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 */ 6952dedf0d9SStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 6963d052595SHorst Hummel { 6973d052595SHorst Hummel struct dasd_eckd_private *private; 6982dedf0d9SStefan Haberland struct dasd_uid *uid; 6994abb08c2SStefan Weinhuber int count; 7002dedf0d9SStefan Haberland unsigned long flags; 7013d052595SHorst Hummel 7023d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 7033d052595SHorst Hummel if (!private) 7043d052595SHorst Hummel return -ENODEV; 7054abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 7063d052595SHorst Hummel return -ENODEV; 7072dedf0d9SStefan Haberland uid = &private->uid; 7082dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7093d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7104abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7113d052595SHorst Hummel sizeof(uid->vendor) - 1); 7123d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7134abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7143d052595SHorst Hummel sizeof(uid->serial) - 1); 7153d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7164abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 717a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7184abb08c2SStefan Weinhuber if (private->sneq) { 7194abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7208e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7214abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7228e09f215SStefan Weinhuber } else { 7238e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7248e09f215SStefan Weinhuber } 7254abb08c2SStefan Weinhuber if (private->vdsneq) { 7264abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7274abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7284abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7294abb08c2SStefan Weinhuber } 7304abb08c2SStefan Weinhuber } 7312dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7323d052595SHorst Hummel return 0; 7333d052595SHorst Hummel } 7343d052595SHorst Hummel 7352dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7362dedf0d9SStefan Haberland { 7372dedf0d9SStefan Haberland struct dasd_eckd_private *private; 7382dedf0d9SStefan Haberland unsigned long flags; 7392dedf0d9SStefan Haberland 7402dedf0d9SStefan Haberland if (device->private) { 7412dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 7422dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7432dedf0d9SStefan Haberland *uid = private->uid; 7442dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7452dedf0d9SStefan Haberland return 0; 7462dedf0d9SStefan Haberland } 7472dedf0d9SStefan Haberland return -EINVAL; 7482dedf0d9SStefan Haberland } 7492dedf0d9SStefan Haberland 750763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 75117283b56SCornelia Huck void *rcd_buffer, 75217283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 75317283b56SCornelia Huck { 75417283b56SCornelia Huck struct dasd_ccw_req *cqr; 75517283b56SCornelia Huck struct ccw1 *ccw; 75617283b56SCornelia Huck 75768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count, 75868b781feSStefan Haberland device); 75917283b56SCornelia Huck 76017283b56SCornelia Huck if (IS_ERR(cqr)) { 761fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 76217283b56SCornelia Huck "Could not allocate RCD request"); 76317283b56SCornelia Huck return cqr; 76417283b56SCornelia Huck } 76517283b56SCornelia Huck 76617283b56SCornelia Huck ccw = cqr->cpaddr; 76717283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 76817283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 76917283b56SCornelia Huck ccw->count = ciw->count; 77017283b56SCornelia Huck 7718e09f215SStefan Weinhuber cqr->startdev = device; 7728e09f215SStefan Weinhuber cqr->memdev = device; 7738e09f215SStefan Weinhuber cqr->block = NULL; 77417283b56SCornelia Huck cqr->expires = 10*HZ; 77517283b56SCornelia Huck cqr->lpm = lpm; 776eb6e199bSStefan Weinhuber cqr->retries = 256; 77717283b56SCornelia Huck cqr->buildclk = get_clock(); 77817283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 77917283b56SCornelia Huck return cqr; 78017283b56SCornelia Huck } 78117283b56SCornelia Huck 78217283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 78317283b56SCornelia Huck void **rcd_buffer, 78417283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 78517283b56SCornelia Huck { 78617283b56SCornelia Huck struct ciw *ciw; 78717283b56SCornelia Huck char *rcd_buf = NULL; 78817283b56SCornelia Huck int ret; 78917283b56SCornelia Huck struct dasd_ccw_req *cqr; 79017283b56SCornelia Huck 79117283b56SCornelia Huck /* 79217283b56SCornelia Huck * scan for RCD command in extended SenseID data 79317283b56SCornelia Huck */ 79417283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 79517283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 79617283b56SCornelia Huck ret = -EOPNOTSUPP; 79717283b56SCornelia Huck goto out_error; 79817283b56SCornelia Huck } 79917283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 80017283b56SCornelia Huck if (!rcd_buf) { 80117283b56SCornelia Huck ret = -ENOMEM; 80217283b56SCornelia Huck goto out_error; 80317283b56SCornelia Huck } 8044abb08c2SStefan Weinhuber 8054abb08c2SStefan Weinhuber /* 8064abb08c2SStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 8074abb08c2SStefan Weinhuber * support for virtual device SNEQ 8084abb08c2SStefan Weinhuber */ 8094abb08c2SStefan Weinhuber rcd_buf[0] = 0xE5; 8104abb08c2SStefan Weinhuber rcd_buf[1] = 0xF1; 8114abb08c2SStefan Weinhuber rcd_buf[2] = 0x4B; 8124abb08c2SStefan Weinhuber rcd_buf[3] = 0xF0; 81317283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 81417283b56SCornelia Huck if (IS_ERR(cqr)) { 81517283b56SCornelia Huck ret = PTR_ERR(cqr); 81617283b56SCornelia Huck goto out_error; 81717283b56SCornelia Huck } 81817283b56SCornelia Huck ret = dasd_sleep_on(cqr); 81917283b56SCornelia Huck /* 82017283b56SCornelia Huck * on success we update the user input parms 82117283b56SCornelia Huck */ 8228e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 82317283b56SCornelia Huck if (ret) 82417283b56SCornelia Huck goto out_error; 82517283b56SCornelia Huck 82617283b56SCornelia Huck *rcd_buffer_size = ciw->count; 82717283b56SCornelia Huck *rcd_buffer = rcd_buf; 82817283b56SCornelia Huck return 0; 82917283b56SCornelia Huck out_error: 83017283b56SCornelia Huck kfree(rcd_buf); 83117283b56SCornelia Huck *rcd_buffer = NULL; 83217283b56SCornelia Huck *rcd_buffer_size = 0; 83317283b56SCornelia Huck return ret; 83417283b56SCornelia Huck } 83517283b56SCornelia Huck 8364abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 8374abb08c2SStefan Weinhuber { 8384abb08c2SStefan Weinhuber 8394abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 8404abb08c2SStefan Weinhuber int i, count; 8414abb08c2SStefan Weinhuber 8424abb08c2SStefan Weinhuber private->ned = NULL; 8434abb08c2SStefan Weinhuber private->sneq = NULL; 8444abb08c2SStefan Weinhuber private->vdsneq = NULL; 8454abb08c2SStefan Weinhuber private->gneq = NULL; 8464abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 8474abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 8484abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8494abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 8504abb08c2SStefan Weinhuber private->sneq = sneq; 8514abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 8524abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 8534abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 8544abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 8554abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 8564abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 8574abb08c2SStefan Weinhuber sneq++; 8584abb08c2SStefan Weinhuber } 8594abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 8604abb08c2SStefan Weinhuber private->ned = NULL; 8614abb08c2SStefan Weinhuber private->sneq = NULL; 8624abb08c2SStefan Weinhuber private->vdsneq = NULL; 8634abb08c2SStefan Weinhuber private->gneq = NULL; 8644abb08c2SStefan Weinhuber return -EINVAL; 8654abb08c2SStefan Weinhuber } 8664abb08c2SStefan Weinhuber return 0; 8674abb08c2SStefan Weinhuber 8684abb08c2SStefan Weinhuber }; 8694abb08c2SStefan Weinhuber 8704abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 8714abb08c2SStefan Weinhuber { 8724abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 8734abb08c2SStefan Weinhuber int i, count, found; 8744abb08c2SStefan Weinhuber 8754abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 8764abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 8774abb08c2SStefan Weinhuber found = 0; 8784abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8794abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 8804abb08c2SStefan Weinhuber found = 1; 8814abb08c2SStefan Weinhuber break; 8824abb08c2SStefan Weinhuber } 8834abb08c2SStefan Weinhuber gneq++; 8844abb08c2SStefan Weinhuber } 8854abb08c2SStefan Weinhuber if (found) 8864abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 8874abb08c2SStefan Weinhuber else 8884abb08c2SStefan Weinhuber return 0; 8894abb08c2SStefan Weinhuber } 8904abb08c2SStefan Weinhuber 8914abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 8921da177e4SLinus Torvalds { 8931da177e4SLinus Torvalds void *conf_data; 8941da177e4SLinus Torvalds int conf_len, conf_data_saved; 8951da177e4SLinus Torvalds int rc; 8961da177e4SLinus Torvalds __u8 lpm; 8971da177e4SLinus Torvalds struct dasd_eckd_private *private; 8981da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 8991da177e4SLinus Torvalds 9001da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9011da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 9021da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 9031da177e4SLinus Torvalds lpm = 0x80; 9041da177e4SLinus Torvalds conf_data_saved = 0; 9051da177e4SLinus Torvalds /* get configuration data per operational path */ 9061da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 9071da177e4SLinus Torvalds if (lpm & path_data->opm){ 90817283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 9091da177e4SLinus Torvalds &conf_len, lpm); 9101da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 911b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 9121da177e4SLinus Torvalds "Read configuration data returned " 913b8ed5dd5SStefan Haberland "error %d", rc); 9141da177e4SLinus Torvalds return rc; 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds if (conf_data == NULL) { 917b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 918b8ed5dd5SStefan Haberland "No configuration data " 919b8ed5dd5SStefan Haberland "retrieved"); 920d133a960SGabriel Craciunescu continue; /* no error */ 9211da177e4SLinus Torvalds } 9221da177e4SLinus Torvalds /* save first valid configuration data */ 9231da177e4SLinus Torvalds if (!conf_data_saved) { 9244abb08c2SStefan Weinhuber kfree(private->conf_data); 9254abb08c2SStefan Weinhuber private->conf_data = conf_data; 9264abb08c2SStefan Weinhuber private->conf_len = conf_len; 9274abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 9284abb08c2SStefan Weinhuber private->conf_data = NULL; 9294abb08c2SStefan Weinhuber private->conf_len = 0; 9304abb08c2SStefan Weinhuber kfree(conf_data); 9314abb08c2SStefan Weinhuber continue; 9324abb08c2SStefan Weinhuber } 9331da177e4SLinus Torvalds conf_data_saved++; 9341da177e4SLinus Torvalds } 9354abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 9361da177e4SLinus Torvalds case 0x02: 9371da177e4SLinus Torvalds path_data->npm |= lpm; 9381da177e4SLinus Torvalds break; 9391da177e4SLinus Torvalds case 0x03: 9401da177e4SLinus Torvalds path_data->ppm |= lpm; 9411da177e4SLinus Torvalds break; 9421da177e4SLinus Torvalds } 9434abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 9441da177e4SLinus Torvalds kfree(conf_data); 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds } 9471da177e4SLinus Torvalds return 0; 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds 9508e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 9518e09f215SStefan Weinhuber { 9528e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 9538e09f215SStefan Weinhuber struct dasd_rssd_features *features; 9548e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 9558e09f215SStefan Weinhuber struct ccw1 *ccw; 9568e09f215SStefan Weinhuber int rc; 9578e09f215SStefan Weinhuber struct dasd_eckd_private *private; 9588e09f215SStefan Weinhuber 9598e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 96068d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 96168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 9628e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 9638e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 9648e09f215SStefan Weinhuber device); 9658e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 966b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 967b8ed5dd5SStefan Haberland "allocate initialization request"); 9688e09f215SStefan Weinhuber return PTR_ERR(cqr); 9698e09f215SStefan Weinhuber } 9708e09f215SStefan Weinhuber cqr->startdev = device; 9718e09f215SStefan Weinhuber cqr->memdev = device; 9728e09f215SStefan Weinhuber cqr->block = NULL; 973eb6e199bSStefan Weinhuber cqr->retries = 256; 9748e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 9758e09f215SStefan Weinhuber 9768e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 9778e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 9788e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 9798e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 9808e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 9818e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 9828e09f215SStefan Weinhuber 9838e09f215SStefan Weinhuber ccw = cqr->cpaddr; 9848e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 9858e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 9868e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 9878e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 9888e09f215SStefan Weinhuber 9898e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 9908e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 9918e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 9928e09f215SStefan Weinhuber 9938e09f215SStefan Weinhuber ccw++; 9948e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 9958e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 9968e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 9978e09f215SStefan Weinhuber 9988e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 9998e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 10008e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 10018e09f215SStefan Weinhuber if (rc == 0) { 10028e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 10038e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 10048e09f215SStefan Weinhuber memcpy(&private->features, features, 10058e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 100668d1e5f0SStefan Weinhuber } else 100768d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 100868d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 10098e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 10108e09f215SStefan Weinhuber return rc; 10118e09f215SStefan Weinhuber } 10128e09f215SStefan Weinhuber 10138e09f215SStefan Weinhuber 10143d052595SHorst Hummel /* 101540545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 101640545573SHorst Hummel */ 1017f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1018f3eb5384SStefan Weinhuber int enable_pav) 101940545573SHorst Hummel { 102040545573SHorst Hummel struct dasd_ccw_req *cqr; 102140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 102240545573SHorst Hummel struct ccw1 *ccw; 102340545573SHorst Hummel 102468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 102540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 102640545573SHorst Hummel device); 102740545573SHorst Hummel 102840545573SHorst Hummel if (IS_ERR(cqr)) { 1029fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 103040545573SHorst Hummel "Could not allocate PSF-SSC request"); 103140545573SHorst Hummel return cqr; 103240545573SHorst Hummel } 103340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 103440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1035626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1036f3eb5384SStefan Weinhuber if (enable_pav) { 1037626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 10388e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1039f3eb5384SStefan Weinhuber } 104040545573SHorst Hummel ccw = cqr->cpaddr; 104140545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 104240545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 104340545573SHorst Hummel ccw->count = 66; 104440545573SHorst Hummel 10458e09f215SStefan Weinhuber cqr->startdev = device; 10468e09f215SStefan Weinhuber cqr->memdev = device; 10478e09f215SStefan Weinhuber cqr->block = NULL; 1048eb6e199bSStefan Weinhuber cqr->retries = 256; 104940545573SHorst Hummel cqr->expires = 10*HZ; 105040545573SHorst Hummel cqr->buildclk = get_clock(); 105140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 105240545573SHorst Hummel return cqr; 105340545573SHorst Hummel } 105440545573SHorst Hummel 105540545573SHorst Hummel /* 105640545573SHorst Hummel * Perform Subsystem Function. 105740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 105840545573SHorst Hummel * call might change behaviour of DASD devices. 