/* * File...........: linux/drivers/s390/block/dasd_eckd.c * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> * Horst Hummel <Horst.Hummel@de.ibm.com> * Carsten Otte <Cotte@de.ibm.com> * Martin Schwidefsky <schwidefsky@de.ibm.com> * Bugreports.to..: <Linux390@de.ibm.com> * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 * */ #include <linux/stddef.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/hdreg.h> /* HDIO_GETGEO */ #include <linux/bio.h> #include <linux/module.h> #include <linux/init.h> #include <asm/debug.h> #include <asm/idals.h> #include <asm/ebcdic.h> #include <asm/io.h> #include <asm/todclk.h> #include <asm/uaccess.h> #include <asm/cio.h> #include <asm/ccwdev.h> #include "dasd_int.h" #include "dasd_eckd.h" #ifdef PRINTK_HEADER #undef PRINTK_HEADER #endif /* PRINTK_HEADER */ #define PRINTK_HEADER "dasd(eckd):" #define ECKD_C0(i) (i->home_bytes) #define ECKD_F(i) (i->formula) #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ (i->factors.f_0x02.f1)) #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ (i->factors.f_0x02.f2)) #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ (i->factors.f_0x02.f3)) #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) #define ECKD_F6(i) (i->factor6) #define ECKD_F7(i) (i->factor7) #define ECKD_F8(i) (i->factor8) MODULE_LICENSE("GPL"); static struct dasd_discipline dasd_eckd_discipline; struct dasd_eckd_private { struct dasd_eckd_characteristics rdc_data; struct dasd_eckd_confdata conf_data; struct dasd_eckd_path path_data; struct eckd_count count_area[5]; int init_cqr_status; int uses_cdl; struct attrib_data_t attrib; /* e.g. cache operations */ }; /* The ccw bus type uses this table to find devices that it sends to * dasd_eckd_probe */ static struct ccw_device_id dasd_eckd_ids[] = { { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, { /* end of list */ }, }; MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); static struct ccw_driver dasd_eckd_driver; /* see below */ /* initial attempt at a probe function. this can be simplified once * the other detection code is gone */ static int dasd_eckd_probe (struct ccw_device *cdev) { int ret; /* set ECKD specific ccw-device options */ ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); if (ret) { printk(KERN_WARNING "dasd_eckd_probe: could not set ccw-device options " "for %s\n", cdev->dev.bus_id); return ret; } ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); return ret; } static int dasd_eckd_set_online(struct ccw_device *cdev) { return dasd_generic_set_online(cdev, &dasd_eckd_discipline); } static struct ccw_driver dasd_eckd_driver = { .name = "dasd-eckd", .owner = THIS_MODULE, .ids = dasd_eckd_ids, .probe = dasd_eckd_probe, .remove = dasd_generic_remove, .set_offline = dasd_generic_set_offline, .set_online = dasd_eckd_set_online, .notify = dasd_generic_notify, }; static const int sizes_trk0[] = { 28, 148, 84 }; #define LABEL_SIZE 140 static inline unsigned int round_up_multiple(unsigned int no, unsigned int mult) { int rem = no % mult; return (rem ? no - rem + mult : no); } static inline unsigned int ceil_quot(unsigned int d1, unsigned int d2) { return (d1 + (d2 - 1)) / d2; } static inline int bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl) { unsigned int fl1, fl2, int1, int2; int bpr; switch (rdc->formula) { case 0x01: fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc)); fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0, ECKD_F1(rdc)); bpr = fl1 + fl2; break; case 0x02: int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl + ECKD_F6(rdc) + ECKD_F4(rdc) * int1, ECKD_F1(rdc)); fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl + ECKD_F6(rdc) + ECKD_F4(rdc) * int2, ECKD_F1(rdc)); bpr = fl1 + fl2; break; default: bpr = 0; break; } return bpr; } static inline unsigned int bytes_per_track(struct dasd_eckd_characteristics *rdc) { return *(unsigned int *) (rdc->byte_per_track) >> 8; } static inline unsigned int recs_per_track(struct dasd_eckd_characteristics * rdc, unsigned int kl, unsigned int dl) { int dn, kn; switch (rdc->dev_type) { case 0x3380: if (kl) return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + ceil_quot(dl + 12, 32)); else return 1499 / (15 + ceil_quot(dl + 12, 32)); case 0x3390: dn = ceil_quot(dl + 6, 232) + 1; if (kl) { kn = ceil_quot(kl + 6, 232) + 1; return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 9 + ceil_quot(dl + 6 * dn, 34)); } else return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); case 0x9345: dn = ceil_quot(dl + 6, 232) + 1; if (kl) { kn = ceil_quot(kl + 6, 232) + 1; return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + ceil_quot(dl + 6 * dn, 34)); } else return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); } return 0; } static inline void check_XRC (struct ccw1 *de_ccw, struct DE_eckd_data *data, struct dasd_device *device) { struct dasd_eckd_private *private; private = (struct dasd_eckd_private *) device->private; /* switch on System Time Stamp - needed for XRC Support */ if (private->rdc_data.facilities.XRC_supported) { data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ data->ep_sys_time = get_clock (); de_ccw->count = sizeof (struct DE_eckd_data); de_ccw->flags |= CCW_FLAG_SLI; } return; } /* end check_XRC */ static inline void define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, int totrk, int cmd, struct dasd_device * device) { struct dasd_eckd_private *private; struct ch_t geo, beg, end; private = (struct dasd_eckd_private *) device->private; ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; ccw->flags = 0; ccw->count = 16; ccw->cda = (__u32) __pa(data); memset(data, 0, sizeof (struct DE_eckd_data)); switch (cmd) { case DASD_ECKD_CCW_READ_HOME_ADDRESS: case DASD_ECKD_CCW_READ_RECORD_ZERO: case DASD_ECKD_CCW_READ: case DASD_ECKD_CCW_READ_MT: case DASD_ECKD_CCW_READ_CKD: case DASD_ECKD_CCW_READ_CKD_MT: case DASD_ECKD_CCW_READ_KD: case DASD_ECKD_CCW_READ_KD_MT: case DASD_ECKD_CCW_READ_COUNT: data->mask.perm = 0x1; data->attributes.operation = private->attrib.operation; break; case DASD_ECKD_CCW_WRITE: case DASD_ECKD_CCW_WRITE_MT: case DASD_ECKD_CCW_WRITE_KD: case DASD_ECKD_CCW_WRITE_KD_MT: data->mask.perm = 0x02; data->attributes.operation = private->attrib.operation; check_XRC (ccw, data, device); break; case DASD_ECKD_CCW_WRITE_CKD: case DASD_ECKD_CCW_WRITE_CKD_MT: data->attributes.operation = DASD_BYPASS_CACHE; check_XRC (ccw, data, device); break; case DASD_ECKD_CCW_ERASE: case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: case DASD_ECKD_CCW_WRITE_RECORD_ZERO: data->mask.perm = 0x3; data->mask.auth = 0x1; data->attributes.operation = DASD_BYPASS_CACHE; check_XRC (ccw, data, device); break; default: DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); break; } data->attributes.mode = 0x3; /* ECKD */ if ((private->rdc_data.cu_type == 0x2105 || private->rdc_data.cu_type == 0x2107 || private->rdc_data.cu_type == 0x1750) && !(private->uses_cdl && trk < 2)) data->ga_extended |= 0x40; /* Regular Data Format Mode */ geo.cyl = private->rdc_data.no_cyl; geo.head = private->rdc_data.trk_per_cyl; beg.cyl = trk / geo.head; beg.head = trk % geo.head; end.cyl = totrk / geo.head; end.head = totrk % geo.head; /* check for sequential prestage - enhance cylinder range */ if (data->attributes.operation == DASD_SEQ_PRESTAGE || data->attributes.operation == DASD_SEQ_ACCESS) { if (end.cyl + private->attrib.nr_cyl < geo.cyl) end.cyl += private->attrib.nr_cyl; else end.cyl = (geo.cyl - 1); } data->beg_ext.cyl = beg.cyl; data->beg_ext.head = beg.head; data->end_ext.cyl = end.cyl; data->end_ext.head = end.head; } static inline void locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, int rec_on_trk, int no_rec, int cmd, struct dasd_device * device, int reclen) { struct dasd_eckd_private *private; int sector; int dn, d; private = (struct dasd_eckd_private *) device->private; DBF_DEV_EVENT(DBF_INFO, device, "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", trk, rec_on_trk, no_rec, cmd, reclen); ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; ccw->flags = 0; ccw->count = 16; ccw->cda = (__u32) __pa(data); memset(data, 0, sizeof (struct LO_eckd_data)); sector = 0; if (rec_on_trk) { switch (private->rdc_data.dev_type) { case 0x3390: dn = ceil_quot(reclen + 6, 232); d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; break; case 0x3380: d = 7 + ceil_quot(reclen + 12, 32); sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; break; } } data->sector = sector; data->count = no_rec; switch (cmd) { case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: data->operation.orientation = 0x3; data->operation.operation = 0x03; break; case DASD_ECKD_CCW_READ_HOME_ADDRESS: data->operation.orientation = 0x3; data->operation.operation = 0x16; break; case DASD_ECKD_CCW_WRITE_RECORD_ZERO: data->operation.orientation = 0x1; data->operation.operation = 0x03; data->count++; break; case DASD_ECKD_CCW_READ_RECORD_ZERO: data->operation.orientation = 0x3; data->operation.operation = 0x16; data->count++; break; case DASD_ECKD_CCW_WRITE: case DASD_ECKD_CCW_WRITE_MT: case DASD_ECKD_CCW_WRITE_KD: case DASD_ECKD_CCW_WRITE_KD_MT: data->auxiliary.last_bytes_used = 0x1; data->length = reclen; data->operation.operation = 0x01; break; case DASD_ECKD_CCW_WRITE_CKD: case DASD_ECKD_CCW_WRITE_CKD_MT: data->auxiliary.last_bytes_used = 0x1; data->length = reclen; data->operation.operation = 0x03; break; case DASD_ECKD_CCW_READ: case DASD_ECKD_CCW_READ_MT: case DASD_ECKD_CCW_READ_KD: case DASD_ECKD_CCW_READ_KD_MT: data->auxiliary.last_bytes_used = 0x1; data->length = reclen; data->operation.operation = 0x06; break; case DASD_ECKD_CCW_READ_CKD: case DASD_ECKD_CCW_READ_CKD_MT: data->auxiliary.last_bytes_used = 0x1; data->length = reclen; data->operation.operation = 0x16; break; case DASD_ECKD_CCW_READ_COUNT: data->operation.operation = 0x06; break; case DASD_ECKD_CCW_ERASE: data->length = reclen; data->auxiliary.last_bytes_used = 0x1; data->operation.operation = 0x0b; break; default: DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); } data->seek_addr.cyl = data->search_arg.cyl = trk / private->rdc_data.trk_per_cyl; data->seek_addr.head = data->search_arg.head = trk % private->rdc_data.trk_per_cyl; data->search_arg.record = rec_on_trk; } /* * Returns 1 if the block is one of the special blocks that needs * to get read/written with the KD variant of the command. * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. * Luckily the KD variants differ only by one bit (0x08) from the * normal variant. So don't wonder about code like: * if (dasd_eckd_cdl_special(blk_per_trk, recid)) * ccw->cmd_code |= 0x8; */ static inline int dasd_eckd_cdl_special(int blk_per_trk, int recid) { if (recid < 3) return 1; if (recid < blk_per_trk) return 0; if (recid < 2 * blk_per_trk) return 1; return 0; } /* * Returns the record size for the special blocks of the cdl format. * Only returns something useful if dasd_eckd_cdl_special is true * for the recid. */ static inline int dasd_eckd_cdl_reclen(int recid) { if (recid < 3) return sizes_trk0[recid]; return LABEL_SIZE; } /* * Generate device unique id that specifies the physical device. */ static int dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) { struct dasd_eckd_private *private; struct dasd_eckd_confdata *confdata; private = (struct dasd_eckd_private *) device->private; if (!private) return -ENODEV; confdata = &private->conf_data; if (!confdata) return -ENODEV; memset(uid, 0, sizeof(struct dasd_uid)); memcpy(uid->vendor, confdata->ned1.HDA_manufacturer, sizeof(uid->vendor) - 1); EBCASC(uid->vendor, sizeof(uid->vendor) - 1); memcpy(uid->serial, confdata->ned1.HDA_location, sizeof(uid->serial) - 1); EBCASC(uid->serial, sizeof(uid->serial) - 1); uid->ssid = confdata->neq.subsystemID; if (confdata->ned2.sneq.flags == 0x40) { uid->alias = 1; uid->unit_addr = confdata->ned2.sneq.base_unit_addr; } else uid->unit_addr = confdata->ned1.unit_addr; return 0; } static int dasd_eckd_read_conf(struct dasd_device *device) { void *conf_data; int conf_len, conf_data_saved; int rc; __u8 lpm; struct dasd_eckd_private *private; struct dasd_eckd_path *path_data; private = (struct dasd_eckd_private *) device->private; path_data = (struct dasd_eckd_path *) &private->path_data; path_data->opm = ccw_device_get_path_mask(device->cdev); lpm = 0x80; conf_data_saved = 0; /* get configuration data per operational path */ for (lpm = 0x80; lpm; lpm>>= 1) { if (lpm & path_data->opm){ rc = read_conf_data_lpm(device->cdev, &conf_data, &conf_len, lpm); if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ MESSAGE(KERN_WARNING, "Read configuration data returned " "error %d", rc); return rc; } if (conf_data == NULL) { MESSAGE(KERN_WARNING, "%s", "No configuration " "data retrieved"); continue; /* no errror */ } if (conf_len != sizeof (struct dasd_eckd_confdata)) { MESSAGE(KERN_WARNING, "sizes of configuration data mismatch" "%d (read) vs %ld (expected)", conf_len, sizeof (struct dasd_eckd_confdata)); kfree(conf_data); continue; /* no errror */ } /* save first valid configuration data */ if (!conf_data_saved){ memcpy(&private->conf_data, conf_data, sizeof (struct dasd_eckd_confdata)); conf_data_saved++; } switch (((char *)conf_data)[242] & 0x07){ case 0x02: path_data->npm |= lpm; break; case 0x03: path_data->ppm |= lpm; break; } kfree(conf_data); } } return 0; } /* * Build CP for Perform Subsystem Function - SSC. */ struct dasd_ccw_req * dasd_eckd_build_psf_ssc(struct dasd_device *device) { struct dasd_ccw_req *cqr; struct dasd_psf_ssc_data *psf_ssc_data; struct ccw1 *ccw; cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , sizeof(struct dasd_psf_ssc_data), device); if (IS_ERR(cqr)) { DEV_MESSAGE(KERN_WARNING, device, "%s", "Could not allocate PSF-SSC request"); return cqr; } psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; psf_ssc_data->order = PSF_ORDER_SSC; psf_ssc_data->suborder = 0x08; ccw = cqr->cpaddr; ccw->cmd_code = DASD_ECKD_CCW_PSF; ccw->cda = (__u32)(addr_t)psf_ssc_data; ccw->count = 66; cqr->device = device; cqr->expires = 10*HZ; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; return cqr; } /* * Perform Subsystem Function. * It is necessary to trigger CIO for channel revalidation since this * call might change behaviour of DASD devices. */ static int dasd_eckd_psf_ssc(struct dasd_device *device) { struct dasd_ccw_req *cqr; int rc; cqr = dasd_eckd_build_psf_ssc(device); if (IS_ERR(cqr)) return PTR_ERR(cqr); rc = dasd_sleep_on(cqr); if (!rc) /* trigger CIO to reprobe devices */ css_schedule_reprobe(); dasd_sfree_request(cqr, cqr->device); return rc; } /* * Valide storage server of current device. */ static int dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid) { int rc; /* Currently PAV is the only reason to 'validate' server on LPAR */ if (dasd_nopav || MACHINE_IS_VM) return 0; rc = dasd_eckd_psf_ssc(device); /* may be requested feature is not available on server, * therefore just report error and go ahead */ DEV_MESSAGE(KERN_INFO, device, "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", uid->vendor, uid->serial, uid->ssid, rc); /* RE-Read Configuration Data */ return dasd_eckd_read_conf(device); } /* * Check device characteristics. * If the device is accessible using ECKD discipline, the device is enabled. */ static int dasd_eckd_check_characteristics(struct dasd_device *device) { struct dasd_eckd_private *private; struct dasd_uid uid; void *rdc_data; int rc; private = (struct dasd_eckd_private *) device->private; if (private == NULL) { private = kzalloc(sizeof(struct dasd_eckd_private), GFP_KERNEL | GFP_DMA); if (private == NULL) { DEV_MESSAGE(KERN_WARNING, device, "%s", "memory allocation failed for private " "data"); return -ENOMEM; } device->private = (void *) private; } /* Invalidate status of initial analysis. */ private->init_cqr_status = -1; /* Set default cache operations. */ private->attrib.operation = DASD_NORMAL_CACHE; private->attrib.nr_cyl = 0; /* Read Configuration Data */ rc = dasd_eckd_read_conf(device); if (rc) return rc; /* Generate device unique id and register in devmap */ rc = dasd_eckd_generate_uid(device, &uid); if (rc) return rc; rc = dasd_set_uid(device->cdev, &uid); if (rc == 1) /* new server found */ rc = dasd_eckd_validate_server(device, &uid); if (rc) return rc; /* Read Device Characteristics */ rdc_data = (void *) &(private->rdc_data); memset(rdc_data, 0, sizeof(rdc_data)); rc = read_dev_chars(device->cdev, &rdc_data, 64); if (rc) DEV_MESSAGE(KERN_WARNING, device, "Read device characteristics returned " "rc=%d", rc); DEV_MESSAGE(KERN_INFO, device, "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", private->rdc_data.dev_type, private->rdc_data.dev_model, private->rdc_data.cu_type, private->rdc_data.cu_model.model, private->rdc_data.no_cyl, private->rdc_data.trk_per_cyl, private->rdc_data.sec_per_trk); return rc; } static struct dasd_ccw_req * dasd_eckd_analysis_ccw(struct dasd_device *device) { struct dasd_eckd_private *private; struct eckd_count *count_data; struct LO_eckd_data *LO_data; struct dasd_ccw_req *cqr; struct ccw1 *ccw; int cplength, datasize; int i; private = (struct dasd_eckd_private *) device->private; cplength = 8; datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); cqr = dasd_smalloc_request(dasd_eckd_discipline.name, cplength, datasize, device); if (IS_ERR(cqr)) return cqr; ccw = cqr->cpaddr; /* Define extent for the first 3 tracks. */ define_extent(ccw++, cqr->data, 0, 2, DASD_ECKD_CCW_READ_COUNT, device); LO_data = cqr->data + sizeof (struct DE_eckd_data); /* Locate record for the first 4 records on track 0. */ ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, LO_data++, 0, 0, 4, DASD_ECKD_CCW_READ_COUNT, device, 0); count_data = private->count_area; for (i = 0; i < 4; i++) { ccw[-1].flags |= CCW_FLAG_CC; ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; ccw->flags = 0; ccw->count = 8; ccw->cda = (__u32)(addr_t) count_data; ccw++; count_data++; } /* Locate record for the first record on track 2. */ ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, LO_data++, 2, 0, 1, DASD_ECKD_CCW_READ_COUNT, device, 0); /* Read count ccw. */ ccw[-1].flags |= CCW_FLAG_CC; ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; ccw->flags = 0; ccw->count = 8; ccw->cda = (__u32)(addr_t) count_data; cqr->device = device; cqr->retries = 0; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; return cqr; } /* * This is the callback function for the init_analysis cqr. It saves * the status of the initial analysis ccw before it frees it and kicks * the device to continue the startup sequence. This will call * dasd_eckd_do_analysis again (if the devices has not been marked * for deletion in the meantime). */ static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) { struct dasd_eckd_private *private; struct dasd_device *device; device = init_cqr->device; private = (struct dasd_eckd_private *) device->private; private->init_cqr_status = init_cqr->status; dasd_sfree_request(init_cqr, device); dasd_kick_device(device); } static int dasd_eckd_start_analysis(struct dasd_device *device) { struct dasd_eckd_private *private; struct dasd_ccw_req *init_cqr; private = (struct dasd_eckd_private *) device->private; init_cqr = dasd_eckd_analysis_ccw(device); if (IS_ERR(init_cqr)) return PTR_ERR(init_cqr); init_cqr->callback = dasd_eckd_analysis_callback; init_cqr->callback_data = NULL; init_cqr->expires = 5*HZ; dasd_add_request_head(init_cqr); return -EAGAIN; } static int dasd_eckd_end_analysis(struct dasd_device *device) { struct dasd_eckd_private *private; struct eckd_count *count_area; unsigned int sb, blk_per_trk; int status, i; private = (struct dasd_eckd_private *) device->private; status = private->init_cqr_status; private->init_cqr_status = -1; if (status != DASD_CQR_DONE) { DEV_MESSAGE(KERN_WARNING, device, "%s", "volume analysis returned unformatted disk"); return -EMEDIUMTYPE; } private->uses_cdl = 1; /* Calculate number of blocks/records per track. */ blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); /* Check Track 0 for Compatible Disk Layout */ count_area = NULL; for (i = 0; i < 3; i++) { if (private->count_area[i].kl != 4 || private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { private->uses_cdl = 0; break; } } if (i == 3) count_area = &private->count_area[4]; if (private->uses_cdl == 0) { for (i = 0; i < 5; i++) { if ((private->count_area[i].kl != 0) || (private->count_area[i].dl != private->count_area[0].dl)) break; } if (i == 5) count_area = &private->count_area[0]; } else { if (private->count_area[3].record == 1) DEV_MESSAGE(KERN_WARNING, device, "%s", "Trk 0: no records after VTOC!"); } if (count_area != NULL && count_area->kl == 0) { /* we found notthing violating our disk layout */ if (dasd_check_blocksize(count_area->dl) == 0) device->bp_block = count_area->dl; } if (device->bp_block == 0) { DEV_MESSAGE(KERN_WARNING, device, "%s", "Volume has incompatible disk layout"); return -EMEDIUMTYPE; } device->s2b_shift = 0; /* bits to shift 512 to get a block */ for (sb = 512; sb < device->bp_block; sb = sb << 1) device->s2b_shift++; blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); device->blocks = (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl * blk_per_trk); DEV_MESSAGE(KERN_INFO, device, "(%dkB blks): %dkB at %dkB/trk %s", (device->bp_block >> 10), ((private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl * blk_per_trk * (device->bp_block >> 9)) >> 1), ((blk_per_trk * device->bp_block) >> 10), private->uses_cdl ? "compatible disk layout" : "linux disk layout"); return 0; } static int dasd_eckd_do_analysis(struct dasd_device *device) { struct dasd_eckd_private *private; private = (struct dasd_eckd_private *) device->private; if (private->init_cqr_status < 0) return dasd_eckd_start_analysis(device); else return dasd_eckd_end_analysis(device); } static int dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) { struct dasd_eckd_private *private; private = (struct dasd_eckd_private *) device->private; if (dasd_check_blocksize(device->bp_block) == 0) { geo->sectors = recs_per_track(&private->rdc_data, 0, device->bp_block); } geo->cylinders = private->rdc_data.no_cyl; geo->heads = private->rdc_data.trk_per_cyl; return 0; } static struct dasd_ccw_req * dasd_eckd_format_device(struct dasd_device * device, struct format_data_t * fdata) { struct dasd_eckd_private *private; struct dasd_ccw_req *fcp; struct eckd_count *ect; struct ccw1 *ccw; void *data; int rpt, cyl, head; int cplength, datasize; int i; private = (struct dasd_eckd_private *) device->private; rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; head = fdata->start_unit % private->rdc_data.trk_per_cyl; /* Sanity checks. */ if (fdata->start_unit >= (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", fdata->start_unit); return ERR_PTR(-EINVAL); } if (fdata->start_unit > fdata->stop_unit) { DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", fdata->start_unit); return ERR_PTR(-EINVAL); } if (dasd_check_blocksize(fdata->blksize) != 0) { DEV_MESSAGE(KERN_WARNING, device, "Invalid blocksize %d...terminating!", fdata->blksize); return ERR_PTR(-EINVAL); } /* * fdata->intensity is a bit string that tells us what to do: * Bit 0: write record zero * Bit 1: write home address, currently not supported * Bit 2: invalidate tracks * Bit 3: use OS/390 compatible disk layout (cdl) * Only some bit combinations do make sense. */ switch (fdata->intensity) { case 0x00: /* Normal format */ case 0x08: /* Normal format, use cdl. */ cplength = 2 + rpt; datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + rpt * sizeof(struct eckd_count); break; case 0x01: /* Write record zero and format track. */ case 0x09: /* Write record zero and format track, use cdl. */ cplength = 3 + rpt; datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + sizeof(struct eckd_count) + rpt * sizeof(struct eckd_count); break; case 0x04: /* Invalidate track. */ case 0x0c: /* Invalidate track, use cdl. */ cplength = 3; datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + sizeof(struct eckd_count); break; default: DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", fdata->intensity); return ERR_PTR(-EINVAL); } /* Allocate the format ccw request. */ fcp = dasd_smalloc_request(dasd_eckd_discipline.name, cplength, datasize, device); if (IS_ERR(fcp)) return fcp; data = fcp->data; ccw = fcp->cpaddr; switch (fdata->intensity & ~0x08) { case 0x00: /* Normal format. */ define_extent(ccw++, (struct DE_eckd_data *) data, fdata->start_unit, fdata->start_unit, DASD_ECKD_CCW_WRITE_CKD, device); data += sizeof(struct DE_eckd_data); ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, (struct LO_eckd_data *) data, fdata->start_unit, 0, rpt, DASD_ECKD_CCW_WRITE_CKD, device, fdata->blksize); data += sizeof(struct LO_eckd_data); break; case 0x01: /* Write record zero + format track. */ define_extent(ccw++, (struct DE_eckd_data *) data, fdata->start_unit, fdata->start_unit, DASD_ECKD_CCW_WRITE_RECORD_ZERO, device); data += sizeof(struct DE_eckd_data); ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, (struct LO_eckd_data *) data, fdata->start_unit, 0, rpt + 1, DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, device->bp_block); data += sizeof(struct LO_eckd_data); break; case 0x04: /* Invalidate track. */ define_extent(ccw++, (struct DE_eckd_data *) data, fdata->start_unit, fdata->start_unit, DASD_ECKD_CCW_WRITE_CKD, device); data += sizeof(struct DE_eckd_data); ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, (struct LO_eckd_data *) data, fdata->start_unit, 0, 1, DASD_ECKD_CCW_WRITE_CKD, device, 8); data += sizeof(struct LO_eckd_data); break; } if (fdata->intensity & 0x01) { /* write record zero */ ect = (struct eckd_count *) data; data += sizeof(struct eckd_count); ect->cyl = cyl; ect->head = head; ect->record = 0; ect->kl = 0; ect->dl = 8; ccw[-1].flags |= CCW_FLAG_CC; ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; ccw->flags = CCW_FLAG_SLI; ccw->count = 8; ccw->cda = (__u32)(addr_t) ect; ccw++; } if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ ect = (struct eckd_count *) data; data += sizeof(struct eckd_count); ect->cyl = cyl; ect->head = head; ect->record = 1; ect->kl = 0; ect->dl = 0; ccw[-1].flags |= CCW_FLAG_CC; ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; ccw->flags = CCW_FLAG_SLI; ccw->count = 8; ccw->cda = (__u32)(addr_t) ect; } else { /* write remaining records */ for (i = 0; i < rpt; i++) { ect = (struct eckd_count *) data; data += sizeof(struct eckd_count); ect->cyl = cyl; ect->head = head; ect->record = i + 1; ect->kl = 0; ect->dl = fdata->blksize; /* Check for special tracks 0-1 when formatting CDL */ if ((fdata->intensity & 0x08) && fdata->start_unit == 0) { if (i < 3) { ect->kl = 4; ect->dl = sizes_trk0[i] - 4; } } if ((fdata->intensity & 0x08) && fdata->start_unit == 1) { ect->kl = 44; ect->dl = LABEL_SIZE - 44; } ccw[-1].flags |= CCW_FLAG_CC; ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; ccw->flags = CCW_FLAG_SLI; ccw->count = 8; ccw->cda = (__u32)(addr_t) ect; ccw++; } } fcp->device = device; fcp->retries = 2; /* set retry counter to enable ERP */ fcp->buildclk = get_clock(); fcp->status = DASD_CQR_FILLED; return fcp; } static dasd_era_t dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) { struct dasd_device *device = (struct dasd_device *) cqr->device; struct ccw_device *cdev = device->cdev; if (irb->scsw.cstat == 0x00 && irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) return dasd_era_none; switch (cdev->id.cu_type) { case 0x3990: case 0x2105: case 0x2107: case 0x1750: return dasd_3990_erp_examine(cqr, irb); case 0x9343: return dasd_9343_erp_examine(cqr, irb); case 0x3880: default: DEV_MESSAGE(KERN_WARNING, device, "%s", "default (unknown CU type) - RECOVERABLE return"); return dasd_era_recover; } } static dasd_erp_fn_t dasd_eckd_erp_action(struct dasd_ccw_req * cqr) { struct dasd_device *device = (struct dasd_device *) cqr->device; struct ccw_device *cdev = device->cdev; switch (cdev->id.cu_type) { case 0x3990: case 0x2105: case 0x2107: case 0x1750: return dasd_3990_erp_action; case 0x9343: case 0x3880: default: return dasd_default_erp_action; } } static dasd_erp_fn_t dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) { return dasd_default_erp_postaction; } static struct dasd_ccw_req * dasd_eckd_build_cp(struct dasd_device * device, struct request *req) { struct dasd_eckd_private *private; unsigned long *idaws; struct LO_eckd_data *LO_data; struct dasd_ccw_req *cqr; struct ccw1 *ccw; struct bio *bio; struct bio_vec *bv; char *dst; unsigned int