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 13ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 14fc19f381SStefan Haberland 151da177e4SLinus Torvalds #include <linux/stddef.h> 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 191da177e4SLinus Torvalds #include <linux/bio.h> 201da177e4SLinus Torvalds #include <linux/module.h> 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> 26f8b06859SHeiko Carstens #include <asm/compat.h> 271da177e4SLinus Torvalds #include <asm/io.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 81eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 82eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 83eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 84eb6e199bSStefan Weinhuber 85eb6e199bSStefan Weinhuber 861da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 871da177e4SLinus Torvalds * the other detection code is gone */ 881da177e4SLinus Torvalds static int 891da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds int ret; 921da177e4SLinus Torvalds 9340545573SHorst Hummel /* set ECKD specific ccw-device options */ 94454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 95454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 9640545573SHorst Hummel if (ret) { 97b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 98b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 99b8ed5dd5SStefan Haberland "ccw-device options"); 1001da177e4SLinus Torvalds return ret; 10140545573SHorst Hummel } 10240545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 10340545573SHorst Hummel return ret; 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds static int 1071da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1131da177e4SLinus Torvalds #define LABEL_SIZE 140 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds static inline unsigned int 1161da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1171da177e4SLinus Torvalds { 1181da177e4SLinus Torvalds int rem = no % mult; 1191da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds static inline unsigned int 1231da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1241da177e4SLinus Torvalds { 1251da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds 1284d284cacSHeiko Carstens static unsigned int 1291da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1301da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1311da177e4SLinus Torvalds { 1321da177e4SLinus Torvalds int dn, kn; 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds switch (rdc->dev_type) { 1351da177e4SLinus Torvalds case 0x3380: 1361da177e4SLinus Torvalds if (kl) 1371da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1381da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1391da177e4SLinus Torvalds else 1401da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1411da177e4SLinus Torvalds case 0x3390: 1421da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1431da177e4SLinus Torvalds if (kl) { 1441da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1451da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1461da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1471da177e4SLinus Torvalds } else 1481da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1491da177e4SLinus Torvalds case 0x9345: 1501da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1511da177e4SLinus Torvalds if (kl) { 1521da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1531da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1541da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1551da177e4SLinus Torvalds } else 1561da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds return 0; 1591da177e4SLinus Torvalds } 1601da177e4SLinus Torvalds 161b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 162b44b0ab3SStefan Weinhuber { 163b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 164b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 165b44b0ab3SStefan Weinhuber geo->head <<= 4; 166b44b0ab3SStefan Weinhuber geo->head |= head; 167b44b0ab3SStefan Weinhuber } 168b44b0ab3SStefan Weinhuber 1694d284cacSHeiko Carstens static int 1701da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1711da177e4SLinus Torvalds struct DE_eckd_data *data, 1721da177e4SLinus Torvalds struct dasd_device *device) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds struct dasd_eckd_private *private; 175d54853efSMartin Schwidefsky int rc; 1761da177e4SLinus Torvalds 1771da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 178d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 179d54853efSMartin Schwidefsky return 0; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 1821da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 1831da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 1841da177e4SLinus Torvalds 185d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 186d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 187d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 188d54853efSMartin Schwidefsky rc = 0; 1891da177e4SLinus Torvalds 1901da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 1911da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 192d54853efSMartin Schwidefsky return rc; 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds 1954d284cacSHeiko Carstens static int 196b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 197b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 1981da177e4SLinus Torvalds { 1991da177e4SLinus Torvalds struct dasd_eckd_private *private; 200b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 201b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 202d54853efSMartin Schwidefsky int rc = 0; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2071da177e4SLinus Torvalds ccw->flags = 0; 2081da177e4SLinus Torvalds ccw->count = 16; 2091da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2121da177e4SLinus Torvalds switch (cmd) { 2131da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2141da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2151da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2161da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2171da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2181da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2191da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2201da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2211da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2221da177e4SLinus Torvalds data->mask.perm = 0x1; 2231da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2241da177e4SLinus Torvalds break; 2251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2261da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2271da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2281da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2291da177e4SLinus Torvalds data->mask.perm = 0x02; 2301da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 231d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2321da177e4SLinus Torvalds break; 2331da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2341da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2351da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 236d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2371da177e4SLinus Torvalds break; 2381da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2391da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2401da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2411da177e4SLinus Torvalds data->mask.perm = 0x3; 2421da177e4SLinus Torvalds data->mask.auth = 0x1; 2431da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 244d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2451da177e4SLinus Torvalds break; 2461da177e4SLinus Torvalds default: 247fc19f381SStefan Haberland dev_err(&device->cdev->dev, 248fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2491da177e4SLinus Torvalds break; 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2551da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2561da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2571da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2581da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2591da177e4SLinus Torvalds 260b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 261b44b0ab3SStefan Weinhuber begcyl = trk / heads; 262b44b0ab3SStefan Weinhuber beghead = trk % heads; 263b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 264b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2671da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2681da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2691da177e4SLinus Torvalds 270b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 271b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 2721da177e4SLinus Torvalds else 273b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 276b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 277b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 278d54853efSMartin Schwidefsky return rc; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2818e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 2828e09f215SStefan Weinhuber struct dasd_device *device) 2838e09f215SStefan Weinhuber { 2848e09f215SStefan Weinhuber struct dasd_eckd_private *private; 2858e09f215SStefan Weinhuber int rc; 2868e09f215SStefan Weinhuber 2878e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 2888e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 2898e09f215SStefan Weinhuber return 0; 2908e09f215SStefan Weinhuber 2918e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 292f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 293f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 2948e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 2958e09f215SStefan Weinhuber 296f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 2978e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 2988e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 2998e09f215SStefan Weinhuber rc = 0; 3008e09f215SStefan Weinhuber return rc; 3018e09f215SStefan Weinhuber } 3028e09f215SStefan Weinhuber 303f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 304f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 305f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 306f3eb5384SStefan Weinhuber unsigned int tlf) 307f3eb5384SStefan Weinhuber { 308f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 309f3eb5384SStefan Weinhuber int sector; 310f3eb5384SStefan Weinhuber int dn, d; 311f3eb5384SStefan Weinhuber 312f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 313f3eb5384SStefan Weinhuber 314f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 315f3eb5384SStefan Weinhuber sector = 0; 316f3eb5384SStefan Weinhuber if (rec_on_trk) { 317f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 318f3eb5384SStefan Weinhuber case 0x3390: 319f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 320f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 321f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 322f3eb5384SStefan Weinhuber break; 323f3eb5384SStefan Weinhuber case 0x3380: 324f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 325f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 326f3eb5384SStefan Weinhuber break; 327f3eb5384SStefan Weinhuber } 328f3eb5384SStefan Weinhuber } 329f3eb5384SStefan Weinhuber data->sector = sector; 330f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 331f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 332f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 333f3eb5384SStefan Weinhuber */ 334f3eb5384SStefan Weinhuber data->count = count; 335f3eb5384SStefan Weinhuber switch (cmd) { 336f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 337f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 338f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 339f3eb5384SStefan Weinhuber break; 340f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 341f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 342f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 343f3eb5384SStefan Weinhuber break; 344f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 345f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 346f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 347f3eb5384SStefan Weinhuber data->count++; 348f3eb5384SStefan Weinhuber break; 349f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 350f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 351f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 352f3eb5384SStefan Weinhuber data->count++; 353f3eb5384SStefan Weinhuber break; 354f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 355f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 356f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 357f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 358f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 359f3eb5384SStefan Weinhuber data->length = reclen; 360f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 361f3eb5384SStefan Weinhuber break; 362f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 363f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 364f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 365f3eb5384SStefan Weinhuber data->length = reclen; 366f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 367f3eb5384SStefan Weinhuber break; 368f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 369f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 370f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 371f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 372f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 373f3eb5384SStefan Weinhuber break; 374f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 375f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 376f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 377f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 378f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 379f3eb5384SStefan Weinhuber data->length = reclen; 380f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 381f3eb5384SStefan Weinhuber break; 382f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 383f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 384f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 385f3eb5384SStefan Weinhuber data->length = reclen; 386f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 387f3eb5384SStefan Weinhuber break; 388f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 389f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 390f3eb5384SStefan Weinhuber break; 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 392f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 393f3eb5384SStefan Weinhuber data->length = tlf; 394f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 395f3eb5384SStefan Weinhuber break; 396f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 397f3eb5384SStefan Weinhuber data->length = reclen; 398f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 399f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 400f3eb5384SStefan Weinhuber break; 401f3eb5384SStefan Weinhuber default: 402f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 403f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 404f3eb5384SStefan Weinhuber BUG(); 405f3eb5384SStefan Weinhuber } 406f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 407f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 408f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 409f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 410f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 411f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 412f3eb5384SStefan Weinhuber } 413f3eb5384SStefan Weinhuber 414f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 415b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 416f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 417f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 418f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4198e09f215SStefan Weinhuber { 4208e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 421f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 422f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 423b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 424b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4258e09f215SStefan Weinhuber int rc = 0; 4268e09f215SStefan Weinhuber 4278e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4288e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 429f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 430f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4318e09f215SStefan Weinhuber 4328e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4338e09f215SStefan Weinhuber ccw->flags = 0; 4348e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4358e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4368e09f215SStefan Weinhuber 4378e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 4388e09f215SStefan Weinhuber /* prefix data */ 439f3eb5384SStefan Weinhuber if (format > 1) { 440f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 441f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 442f3eb5384SStefan Weinhuber BUG(); 443f3eb5384SStefan Weinhuber return -EINVAL; 444f3eb5384SStefan Weinhuber } 445f3eb5384SStefan Weinhuber pfxdata->format = format; 4464abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 4474abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 448f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 4498e09f215SStefan Weinhuber 4508e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4518e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 4528e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 4538e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 4548e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 4558e09f215SStefan Weinhuber } 4568e09f215SStefan Weinhuber 4578e09f215SStefan Weinhuber /* define extend data (mostly)*/ 4588e09f215SStefan Weinhuber switch (cmd) { 4598e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 4608e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 4618e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 4628e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 4638e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 4648e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 4658e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 4668e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 4678e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 468f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 469f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 470f3eb5384SStefan Weinhuber break; 471f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 472f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 473f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 474f3eb5384SStefan Weinhuber dedata->blk_size = 0; 4758e09f215SStefan Weinhuber break; 4768e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 4778e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 4788e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 4798e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 480f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 481f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4828e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 4838e09f215SStefan Weinhuber break; 4848e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 4858e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 486f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 4878e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 4888e09f215SStefan Weinhuber break; 4898e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 4908e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 4918e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 492f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 493f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 494f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 495f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 496f3eb5384SStefan Weinhuber break; 497f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 498f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 499f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 500f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5018e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5028e09f215SStefan Weinhuber break; 5038e09f215SStefan Weinhuber default: 504f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 505f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 506f3eb5384SStefan Weinhuber BUG(); 507f3eb5384SStefan