 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 14331da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1434b44b0ab3SStefan Weinhuber set_ch_t(&address, 1435b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1436b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 14371da177e4SLinus Torvalds 14381da177e4SLinus Torvalds /* Sanity checks. */ 14391da177e4SLinus Torvalds if (fdata->start_unit >= 1440b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1441fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 1442fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 14431da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 14441da177e4SLinus Torvalds } 14451da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1446fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 1447fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 14481da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 14491da177e4SLinus Torvalds } 14501da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 1451fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1452fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 14531da177e4SLinus Torvalds fdata->blksize); 14541da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 14551da177e4SLinus Torvalds } 14561da177e4SLinus Torvalds 14571da177e4SLinus Torvalds /* 14581da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 14591da177e4SLinus Torvalds * Bit 0: write record zero 14601da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 14611da177e4SLinus Torvalds * Bit 2: invalidate tracks 14621da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1463f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 14641da177e4SLinus Torvalds * Only some bit combinations do make sense. 14651da177e4SLinus Torvalds */ 1466f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1467f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1468f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1469f9a28f7bSJean-Baptiste Joret } else { 1470f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1471f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1472f9a28f7bSJean-Baptiste Joret } 1473f9a28f7bSJean-Baptiste Joret switch (intensity) { 14741da177e4SLinus Torvalds case 0x00: /* Normal format */ 14751da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 14761da177e4SLinus Torvalds cplength = 2 + rpt; 14771da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 14781da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 14791da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 14801da177e4SLinus Torvalds break; 14811da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 14821da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 14831da177e4SLinus Torvalds cplength = 3 + rpt; 14841da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 14851da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 14861da177e4SLinus Torvalds sizeof(struct eckd_count) + 14871da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 14881da177e4SLinus Torvalds break; 14891da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 14901da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 14911da177e4SLinus Torvalds cplength = 3; 14921da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 14931da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 14941da177e4SLinus Torvalds sizeof(struct eckd_count); 14951da177e4SLinus Torvalds break; 14961da177e4SLinus Torvalds default: 1497fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 1498fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 14991da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15001da177e4SLinus Torvalds } 15011da177e4SLinus Torvalds /* Allocate the format ccw request. */ 15021da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 15031da177e4SLinus Torvalds cplength, datasize, device); 15041da177e4SLinus Torvalds if (IS_ERR(fcp)) 15051da177e4SLinus Torvalds return fcp; 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds data = fcp->data; 15081da177e4SLinus Torvalds ccw = fcp->cpaddr; 15091da177e4SLinus Torvalds 1510f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 15111da177e4SLinus Torvalds case 0x00: /* Normal format. */ 15121da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 15131da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 15141da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1515f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1516f9a28f7bSJean-Baptiste Joret if (r0_perm) 1517f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 15181da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 15191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15201da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 15211da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 15221da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 15231da177e4SLinus Torvalds fdata->blksize); 15241da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 15251da177e4SLinus Torvalds break; 15261da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 15271da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 15281da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 15291da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 15301da177e4SLinus Torvalds device); 15311da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 15321da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15331da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 15341da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 15351da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 15368e09f215SStefan Weinhuber device->block->bp_block); 15371da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 15381da177e4SLinus Torvalds break; 15391da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 15401da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 15411da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 15421da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 15431da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 15441da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15451da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 15461da177e4SLinus Torvalds fdata->start_unit, 0, 1, 15471da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 15481da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 15491da177e4SLinus Torvalds break; 15501da177e4SLinus Torvalds } 1551f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 15521da177e4SLinus Torvalds ect = (struct eckd_count *) data; 15531da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1554b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1555b44b0ab3SStefan Weinhuber ect->head = address.head; 15561da177e4SLinus Torvalds ect->record = 0; 15571da177e4SLinus Torvalds ect->kl = 0; 15581da177e4SLinus Torvalds ect->dl = 8; 15591da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15601da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 15611da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 15621da177e4SLinus Torvalds ccw->count = 8; 15631da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 15641da177e4SLinus Torvalds ccw++; 15651da177e4SLinus Torvalds } 1566f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 15671da177e4SLinus Torvalds ect = (struct eckd_count *) data; 15681da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1569b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1570b44b0ab3SStefan Weinhuber ect->head = address.head; 15711da177e4SLinus Torvalds ect->record = 1; 15721da177e4SLinus Torvalds ect->kl = 0; 15731da177e4SLinus Torvalds ect->dl = 0; 15741da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15751da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 15761da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 15771da177e4SLinus Torvalds ccw->count = 8; 15781da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 15791da177e4SLinus Torvalds } else { /* write remaining records */ 15801da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 15811da177e4SLinus Torvalds ect = (struct eckd_count *) data; 15821da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1583b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1584b44b0ab3SStefan Weinhuber ect->head = address.head; 15851da177e4SLinus Torvalds ect->record = i + 1; 15861da177e4SLinus Torvalds ect->kl = 0; 15871da177e4SLinus Torvalds ect->dl = fdata->blksize; 15881da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1589f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 15901da177e4SLinus Torvalds fdata->start_unit == 0) { 15911da177e4SLinus Torvalds if (i < 3) { 15921da177e4SLinus Torvalds ect->kl = 4; 15931da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 15941da177e4SLinus Torvalds } 15951da177e4SLinus Torvalds } 1596f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 15971da177e4SLinus Torvalds fdata->start_unit == 1) { 15981da177e4SLinus Torvalds ect->kl = 44; 15991da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 16001da177e4SLinus Torvalds } 16011da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16021da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 16031da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16041da177e4SLinus Torvalds ccw->count = 8; 16051da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16061da177e4SLinus Torvalds ccw++; 16071da177e4SLinus Torvalds } 16081da177e4SLinus Torvalds } 16098e09f215SStefan Weinhuber fcp->startdev = device; 16108e09f215SStefan Weinhuber fcp->memdev = device; 16118e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); 16128e09f215SStefan Weinhuber fcp->retries = 5; /* set retry counter to enable default ERP */ 16131da177e4SLinus Torvalds fcp->buildclk = get_clock(); 16141da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 16151da177e4SLinus Torvalds return fcp; 16161da177e4SLinus Torvalds } 16171da177e4SLinus Torvalds 16188e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 16191da177e4SLinus Torvalds { 16208e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 16218e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 16228e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 16238e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 16241da177e4SLinus Torvalds } 16258e09f215SStefan Weinhuber }; 16261da177e4SLinus Torvalds 16271da177e4SLinus Torvalds static dasd_erp_fn_t 16281da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 16291da177e4SLinus Torvalds { 16308e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 16311da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 16321da177e4SLinus Torvalds 16331da177e4SLinus Torvalds switch (cdev->id.cu_type) { 16341da177e4SLinus Torvalds case 0x3990: 16351da177e4SLinus Torvalds case 0x2105: 16361da177e4SLinus Torvalds case 0x2107: 16371da177e4SLinus Torvalds case 0x1750: 16381da177e4SLinus Torvalds return dasd_3990_erp_action; 16391da177e4SLinus Torvalds case 0x9343: 16401da177e4SLinus Torvalds case 0x3880: 16411da177e4SLinus Torvalds default: 16421da177e4SLinus Torvalds return dasd_default_erp_action; 16431da177e4SLinus Torvalds } 16441da177e4SLinus Torvalds } 16451da177e4SLinus Torvalds 16461da177e4SLinus Torvalds static dasd_erp_fn_t 16471da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 16481da177e4SLinus Torvalds { 16491da177e4SLinus Torvalds return dasd_default_erp_postaction; 16501da177e4SLinus Torvalds } 16511da177e4SLinus Torvalds 16528e09f215SStefan Weinhuber 16538e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 16548e09f215SStefan Weinhuber struct irb *irb) 16558e09f215SStefan Weinhuber { 16568e09f215SStefan Weinhuber char mask; 1657f3eb5384SStefan Weinhuber char *sense = NULL; 16588e09f215SStefan Weinhuber 16598e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 16608e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1661f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 16628e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 16638e09f215SStefan Weinhuber return; 16648e09f215SStefan Weinhuber } 16658e09f215SStefan Weinhuber 16668e09f215SStefan Weinhuber /* summary unit check */ 1667f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 166823d805b6SPeter Oberparleiter (irb->ecw[7] == 0x0D)) { 16698e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 16708e09f215SStefan Weinhuber return; 16718e09f215SStefan Weinhuber } 16728e09f215SStefan Weinhuber 1673f3eb5384SStefan Weinhuber sense = dasd_get_sense(irb); 1674f60c768cSStefan Haberland /* service information message SIM */ 1675f3eb5384SStefan Weinhuber if (sense && !