105940545573SHorst Hummel */ 106040545573SHorst Hummel static int 1061f3eb5384SStefan Weinhuber dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 106240545573SHorst Hummel { 106340545573SHorst Hummel struct dasd_ccw_req *cqr; 106440545573SHorst Hummel int rc; 106540545573SHorst Hummel 1066f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 106740545573SHorst Hummel if (IS_ERR(cqr)) 106840545573SHorst Hummel return PTR_ERR(cqr); 106940545573SHorst Hummel 107040545573SHorst Hummel rc = dasd_sleep_on(cqr); 107140545573SHorst Hummel if (!rc) 107240545573SHorst Hummel /* trigger CIO to reprobe devices */ 107340545573SHorst Hummel css_schedule_reprobe(); 10748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 107540545573SHorst Hummel return rc; 107640545573SHorst Hummel } 107740545573SHorst Hummel 107840545573SHorst Hummel /* 107940545573SHorst Hummel * Valide storage server of current device. 108040545573SHorst Hummel */ 1081f4ac1d02SStefan Weinhuber static void dasd_eckd_validate_server(struct dasd_device *device) 108240545573SHorst Hummel { 108340545573SHorst Hummel int rc; 10848e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1085f3eb5384SStefan Weinhuber int enable_pav; 108640545573SHorst Hummel 108740545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1088f3eb5384SStefan Weinhuber enable_pav = 0; 1089f3eb5384SStefan Weinhuber else 1090f3eb5384SStefan Weinhuber enable_pav = 1; 1091f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 1092eb6e199bSStefan Weinhuber 109340545573SHorst Hummel /* may be requested feature is not available on server, 109440545573SHorst Hummel * therefore just report error and go ahead */ 10958e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1096b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1097b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 109840545573SHorst Hummel } 109940545573SHorst Hummel 110040545573SHorst Hummel /* 11013d052595SHorst Hummel * Check device characteristics. 11023d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 11033d052595SHorst Hummel */ 11041da177e4SLinus Torvalds static int 11051da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 11061da177e4SLinus Torvalds { 11071da177e4SLinus Torvalds struct dasd_eckd_private *private; 11088e09f215SStefan Weinhuber struct dasd_block *block; 11092dedf0d9SStefan Haberland struct dasd_uid temp_uid; 11108e09f215SStefan Weinhuber int is_known, rc; 111133b62a30SStefan Weinhuber int readonly; 11121da177e4SLinus Torvalds 1113454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1114454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1115454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1116454e1fa1SPeter Oberparleiter return -EIO; 1117454e1fa1SPeter Oberparleiter } 1118454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1119454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1120454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1121454e1fa1SPeter Oberparleiter } 11221da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 112392636b15SSebastian Ott if (!private) { 112492636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 112592636b15SSebastian Ott if (!private) { 1126fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1127fc19f381SStefan Haberland "Allocating memory for private DASD data " 1128fc19f381SStefan Haberland "failed\n"); 11291da177e4SLinus Torvalds return -ENOMEM; 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds device->private = (void *) private; 113292636b15SSebastian Ott } else { 113392636b15SSebastian Ott memset(private, 0, sizeof(*private)); 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 11361da177e4SLinus Torvalds private->init_cqr_status = -1; 11371da177e4SLinus Torvalds /* Set default cache operations. */ 11381da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 11391da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 11401da177e4SLinus Torvalds 114140545573SHorst Hummel /* Read Configuration Data */ 114240545573SHorst Hummel rc = dasd_eckd_read_conf(device); 114340545573SHorst Hummel if (rc) 11448e09f215SStefan Weinhuber goto out_err1; 114540545573SHorst Hummel 11462dedf0d9SStefan Haberland /* Generate device unique id */ 11472dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 114840545573SHorst Hummel if (rc) 11498e09f215SStefan Weinhuber goto out_err1; 11508e09f215SStefan Weinhuber 11512dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 11522dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 11538e09f215SStefan Weinhuber block = dasd_alloc_block(); 11548e09f215SStefan Weinhuber if (IS_ERR(block)) { 1155b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1156b8ed5dd5SStefan Haberland "could not allocate dasd " 1157b8ed5dd5SStefan Haberland "block structure"); 11588e09f215SStefan Weinhuber rc = PTR_ERR(block); 11598e09f215SStefan Weinhuber goto out_err1; 11608e09f215SStefan Weinhuber } 11618e09f215SStefan Weinhuber device->block = block; 11628e09f215SStefan Weinhuber block->base = device; 11638e09f215SStefan Weinhuber } 11648e09f215SStefan Weinhuber 11658e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 11668e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 11678e09f215SStefan Weinhuber if (is_known < 0) { 11688e09f215SStefan Weinhuber rc = is_known; 11698e09f215SStefan Weinhuber goto out_err2; 11708e09f215SStefan Weinhuber } 1171f4ac1d02SStefan Weinhuber /* 1172f4ac1d02SStefan Weinhuber * dasd_eckd_vaildate_server is done on the first device that 1173f4ac1d02SStefan Weinhuber * is found for an LCU. All later other devices have to wait 1174f4ac1d02SStefan Weinhuber * for it, so they will read the correct feature codes. 1175f4ac1d02SStefan Weinhuber */ 11768e09f215SStefan Weinhuber if (!is_known) { 1177f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1178f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 1179f4ac1d02SStefan Weinhuber } else 1180f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 1181f4ac1d02SStefan Weinhuber 1182f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1183f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 118440545573SHorst Hummel if (rc) 11858e09f215SStefan Weinhuber goto out_err3; 11868e09f215SStefan Weinhuber 11878e09f215SStefan Weinhuber /* Read Feature Codes */ 118868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 118940545573SHorst Hummel 11901da177e4SLinus Torvalds /* Read Device Characteristics */ 119168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 119268b781feSStefan Haberland &private->rdc_data, 64); 11938e09f215SStefan Weinhuber if (rc) { 1194b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1195b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 11968e09f215SStefan Weinhuber goto out_err3; 11978e09f215SStefan Weinhuber } 1198b44b0ab3SStefan Weinhuber /* find the vaild cylinder size */ 1199b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1200b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1201b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1202b44b0ab3SStefan Weinhuber else 1203b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1204b44b0ab3SStefan Weinhuber 120533b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 120633b62a30SStefan Weinhuber if (readonly) 120733b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 120833b62a30SStefan Weinhuber 1209fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 121033b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 12111da177e4SLinus Torvalds private->rdc_data.dev_type, 12121da177e4SLinus Torvalds private->rdc_data.dev_model, 12131da177e4SLinus Torvalds private->rdc_data.cu_type, 12141da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1215b44b0ab3SStefan Weinhuber private->real_cyl, 12161da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 121733b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 121833b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 12198e09f215SStefan Weinhuber return 0; 12208e09f215SStefan Weinhuber 12218e09f215SStefan Weinhuber out_err3: 12228e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 12238e09f215SStefan Weinhuber out_err2: 12248e09f215SStefan Weinhuber dasd_free_block(device->block); 12258e09f215SStefan Weinhuber device->block = NULL; 12268e09f215SStefan Weinhuber out_err1: 12274abb08c2SStefan Weinhuber kfree(private->conf_data); 12288e09f215SStefan Weinhuber kfree(device->private); 12298e09f215SStefan Weinhuber device->private = NULL; 12303d052595SHorst Hummel return rc; 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds 12338e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 12348e09f215SStefan Weinhuber { 12354abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 12364abb08c2SStefan Weinhuber 12374abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 12388e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 12394abb08c2SStefan Weinhuber private->ned = NULL; 12404abb08c2SStefan Weinhuber private->sneq = NULL; 12414abb08c2SStefan Weinhuber private->vdsneq = NULL; 12424abb08c2SStefan Weinhuber private->gneq = NULL; 12434abb08c2SStefan Weinhuber private->conf_len = 0; 12444abb08c2SStefan Weinhuber kfree(private->conf_data); 12454abb08c2SStefan Weinhuber private->conf_data = NULL; 12468e09f215SStefan Weinhuber } 12478e09f215SStefan Weinhuber 12481da177e4SLinus Torvalds static struct dasd_ccw_req * 12491da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 12501da177e4SLinus Torvalds { 12511da177e4SLinus Torvalds struct dasd_eckd_private *private; 12521da177e4SLinus Torvalds struct eckd_count *count_data; 12531da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 12541da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 12551da177e4SLinus Torvalds struct ccw1 *ccw; 12561da177e4SLinus Torvalds int cplength, datasize; 12571da177e4SLinus Torvalds int i; 12581da177e4SLinus Torvalds 12591da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds cplength = 8; 12621da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 126368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 12641da177e4SLinus Torvalds if (IS_ERR(cqr)) 12651da177e4SLinus Torvalds return cqr; 12661da177e4SLinus Torvalds ccw = cqr->cpaddr; 12671da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 12681da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 12691da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 12701da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 12711da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 12721da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12731da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 12741da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds count_data = private->count_area; 12771da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12781da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12791da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 12801da177e4SLinus Torvalds ccw->flags = 0; 12811da177e4SLinus Torvalds ccw->count = 8; 12821da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 12831da177e4SLinus Torvalds ccw++; 12841da177e4SLinus Torvalds count_data++; 12851da177e4SLinus Torvalds } 12861da177e4SLinus Torvalds 12871da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 12881da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12891da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 12901da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 12911da177e4SLinus Torvalds /* Read count ccw. */ 12921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12931da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 12941da177e4SLinus Torvalds ccw->flags = 0; 12951da177e4SLinus Torvalds ccw->count = 8; 12961da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 12971da177e4SLinus Torvalds 12988e09f215SStefan Weinhuber cqr->block = NULL; 12998e09f215SStefan Weinhuber cqr->startdev = device; 13008e09f215SStefan Weinhuber cqr->memdev = device; 1301eb6e199bSStefan Weinhuber cqr->retries = 255; 13021da177e4SLinus Torvalds cqr->buildclk = get_clock(); 13031da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 13041da177e4SLinus Torvalds return cqr; 13051da177e4SLinus Torvalds } 13061da177e4SLinus Torvalds 1307eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1308eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1309eb6e199bSStefan Weinhuber { 1310eb6e199bSStefan Weinhuber char *sense; 1311eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1312eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1313eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1314eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1315eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1316eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1317eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1318eb6e199bSStefan Weinhuber else 1319eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1320eb6e199bSStefan Weinhuber } else 1321eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1322eb6e199bSStefan Weinhuber } 1323eb6e199bSStefan Weinhuber 13241da177e4SLinus Torvalds /* 13251da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 13261da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 13271da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 13281da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 13291da177e4SLinus Torvalds * for deletion in the meantime). 13301da177e4SLinus Torvalds */ 1331eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1332eb6e199bSStefan Weinhuber void *data) 13331da177e4SLinus Torvalds { 13341da177e4SLinus Torvalds struct dasd_eckd_private *private; 13351da177e4SLinus Torvalds struct dasd_device *device; 13361da177e4SLinus Torvalds 13378e09f215SStefan Weinhuber device = init_cqr->startdev; 13381da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1339eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 13401da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 13411da177e4SLinus Torvalds dasd_kick_device(device); 13421da177e4SLinus Torvalds } 13431da177e4SLinus Torvalds 1344eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 13451da177e4SLinus Torvalds { 13461da177e4SLinus Torvalds struct dasd_eckd_private *private; 13471da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 13481da177e4SLinus Torvalds 13498e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 13508e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 13511da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 13521da177e4SLinus Torvalds return PTR_ERR(init_cqr); 13531da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 13541da177e4SLinus Torvalds init_cqr->callback_data = NULL; 13551da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1356eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1357eb6e199bSStefan Weinhuber * devices as special case 1358eb6e199bSStefan Weinhuber */ 1359eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1360eb6e199bSStefan Weinhuber init_cqr->retries = 0; 13611da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 13621da177e4SLinus Torvalds return -EAGAIN; 13631da177e4SLinus Torvalds } 13641da177e4SLinus Torvalds 1365eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 13661da177e4SLinus Torvalds { 13678e09f215SStefan Weinhuber struct dasd_device *device; 13681da177e4SLinus Torvalds struct dasd_eckd_private *private; 13691da177e4SLinus Torvalds struct eckd_count *count_area; 13701da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 13711da177e4SLinus Torvalds int status, i; 1372eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 13731da177e4SLinus Torvalds 13748e09f215SStefan Weinhuber device = block->base; 13751da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 13761da177e4SLinus Torvalds status = private->init_cqr_status; 13771da177e4SLinus Torvalds private->init_cqr_status = -1; 1378eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1379eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1380eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1381eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1382eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1383eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1384eb6e199bSStefan Weinhuber } 1385eb6e199bSStefan Weinhuber 1386eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1387eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 13881da177e4SLinus Torvalds return -EMEDIUMTYPE; 1389eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1390eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1391eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1392eb6e199bSStefan Weinhuber "of an I/O error\n"); 1393eb6e199bSStefan Weinhuber return -EIO; 13941da177e4SLinus Torvalds } 13951da177e4SLinus Torvalds 13961da177e4SLinus Torvalds private->uses_cdl = 1; 13971da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 13981da177e4SLinus Torvalds count_area = NULL; 13991da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 14001da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 14011da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 14021da177e4SLinus Torvalds private->uses_cdl = 0; 14031da177e4SLinus Torvalds break; 14041da177e4SLinus Torvalds } 14051da177e4SLinus Torvalds } 14061da177e4SLinus Torvalds if (i == 3) 14071da177e4SLinus Torvalds count_area = &private->count_area[4]; 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds if (private->uses_cdl == 0) { 14101da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 14111da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 14121da177e4SLinus Torvalds (private->count_area[i].dl != 14131da177e4SLinus Torvalds private->count_area[0].dl)) 14141da177e4SLinus Torvalds break; 14151da177e4SLinus Torvalds } 14161da177e4SLinus Torvalds if (i == 5) 14171da177e4SLinus Torvalds count_area = &private->count_area[0]; 14181da177e4SLinus Torvalds } else { 14191da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1420fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1421fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 14221da177e4SLinus Torvalds } 14231da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 14241da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 14251da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 14268e09f215SStefan Weinhuber block->bp_block = count_area->dl; 14271da177e4SLinus Torvalds } 14288e09f215SStefan Weinhuber if (block->bp_block == 0) { 1429fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1430fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 14311da177e4SLinus Torvalds return -EMEDIUMTYPE; 14321da177e4SLinus Torvalds } 14338e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 14348e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 14358e09f215SStefan Weinhuber block->s2b_shift++; 14361da177e4SLinus Torvalds 14378e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1438b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 14391da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 14401da177e4SLinus Torvalds blk_per_trk); 14411da177e4SLinus Torvalds 1442fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1443fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1444fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1445b44b0ab3SStefan Weinhuber ((private->real_cyl * 14461da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 14478e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 14488e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 14491da177e4SLinus Torvalds private->uses_cdl ? 