Weinhuber return -EINVAL; 5088e09f215SStefan Weinhuber } 5098e09f215SStefan Weinhuber 510f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5118e09f215SStefan Weinhuber 5128e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5138e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5148e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5158e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 516f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5178e09f215SStefan Weinhuber 518b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 519b44b0ab3SStefan Weinhuber begcyl = trk / heads; 520b44b0ab3SStefan Weinhuber beghead = trk % heads; 521b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 522b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5238e09f215SStefan Weinhuber 5248e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 525f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 526f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5278e09f215SStefan Weinhuber 528b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 529b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5308e09f215SStefan Weinhuber else 531b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5328e09f215SStefan Weinhuber } 5338e09f215SStefan Weinhuber 534f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 535f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 536f3eb5384SStefan Weinhuber 537f3eb5384SStefan Weinhuber if (format == 1) { 538f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 539f3eb5384SStefan Weinhuber basedev, blksize, tlf); 540f3eb5384SStefan Weinhuber } 541f3eb5384SStefan Weinhuber 5428e09f215SStefan Weinhuber return rc; 5438e09f215SStefan Weinhuber } 5448e09f215SStefan Weinhuber 545f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 546f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 547f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 548f3eb5384SStefan Weinhuber { 549f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 550f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 551f3eb5384SStefan Weinhuber } 552f3eb5384SStefan Weinhuber 5534d284cacSHeiko Carstens static void 554b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 555b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5561da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5571da177e4SLinus Torvalds { 5581da177e4SLinus Torvalds struct dasd_eckd_private *private; 5591da177e4SLinus Torvalds int sector; 5601da177e4SLinus Torvalds int dn, d; 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5651da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5661da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5671da177e4SLinus Torvalds 5681da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5691da177e4SLinus Torvalds ccw->flags = 0; 5701da177e4SLinus Torvalds ccw->count = 16; 5711da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5741da177e4SLinus Torvalds sector = 0; 5751da177e4SLinus Torvalds if (rec_on_trk) { 5761da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5771da177e4SLinus Torvalds case 0x3390: 5781da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5791da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 5801da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 5811da177e4SLinus Torvalds break; 5821da177e4SLinus Torvalds case 0x3380: 5831da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 5841da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 5851da177e4SLinus Torvalds break; 5861da177e4SLinus Torvalds } 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds data->sector = sector; 5891da177e4SLinus Torvalds data->count = no_rec; 5901da177e4SLinus Torvalds switch (cmd) { 5911da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5921da177e4SLinus Torvalds data->operation.orientation = 0x3; 5931da177e4SLinus Torvalds data->operation.operation = 0x03; 5941da177e4SLinus Torvalds break; 5951da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5961da177e4SLinus Torvalds data->operation.orientation = 0x3; 5971da177e4SLinus Torvalds data->operation.operation = 0x16; 5981da177e4SLinus Torvalds break; 5991da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6001da177e4SLinus Torvalds data->operation.orientation = 0x1; 6011da177e4SLinus Torvalds data->operation.operation = 0x03; 6021da177e4SLinus Torvalds data->count++; 6031da177e4SLinus Torvalds break; 6041da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6051da177e4SLinus Torvalds data->operation.orientation = 0x3; 6061da177e4SLinus Torvalds data->operation.operation = 0x16; 6071da177e4SLinus Torvalds data->count++; 6081da177e4SLinus Torvalds break; 6091da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6101da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6111da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6121da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6131da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6141da177e4SLinus Torvalds data->length = reclen; 6151da177e4SLinus Torvalds data->operation.operation = 0x01; 6161da177e4SLinus Torvalds break; 6171da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6181da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6191da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6201da177e4SLinus Torvalds data->length = reclen; 6211da177e4SLinus Torvalds data->operation.operation = 0x03; 6221da177e4SLinus Torvalds break; 6231da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6241da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6251da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6261da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6271da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6281da177e4SLinus Torvalds data->length = reclen; 6291da177e4SLinus Torvalds data->operation.operation = 0x06; 6301da177e4SLinus Torvalds break; 6311da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6321da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6331da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6341da177e4SLinus Torvalds data->length = reclen; 6351da177e4SLinus Torvalds data->operation.operation = 0x16; 6361da177e4SLinus Torvalds break; 6371da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6381da177e4SLinus Torvalds data->operation.operation = 0x06; 6391da177e4SLinus Torvalds break; 6401da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6411da177e4SLinus Torvalds data->length = reclen; 6421da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6431da177e4SLinus Torvalds data->operation.operation = 0x0b; 6441da177e4SLinus Torvalds break; 6451da177e4SLinus Torvalds default: 646fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 647fc19f381SStefan Haberland "opcode 0x%x", cmd); 6481da177e4SLinus Torvalds } 649b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 650b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 651b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 652b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 653b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6541da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds /* 6581da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6591da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6601da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6611da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6621da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6631da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6641da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6651da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6661da177e4SLinus Torvalds */ 6671da177e4SLinus Torvalds static inline int 6681da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6691da177e4SLinus Torvalds { 6701da177e4SLinus Torvalds if (recid < 3) 6711da177e4SLinus Torvalds return 1; 6721da177e4SLinus Torvalds if (recid < blk_per_trk) 6731da177e4SLinus Torvalds return 0; 6741da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6751da177e4SLinus Torvalds return 1; 6761da177e4SLinus Torvalds return 0; 6771da177e4SLinus Torvalds } 6781da177e4SLinus Torvalds 6791da177e4SLinus Torvalds /* 6801da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 6811da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 6821da177e4SLinus Torvalds * for the recid. 6831da177e4SLinus Torvalds */ 6841da177e4SLinus Torvalds static inline int 6851da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 6861da177e4SLinus Torvalds { 6871da177e4SLinus Torvalds if (recid < 3) 6881da177e4SLinus Torvalds return sizes_trk0[recid]; 6891da177e4SLinus Torvalds return LABEL_SIZE; 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds 6923d052595SHorst Hummel /* 6933d052595SHorst Hummel * Generate device unique id that specifies the physical device. 6943d052595SHorst Hummel */ 6954abb08c2SStefan Weinhuber static int dasd_eckd_generate_uid(struct dasd_device *device, 6964abb08c2SStefan Weinhuber struct dasd_uid *uid) 6973d052595SHorst Hummel { 6983d052595SHorst Hummel struct dasd_eckd_private *private; 6994abb08c2SStefan Weinhuber int count; 7003d052595SHorst Hummel 7013d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 7023d052595SHorst Hummel if (!private) 7033d052595SHorst Hummel return -ENODEV; 7044abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 7053d052595SHorst Hummel return -ENODEV; 7063d052595SHorst Hummel 7073d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7084abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7093d052595SHorst Hummel sizeof(uid->vendor) - 1); 7103d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7114abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7123d052595SHorst Hummel sizeof(uid->serial) - 1); 7133d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7144abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 715a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7164abb08c2SStefan Weinhuber if (private->sneq) { 7174abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7188e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7194abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7208e09f215SStefan Weinhuber } else { 7218e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7228e09f215SStefan Weinhuber } 7234abb08c2SStefan Weinhuber if (private->vdsneq) { 7244abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7254abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7264abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7274abb08c2SStefan Weinhuber } 7284abb08c2SStefan Weinhuber } 7293d052595SHorst Hummel return 0; 7303d052595SHorst Hummel } 7313d052595SHorst Hummel 732763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 73317283b56SCornelia Huck void *rcd_buffer, 73417283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 73517283b56SCornelia Huck { 73617283b56SCornelia Huck struct dasd_ccw_req *cqr; 73717283b56SCornelia Huck struct ccw1 *ccw; 73817283b56SCornelia Huck 73968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count, 74068b781feSStefan Haberland device); 74117283b56SCornelia Huck 74217283b56SCornelia Huck if (IS_ERR(cqr)) { 743fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 74417283b56SCornelia Huck "Could not allocate RCD request"); 74517283b56SCornelia Huck return cqr; 74617283b56SCornelia Huck } 74717283b56SCornelia Huck 74817283b56SCornelia Huck ccw = cqr->cpaddr; 74917283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 75017283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 75117283b56SCornelia Huck ccw->count = ciw->count; 75217283b56SCornelia Huck 7538e09f215SStefan Weinhuber cqr->startdev = device; 7548e09f215SStefan Weinhuber cqr->memdev = device; 7558e09f215SStefan Weinhuber cqr->block = NULL; 75617283b56SCornelia Huck cqr->expires = 10*HZ; 75717283b56SCornelia Huck cqr->lpm = lpm; 758eb6e199bSStefan Weinhuber cqr->retries = 256; 75917283b56SCornelia Huck cqr->buildclk = get_clock(); 76017283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 76117283b56SCornelia Huck return cqr; 76217283b56SCornelia Huck } 76317283b56SCornelia Huck 76417283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 76517283b56SCornelia Huck void **rcd_buffer, 76617283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 76717283b56SCornelia Huck { 76817283b56SCornelia Huck struct ciw *ciw; 76917283b56SCornelia Huck char *rcd_buf = NULL; 77017283b56SCornelia Huck int ret; 77117283b56SCornelia Huck struct dasd_ccw_req *cqr; 77217283b56SCornelia Huck 77317283b56SCornelia Huck /* 77417283b56SCornelia Huck * scan for RCD command in extended SenseID data 77517283b56SCornelia Huck */ 77617283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 77717283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 77817283b56SCornelia Huck ret = -EOPNOTSUPP; 77917283b56SCornelia Huck goto out_error; 78017283b56SCornelia Huck } 78117283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 78217283b56SCornelia Huck if (!rcd_buf) { 78317283b56SCornelia Huck ret = -ENOMEM; 78417283b56SCornelia Huck goto out_error; 78517283b56SCornelia Huck } 7864abb08c2SStefan Weinhuber 7874abb08c2SStefan Weinhuber /* 7884abb08c2SStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 7894abb08c2SStefan Weinhuber * support for virtual device SNEQ 7904abb08c2SStefan Weinhuber */ 7914abb08c2SStefan Weinhuber rcd_buf[0] = 0xE5; 7924abb08c2SStefan Weinhuber rcd_buf[1] = 0xF1; 7934abb08c2SStefan Weinhuber rcd_buf[2] = 0x4B; 7944abb08c2SStefan Weinhuber rcd_buf[3] = 0xF0; 79517283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 79617283b56SCornelia Huck if (IS_ERR(cqr)) { 79717283b56SCornelia Huck ret = PTR_ERR(cqr); 79817283b56SCornelia Huck goto out_error; 79917283b56SCornelia Huck } 80017283b56SCornelia Huck ret = dasd_sleep_on(cqr); 80117283b56SCornelia Huck /* 80217283b56SCornelia Huck * on success we update the user input parms 80317283b56SCornelia Huck */ 8048e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 80517283b56SCornelia Huck if (ret) 80617283b56SCornelia Huck goto out_error; 80717283b56SCornelia Huck 80817283b56SCornelia Huck *rcd_buffer_size = ciw->count; 80917283b56SCornelia Huck *rcd_buffer = rcd_buf; 81017283b56SCornelia Huck return 0; 81117283b56SCornelia Huck out_error: 81217283b56SCornelia Huck kfree(rcd_buf); 81317283b56SCornelia Huck *rcd_buffer = NULL; 81417283b56SCornelia Huck *rcd_buffer_size = 0; 81517283b56SCornelia Huck return ret; 81617283b56SCornelia Huck } 81717283b56SCornelia Huck 8184abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 8194abb08c2SStefan Weinhuber { 8204abb08c2SStefan Weinhuber 8214abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 8224abb08c2SStefan Weinhuber int i, count; 8234abb08c2SStefan Weinhuber 8244abb08c2SStefan Weinhuber private->ned = NULL; 8254abb08c2SStefan Weinhuber private->sneq = NULL; 8264abb08c2SStefan Weinhuber private->vdsneq = NULL; 8274abb08c2SStefan Weinhuber private->gneq = NULL; 8284abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 8294abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 8304abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8314abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 8324abb08c2SStefan Weinhuber private->sneq = sneq; 8334abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 8344abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 8354abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 8364abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 8374abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 8384abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 8394abb08c2SStefan Weinhuber sneq++; 8404abb08c2SStefan Weinhuber } 8414abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 8424abb08c2SStefan Weinhuber private->ned = NULL; 8434abb08c2SStefan Weinhuber private->sneq = NULL; 8444abb08c2SStefan Weinhuber private->vdsneq = NULL; 8454abb08c2SStefan Weinhuber private->gneq = NULL; 8464abb08c2SStefan Weinhuber return -EINVAL; 8474abb08c2SStefan Weinhuber } 8484abb08c2SStefan Weinhuber return 0; 8494abb08c2SStefan Weinhuber 8504abb08c2SStefan Weinhuber }; 8514abb08c2SStefan Weinhuber 8524abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 8534abb08c2SStefan Weinhuber { 8544abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 8554abb08c2SStefan Weinhuber int i, count, found; 8564abb08c2SStefan Weinhuber 8574abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 8584abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 8594abb08c2SStefan Weinhuber found = 0; 8604abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8614abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 8624abb08c2SStefan Weinhuber found = 1; 8634abb08c2SStefan Weinhuber break; 8644abb08c2SStefan Weinhuber } 8654abb08c2SStefan Weinhuber gneq++; 8664abb08c2SStefan Weinhuber } 8674abb08c2SStefan Weinhuber if (found) 8684abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 8694abb08c2SStefan Weinhuber else 8704abb08c2SStefan Weinhuber return 0; 8714abb08c2SStefan Weinhuber } 8724abb08c2SStefan Weinhuber 8734abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 8741da177e4SLinus Torvalds { 8751da177e4SLinus Torvalds void *conf_data; 8761da177e4SLinus Torvalds int conf_len, conf_data_saved; 8771da177e4SLinus Torvalds int rc; 8781da177e4SLinus Torvalds __u8 lpm; 8791da177e4SLinus Torvalds struct dasd_eckd_private *private; 8801da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 8811da177e4SLinus Torvalds 8821da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8831da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 8841da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 8851da177e4SLinus Torvalds lpm = 0x80; 8861da177e4SLinus Torvalds conf_data_saved = 0; 8871da177e4SLinus Torvalds /* get configuration data per operational path */ 8881da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 8891da177e4SLinus Torvalds if (lpm & path_data->opm){ 89017283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 8911da177e4SLinus Torvalds &conf_len, lpm); 8921da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 893b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 8941da177e4SLinus Torvalds "Read configuration data returned " 895b8ed5dd5SStefan Haberland "error %d", rc); 8961da177e4SLinus Torvalds return rc; 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds if (conf_data == NULL) { 899b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 900b8ed5dd5SStefan Haberland "No configuration data " 901b8ed5dd5SStefan Haberland "retrieved"); 902d133a960SGabriel Craciunescu continue; /* no error */ 9031da177e4SLinus Torvalds } 9041da177e4SLinus Torvalds /* save first valid configuration data */ 9051da177e4SLinus Torvalds if (!conf_data_saved) { 9064abb08c2SStefan Weinhuber kfree(private->conf_data); 9074abb08c2SStefan Weinhuber private->conf_data = conf_data; 9084abb08c2SStefan Weinhuber private->conf_len = conf_len; 9094abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 9104abb08c2SStefan Weinhuber private->conf_data = NULL; 9114abb08c2SStefan Weinhuber private->conf_len = 0; 9124abb08c2SStefan Weinhuber kfree(conf_data); 9134abb08c2SStefan Weinhuber continue; 9144abb08c2SStefan Weinhuber } 9151da177e4SLinus Torvalds conf_data_saved++; 9161da177e4SLinus Torvalds } 9174abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 9181da177e4SLinus Torvalds case 0x02: 9191da177e4SLinus Torvalds path_data->npm |= lpm; 9201da177e4SLinus Torvalds break; 9211da177e4SLinus Torvalds case 0x03: 9221da177e4SLinus Torvalds path_data->ppm |= lpm; 9231da177e4SLinus Torvalds break; 9241da177e4SLinus Torvalds } 9254abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 9261da177e4SLinus Torvalds kfree(conf_data); 9271da177e4SLinus Torvalds } 9281da177e4SLinus Torvalds } 9291da177e4SLinus Torvalds return 0; 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds 9328e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 9338e09f215SStefan Weinhuber { 9348e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 9358e09f215SStefan Weinhuber struct dasd_rssd_features *features; 9368e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 9378e09f215SStefan Weinhuber struct ccw1 *ccw; 9388e09f215SStefan Weinhuber int rc; 9398e09f215SStefan Weinhuber struct dasd_eckd_private *private; 9408e09f215SStefan Weinhuber 9418e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 94268d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 94368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 9448e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 9458e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 9468e09f215SStefan Weinhuber device); 9478e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 