(sense[27] & DASD_SENSE_BIT_0) && 1676f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1677f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 16789d853cafSStefan Haberland dasd_schedule_device_bh(device); 1679f60c768cSStefan Haberland return; 1680f60c768cSStefan Haberland } 1681f60c768cSStefan Haberland 1682f3eb5384SStefan Weinhuber if ((scsw_cc(&irb->scsw) == 1) && 1683f3eb5384SStefan Weinhuber (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) && 1684f3eb5384SStefan Weinhuber (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) && 1685f3eb5384SStefan Weinhuber (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) { 1686ada3df91SStefan Haberland /* fake irb do nothing, they are handled elsewhere */ 16878e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 1688ada3df91SStefan Haberland return; 1689ada3df91SStefan Haberland } 16908e09f215SStefan Weinhuber 1691f3eb5384SStefan Weinhuber if (!sense) { 1692ada3df91SStefan Haberland /* just report other unsolicited interrupts */ 1693fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "%s", 1694ada3df91SStefan Haberland "unsolicited interrupt received"); 1695ada3df91SStefan Haberland } else { 1696fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "%s", 1697ada3df91SStefan Haberland "unsolicited interrupt received " 1698ada3df91SStefan Haberland "(sense available)"); 1699fc19f381SStefan Haberland device->discipline->dump_sense_dbf(device, NULL, irb, 1700fc19f381SStefan Haberland "unsolicited"); 1701ada3df91SStefan Haberland } 1702ada3df91SStefan Haberland 1703ada3df91SStefan Haberland dasd_schedule_device_bh(device); 17048e09f215SStefan Weinhuber return; 17058e09f215SStefan Weinhuber }; 17068e09f215SStefan Weinhuber 1707f3eb5384SStefan Weinhuber 1708f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 1709f3eb5384SStefan Weinhuber struct dasd_device *startdev, 17108e09f215SStefan Weinhuber struct dasd_block *block, 1711f3eb5384SStefan Weinhuber struct request *req, 1712f3eb5384SStefan Weinhuber sector_t first_rec, 1713f3eb5384SStefan Weinhuber sector_t last_rec, 1714f3eb5384SStefan Weinhuber sector_t first_trk, 1715f3eb5384SStefan Weinhuber sector_t last_trk, 1716f3eb5384SStefan Weinhuber unsigned int first_offs, 1717f3eb5384SStefan Weinhuber unsigned int last_offs, 1718f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1719f3eb5384SStefan Weinhuber unsigned int blksize) 17201da177e4SLinus Torvalds { 17211da177e4SLinus Torvalds struct dasd_eckd_private *private; 17221da177e4SLinus Torvalds unsigned long *idaws; 17231da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 17241da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17251da177e4SLinus Torvalds struct ccw1 *ccw; 17265705f702SNeilBrown struct req_iterator iter; 17271da177e4SLinus Torvalds struct bio_vec *bv; 17281da177e4SLinus Torvalds char *dst; 1729f3eb5384SStefan Weinhuber unsigned int off; 17301da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 1731f3eb5384SStefan Weinhuber sector_t recid; 17321da177e4SLinus Torvalds unsigned char cmd, rcmd; 17338e09f215SStefan Weinhuber int use_prefix; 17348e09f215SStefan Weinhuber struct dasd_device *basedev; 17351da177e4SLinus Torvalds 17368e09f215SStefan Weinhuber basedev = block->base; 17378e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 17381da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 17391da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 17401da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 17411da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 17421da177e4SLinus Torvalds else 17431da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 1744f3eb5384SStefan Weinhuber 17451da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 17461da177e4SLinus Torvalds count = 0; 17471da177e4SLinus Torvalds cidaw = 0; 17485705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 17491da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 17501da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 17511da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 17528e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1753347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 17546c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 17558e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 17561da177e4SLinus Torvalds #endif 17571da177e4SLinus Torvalds } 17581da177e4SLinus Torvalds /* Paranoia. */ 17591da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 17601da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 17618e09f215SStefan Weinhuber 17628e09f215SStefan Weinhuber /* use the prefix command if available */ 17638e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 17648e09f215SStefan Weinhuber if (use_prefix) { 17658e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 17668e09f215SStefan Weinhuber cplength = 2 + count; 17678e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 17688e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 17698e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 17708e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 17718e09f215SStefan Weinhuber } else { 17721da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 17731da177e4SLinus Torvalds cplength = 2 + count; 17741da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 17758e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 17768e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 17771da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 17788e09f215SStefan Weinhuber } 17791da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 17801da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 17811da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 17821da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 17831da177e4SLinus Torvalds cplength += count; 17841da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 17851da177e4SLinus Torvalds } 17861da177e4SLinus Torvalds /* Allocate the ccw request. */ 17871da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 17888e09f215SStefan Weinhuber cplength, datasize, startdev); 17891da177e4SLinus Torvalds if (IS_ERR(cqr)) 17901da177e4SLinus Torvalds return cqr; 17911da177e4SLinus Torvalds ccw = cqr->cpaddr; 17928e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 17938e09f215SStefan Weinhuber if (use_prefix) { 17948e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 17958e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 17968e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 17978e09f215SStefan Weinhuber * Try again later. 17988e09f215SStefan Weinhuber */ 17998e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1800d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1801d54853efSMartin Schwidefsky } 18028e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 18038e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 18048e09f215SStefan Weinhuber } else { 18058e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 18068e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 18078e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 18088e09f215SStefan Weinhuber * Try again later. 18098e09f215SStefan Weinhuber */ 18108e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 18118e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 18128e09f215SStefan Weinhuber } 18138e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 18148e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 18158e09f215SStefan Weinhuber } 18161da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 18171da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 18181da177e4SLinus Torvalds recid = first_rec; 18191da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 18201da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 18211da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18221da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 18238e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 18241da177e4SLinus Torvalds } 18255705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 18261da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 18271da177e4SLinus Torvalds if (dasd_page_cache) { 18281da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1829441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 18301da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 18311da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 18321da177e4SLinus Torvalds if (copy) 18331da177e4SLinus Torvalds dst = copy + bv->bv_offset; 18341da177e4SLinus Torvalds } 18351da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 18361da177e4SLinus Torvalds sector_t trkid = recid; 18371da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 18381da177e4SLinus Torvalds rcmd = cmd; 18391da177e4SLinus Torvalds count = blksize; 18401da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 18411da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 18421da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 18431da177e4SLinus Torvalds rcmd |= 0x8; 18441da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1845ec5883abSHorst Hummel if (count < blksize && 1846ec5883abSHorst Hummel rq_data_dir(req) == READ) 18471da177e4SLinus Torvalds memset(dst + count, 0xe5, 18481da177e4SLinus Torvalds blksize - count); 18491da177e4SLinus Torvalds } 18501da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18511da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 18521da177e4SLinus Torvalds trkid, recoffs + 1, 18538e09f215SStefan Weinhuber 1, rcmd, basedev, count); 18541da177e4SLinus Torvalds } 18551da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 18561da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 18571da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18581da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 18591da177e4SLinus Torvalds trkid, recoffs + 1, 18601da177e4SLinus Torvalds last_rec - recid + 1, 18618e09f215SStefan Weinhuber cmd, basedev, count); 18621da177e4SLinus Torvalds } 18631da177e4SLinus Torvalds /* Read/write ccw. */ 18641da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18651da177e4SLinus Torvalds ccw->cmd_code = rcmd; 18661da177e4SLinus Torvalds ccw->count = count; 18671da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 18681da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 18691da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 18701da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 18711da177e4SLinus Torvalds } else { 18721da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 18731da177e4SLinus Torvalds ccw->flags = 0; 18741da177e4SLinus Torvalds } 18751da177e4SLinus Torvalds ccw++; 18761da177e4SLinus Torvalds dst += blksize; 18771da177e4SLinus Torvalds recid++; 18781da177e4SLinus Torvalds } 18791da177e4SLinus Torvalds } 188013de227bSHolger Smolinski if (blk_noretry_request(req) || 188113de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 18821c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 18838e09f215SStefan Weinhuber cqr->startdev = startdev; 18848e09f215SStefan Weinhuber cqr->memdev = startdev; 18858e09f215SStefan Weinhuber cqr->block = block; 18861da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 18871da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 18881da177e4SLinus Torvalds cqr->retries = 256; 18891da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18901da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18911da177e4SLinus Torvalds return cqr; 18921da177e4SLinus Torvalds } 18931da177e4SLinus Torvalds 1894f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 1895f3eb5384SStefan Weinhuber struct dasd_device *startdev, 1896f3eb5384SStefan Weinhuber struct dasd_block *block, 1897f3eb5384SStefan Weinhuber struct request *req, 1898f3eb5384SStefan Weinhuber sector_t first_rec, 1899f3eb5384SStefan Weinhuber sector_t last_rec, 1900f3eb5384SStefan Weinhuber sector_t first_trk, 1901f3eb5384SStefan Weinhuber sector_t last_trk, 1902f3eb5384SStefan Weinhuber unsigned int first_offs, 1903f3eb5384SStefan Weinhuber unsigned int last_offs, 1904f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1905f3eb5384SStefan Weinhuber unsigned int blksize) 1906f3eb5384SStefan Weinhuber { 1907f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 1908f3eb5384SStefan Weinhuber unsigned long *idaws; 1909f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 1910f3eb5384SStefan Weinhuber struct ccw1 *ccw; 1911f3eb5384SStefan Weinhuber struct req_iterator iter; 1912f3eb5384SStefan Weinhuber struct bio_vec *bv; 1913f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 1914f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 1915f3eb5384SStefan Weinhuber unsigned int tlf; 1916f3eb5384SStefan Weinhuber sector_t recid; 1917f3eb5384SStefan Weinhuber unsigned char cmd; 1918f3eb5384SStefan Weinhuber struct dasd_device *basedev; 1919f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 1920f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 1921f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 1922f3eb5384SStefan Weinhuber sector_t trkid; 1923f3eb5384SStefan Weinhuber unsigned int recoffs; 1924f3eb5384SStefan Weinhuber 1925f3eb5384SStefan Weinhuber basedev = block->base; 1926f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 1927f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 1928f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 1929f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 1930f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 1931f3eb5384SStefan Weinhuber else 1932f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 1933f3eb5384SStefan Weinhuber 1934f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 1935f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 1936f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 1937f3eb5384SStefan Weinhuber * of records as upper limit. 