14501da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds return 0; 14531da177e4SLinus Torvalds } 14541da177e4SLinus Torvalds 14558e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 14561da177e4SLinus Torvalds { 14571da177e4SLinus Torvalds struct dasd_eckd_private *private; 14581da177e4SLinus Torvalds 14598e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 14601da177e4SLinus Torvalds if (private->init_cqr_status < 0) 14618e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 14621da177e4SLinus Torvalds else 14638e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 14641da177e4SLinus Torvalds } 14651da177e4SLinus Torvalds 14668e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 14678e09f215SStefan Weinhuber { 14688e09f215SStefan Weinhuber return dasd_alias_add_device(device); 14698e09f215SStefan Weinhuber }; 14708e09f215SStefan Weinhuber 14718e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 14728e09f215SStefan Weinhuber { 1473501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 14748e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 14758e09f215SStefan Weinhuber }; 14768e09f215SStefan Weinhuber 14771da177e4SLinus Torvalds static int 14788e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 14791da177e4SLinus Torvalds { 14801da177e4SLinus Torvalds struct dasd_eckd_private *private; 14811da177e4SLinus Torvalds 14828e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 14838e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 14841da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 14858e09f215SStefan Weinhuber 0, block->bp_block); 14861da177e4SLinus Torvalds } 14871da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 14881da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 14891da177e4SLinus Torvalds return 0; 14901da177e4SLinus Torvalds } 14911da177e4SLinus Torvalds 14921da177e4SLinus Torvalds static struct dasd_ccw_req * 14931da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 14941da177e4SLinus Torvalds struct format_data_t * fdata) 14951da177e4SLinus Torvalds { 14961da177e4SLinus Torvalds struct dasd_eckd_private *private; 14971da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 14981da177e4SLinus Torvalds struct eckd_count *ect; 14991da177e4SLinus Torvalds struct ccw1 *ccw; 15001da177e4SLinus Torvalds void *data; 1501b44b0ab3SStefan Weinhuber int rpt; 1502b44b0ab3SStefan Weinhuber struct ch_t address; 15031da177e4SLinus Torvalds int cplength, datasize; 15041da177e4SLinus Torvalds int i; 1505f9a28f7bSJean-Baptiste Joret int intensity = 0; 1506f9a28f7bSJean-Baptiste Joret int r0_perm; 15071da177e4SLinus Torvalds 15081da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 15091da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1510b44b0ab3SStefan Weinhuber set_ch_t(&address, 1511b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1512b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 15131da177e4SLinus Torvalds 15141da177e4SLinus Torvalds /* Sanity checks. */ 15151da177e4SLinus Torvalds if (fdata->start_unit >= 1516b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1517fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 1518fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 15191da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15201da177e4SLinus Torvalds } 15211da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1522fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 1523fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 15241da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15251da177e4SLinus Torvalds } 15261da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 1527fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1528fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 15291da177e4SLinus Torvalds fdata->blksize); 15301da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15311da177e4SLinus Torvalds } 15321da177e4SLinus Torvalds 15331da177e4SLinus Torvalds /* 15341da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 15351da177e4SLinus Torvalds * Bit 0: write record zero 15361da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 15371da177e4SLinus Torvalds * Bit 2: invalidate tracks 15381da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1539f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 15401da177e4SLinus Torvalds * Only some bit combinations do make sense. 15411da177e4SLinus Torvalds */ 1542f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1543f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1544f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1545f9a28f7bSJean-Baptiste Joret } else { 1546f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1547f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1548f9a28f7bSJean-Baptiste Joret } 1549f9a28f7bSJean-Baptiste Joret switch (intensity) { 15501da177e4SLinus Torvalds case 0x00: /* Normal format */ 15511da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 15521da177e4SLinus Torvalds cplength = 2 + rpt; 15531da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15541da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15551da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 15561da177e4SLinus Torvalds break; 15571da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 15581da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 15591da177e4SLinus Torvalds cplength = 3 + rpt; 15601da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15611da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15621da177e4SLinus Torvalds sizeof(struct eckd_count) + 15631da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 15641da177e4SLinus Torvalds break; 15651da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 15661da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 15671da177e4SLinus Torvalds cplength = 3; 15681da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15691da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15701da177e4SLinus Torvalds sizeof(struct eckd_count); 15711da177e4SLinus Torvalds break; 15721da177e4SLinus Torvalds default: 1573fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 1574fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 15751da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15761da177e4SLinus Torvalds } 15771da177e4SLinus Torvalds /* Allocate the format ccw request. */ 157868b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 15791da177e4SLinus Torvalds if (IS_ERR(fcp)) 15801da177e4SLinus Torvalds return fcp; 15811da177e4SLinus Torvalds 15821da177e4SLinus Torvalds data = fcp->data; 15831da177e4SLinus Torvalds ccw = fcp->cpaddr; 15841da177e4SLinus Torvalds 1585f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 15861da177e4SLinus Torvalds case 0x00: /* Normal format. */ 15871da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 15881da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 15891da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1590f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1591f9a28f7bSJean-Baptiste Joret if (r0_perm) 1592f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 15931da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 15941da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15951da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 15961da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 15971da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 15981da177e4SLinus Torvalds fdata->blksize); 15991da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16001da177e4SLinus Torvalds break; 16011da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 16021da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 16031da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 16041da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 16051da177e4SLinus Torvalds device); 16061da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 16071da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16081da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16091da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 16101da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 16118e09f215SStefan Weinhuber device->block->bp_block); 16121da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16131da177e4SLinus Torvalds break; 16141da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 16151da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 16161da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 16171da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 16181da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 16191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16201da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16211da177e4SLinus Torvalds fdata->start_unit, 0, 1, 16221da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 16231da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16241da177e4SLinus Torvalds break; 16251da177e4SLinus Torvalds } 1626f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 16271da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16281da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1629b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1630b44b0ab3SStefan Weinhuber ect->head = address.head; 16311da177e4SLinus Torvalds ect->record = 0; 16321da177e4SLinus Torvalds ect->kl = 0; 16331da177e4SLinus Torvalds ect->dl = 8; 16341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16351da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 16361da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16371da177e4SLinus Torvalds ccw->count = 8; 16381da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16391da177e4SLinus Torvalds ccw++; 16401da177e4SLinus Torvalds } 1641f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 16421da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16431da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1644b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1645b44b0ab3SStefan Weinhuber ect->head = address.head; 16461da177e4SLinus Torvalds ect->record = 1; 16471da177e4SLinus Torvalds ect->kl = 0; 16481da177e4SLinus Torvalds ect->dl = 0; 16491da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16501da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 16511da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16521da177e4SLinus Torvalds ccw->count = 8; 16531da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16541da177e4SLinus Torvalds } else { /* write remaining records */ 16551da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 16561da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16571da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1658b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1659b44b0ab3SStefan Weinhuber ect->head = address.head; 16601da177e4SLinus Torvalds ect->record = i + 1; 16611da177e4SLinus Torvalds ect->kl = 0; 16621da177e4SLinus Torvalds ect->dl = fdata->blksize; 16631da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1664f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 16651da177e4SLinus Torvalds fdata->start_unit == 0) { 16661da177e4SLinus Torvalds if (i < 3) { 16671da177e4SLinus Torvalds ect->kl = 4; 16681da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 16691da177e4SLinus Torvalds } 16701da177e4SLinus Torvalds } 1671f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 16721da177e4SLinus Torvalds fdata->start_unit == 1) { 16731da177e4SLinus Torvalds ect->kl = 44; 16741da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 16751da177e4SLinus Torvalds } 16761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16771da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 16781da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16791da177e4SLinus Torvalds ccw->count = 8; 16801da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16811da177e4SLinus Torvalds ccw++; 16821da177e4SLinus Torvalds } 16831da177e4SLinus Torvalds } 16848e09f215SStefan Weinhuber fcp->startdev = device; 16858e09f215SStefan Weinhuber fcp->memdev = device; 1686eb6e199bSStefan Weinhuber fcp->retries = 256; 16871da177e4SLinus Torvalds fcp->buildclk = get_clock(); 16881da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 16891da177e4SLinus Torvalds return fcp; 16901da177e4SLinus Torvalds } 16911da177e4SLinus Torvalds 16928e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 16931da177e4SLinus Torvalds { 16948e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 16958e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 16968e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 16978e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 16981da177e4SLinus Torvalds } 16998e09f215SStefan Weinhuber }; 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds static dasd_erp_fn_t 17021da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 17031da177e4SLinus Torvalds { 17048e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 17051da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 17061da177e4SLinus Torvalds 17071da177e4SLinus Torvalds switch (cdev->id.cu_type) { 17081da177e4SLinus Torvalds case 0x3990: 17091da177e4SLinus Torvalds case 0x2105: 17101da177e4SLinus Torvalds case 0x2107: 17111da177e4SLinus Torvalds case 0x1750: 17121da177e4SLinus Torvalds return dasd_3990_erp_action; 17131da177e4SLinus Torvalds case 0x9343: 17141da177e4SLinus Torvalds case 0x3880: 17151da177e4SLinus Torvalds default: 17161da177e4SLinus Torvalds return dasd_default_erp_action; 17171da177e4SLinus Torvalds } 17181da177e4SLinus Torvalds } 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds static dasd_erp_fn_t 17211da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 17221da177e4SLinus Torvalds { 17231da177e4SLinus Torvalds return dasd_default_erp_postaction; 17241da177e4SLinus Torvalds } 17251da177e4SLinus Torvalds 17268e09f215SStefan Weinhuber 17278e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 17288e09f215SStefan Weinhuber struct irb *irb) 17298e09f215SStefan Weinhuber { 17308e09f215SStefan Weinhuber char mask; 1731f3eb5384SStefan Weinhuber char *sense = NULL; 1732501183f2SStefan Haberland struct dasd_eckd_private *private; 17338e09f215SStefan Weinhuber 1734501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 17358e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 17368e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1737f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 1738501183f2SStefan Haberland /* for alias only and not in offline processing*/ 1739501183f2SStefan Haberland if (!device->block && private->lcu && 1740501183f2SStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags)) { 1741501183f2SStefan Haberland /* 1742501183f2SStefan Haberland * the state change could be caused by an alias 1743501183f2SStefan Haberland * reassignment remove device from alias handling 1744501183f2SStefan Haberland * to prevent new requests from being scheduled on 1745501183f2SStefan Haberland * the wrong alias device 1746501183f2SStefan Haberland */ 1747501183f2SStefan Haberland dasd_alias_remove_device(device); 1748501183f2SStefan Haberland 1749501183f2SStefan Haberland /* schedule worker to reload device */ 1750501183f2SStefan Haberland dasd_reload_device(device); 1751501183f2SStefan Haberland } 1752501183f2SStefan Haberland 17538e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 17548e09f215SStefan Weinhuber return; 17558e09f215SStefan Weinhuber } 17568e09f215SStefan Weinhuber 17578e09f215SStefan Weinhuber /* summary unit check */ 1758f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 175923d805b6SPeter Oberparleiter (irb->ecw[7] == 0x0D)) { 17608e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 17618e09f215SStefan Weinhuber return; 17628e09f215SStefan Weinhuber } 17638e09f215SStefan Weinhuber 1764f3eb5384SStefan Weinhuber sense = dasd_get_sense(irb); 1765f60c768cSStefan Haberland /* service information message SIM */ 1766f3eb5384SStefan Weinhuber if (sense && !