948b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 949b8ed5dd5SStefan Haberland "allocate initialization request"); 9508e09f215SStefan Weinhuber return PTR_ERR(cqr); 9518e09f215SStefan Weinhuber } 9528e09f215SStefan Weinhuber cqr->startdev = device; 9538e09f215SStefan Weinhuber cqr->memdev = device; 9548e09f215SStefan Weinhuber cqr->block = NULL; 955eb6e199bSStefan Weinhuber cqr->retries = 256; 9568e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 9578e09f215SStefan Weinhuber 9588e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 9598e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 9608e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 9618e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 9628e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 9638e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 9648e09f215SStefan Weinhuber 9658e09f215SStefan Weinhuber ccw = cqr->cpaddr; 9668e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 9678e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 9688e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 9698e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 9708e09f215SStefan Weinhuber 9718e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 9728e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 9738e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 9748e09f215SStefan Weinhuber 9758e09f215SStefan Weinhuber ccw++; 9768e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 9778e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 9788e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 9798e09f215SStefan Weinhuber 9808e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 9818e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 9828e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 9838e09f215SStefan Weinhuber if (rc == 0) { 9848e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 9858e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 9868e09f215SStefan Weinhuber memcpy(&private->features, features, 9878e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 98868d1e5f0SStefan Weinhuber } else 98968d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 99068d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 9918e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 9928e09f215SStefan Weinhuber return rc; 9938e09f215SStefan Weinhuber } 9948e09f215SStefan Weinhuber 9958e09f215SStefan Weinhuber 9963d052595SHorst Hummel /* 99740545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 99840545573SHorst Hummel */ 999f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1000f3eb5384SStefan Weinhuber int enable_pav) 100140545573SHorst Hummel { 100240545573SHorst Hummel struct dasd_ccw_req *cqr; 100340545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 100440545573SHorst Hummel struct ccw1 *ccw; 100540545573SHorst Hummel 100668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 100740545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 100840545573SHorst Hummel device); 100940545573SHorst Hummel 101040545573SHorst Hummel if (IS_ERR(cqr)) { 1011fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 101240545573SHorst Hummel "Could not allocate PSF-SSC request"); 101340545573SHorst Hummel return cqr; 101440545573SHorst Hummel } 101540545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 101640545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1017626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1018f3eb5384SStefan Weinhuber if (enable_pav) { 1019626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 10208e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1021f3eb5384SStefan Weinhuber } 102240545573SHorst Hummel ccw = cqr->cpaddr; 102340545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 102440545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 102540545573SHorst Hummel ccw->count = 66; 102640545573SHorst Hummel 10278e09f215SStefan Weinhuber cqr->startdev = device; 10288e09f215SStefan Weinhuber cqr->memdev = device; 10298e09f215SStefan Weinhuber cqr->block = NULL; 1030eb6e199bSStefan Weinhuber cqr->retries = 256; 103140545573SHorst Hummel cqr->expires = 10*HZ; 103240545573SHorst Hummel cqr->buildclk = get_clock(); 103340545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 103440545573SHorst Hummel return cqr; 103540545573SHorst Hummel } 103640545573SHorst Hummel 103740545573SHorst Hummel /* 103840545573SHorst Hummel * Perform Subsystem Function. 103940545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 104040545573SHorst Hummel * call might change behaviour of DASD devices. 104140545573SHorst Hummel */ 104240545573SHorst Hummel static int 1043f3eb5384SStefan Weinhuber dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 104440545573SHorst Hummel { 104540545573SHorst Hummel struct dasd_ccw_req *cqr; 104640545573SHorst Hummel int rc; 104740545573SHorst Hummel 1048f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 104940545573SHorst Hummel if (IS_ERR(cqr)) 105040545573SHorst Hummel return PTR_ERR(cqr); 105140545573SHorst Hummel 105240545573SHorst Hummel rc = dasd_sleep_on(cqr); 105340545573SHorst Hummel if (!rc) 105440545573SHorst Hummel /* trigger CIO to reprobe devices */ 105540545573SHorst Hummel css_schedule_reprobe(); 10568e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 105740545573SHorst Hummel return rc; 105840545573SHorst Hummel } 105940545573SHorst Hummel 106040545573SHorst Hummel /* 106140545573SHorst Hummel * Valide storage server of current device. 106240545573SHorst Hummel */ 1063f4ac1d02SStefan Weinhuber static void dasd_eckd_validate_server(struct dasd_device *device) 106440545573SHorst Hummel { 106540545573SHorst Hummel int rc; 10668e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1067f3eb5384SStefan Weinhuber int enable_pav; 106840545573SHorst Hummel 106940545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1070f3eb5384SStefan Weinhuber enable_pav = 0; 1071f3eb5384SStefan Weinhuber else 1072f3eb5384SStefan Weinhuber enable_pav = 1; 1073f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 1074eb6e199bSStefan Weinhuber 107540545573SHorst Hummel /* may be requested feature is not available on server, 107640545573SHorst Hummel * therefore just report error and go ahead */ 10778e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1078b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1079b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 108040545573SHorst Hummel } 108140545573SHorst Hummel 108240545573SHorst Hummel /* 10833d052595SHorst Hummel * Check device characteristics. 10843d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 10853d052595SHorst Hummel */ 10861da177e4SLinus Torvalds static int 10871da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 10881da177e4SLinus Torvalds { 10891da177e4SLinus Torvalds struct dasd_eckd_private *private; 10908e09f215SStefan Weinhuber struct dasd_block *block; 10918e09f215SStefan Weinhuber int is_known, rc; 109233b62a30SStefan Weinhuber int readonly; 10931da177e4SLinus Torvalds 1094454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1095454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1096454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1097454e1fa1SPeter Oberparleiter return -EIO; 1098454e1fa1SPeter Oberparleiter } 1099454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1100454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1101454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1102454e1fa1SPeter Oberparleiter } 11031da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 110492636b15SSebastian Ott if (!private) { 110592636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 110692636b15SSebastian Ott if (!private) { 1107fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1108fc19f381SStefan Haberland "Allocating memory for private DASD data " 1109fc19f381SStefan Haberland "failed\n"); 11101da177e4SLinus Torvalds return -ENOMEM; 11111da177e4SLinus Torvalds } 11121da177e4SLinus Torvalds device->private = (void *) private; 111392636b15SSebastian Ott } else { 111492636b15SSebastian Ott memset(private, 0, sizeof(*private)); 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 11171da177e4SLinus Torvalds private->init_cqr_status = -1; 11181da177e4SLinus Torvalds /* Set default cache operations. */ 11191da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 11201da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 11211da177e4SLinus Torvalds 112240545573SHorst Hummel /* Read Configuration Data */ 112340545573SHorst Hummel rc = dasd_eckd_read_conf(device); 112440545573SHorst Hummel if (rc) 11258e09f215SStefan Weinhuber goto out_err1; 112640545573SHorst Hummel 112740545573SHorst Hummel /* Generate device unique id and register in devmap */ 11288e09f215SStefan Weinhuber rc = dasd_eckd_generate_uid(device, &private->uid); 112940545573SHorst Hummel if (rc) 11308e09f215SStefan Weinhuber goto out_err1; 11318e09f215SStefan Weinhuber dasd_set_uid(device->cdev, &private->uid); 11328e09f215SStefan Weinhuber 11338e09f215SStefan Weinhuber if (private->uid.type == UA_BASE_DEVICE) { 11348e09f215SStefan Weinhuber block = dasd_alloc_block(); 11358e09f215SStefan Weinhuber if (IS_ERR(block)) { 1136b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1137b8ed5dd5SStefan Haberland "could not allocate dasd " 1138b8ed5dd5SStefan Haberland "block structure"); 11398e09f215SStefan Weinhuber rc = PTR_ERR(block); 11408e09f215SStefan Weinhuber goto out_err1; 11418e09f215SStefan Weinhuber } 11428e09f215SStefan Weinhuber device->block = block; 11438e09f215SStefan Weinhuber block->base = device; 11448e09f215SStefan Weinhuber } 11458e09f215SStefan Weinhuber 11468e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 11478e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 11488e09f215SStefan Weinhuber if (is_known < 0) { 11498e09f215SStefan Weinhuber rc = is_known; 11508e09f215SStefan Weinhuber goto out_err2; 11518e09f215SStefan Weinhuber } 1152f4ac1d02SStefan Weinhuber /* 1153f4ac1d02SStefan Weinhuber * dasd_eckd_vaildate_server is done on the first device that 1154f4ac1d02SStefan Weinhuber * is found for an LCU. All later other devices have to wait 1155f4ac1d02SStefan Weinhuber * for it, so they will read the correct feature codes. 1156f4ac1d02SStefan Weinhuber */ 11578e09f215SStefan Weinhuber if (!is_known) { 1158f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1159f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 1160f4ac1d02SStefan Weinhuber } else 1161f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 1162f4ac1d02SStefan Weinhuber 1163f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1164f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 116540545573SHorst Hummel if (rc) 11668e09f215SStefan Weinhuber goto out_err3; 11678e09f215SStefan Weinhuber 11688e09f215SStefan Weinhuber /* Read Feature Codes */ 116968d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 117040545573SHorst Hummel 11711da177e4SLinus Torvalds /* Read Device Characteristics */ 117268b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 117368b781feSStefan Haberland &private->rdc_data, 64); 11748e09f215SStefan Weinhuber if (rc) { 1175b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1176b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 11778e09f215SStefan Weinhuber goto out_err3; 11788e09f215SStefan Weinhuber } 1179b44b0ab3SStefan Weinhuber /* find the vaild cylinder size */ 1180b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1181b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1182b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1183b44b0ab3SStefan Weinhuber else 1184b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1185b44b0ab3SStefan Weinhuber 118633b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 118733b62a30SStefan Weinhuber if (readonly) 118833b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 118933b62a30SStefan Weinhuber 1190fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 119133b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 11921da177e4SLinus Torvalds private->rdc_data.dev_type, 11931da177e4SLinus Torvalds private->rdc_data.dev_model, 11941da177e4SLinus Torvalds private->rdc_data.cu_type, 11951da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1196b44b0ab3SStefan Weinhuber private->real_cyl, 11971da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 119833b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 119933b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 12008e09f215SStefan Weinhuber return 0; 12018e09f215SStefan Weinhuber 12028e09f215SStefan Weinhuber out_err3: 12038e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 12048e09f215SStefan Weinhuber out_err2: 12058e09f215SStefan Weinhuber dasd_free_block(device->block); 12068e09f215SStefan Weinhuber device->block = NULL; 12078e09f215SStefan Weinhuber out_err1: 12084abb08c2SStefan Weinhuber kfree(private->conf_data); 12098e09f215SStefan Weinhuber kfree(device->private); 12108e09f215SStefan Weinhuber device->private = NULL; 12113d052595SHorst Hummel return rc; 12121da177e4SLinus Torvalds } 12131da177e4SLinus Torvalds 12148e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 12158e09f215SStefan Weinhuber { 12164abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 12174abb08c2SStefan Weinhuber 12184abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 12198e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 12204abb08c2SStefan Weinhuber private->ned = NULL; 12214abb08c2SStefan Weinhuber private->sneq = NULL; 12224abb08c2SStefan Weinhuber private->vdsneq = NULL; 12234abb08c2SStefan Weinhuber private->gneq = NULL; 12244abb08c2SStefan Weinhuber private->conf_len = 0; 12254abb08c2SStefan Weinhuber kfree(private->conf_data); 12264abb08c2SStefan Weinhuber private->conf_data = NULL; 12278e09f215SStefan Weinhuber } 12288e09f215SStefan Weinhuber 12291da177e4SLinus Torvalds static struct dasd_ccw_req * 12301da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 12311da177e4SLinus Torvalds { 12321da177e4SLinus Torvalds struct dasd_eckd_private *private; 12331da177e4SLinus Torvalds struct eckd_count *count_data; 12341da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 12351da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 12361da177e4SLinus Torvalds struct ccw1 *ccw; 12371da177e4SLinus Torvalds int cplength, datasize; 12381da177e4SLinus Torvalds int i; 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12411da177e4SLinus Torvalds 12421da177e4SLinus Torvalds cplength = 8; 12431da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 124468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 12451da177e4SLinus Torvalds if (IS_ERR(cqr)) 12461da177e4SLinus Torvalds return cqr; 12471da177e4SLinus Torvalds ccw = cqr->cpaddr; 12481da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 12491da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 12501da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 12511da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 12521da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 12531da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12541da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 12551da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 12561da177e4SLinus Torvalds 12571da177e4SLinus Torvalds count_data = private->count_area; 12581da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12591da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12601da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 12611da177e4SLinus Torvalds ccw->flags = 0; 12621da177e4SLinus Torvalds ccw->count = 8; 12631da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 12641da177e4SLinus Torvalds ccw++; 12651da177e4SLinus Torvalds count_data++; 12661da177e4SLinus Torvalds } 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 12691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12701da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 12711da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 12721da177e4SLinus Torvalds /* Read count ccw. */ 12731da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12741da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 12751da177e4SLinus Torvalds ccw->flags = 0; 12761da177e4SLinus Torvalds ccw->count = 8; 12771da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 12781da177e4SLinus Torvalds 12798e09f215SStefan Weinhuber cqr->block = NULL; 12808e09f215SStefan Weinhuber cqr->startdev = device; 12818e09f215SStefan Weinhuber cqr->memdev = device; 1282eb6e199bSStefan Weinhuber cqr->retries = 255; 12831da177e4SLinus Torvalds cqr->buildclk = get_clock(); 12841da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 12851da177e4SLinus Torvalds return cqr; 12861da177e4SLinus Torvalds } 12871da177e4SLinus Torvalds 1288eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1289eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1290eb6e199bSStefan Weinhuber { 1291eb6e199bSStefan Weinhuber char *sense; 1292eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1293eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1294eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1295eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1296eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1297eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1298eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1299eb6e199bSStefan Weinhuber else 1300eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1301eb6e199bSStefan Weinhuber } else 1302eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1303eb6e199bSStefan Weinhuber } 1304eb6e199bSStefan Weinhuber 13051da177e4SLinus Torvalds /* 13061da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 13071da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 13081da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 13091da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 13101da177e4SLinus Torvalds * for deletion in the meantime). 