1938f3eb5384SStefan Weinhuber */ 1939f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 1940f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 1941f3eb5384SStefan Weinhuber 1942f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 1943f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 1944f3eb5384SStefan Weinhuber 1945f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 1946f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 1947f3eb5384SStefan Weinhuber */ 1948f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 1949f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 1950f3eb5384SStefan Weinhuber 1951f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 1952f3eb5384SStefan Weinhuber cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1953f3eb5384SStefan Weinhuber cplength, datasize, startdev); 1954f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 1955f3eb5384SStefan Weinhuber return cqr; 1956f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 1957f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 1958f3eb5384SStefan Weinhuber if (first_trk == last_trk) 1959f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 1960f3eb5384SStefan Weinhuber else 1961f3eb5384SStefan Weinhuber tlf = last_offs + 1; 1962f3eb5384SStefan Weinhuber tlf *= blksize; 1963f3eb5384SStefan Weinhuber 1964f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 1965f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 1966f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 1967f3eb5384SStefan Weinhuber trkcount, blksize, 1968f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 1969f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 1970f3eb5384SStefan Weinhuber * Try again later. 1971f3eb5384SStefan Weinhuber */ 1972f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1973f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 1974f3eb5384SStefan Weinhuber } 1975f3eb5384SStefan Weinhuber 1976f3eb5384SStefan Weinhuber /* 1977f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 1978f3eb5384SStefan Weinhuber * following conditions: 1979f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 1980f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 1981f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 1982f3eb5384SStefan Weinhuber */ 1983f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 1984f3eb5384SStefan Weinhuber recid = first_rec; 1985f3eb5384SStefan Weinhuber new_track = 1; 1986f3eb5384SStefan Weinhuber end_idaw = 0; 1987f3eb5384SStefan Weinhuber len_to_track_end = 0; 1988f3eb5384SStefan Weinhuber idaw_dst = 0; 1989f3eb5384SStefan Weinhuber idaw_len = 0; 1990f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 1991f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 1992f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 1993f3eb5384SStefan Weinhuber while (seg_len) { 1994f3eb5384SStefan Weinhuber if (new_track) { 1995f3eb5384SStefan Weinhuber trkid = recid; 1996f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 1997f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 1998f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 1999f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2000f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2001f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2002f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2003f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2004f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2005f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2006f3eb5384SStefan Weinhuber ccw++; 2007f3eb5384SStefan Weinhuber recid += count; 2008f3eb5384SStefan Weinhuber new_track = 0; 200952db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 201052db45c3SStefan Weinhuber if (!idaw_dst) 201152db45c3SStefan Weinhuber idaw_dst = dst; 2012f3eb5384SStefan Weinhuber } 201352db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 201452db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2015f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2016f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2017f3eb5384SStefan Weinhuber * idaw ends 2018f3eb5384SStefan Weinhuber */ 201952db45c3SStefan Weinhuber if (!idaw_dst) { 202052db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 202152db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 202252db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 202352db45c3SStefan Weinhuber } else 2024f3eb5384SStefan Weinhuber idaw_dst = dst; 202552db45c3SStefan Weinhuber } 2026f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2027f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2028f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2029f3eb5384SStefan Weinhuber } 2030f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2031f3eb5384SStefan Weinhuber seg_len -= part_len; 2032f3eb5384SStefan Weinhuber dst += part_len; 2033f3eb5384SStefan Weinhuber idaw_len += part_len; 2034f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2035f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2036f3eb5384SStefan Weinhuber * -> create an idaw 2037f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2038f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2039f3eb5384SStefan Weinhuber */ 2040f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2041f3eb5384SStefan Weinhuber end_idaw = 1; 2042f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2043f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2044f3eb5384SStefan Weinhuber new_track = 1; 2045f3eb5384SStefan Weinhuber end_idaw = 1; 2046f3eb5384SStefan Weinhuber } 2047f3eb5384SStefan Weinhuber if (end_idaw) { 2048f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2049f3eb5384SStefan Weinhuber idaw_len); 2050f3eb5384SStefan Weinhuber idaw_dst = 0; 2051f3eb5384SStefan Weinhuber idaw_len = 0; 2052f3eb5384SStefan Weinhuber end_idaw = 0; 2053f3eb5384SStefan Weinhuber } 2054f3eb5384SStefan Weinhuber } 2055f3eb5384SStefan Weinhuber } 2056f3eb5384SStefan Weinhuber 2057f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2058f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2059f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2060f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2061f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2062f3eb5384SStefan Weinhuber cqr->block = block; 2063f3eb5384SStefan Weinhuber cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2064f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2065f3eb5384SStefan Weinhuber cqr->retries = 256; 2066f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2067f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2068f3eb5384SStefan Weinhuber return cqr; 2069f3eb5384SStefan Weinhuber } 2070f3eb5384SStefan Weinhuber 2071f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2072f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2073f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2074f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2075f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2076f3eb5384SStefan Weinhuber unsigned int blksize, 2077f3eb5384SStefan Weinhuber unsigned int total_data_size, 2078f3eb5384SStefan Weinhuber unsigned int tlf, 2079f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2080f3eb5384SStefan Weinhuber { 2081f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2082f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2083f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2084f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2085f3eb5384SStefan Weinhuber struct dcw *dcw; 2086f3eb5384SStefan Weinhuber 2087f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2088f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2089f3eb5384SStefan Weinhuber u8 pfx_cmd; 2090f3eb5384SStefan Weinhuber 2091f3eb5384SStefan Weinhuber int rc = 0; 2092f3eb5384SStefan Weinhuber int sector = 0; 2093f3eb5384SStefan Weinhuber int dn, d; 2094f3eb5384SStefan Weinhuber 2095f3eb5384SStefan Weinhuber 2096f3eb5384SStefan Weinhuber /* setup prefix data */ 2097f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2098f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2099f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2100f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2101f3eb5384SStefan Weinhuber 2102f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2103f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2104f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2105f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2106f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2107f3eb5384SStefan Weinhuber 2108f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2109f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2110f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2111f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2112f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2113f3eb5384SStefan Weinhuber } 2114f3eb5384SStefan Weinhuber 2115f3eb5384SStefan Weinhuber switch (cmd) { 2116f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2117f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2118f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2119f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2120f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2121f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2122f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2123f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2124f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2125f3eb5384SStefan Weinhuber break; 2126f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2127f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2128f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2129f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2130f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2131f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2132f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2133f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2134f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2135f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2136f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2137f3eb5384SStefan Weinhuber break; 2138f3eb5384SStefan Weinhuber default: 2139f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2140f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2141f3eb5384SStefan Weinhuber BUG(); 2142f3eb5384SStefan Weinhuber break; 2143f3eb5384SStefan Weinhuber } 2144f3eb5384SStefan Weinhuber if (rc) 2145f3eb5384SStefan Weinhuber return rc; 2146f3eb5384SStefan Weinhuber 2147f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2148f3eb5384SStefan Weinhuber 