(sense[27] & DASD_SENSE_BIT_0) && 1767f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1768f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 17699d853cafSStefan Haberland dasd_schedule_device_bh(device); 1770f60c768cSStefan Haberland return; 1771f60c768cSStefan Haberland } 1772f60c768cSStefan Haberland 1773f3eb5384SStefan Weinhuber if ((scsw_cc(&irb->scsw) == 1) && 1774f3eb5384SStefan Weinhuber (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) && 1775f3eb5384SStefan Weinhuber (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) && 1776f3eb5384SStefan Weinhuber (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) { 1777ada3df91SStefan Haberland /* fake irb do nothing, they are handled elsewhere */ 17788e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 1779ada3df91SStefan Haberland return; 1780ada3df91SStefan Haberland } 17818e09f215SStefan Weinhuber 1782f3eb5384SStefan Weinhuber if (!sense) { 1783ada3df91SStefan Haberland /* just report other unsolicited interrupts */ 1784fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "%s", 1785ada3df91SStefan Haberland "unsolicited interrupt received"); 1786ada3df91SStefan Haberland } else { 1787fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "%s", 1788ada3df91SStefan Haberland "unsolicited interrupt received " 1789ada3df91SStefan Haberland "(sense available)"); 1790aeec92caSStefan Haberland device->discipline->dump_sense_dbf(device, irb, "unsolicited"); 1791ada3df91SStefan Haberland } 1792ada3df91SStefan Haberland 1793ada3df91SStefan Haberland dasd_schedule_device_bh(device); 17948e09f215SStefan Weinhuber return; 17958e09f215SStefan Weinhuber }; 17968e09f215SStefan Weinhuber 1797f3eb5384SStefan Weinhuber 1798f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 1799f3eb5384SStefan Weinhuber struct dasd_device *startdev, 18008e09f215SStefan Weinhuber struct dasd_block *block, 1801f3eb5384SStefan Weinhuber struct request *req, 1802f3eb5384SStefan Weinhuber sector_t first_rec, 1803f3eb5384SStefan Weinhuber sector_t last_rec, 1804f3eb5384SStefan Weinhuber sector_t first_trk, 1805f3eb5384SStefan Weinhuber sector_t last_trk, 1806f3eb5384SStefan Weinhuber unsigned int first_offs, 1807f3eb5384SStefan Weinhuber unsigned int last_offs, 1808f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1809f3eb5384SStefan Weinhuber unsigned int blksize) 18101da177e4SLinus Torvalds { 18111da177e4SLinus Torvalds struct dasd_eckd_private *private; 18121da177e4SLinus Torvalds unsigned long *idaws; 18131da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18141da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18151da177e4SLinus Torvalds struct ccw1 *ccw; 18165705f702SNeilBrown struct req_iterator iter; 18171da177e4SLinus Torvalds struct bio_vec *bv; 18181da177e4SLinus Torvalds char *dst; 1819f3eb5384SStefan Weinhuber unsigned int off; 18201da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 1821f3eb5384SStefan Weinhuber sector_t recid; 18221da177e4SLinus Torvalds unsigned char cmd, rcmd; 18238e09f215SStefan Weinhuber int use_prefix; 18248e09f215SStefan Weinhuber struct dasd_device *basedev; 18251da177e4SLinus Torvalds 18268e09f215SStefan Weinhuber basedev = block->base; 18278e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 18281da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 18291da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 18301da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 18311da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 18321da177e4SLinus Torvalds else 18331da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 1834f3eb5384SStefan Weinhuber 18351da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 18361da177e4SLinus Torvalds count = 0; 18371da177e4SLinus Torvalds cidaw = 0; 18385705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 18391da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 18401da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 18411da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18428e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1843347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 18446c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 18458e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 18461da177e4SLinus Torvalds #endif 18471da177e4SLinus Torvalds } 18481da177e4SLinus Torvalds /* Paranoia. */ 18491da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 18501da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18518e09f215SStefan Weinhuber 18528e09f215SStefan Weinhuber /* use the prefix command if available */ 18538e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 18548e09f215SStefan Weinhuber if (use_prefix) { 18558e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 18568e09f215SStefan Weinhuber cplength = 2 + count; 18578e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 18588e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 18598e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 18608e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 18618e09f215SStefan Weinhuber } else { 18621da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 18631da177e4SLinus Torvalds cplength = 2 + count; 18641da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 18658e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 18668e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 18671da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 18688e09f215SStefan Weinhuber } 18691da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 18701da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 18711da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 18721da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 18731da177e4SLinus Torvalds cplength += count; 18741da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 18751da177e4SLinus Torvalds } 18761da177e4SLinus Torvalds /* Allocate the ccw request. */ 187768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 187868b781feSStefan Haberland startdev); 18791da177e4SLinus Torvalds if (IS_ERR(cqr)) 18801da177e4SLinus Torvalds return cqr; 18811da177e4SLinus Torvalds ccw = cqr->cpaddr; 18828e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 18838e09f215SStefan Weinhuber if (use_prefix) { 18848e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 18858e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 18868e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 18878e09f215SStefan Weinhuber * Try again later. 18888e09f215SStefan Weinhuber */ 18898e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1890d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1891d54853efSMartin Schwidefsky } 18928e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 18938e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 18948e09f215SStefan Weinhuber } else { 18958e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 18968e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 18978e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 18988e09f215SStefan Weinhuber * Try again later. 18998e09f215SStefan Weinhuber */ 19008e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 19018e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 19028e09f215SStefan Weinhuber } 19038e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 19048e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 19058e09f215SStefan Weinhuber } 19061da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 19071da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 19081da177e4SLinus Torvalds recid = first_rec; 19091da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 19101da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 19111da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19121da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 19138e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 19141da177e4SLinus Torvalds } 19155705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 19161da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 19171da177e4SLinus Torvalds if (dasd_page_cache) { 19181da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1919441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 19201da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 19211da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 19221da177e4SLinus Torvalds if (copy) 19231da177e4SLinus Torvalds dst = copy + bv->bv_offset; 19241da177e4SLinus Torvalds } 19251da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 19261da177e4SLinus Torvalds sector_t trkid = recid; 19271da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 19281da177e4SLinus Torvalds rcmd = cmd; 19291da177e4SLinus Torvalds count = blksize; 19301da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 19311da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 19321da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 19331da177e4SLinus Torvalds rcmd |= 0x8; 19341da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1935ec5883abSHorst Hummel if (count < blksize && 1936ec5883abSHorst Hummel rq_data_dir(req) == READ) 19371da177e4SLinus Torvalds memset(dst + count, 0xe5, 19381da177e4SLinus Torvalds blksize - count); 19391da177e4SLinus Torvalds } 19401da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19411da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19421da177e4SLinus Torvalds trkid, recoffs + 1, 19438e09f215SStefan Weinhuber 1, rcmd, basedev, count); 19441da177e4SLinus Torvalds } 19451da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 19461da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 19471da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19481da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19491da177e4SLinus Torvalds trkid, recoffs + 1, 19501da177e4SLinus Torvalds last_rec - recid + 1, 19518e09f215SStefan Weinhuber cmd, basedev, count); 19521da177e4SLinus Torvalds } 19531da177e4SLinus Torvalds /* Read/write ccw. */ 19541da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19551da177e4SLinus Torvalds ccw->cmd_code = rcmd; 19561da177e4SLinus Torvalds ccw->count = count; 19571da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 19581da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 19591da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 19601da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 19611da177e4SLinus Torvalds } else { 19621da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 19631da177e4SLinus Torvalds ccw->flags = 0; 19641da177e4SLinus Torvalds } 19651da177e4SLinus Torvalds ccw++; 19661da177e4SLinus Torvalds dst += blksize; 19671da177e4SLinus Torvalds recid++; 19681da177e4SLinus Torvalds } 19691da177e4SLinus Torvalds } 197013de227bSHolger Smolinski if (blk_noretry_request(req) || 197113de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 19721c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 19738e09f215SStefan Weinhuber cqr->startdev = startdev; 19748e09f215SStefan Weinhuber cqr->memdev = startdev; 19758e09f215SStefan Weinhuber cqr->block = block; 19761da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 19771da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 19781da177e4SLinus Torvalds cqr->retries = 256; 19791da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19801da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19811da177e4SLinus Torvalds return cqr; 19821da177e4SLinus Torvalds } 19831da177e4SLinus Torvalds 1984f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 1985f3eb5384SStefan Weinhuber struct dasd_device *startdev, 1986f3eb5384SStefan Weinhuber struct dasd_block *block, 1987f3eb5384SStefan Weinhuber struct request *req, 1988f3eb5384SStefan Weinhuber sector_t first_rec, 1989f3eb5384SStefan Weinhuber sector_t last_rec, 1990f3eb5384SStefan Weinhuber sector_t first_trk, 1991f3eb5384SStefan Weinhuber sector_t last_trk, 1992f3eb5384SStefan Weinhuber unsigned int first_offs, 1993f3eb5384SStefan Weinhuber unsigned int last_offs, 1994f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1995f3eb5384SStefan Weinhuber unsigned int blksize) 1996f3eb5384SStefan Weinhuber { 1997f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 1998f3eb5384SStefan Weinhuber unsigned long *idaws; 1999f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2000f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2001f3eb5384SStefan Weinhuber struct req_iterator iter; 2002f3eb5384SStefan Weinhuber struct bio_vec *bv; 2003f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2004f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2005f3eb5384SStefan Weinhuber unsigned int tlf; 2006f3eb5384SStefan Weinhuber sector_t recid; 2007f3eb5384SStefan Weinhuber unsigned char cmd; 2008f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2009f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2010f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2011f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2012f3eb5384SStefan Weinhuber sector_t trkid; 2013f3eb5384SStefan Weinhuber unsigned int recoffs; 2014f3eb5384SStefan Weinhuber 2015f3eb5384SStefan Weinhuber basedev = block->base; 2016f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2017f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2018f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2019f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2020f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2021f3eb5384SStefan Weinhuber else 2022f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2023f3eb5384SStefan Weinhuber 2024f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2025f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2026f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2027f3eb5384SStefan Weinhuber * of records as upper limit. 2028f3eb5384SStefan Weinhuber */ 2029f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2030f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2031f3eb5384SStefan Weinhuber 2032f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2033f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2034f3eb5384SStefan Weinhuber 2035f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2036f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2037f3eb5384SStefan Weinhuber */ 2038f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2039f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2040f3eb5384SStefan Weinhuber 2041f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 204268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 204368b781feSStefan Haberland startdev); 2044f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2045f3eb5384SStefan Weinhuber return cqr; 2046f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2047f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2048f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2049f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2050f3eb5384SStefan Weinhuber else 2051f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2052f3eb5384SStefan Weinhuber tlf *= blksize; 2053f3eb5384SStefan Weinhuber 2054f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2055f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2056f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2057f3eb5384SStefan Weinhuber trkcount, blksize, 2058f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2059f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2060f3eb5384SStefan Weinhuber * Try again later. 