13111da177e4SLinus Torvalds */ 1312eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1313eb6e199bSStefan Weinhuber void *data) 13141da177e4SLinus Torvalds { 13151da177e4SLinus Torvalds struct dasd_eckd_private *private; 13161da177e4SLinus Torvalds struct dasd_device *device; 13171da177e4SLinus Torvalds 13188e09f215SStefan Weinhuber device = init_cqr->startdev; 13191da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1320eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 13211da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 13221da177e4SLinus Torvalds dasd_kick_device(device); 13231da177e4SLinus Torvalds } 13241da177e4SLinus Torvalds 1325eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 13261da177e4SLinus Torvalds { 13271da177e4SLinus Torvalds struct dasd_eckd_private *private; 13281da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 13291da177e4SLinus Torvalds 13308e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 13318e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 13321da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 13331da177e4SLinus Torvalds return PTR_ERR(init_cqr); 13341da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 13351da177e4SLinus Torvalds init_cqr->callback_data = NULL; 13361da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1337eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1338eb6e199bSStefan Weinhuber * devices as special case 1339eb6e199bSStefan Weinhuber */ 1340eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1341eb6e199bSStefan Weinhuber init_cqr->retries = 0; 13421da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 13431da177e4SLinus Torvalds return -EAGAIN; 13441da177e4SLinus Torvalds } 13451da177e4SLinus Torvalds 1346eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 13471da177e4SLinus Torvalds { 13488e09f215SStefan Weinhuber struct dasd_device *device; 13491da177e4SLinus Torvalds struct dasd_eckd_private *private; 13501da177e4SLinus Torvalds struct eckd_count *count_area; 13511da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 13521da177e4SLinus Torvalds int status, i; 1353eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 13541da177e4SLinus Torvalds 13558e09f215SStefan Weinhuber device = block->base; 13561da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 13571da177e4SLinus Torvalds status = private->init_cqr_status; 13581da177e4SLinus Torvalds private->init_cqr_status = -1; 1359eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1360eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1361eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1362eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1363eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1364eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1365eb6e199bSStefan Weinhuber } 1366eb6e199bSStefan Weinhuber 1367eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1368eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 13691da177e4SLinus Torvalds return -EMEDIUMTYPE; 1370eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1371eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1372eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1373eb6e199bSStefan Weinhuber "of an I/O error\n"); 1374eb6e199bSStefan Weinhuber return -EIO; 13751da177e4SLinus Torvalds } 13761da177e4SLinus Torvalds 13771da177e4SLinus Torvalds private->uses_cdl = 1; 13781da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 13791da177e4SLinus Torvalds count_area = NULL; 13801da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 13811da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 13821da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 13831da177e4SLinus Torvalds private->uses_cdl = 0; 13841da177e4SLinus Torvalds break; 13851da177e4SLinus Torvalds } 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds if (i == 3) 13881da177e4SLinus Torvalds count_area = &private->count_area[4]; 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds if (private->uses_cdl == 0) { 13911da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 13921da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 13931da177e4SLinus Torvalds (private->count_area[i].dl != 13941da177e4SLinus Torvalds private->count_area[0].dl)) 13951da177e4SLinus Torvalds break; 13961da177e4SLinus Torvalds } 13971da177e4SLinus Torvalds if (i == 5) 13981da177e4SLinus Torvalds count_area = &private->count_area[0]; 13991da177e4SLinus Torvalds } else { 14001da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1401fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1402fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 14031da177e4SLinus Torvalds } 14041da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 14051da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 14061da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 14078e09f215SStefan Weinhuber block->bp_block = count_area->dl; 14081da177e4SLinus Torvalds } 14098e09f215SStefan Weinhuber if (block->bp_block == 0) { 1410fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1411fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 14121da177e4SLinus Torvalds return -EMEDIUMTYPE; 14131da177e4SLinus Torvalds } 14148e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 14158e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 14168e09f215SStefan Weinhuber block->s2b_shift++; 14171da177e4SLinus Torvalds 14188e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1419b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 14201da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 14211da177e4SLinus Torvalds blk_per_trk); 14221da177e4SLinus Torvalds 1423fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1424fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1425fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1426b44b0ab3SStefan Weinhuber ((private->real_cyl * 14271da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 14288e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 14298e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 14301da177e4SLinus Torvalds private->uses_cdl ? 14311da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds return 0; 14341da177e4SLinus Torvalds } 14351da177e4SLinus Torvalds 14368e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 14371da177e4SLinus Torvalds { 14381da177e4SLinus Torvalds struct dasd_eckd_private *private; 14391da177e4SLinus Torvalds 14408e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 14411da177e4SLinus Torvalds if (private->init_cqr_status < 0) 14428e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 14431da177e4SLinus Torvalds else 14448e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 14451da177e4SLinus Torvalds } 14461da177e4SLinus Torvalds 14478e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 14488e09f215SStefan Weinhuber { 14498e09f215SStefan Weinhuber return dasd_alias_add_device(device); 14508e09f215SStefan Weinhuber }; 14518e09f215SStefan Weinhuber 14528e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 14538e09f215SStefan Weinhuber { 14548e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 14558e09f215SStefan Weinhuber }; 14568e09f215SStefan Weinhuber 14571da177e4SLinus Torvalds static int 14588e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 14591da177e4SLinus Torvalds { 14601da177e4SLinus Torvalds struct dasd_eckd_private *private; 14611da177e4SLinus Torvalds 14628e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 14638e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 14641da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 14658e09f215SStefan Weinhuber 0, block->bp_block); 14661da177e4SLinus Torvalds } 14671da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 14681da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 14691da177e4SLinus Torvalds return 0; 14701da177e4SLinus Torvalds } 14711da177e4SLinus Torvalds 14721da177e4SLinus Torvalds static struct dasd_ccw_req * 14731da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 14741da177e4SLinus Torvalds struct format_data_t * fdata) 14751da177e4SLinus Torvalds { 14761da177e4SLinus Torvalds struct dasd_eckd_private *private; 14771da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 14781da177e4SLinus Torvalds struct eckd_count *ect; 14791da177e4SLinus Torvalds struct ccw1 *ccw; 14801da177e4SLinus Torvalds void *data; 1481b44b0ab3SStefan Weinhuber int rpt; 1482b44b0ab3SStefan Weinhuber struct ch_t address; 14831da177e4SLinus Torvalds int cplength, datasize; 14841da177e4SLinus Torvalds int i; 1485f9a28f7bSJean-Baptiste Joret int intensity = 0; 1486f9a28f7bSJean-Baptiste Joret int r0_perm; 14871da177e4SLinus Torvalds 14881da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 14891da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1490b44b0ab3SStefan Weinhuber set_ch_t(&address, 1491b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1492b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 14931da177e4SLinus Torvalds 14941da177e4SLinus Torvalds /* Sanity checks. */ 14951da177e4SLinus Torvalds if (fdata->start_unit >= 1496b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1497fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 1498fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 14991da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15001da177e4SLinus Torvalds } 15011da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1502fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 1503fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 15041da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15051da177e4SLinus Torvalds } 15061da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 1507fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1508fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 15091da177e4SLinus Torvalds fdata->blksize); 15101da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15111da177e4SLinus Torvalds } 15121da177e4SLinus Torvalds 15131da177e4SLinus Torvalds /* 15141da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 15151da177e4SLinus Torvalds * Bit 0: write record zero 15161da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 15171da177e4SLinus Torvalds * Bit 2: invalidate tracks 15181da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1519f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 15201da177e4SLinus Torvalds * Only some bit combinations do make sense. 15211da177e4SLinus Torvalds */ 1522f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1523f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1524f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1525f9a28f7bSJean-Baptiste Joret } else { 1526f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1527f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1528f9a28f7bSJean-Baptiste Joret } 1529f9a28f7bSJean-Baptiste Joret switch (intensity) { 15301da177e4SLinus Torvalds case 0x00: /* Normal format */ 15311da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 15321da177e4SLinus Torvalds cplength = 2 + rpt; 15331da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15341da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15351da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 15361da177e4SLinus Torvalds break; 15371da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 15381da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 15391da177e4SLinus Torvalds cplength = 3 + rpt; 15401da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15411da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15421da177e4SLinus Torvalds sizeof(struct eckd_count) + 15431da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 15441da177e4SLinus Torvalds break; 15451da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 15461da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 15471da177e4SLinus Torvalds cplength = 3; 15481da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15491da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15501da177e4SLinus Torvalds sizeof(struct eckd_count); 15511da177e4SLinus Torvalds break; 15521da177e4SLinus Torvalds default: 1553fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 1554fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 15551da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15561da177e4SLinus Torvalds } 15571da177e4SLinus Torvalds /* Allocate the format ccw request. */ 155868b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 15591da177e4SLinus Torvalds if (IS_ERR(fcp)) 15601da177e4SLinus Torvalds return fcp; 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds data = fcp->data; 15631da177e4SLinus Torvalds ccw = fcp->cpaddr; 15641da177e4SLinus Torvalds 1565f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 15661da177e4SLinus Torvalds case 0x00: /* Normal format. */ 15671da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 15681da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 15691da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1570f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1571f9a28f7bSJean-Baptiste Joret if (r0_perm) 1572f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 15731da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 15741da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15751da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 15761da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 15771da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 15781da177e4SLinus Torvalds fdata->blksize); 15791da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 15801da177e4SLinus Torvalds break; 15811da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 15821da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 15831da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 15841da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 15851da177e4SLinus Torvalds device); 15861da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 15871da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15881da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 15891da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 15901da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 15918e09f215SStefan Weinhuber device->block->bp_block); 15921da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 15931da177e4SLinus Torvalds break; 15941da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 15951da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 15961da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 15971da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 15981da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 15991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16001da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16011da177e4SLinus Torvalds fdata->start_unit, 0, 1, 16021da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 16031da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16041da177e4SLinus Torvalds break; 16051da177e4SLinus Torvalds } 1606f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 16071da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16081da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1609b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1610b44b0ab3SStefan Weinhuber ect->head = address.head; 16111da177e4SLinus Torvalds ect->record = 0; 16121da177e4SLinus Torvalds ect->kl = 0; 16131da177e4SLinus Torvalds ect->dl = 8; 16141da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16151da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 16161da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16171da177e4SLinus Torvalds ccw->count = 8; 16181da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16191da177e4SLinus Torvalds ccw++; 16201da177e4SLinus Torvalds } 1621f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 16221da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16231da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1624b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1625b44b0ab3SStefan Weinhuber ect->head = address.head; 16261da177e4SLinus Torvalds ect->record = 1; 16271da177e4SLinus Torvalds ect->kl = 0; 16281da177e4SLinus Torvalds ect->dl = 0; 16291da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16301da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 16311da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16321da177e4SLinus Torvalds ccw->count = 8; 16331da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16341da177e4SLinus Torvalds } else { /* write remaining records */ 16351da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 16361da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16371da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1638b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1639b44b0ab3SStefan Weinhuber ect->head = address.head; 16401da177e4SLinus Torvalds ect->record = i + 1; 16411da177e4SLinus Torvalds ect->kl = 0; 16421da177e4SLinus Torvalds ect->dl = fdata->blksize; 16431da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1644f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 16451da177e4SLinus Torvalds fdata->start_unit == 0) { 16461da177e4SLinus Torvalds if (i < 3) { 16471da177e4SLinus Torvalds ect->kl = 4; 16481da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 16491da177e4SLinus Torvalds } 16501da177e4SLinus Torvalds } 1651f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 16521da177e4SLinus Torvalds fdata->start_unit == 1) { 16531da177e4SLinus Torvalds ect->kl = 44; 16541da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 16551da177e4SLinus Torvalds } 16561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16571da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 16581da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16591da177e4SLinus Torvalds ccw->count = 8; 16601da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16611da177e4SLinus Torvalds ccw++; 16621da177e4SLinus Torvalds } 16631da177e4SLinus Torvalds } 16648e09f215SStefan Weinhuber fcp->startdev = device; 16658e09f215SStefan Weinhuber fcp->memdev = device; 1666eb6e199bSStefan Weinhuber fcp->retries = 256; 16671da177e4SLinus Torvalds fcp->buildclk = get_clock(); 16681da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 16691da177e4SLinus Torvalds return fcp; 16701da177e4SLinus Torvalds } 16711da177e4SLinus Torvalds 16728e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 16731da177e4SLinus Torvalds { 16748e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 16758e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 16768e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 16778e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 16781da177e4SLinus Torvalds } 16798e09f215SStefan Weinhuber }; 16801da177e4SLinus Torvalds 16811da177e4SLinus Torvalds static dasd_erp_fn_t 16821da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 16831da177e4SLinus Torvalds { 16848e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 16851da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 16861da177e4SLinus Torvalds 16871da177e4SLinus Torvalds switch (cdev->id.cu_type) { 16881da177e4SLinus Torvalds case 0x3990: 16891da177e4SLinus Torvalds case 0x2105: 16901da177e4SLinus Torvalds case 0x2107: 16911da177e4SLinus Torvalds case 0x1750: 16921da177e4SLinus Torvalds return dasd_3990_erp_action; 16931da177e4SLinus Torvalds case 0x9343: 16941da177e4SLinus Torvalds case 0x3880: 16951da177e4SLinus Torvalds default: 16961da177e4SLinus Torvalds return dasd_default_erp_action; 16971da177e4SLinus Torvalds } 16981da177e4SLinus Torvalds } 16991da177e4SLinus Torvalds 17001da177e4SLinus Torvalds static dasd_erp_fn_t 17011da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 17021da177e4SLinus Torvalds { 17031da177e4SLinus Torvalds return dasd_default_erp_postaction; 17041da177e4SLinus Torvalds } 17051da177e4SLinus Torvalds 17068e09f215SStefan Weinhuber 17078e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 17088e09f215SStefan Weinhuber struct irb *irb) 17098e09f215SStefan Weinhuber { 17108e09f215SStefan Weinhuber char mask; 1711f3eb5384SStefan Weinhuber char *sense = NULL; 17128e09f215SStefan Weinhuber 17138e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 17148e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1715f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 17168e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 17178e09f215SStefan Weinhuber return; 17188e09f215SStefan Weinhuber } 17198e09f215SStefan Weinhuber 17208e09f215SStefan Weinhuber /* summary unit check */ 1721f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 172223d805b6SPeter Oberparleiter (irb->ecw[7] == 0x0D)) { 17238e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 17248e09f215SStefan Weinhuber return; 17258e09f215SStefan Weinhuber } 17268e09f215SStefan Weinhuber 1727f3eb5384SStefan Weinhuber sense = dasd_get_sense(irb); 1728f60c768cSStefan Haberland /* service information message SIM */ 1729f3eb5384SStefan Weinhuber if (sense && !