2149f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2150f3eb5384SStefan Weinhuber begcyl = trk / heads; 2151f3eb5384SStefan Weinhuber beghead = trk % heads; 2152f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2153f3eb5384SStefan Weinhuber endhead = totrk % heads; 2154f3eb5384SStefan Weinhuber 2155f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2156f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2157f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2158f3eb5384SStefan Weinhuber 2159f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2160f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2161f3eb5384SStefan Weinhuber else 2162f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2163f3eb5384SStefan Weinhuber } 2164f3eb5384SStefan Weinhuber 2165f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2166f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2167f3eb5384SStefan Weinhuber 2168f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2169f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2170f3eb5384SStefan Weinhuber 2171f3eb5384SStefan Weinhuber if (rec_on_trk) { 2172f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2173f3eb5384SStefan Weinhuber case 0x3390: 2174f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2175f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2176f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2177f3eb5384SStefan Weinhuber break; 2178f3eb5384SStefan Weinhuber case 0x3380: 2179f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2180f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2181f3eb5384SStefan Weinhuber break; 2182f3eb5384SStefan Weinhuber } 2183f3eb5384SStefan Weinhuber } 2184f3eb5384SStefan Weinhuber 2185f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2186f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2187f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2188f3eb5384SStefan Weinhuber lredata->length = tlf; 2189f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2190f3eb5384SStefan Weinhuber lredata->count = count; 2191f3eb5384SStefan Weinhuber lredata->sector = sector; 2192f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2193f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2194f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2195f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2196f3eb5384SStefan Weinhuber 2197f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2198f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2199f3eb5384SStefan Weinhuber 2200f3eb5384SStefan Weinhuber return rc; 2201f3eb5384SStefan Weinhuber } 2202f3eb5384SStefan Weinhuber 2203f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2204f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2205f3eb5384SStefan Weinhuber struct dasd_block *block, 2206f3eb5384SStefan Weinhuber struct request *req, 2207f3eb5384SStefan Weinhuber sector_t first_rec, 2208f3eb5384SStefan Weinhuber sector_t last_rec, 2209f3eb5384SStefan Weinhuber sector_t first_trk, 2210f3eb5384SStefan Weinhuber sector_t last_trk, 2211f3eb5384SStefan Weinhuber unsigned int first_offs, 2212f3eb5384SStefan Weinhuber unsigned int last_offs, 2213f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2214f3eb5384SStefan Weinhuber unsigned int blksize) 2215f3eb5384SStefan Weinhuber { 2216f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2217f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2218f3eb5384SStefan Weinhuber struct req_iterator iter; 2219f3eb5384SStefan Weinhuber struct bio_vec *bv; 2220f3eb5384SStefan Weinhuber char *dst; 2221f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2222f3eb5384SStefan Weinhuber unsigned char cmd; 2223f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2224f3eb5384SStefan Weinhuber unsigned int tlf; 2225f3eb5384SStefan Weinhuber struct itcw *itcw; 2226f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2227f3eb5384SStefan Weinhuber int itcw_op; 2228f3eb5384SStefan Weinhuber size_t itcw_size; 2229f3eb5384SStefan Weinhuber 2230f3eb5384SStefan Weinhuber basedev = block->base; 2231f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2232f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2233f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2234f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2235f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2236f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2237f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2238f3eb5384SStefan Weinhuber } else 2239f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2240f3eb5384SStefan Weinhuber 2241f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2242f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2243f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2244f3eb5384SStefan Weinhuber */ 2245f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2246f3eb5384SStefan Weinhuber ctidaw = 0; 2247f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2248f3eb5384SStefan Weinhuber ++ctidaw; 2249f3eb5384SStefan Weinhuber } 2250f3eb5384SStefan Weinhuber 2251f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2252f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 2253f3eb5384SStefan Weinhuber cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 2254f3eb5384SStefan Weinhuber 0, itcw_size, startdev); 2255f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2256f3eb5384SStefan Weinhuber return cqr; 2257f3eb5384SStefan Weinhuber 2258f3eb5384SStefan Weinhuber cqr->cpmode = 1; 2259f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2260f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2261f3eb5384SStefan Weinhuber cqr->block = block; 2262f3eb5384SStefan Weinhuber cqr->expires = 100*HZ; 2263f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2264f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2265f3eb5384SStefan Weinhuber cqr->retries = 10; 2266f3eb5384SStefan Weinhuber 2267f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2268f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2269f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2270f3eb5384SStefan Weinhuber else 2271f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2272f3eb5384SStefan Weinhuber tlf *= blksize; 2273f3eb5384SStefan Weinhuber 2274f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2275f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2276f3eb5384SStefan Weinhuber 2277f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2278f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2279f3eb5384SStefan Weinhuber first_offs + 1, 2280f3eb5384SStefan Weinhuber trkcount, blksize, 2281f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2282f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2283f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2284f3eb5384SStefan Weinhuber * Try again later. 2285f3eb5384SStefan Weinhuber */ 2286f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2287f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2288f3eb5384SStefan Weinhuber } 2289f3eb5384SStefan Weinhuber 2290f3eb5384SStefan Weinhuber /* 2291f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2292f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2293f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2294f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2295f3eb5384SStefan Weinhuber */ 2296f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2297f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2298f3eb5384SStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len); 2299f3eb5384SStefan Weinhuber if (IS_ERR(last_tidaw)) 2300f3eb5384SStefan Weinhuber return (struct dasd_ccw_req *)last_tidaw; 2301f3eb5384SStefan Weinhuber } 2302f3eb5384SStefan Weinhuber 2303f3eb5384SStefan Weinhuber last_tidaw->flags |= 0x80; 2304f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2305f3eb5384SStefan Weinhuber 2306f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2307f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2308f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2309f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2310f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2311f3eb5384SStefan Weinhuber cqr->block = block; 2312f3eb5384SStefan Weinhuber cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2313f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2314f3eb5384SStefan Weinhuber cqr->retries = 256; 2315f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2316f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2317f3eb5384SStefan Weinhuber return cqr; 2318f3eb5384SStefan Weinhuber } 2319f3eb5384SStefan Weinhuber 2320f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2321f3eb5384SStefan Weinhuber struct dasd_block *block, 2322f3eb5384SStefan Weinhuber struct request *req) 2323f3eb5384SStefan Weinhuber { 2324f3eb5384SStefan Weinhuber int tpm, cmdrtd, cmdwtd; 2325f3eb5384SStefan Weinhuber int use_prefix; 232645b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2327f3eb5384SStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 232845b44d76SStefan Weinhuber #endif 232945b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2330f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2331f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2332f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2333f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2334f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2335f3eb5384SStefan Weinhuber int cdlspecial; 2336f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2337f3eb5384SStefan Weinhuber 2338f3eb5384SStefan Weinhuber basedev = block->base; 2339f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2340f3eb5384SStefan Weinhuber 2341f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2342f3eb5384SStefan Weinhuber blksize = block->bp_block; 2343f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 2344f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 234583096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2346f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2347f3eb5384SStefan Weinhuber last_rec = last_trk = 234883096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2349f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2350f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2351f3eb5384SStefan Weinhuber 2352f3eb5384SStefan Weinhuber /* is transport mode supported? */ 235345b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2354f3eb5384SStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 2355f3eb5384SStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 2356f3eb5384SStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 2357f3eb5384SStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 235845b44d76SStefan Weinhuber #else 235945b44d76SStefan Weinhuber tpm = 0; 236045b44d76SStefan Weinhuber #endif 2361f3eb5384SStefan Weinhuber 2362f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2363f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2364f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2365f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2366f3eb5384SStefan Weinhuber 2367f3eb5384SStefan Weinhuber cqr = NULL; 2368f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2369f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2370f3eb5384SStefan Weinhuber } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) { 2371f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2372f3eb5384SStefan Weinhuber first_rec, last_rec, 2373f3eb5384SStefan Weinhuber first_trk, last_trk, 2374f3eb5384SStefan Weinhuber first_offs, last_offs, 2375f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2376f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2377f3eb5384SStefan Weinhuber cqr = NULL; 2378f3eb5384SStefan Weinhuber } else if (use_prefix && 2379f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2380f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2381f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2382f3eb5384SStefan Weinhuber first_rec, last_rec, 2383f3eb5384SStefan Weinhuber first_trk, last_trk, 2384f3eb5384SStefan Weinhuber first_offs, last_offs, 2385f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2386f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2387f3eb5384SStefan Weinhuber cqr = NULL; 2388f3eb5384SStefan Weinhuber } 2389f3eb5384SStefan