/* * File...........: linux/drivers/s390/block/dasd_eckd.c * Author(s)......: Holger Smolinski Carsten Otte * Bugreports.to..: * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 * History of changes (starts July 2000) * 07/11/00 Enabled rotational position sensing * 07/14/00 Reorganized the format process for better ERP * 07/20/00 added experimental support for 2105 control unit (ESS) * 07/24/00 increased expiration time and added the missing zero * 08/07/00 added some bits to define_extent for ESS support * 09/20/00 added reserve and release ioctls * 10/04/00 changed RW-CCWS to R/W Key and Data * 10/10/00 reverted last change according to ESS exploitation * 10/10/00 now dequeuing init_cqr before freeing *ouch* * 26/10/00 fixed ITPM20144ASC (problems when accesing a device formatted by VIF) * 01/23/01 fixed kmalloc statement in dump_sense to be GFP_ATOMIC * fixed partition handling and HDIO_GETGEO */ #include #include #include #include #include /* HDIO_GETGEO */ #include #include #include #include #include #include #include #include #include "dasd_int.h" #include "dasd_eckd.h" #ifdef PRINTK_HEADER #undef PRINTK_HEADER #endif /* PRINTK_HEADER */ #define PRINTK_HEADER DASD_NAME"(eckd):" #undef CDL_PRINTK #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) dasd_discipline_t dasd_eckd_discipline; typedef struct dasd_eckd_private_t { dasd_eckd_characteristics_t rdc_data; dasd_eckd_confdata_t conf_data; eckd_count_t count_area[5]; int uses_cdl; } dasd_eckd_private_t; #ifdef CONFIG_DASD_DYNAMIC static devreg_t dasd_eckd_known_devices[] = { { ci: { hc: {ctype:0x3880, dtype: 3390}}, flag:(DEVREG_MATCH_CU_TYPE | DEVREG_MATCH_DEV_TYPE | DEVREG_TYPE_DEVCHARS), oper_func:dasd_oper_handler }, { ci: { hc: {ctype:0x3990}}, flag:(DEVREG_MATCH_CU_TYPE | DEVREG_TYPE_DEVCHARS), oper_func:dasd_oper_handler }, { ci: { hc: {ctype:0x2105}}, flag:(DEVREG_MATCH_CU_TYPE | DEVREG_TYPE_DEVCHARS), oper_func:dasd_oper_handler }, { ci: { hc: {ctype:0x9343}}, flag:(DEVREG_MATCH_CU_TYPE | DEVREG_TYPE_DEVCHARS), oper_func:dasd_oper_handler } }; #endif 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 (dasd_eckd_characteristics_t * rdc, int kl, /* key length */ int dl /* data length */ ) { int bpr = 0; switch (rdc->formula) { case 0x01:{ unsigned int fl1, fl2; 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:{ unsigned int fl1, fl2, int1, int2; 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: INTERNAL_ERROR ("unknown formula%d\n", rdc->formula); } return bpr; } static inline unsigned int bytes_per_track (dasd_eckd_characteristics_t * rdc) { return *(unsigned int *) (rdc->byte_per_track) >> 8; } static inline unsigned int recs_per_track (dasd_eckd_characteristics_t * rdc, unsigned int kl, unsigned int dl) { int rpt = 0; int dn; 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) { int 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) { int 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 rpt; } static inline int define_extent (ccw1_t * de_ccw, DE_eckd_data_t * data, int trk, int totrk, int cmd, dasd_device_t * device, ccw_req_t* cqr) { int rc=0; ch_t geo, beg, end; dasd_eckd_private_t *private = (dasd_eckd_private_t *) device->private; 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; memset (de_ccw, 0, sizeof (ccw1_t)); de_ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; de_ccw->count = 16; if ((rc=dasd_set_normalized_cda (de_ccw, __pa (data), cqr, device))) return rc; memset (data, 0, sizeof (DE_eckd_data_t)); 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: /* Fallthrough */ 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 = 0x3; /* enable seq. caching */ 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 = 0x3; /* enable seq. caching */ break; case DASD_ECKD_CCW_WRITE_CKD: case DASD_ECKD_CCW_WRITE_CKD_MT: data->attributes.operation = 0x1; /* format through cache */ 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 = 0x1; /* format through cache */ break; default: INTERNAL_ERROR ("unknown opcode 0x%x\n", cmd); break; } data->attributes.mode = 0x3; if (private->rdc_data.cu_type == 0x2105 && !(private->uses_cdl && trk < 2) ) { data->reserved |= 0x40; } data->beg_ext.cyl = beg.cyl; data->beg_ext.head = beg.head; data->end_ext.cyl = end.cyl; data->end_ext.head = end.head; return rc; } static inline int locate_record (ccw1_t * lo_ccw, LO_eckd_data_t * data, int trk, int rec_on_trk, int no_rec, int cmd, dasd_device_t * device, int reclen, ccw_req_t* cqr) { int rc=0; dasd_eckd_private_t *private = (dasd_eckd_private_t *) device->private; ch_t geo = { private->rdc_data.no_cyl, private->rdc_data.trk_per_cyl }; ch_t seek = { trk / (geo.head), trk % (geo.head) }; int sector = 0; #ifdef CDL_PRINTK printk ("Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d\n", trk, rec_on_trk, no_rec, cmd, reclen); #endif memset (lo_ccw, 0, sizeof (ccw1_t)); lo_ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; lo_ccw->count = 16; if ((rc=dasd_set_normalized_cda (lo_ccw, __pa (data), cqr, device))) return rc; memset (data, 0, sizeof (LO_eckd_data_t)); if (rec_on_trk) { switch (private->rdc_data.dev_type) { case 0x3390:{ int dn, d; 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:{ int d; d = 7 + ceil_quot (reclen + 12, 32); sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; break; } case 0x9345: default: sector = 0; } } 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: INTERNAL_ERROR ("unknown opcode 0x%x\n", cmd); } memcpy (&(data->seek_addr), &seek, sizeof (ch_t)); memcpy (&(data->search_arg), &seek, sizeof (ch_t)); data->search_arg.record = rec_on_trk; return rc; } static int dasd_eckd_id_check (s390_dev_info_t * info) { if (info->sid_data.cu_type == 0x3990 || info->sid_data.cu_type == 0x2105) if (info->sid_data.dev_type == 0x3390) return 0; if (info->sid_data.cu_type == 0x3990 || info->sid_data.cu_type == 0x2105) if (info->sid_data.dev_type == 0x3380) return 0; if (info->sid_data.cu_type == 0x9343) if (info->sid_data.dev_type == 0x9345) return 0; return -ENODEV; } static int dasd_eckd_check_characteristics (struct dasd_device_t *device) { int rc = 0; void *conf_data; void *rdc_data; int conf_len; dasd_eckd_private_t *private; if (device == NULL) { printk (KERN_WARNING PRINTK_HEADER "Null device pointer passed to characteristics checker\n"); return -ENODEV; } device->private = kmalloc (sizeof (dasd_eckd_private_t), GFP_KERNEL); if (device->private == NULL) { printk (KERN_WARNING PRINTK_HEADER "memory allocation failed for private data\n"); rc = -ENOMEM; goto fail; } private = (dasd_eckd_private_t *) device->private; rdc_data = (void *) &(private->rdc_data); rc = read_dev_chars (device->devinfo.irq, &rdc_data, 64); if (rc) { printk (KERN_WARNING PRINTK_HEADER "Read device characteristics returned error %d\n", rc); goto fail; } printk (KERN_INFO PRINTK_HEADER "%04X on sch %d: %04X/%02X(CU:%04X/%02X) " "Cyl:%d Head:%d Sec:%d\n", device->devinfo.devno, device->devinfo.irq, 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); rc = read_conf_data (device->devinfo.irq, &conf_data, &conf_len, LPM_ANYPATH); if (rc == -EOPNOTSUPP) { rc = 0; /* this one is ok */ } if (rc) { printk (KERN_WARNING PRINTK_HEADER "Read configuration data returned error %d\n", rc); goto fail; } if (conf_data == NULL) { printk (KERN_WARNING PRINTK_HEADER "No configuration data retrieved\n"); goto out; /* no errror */ } if (conf_len != sizeof (dasd_eckd_confdata_t)) { printk (KERN_WARNING PRINTK_HEADER "sizes of configuration data mismatch" "%d (read) vs %ld (expected)\n", conf_len, sizeof (dasd_eckd_confdata_t)); goto out; /* no errror */ } memcpy (&private->conf_data, conf_data, sizeof (dasd_eckd_confdata_t)); printk (KERN_INFO PRINTK_HEADER "%04X on sch %d: %04X/%02X(CU:%04X/%02X): " "Configuration data read\n", device->devinfo.devno, device->devinfo.irq, private->rdc_data.dev_type, private->rdc_data.dev_model, private->rdc_data.cu_type, private->rdc_data.cu_model.model); goto out; fail: if ( rc ) { kfree (device->private); device->private = NULL; } out: return rc; } static inline int dasd_eckd_cdl_reclen (dasd_device_t * device, int recid) { dasd_eckd_private_t *private = (dasd_eckd_private_t *) device->private; int byt_per_blk = device->sizes.bp_block; int blk_per_trk = recs_per_track (&(private->rdc_data), 0, byt_per_blk); if (recid < 3) return sizes_trk0[recid]; if (recid < blk_per_trk) return byt_per_blk; if (recid < 2 * blk_per_trk) return LABEL_SIZE; return byt_per_blk; } static ccw_req_t * dasd_eckd_init_analysis (struct dasd_device_t *device) { ccw_req_t *cqr = NULL; ccw1_t *ccw; DE_eckd_data_t *DE_data; LO_eckd_data_t *LO_data; dasd_eckd_private_t *private = (dasd_eckd_private_t *)device->private; eckd_count_t *count_data = private->count_area; cqr = dasd_alloc_request (dasd_eckd_discipline.name, 8 + 1, sizeof (DE_eckd_data_t) + 2 * sizeof (LO_eckd_data_t), device); if (cqr == NULL) { printk (KERN_WARNING PRINTK_HEADER "No memory to allocate initialization request\n"); goto out; } DE_data = cqr->data; LO_data = cqr->data + sizeof (DE_eckd_data_t); ccw = cqr->cpaddr; if (define_extent (ccw, DE_data, 0, 2, DASD_ECKD_CCW_READ_COUNT, device, cqr)) { goto clear_cqr; } ccw->flags |= CCW_FLAG_CC; ccw++; if (locate_record (ccw, LO_data++, 0, 0, 4, DASD_ECKD_CCW_READ_COUNT, device, 0, cqr)) { goto clear_cqr; } ccw->flags |= CCW_FLAG_CC; ccw++; ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; ccw->count = 8; if (dasd_set_normalized_cda (ccw, __pa (count_data++), cqr, device)) { goto clear_cqr; } ccw->flags |= CCW_FLAG_CC; ccw++; ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; ccw->count = 8; if (dasd_set_normalized_cda (ccw, __pa (count_data++), cqr, device)) { goto clear_cqr; } ccw->flags |= CCW_FLAG_CC; ccw++; ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; ccw->count = 8; if (dasd_set_normalized_cda (ccw, __pa (count_data++), cqr, device)) { goto clear_cqr; } ccw->flags |= CCW_FLAG_CC; ccw++; ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; ccw->count = 8; if (dasd_set_normalized_cda (ccw, __pa (count_data++), cqr, device)) { goto clear_cqr; } ccw->flags |= CCW_FLAG_CC; ccw++; if (locate_record (ccw, LO_data++, 2, 0, 1, DASD_ECKD_CCW_READ_COUNT, device, 0, cqr)) { goto clear_cqr; } ccw->flags |= CCW_FLAG_CC; ccw++; ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; ccw->count = 8; if (dasd_set_normalized_cda (ccw, __pa (count_data), cqr, device)) { goto clear_cqr; } cqr->device = device; cqr->retries = 0; cqr->status = CQR_STATUS_FILLED; dasd_chanq_enq (&device->queue, cqr); goto out; clear_cqr: dasd_free_request (cqr,device); printk (KERN_WARNING PRINTK_HEADER "No memory to allocate initialization request\n"); cqr=NULL; out: return cqr; } static int dasd_eckd_do_analysis (struct dasd_device_t *device) { int sb, rpt; dasd_eckd_private_t *private = (dasd_eckd_private_t *) device->private; eckd_count_t *count_area = NULL; char *cdl_msg; int status; int i; private->uses_cdl = 1; status = device->init_cqr->status; dasd_chanq_deq (&device->queue, device->init_cqr); dasd_free_request (device->init_cqr, device); /* Free the cqr and cleanup device->sizes */ if ( status != CQR_STATUS_DONE ) { DASD_MESSAGE (KERN_WARNING,device,"%s", "volume analysis returned fatal error"); return -EMEDIUMTYPE; } /* Check Track 0 for Compatible Disk Layout */ for (i = 0; i < 3; i++) { if ((i < 3) && ((private->count_area[i].kl != 4) || (private->count_area[i].dl != dasd_eckd_cdl_reclen (device, 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) { DASD_MESSAGE (KERN_WARNING, device, "%s", "Trk 0: no records after VTOC!"); } } if (count_area != NULL && /* we found notthing violating our disk layout */ count_area->kl == 0) { /* find out blocksize */ switch (count_area->dl) { case 512: case 1024: case 2048: case 4096: device->sizes.bp_block = count_area->dl; break; } } if (device->sizes.bp_block == 0) { DASD_MESSAGE (KERN_WARNING, device, "%s", "Volume has incompatible disk layout"); return -EMEDIUMTYPE; } device->sizes.s2b_shift = 0; /* bits to shift 512 to get a block */ device->sizes.pt_block = 2; for (sb = 512; sb < device->sizes.bp_block; sb = sb << 1) device->sizes.s2b_shift++; rpt = recs_per_track (&private->rdc_data, 0, device->sizes.bp_block); device->sizes.blocks = (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl * recs_per_track (&private->rdc_data, 0, device->sizes.bp_block)); cdl_msg = private-> uses_cdl ? "compatible disk layout" : "classic disk layout"; DASD_MESSAGE (KERN_INFO, device, "(%dkB blks): %dkB at %dkB/trk %s", (device->sizes.bp_block >> 10), (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl * recs_per_track (&private->rdc_data, 0, device->sizes.bp_block) * (device->sizes.bp_block >> 9)) >> 1, (recs_per_track (&private->rdc_data, 0, device->sizes.bp_block) * device->sizes.bp_block) >> 10, cdl_msg); return 0; } static int dasd_eckd_fill_geometry (struct dasd_device_t *device, struct hd_geometry *geo) { int rc = 0; dasd_eckd_private_t *private = (dasd_eckd_private_t *) device->private; switch (device->sizes.bp_block) { case 512: case 1024: case 2048: case 4096: geo->sectors = recs_per_track (&(private->rdc_data), 0, device->sizes.bp_block); break; default: break; } geo->cylinders = private->rdc_data.no_cyl; geo->heads = private->rdc_data.trk_per_cyl; return rc; } static ccw_req_t * dasd_eckd_format_device (dasd_device_t * device, format_data_t * fdata) { int i; ccw_req_t *fcp = NULL; DE_eckd_data_t *DE_data = NULL; LO_eckd_data_t *LO_data = NULL; eckd_count_t *ct_data = NULL; eckd_count_t *r0_data = NULL; eckd_home_t *ha_data = NULL; ccw1_t *last_ccw = NULL; void *last_data = NULL; dasd_eckd_private_t *private = (dasd_eckd_private_t *) device->private; int rpt = recs_per_track (&(private->rdc_data), 0, fdata->blksize); int cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; int head = fdata->start_unit % private->rdc_data.trk_per_cyl; int wrccws = rpt; int datasize = sizeof (DE_eckd_data_t) + sizeof (LO_eckd_data_t); if (fdata->start_unit >= (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)){ DASD_MESSAGE (KERN_INFO, device, "Track no %d too big!", fdata->start_unit); return NULL; } if ( fdata->start_unit > fdata->stop_unit) { DASD_MESSAGE (KERN_INFO, device, "Track %d reached! ending.", fdata->start_unit); return NULL; } switch (fdata->blksize) { case 512: case 1024: case 2048: case 4096: break; default: printk (KERN_WARNING PRINTK_HEADER "Invalid blocksize %d...terminating!