(sense[27] & DASD_SENSE_BIT_0) && 1730f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1731f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 17329d853cafSStefan Haberland dasd_schedule_device_bh(device); 1733f60c768cSStefan Haberland return; 1734f60c768cSStefan Haberland } 1735f60c768cSStefan Haberland 1736f3eb5384SStefan Weinhuber if ((scsw_cc(&irb->scsw) == 1) && 1737f3eb5384SStefan Weinhuber (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) && 1738f3eb5384SStefan Weinhuber (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) && 1739f3eb5384SStefan Weinhuber (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) { 1740ada3df91SStefan Haberland /* fake irb do nothing, they are handled elsewhere */ 17418e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 1742ada3df91SStefan Haberland return; 1743ada3df91SStefan Haberland } 17448e09f215SStefan Weinhuber 1745f3eb5384SStefan Weinhuber if (!sense) { 1746ada3df91SStefan Haberland /* just report other unsolicited interrupts */ 1747fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "%s", 1748ada3df91SStefan Haberland "unsolicited interrupt received"); 1749ada3df91SStefan Haberland } else { 1750fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "%s", 1751ada3df91SStefan Haberland "unsolicited interrupt received " 1752ada3df91SStefan Haberland "(sense available)"); 1753aeec92caSStefan Haberland device->discipline->dump_sense_dbf(device, irb, "unsolicited"); 1754ada3df91SStefan Haberland } 1755ada3df91SStefan Haberland 1756ada3df91SStefan Haberland dasd_schedule_device_bh(device); 17578e09f215SStefan Weinhuber return; 17588e09f215SStefan Weinhuber }; 17598e09f215SStefan Weinhuber 1760f3eb5384SStefan Weinhuber 1761f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 1762f3eb5384SStefan Weinhuber struct dasd_device *startdev, 17638e09f215SStefan Weinhuber struct dasd_block *block, 1764f3eb5384SStefan Weinhuber struct request *req, 1765f3eb5384SStefan Weinhuber sector_t first_rec, 1766f3eb5384SStefan Weinhuber sector_t last_rec, 1767f3eb5384SStefan Weinhuber sector_t first_trk, 1768f3eb5384SStefan Weinhuber sector_t last_trk, 1769f3eb5384SStefan Weinhuber unsigned int first_offs, 1770f3eb5384SStefan Weinhuber unsigned int last_offs, 1771f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1772f3eb5384SStefan Weinhuber unsigned int blksize) 17731da177e4SLinus Torvalds { 17741da177e4SLinus Torvalds struct dasd_eckd_private *private; 17751da177e4SLinus Torvalds unsigned long *idaws; 17761da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 17771da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17781da177e4SLinus Torvalds struct ccw1 *ccw; 17795705f702SNeilBrown struct req_iterator iter; 17801da177e4SLinus Torvalds struct bio_vec *bv; 17811da177e4SLinus Torvalds char *dst; 1782f3eb5384SStefan Weinhuber unsigned int off; 17831da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 1784f3eb5384SStefan Weinhuber sector_t recid; 17851da177e4SLinus Torvalds unsigned char cmd, rcmd; 17868e09f215SStefan Weinhuber int use_prefix; 17878e09f215SStefan Weinhuber struct dasd_device *basedev; 17881da177e4SLinus Torvalds 17898e09f215SStefan Weinhuber basedev = block->base; 17908e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 17911da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 17921da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 17931da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 17941da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 17951da177e4SLinus Torvalds else 17961da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 1797f3eb5384SStefan Weinhuber 17981da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 17991da177e4SLinus Torvalds count = 0; 18001da177e4SLinus Torvalds cidaw = 0; 18015705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 18021da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 18031da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 18041da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18058e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1806347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 18076c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 18088e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 18091da177e4SLinus Torvalds #endif 18101da177e4SLinus Torvalds } 18111da177e4SLinus Torvalds /* Paranoia. */ 18121da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 18131da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18148e09f215SStefan Weinhuber 18158e09f215SStefan Weinhuber /* use the prefix command if available */ 18168e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 18178e09f215SStefan Weinhuber if (use_prefix) { 18188e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 18198e09f215SStefan Weinhuber cplength = 2 + count; 18208e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 18218e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 18228e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 18238e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 18248e09f215SStefan Weinhuber } else { 18251da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 18261da177e4SLinus Torvalds cplength = 2 + count; 18271da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 18288e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 18298e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 18301da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 18318e09f215SStefan Weinhuber } 18321da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 18331da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 18341da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 18351da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 18361da177e4SLinus Torvalds cplength += count; 18371da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 18381da177e4SLinus Torvalds } 18391da177e4SLinus Torvalds /* Allocate the ccw request. */ 184068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 184168b781feSStefan Haberland startdev); 18421da177e4SLinus Torvalds if (IS_ERR(cqr)) 18431da177e4SLinus Torvalds return cqr; 18441da177e4SLinus Torvalds ccw = cqr->cpaddr; 18458e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 18468e09f215SStefan Weinhuber if (use_prefix) { 18478e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 18488e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 18498e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 18508e09f215SStefan Weinhuber * Try again later. 18518e09f215SStefan Weinhuber */ 18528e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1853d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1854d54853efSMartin Schwidefsky } 18558e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 18568e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 18578e09f215SStefan Weinhuber } else { 18588e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 18598e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 18608e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 18618e09f215SStefan Weinhuber * Try again later. 18628e09f215SStefan Weinhuber */ 18638e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 18648e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 18658e09f215SStefan Weinhuber } 18668e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 18678e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 18688e09f215SStefan Weinhuber } 18691da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 18701da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 18711da177e4SLinus Torvalds recid = first_rec; 18721da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 18731da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 18741da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18751da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 18768e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 18771da177e4SLinus Torvalds } 18785705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 18791da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 18801da177e4SLinus Torvalds if (dasd_page_cache) { 18811da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1882441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 18831da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 18841da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 18851da177e4SLinus Torvalds if (copy) 18861da177e4SLinus Torvalds dst = copy + bv->bv_offset; 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 18891da177e4SLinus Torvalds sector_t trkid = recid; 18901da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 18911da177e4SLinus Torvalds rcmd = cmd; 18921da177e4SLinus Torvalds count = blksize; 18931da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 18941da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 18951da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 18961da177e4SLinus Torvalds rcmd |= 0x8; 18971da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1898ec5883abSHorst Hummel if (count < blksize && 1899ec5883abSHorst Hummel rq_data_dir(req) == READ) 19001da177e4SLinus Torvalds memset(dst + count, 0xe5, 19011da177e4SLinus Torvalds blksize - count); 19021da177e4SLinus Torvalds } 19031da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19041da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19051da177e4SLinus Torvalds trkid, recoffs + 1, 19068e09f215SStefan Weinhuber 1, rcmd, basedev, count); 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 19091da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 19101da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19111da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19121da177e4SLinus Torvalds trkid, recoffs + 1, 19131da177e4SLinus Torvalds last_rec - recid + 1, 19148e09f215SStefan Weinhuber cmd, basedev, count); 19151da177e4SLinus Torvalds } 19161da177e4SLinus Torvalds /* Read/write ccw. */ 19171da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19181da177e4SLinus Torvalds ccw->cmd_code = rcmd; 19191da177e4SLinus Torvalds ccw->count = count; 19201da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 19211da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 19221da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 19231da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 19241da177e4SLinus Torvalds } else { 19251da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 19261da177e4SLinus Torvalds ccw->flags = 0; 19271da177e4SLinus Torvalds } 19281da177e4SLinus Torvalds ccw++; 19291da177e4SLinus Torvalds dst += blksize; 19301da177e4SLinus Torvalds recid++; 19311da177e4SLinus Torvalds } 19321da177e4SLinus Torvalds } 193313de227bSHolger Smolinski if (blk_noretry_request(req) || 193413de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 19351c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 19368e09f215SStefan Weinhuber cqr->startdev = startdev; 19378e09f215SStefan Weinhuber cqr->memdev = startdev; 19388e09f215SStefan Weinhuber cqr->block = block; 19391da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 19401da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 19411da177e4SLinus Torvalds cqr->retries = 256; 19421da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19431da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19441da177e4SLinus Torvalds return cqr; 19451da177e4SLinus Torvalds } 19461da177e4SLinus Torvalds 1947f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 1948f3eb5384SStefan Weinhuber struct dasd_device *startdev, 1949f3eb5384SStefan Weinhuber struct dasd_block *block, 1950f3eb5384SStefan Weinhuber struct request *req, 1951f3eb5384SStefan Weinhuber sector_t first_rec, 1952f3eb5384SStefan Weinhuber sector_t last_rec, 1953f3eb5384SStefan Weinhuber sector_t first_trk, 1954f3eb5384SStefan Weinhuber sector_t last_trk, 1955f3eb5384SStefan Weinhuber unsigned int first_offs, 1956f3eb5384SStefan Weinhuber unsigned int last_offs, 1957f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1958f3eb5384SStefan Weinhuber unsigned int blksize) 1959f3eb5384SStefan Weinhuber { 1960f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 1961f3eb5384SStefan Weinhuber unsigned long *idaws; 1962f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 1963f3eb5384SStefan Weinhuber struct ccw1 *ccw; 1964f3eb5384SStefan Weinhuber struct req_iterator iter; 1965f3eb5384SStefan Weinhuber struct bio_vec *bv; 1966f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 1967f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 1968f3eb5384SStefan Weinhuber unsigned int tlf; 1969f3eb5384SStefan Weinhuber sector_t recid; 1970f3eb5384SStefan Weinhuber unsigned char cmd; 1971f3eb5384SStefan Weinhuber struct dasd_device *basedev; 1972f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 1973f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 1974f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 1975f3eb5384SStefan Weinhuber sector_t trkid; 1976f3eb5384SStefan Weinhuber unsigned int recoffs; 1977f3eb5384SStefan Weinhuber 1978f3eb5384SStefan Weinhuber basedev = block->base; 1979f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 1980f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 1981f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 1982f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 1983f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 1984f3eb5384SStefan Weinhuber else 1985f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 1986f3eb5384SStefan Weinhuber 1987f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 1988f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 1989f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 1990f3eb5384SStefan Weinhuber * of records as upper limit. 1991f3eb5384SStefan Weinhuber */ 1992f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 1993f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 1994f3eb5384SStefan Weinhuber 1995f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 1996f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 1997f3eb5384SStefan Weinhuber 1998f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 1999f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2000f3eb5384SStefan Weinhuber */ 2001f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2002f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2003f3eb5384SStefan Weinhuber 2004f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 200568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 200668b781feSStefan Haberland startdev); 2007f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2008f3eb5384SStefan Weinhuber return cqr; 2009f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2010f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2011f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2012f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2013f3eb5384SStefan Weinhuber else 2014f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2015f3eb5384SStefan Weinhuber tlf *= blksize; 2016f3eb5384SStefan Weinhuber 2017f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2018f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2019f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2020f3eb5384SStefan Weinhuber trkcount, blksize, 2021f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2022f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2023f3eb5384SStefan Weinhuber * Try again later. 2024f3eb5384SStefan Weinhuber */ 2025f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2026f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2027f3eb5384SStefan Weinhuber } 2028f3eb5384SStefan Weinhuber 2029f3eb5384SStefan Weinhuber /* 2030f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2031f3eb5384SStefan Weinhuber * following conditions: 2032f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2033f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2034f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2035f3eb5384SStefan Weinhuber */ 2036f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2037f3eb5384SStefan Weinhuber recid = first_rec; 2038f3eb5384SStefan Weinhuber new_track = 1; 2039f3eb5384SStefan Weinhuber end_idaw = 0; 2040f3eb5384SStefan Weinhuber len_to_track_end = 0; 2041f3eb5384SStefan Weinhuber idaw_dst = 0; 2042f3eb5384SStefan Weinhuber idaw_len = 0; 2043f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2044f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2045f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2046f3eb5384SStefan Weinhuber while (seg_len) { 2047f3eb5384SStefan Weinhuber if (new_track) { 2048f3eb5384SStefan Weinhuber trkid = recid; 2049f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2050f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2051f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2052f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2053f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2054f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2055f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2056f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2057f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2058f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2059f3eb5384SStefan Weinhuber ccw++; 2060f3eb5384SStefan Weinhuber recid += count; 2061f3eb5384SStefan Weinhuber new_track = 0; 206252db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 206352db45c3SStefan Weinhuber if (!idaw_dst) 206452db45c3SStefan Weinhuber idaw_dst = dst; 2065f3eb5384SStefan Weinhuber } 206652db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 206752db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2068f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2069f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2070f3eb5384SStefan Weinhuber * idaw ends 2071f3eb5384SStefan Weinhuber */ 207252db45c3SStefan Weinhuber if (!idaw_dst) { 207352db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 207452db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 207552db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 207652db45c3SStefan Weinhuber } else 2077f3eb5384SStefan Weinhuber idaw_dst = dst; 207852db45c3SStefan Weinhuber } 2079f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2080f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2081f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2082f3eb5384SStefan Weinhuber } 2083f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2084f3eb5384SStefan Weinhuber seg_len -= part_len; 2085f3eb5384SStefan Weinhuber dst += part_len; 2086f3eb5384SStefan Weinhuber idaw_len += part_len; 2087f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2088f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2089f3eb5384SStefan Weinhuber * -> create an idaw 2090f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2091f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2092f3eb5384SStefan Weinhuber */ 2093f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2094f3eb5384SStefan Weinhuber end_idaw = 1; 2095f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2096f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2097f3eb5384SStefan Weinhuber new_track = 1; 2098f3eb5384SStefan Weinhuber end_idaw = 1; 2099f3eb5384SStefan Weinhuber } 2100f3eb5384SStefan Weinhuber if (end_idaw) { 2101f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2102f3eb5384SStefan Weinhuber idaw_len); 2103f3eb5384SStefan Weinhuber idaw_dst = 0; 2104f3eb5384SStefan Weinhuber idaw_len = 0; 2105f3eb5384SStefan Weinhuber end_idaw = 0; 2106f3eb5384SStefan Weinhuber } 2107f3eb5384SStefan Weinhuber } 2108f3eb5384SStefan Weinhuber } 2109f3eb5384SStefan Weinhuber 2110f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2111f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2112f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2113f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2114f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2115f3eb5384SStefan Weinhuber cqr->block = block; 2116f3eb5384SStefan Weinhuber cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2117f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2118f3eb5384SStefan Weinhuber cqr->retries = 256; 2119f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2120f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2121f3eb5384SStefan Weinhuber return cqr; 2122f3eb5384SStefan Weinhuber } 2123f3eb5384SStefan Weinhuber 2124f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2125f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2126f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2127f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2128f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2129f3eb5384SStefan Weinhuber unsigned int blksize, 2130f3eb5384SStefan Weinhuber unsigned int total_data_size, 2131f3eb5384SStefan Weinhuber unsigned int tlf, 2132f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2133f3eb5384SStefan Weinhuber { 2134f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2135f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2136f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2137f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2138f3eb5384SStefan Weinhuber struct dcw *dcw; 2139f3eb5384SStefan Weinhuber 2140f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2141f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2142f3eb5384SStefan Weinhuber u8 pfx_cmd; 2143f3eb5384SStefan Weinhuber 2144f3eb5384SStefan Weinhuber int rc = 0; 2145f3eb5384SStefan Weinhuber int sector = 0; 2146f3eb5384SStefan Weinhuber int dn, d; 2147f3eb5384SStefan Weinhuber 2148f3eb5384SStefan Weinhuber 2149f3eb5384SStefan Weinhuber /* setup prefix data */ 2150f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2151f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2152f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2153f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2154f3eb5384SStefan Weinhuber 2155f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2156f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2157f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2158f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2159f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2160f3eb5384SStefan Weinhuber 2161f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2162f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2163f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2164f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2165f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2166f3eb5384SStefan Weinhuber } 2167f3eb5384SStefan Weinhuber 2168f3eb5384SStefan Weinhuber switch (cmd) { 2169f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2170f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2171f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2172f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2173f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2174f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2175f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2176f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2177f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2178f3eb5384SStefan