Weinhuber if (!cqr) 2390f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2391f3eb5384SStefan Weinhuber first_rec, last_rec, 2392f3eb5384SStefan Weinhuber first_trk, last_trk, 2393f3eb5384SStefan Weinhuber first_offs, last_offs, 2394f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2395f3eb5384SStefan Weinhuber return cqr; 2396f3eb5384SStefan Weinhuber } 2397f3eb5384SStefan Weinhuber 23981da177e4SLinus Torvalds static int 23991da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 24001da177e4SLinus Torvalds { 24011da177e4SLinus Torvalds struct dasd_eckd_private *private; 24021da177e4SLinus Torvalds struct ccw1 *ccw; 24035705f702SNeilBrown struct req_iterator iter; 24041da177e4SLinus Torvalds struct bio_vec *bv; 24051da177e4SLinus Torvalds char *dst, *cda; 24061da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 24071da177e4SLinus Torvalds sector_t recid; 24085705f702SNeilBrown int status; 24091da177e4SLinus Torvalds 24101da177e4SLinus Torvalds if (!dasd_page_cache) 24111da177e4SLinus Torvalds goto out; 24128e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 24138e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 24141da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 241583096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 24161da177e4SLinus Torvalds ccw = cqr->cpaddr; 24171da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 24181da177e4SLinus Torvalds ccw++; 24191da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 24201da177e4SLinus Torvalds ccw++; 24215705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 24221da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 24231da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 24241da177e4SLinus Torvalds /* Skip locate record. */ 24251da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 24261da177e4SLinus Torvalds ccw++; 24271da177e4SLinus Torvalds if (dst) { 24281da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 24291da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 24301da177e4SLinus Torvalds else 24311da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 24321da177e4SLinus Torvalds if (dst != cda) { 24331da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 24341da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 24351da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 24361da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 24371da177e4SLinus Torvalds } 24381da177e4SLinus Torvalds dst = NULL; 24391da177e4SLinus Torvalds } 24401da177e4SLinus Torvalds ccw++; 24411da177e4SLinus Torvalds recid++; 24421da177e4SLinus Torvalds } 24431da177e4SLinus Torvalds } 24441da177e4SLinus Torvalds out: 24451da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 24468e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 24471da177e4SLinus Torvalds return status; 24481da177e4SLinus Torvalds } 24491da177e4SLinus Torvalds 24508e09f215SStefan Weinhuber /* 2451f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 24528e09f215SStefan Weinhuber * 24538e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 24548e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 24558e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 24568e09f215SStefan Weinhuber */ 24578e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 24588e09f215SStefan Weinhuber { 24598e09f215SStefan Weinhuber struct ccw1 *ccw; 24608e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 2461f3eb5384SStefan Weinhuber struct tcw *tcw; 2462f3eb5384SStefan Weinhuber struct tccb *tccb; 2463f3eb5384SStefan Weinhuber struct dcw *dcw; 24648e09f215SStefan Weinhuber 2465f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 2466f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 2467f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 2468f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 2469f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2470f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 2471f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 2472f3eb5384SStefan Weinhuber } else { 24738e09f215SStefan Weinhuber ccw = cqr->cpaddr; 24748e09f215SStefan Weinhuber pfxdata = cqr->data; 24758e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 24768e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 24778e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 24788e09f215SStefan Weinhuber } 24798e09f215SStefan Weinhuber } 2480f3eb5384SStefan Weinhuber } 24818e09f215SStefan Weinhuber 24828e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 24838e09f215SStefan Weinhuber 24848e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 24858e09f215SStefan Weinhuber struct dasd_block *block, 24868e09f215SStefan Weinhuber struct request *req) 24878e09f215SStefan Weinhuber { 24888e09f215SStefan Weinhuber struct dasd_eckd_private *private; 24898e09f215SStefan Weinhuber struct dasd_device *startdev; 24908e09f215SStefan Weinhuber unsigned long flags; 24918e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 24928e09f215SStefan Weinhuber 24938e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 24948e09f215SStefan Weinhuber if (!startdev) 24958e09f215SStefan Weinhuber startdev = base; 24968e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 24978e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 24988e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 24998e09f215SStefan Weinhuber 25008e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 25018e09f215SStefan Weinhuber private->count++; 25028e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 25038e09f215SStefan Weinhuber if (IS_ERR(cqr)) 25048e09f215SStefan Weinhuber private->count--; 25058e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 25068e09f215SStefan Weinhuber return cqr; 25078e09f215SStefan Weinhuber } 25088e09f215SStefan Weinhuber 25098e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 25108e09f215SStefan Weinhuber struct request *req) 25118e09f215SStefan Weinhuber { 25128e09f215SStefan Weinhuber struct dasd_eckd_private *private; 25138e09f215SStefan Weinhuber unsigned long flags; 25148e09f215SStefan Weinhuber 25158e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 25168e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 25178e09f215SStefan Weinhuber private->count--; 25188e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 25198e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 25208e09f215SStefan Weinhuber } 25218e09f215SStefan Weinhuber 25221da177e4SLinus Torvalds static int 25231da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 25241da177e4SLinus Torvalds struct dasd_information2_t * info) 25251da177e4SLinus Torvalds { 25261da177e4SLinus Torvalds struct dasd_eckd_private *private; 25271da177e4SLinus Torvalds 25281da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 25291da177e4SLinus Torvalds info->label_block = 2; 25301da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 25311da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 25321da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 25331da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 25341da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 25354abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 25364abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 25374abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 25384abb08c2SStefan Weinhuber info->confdata_size); 25391da177e4SLinus Torvalds return 0; 25401da177e4SLinus Torvalds } 25411da177e4SLinus Torvalds 25421da177e4SLinus Torvalds /* 25431da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 25441da177e4SLinus Torvalds */ 25451da177e4SLinus Torvalds 25461da177e4SLinus Torvalds /* 25471da177e4SLinus Torvalds * Release device ioctl. 25481da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 25491da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 25501da177e4SLinus Torvalds */ 25511da177e4SLinus Torvalds static int 25521107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 25531da177e4SLinus Torvalds { 25541da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 25551da177e4SLinus Torvalds int rc; 2556f3eb5384SStefan Weinhuber struct ccw1 *ccw; 25571da177e4SLinus Torvalds 25581da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 25591da177e4SLinus Torvalds return -EACCES; 25601da177e4SLinus Torvalds 25611da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 25621da177e4SLinus Torvalds 1, 32, device); 25631da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2564fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 25651da177e4SLinus Torvalds "Could not allocate initialization request"); 25661da177e4SLinus Torvalds return PTR_ERR(cqr); 25671da177e4SLinus Torvalds } 2568f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2569f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2570f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2571f3eb5384SStefan Weinhuber ccw->count = 32; 2572f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 25738e09f215SStefan Weinhuber cqr->startdev = device; 25748e09f215SStefan Weinhuber cqr->memdev = device; 25751da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 25761c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2577336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 25781da177e4SLinus Torvalds cqr->expires = 2 * HZ; 25791da177e4SLinus Torvalds cqr->buildclk = get_clock(); 25801da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 25811da177e4SLinus Torvalds 25821da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 25831da177e4SLinus Torvalds 25848e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 25851da177e4SLinus Torvalds return rc; 25861da177e4SLinus Torvalds } 25871da177e4SLinus Torvalds 25881da177e4SLinus Torvalds /* 25891da177e4SLinus Torvalds * Reserve device ioctl. 25901da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 25911da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 25921da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 25931da177e4SLinus Torvalds */ 25941da177e4SLinus Torvalds static int 25951107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 25961da177e4SLinus Torvalds { 25971da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 25981da177e4SLinus Torvalds int rc; 2599f3eb5384SStefan Weinhuber struct ccw1 *ccw; 26001da177e4SLinus Torvalds 26011da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26021da177e4SLinus Torvalds return -EACCES; 26031da177e4SLinus Torvalds 26041da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 26051da177e4SLinus Torvalds 1, 32, device); 26061da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2607fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 26081da177e4SLinus Torvalds "Could not allocate initialization request"); 26091da177e4SLinus Torvalds return PTR_ERR(cqr); 26101da177e4SLinus Torvalds } 2611f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2612f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2613f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2614f3eb5384SStefan Weinhuber ccw->count = 32; 2615f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 26168e09f215SStefan Weinhuber cqr->startdev = device; 26178e09f215SStefan Weinhuber cqr->memdev = device; 26181da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 26191c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2620336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 26211da177e4SLinus Torvalds cqr->expires = 2 * HZ; 26221da177e4SLinus Torvalds cqr->buildclk = get_clock(); 26231da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 26241da177e4SLinus Torvalds 26251da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 26261da177e4SLinus Torvalds 26278e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 26281da177e4SLinus Torvalds return rc; 26291da177e4SLinus Torvalds } 26301da177e4SLinus Torvalds 26311da177e4SLinus Torvalds /* 26321da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 26331da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 26341da177e4SLinus Torvalds * (unconditional reserve) 26351da177e4SLinus Torvalds */ 26361da177e4SLinus Torvalds static int 26371107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 26381da177e4SLinus Torvalds { 26391da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26401da177e4SLinus Torvalds int rc; 2641f3eb5384SStefan Weinhuber struct ccw1 *ccw; 26421da177e4SLinus