2061f3eb5384SStefan Weinhuber */ 2062f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2063f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2064f3eb5384SStefan Weinhuber } 2065f3eb5384SStefan Weinhuber 2066f3eb5384SStefan Weinhuber /* 2067f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2068f3eb5384SStefan Weinhuber * following conditions: 2069f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2070f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2071f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2072f3eb5384SStefan Weinhuber */ 2073f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2074f3eb5384SStefan Weinhuber recid = first_rec; 2075f3eb5384SStefan Weinhuber new_track = 1; 2076f3eb5384SStefan Weinhuber end_idaw = 0; 2077f3eb5384SStefan Weinhuber len_to_track_end = 0; 2078f3eb5384SStefan Weinhuber idaw_dst = 0; 2079f3eb5384SStefan Weinhuber idaw_len = 0; 2080f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2081f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2082f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2083f3eb5384SStefan Weinhuber while (seg_len) { 2084f3eb5384SStefan Weinhuber if (new_track) { 2085f3eb5384SStefan Weinhuber trkid = recid; 2086f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2087f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2088f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2089f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2090f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2091f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2092f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2093f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2094f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2095f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2096f3eb5384SStefan Weinhuber ccw++; 2097f3eb5384SStefan Weinhuber recid += count; 2098f3eb5384SStefan Weinhuber new_track = 0; 209952db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 210052db45c3SStefan Weinhuber if (!idaw_dst) 210152db45c3SStefan Weinhuber idaw_dst = dst; 2102f3eb5384SStefan Weinhuber } 210352db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 210452db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2105f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2106f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2107f3eb5384SStefan Weinhuber * idaw ends 2108f3eb5384SStefan Weinhuber */ 210952db45c3SStefan Weinhuber if (!idaw_dst) { 211052db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 211152db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 211252db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 211352db45c3SStefan Weinhuber } else 2114f3eb5384SStefan Weinhuber idaw_dst = dst; 211552db45c3SStefan Weinhuber } 2116f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2117f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2118f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2119f3eb5384SStefan Weinhuber } 2120f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2121f3eb5384SStefan Weinhuber seg_len -= part_len; 2122f3eb5384SStefan Weinhuber dst += part_len; 2123f3eb5384SStefan Weinhuber idaw_len += part_len; 2124f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2125f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2126f3eb5384SStefan Weinhuber * -> create an idaw 2127f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2128f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2129f3eb5384SStefan Weinhuber */ 2130f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2131f3eb5384SStefan Weinhuber end_idaw = 1; 2132f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2133f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2134f3eb5384SStefan Weinhuber new_track = 1; 2135f3eb5384SStefan Weinhuber end_idaw = 1; 2136f3eb5384SStefan Weinhuber } 2137f3eb5384SStefan Weinhuber if (end_idaw) { 2138f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2139f3eb5384SStefan Weinhuber idaw_len); 2140f3eb5384SStefan Weinhuber idaw_dst = 0; 2141f3eb5384SStefan Weinhuber idaw_len = 0; 2142f3eb5384SStefan Weinhuber end_idaw = 0; 2143f3eb5384SStefan Weinhuber } 2144f3eb5384SStefan Weinhuber } 2145f3eb5384SStefan Weinhuber } 2146f3eb5384SStefan Weinhuber 2147f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2148f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2149f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2150f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2151f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2152f3eb5384SStefan Weinhuber cqr->block = block; 2153f3eb5384SStefan Weinhuber cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2154f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2155f3eb5384SStefan Weinhuber cqr->retries = 256; 2156f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2157f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2158f3eb5384SStefan Weinhuber return cqr; 2159f3eb5384SStefan Weinhuber } 2160f3eb5384SStefan Weinhuber 2161f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2162f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2163f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2164f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2165f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2166f3eb5384SStefan Weinhuber unsigned int blksize, 2167f3eb5384SStefan Weinhuber unsigned int total_data_size, 2168f3eb5384SStefan Weinhuber unsigned int tlf, 2169f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2170f3eb5384SStefan Weinhuber { 2171f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2172f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2173f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2174f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2175f3eb5384SStefan Weinhuber struct dcw *dcw; 2176f3eb5384SStefan Weinhuber 2177f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2178f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2179f3eb5384SStefan Weinhuber u8 pfx_cmd; 2180f3eb5384SStefan Weinhuber 2181f3eb5384SStefan Weinhuber int rc = 0; 2182f3eb5384SStefan Weinhuber int sector = 0; 2183f3eb5384SStefan Weinhuber int dn, d; 2184f3eb5384SStefan Weinhuber 2185f3eb5384SStefan Weinhuber 2186f3eb5384SStefan Weinhuber /* setup prefix data */ 2187f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2188f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2189f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2190f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2191f3eb5384SStefan Weinhuber 2192f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2193f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2194f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2195f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2196f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2197f3eb5384SStefan Weinhuber 2198f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2199f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2200f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2201f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2202f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2203f3eb5384SStefan Weinhuber } 2204f3eb5384SStefan Weinhuber 2205f3eb5384SStefan Weinhuber switch (cmd) { 2206f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2207f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2208f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2209f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2210f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2211f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2212f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2213f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2214f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2215f3eb5384SStefan Weinhuber break; 2216f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2217f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2218f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2219f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2220f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2221f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2222f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2223f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2224f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2225f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2226f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2227f3eb5384SStefan Weinhuber break; 2228f3eb5384SStefan Weinhuber default: 2229f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2230f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2231f3eb5384SStefan Weinhuber BUG(); 2232f3eb5384SStefan Weinhuber break; 2233f3eb5384SStefan Weinhuber } 2234f3eb5384SStefan Weinhuber if (rc) 2235f3eb5384SStefan Weinhuber return rc; 2236f3eb5384SStefan Weinhuber 2237f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2238f3eb5384SStefan Weinhuber 2239f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2240f3eb5384SStefan Weinhuber begcyl = trk / heads; 2241f3eb5384SStefan Weinhuber beghead = trk % heads; 2242f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2243f3eb5384SStefan Weinhuber endhead = totrk % heads; 2244f3eb5384SStefan Weinhuber 2245f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2246f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2247f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2248f3eb5384SStefan Weinhuber 2249f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2250f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2251f3eb5384SStefan Weinhuber else 2252f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2253f3eb5384SStefan Weinhuber } 2254f3eb5384SStefan Weinhuber 2255f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2256f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2257f3eb5384SStefan Weinhuber 2258f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2259f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2260f3eb5384SStefan Weinhuber 2261f3eb5384SStefan Weinhuber if (rec_on_trk) { 2262f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2263f3eb5384SStefan Weinhuber case 0x3390: 2264f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2265f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2266f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2267f3eb5384SStefan Weinhuber break; 2268f3eb5384SStefan Weinhuber case 0x3380: 2269f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2270f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2271f3eb5384SStefan Weinhuber break; 2272f3eb5384SStefan Weinhuber } 2273f3eb5384SStefan Weinhuber } 2274f3eb5384SStefan Weinhuber 2275f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2276f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2277f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2278f3eb5384SStefan Weinhuber lredata->length = tlf; 2279f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2280f3eb5384SStefan Weinhuber lredata->count = count; 2281f3eb5384SStefan Weinhuber lredata->sector = sector; 2282f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2283f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2284f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2285f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2286f3eb5384SStefan Weinhuber 2287f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2288f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2289f3eb5384SStefan Weinhuber 2290f3eb5384SStefan Weinhuber return rc; 2291f3eb5384SStefan Weinhuber } 2292f3eb5384SStefan Weinhuber 2293f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2294f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2295f3eb5384SStefan Weinhuber struct dasd_block *block, 2296f3eb5384SStefan Weinhuber struct request *req, 2297f3eb5384SStefan Weinhuber sector_t first_rec, 2298f3eb5384SStefan Weinhuber sector_t last_rec, 2299f3eb5384SStefan Weinhuber sector_t first_trk, 2300f3eb5384SStefan Weinhuber sector_t last_trk, 2301f3eb5384SStefan Weinhuber unsigned int first_offs, 2302f3eb5384SStefan Weinhuber unsigned int last_offs, 2303f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2304f3eb5384SStefan Weinhuber unsigned int blksize) 2305f3eb5384SStefan Weinhuber { 2306f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2307f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2308f3eb5384SStefan Weinhuber struct req_iterator iter; 2309f3eb5384SStefan Weinhuber struct bio_vec *bv; 2310f3eb5384SStefan Weinhuber char *dst; 2311f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2312f3eb5384SStefan Weinhuber unsigned char cmd; 2313f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2314f3eb5384SStefan Weinhuber unsigned int tlf; 2315f3eb5384SStefan Weinhuber struct itcw *itcw; 2316f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2317f3eb5384SStefan Weinhuber int itcw_op; 2318f3eb5384SStefan Weinhuber size_t itcw_size; 2319f3eb5384SStefan Weinhuber 2320f3eb5384SStefan Weinhuber basedev = block->base; 2321f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2322f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2323f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2324f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2325f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2326f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2327f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2328f3eb5384SStefan Weinhuber } else 2329f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2330f3eb5384SStefan Weinhuber 2331f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2332f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2333f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2334f3eb5384SStefan Weinhuber */ 2335f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2336f3eb5384SStefan Weinhuber ctidaw = 0; 2337f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2338f3eb5384SStefan Weinhuber ++ctidaw; 2339f3eb5384SStefan Weinhuber } 2340f3eb5384SStefan Weinhuber 2341f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2342f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 234368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2344f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2345f3eb5384SStefan Weinhuber return cqr; 2346f3eb5384SStefan Weinhuber 2347f3eb5384SStefan Weinhuber cqr->cpmode = 1; 2348f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2349f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2350f3eb5384SStefan Weinhuber cqr->block = block; 2351f3eb5384SStefan Weinhuber cqr->expires = 100*HZ; 2352f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2353f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2354f3eb5384SStefan Weinhuber cqr->retries = 10; 2355f3eb5384SStefan Weinhuber 2356f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2357f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2358f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2359f3eb5384SStefan Weinhuber else 2360f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2361f3eb5384SStefan Weinhuber tlf *= blksize; 2362f3eb5384SStefan Weinhuber 2363f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2364f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2365f3eb5384SStefan Weinhuber 2366f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2367f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2368f3eb5384SStefan Weinhuber first_offs + 1, 2369f3eb5384SStefan Weinhuber trkcount, blksize, 2370f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2371f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2372f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2373f3eb5384SStefan Weinhuber * Try again later. 2374f3eb5384SStefan Weinhuber */ 2375f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2376f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2377f3eb5384SStefan Weinhuber } 2378f3eb5384SStefan Weinhuber 2379f3eb5384SStefan Weinhuber /* 2380f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2381f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2382f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2383f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2384f3eb5384SStefan Weinhuber */ 2385f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2386f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2387f3eb5384SStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len); 2388f3eb5384SStefan Weinhuber if (IS_ERR(last_tidaw)) 2389f3eb5384SStefan Weinhuber return (struct dasd_ccw_req *)last_tidaw; 2390f3eb5384SStefan Weinhuber } 2391f3eb5384SStefan Weinhuber 2392f3eb5384SStefan Weinhuber last_tidaw->flags |= 0x80; 2393f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2394f3eb5384SStefan Weinhuber 2395f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2396f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2397f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2398f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2399f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2400f3eb5384SStefan Weinhuber cqr->block = block; 2401f3eb5384SStefan Weinhuber cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 2402f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2403f3eb5384SStefan Weinhuber cqr->retries = 256; 2404f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2405f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2406f3eb5384SStefan Weinhuber return cqr; 2407f3eb5384SStefan Weinhuber } 2408f3eb5384SStefan Weinhuber 2409f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2410f3eb5384SStefan Weinhuber struct dasd_block *block, 2411f3eb5384SStefan Weinhuber struct request *req) 2412f3eb5384SStefan Weinhuber { 2413f3eb5384SStefan Weinhuber int tpm, cmdrtd, cmdwtd; 2414f3eb5384SStefan Weinhuber int use_prefix; 241545b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2416f3eb5384SStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 241745b44d76SStefan Weinhuber #endif 241845b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2419f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2420f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2421f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2422f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2423f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2424f3eb5384SStefan Weinhuber int cdlspecial; 2425f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2426f3eb5384SStefan Weinhuber 2427f3eb5384SStefan Weinhuber basedev = block->base; 2428f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2429f3eb5384SStefan Weinhuber 2430f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2431f3eb5384SStefan Weinhuber blksize = block->bp_block; 2432f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 24336fca97a9SStefan Haberland if (blk_per_trk == 0) 24346fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2435f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 243683096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2437f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2438f3eb5384SStefan Weinhuber last_rec = last_trk = 243983096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2440f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2441f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2442f3eb5384SStefan Weinhuber 2443f3eb5384SStefan Weinhuber /* is transport mode supported? */ 244445b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2445f3eb5384SStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 