Weinhuber break; 2179f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2180f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2181f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2182f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2183f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2184f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2185f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2186f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2187f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2188f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2189f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2190f3eb5384SStefan Weinhuber break; 2191f3eb5384SStefan Weinhuber default: 2192f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2193f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2194f3eb5384SStefan Weinhuber BUG(); 2195f3eb5384SStefan Weinhuber break; 2196f3eb5384SStefan Weinhuber } 2197f3eb5384SStefan Weinhuber if (rc) 2198f3eb5384SStefan Weinhuber return rc; 2199f3eb5384SStefan Weinhuber 2200f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2201f3eb5384SStefan Weinhuber 2202f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2203f3eb5384SStefan Weinhuber begcyl = trk / heads; 2204f3eb5384SStefan Weinhuber beghead = trk % heads; 2205f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2206f3eb5384SStefan Weinhuber endhead = totrk % heads; 2207f3eb5384SStefan Weinhuber 2208f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2209f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2210f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2211f3eb5384SStefan Weinhuber 2212f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2213f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2214f3eb5384SStefan Weinhuber else 2215f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2216f3eb5384SStefan Weinhuber } 2217f3eb5384SStefan Weinhuber 2218f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2219f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2220f3eb5384SStefan Weinhuber 2221f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2222f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2223f3eb5384SStefan Weinhuber 2224f3eb5384SStefan Weinhuber if (rec_on_trk) { 2225f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2226f3eb5384SStefan Weinhuber case 0x3390: 2227f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2228f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2229f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2230f3eb5384SStefan Weinhuber break; 2231f3eb5384SStefan Weinhuber case 0x3380: 2232f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2233f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2234f3eb5384SStefan Weinhuber break; 2235f3eb5384SStefan Weinhuber } 2236f3eb5384SStefan Weinhuber } 2237f3eb5384SStefan Weinhuber 2238f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2239f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2240f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2241f3eb5384SStefan Weinhuber lredata->length = tlf; 2242f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2243f3eb5384SStefan Weinhuber lredata->count = count; 2244f3eb5384SStefan Weinhuber lredata->sector = sector; 2245f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2246f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2247f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2248f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2249f3eb5384SStefan Weinhuber 2250f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2251f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2252f3eb5384SStefan Weinhuber 2253f3eb5384SStefan Weinhuber return rc; 2254f3eb5384SStefan Weinhuber } 2255f3eb5384SStefan Weinhuber 2256f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2257f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2258f3eb5384SStefan Weinhuber struct dasd_block *block, 2259f3eb5384SStefan Weinhuber struct request *req, 2260f3eb5384SStefan Weinhuber sector_t first_rec, 2261f3eb5384SStefan Weinhuber sector_t last_rec, 2262f3eb5384SStefan Weinhuber sector_t first_trk, 2263f3eb5384SStefan Weinhuber sector_t last_trk, 2264f3eb5384SStefan Weinhuber unsigned int first_offs, 2265f3eb5384SStefan Weinhuber unsigned int last_offs, 2266f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2267f3eb5384SStefan Weinhuber unsigned int blksize) 2268f3eb5384SStefan Weinhuber { 2269f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2270f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2271f3eb5384SStefan Weinhuber struct req_iterator iter; 2272f3eb5384SStefan Weinhuber struct bio_vec *bv; 2273f3eb5384SStefan Weinhuber char *dst; 2274f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2275f3eb5384SStefan Weinhuber unsigned char cmd; 2276f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2277f3eb5384SStefan Weinhuber unsigned int tlf; 2278f3eb5384SStefan Weinhuber struct itcw *itcw; 2279f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2280f3eb5384SStefan Weinhuber int itcw_op; 2281f3eb5384SStefan Weinhuber size_t itcw_size; 2282f3eb5384SStefan Weinhuber 2283f3eb5384SStefan Weinhuber basedev = block->base; 2284f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2285f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2286f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2287f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2288f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2289f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2290f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2291f3eb5384SStefan Weinhuber } else 2292f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2293f3eb5384SStefan Weinhuber 2294f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2295f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2296f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2297f3eb5384SStefan Weinhuber */ 2298f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2299f3eb5384SStefan Weinhuber ctidaw = 0; 2300f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2301f3eb5384SStefan Weinhuber ++ctidaw; 2302f3eb5384SStefan Weinhuber } 2303f3eb5384SStefan Weinhuber 2304f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2305f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 230668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2307f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2308f3eb5384SStefan Weinhuber return cqr; 2309f3eb5384SStefan Weinhuber 2310f3eb5384SStefan Weinhuber cqr->cpmode = 1; 2311f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2312f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2313f3eb5384SStefan Weinhuber cqr->block = block; 2314f3eb5384SStefan Weinhuber cqr->expires = 100*HZ; 2315f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2316f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2317f3eb5384SStefan Weinhuber cqr->retries = 10; 2318f3eb5384SStefan Weinhuber 2319f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2320f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2321f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2322f3eb5384SStefan Weinhuber else 2323f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2324f3eb5384SStefan Weinhuber tlf *= blksize; 2325f3eb5384SStefan Weinhuber 2326f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2327f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2328f3eb5384SStefan Weinhuber 2329f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2330f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2331f3eb5384SStefan Weinhuber first_offs + 1, 2332f3eb5384SStefan Weinhuber trkcount, blksize, 2333f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2334f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2335f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2336f3eb5384SStefan Weinhuber * Try again later. 2337f3eb5384SStefan Weinhuber */ 2338f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2339f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2340f3eb5384SStefan Weinhuber } 2341f3eb5384SStefan Weinhuber 2342f3eb5384SStefan Weinhuber /* 2343f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2344f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2345f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2346f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2347f3eb5384SStefan Weinhuber */ 2348f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2349f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2350f3eb5384SStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len); 2351f3eb5384SStefan Weinhuber if (IS_ERR(last_tidaw)) 2352f3eb5384SStefan Weinhuber return (struct dasd_ccw_req *)last_tidaw; 2353f3eb5384SStefan Weinhuber } 2354f3eb5384SStefan Weinhuber 2355f3eb5384SStefan Weinhuber last_tidaw->flags |= 0x80; 2356f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2357f3eb5384SStefan Weinhuber 2358f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2359f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2360f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2361f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2362f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2363f3eb5384SStefan Weinhuber cqr->block = block; 2364f3eb5384SStefan Weinhuber cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2365f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2366f3eb5384SStefan Weinhuber cqr->retries = 256; 2367f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2368f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2369f3eb5384SStefan Weinhuber return cqr; 2370f3eb5384SStefan Weinhuber } 2371f3eb5384SStefan Weinhuber 2372f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2373f3eb5384SStefan Weinhuber struct dasd_block *block, 2374f3eb5384SStefan Weinhuber struct request *req) 2375f3eb5384SStefan Weinhuber { 2376f3eb5384SStefan Weinhuber int tpm, cmdrtd, cmdwtd; 2377f3eb5384SStefan Weinhuber int use_prefix; 237845b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2379f3eb5384SStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 238045b44d76SStefan Weinhuber #endif 238145b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2382f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2383f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2384f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2385f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2386f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2387f3eb5384SStefan Weinhuber int cdlspecial; 2388f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2389f3eb5384SStefan Weinhuber 2390f3eb5384SStefan Weinhuber basedev = block->base; 2391f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2392f3eb5384SStefan Weinhuber 2393f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2394f3eb5384SStefan Weinhuber blksize = block->bp_block; 2395f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 23966fca97a9SStefan Haberland if (blk_per_trk == 0) 23976fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2398f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 239983096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2400f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2401f3eb5384SStefan Weinhuber last_rec = last_trk = 240283096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2403f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2404f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2405f3eb5384SStefan Weinhuber 2406f3eb5384SStefan Weinhuber /* is transport mode supported? */ 240745b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2408f3eb5384SStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 2409f3eb5384SStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 2410f3eb5384SStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 2411f3eb5384SStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 241245b44d76SStefan Weinhuber #else 241345b44d76SStefan Weinhuber tpm = 0; 241445b44d76SStefan Weinhuber #endif 2415f3eb5384SStefan Weinhuber 2416f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2417f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2418f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2419f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2420f3eb5384SStefan Weinhuber 2421f3eb5384SStefan Weinhuber cqr = NULL; 2422f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2423f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2424f3eb5384SStefan Weinhuber } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) { 2425f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2426f3eb5384SStefan Weinhuber first_rec, last_rec, 2427f3eb5384SStefan Weinhuber first_trk, last_trk, 2428f3eb5384SStefan Weinhuber first_offs, last_offs, 2429f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2430f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2431f3eb5384SStefan Weinhuber cqr = NULL; 2432f3eb5384SStefan Weinhuber } else if (use_prefix && 2433f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2434f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2435f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2436f3eb5384SStefan Weinhuber first_rec, last_rec, 2437f3eb5384SStefan Weinhuber first_trk, last_trk, 2438f3eb5384SStefan Weinhuber first_offs, last_offs, 2439f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2440f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2441f3eb5384SStefan Weinhuber cqr = NULL; 2442f3eb5384SStefan Weinhuber } 2443f3eb5384SStefan Weinhuber if (!cqr) 2444f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2445f3eb5384SStefan Weinhuber first_rec, last_rec, 2446f3eb5384SStefan Weinhuber first_trk, last_trk, 2447f3eb5384SStefan Weinhuber first_offs, last_offs, 2448f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2449f3eb5384SStefan Weinhuber return cqr; 2450f3eb5384SStefan Weinhuber } 2451f3eb5384SStefan Weinhuber 24521da177e4SLinus Torvalds static int 24531da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 24541da177e4SLinus Torvalds { 24551da177e4SLinus Torvalds struct dasd_eckd_private *private; 24561da177e4SLinus Torvalds struct ccw1 *ccw; 24575705f702SNeilBrown struct req_iterator iter; 24581da177e4SLinus Torvalds struct bio_vec *bv; 24591da177e4SLinus Torvalds char *dst, *cda; 24601da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 24611da177e4SLinus Torvalds sector_t recid; 24625705f702SNeilBrown int status; 24631da177e4SLinus Torvalds 24641da177e4SLinus Torvalds if (!dasd_page_cache) 24651da177e4SLinus Torvalds goto out; 24668e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 24678e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 24681da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 246983096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 24701da177e4SLinus Torvalds ccw = cqr->cpaddr; 24711da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 24721da177e4SLinus Torvalds ccw++; 24731da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 24741da177e4SLinus Torvalds ccw++; 24755705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 24761da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 24771da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 24781da177e4SLinus Torvalds /* Skip locate record. */ 24791da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 24801da177e4SLinus Torvalds ccw++; 24811da177e4SLinus Torvalds if (dst) { 24821da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 24831da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 24841da177e4SLinus Torvalds else 24851da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 24861da177e4SLinus Torvalds if (dst != cda) { 24871da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 24881da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 24891da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 24901da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 24911da177e4SLinus Torvalds } 24921da177e4SLinus Torvalds dst = NULL; 24931da177e4SLinus Torvalds } 24941da177e4SLinus Torvalds ccw++; 24951da177e4SLinus Torvalds recid++; 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds } 24981da177e4SLinus Torvalds out: 24991da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 25008e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 25011da177e4SLinus Torvalds return status; 25021da177e4SLinus Torvalds } 25031da177e4SLinus Torvalds 25048e09f215SStefan Weinhuber /* 2505f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 25068e09f215SStefan Weinhuber * 25078e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 25088e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 25098e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 25108e09f215SStefan Weinhuber */ 25118e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 25128e09f215SStefan Weinhuber { 25138e09f215SStefan Weinhuber struct ccw1 *ccw; 25148e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 2515f3eb5384SStefan Weinhuber struct tcw *tcw; 2516f3eb5384SStefan Weinhuber struct tccb *tccb; 2517f3eb5384SStefan Weinhuber struct dcw *dcw; 25188e09f215SStefan Weinhuber 2519f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 2520f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 2521f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 2522f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 2523f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2524f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 2525f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 2526f3eb5384SStefan Weinhuber } else { 25278e09f215SStefan Weinhuber ccw = cqr->cpaddr; 25288e09f215SStefan Weinhuber pfxdata = cqr->data; 25298e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 25308e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 25318e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 25328e09f215SStefan Weinhuber } 25338e09f215SStefan Weinhuber } 2534f3eb5384SStefan Weinhuber } 25358e09f215SStefan Weinhuber 25368e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 25378e09f215SStefan Weinhuber 25388e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 25398e09f215SStefan Weinhuber struct dasd_block *block, 25408e09f215SStefan Weinhuber struct request *req) 25418e09f215SStefan Weinhuber { 25428e09f215SStefan Weinhuber struct dasd_eckd_private *private; 25438e09f215SStefan Weinhuber struct dasd_device *startdev; 25448e09f215SStefan Weinhuber unsigned long flags; 25458e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 25468e09f215SStefan Weinhuber 25478e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 25488e09f215SStefan Weinhuber if (!startdev) 25498e09f215SStefan Weinhuber startdev = base; 25508e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 25518e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 25528e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 25538e09f215SStefan Weinhuber 25548e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 25558e09f215SStefan Weinhuber private->count++; 25568e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 25578e09f215SStefan Weinhuber if (IS_ERR(cqr)) 25588e09f215SStefan Weinhuber private->count--; 25598e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 25608e09f215SStefan Weinhuber return cqr; 25618e09f215SStefan Weinhuber } 25628e09f215SStefan Weinhuber 25638e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 25648e09f215SStefan Weinhuber struct request *req) 25658e09f215SStefan Weinhuber { 25668e09f215SStefan Weinhuber struct dasd_eckd_private *private; 25678e09f215SStefan Weinhuber unsigned long flags; 25688e09f215SStefan Weinhuber 25698e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 25708e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 25718e09f215SStefan Weinhuber private->count--; 25728e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 25738e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 25748e09f215SStefan Weinhuber } 25758e09f215SStefan Weinhuber 25761da177e4SLinus Torvalds static int 25771da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 25781da177e4SLinus Torvalds struct dasd_information2_t * info) 25791da177e4SLinus Torvalds { 25801da177e4SLinus Torvalds struct dasd_eckd_private *private; 25811da177e4SLinus Torvalds 25821da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 25831da177e4SLinus Torvalds info->label_block = 2; 25841da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 25851da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 25861da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 25871da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 25881da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 25894abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 25904abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 25914abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 25924abb08c2SStefan Weinhuber info->confdata_size); 25931da177e4SLinus Torvalds return 0; 25941da177e4SLinus Torvalds } 25951da177e4SLinus Torvalds 25961da177e4SLinus Torvalds /* 25971da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 25981da177e4SLinus Torvalds */ 25991da177e4SLinus Torvalds 26001da177e4SLinus Torvalds /* 26011da177e4SLinus Torvalds * Release device ioctl. 