\n", fdata->blksize); return NULL; } switch (fdata->intensity) { case 0x00: case 0x01: case 0x03: case 0x04: /* make track invalid */ case 0x08: case 0x09: case 0x0b: case 0x0c: break; default: printk (KERN_WARNING PRINTK_HEADER "Invalid flags 0x%x...terminating!\n", fdata->intensity); return NULL; } /* print status line */ if ((private->rdc_data.no_cyl < 20) ? (fdata->start_unit % private->rdc_data.no_cyl == 0) : (fdata->start_unit % private->rdc_data.no_cyl == 0 && (fdata->start_unit / private->rdc_data.no_cyl) % (private->rdc_data.no_cyl / 20))) { DASD_MESSAGE (KERN_INFO, device, "Format Cylinder: %d Flags: %d", fdata->start_unit / private->rdc_data.trk_per_cyl, fdata->intensity); } if ((fdata->intensity & ~0x8) & 0x04) { wrccws = 1; rpt = 1; } else { if (fdata->intensity & 0x1) { wrccws++; datasize += sizeof (eckd_count_t); } if (fdata->intensity & 0x2) { wrccws++; datasize += sizeof (eckd_home_t); } } fcp = dasd_alloc_request (dasd_eckd_discipline.name, wrccws + 2 + 1, datasize + rpt * sizeof (eckd_count_t), device ); if (fcp != NULL) { fcp->device = device; fcp->retries = 2; /* set retry counter to enable ERP */ last_data = fcp->data; DE_data = (DE_eckd_data_t *) last_data; last_data = (void *) (DE_data + 1); LO_data = (LO_eckd_data_t *) last_data; last_data = (void *) (LO_data + 1); if (fdata->intensity & 0x2) { ha_data = (eckd_home_t *) last_data; last_data = (void *) (ha_data + 1); } if (fdata->intensity & 0x1) { r0_data = (eckd_count_t *) last_data; last_data = (void *) (r0_data + 1); } ct_data = (eckd_count_t *) last_data; last_ccw = fcp->cpaddr; switch (fdata->intensity & ~0x08) { case 0x03: if (define_extent (last_ccw, DE_data, fdata->start_unit, fdata->start_unit, DASD_ECKD_CCW_WRITE_HOME_ADDRESS, device, fcp)) { goto clear_fcp; } last_ccw->flags |= CCW_FLAG_CC; last_ccw++; if (locate_record (last_ccw, LO_data, fdata->start_unit, 0, wrccws, DASD_ECKD_CCW_WRITE_HOME_ADDRESS, device, device->sizes.bp_block, fcp)) { goto clear_fcp; } last_ccw->flags |= CCW_FLAG_CC; last_ccw++; break; case 0x01: if (define_extent (last_ccw, DE_data, fdata->start_unit, fdata->start_unit, DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, fcp)) { goto clear_fcp; } last_ccw->flags |= CCW_FLAG_CC; last_ccw++; if (locate_record (last_ccw, LO_data, fdata->start_unit, 0, wrccws, DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, device->sizes.bp_block, fcp)) { goto clear_fcp; } last_ccw->flags |= CCW_FLAG_CC; last_ccw++; memset (r0_data, 0, sizeof (eckd_count_t)); break; case 0x04: fdata->blksize = 8; case 0x00: if (define_extent (last_ccw, DE_data, fdata->start_unit, fdata->start_unit, DASD_ECKD_CCW_WRITE_CKD, device, fcp)) { dasd_free_request (fcp, device); return NULL; } last_ccw->flags |= CCW_FLAG_CC; last_ccw++; if (locate_record (last_ccw, LO_data, fdata->start_unit, 0, wrccws, DASD_ECKD_CCW_WRITE_CKD, device, fdata->blksize, fcp)) { goto clear_fcp; } last_ccw->flags |= CCW_FLAG_CC; last_ccw++; break; default: PRINT_WARN ("Unknown format flags...%d\n", fdata->intensity); return NULL; } if (fdata->intensity & 0x02) { PRINT_WARN ("Unsupported format flag...