2446f3eb5384SStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 2447f3eb5384SStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 2448f3eb5384SStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 244945b44d76SStefan Weinhuber #else 245045b44d76SStefan Weinhuber tpm = 0; 245145b44d76SStefan Weinhuber #endif 2452f3eb5384SStefan Weinhuber 2453f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2454f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2455f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2456f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2457f3eb5384SStefan Weinhuber 2458f3eb5384SStefan Weinhuber cqr = NULL; 2459f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2460f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2461f3eb5384SStefan Weinhuber } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) { 2462f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2463f3eb5384SStefan Weinhuber first_rec, last_rec, 2464f3eb5384SStefan Weinhuber first_trk, last_trk, 2465f3eb5384SStefan Weinhuber first_offs, last_offs, 2466f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2467f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2468f3eb5384SStefan Weinhuber cqr = NULL; 2469f3eb5384SStefan Weinhuber } else if (use_prefix && 2470f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2471f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2472f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2473f3eb5384SStefan Weinhuber first_rec, last_rec, 2474f3eb5384SStefan Weinhuber first_trk, last_trk, 2475f3eb5384SStefan Weinhuber first_offs, last_offs, 2476f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2477f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2478f3eb5384SStefan Weinhuber cqr = NULL; 2479f3eb5384SStefan Weinhuber } 2480f3eb5384SStefan Weinhuber if (!cqr) 2481f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2482f3eb5384SStefan Weinhuber first_rec, last_rec, 2483f3eb5384SStefan Weinhuber first_trk, last_trk, 2484f3eb5384SStefan Weinhuber first_offs, last_offs, 2485f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2486f3eb5384SStefan Weinhuber return cqr; 2487f3eb5384SStefan Weinhuber } 2488f3eb5384SStefan Weinhuber 24891da177e4SLinus Torvalds static int 24901da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 24911da177e4SLinus Torvalds { 24921da177e4SLinus Torvalds struct dasd_eckd_private *private; 24931da177e4SLinus Torvalds struct ccw1 *ccw; 24945705f702SNeilBrown struct req_iterator iter; 24951da177e4SLinus Torvalds struct bio_vec *bv; 24961da177e4SLinus Torvalds char *dst, *cda; 24971da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 24981da177e4SLinus Torvalds sector_t recid; 24995705f702SNeilBrown int status; 25001da177e4SLinus Torvalds 25011da177e4SLinus Torvalds if (!dasd_page_cache) 25021da177e4SLinus Torvalds goto out; 25038e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 25048e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 25051da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 250683096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 25071da177e4SLinus Torvalds ccw = cqr->cpaddr; 25081da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 25091da177e4SLinus Torvalds ccw++; 25101da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 25111da177e4SLinus Torvalds ccw++; 25125705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 25131da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 25141da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 25151da177e4SLinus Torvalds /* Skip locate record. */ 25161da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 25171da177e4SLinus Torvalds ccw++; 25181da177e4SLinus Torvalds if (dst) { 25191da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 25201da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 25211da177e4SLinus Torvalds else 25221da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 25231da177e4SLinus Torvalds if (dst != cda) { 25241da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 25251da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 25261da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 25271da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 25281da177e4SLinus Torvalds } 25291da177e4SLinus Torvalds dst = NULL; 25301da177e4SLinus Torvalds } 25311da177e4SLinus Torvalds ccw++; 25321da177e4SLinus Torvalds recid++; 25331da177e4SLinus Torvalds } 25341da177e4SLinus Torvalds } 25351da177e4SLinus Torvalds out: 25361da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 25378e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 25381da177e4SLinus Torvalds return status; 25391da177e4SLinus Torvalds } 25401da177e4SLinus Torvalds 25418e09f215SStefan Weinhuber /* 2542f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 25438e09f215SStefan Weinhuber * 25448e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 25458e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 25468e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 25478e09f215SStefan Weinhuber */ 25488e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 25498e09f215SStefan Weinhuber { 25508e09f215SStefan Weinhuber struct ccw1 *ccw; 25518e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 2552f3eb5384SStefan Weinhuber struct tcw *tcw; 2553f3eb5384SStefan Weinhuber struct tccb *tccb; 2554f3eb5384SStefan Weinhuber struct dcw *dcw; 25558e09f215SStefan Weinhuber 2556f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 2557f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 2558f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 2559f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 2560f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2561f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 2562f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 2563f3eb5384SStefan Weinhuber } else { 25648e09f215SStefan Weinhuber ccw = cqr->cpaddr; 25658e09f215SStefan Weinhuber pfxdata = cqr->data; 25668e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 25678e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 25688e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 25698e09f215SStefan Weinhuber } 25708e09f215SStefan Weinhuber } 2571f3eb5384SStefan Weinhuber } 25728e09f215SStefan Weinhuber 25738e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 25748e09f215SStefan Weinhuber 25758e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 25768e09f215SStefan Weinhuber struct dasd_block *block, 25778e09f215SStefan Weinhuber struct request *req) 25788e09f215SStefan Weinhuber { 25798e09f215SStefan Weinhuber struct dasd_eckd_private *private; 25808e09f215SStefan Weinhuber struct dasd_device *startdev; 25818e09f215SStefan Weinhuber unsigned long flags; 25828e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 25838e09f215SStefan Weinhuber 25848e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 25858e09f215SStefan Weinhuber if (!startdev) 25868e09f215SStefan Weinhuber startdev = base; 25878e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 25888e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 25898e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 25908e09f215SStefan Weinhuber 25918e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 25928e09f215SStefan Weinhuber private->count++; 25938e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 25948e09f215SStefan Weinhuber if (IS_ERR(cqr)) 25958e09f215SStefan Weinhuber private->count--; 25968e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 25978e09f215SStefan Weinhuber return cqr; 25988e09f215SStefan Weinhuber } 25998e09f215SStefan Weinhuber 26008e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 26018e09f215SStefan Weinhuber struct request *req) 26028e09f215SStefan Weinhuber { 26038e09f215SStefan Weinhuber struct dasd_eckd_private *private; 26048e09f215SStefan Weinhuber unsigned long flags; 26058e09f215SStefan Weinhuber 26068e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 26078e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 26088e09f215SStefan Weinhuber private->count--; 26098e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 26108e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 26118e09f215SStefan Weinhuber } 26128e09f215SStefan Weinhuber 26131da177e4SLinus Torvalds static int 26141da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 26151da177e4SLinus Torvalds struct dasd_information2_t * info) 26161da177e4SLinus Torvalds { 26171da177e4SLinus Torvalds struct dasd_eckd_private *private; 26181da177e4SLinus Torvalds 26191da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 26201da177e4SLinus Torvalds info->label_block = 2; 26211da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 26221da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 26231da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 26241da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 26251da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 26264abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 26274abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 26284abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 26294abb08c2SStefan Weinhuber info->confdata_size); 26301da177e4SLinus Torvalds return 0; 26311da177e4SLinus Torvalds } 26321da177e4SLinus Torvalds 26331da177e4SLinus Torvalds /* 26341da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 26351da177e4SLinus Torvalds */ 26361da177e4SLinus Torvalds 26371da177e4SLinus Torvalds /* 26381da177e4SLinus Torvalds * Release device ioctl. 26391da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 26401da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 26411da177e4SLinus Torvalds */ 26421da177e4SLinus Torvalds static int 26431107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 26441da177e4SLinus Torvalds { 26451da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26461da177e4SLinus Torvalds int rc; 2647f3eb5384SStefan Weinhuber struct ccw1 *ccw; 26481da177e4SLinus Torvalds 26491da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26501da177e4SLinus Torvalds return -EACCES; 26511da177e4SLinus Torvalds 265268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 26531da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2654fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 26551da177e4SLinus Torvalds "Could not allocate initialization request"); 26561da177e4SLinus Torvalds return PTR_ERR(cqr); 26571da177e4SLinus Torvalds } 2658f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2659f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2660f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2661f3eb5384SStefan Weinhuber ccw->count = 32; 2662f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 26638e09f215SStefan Weinhuber cqr->startdev = device; 26648e09f215SStefan Weinhuber cqr->memdev = device; 26651da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 26661c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2667336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 26681da177e4SLinus Torvalds cqr->expires = 2 * HZ; 26691da177e4SLinus Torvalds cqr->buildclk = get_clock(); 26701da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 26711da177e4SLinus Torvalds 26721da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 26731da177e4SLinus Torvalds 26748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 26751da177e4SLinus Torvalds return rc; 26761da177e4SLinus Torvalds } 26771da177e4SLinus Torvalds 26781da177e4SLinus Torvalds /* 26791da177e4SLinus Torvalds * Reserve device ioctl. 26801da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 26811da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 26821da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 26831da177e4SLinus Torvalds */ 26841da177e4SLinus Torvalds static int 26851107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 26861da177e4SLinus Torvalds { 26871da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26881da177e4SLinus Torvalds int rc; 2689f3eb5384SStefan Weinhuber struct ccw1 *ccw; 26901da177e4SLinus Torvalds 26911da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26921da177e4SLinus Torvalds return -EACCES; 26931da177e4SLinus Torvalds 269468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 26951da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2696fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 26971da177e4SLinus Torvalds "Could not allocate initialization request"); 26981da177e4SLinus Torvalds return PTR_ERR(cqr); 26991da177e4SLinus Torvalds } 2700f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2701f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2702f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2703f3eb5384SStefan Weinhuber ccw->count = 32; 2704f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 27058e09f215SStefan Weinhuber cqr->startdev = device; 27068e09f215SStefan Weinhuber cqr->memdev = device; 27071da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27081c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2709336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 27101da177e4SLinus Torvalds cqr->expires = 2 * HZ; 27111da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27121da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27131da177e4SLinus Torvalds 27141da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 27151da177e4SLinus Torvalds 27168e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27171da177e4SLinus Torvalds return rc; 27181da177e4SLinus Torvalds } 27191da177e4SLinus Torvalds 27201da177e4SLinus Torvalds /* 27211da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 27221da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 27231da177e4SLinus Torvalds * (unconditional reserve) 27241da177e4SLinus Torvalds */ 27251da177e4SLinus Torvalds static int 27261107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 27271da177e4SLinus Torvalds { 27281da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27291da177e4SLinus Torvalds int rc; 2730f3eb5384SStefan Weinhuber struct ccw1 *ccw; 27311da177e4SLinus Torvalds 27321da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27331da177e4SLinus Torvalds return -EACCES; 27341da177e4SLinus Torvalds 273568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 27361da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2737fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 27381da177e4SLinus Torvalds "Could not allocate initialization request"); 27391da177e4SLinus Torvalds return PTR_ERR(cqr); 27401da177e4SLinus Torvalds } 2741f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2742f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 2743f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2744f3eb5384SStefan Weinhuber ccw->count = 32; 2745f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 27468e09f215SStefan Weinhuber cqr->startdev = device; 27478e09f215SStefan Weinhuber cqr->memdev = device; 27481da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27491c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2750336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 27511da177e4SLinus Torvalds cqr->expires = 2 * HZ; 27521da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27531da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27541da177e4SLinus Torvalds 27551da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 27561da177e4SLinus Torvalds 27578e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27581da177e4SLinus Torvalds return rc; 27591da177e4SLinus Torvalds } 27601da177e4SLinus Torvalds 27611da177e4SLinus Torvalds /* 27621da177e4SLinus Torvalds * Read performance statistics 27631da177e4SLinus Torvalds */ 27641da177e4SLinus Torvalds static int 27651107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 27661da177e4SLinus Torvalds { 27671da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 27681da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 27691da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27701da177e4SLinus Torvalds struct ccw1 *ccw; 27711da177e4SLinus Torvalds int rc; 27721da177e4SLinus Torvalds 277368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 27741da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 27751da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 27761da177e4SLinus Torvalds device); 27771da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2778fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 27791da177e4SLinus Torvalds "Could not allocate initialization request"); 27801da177e4SLinus Torvalds return PTR_ERR(cqr); 27811da177e4SLinus Torvalds } 27828e09f215SStefan Weinhuber cqr->startdev = device; 27838e09f215SStefan Weinhuber cqr->memdev = device; 27841da177e4SLinus Torvalds cqr->retries = 0; 2785eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27861da177e4SLinus Torvalds cqr->expires = 10 * HZ; 27871da177e4SLinus Torvalds 27881da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 27891da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 27901da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 27911da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 27925d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 27931da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 27941da177e4SLinus Torvalds 27951da177e4SLinus Torvalds ccw = cqr->cpaddr; 27961da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 27971da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 27981da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 