26021da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 26031da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 26041da177e4SLinus Torvalds */ 26051da177e4SLinus Torvalds static int 26061107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 26071da177e4SLinus Torvalds { 26081da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26091da177e4SLinus Torvalds int rc; 2610f3eb5384SStefan Weinhuber struct ccw1 *ccw; 26111da177e4SLinus Torvalds 26121da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26131da177e4SLinus Torvalds return -EACCES; 26141da177e4SLinus Torvalds 261568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 26161da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2617fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 26181da177e4SLinus Torvalds "Could not allocate initialization request"); 26191da177e4SLinus Torvalds return PTR_ERR(cqr); 26201da177e4SLinus Torvalds } 2621f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2622f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2623f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2624f3eb5384SStefan Weinhuber ccw->count = 32; 2625f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 26268e09f215SStefan Weinhuber cqr->startdev = device; 26278e09f215SStefan Weinhuber cqr->memdev = device; 26281da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 26291c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2630336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 26311da177e4SLinus Torvalds cqr->expires = 2 * HZ; 26321da177e4SLinus Torvalds cqr->buildclk = get_clock(); 26331da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 26341da177e4SLinus Torvalds 26351da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 26361da177e4SLinus Torvalds 26378e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 26381da177e4SLinus Torvalds return rc; 26391da177e4SLinus Torvalds } 26401da177e4SLinus Torvalds 26411da177e4SLinus Torvalds /* 26421da177e4SLinus Torvalds * Reserve device ioctl. 26431da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 26441da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 26451da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 26461da177e4SLinus Torvalds */ 26471da177e4SLinus Torvalds static int 26481107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 26491da177e4SLinus Torvalds { 26501da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26511da177e4SLinus Torvalds int rc; 2652f3eb5384SStefan Weinhuber struct ccw1 *ccw; 26531da177e4SLinus Torvalds 26541da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26551da177e4SLinus Torvalds return -EACCES; 26561da177e4SLinus Torvalds 265768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 26581da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2659fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 26601da177e4SLinus Torvalds "Could not allocate initialization request"); 26611da177e4SLinus Torvalds return PTR_ERR(cqr); 26621da177e4SLinus Torvalds } 2663f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2664f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2665f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2666f3eb5384SStefan Weinhuber ccw->count = 32; 2667f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 26688e09f215SStefan Weinhuber cqr->startdev = device; 26698e09f215SStefan Weinhuber cqr->memdev = device; 26701da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 26711c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2672336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 26731da177e4SLinus Torvalds cqr->expires = 2 * HZ; 26741da177e4SLinus Torvalds cqr->buildclk = get_clock(); 26751da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 26761da177e4SLinus Torvalds 26771da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 26781da177e4SLinus Torvalds 26798e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 26801da177e4SLinus Torvalds return rc; 26811da177e4SLinus Torvalds } 26821da177e4SLinus Torvalds 26831da177e4SLinus Torvalds /* 26841da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 26851da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 26861da177e4SLinus Torvalds * (unconditional reserve) 26871da177e4SLinus Torvalds */ 26881da177e4SLinus Torvalds static int 26891107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 26901da177e4SLinus Torvalds { 26911da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26921da177e4SLinus Torvalds int rc; 2693f3eb5384SStefan Weinhuber struct ccw1 *ccw; 26941da177e4SLinus Torvalds 26951da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26961da177e4SLinus Torvalds return -EACCES; 26971da177e4SLinus Torvalds 269868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 26991da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2700fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 27011da177e4SLinus Torvalds "Could not allocate initialization request"); 27021da177e4SLinus Torvalds return PTR_ERR(cqr); 27031da177e4SLinus Torvalds } 2704f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2705f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 2706f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2707f3eb5384SStefan Weinhuber ccw->count = 32; 2708f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 27098e09f215SStefan Weinhuber cqr->startdev = device; 27108e09f215SStefan Weinhuber cqr->memdev = device; 27111da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27121c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2713336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 27141da177e4SLinus Torvalds cqr->expires = 2 * HZ; 27151da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27161da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27171da177e4SLinus Torvalds 27181da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 27191da177e4SLinus Torvalds 27208e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27211da177e4SLinus Torvalds return rc; 27221da177e4SLinus Torvalds } 27231da177e4SLinus Torvalds 27241da177e4SLinus Torvalds /* 27251da177e4SLinus Torvalds * Read performance statistics 27261da177e4SLinus Torvalds */ 27271da177e4SLinus Torvalds static int 27281107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 27291da177e4SLinus Torvalds { 27301da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 27311da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 27321da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27331da177e4SLinus Torvalds struct ccw1 *ccw; 27341da177e4SLinus Torvalds int rc; 27351da177e4SLinus Torvalds 273668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 27371da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 27381da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 27391da177e4SLinus Torvalds device); 27401da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2741fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 27421da177e4SLinus Torvalds "Could not allocate initialization request"); 27431da177e4SLinus Torvalds return PTR_ERR(cqr); 27441da177e4SLinus Torvalds } 27458e09f215SStefan Weinhuber cqr->startdev = device; 27468e09f215SStefan Weinhuber cqr->memdev = device; 27471da177e4SLinus Torvalds cqr->retries = 0; 2748eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27491da177e4SLinus Torvalds cqr->expires = 10 * HZ; 27501da177e4SLinus Torvalds 27511da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 27521da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 27531da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 27541da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 27555d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 27561da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 27571da177e4SLinus Torvalds 27581da177e4SLinus Torvalds ccw = cqr->cpaddr; 27591da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 27601da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 27611da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 27621da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 27631da177e4SLinus Torvalds 27641da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 27651da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 27661da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 27671da177e4SLinus Torvalds 27681da177e4SLinus Torvalds ccw++; 27691da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 27701da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 27711da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 27721da177e4SLinus Torvalds 27731da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27741da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27751da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 27761da177e4SLinus Torvalds if (rc == 0) { 27771da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 27781da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 27791107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 27801107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 27811107ccfbSChristoph Hellwig rc = -EFAULT; 27821da177e4SLinus Torvalds } 27838e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27841da177e4SLinus Torvalds return rc; 27851da177e4SLinus Torvalds } 27861da177e4SLinus Torvalds 27871da177e4SLinus Torvalds /* 27881da177e4SLinus Torvalds * Get attributes (cache operations) 27891da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 27901da177e4SLinus Torvalds */ 27911da177e4SLinus Torvalds static int 27921107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 27931da177e4SLinus Torvalds { 27941107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 27951107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 27961107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 27971da177e4SLinus Torvalds int rc; 27981da177e4SLinus Torvalds 27991da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 28001da177e4SLinus Torvalds return -EACCES; 28011107ccfbSChristoph Hellwig if (!argp) 28021da177e4SLinus Torvalds return -EINVAL; 28031da177e4SLinus Torvalds 28041107ccfbSChristoph Hellwig rc = 0; 28051107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 28061107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 28071107ccfbSChristoph Hellwig rc = -EFAULT; 28081da177e4SLinus Torvalds 28091da177e4SLinus Torvalds return rc; 28101da177e4SLinus Torvalds } 28111da177e4SLinus Torvalds 28121da177e4SLinus Torvalds /* 28131da177e4SLinus Torvalds * Set attributes (cache operations) 28141da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 28151da177e4SLinus Torvalds */ 28161da177e4SLinus Torvalds static int 28171107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 28181da177e4SLinus Torvalds { 28191107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 28201107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 28211da177e4SLinus Torvalds struct attrib_data_t attrib; 28221da177e4SLinus Torvalds 28231da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 28241da177e4SLinus Torvalds return -EACCES; 28251107ccfbSChristoph Hellwig if (!argp) 28261da177e4SLinus Torvalds return -EINVAL; 28271da177e4SLinus Torvalds 28281107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 28291da177e4SLinus Torvalds return -EFAULT; 28301da177e4SLinus Torvalds private->attrib = attrib; 28311da177e4SLinus Torvalds 2832fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2833fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 28341da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 28351da177e4SLinus Torvalds return 0; 28361da177e4SLinus Torvalds } 28371da177e4SLinus Torvalds 2838ab1d848fSNigel Hislop /* 2839ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 2840ab1d848fSNigel Hislop * CCWs are PSF and RSSD 2841ab1d848fSNigel Hislop */ 2842ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2843ab1d848fSNigel Hislop { 2844ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 2845ab1d848fSNigel Hislop char *psf_data, *rssd_result; 2846ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 2847ab1d848fSNigel Hislop struct ccw1 *ccw; 284852898025SNigel Hislop char psf0, psf1; 2849ab1d848fSNigel Hislop int rc; 2850ab1d848fSNigel Hislop 285152898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 285252898025SNigel Hislop return -EACCES; 285352898025SNigel Hislop psf0 = psf1 = 0; 285452898025SNigel Hislop 2855ab1d848fSNigel Hislop /* Copy parms from caller */ 2856ab1d848fSNigel Hislop rc = -EFAULT; 2857ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2858ab1d848fSNigel Hislop goto out; 2859f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 2860ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 2861ab1d848fSNigel Hislop rc = -EINVAL; 2862f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 2863ab1d848fSNigel Hislop goto out; 2864f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 2865f8b06859SHeiko Carstens goto out; 2866f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 2867f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 2868ab1d848fSNigel Hislop } 2869ab1d848fSNigel Hislop /* alloc I/O data area */ 2870ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2871ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2872ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 2873ab1d848fSNigel Hislop rc = -ENOMEM; 2874ab1d848fSNigel Hislop goto out_free; 2875ab1d848fSNigel Hislop } 2876ab1d848fSNigel Hislop 2877ab1d848fSNigel Hislop /* get syscall header from user space */ 2878ab1d848fSNigel Hislop rc = -EFAULT; 2879ab1d848fSNigel Hislop if (copy_from_user(psf_data, 2880ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 2881ab1d848fSNigel Hislop usrparm.psf_data_len)) 2882ab1d848fSNigel Hislop goto out_free; 288352898025SNigel Hislop psf0 = psf_data[0]; 288452898025SNigel Hislop psf1 = psf_data[1]; 2885ab1d848fSNigel Hislop 2886ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 288768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 2888ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 2889fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2890ab1d848fSNigel Hislop "Could not allocate initialization request"); 2891ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 2892ab1d848fSNigel Hislop goto out_free; 2893ab1d848fSNigel Hislop } 2894ab1d848fSNigel Hislop 2895ab1d848fSNigel Hislop cqr->startdev = device; 2896ab1d848fSNigel Hislop cqr->memdev = device; 2897ab1d848fSNigel Hislop cqr->retries = 3; 2898ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 2899ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 2900ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 2901ab1d848fSNigel Hislop 2902ab1d848fSNigel Hislop /* Build the ccws */ 2903ab1d848fSNigel Hislop ccw = cqr->cpaddr; 2904ab1d848fSNigel Hislop 2905ab1d848fSNigel Hislop /* PSF ccw */ 2906ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 2907ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 2908ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 2909ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 2910ab1d848fSNigel Hislop 2911ab1d848fSNigel Hislop ccw++; 2912ab1d848fSNigel Hislop 2913ab1d848fSNigel Hislop /* RSSD ccw */ 2914ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2915ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 2916ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 2917ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 2918ab1d848fSNigel Hislop 2919ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 2920ab1d848fSNigel Hislop if (rc) 2921ab1d848fSNigel Hislop goto out_sfree; 2922ab1d848fSNigel Hislop 2923ab1d848fSNigel Hislop rc = -EFAULT; 2924ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 2925ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 2926ab1d848fSNigel Hislop goto out_sfree; 2927ab1d848fSNigel Hislop rc = 0; 2928ab1d848fSNigel Hislop 2929ab1d848fSNigel Hislop out_sfree: 2930ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 2931ab1d848fSNigel Hislop out_free: 2932ab1d848fSNigel Hislop kfree(rssd_result); 2933ab1d848fSNigel Hislop kfree(psf_data); 2934ab1d848fSNigel Hislop out: 293552898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 293652898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 293752898025SNigel Hislop (int) psf0, (int) psf1, rc); 2938ab1d848fSNigel Hislop return rc; 2939ab1d848fSNigel Hislop } 2940ab1d848fSNigel Hislop 29411107ccfbSChristoph Hellwig static int 29428e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 29431107ccfbSChristoph Hellwig { 29448e09f215SStefan Weinhuber struct dasd_device *device = block->base; 29458e09f215SStefan Weinhuber 29461107ccfbSChristoph Hellwig switch (cmd) { 29471107ccfbSChristoph Hellwig case BIODASDGATTR: 29481107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 29491107ccfbSChristoph Hellwig case BIODASDSATTR: 29501107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 29511107ccfbSChristoph Hellwig case BIODASDPSRD: 29521107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 29531107ccfbSChristoph Hellwig case BIODASDRLSE: 29541107ccfbSChristoph Hellwig return dasd_eckd_release(device); 29551107ccfbSChristoph Hellwig case BIODASDRSRV: 29561107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 29571107ccfbSChristoph Hellwig case BIODASDSLCK: 29581107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 2959ab1d848fSNigel Hislop case BIODASDSYMMIO: 2960ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 29611107ccfbSChristoph Hellwig default: 29621107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 29631107ccfbSChristoph Hellwig } 29641107ccfbSChristoph Hellwig } 29651107ccfbSChristoph Hellwig 29661da177e4SLinus Torvalds /* 2967445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 2968445b5b49SHorst Hummel * and return number of printed chars. 2969445b5b49SHorst Hummel */ 29704d284cacSHeiko Carstens static int 2971445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 2972445b5b49SHorst Hummel { 2973445b5b49SHorst Hummel int len, count; 2974445b5b49SHorst Hummel char *datap; 2975445b5b49SHorst Hummel 2976445b5b49SHorst Hummel len = 0; 2977445b5b49SHorst Hummel while (from <= to) { 2978445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2979445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 2980445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 2981445b5b49SHorst Hummel 2982445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 2983445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 2984445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 2985445b5b49SHorst Hummel else 2986445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 2987445b5b49SHorst Hummel 2988445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 2989445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 2990445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 2991445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 2992445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 2993445b5b49SHorst Hummel } 2994445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 2995445b5b49SHorst Hummel from++; 2996445b5b49SHorst Hummel } 2997445b5b49SHorst Hummel return len; 2998445b5b49SHorst Hummel } 2999445b5b49SHorst Hummel 3000fc19f381SStefan Haberland static void 3001aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3002aeec92caSStefan Haberland char *reason) 3003fc19f381SStefan Haberland { 3004fc19f381SStefan Haberland u64 *sense; 3005fc19f381SStefan Haberland 3006aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3007fc19f381SStefan Haberland if (sense) { 3008fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, 3009aeec92caSStefan Haberland "%s: %s %02x%02x%02x %016llx %016llx %016llx " 3010aeec92caSStefan Haberland "%016llx", reason, 3011aeec92caSStefan Haberland scsw_is_tm(&irb->scsw) ? "t" : "c", 3012aeec92caSStefan Haberland scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), 3013aeec92caSStefan Haberland scsw_dstat(&irb->scsw), sense[0], sense[1], 3014aeec92caSStefan Haberland sense[2], sense[3]); 3015fc19f381SStefan Haberland } else { 3016fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, "%s", 3017fc19f381SStefan Haberland "SORRY - NO VALID SENSE AVAILABLE\n"); 3018fc19f381SStefan Haberland } 3019fc19f381SStefan Haberland } 3020fc19f381SStefan Haberland 3021445b5b49SHorst Hummel /* 30221da177e4SLinus Torvalds * Print sense data and related channel program. 