Torvalds 26431da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26441da177e4SLinus Torvalds return -EACCES; 26451da177e4SLinus Torvalds 26461da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 26471da177e4SLinus Torvalds 1, 32, device); 26481da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2649fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 26501da177e4SLinus Torvalds "Could not allocate initialization request"); 26511da177e4SLinus Torvalds return PTR_ERR(cqr); 26521da177e4SLinus Torvalds } 2653f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2654f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 2655f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2656f3eb5384SStefan Weinhuber ccw->count = 32; 2657f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 26588e09f215SStefan Weinhuber cqr->startdev = device; 26598e09f215SStefan Weinhuber cqr->memdev = device; 26601da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 26611c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2662336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 26631da177e4SLinus Torvalds cqr->expires = 2 * HZ; 26641da177e4SLinus Torvalds cqr->buildclk = get_clock(); 26651da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 26661da177e4SLinus Torvalds 26671da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 26681da177e4SLinus Torvalds 26698e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 26701da177e4SLinus Torvalds return rc; 26711da177e4SLinus Torvalds } 26721da177e4SLinus Torvalds 26731da177e4SLinus Torvalds /* 26741da177e4SLinus Torvalds * Read performance statistics 26751da177e4SLinus Torvalds */ 26761da177e4SLinus Torvalds static int 26771107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 26781da177e4SLinus Torvalds { 26791da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 26801da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 26811da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26821da177e4SLinus Torvalds struct ccw1 *ccw; 26831da177e4SLinus Torvalds int rc; 26841da177e4SLinus Torvalds 26851da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 26861da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 26871da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 26881da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 26891da177e4SLinus Torvalds device); 26901da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2691fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 26921da177e4SLinus Torvalds "Could not allocate initialization request"); 26931da177e4SLinus Torvalds return PTR_ERR(cqr); 26941da177e4SLinus Torvalds } 26958e09f215SStefan Weinhuber cqr->startdev = device; 26968e09f215SStefan Weinhuber cqr->memdev = device; 26971da177e4SLinus Torvalds cqr->retries = 0; 26981da177e4SLinus Torvalds cqr->expires = 10 * HZ; 26991da177e4SLinus Torvalds 27001da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 27011da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 27021da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 27031da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 27045d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 27051da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 27061da177e4SLinus Torvalds 27071da177e4SLinus Torvalds ccw = cqr->cpaddr; 27081da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 27091da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 27101da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 27111da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 27121da177e4SLinus Torvalds 27131da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 27141da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 27151da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 27161da177e4SLinus Torvalds 27171da177e4SLinus Torvalds ccw++; 27181da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 27191da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 27201da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 27211da177e4SLinus Torvalds 27221da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27231da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27241da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 27251da177e4SLinus Torvalds if (rc == 0) { 27261da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 27271da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 27281107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 27291107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 27301107ccfbSChristoph Hellwig rc = -EFAULT; 27311da177e4SLinus Torvalds } 27328e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27331da177e4SLinus Torvalds return rc; 27341da177e4SLinus Torvalds } 27351da177e4SLinus Torvalds 27361da177e4SLinus Torvalds /* 27371da177e4SLinus Torvalds * Get attributes (cache operations) 27381da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 27391da177e4SLinus Torvalds */ 27401da177e4SLinus Torvalds static int 27411107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 27421da177e4SLinus Torvalds { 27431107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 27441107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 27451107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 27461da177e4SLinus Torvalds int rc; 27471da177e4SLinus Torvalds 27481da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27491da177e4SLinus Torvalds return -EACCES; 27501107ccfbSChristoph Hellwig if (!argp) 27511da177e4SLinus Torvalds return -EINVAL; 27521da177e4SLinus Torvalds 27531107ccfbSChristoph Hellwig rc = 0; 27541107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 27551107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 27561107ccfbSChristoph Hellwig rc = -EFAULT; 27571da177e4SLinus Torvalds 27581da177e4SLinus Torvalds return rc; 27591da177e4SLinus Torvalds } 27601da177e4SLinus Torvalds 27611da177e4SLinus Torvalds /* 27621da177e4SLinus Torvalds * Set attributes (cache operations) 27631da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 27641da177e4SLinus Torvalds */ 27651da177e4SLinus Torvalds static int 27661107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 27671da177e4SLinus Torvalds { 27681107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 27691107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 27701da177e4SLinus Torvalds struct attrib_data_t attrib; 27711da177e4SLinus Torvalds 27721da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27731da177e4SLinus Torvalds return -EACCES; 27741107ccfbSChristoph Hellwig if (!argp) 27751da177e4SLinus Torvalds return -EINVAL; 27761da177e4SLinus Torvalds 27771107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 27781da177e4SLinus Torvalds return -EFAULT; 27791da177e4SLinus Torvalds private->attrib = attrib; 27801da177e4SLinus Torvalds 2781fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2782fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 27831da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 27841da177e4SLinus Torvalds return 0; 27851da177e4SLinus Torvalds } 27861da177e4SLinus Torvalds 2787ab1d848fSNigel Hislop /* 2788ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 2789ab1d848fSNigel Hislop * CCWs are PSF and RSSD 2790ab1d848fSNigel Hislop */ 2791ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2792ab1d848fSNigel Hislop { 2793ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 2794ab1d848fSNigel Hislop char *psf_data, *rssd_result; 2795ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 2796ab1d848fSNigel Hislop struct ccw1 *ccw; 2797ab1d848fSNigel Hislop int rc; 2798ab1d848fSNigel Hislop 2799ab1d848fSNigel Hislop /* Copy parms from caller */ 2800ab1d848fSNigel Hislop rc = -EFAULT; 2801ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2802ab1d848fSNigel Hislop goto out; 2803ab1d848fSNigel Hislop #ifndef CONFIG_64BIT 2804ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 2805ab1d848fSNigel Hislop if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) { 2806ab1d848fSNigel Hislop rc = -EINVAL; 2807ab1d848fSNigel Hislop goto out; 2808ab1d848fSNigel Hislop } 2809ab1d848fSNigel Hislop #endif 2810ab1d848fSNigel Hislop /* alloc I/O data area */ 2811ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2812ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2813ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 2814ab1d848fSNigel Hislop rc = -ENOMEM; 2815ab1d848fSNigel Hislop goto out_free; 2816ab1d848fSNigel Hislop } 2817ab1d848fSNigel Hislop 2818ab1d848fSNigel Hislop /* get syscall header from user space */ 2819ab1d848fSNigel Hislop rc = -EFAULT; 2820ab1d848fSNigel Hislop if (copy_from_user(psf_data, 2821ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 2822ab1d848fSNigel Hislop usrparm.psf_data_len)) 2823ab1d848fSNigel Hislop goto out_free; 2824ab1d848fSNigel Hislop 2825ab1d848fSNigel Hislop /* sanity check on syscall header */ 2826ab1d848fSNigel Hislop if (psf_data[0] != 0x17 && psf_data[1] != 0xce) { 2827ab1d848fSNigel Hislop rc = -EINVAL; 2828ab1d848fSNigel Hislop goto out_free; 2829ab1d848fSNigel Hislop } 2830ab1d848fSNigel Hislop 2831ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 2832ab1d848fSNigel Hislop cqr = dasd_smalloc_request("ECKD", 2 , 0, device); 2833ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 2834fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2835ab1d848fSNigel Hislop "Could not allocate initialization request"); 2836ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 2837ab1d848fSNigel Hislop goto out_free; 2838ab1d848fSNigel Hislop } 2839ab1d848fSNigel Hislop 2840ab1d848fSNigel Hislop cqr->startdev = device; 2841ab1d848fSNigel Hislop cqr->memdev = device; 2842ab1d848fSNigel Hislop cqr->retries = 3; 2843ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 2844ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 2845ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 2846ab1d848fSNigel Hislop 2847ab1d848fSNigel Hislop /* Build the ccws */ 2848ab1d848fSNigel Hislop ccw = cqr->cpaddr; 2849ab1d848fSNigel Hislop 2850ab1d848fSNigel Hislop /* PSF ccw */ 2851ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 2852ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 2853ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 2854ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 2855ab1d848fSNigel Hislop 2856ab1d848fSNigel Hislop ccw++; 2857ab1d848fSNigel Hislop 2858ab1d848fSNigel Hislop /* RSSD ccw */ 2859ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2860ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 2861ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 2862ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 2863ab1d848fSNigel Hislop 2864ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 2865ab1d848fSNigel Hislop if (rc) 2866ab1d848fSNigel Hislop goto out_sfree; 2867ab1d848fSNigel Hislop 2868ab1d848fSNigel Hislop rc = -EFAULT; 2869ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 2870ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 2871ab1d848fSNigel Hislop goto out_sfree; 2872ab1d848fSNigel Hislop rc = 0; 2873ab1d848fSNigel Hislop 2874ab1d848fSNigel Hislop out_sfree: 2875ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 2876ab1d848fSNigel Hislop out_free: 2877ab1d848fSNigel Hislop kfree(rssd_result); 2878ab1d848fSNigel Hislop kfree(psf_data); 2879ab1d848fSNigel Hislop out: 2880ab1d848fSNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc); 2881ab1d848fSNigel Hislop return rc; 2882ab1d848fSNigel Hislop } 2883ab1d848fSNigel Hislop 28841107ccfbSChristoph Hellwig static int 28858e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 28861107ccfbSChristoph Hellwig { 28878e09f215SStefan Weinhuber struct dasd_device *device = block->base; 28888e09f215SStefan Weinhuber 28891107ccfbSChristoph Hellwig switch (cmd) { 28901107ccfbSChristoph Hellwig case BIODASDGATTR: 28911107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 28921107ccfbSChristoph Hellwig case BIODASDSATTR: 28931107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 28941107ccfbSChristoph Hellwig case BIODASDPSRD: 28951107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 28961107ccfbSChristoph Hellwig case BIODASDRLSE: 28971107ccfbSChristoph Hellwig return dasd_eckd_release(device); 28981107ccfbSChristoph Hellwig case BIODASDRSRV: 28991107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 29001107ccfbSChristoph Hellwig case BIODASDSLCK: 29011107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 2902ab1d848fSNigel Hislop case BIODASDSYMMIO: 2903ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 29041107ccfbSChristoph Hellwig default: 29051107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 29061107ccfbSChristoph Hellwig } 29071107ccfbSChristoph Hellwig } 29081107ccfbSChristoph Hellwig 29091da177e4SLinus Torvalds /* 2910445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 2911445b5b49SHorst Hummel * and return number of printed chars. 