27991da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 28001da177e4SLinus Torvalds 28011da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 28021da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 28031da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 28041da177e4SLinus Torvalds 28051da177e4SLinus Torvalds ccw++; 28061da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 28071da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 28081da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 28091da177e4SLinus Torvalds 28101da177e4SLinus Torvalds cqr->buildclk = get_clock(); 28111da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 28121da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 28131da177e4SLinus Torvalds if (rc == 0) { 28141da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 28151da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 28161107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 28171107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 28181107ccfbSChristoph Hellwig rc = -EFAULT; 28191da177e4SLinus Torvalds } 28208e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 28211da177e4SLinus Torvalds return rc; 28221da177e4SLinus Torvalds } 28231da177e4SLinus Torvalds 28241da177e4SLinus Torvalds /* 28251da177e4SLinus Torvalds * Get attributes (cache operations) 28261da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 28271da177e4SLinus Torvalds */ 28281da177e4SLinus Torvalds static int 28291107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 28301da177e4SLinus Torvalds { 28311107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 28321107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 28331107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 28341da177e4SLinus Torvalds int rc; 28351da177e4SLinus Torvalds 28361da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 28371da177e4SLinus Torvalds return -EACCES; 28381107ccfbSChristoph Hellwig if (!argp) 28391da177e4SLinus Torvalds return -EINVAL; 28401da177e4SLinus Torvalds 28411107ccfbSChristoph Hellwig rc = 0; 28421107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 28431107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 28441107ccfbSChristoph Hellwig rc = -EFAULT; 28451da177e4SLinus Torvalds 28461da177e4SLinus Torvalds return rc; 28471da177e4SLinus Torvalds } 28481da177e4SLinus Torvalds 28491da177e4SLinus Torvalds /* 28501da177e4SLinus Torvalds * Set attributes (cache operations) 28511da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 28521da177e4SLinus Torvalds */ 28531da177e4SLinus Torvalds static int 28541107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 28551da177e4SLinus Torvalds { 28561107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 28571107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 28581da177e4SLinus Torvalds struct attrib_data_t attrib; 28591da177e4SLinus Torvalds 28601da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 28611da177e4SLinus Torvalds return -EACCES; 28621107ccfbSChristoph Hellwig if (!argp) 28631da177e4SLinus Torvalds return -EINVAL; 28641da177e4SLinus Torvalds 28651107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 28661da177e4SLinus Torvalds return -EFAULT; 28671da177e4SLinus Torvalds private->attrib = attrib; 28681da177e4SLinus Torvalds 2869fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2870fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 28711da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 28721da177e4SLinus Torvalds return 0; 28731da177e4SLinus Torvalds } 28741da177e4SLinus Torvalds 2875ab1d848fSNigel Hislop /* 2876ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 2877ab1d848fSNigel Hislop * CCWs are PSF and RSSD 2878ab1d848fSNigel Hislop */ 2879ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2880ab1d848fSNigel Hislop { 2881ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 2882ab1d848fSNigel Hislop char *psf_data, *rssd_result; 2883ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 2884ab1d848fSNigel Hislop struct ccw1 *ccw; 288552898025SNigel Hislop char psf0, psf1; 2886ab1d848fSNigel Hislop int rc; 2887ab1d848fSNigel Hislop 288852898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 288952898025SNigel Hislop return -EACCES; 289052898025SNigel Hislop psf0 = psf1 = 0; 289152898025SNigel Hislop 2892ab1d848fSNigel Hislop /* Copy parms from caller */ 2893ab1d848fSNigel Hislop rc = -EFAULT; 2894ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2895ab1d848fSNigel Hislop goto out; 2896f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 2897ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 2898ab1d848fSNigel Hislop rc = -EINVAL; 2899f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 2900ab1d848fSNigel Hislop goto out; 2901f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 2902f8b06859SHeiko Carstens goto out; 2903f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 2904f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 2905ab1d848fSNigel Hislop } 2906ab1d848fSNigel Hislop /* alloc I/O data area */ 2907ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2908ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2909ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 2910ab1d848fSNigel Hislop rc = -ENOMEM; 2911ab1d848fSNigel Hislop goto out_free; 2912ab1d848fSNigel Hislop } 2913ab1d848fSNigel Hislop 2914ab1d848fSNigel Hislop /* get syscall header from user space */ 2915ab1d848fSNigel Hislop rc = -EFAULT; 2916ab1d848fSNigel Hislop if (copy_from_user(psf_data, 2917ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 2918ab1d848fSNigel Hislop usrparm.psf_data_len)) 2919ab1d848fSNigel Hislop goto out_free; 292052898025SNigel Hislop psf0 = psf_data[0]; 292152898025SNigel Hislop psf1 = psf_data[1]; 2922ab1d848fSNigel Hislop 2923ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 292468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 2925ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 2926fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2927ab1d848fSNigel Hislop "Could not allocate initialization request"); 2928ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 2929ab1d848fSNigel Hislop goto out_free; 2930ab1d848fSNigel Hislop } 2931ab1d848fSNigel Hislop 2932ab1d848fSNigel Hislop cqr->startdev = device; 2933ab1d848fSNigel Hislop cqr->memdev = device; 2934ab1d848fSNigel Hislop cqr->retries = 3; 2935ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 2936ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 2937ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 2938ab1d848fSNigel Hislop 2939ab1d848fSNigel Hislop /* Build the ccws */ 2940ab1d848fSNigel Hislop ccw = cqr->cpaddr; 2941ab1d848fSNigel Hislop 2942ab1d848fSNigel Hislop /* PSF ccw */ 2943ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 2944ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 2945ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 2946ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 2947ab1d848fSNigel Hislop 2948ab1d848fSNigel Hislop ccw++; 2949ab1d848fSNigel Hislop 2950ab1d848fSNigel Hislop /* RSSD ccw */ 2951ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2952ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 2953ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 2954ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 2955ab1d848fSNigel Hislop 2956ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 2957ab1d848fSNigel Hislop if (rc) 2958ab1d848fSNigel Hislop goto out_sfree; 2959ab1d848fSNigel Hislop 2960ab1d848fSNigel Hislop rc = -EFAULT; 2961ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 2962ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 2963ab1d848fSNigel Hislop goto out_sfree; 2964ab1d848fSNigel Hislop rc = 0; 2965ab1d848fSNigel Hislop 2966ab1d848fSNigel Hislop out_sfree: 2967ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 2968ab1d848fSNigel Hislop out_free: 2969ab1d848fSNigel Hislop kfree(rssd_result); 2970ab1d848fSNigel Hislop kfree(psf_data); 2971ab1d848fSNigel Hislop out: 297252898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 297352898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 297452898025SNigel Hislop (int) psf0, (int) psf1, rc); 2975ab1d848fSNigel Hislop return rc; 2976ab1d848fSNigel Hislop } 2977ab1d848fSNigel Hislop 29781107ccfbSChristoph Hellwig static int 29798e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 29801107ccfbSChristoph Hellwig { 29818e09f215SStefan Weinhuber struct dasd_device *device = block->base; 29828e09f215SStefan Weinhuber 29831107ccfbSChristoph Hellwig switch (cmd) { 29841107ccfbSChristoph Hellwig case BIODASDGATTR: 29851107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 29861107ccfbSChristoph Hellwig case BIODASDSATTR: 29871107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 29881107ccfbSChristoph Hellwig case BIODASDPSRD: 29891107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 29901107ccfbSChristoph Hellwig case BIODASDRLSE: 29911107ccfbSChristoph Hellwig return dasd_eckd_release(device); 29921107ccfbSChristoph Hellwig case BIODASDRSRV: 29931107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 29941107ccfbSChristoph Hellwig case BIODASDSLCK: 29951107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 2996ab1d848fSNigel Hislop case BIODASDSYMMIO: 2997ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 29981107ccfbSChristoph Hellwig default: 29991107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 30001107ccfbSChristoph Hellwig } 30011107ccfbSChristoph Hellwig } 30021107ccfbSChristoph Hellwig 30031da177e4SLinus Torvalds /* 3004445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3005445b5b49SHorst Hummel * and return number of printed chars. 3006445b5b49SHorst Hummel */ 30074d284cacSHeiko Carstens static int 3008445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3009445b5b49SHorst Hummel { 3010445b5b49SHorst Hummel int len, count; 3011445b5b49SHorst Hummel char *datap; 3012445b5b49SHorst Hummel 3013445b5b49SHorst Hummel len = 0; 3014445b5b49SHorst Hummel while (from <= to) { 3015445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3016445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3017445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3018445b5b49SHorst Hummel 3019445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3020445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3021445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3022445b5b49SHorst Hummel else 3023445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3024445b5b49SHorst Hummel 3025445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3026445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3027445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3028445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3029445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3030445b5b49SHorst Hummel } 3031445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3032445b5b49SHorst Hummel from++; 3033445b5b49SHorst Hummel } 3034445b5b49SHorst Hummel return len; 3035445b5b49SHorst Hummel } 3036445b5b49SHorst Hummel 3037fc19f381SStefan Haberland static void 3038aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3039aeec92caSStefan Haberland char *reason) 3040fc19f381SStefan Haberland { 3041fc19f381SStefan Haberland u64 *sense; 3042fc19f381SStefan Haberland 3043aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3044fc19f381SStefan Haberland if (sense) { 3045fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, 3046aeec92caSStefan Haberland "%s: %s %02x%02x%02x %016llx %016llx %016llx " 3047aeec92caSStefan Haberland "%016llx", reason, 3048aeec92caSStefan Haberland scsw_is_tm(&irb->scsw) ? "t" : "c", 3049aeec92caSStefan Haberland scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), 3050aeec92caSStefan Haberland scsw_dstat(&irb->scsw), sense[0], sense[1], 3051aeec92caSStefan Haberland sense[2], sense[3]); 3052fc19f381SStefan Haberland } else { 3053fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, "%s", 3054fc19f381SStefan Haberland "SORRY - NO VALID SENSE AVAILABLE\n"); 3055fc19f381SStefan Haberland } 3056fc19f381SStefan Haberland } 3057fc19f381SStefan Haberland 3058445b5b49SHorst Hummel /* 30591da177e4SLinus Torvalds * Print sense data and related channel program. 30601da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 30611da177e4SLinus Torvalds */ 3062f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 30638e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 30641da177e4SLinus Torvalds { 30651da177e4SLinus Torvalds char *page; 3066445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3067445b5b49SHorst Hummel int len, sl, sct; 30681da177e4SLinus Torvalds 30691da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 30701da177e4SLinus Torvalds if (page == NULL) { 3071fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3072fc19f381SStefan Haberland "No memory to dump sense data\n"); 30731da177e4SLinus Torvalds return; 30741da177e4SLinus Torvalds } 3075445b5b49SHorst Hummel /* dump the sense data */ 30761da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 30771da177e4SLinus Torvalds " I/O status report for device %s:\n", 30782a0217d5SKay Sievers dev_name(&device->cdev->dev)); 30791da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30806cc7f168SStefan Weinhuber " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n", 30816cc7f168SStefan Weinhuber req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 3082294001a8SStefan Haberland scsw_cc(&irb->scsw), req ? req->intrc : 0); 30831da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30841da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 30852a0217d5SKay Sievers dev_name(&device->cdev->dev), 308623d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 30871da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 30881da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 30891da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 30901da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 30911da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 30921da177e4SLinus Torvalds 30931da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 30941da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 30951da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 30961da177e4SLinus Torvalds } 30971da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 30981da177e4SLinus Torvalds } 30991da177e4SLinus Torvalds 31001da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 31011da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3102445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31031da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 31041da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 31051da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 31061da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 31071da177e4SLinus Torvalds } else { 31081da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3109445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31101da177e4SLinus Torvalds " 32 Byte: Format: %x " 31111da177e4SLinus Torvalds "Exception class %x\n", 31121da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 31131da177e4SLinus Torvalds } 31141da177e4SLinus Torvalds } else { 3115445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31161da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 31171da177e4SLinus Torvalds } 3118445b5b49SHorst Hummel printk("%s", page); 31191da177e4SLinus Torvalds 31208e09f215SStefan Weinhuber if (req) { 31218e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3122445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3123445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3124445b5b49SHorst Hummel first = req->cpaddr; 3125445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3126445b5b49SHorst Hummel to = min(first + 6, last); 31271da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 31281da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3129445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3130445b5b49SHorst Hummel printk("%s", page); 31311da177e4SLinus Torvalds 3132445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3133445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 31341da177e4SLinus Torvalds len = 0; 3135445b5b49SHorst Hummel from = ++to; 313623d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 313723d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3138445b5b49SHorst Hummel if (from < fail - 2) { 3139445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3140445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 31411da177e4SLinus Torvalds } 3142445b5b49SHorst Hummel to = min(fail + 1, last); 3143445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 31441da177e4SLinus Torvalds 3145445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3146445b5b49SHorst Hummel from = max(from, ++to); 3147445b5b49SHorst Hummel if (from < last - 1) { 3148445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 31491da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 31501da177e4SLinus Torvalds } 3151445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 31521da177e4SLinus Torvalds if (len > 0) 3153445b5b49SHorst Hummel printk("%s", page); 31548e09f215SStefan Weinhuber } 31551da177e4SLinus Torvalds free_page((unsigned long) page); 31561da177e4SLinus Torvalds } 31571da177e4SLinus Torvalds 3158f3eb5384SStefan Weinhuber 3159f3eb5384SStefan Weinhuber /* 