30231da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 30241da177e4SLinus Torvalds */ 3025f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 30268e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 30271da177e4SLinus Torvalds { 30281da177e4SLinus Torvalds char *page; 3029445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3030445b5b49SHorst Hummel int len, sl, sct; 30311da177e4SLinus Torvalds 30321da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 30331da177e4SLinus Torvalds if (page == NULL) { 3034fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3035fc19f381SStefan Haberland "No memory to dump sense data\n"); 30361da177e4SLinus Torvalds return; 30371da177e4SLinus Torvalds } 3038445b5b49SHorst Hummel /* dump the sense data */ 30391da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 30401da177e4SLinus Torvalds " I/O status report for device %s:\n", 30412a0217d5SKay Sievers dev_name(&device->cdev->dev)); 30421da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30436cc7f168SStefan Weinhuber " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n", 30446cc7f168SStefan Weinhuber req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 3045294001a8SStefan Haberland scsw_cc(&irb->scsw), req ? req->intrc : 0); 30461da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30471da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 30482a0217d5SKay Sievers dev_name(&device->cdev->dev), 304923d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 30501da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 30511da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 30521da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30531da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 30541da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 30551da177e4SLinus Torvalds 30561da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 30571da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 30581da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 30591da177e4SLinus Torvalds } 30601da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 30611da177e4SLinus Torvalds } 30621da177e4SLinus Torvalds 30631da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 30641da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3065445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 30661da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 30671da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 30681da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 30691da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 30701da177e4SLinus Torvalds } else { 30711da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3072445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 30731da177e4SLinus Torvalds " 32 Byte: Format: %x " 30741da177e4SLinus Torvalds "Exception class %x\n", 30751da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 30761da177e4SLinus Torvalds } 30771da177e4SLinus Torvalds } else { 3078445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 30791da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 30801da177e4SLinus Torvalds } 3081445b5b49SHorst Hummel printk("%s", page); 30821da177e4SLinus Torvalds 30838e09f215SStefan Weinhuber if (req) { 30848e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3085445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3086445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3087445b5b49SHorst Hummel first = req->cpaddr; 3088445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3089445b5b49SHorst Hummel to = min(first + 6, last); 30901da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 30911da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3092445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3093445b5b49SHorst Hummel printk("%s", page); 30941da177e4SLinus Torvalds 3095445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3096445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 30971da177e4SLinus Torvalds len = 0; 3098445b5b49SHorst Hummel from = ++to; 309923d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 310023d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3101445b5b49SHorst Hummel if (from < fail - 2) { 3102445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3103445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 31041da177e4SLinus Torvalds } 3105445b5b49SHorst Hummel to = min(fail + 1, last); 3106445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 31071da177e4SLinus Torvalds 3108445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3109445b5b49SHorst Hummel from = max(from, ++to); 3110445b5b49SHorst Hummel if (from < last - 1) { 3111445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 31121da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 31131da177e4SLinus Torvalds } 3114445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 31151da177e4SLinus Torvalds if (len > 0) 3116445b5b49SHorst Hummel printk("%s", page); 31178e09f215SStefan Weinhuber } 31181da177e4SLinus Torvalds free_page((unsigned long) page); 31191da177e4SLinus Torvalds } 31201da177e4SLinus Torvalds 3121f3eb5384SStefan Weinhuber 3122f3eb5384SStefan Weinhuber /* 3123f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3124f3eb5384SStefan Weinhuber */ 3125f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3126f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3127f3eb5384SStefan Weinhuber { 3128f3eb5384SStefan Weinhuber char *page; 3129f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3130f3eb5384SStefan Weinhuber 3131f3eb5384SStefan Weinhuber struct tsb *tsb; 3132f3eb5384SStefan Weinhuber u8 *sense; 3133f3eb5384SStefan Weinhuber 3134f3eb5384SStefan Weinhuber 3135f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3136f3eb5384SStefan Weinhuber if (page == NULL) { 3137fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3138f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3139f3eb5384SStefan Weinhuber return; 3140f3eb5384SStefan Weinhuber } 3141f3eb5384SStefan Weinhuber /* dump the sense data */ 3142f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3143f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3144f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3145f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 31466cc7f168SStefan Weinhuber " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d " 3147f3eb5384SStefan Weinhuber "fcxs: 0x%02X schxs: 0x%02X\n", req, 3148f3eb5384SStefan Weinhuber scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 31496cc7f168SStefan Weinhuber scsw_cc(&irb->scsw), req->intrc, 3150f3eb5384SStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs); 3151f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3152f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3153f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3154f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3155f3eb5384SStefan Weinhuber 3156f3eb5384SStefan Weinhuber tsb = NULL; 3157f3eb5384SStefan Weinhuber sense = NULL; 3158b8fde722SStefan Haberland if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01)) 3159f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3160f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3161f3eb5384SStefan Weinhuber 3162b8fde722SStefan Haberland if (tsb) { 3163f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3164f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3165f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3166f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3167f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3168f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3169f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3170f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3171f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3172f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3173f3eb5384SStefan Weinhuber " residual %d\n", residual); 3174f3eb5384SStefan Weinhuber 3175f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3176f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3177f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3178f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3179f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3180f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3181f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3182f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3183f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3184f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3185f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3186f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3187f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3188f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3189f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3190f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3191f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3192f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3193f3eb5384SStefan Weinhuber break; 3194f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3195f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3196f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3197f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3198f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rcq: "); 3199f3eb5384SStefan Weinhuber for (sl = 0; sl < 16; sl++) { 3200f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3201f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3202f3eb5384SStefan Weinhuber tsb->tsa.ddpc.rcq[sl]); 3203f3eb5384SStefan Weinhuber } 3204f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3205f3eb5384SStefan Weinhuber } 3206f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3207f3eb5384SStefan Weinhuber break; 3208f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3209f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3210f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3211f3eb5384SStefan Weinhuber break; 3212f3eb5384SStefan Weinhuber } 3213f3eb5384SStefan Weinhuber 3214f3eb5384SStefan Weinhuber if (sense) { 3215f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3216f3eb5384SStefan Weinhuber len += sprintf(page + len, 3217f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3218f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3219f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3220f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3221f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3222f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3223f3eb5384SStefan Weinhuber } 3224f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3225f3eb5384SStefan Weinhuber } 3226f3eb5384SStefan Weinhuber 3227f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3228f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3229f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3230f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3231f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3232f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3233f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3234f3eb5384SStefan Weinhuber } else { 3235f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3236f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3237f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3238f3eb5384SStefan Weinhuber "Exception class %x\n", 3239f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3240f3eb5384SStefan Weinhuber } 3241f3eb5384SStefan Weinhuber } else { 3242f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3243f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3244f3eb5384SStefan Weinhuber } 3245f3eb5384SStefan Weinhuber } else { 3246f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3247f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3248f3eb5384SStefan Weinhuber } 3249f3eb5384SStefan Weinhuber printk("%s", page); 3250f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3251f3eb5384SStefan Weinhuber } 3252f3eb5384SStefan Weinhuber 3253f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3254f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3255f3eb5384SStefan Weinhuber { 3256f3eb5384SStefan Weinhuber if (req && scsw_is_tm(&req->irb.scsw)) 3257f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3258f3eb5384SStefan Weinhuber else 3259f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3260f3eb5384SStefan Weinhuber } 3261f3eb5384SStefan Weinhuber 3262d41dd122SStefan Haberland int dasd_eckd_pm_freeze(struct dasd_device *device) 3263d41dd122SStefan Haberland { 3264d41dd122SStefan Haberland /* 3265d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3266d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3267d41dd122SStefan Haberland * information like PAV support that might have changed 3268d41dd122SStefan Haberland */ 3269d41dd122SStefan Haberland dasd_alias_remove_device(device); 3270d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3271d41dd122SStefan Haberland 3272d41dd122SStefan Haberland return 0; 3273d41dd122SStefan Haberland } 3274d41dd122SStefan Haberland 3275d41dd122SStefan Haberland int dasd_eckd_restore_device(struct dasd_device *device) 3276d41dd122SStefan Haberland { 3277d41dd122SStefan Haberland struct dasd_eckd_private *private; 32786fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 3279d41dd122SStefan Haberland int is_known, rc; 3280d41dd122SStefan Haberland struct dasd_uid temp_uid; 3281a7602f6cSStefan Haberland unsigned long flags; 3282d41dd122SStefan Haberland 3283d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3284d41dd122SStefan Haberland 3285d41dd122SStefan Haberland /* Read Configuration Data */ 3286d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3287d41dd122SStefan Haberland if (rc) 3288d41dd122SStefan Haberland goto out_err; 3289d41dd122SStefan Haberland 3290d41dd122SStefan Haberland /* Generate device unique id and register in devmap */ 3291d41dd122SStefan Haberland rc = dasd_eckd_generate_uid(device, &private->uid); 3292d41dd122SStefan Haberland dasd_get_uid(device->cdev, &temp_uid); 3293d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3294a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 3295a7602f6cSStefan Haberland "changed\n"); 3296d41dd122SStefan Haberland if (rc) 3297d41dd122SStefan Haberland goto out_err; 3298d41dd122SStefan Haberland dasd_set_uid(device->cdev, &private->uid); 3299d41dd122SStefan Haberland 3300d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3301d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3302d41dd122SStefan Haberland if (is_known < 0) 3303d41dd122SStefan Haberland return is_known; 3304d41dd122SStefan Haberland if (!is_known) { 3305f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 3306f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 3307f4ac1d02SStefan Weinhuber } else 3308f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 3309f4ac1d02SStefan Weinhuber 3310f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 3311f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 3312d41dd122SStefan Haberland if (rc) 3313d41dd122SStefan Haberland goto out_err; 3314d41dd122SStefan Haberland 3315d41dd122SStefan Haberland /* Read Feature Codes */ 331668d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 3317d41dd122SStefan Haberland 3318d41dd122SStefan Haberland /* Read Device Characteristics */ 331968b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 33206fca97a9SStefan Haberland &temp_rdc_data, 64); 3321d41dd122SStefan Haberland if (rc) { 3322b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 3323b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 3324d41dd122SStefan Haberland goto out_err; 3325d41dd122SStefan Haberland } 3326a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 33276fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 3328a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3329d41dd122SStefan Haberland 3330d41dd122SStefan Haberland /* add device to alias management */ 3331d41dd122SStefan Haberland dasd_alias_add_device(device); 3332d41dd122SStefan Haberland 3333d41dd122SStefan Haberland return 0; 3334d41dd122SStefan Haberland 3335d41dd122SStefan Haberland out_err: 3336e6125fbaSStefan Haberland return -1; 3337d41dd122SStefan Haberland } 3338d41dd122SStefan Haberland 3339d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 3340d41dd122SStefan Haberland .name = "dasd-eckd", 3341d41dd122SStefan Haberland .owner = THIS_MODULE, 3342d41dd122SStefan Haberland .ids = dasd_eckd_ids, 3343d41dd122SStefan Haberland .probe = dasd_eckd_probe, 3344d41dd122SStefan Haberland .remove = dasd_generic_remove, 3345d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 3346d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 3347d41dd122SStefan Haberland .notify = dasd_generic_notify, 3348d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 3349d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 3350d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 3351d41dd122SStefan Haberland }; 3352f3eb5384SStefan Weinhuber 33531da177e4SLinus Torvalds /* 33541da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 33551da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 33561da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 33571da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 33581da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 33591da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 33601da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 33611da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 33621da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 33631da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 33641da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 33651da177e4SLinus Torvalds */ 33661da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 33671da177e4SLinus Torvalds .owner = THIS_MODULE, 33681da177e4SLinus Torvalds .name = "ECKD", 33691da177e4SLinus Torvalds .ebcname = "ECKD", 33701da177e4SLinus Torvalds .max_blocks = 240, 33711da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 33728e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 33731da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 33748e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 33758e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 33761da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 33771da177e4SLinus Torvalds .start_IO = dasd_start_IO, 33781da177e4SLinus Torvalds .term_IO = dasd_term_IO, 33798e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 33801da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 33811da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 33821da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 33838e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 33848e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 33858e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 33861da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 3387fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 33881da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 33891107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 3390d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 3391d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 33921da177e4SLinus Torvalds }; 33931da177e4SLinus Torvalds 33941da177e4SLinus Torvalds static int __init 33951da177e4SLinus Torvalds dasd_eckd_init(void) 33961da177e4SLinus Torvalds { 3397736e6ea0SSebastian Ott int ret; 3398736e6ea0SSebastian Ott 33991da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 3400736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 3401736e6ea0SSebastian Ott if (!ret) 3402736e6ea0SSebastian Ott wait_for_device_probe(); 3403736e6ea0SSebastian Ott 3404736e6ea0SSebastian Ott return ret; 34051da177e4SLinus Torvalds } 34061da177e4SLinus Torvalds 34071da177e4SLinus Torvalds static void __exit 34081da177e4SLinus Torvalds dasd_eckd_cleanup(void) 34091da177e4SLinus Torvalds { 34101da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 34111da177e4SLinus Torvalds } 34121da177e4SLinus Torvalds 34131da177e4SLinus Torvalds module_init(dasd_eckd_init); 34141da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 3415