blksize, blk_per_trk, off; int count, cidaw, cplength, datasize; sector_t recid, first_rec, last_rec; sector_t first_trk, last_trk; unsigned int first_offs, last_offs; unsigned char cmd, rcmd; int i; private = (struct dasd_eckd_private *) device->private; if (rq_data_dir(req) == READ) cmd = DASD_ECKD_CCW_READ_MT; else if (rq_data_dir(req) == WRITE) cmd = DASD_ECKD_CCW_WRITE_MT; else return ERR_PTR(-EINVAL); /* Calculate number of blocks/records per track. */ blksize = device->bp_block; blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); /* Calculate record id of first and last block. */ first_rec = first_trk = req->sector >> device->s2b_shift; first_offs = sector_div(first_trk, blk_per_trk); last_rec = last_trk = (req->sector + req->nr_sectors - 1) >> device->s2b_shift; last_offs = sector_div(last_trk, blk_per_trk); /* Check struct bio and count the number of blocks for the request. */ count = 0; cidaw = 0; rq_for_each_bio(bio, req) { bio_for_each_segment(bv, bio, i) { if (bv->bv_len & (blksize - 1)) /* Eckd can only do full blocks. */ return ERR_PTR(-EINVAL); count += bv->bv_len >> (device->s2b_shift + 9); #if defined(CONFIG_64BIT) if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) cidaw += bv->bv_len >> (device->s2b_shift + 9); #endif } } /* Paranoia. */ if (count != last_rec - first_rec + 1) return ERR_PTR(-EINVAL); /* 1x define extent + 1x locate record + number of blocks */ cplength = 2 + count; /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + cidaw * sizeof(unsigned long); /* Find out the number of additional locate record ccws for cdl. */ if (private->uses_cdl && first_rec < 2*blk_per_trk) { if (last_rec >= 2*blk_per_trk) count = 2*blk_per_trk - first_rec; cplength += count; datasize += count*sizeof(struct LO_eckd_data); } /* Allocate the ccw request. */ cqr = dasd_smalloc_request(dasd_eckd_discipline.name, cplength, datasize, device); if (IS_ERR(cqr)) return cqr; ccw = cqr->cpaddr; /* First ccw is define extent. */ define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device); /* Build locate_record+read/write/ccws. */ idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); LO_data = (struct LO_eckd_data *) (idaws + cidaw); recid = first_rec; if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { /* Only standard blocks so there is just one locate record. */ ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, LO_data++, first_trk, first_offs + 1, last_rec - recid + 1, cmd, device, blksize); } rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { dst = page_address(bv->bv_page) + bv->bv_offset; if (dasd_page_cache) { char *copy = kmem_cache_alloc(dasd_page_cache, SLAB_DMA | __GFP_NOWARN); if (copy && rq_data_dir(req) == WRITE) memcpy(copy + bv->bv_offset, dst, bv->bv_len); if (copy) dst = copy + bv->bv_offset; } for (off = 0; off < bv->bv_len; off += blksize) { sector_t trkid = recid; unsigned int recoffs = sector_div(trkid, blk_per_trk); rcmd = cmd; count = blksize; /* Locate record for cdl special block ? */ if (private->uses_cdl && recid < 2*blk_per_trk) { if (dasd_eckd_cdl_special(blk_per_trk, recid)){ rcmd |= 0x8; count = dasd_eckd_cdl_reclen(recid); if (count < blksize && rq_data_dir(req) == READ) memset(dst + count, 0xe5, blksize - count); } ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, LO_data++, trkid, recoffs + 1, 1, rcmd, device, count); } /* Locate record for standard blocks ? */ if (private->uses_cdl && recid == 2*blk_per_trk) { ccw[-1].flags |= CCW_FLAG_CC; locate_record(ccw++, LO_data++, trkid, recoffs + 1, last_rec - recid + 1, cmd, device, count); } /* Read/write ccw. */ ccw[-1].flags |= CCW_FLAG_CC; ccw->cmd_code = rcmd; ccw->count = count; if (idal_is_needed(dst, blksize)) { ccw->cda = (__u32)(addr_t) idaws; ccw->flags = CCW_FLAG_IDA; idaws = idal_create_words(idaws, dst, blksize); } else { ccw->cda = (__u32)(addr_t) dst; ccw->flags = 0; } ccw++; dst += blksize; recid++; } } if (req->flags & REQ_FAILFAST) set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->device = device; cqr->expires = 5 * 60 * HZ; /* 5 minutes */ cqr->lpm = private->path_data.ppm; cqr->retries = 256; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; return cqr; } static int dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) { struct dasd_eckd_private *private; struct ccw1 *ccw; struct bio *bio; struct bio_vec *bv; char *dst, *cda; unsigned int blksize, blk_per_trk, off; sector_t recid; int i, status; if (!dasd_page_cache) goto out; private = (struct dasd_eckd_private *) cqr->device->private; blksize = cqr->device->bp_block; blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); recid = req->sector >> cqr->device->s2b_shift; ccw = cqr->cpaddr; /* Skip over define extent & locate record. */ ccw++; if (private->uses_cdl == 0 || recid > 2*blk_per_trk) ccw++; rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { dst = page_address(bv->bv_page) + bv->bv_offset; for (off = 0; off < bv->bv_len; off += blksize) { /* Skip locate record. */ if (private->uses_cdl && recid <= 2*blk_per_trk) ccw++; if (dst) { if (ccw->flags & CCW_FLAG_IDA) cda = *((char **)((addr_t) ccw->cda)); else cda = (char *)((addr_t) ccw->cda); if (dst != cda) { if (rq_data_dir(req) == READ) memcpy(dst, cda, bv->bv_len); kmem_cache_free(dasd_page_cache, (void *)((addr_t)cda & PAGE_MASK)); } dst = NULL; } ccw++; recid++; } } out: status = cqr->status == DASD_CQR_DONE; dasd_sfree_request(cqr, cqr->device); return status; } static int dasd_eckd_fill_info(struct dasd_device * device, struct dasd_information2_t * info) { struct dasd_eckd_private *private; private = (struct dasd_eckd_private *) device->private; info->label_block = 2; info->FBA_layout = private->uses_cdl ? 