3160f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3161f3eb5384SStefan Weinhuber */ 3162f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3163f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3164f3eb5384SStefan Weinhuber { 3165f3eb5384SStefan Weinhuber char *page; 3166f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3167f3eb5384SStefan Weinhuber 3168f3eb5384SStefan Weinhuber struct tsb *tsb; 3169f3eb5384SStefan Weinhuber u8 *sense; 3170f3eb5384SStefan Weinhuber 3171f3eb5384SStefan Weinhuber 3172f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3173f3eb5384SStefan Weinhuber if (page == NULL) { 3174fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3175f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3176f3eb5384SStefan Weinhuber return; 3177f3eb5384SStefan Weinhuber } 3178f3eb5384SStefan Weinhuber /* dump the sense data */ 3179f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3180f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3181f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3182f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 31836cc7f168SStefan Weinhuber " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d " 3184f3eb5384SStefan Weinhuber "fcxs: 0x%02X schxs: 0x%02X\n", req, 3185f3eb5384SStefan Weinhuber scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 31866cc7f168SStefan Weinhuber scsw_cc(&irb->scsw), req->intrc, 3187f3eb5384SStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs); 3188f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3189f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3190f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3191f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3192f3eb5384SStefan Weinhuber 3193f3eb5384SStefan Weinhuber tsb = NULL; 3194f3eb5384SStefan Weinhuber sense = NULL; 3195b8fde722SStefan Haberland if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01)) 3196f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3197f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3198f3eb5384SStefan Weinhuber 3199b8fde722SStefan Haberland if (tsb) { 3200f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3201f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3202f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3203f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3204f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3205f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3206f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3207f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3208f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3209f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3210f3eb5384SStefan Weinhuber " residual %d\n", residual); 3211f3eb5384SStefan Weinhuber 3212f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3213f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3214f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3215f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3216f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3217f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3218f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3219f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3220f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3221f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3222f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3223f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3224f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3225f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3226f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3227f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3228f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3229f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3230f3eb5384SStefan Weinhuber break; 3231f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3232f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3233f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3234f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3235f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rcq: "); 3236f3eb5384SStefan Weinhuber for (sl = 0; sl < 16; sl++) { 3237f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3238f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3239f3eb5384SStefan Weinhuber tsb->tsa.ddpc.rcq[sl]); 3240f3eb5384SStefan Weinhuber } 3241f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3242f3eb5384SStefan Weinhuber } 3243f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3244f3eb5384SStefan Weinhuber break; 3245f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3246f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3247f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3248f3eb5384SStefan Weinhuber break; 3249f3eb5384SStefan Weinhuber } 3250f3eb5384SStefan Weinhuber 3251f3eb5384SStefan Weinhuber if (sense) { 3252f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3253f3eb5384SStefan Weinhuber len += sprintf(page + len, 3254f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3255f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3256f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3257f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3258f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3259f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3260f3eb5384SStefan Weinhuber } 3261f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3262f3eb5384SStefan Weinhuber } 3263f3eb5384SStefan Weinhuber 3264f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3265f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3266f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3267f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3268f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3269f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3270f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3271f3eb5384SStefan Weinhuber } else { 3272f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3273f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3274f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3275f3eb5384SStefan Weinhuber "Exception class %x\n", 3276f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3277f3eb5384SStefan Weinhuber } 3278f3eb5384SStefan Weinhuber } else { 3279f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3280f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3281f3eb5384SStefan Weinhuber } 3282f3eb5384SStefan Weinhuber } else { 3283f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3284f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3285f3eb5384SStefan Weinhuber } 3286f3eb5384SStefan Weinhuber printk("%s", page); 3287f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3288f3eb5384SStefan Weinhuber } 3289f3eb5384SStefan Weinhuber 3290f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3291f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3292f3eb5384SStefan Weinhuber { 3293f3eb5384SStefan Weinhuber if (req && scsw_is_tm(&req->irb.scsw)) 3294f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3295f3eb5384SStefan Weinhuber else 3296f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3297f3eb5384SStefan Weinhuber } 3298f3eb5384SStefan Weinhuber 3299501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 3300d41dd122SStefan Haberland { 3301d41dd122SStefan Haberland /* 3302d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3303d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3304d41dd122SStefan Haberland * information like PAV support that might have changed 3305d41dd122SStefan Haberland */ 3306d41dd122SStefan Haberland dasd_alias_remove_device(device); 3307d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3308d41dd122SStefan Haberland 3309d41dd122SStefan Haberland return 0; 3310d41dd122SStefan Haberland } 3311d41dd122SStefan Haberland 3312501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 3313d41dd122SStefan Haberland { 3314d41dd122SStefan Haberland struct dasd_eckd_private *private; 33156fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 3316d41dd122SStefan Haberland int is_known, rc; 3317d41dd122SStefan Haberland struct dasd_uid temp_uid; 3318a7602f6cSStefan Haberland unsigned long flags; 3319d41dd122SStefan Haberland 3320d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3321d41dd122SStefan Haberland 3322d41dd122SStefan Haberland /* Read Configuration Data */ 3323d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3324d41dd122SStefan Haberland if (rc) 3325d41dd122SStefan Haberland goto out_err; 3326d41dd122SStefan Haberland 33272dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 33282dedf0d9SStefan Haberland /* Generate device unique id */ 33292dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 33302dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3331d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3332a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 3333a7602f6cSStefan Haberland "changed\n"); 33342dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3335d41dd122SStefan Haberland if (rc) 3336d41dd122SStefan Haberland goto out_err; 3337d41dd122SStefan Haberland 3338d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3339d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3340d41dd122SStefan Haberland if (is_known < 0) 3341d41dd122SStefan Haberland return is_known; 3342d41dd122SStefan Haberland if (!is_known) { 3343f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 3344f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 3345f4ac1d02SStefan Weinhuber } else 3346f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 3347f4ac1d02SStefan Weinhuber 3348f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 3349f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 3350d41dd122SStefan Haberland if (rc) 3351d41dd122SStefan Haberland goto out_err; 3352d41dd122SStefan Haberland 3353d41dd122SStefan Haberland /* Read Feature Codes */ 335468d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 3355d41dd122SStefan Haberland 3356d41dd122SStefan Haberland /* Read Device Characteristics */ 335768b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 33586fca97a9SStefan Haberland &temp_rdc_data, 64); 3359d41dd122SStefan Haberland if (rc) { 3360b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 3361b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 3362d41dd122SStefan Haberland goto out_err; 3363d41dd122SStefan Haberland } 3364a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 33656fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 3366a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3367d41dd122SStefan Haberland 3368d41dd122SStefan Haberland /* add device to alias management */ 3369d41dd122SStefan Haberland dasd_alias_add_device(device); 3370d41dd122SStefan Haberland 3371d41dd122SStefan Haberland return 0; 3372d41dd122SStefan Haberland 3373d41dd122SStefan Haberland out_err: 3374e6125fbaSStefan Haberland return -1; 3375d41dd122SStefan Haberland } 3376d41dd122SStefan Haberland 3377501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 3378501183f2SStefan Haberland { 3379501183f2SStefan Haberland struct dasd_eckd_private *private; 3380501183f2SStefan Haberland int rc, old_base; 33812dedf0d9SStefan Haberland char print_uid[60]; 33822dedf0d9SStefan Haberland struct dasd_uid uid; 33832dedf0d9SStefan Haberland unsigned long flags; 3384501183f2SStefan Haberland 3385501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 33862dedf0d9SStefan Haberland 33872dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3388501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 33892dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 33902dedf0d9SStefan Haberland 3391501183f2SStefan Haberland /* Read Configuration Data */ 3392501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 3393501183f2SStefan Haberland if (rc) 3394501183f2SStefan Haberland goto out_err; 3395501183f2SStefan Haberland 33962dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 3397501183f2SStefan Haberland if (rc) 3398501183f2SStefan Haberland goto out_err; 3399501183f2SStefan Haberland /* 3400501183f2SStefan Haberland * update unit address configuration and 3401501183f2SStefan Haberland * add device to alias management 3402501183f2SStefan Haberland */ 3403501183f2SStefan Haberland dasd_alias_update_add_device(device); 3404501183f2SStefan Haberland 34052dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 34062dedf0d9SStefan Haberland 34072dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 34082dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 34092dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 34102dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 34112dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 3412501183f2SStefan Haberland else 34132dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 34142dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 34152dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 3416501183f2SStefan Haberland 3417501183f2SStefan Haberland dev_info(&device->cdev->dev, 3418501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 34192dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 3420501183f2SStefan Haberland } 3421501183f2SStefan Haberland return 0; 3422501183f2SStefan Haberland 3423501183f2SStefan Haberland out_err: 3424501183f2SStefan Haberland return -1; 3425501183f2SStefan Haberland } 3426501183f2SStefan Haberland 3427d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 3428d41dd122SStefan Haberland .name = "dasd-eckd", 3429d41dd122SStefan Haberland .owner = THIS_MODULE, 3430d41dd122SStefan Haberland .ids = dasd_eckd_ids, 3431d41dd122SStefan Haberland .probe = dasd_eckd_probe, 3432d41dd122SStefan Haberland .remove = dasd_generic_remove, 3433d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 3434d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 3435d41dd122SStefan Haberland .notify = dasd_generic_notify, 3436d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 3437d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 3438d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 3439d41dd122SStefan Haberland }; 3440f3eb5384SStefan Weinhuber 34411da177e4SLinus Torvalds /* 34421da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 34431da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 34441da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 34451da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 34461da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 34471da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 34481da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 34491da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 34501da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 34511da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 34521da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 34531da177e4SLinus Torvalds */ 34541da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 34551da177e4SLinus Torvalds .owner = THIS_MODULE, 34561da177e4SLinus Torvalds .name = "ECKD", 34571da177e4SLinus Torvalds .ebcname = "ECKD", 34581da177e4SLinus Torvalds .max_blocks = 240, 34591da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 34608e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 34611da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 34628e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 34638e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 34641da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 34651da177e4SLinus Torvalds .start_IO = dasd_start_IO, 34661da177e4SLinus Torvalds .term_IO = dasd_term_IO, 34678e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 34681da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 34691da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 34701da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 34718e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 34728e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 34738e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 34741da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 3475fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 34761da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 34771107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 3478d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 3479d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 3480501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 34812dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 34821da177e4SLinus Torvalds }; 34831da177e4SLinus Torvalds 34841da177e4SLinus Torvalds static int __init 34851da177e4SLinus Torvalds dasd_eckd_init(void) 34861da177e4SLinus Torvalds { 3487736e6ea0SSebastian Ott int ret; 3488736e6ea0SSebastian Ott 34891da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 3490736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 3491736e6ea0SSebastian Ott if (!ret) 3492736e6ea0SSebastian Ott wait_for_device_probe(); 3493736e6ea0SSebastian Ott 3494736e6ea0SSebastian Ott return ret; 34951da177e4SLinus Torvalds } 34961da177e4SLinus Torvalds 34971da177e4SLinus Torvalds static void __exit 34981da177e4SLinus Torvalds dasd_eckd_cleanup(void) 34991da177e4SLinus Torvalds { 35001da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 35011da177e4SLinus Torvalds } 35021da177e4SLinus Torvalds 35031da177e4SLinus Torvalds module_init(dasd_eckd_init); 35041da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 3505