2912445b5b49SHorst Hummel */ 29134d284cacSHeiko Carstens static int 2914445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 2915445b5b49SHorst Hummel { 2916445b5b49SHorst Hummel int len, count; 2917445b5b49SHorst Hummel char *datap; 2918445b5b49SHorst Hummel 2919445b5b49SHorst Hummel len = 0; 2920445b5b49SHorst Hummel while (from <= to) { 2921445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2922445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 2923445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 2924445b5b49SHorst Hummel 2925445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 2926445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 2927445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 2928445b5b49SHorst Hummel else 2929445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 2930445b5b49SHorst Hummel 2931445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 2932445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 2933445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 2934445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 2935445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 2936445b5b49SHorst Hummel } 2937445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 2938445b5b49SHorst Hummel from++; 2939445b5b49SHorst Hummel } 2940445b5b49SHorst Hummel return len; 2941445b5b49SHorst Hummel } 2942445b5b49SHorst Hummel 2943fc19f381SStefan Haberland static void 2944fc19f381SStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct dasd_ccw_req *req, 2945fc19f381SStefan Haberland struct irb *irb, char *reason) 2946fc19f381SStefan Haberland { 2947fc19f381SStefan Haberland u64 *sense; 2948fc19f381SStefan Haberland int sl; 2949fc19f381SStefan Haberland struct tsb *tsb; 2950fc19f381SStefan Haberland 2951fc19f381SStefan Haberland sense = NULL; 2952fc19f381SStefan Haberland tsb = NULL; 2953fc19f381SStefan Haberland if (req && scsw_is_tm(&req->irb.scsw)) { 2954fc19f381SStefan Haberland if (irb->scsw.tm.tcw) 2955fc19f381SStefan Haberland tsb = tcw_get_tsb( 2956fc19f381SStefan Haberland (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 2957fc19f381SStefan Haberland if (tsb && (irb->scsw.tm.fcxs == 0x01)) { 2958fc19f381SStefan Haberland switch (tsb->flags & 0x07) { 2959fc19f381SStefan Haberland case 1: /* tsa_iostat */ 2960fc19f381SStefan Haberland sense = (u64 *)tsb->tsa.iostat.sense; 2961fc19f381SStefan Haberland break; 2962fc19f381SStefan Haberland case 2: /* ts_ddpc */ 2963fc19f381SStefan Haberland sense = (u64 *)tsb->tsa.ddpc.sense; 2964fc19f381SStefan Haberland break; 2965fc19f381SStefan Haberland case 3: /* tsa_intrg */ 2966fc19f381SStefan Haberland break; 2967fc19f381SStefan Haberland } 2968fc19f381SStefan Haberland } 2969fc19f381SStefan Haberland } else { 2970fc19f381SStefan Haberland if (irb->esw.esw0.erw.cons) 2971fc19f381SStefan Haberland sense = (u64 *)irb->ecw; 2972fc19f381SStefan Haberland } 2973fc19f381SStefan Haberland if (sense) { 2974fc19f381SStefan Haberland for (sl = 0; sl < 4; sl++) { 2975fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, 2976fc19f381SStefan Haberland "%s: %016llx %016llx %016llx %016llx", 2977fc19f381SStefan Haberland reason, sense[0], sense[1], sense[2], 2978fc19f381SStefan Haberland sense[3]); 2979fc19f381SStefan Haberland } 2980fc19f381SStefan Haberland } else { 2981fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, "%s", 2982fc19f381SStefan Haberland "SORRY - NO VALID SENSE AVAILABLE\n"); 2983fc19f381SStefan Haberland } 2984fc19f381SStefan Haberland } 2985fc19f381SStefan Haberland 2986445b5b49SHorst Hummel /* 29871da177e4SLinus Torvalds * Print sense data and related channel program. 29881da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 29891da177e4SLinus Torvalds */ 2990f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 29918e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 29921da177e4SLinus Torvalds { 29931da177e4SLinus Torvalds char *page; 2994445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 2995445b5b49SHorst Hummel int len, sl, sct; 29961da177e4SLinus Torvalds 29971da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 29981da177e4SLinus Torvalds if (page == NULL) { 2999fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3000fc19f381SStefan Haberland "No memory to dump sense data\n"); 30011da177e4SLinus Torvalds return; 30021da177e4SLinus Torvalds } 3003445b5b49SHorst Hummel /* dump the sense data */ 30041da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 30051da177e4SLinus Torvalds " I/O status report for device %s:\n", 30062a0217d5SKay Sievers dev_name(&device->cdev->dev)); 30071da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30086cc7f168SStefan Weinhuber " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n", 30096cc7f168SStefan Weinhuber req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 30106cc7f168SStefan Weinhuber scsw_cc(&irb->scsw), req->intrc); 30111da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30121da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 30132a0217d5SKay Sievers dev_name(&device->cdev->dev), 301423d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 30151da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 30161da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 30171da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30181da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 30191da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 30201da177e4SLinus Torvalds 30211da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 30221da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 30231da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 30241da177e4SLinus Torvalds } 30251da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 30261da177e4SLinus Torvalds } 30271da177e4SLinus Torvalds 30281da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 30291da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3030445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 30311da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 30321da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 30331da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 30341da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 30351da177e4SLinus Torvalds } else { 30361da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3037445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 30381da177e4SLinus Torvalds " 32 Byte: Format: %x " 30391da177e4SLinus Torvalds "Exception class %x\n", 30401da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 30411da177e4SLinus Torvalds } 30421da177e4SLinus Torvalds } else { 3043445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 30441da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 30451da177e4SLinus Torvalds } 3046445b5b49SHorst Hummel printk("%s", page); 30471da177e4SLinus Torvalds 30488e09f215SStefan Weinhuber if (req) { 30498e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3050445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3051445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3052445b5b49SHorst Hummel first = req->cpaddr; 3053445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3054445b5b49SHorst Hummel to = min(first + 6, last); 30551da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 30561da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3057445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3058445b5b49SHorst Hummel printk("%s", page); 30591da177e4SLinus Torvalds 3060445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3061445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 30621da177e4SLinus Torvalds len = 0; 3063445b5b49SHorst Hummel from = ++to; 306423d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 306523d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3066445b5b49SHorst Hummel if (from < fail - 2) { 3067445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3068445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 30691da177e4SLinus Torvalds } 3070445b5b49SHorst Hummel to = min(fail + 1, last); 3071445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 30721da177e4SLinus Torvalds 3073445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3074445b5b49SHorst Hummel from = max(from, ++to); 3075445b5b49SHorst Hummel if (from < last - 1) { 3076445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 30771da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 30781da177e4SLinus Torvalds } 3079445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 30801da177e4SLinus Torvalds if (len > 0) 3081445b5b49SHorst Hummel printk("%s", page); 30828e09f215SStefan Weinhuber } 30831da177e4SLinus Torvalds free_page((unsigned long) page); 30841da177e4SLinus Torvalds } 30851da177e4SLinus Torvalds 3086f3eb5384SStefan Weinhuber 3087f3eb5384SStefan Weinhuber /* 3088f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3089f3eb5384SStefan Weinhuber */ 3090f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3091f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3092f3eb5384SStefan Weinhuber { 3093f3eb5384SStefan Weinhuber char *page; 3094f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3095f3eb5384SStefan Weinhuber 3096f3eb5384SStefan Weinhuber struct tsb *tsb; 3097f3eb5384SStefan Weinhuber u8 *sense; 3098f3eb5384SStefan Weinhuber 3099f3eb5384SStefan Weinhuber 3100f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3101f3eb5384SStefan Weinhuber if (page == NULL) { 3102fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3103f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3104f3eb5384SStefan Weinhuber return; 3105f3eb5384SStefan Weinhuber } 3106f3eb5384SStefan Weinhuber /* dump the sense data */ 3107f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3108f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3109f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3110f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 31116cc7f168SStefan Weinhuber " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d " 3112f3eb5384SStefan Weinhuber "fcxs: 0x%02X schxs: 0x%02X\n", req, 3113f3eb5384SStefan Weinhuber scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 31146cc7f168SStefan Weinhuber scsw_cc(&irb->scsw), req->intrc, 3115f3eb5384SStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs); 3116f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3117f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3118f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3119f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3120f3eb5384SStefan Weinhuber 3121f3eb5384SStefan Weinhuber tsb = NULL; 3122f3eb5384SStefan Weinhuber sense = NULL; 3123f3eb5384SStefan Weinhuber if (irb->scsw.tm.tcw) 3124f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3125f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3126f3eb5384SStefan Weinhuber 3127f3eb5384SStefan Weinhuber if (tsb && (irb->scsw.tm.fcxs == 0x01)) { 3128f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3129f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3130f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3131f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3132f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3133f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3134f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3135f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3136f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3137f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3138f3eb5384SStefan Weinhuber " residual %d\n", residual); 3139f3eb5384SStefan Weinhuber 