0 : 1; info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; info->characteristics_size = sizeof(struct dasd_eckd_characteristics); memcpy(info->characteristics, &private->rdc_data, sizeof(struct dasd_eckd_characteristics)); info->confdata_size = sizeof (struct dasd_eckd_confdata); memcpy(info->configuration_data, &private->conf_data, sizeof (struct dasd_eckd_confdata)); return 0; } /* * SECTION: ioctl functions for eckd devices. */ /* * Release device ioctl. * Buils a channel programm to releases a prior reserved * (see dasd_eckd_reserve) device. */ static int dasd_eckd_release(struct dasd_device *device) { struct dasd_ccw_req *cqr; int rc; if (!capable(CAP_SYS_ADMIN)) return -EACCES; cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1, 32, device); if (IS_ERR(cqr)) { DEV_MESSAGE(KERN_WARNING, device, "%s", "Could not allocate initialization request"); return PTR_ERR(cqr); } cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; cqr->cpaddr->flags |= CCW_FLAG_SLI; cqr->cpaddr->count = 32; cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; cqr->device = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 0; cqr->expires = 2 * HZ; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; rc = dasd_sleep_on_immediatly(cqr); dasd_sfree_request(cqr, cqr->device); return rc; } /* * Reserve device ioctl. * Options are set to 'synchronous wait for interrupt' and * 'timeout the request'. This leads to a terminate IO if * the interrupt is outstanding for a certain time. */ static int dasd_eckd_reserve(struct dasd_device *device) { struct dasd_ccw_req *cqr; int rc; if (!capable(CAP_SYS_ADMIN)) return -EACCES; cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1, 32, device); if (IS_ERR(cqr)) { DEV_MESSAGE(KERN_WARNING, device, "%s", "Could not allocate initialization request"); return PTR_ERR(cqr); } cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; cqr->cpaddr->flags |= CCW_FLAG_SLI; cqr->cpaddr->count = 32; cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; cqr->device = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 0; cqr->expires = 2 * HZ; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; rc = dasd_sleep_on_immediatly(cqr); dasd_sfree_request(cqr, cqr->device); return rc; } /* * Steal lock ioctl - unconditional reserve device. * Buils a channel programm to break a device's reservation. * (unconditional reserve) */ static int dasd_eckd_steal_lock(struct dasd_device *device) { struct dasd_ccw_req *cqr; int rc; if (!capable(CAP_SYS_ADMIN)) return -EACCES; cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1, 32, device); if (IS_ERR(cqr)) { DEV_MESSAGE(KERN_WARNING, device, "%s", "Could not allocate initialization request"); return PTR_ERR(cqr); } cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; cqr->cpaddr->flags |= CCW_FLAG_SLI; cqr->cpaddr->count = 32; cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; cqr->device = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); cqr->retries = 0; cqr->expires = 2 * HZ; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; rc = dasd_sleep_on_immediatly(cqr); dasd_sfree_request(cqr, cqr->device); return rc; } /* * Read performance statistics */ static int dasd_eckd_performance(struct dasd_device *device, void __user *argp) { struct dasd_psf_prssd_data *prssdp; struct dasd_rssd_perf_stats_t *stats; struct dasd_ccw_req *cqr; struct ccw1 *ccw; int rc; cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 1 /* PSF */ + 1 /* RSSD */ , (sizeof (struct dasd_psf_prssd_data) + sizeof (struct dasd_rssd_perf_stats_t)), device); if (IS_ERR(cqr)) { DEV_MESSAGE(KERN_WARNING, device, "%s", "Could not allocate initialization request"); return PTR_ERR(cqr); } cqr->device = device; cqr->retries = 0; cqr->expires = 10 * HZ; /* Prepare for Read Subsystem Data */ prssdp = (struct dasd_psf_prssd_data *) cqr->data; memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); prssdp->order = PSF_ORDER_PRSSD; prssdp->suborder = 0x01; /* Perfomance Statistics */ prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ ccw = cqr->cpaddr; ccw->cmd_code = DASD_ECKD_CCW_PSF; ccw->count = sizeof (struct dasd_psf_prssd_data); ccw->flags |= CCW_FLAG_CC; ccw->cda = (__u32)(addr_t) prssdp; /* Read Subsystem Data - Performance Statistics */ stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); ccw++; ccw->cmd_code = DASD_ECKD_CCW_RSSD; ccw->count = sizeof (struct dasd_rssd_perf_stats_t); ccw->cda = (__u32)(addr_t) stats; cqr->buildclk = get_clock(); cqr->status = DASD_CQR_FILLED; rc = dasd_sleep_on(cqr); if (rc == 0) { /* Prepare for Read Subsystem Data */ prssdp = (struct dasd_psf_prssd_data *) cqr->data; stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); if (copy_to_user(argp, stats, sizeof(struct dasd_rssd_perf_stats_t))) rc = -EFAULT; } dasd_sfree_request(cqr, cqr->device); return rc; } /* * Get attributes (cache operations) * Returnes the cache attributes used in Define Extend (DE). */ static int dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) { struct dasd_eckd_private *private = (struct dasd_eckd_private *)device->private; struct attrib_data_t attrib = private->attrib; int rc; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (!argp) return -EINVAL; rc = 0; if (copy_to_user(argp, (long *) &attrib, sizeof (struct attrib_data_t))) rc = -EFAULT; return rc; } /* * Set attributes (cache operations) * Stores the attributes for cache operation to be used in Define Extend (DE). */ static int dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) { struct dasd_eckd_private *private = (struct dasd_eckd_private *)device->private; struct attrib_data_t attrib; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (!argp) return -EINVAL; if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) return -EFAULT; private->attrib = attrib; DEV_MESSAGE(KERN_INFO, device, "cache operation mode set to %x (%i cylinder prestage)", private->attrib.operation, private->attrib.nr_cyl); return 0; } static int dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) { switch (cmd) { case BIODASDGATTR: return dasd_eckd_get_attrib(device, argp); case BIODASDSATTR: return dasd_eckd_set_attrib(device, argp); case BIODASDPSRD: return dasd_eckd_performance(device, argp); case BIODASDRLSE: return dasd_eckd_release(device); case BIODASDRSRV: return dasd_eckd_reserve(device); case BIODASDSLCK: return dasd_eckd_steal_lock(device); default: return -ENOIOCTLCMD; } } /* * Dump the range of CCWs into 'page' buffer * and return number of printed chars. */ static inline int dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) { int len, count; char *datap; len = 0; while (from <= to) { len += sprintf(page + len, KERN_ERR PRINTK_HEADER " CCW %p: %08X %08X DAT:", from, ((int *) from)[0], ((int *) from)[1]); /* get pointer to data (consider IDALs) */ if (from->flags & CCW_FLAG_IDA) datap = (char *) *((addr_t *) (addr_t) from->cda); else datap = (char *) ((addr_t) from->cda); /* dump data (max 32 bytes) */ for (count = 0; count < from->count && count < 32; count++) { if (count % 8 == 0) len += sprintf(page + len, " "); if (count % 4 == 0) len += sprintf(page + len, " "); len += sprintf(page + len, "%02x", datap[count]); } len += sprintf(page + len, "\n"); from++; } return len; } /* * Print sense data and related channel program. * Parts are printed because printk buffer is only 1024 bytes. */ static void dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, struct irb *irb) { char *page; struct ccw1 *first, *last, *fail, *from, *to; int len, sl, sct; page = (char *) get_zeroed_page(GFP_ATOMIC); if (page == NULL) { DEV_MESSAGE(KERN_ERR, device, " %s", "No memory to dump sense data"); return; } /* dump the sense data */ len = sprintf(page, KERN_ERR PRINTK_HEADER " I/O status report for device %s:\n", device->cdev->dev.bus_id); len += sprintf(page + len, KERN_ERR PRINTK_HEADER " in req: %p CS: 0x%02X DS: 0x%02X\n", req, irb->scsw.cstat, irb->scsw.dstat); len += sprintf(page + len, KERN_ERR PRINTK_HEADER " device %s: Failing CCW: %p\n", device->cdev->dev.bus_id, (void *) (addr_t) irb->scsw.cpa); if (irb->esw.esw0.erw.cons) { for (sl = 0; sl < 4; sl++) { len += sprintf(page + len, KERN_ERR PRINTK_HEADER " Sense(hex) %2d-%2d:", (8 * sl), ((8 * sl) + 7)); for (sct = 0; sct < 8; sct++) { len += sprintf(page + len, " %02x", irb->ecw[8 * sl + sct]); } len += sprintf(page + len, "\n"); } if (irb->ecw[27] & DASD_SENSE_BIT_0) { /* 24 Byte Sense Data */ sprintf(page + len, KERN_ERR PRINTK_HEADER " 24 Byte: %x MSG %x, " "%s MSGb to SYSOP\n", irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, irb->ecw[1] & 0x10 ? "" : "no"); } else { /* 32 Byte Sense Data */ sprintf(page + len, KERN_ERR PRINTK_HEADER " 32 Byte: Format: %x " "Exception class %x\n", irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); } } else { sprintf(page + len, KERN_ERR PRINTK_HEADER " SORRY - NO VALID SENSE AVAILABLE\n"); } printk("%s", page); /* dump the Channel Program (max 140 Bytes per line) */ /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ first = req->cpaddr; for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); to = min(first + 6, last); len = sprintf(page, KERN_ERR PRINTK_HEADER " Related CP in req: %p\n", req); dasd_eckd_dump_ccw_range(first, to, page + len); printk("%s", page); /* print failing CCW area (maximum 4) */ /* scsw->cda is either valid or zero */ len = 0; from = ++to; fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ if (from < fail - 2) { from = fail - 2; /* there is a gap - print header */ len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); } to = min(fail + 1, last); len += dasd_eckd_dump_ccw_range(from, to, page + len); /* print last CCWs (maximum 2) */ from = max(from, ++to); if (from < last - 1) { from = last - 1; /* there is a gap - print header */ len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); } len += dasd_eckd_dump_ccw_range(from, last, page + len); if (len > 0) printk("%s", page); free_page((unsigned long) page); } /* * max_blocks is dependent on the amount of storage that is available * in the static io buffer for each device. Currently each device has * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In * addition we have one define extent ccw + 16 bytes of data and one * locate record ccw + 16 bytes of data. That makes: * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. * We want to fit two into the available memory so that we can immediately * start the next request if one finishes off. That makes 249.5 blocks * for one request. Give a little safety and the result is 240. */ static struct dasd_discipline dasd_eckd_discipline = { .owner = THIS_MODULE, .name = "ECKD", .ebcname = "ECKD", .max_blocks = 240, .check_device = dasd_eckd_check_characteristics, .do_analysis = dasd_eckd_do_analysis, .fill_geometry = dasd_eckd_fill_geometry, .start_IO = dasd_start_IO, .term_IO = dasd_term_IO, .format_device = dasd_eckd_format_device, .examine_error = dasd_eckd_examine_error, .erp_action = dasd_eckd_erp_action, .erp_postaction = dasd_eckd_erp_postaction, .build_cp = dasd_eckd_build_cp, .free_cp = dasd_eckd_free_cp, .dump_sense = dasd_eckd_dump_sense, .fill_info = dasd_eckd_fill_info, .ioctl = dasd_eckd_ioctl, }; static int __init dasd_eckd_init(void) { ASCEBC(dasd_eckd_discipline.ebcname, 4); return ccw_driver_register(&dasd_eckd_driver); } static void __exit dasd_eckd_cleanup(void) { ccw_driver_unregister(&dasd_eckd_driver); } module_init(dasd_eckd_init); module_exit(dasd_eckd_cleanup);