3140f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3141f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3142f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3143f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3144f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3145f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3146f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3147f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3148f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3149f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3150f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3151f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3152f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3153f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3154f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3155f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3156f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3157f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3158f3eb5384SStefan Weinhuber break; 3159f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3160f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3161f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3162f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3163f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rcq: "); 3164f3eb5384SStefan Weinhuber for (sl = 0; sl < 16; sl++) { 3165f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3166f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3167f3eb5384SStefan Weinhuber tsb->tsa.ddpc.rcq[sl]); 3168f3eb5384SStefan Weinhuber } 3169f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3170f3eb5384SStefan Weinhuber } 3171f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3172f3eb5384SStefan Weinhuber break; 3173f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3174f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3175f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3176f3eb5384SStefan Weinhuber break; 3177f3eb5384SStefan Weinhuber } 3178f3eb5384SStefan Weinhuber 3179f3eb5384SStefan Weinhuber if (sense) { 3180f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3181f3eb5384SStefan Weinhuber len += sprintf(page + len, 3182f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3183f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3184f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3185f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3186f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3187f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3188f3eb5384SStefan Weinhuber } 3189f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3190f3eb5384SStefan Weinhuber } 3191f3eb5384SStefan Weinhuber 3192f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3193f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3194f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3195f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3196f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3197f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3198f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3199f3eb5384SStefan Weinhuber } else { 3200f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3201f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3202f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3203f3eb5384SStefan Weinhuber "Exception class %x\n", 3204f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3205f3eb5384SStefan Weinhuber } 3206f3eb5384SStefan Weinhuber } else { 3207f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3208f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3209f3eb5384SStefan Weinhuber } 3210f3eb5384SStefan Weinhuber } else { 3211f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3212f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3213f3eb5384SStefan Weinhuber } 3214f3eb5384SStefan Weinhuber printk("%s", page); 3215f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3216f3eb5384SStefan Weinhuber } 3217f3eb5384SStefan Weinhuber 3218f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3219f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3220f3eb5384SStefan Weinhuber { 3221f3eb5384SStefan Weinhuber if (req && scsw_is_tm(&req->irb.scsw)) 3222f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3223f3eb5384SStefan Weinhuber else 3224f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3225f3eb5384SStefan Weinhuber } 3226f3eb5384SStefan Weinhuber 3227d41dd122SStefan Haberland int dasd_eckd_pm_freeze(struct dasd_device *device) 3228d41dd122SStefan Haberland { 3229d41dd122SStefan Haberland /* 3230d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3231d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3232d41dd122SStefan Haberland * information like PAV support that might have changed 3233d41dd122SStefan Haberland */ 3234d41dd122SStefan Haberland dasd_alias_remove_device(device); 3235d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3236d41dd122SStefan Haberland 3237d41dd122SStefan Haberland return 0; 3238d41dd122SStefan Haberland } 3239d41dd122SStefan Haberland 3240d41dd122SStefan Haberland int dasd_eckd_restore_device(struct dasd_device *device) 3241d41dd122SStefan Haberland { 3242d41dd122SStefan Haberland struct dasd_eckd_private *private; 3243d41dd122SStefan Haberland int is_known, rc; 3244d41dd122SStefan Haberland struct dasd_uid temp_uid; 3245d41dd122SStefan Haberland 3246d41dd122SStefan Haberland /* allow new IO again */ 3247d41dd122SStefan Haberland device->stopped &= ~DASD_STOPPED_PM; 3248d41dd122SStefan Haberland 3249d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3250d41dd122SStefan Haberland 3251d41dd122SStefan Haberland /* Read Configuration Data */ 3252d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3253d41dd122SStefan Haberland if (rc) 3254d41dd122SStefan Haberland goto out_err; 3255d41dd122SStefan Haberland 3256d41dd122SStefan Haberland /* Generate device unique id and register in devmap */ 3257d41dd122SStefan Haberland rc = dasd_eckd_generate_uid(device, &private->uid); 3258d41dd122SStefan Haberland dasd_get_uid(device->cdev, &temp_uid); 3259d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3260d41dd122SStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has changed\n"); 3261d41dd122SStefan Haberland if (rc) 3262d41dd122SStefan Haberland goto out_err; 3263d41dd122SStefan Haberland dasd_set_uid(device->cdev, &private->uid); 3264d41dd122SStefan Haberland 3265d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3266d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3267d41dd122SStefan Haberland if (is_known < 0) 3268d41dd122SStefan Haberland return is_known; 3269d41dd122SStefan Haberland if (!is_known) { 3270d41dd122SStefan Haberland /* new lcu found */ 3271d41dd122SStefan Haberland rc = dasd_eckd_validate_server(device); /* will switch pav on */ 3272d41dd122SStefan Haberland if (rc) 3273d41dd122SStefan Haberland goto out_err; 3274d41dd122SStefan Haberland } 3275d41dd122SStefan Haberland 3276d41dd122SStefan Haberland /* Read Feature Codes */ 3277d41dd122SStefan Haberland rc = dasd_eckd_read_features(device); 3278d41dd122SStefan Haberland if (rc) 3279d41dd122SStefan Haberland goto out_err; 3280d41dd122SStefan Haberland 3281d41dd122SStefan Haberland /* Read Device Characteristics */ 3282d41dd122SStefan Haberland memset(&private->rdc_data, 0, sizeof(private->rdc_data)); 3283d41dd122SStefan Haberland rc = dasd_generic_read_dev_chars(device, "ECKD", 3284d41dd122SStefan Haberland &private->rdc_data, 64); 3285d41dd122SStefan Haberland if (rc) { 3286d41dd122SStefan Haberland DBF_EVENT(DBF_WARNING, 3287d41dd122SStefan Haberland "Read device characteristics failed, rc=%d for " 3288d41dd122SStefan Haberland "device: %s", rc, dev_name(&device->cdev->dev)); 3289d41dd122SStefan Haberland goto out_err; 3290d41dd122SStefan Haberland } 3291d41dd122SStefan Haberland 3292d41dd122SStefan Haberland /* add device to alias management */ 3293d41dd122SStefan Haberland dasd_alias_add_device(device); 3294d41dd122SStefan Haberland 3295d41dd122SStefan Haberland return 0; 3296d41dd122SStefan Haberland 3297d41dd122SStefan Haberland out_err: 3298d41dd122SStefan Haberland /* 3299d41dd122SStefan Haberland * if the resume failed for the DASD we put it in 3300d41dd122SStefan Haberland * an UNRESUMED stop state 3301d41dd122SStefan Haberland */ 3302d41dd122SStefan Haberland device->stopped |= DASD_UNRESUMED_PM; 3303d41dd122SStefan Haberland return 0; 3304d41dd122SStefan Haberland } 3305d41dd122SStefan Haberland 3306d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 3307d41dd122SStefan Haberland .name = "dasd-eckd", 3308d41dd122SStefan Haberland .owner = THIS_MODULE, 3309d41dd122SStefan Haberland .ids = dasd_eckd_ids, 3310d41dd122SStefan Haberland .probe = dasd_eckd_probe, 3311d41dd122SStefan Haberland .remove = dasd_generic_remove, 3312d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 3313d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 3314d41dd122SStefan Haberland .notify = dasd_generic_notify, 3315d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 3316d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 3317d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 3318d41dd122SStefan Haberland }; 3319f3eb5384SStefan Weinhuber 33201da177e4SLinus Torvalds /* 33211da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 33221da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 33231da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 33241da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 33251da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 33261da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 33271da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 33281da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 33291da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 33301da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 33311da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 33321da177e4SLinus Torvalds */ 33331da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 33341da177e4SLinus Torvalds .owner = THIS_MODULE, 33351da177e4SLinus Torvalds .name = "ECKD", 33361da177e4SLinus Torvalds .ebcname = "ECKD", 33371da177e4SLinus Torvalds .max_blocks = 240, 33381da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 33398e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 33401da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 33418e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 33428e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 33431da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 33441da177e4SLinus Torvalds .start_IO = dasd_start_IO, 33451da177e4SLinus Torvalds .term_IO = dasd_term_IO, 33468e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 33471da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 33481da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 33491da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 33508e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 33518e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 33528e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 33531da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 3354fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 33551da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 33561107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 3357d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 3358d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 33591da177e4SLinus Torvalds }; 33601da177e4SLinus Torvalds 33611da177e4SLinus Torvalds static int __init 33621da177e4SLinus Torvalds dasd_eckd_init(void) 33631da177e4SLinus Torvalds { 3364736e6ea0SSebastian Ott int ret; 3365736e6ea0SSebastian Ott 33661da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 3367736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 3368736e6ea0SSebastian Ott if (!ret) 3369736e6ea0SSebastian Ott wait_for_device_probe(); 3370736e6ea0SSebastian Ott 3371736e6ea0SSebastian Ott return ret; 33721da177e4SLinus Torvalds } 33731da177e4SLinus Torvalds 33741da177e4SLinus Torvalds static void __exit 33751da177e4SLinus Torvalds dasd_eckd_cleanup(void) 33761da177e4SLinus Torvalds { 33771da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 33781da177e4SLinus Torvalds } 33791da177e4SLinus Torvalds 33801da177e4SLinus Torvalds module_init(dasd_eckd_init); 33811da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 3382