%d\n", fdata->intensity); return NULL; } if (fdata->intensity & 0x01) { /* write record zero */ r0_data->cyl = cyl; r0_data->head = head; r0_data->record = 0; r0_data->kl = 0; r0_data->dl = 8; last_ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; last_ccw->count = 8; last_ccw->flags |= CCW_FLAG_CC | CCW_FLAG_SLI; if (dasd_set_normalized_cda (last_ccw, __pa (r0_data), fcp, device)) { goto clear_fcp; } last_ccw++; } if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ memset (ct_data, 0, sizeof (eckd_count_t)); ct_data->cyl = cyl; ct_data->head = head; ct_data->record = 1; ct_data->kl = 0; ct_data->dl = 0; last_ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; last_ccw->count = 8; last_ccw->flags |= CCW_FLAG_CC | CCW_FLAG_SLI; if (dasd_set_normalized_cda (last_ccw, __pa (ct_data), fcp, device)) { goto clear_fcp; } last_ccw++; } else { /* write remaining records */ for (i = 0; i < rpt; i++) { memset (ct_data + i, 0, sizeof (eckd_count_t)); (ct_data + i)->cyl = cyl; (ct_data + i)->head = head; (ct_data + i)->record = i + 1; (ct_data + i)->kl = 0; if (fdata->intensity & 0x08) { // special handling when formatting CDL switch (fdata->start_unit) { case 0: if (i < 3) { (ct_data + i)->kl = 4; (ct_data + i)->dl = sizes_trk0[i] - 4; } else (ct_data + i)->dl = fdata->blksize; break; case 1: (ct_data + i)->kl = 44; (ct_data + i)->dl = LABEL_SIZE - 44; break; default: (ct_data + i)->dl = fdata->blksize; break; } } else (ct_data + i)->dl = fdata->blksize; last_ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; last_ccw->flags |= CCW_FLAG_CC | CCW_FLAG_SLI; last_ccw->count = 8; if (dasd_set_normalized_cda (last_ccw, __pa (ct_data + i), fcp, device)) { goto clear_fcp; } last_ccw++; } } (last_ccw - 1)->flags &= ~(CCW_FLAG_CC | CCW_FLAG_DC); fcp->device = device; fcp->status = CQR_STATUS_FILLED; } goto out; clear_fcp: dasd_free_request (fcp, device); fcp=NULL; out: return fcp; } static dasd_era_t dasd_eckd_examine_error (ccw_req_t * cqr, devstat_t * stat) { dasd_device_t *device = (dasd_device_t *) cqr->device; if (stat->cstat == 0x00 && stat->dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) return dasd_era_none; switch (device->devinfo.sid_data.cu_type) { case 0x3990: case 0x2105: return dasd_3990_erp_examine (cqr, stat); case 0x9343: return dasd_9343_erp_examine (cqr, stat); default: printk (KERN_WARNING PRINTK_HEADER "default (unknown CU type) - RECOVERABLE return \n"); return dasd_era_recover; } } static dasd_erp_action_fn_t dasd_eckd_erp_action (ccw_req_t * cqr) { dasd_device_t *device = (dasd_device_t *) cqr->device; switch (device->devinfo.sid_data.cu_type) { case 0x3990: case 0x2105: return dasd_3990_erp_action; case 0x9343: /* Return dasd_9343_erp_action; */ default: return dasd_default_erp_action; } } static dasd_erp_postaction_fn_t dasd_eckd_erp_postaction (ccw_req_t * cqr) { return dasd_default_erp_postaction; } inline unsigned char dasd_eckd_cdl_cmd (dasd_device_t * device, int recid, int cmd) { dasd_eckd_private_t *private = (dasd_eckd_private_t *) device->private; int byt_per_blk = device->sizes.bp_block; int blk_per_trk = recs_per_track (&(private->rdc_data), 0, byt_per_blk); switch (cmd) { case READ: if (recid < 3) return DASD_ECKD_CCW_READ_KD_MT; if (recid < blk_per_trk) return DASD_ECKD_CCW_READ_MT; if (recid < 2 * blk_per_trk) return DASD_ECKD_CCW_READ_KD_MT; return DASD_ECKD_CCW_READ_MT; break; case WRITE: if (recid < 3) return DASD_ECKD_CCW_WRITE_KD_MT; if (recid < blk_per_trk) return DASD_ECKD_CCW_WRITE_MT; if (recid < 2 * blk_per_trk) return DASD_ECKD_CCW_WRITE_KD_MT; return DASD_ECKD_CCW_WRITE_MT; break; default: BUG (); } return 0; // never executed } static ccw_req_t * dasd_eckd_build_cp_from_req (dasd_device_t * device, struct request *req) { ccw_req_t *rw_cp = NULL; int rw_cmd; int bhct; long size; ccw1_t *ccw; DE_eckd_data_t *DE_data; LO_eckd_data_t *LO_data; struct buffer_head *bh; dasd_eckd_private_t *private = (dasd_eckd_private_t *) device->private; int byt_per_blk = device->sizes.bp_block; int shift = device->sizes.s2b_shift; int blk_per_trk = recs_per_track (&(private->rdc_data), 0, byt_per_blk); int btrk = (req->sector >> shift) / blk_per_trk; int etrk = ((req->sector + req->nr_sectors - 1) >> shift) / blk_per_trk; int recid = req->sector >> shift; int locate4k_set = 0; int nlocs = 0; if (req->cmd == READ) { rw_cmd = DASD_ECKD_CCW_READ_MT; } else if (req->cmd == WRITE) { rw_cmd = DASD_ECKD_CCW_WRITE_MT; } else { PRINT_ERR ("Unknown command %d\n", req->cmd); return NULL; } /* Build the request */ /* count bhs to prevent errors, when bh smaller than block */ bhct = 0; for (bh = req->bh; bh; bh = bh->b_reqnext) { if (bh->b_size < byt_per_blk) BUG(); bhct+= bh->b_size >> (device->sizes.s2b_shift+9); } if (btrk < 2 && private->uses_cdl) { if (etrk < 2) nlocs = bhct; else nlocs = 2 * blk_per_trk - recid; } rw_cp = dasd_alloc_request (dasd_eckd_discipline.name, 2 + nlocs + bhct + 1, sizeof (DE_eckd_data_t) + (1 + nlocs) * sizeof (LO_eckd_data_t), device); if (!rw_cp) { return NULL; } DE_data = rw_cp->data; LO_data = rw_cp->data + sizeof (DE_eckd_data_t); ccw = rw_cp->cpaddr; if (define_extent (ccw, DE_data, btrk, etrk, rw_cmd, device, rw_cp)) { goto clear_rw_cp; } ccw->flags |= CCW_FLAG_CC; for (bh = req->bh; bh != NULL;) { for (size = 0; size < bh->b_size; size += byt_per_blk) { if (!locate4k_set) { // we need to chain a locate record before our rw-ccw ccw++; if ((recid / blk_per_trk) < 2 && private->uses_cdl) { /* Do a locate record for our special blocks */ int cmd = dasd_eckd_cdl_cmd (device,recid, req->cmd); if (locate_record (ccw, LO_data++, recid / blk_per_trk, recid % blk_per_trk + 1, 1, cmd, device, dasd_eckd_cdl_reclen(device, recid), rw_cp)) { goto clear_rw_cp; } } else { // Do a locate record for standard blocks */ if (locate_record (ccw, LO_data++, recid /blk_per_trk, recid %blk_per_trk + 1, (((req->sector + req->nr_sectors) >> shift) - recid), rw_cmd, device, device->sizes.bp_block, rw_cp)) { goto clear_rw_cp; } locate4k_set = 1; } ccw->flags |= CCW_FLAG_CC; } ccw++; ccw->flags |= CCW_FLAG_CC; ccw->cmd_code = locate4k_set ? rw_cmd : dasd_eckd_cdl_cmd (device, recid, req->cmd); ccw->count = locate4k_set ? byt_per_blk : dasd_eckd_cdl_reclen (device, recid); if (dasd_set_normalized_cda (ccw, __pa (bh->b_data+size), rw_cp, device)) { goto clear_rw_cp; } recid++; } bh = bh->b_reqnext; } ccw->flags &= ~(CCW_FLAG_DC | CCW_FLAG_CC); rw_cp->device = device; rw_cp->expires = 5 * TOD_MIN; /* 5 minutes */ rw_cp->req = req; rw_cp->lpm = LPM_ANYPATH; rw_cp->retries = 2; asm volatile ("STCK %0":"=m" (rw_cp->buildclk)); check_then_set (&rw_cp->status, CQR_STATUS_EMPTY, CQR_STATUS_FILLED); goto out; clear_rw_cp: dasd_free_request (rw_cp, device); rw_cp=NULL; out: return rw_cp; } #if 0 int dasd_eckd_cleanup_request (ccw_req_t * cqr) { int ret = 0; struct request *req = cqr->req; dasd_device_t *device = cqr->device; int byt_per_blk = device->sizes.bp_block; for (bh = req->bh; bh != NULL;) { if (bh->b_size > byt_per_blk) { for (size = 0; size < bh->b_size; size += byt_per_blk) { ccw++; ccw->flags |= CCW_FLAG_CC; ccw->cmd_code = rw_cmd; ccw->count = byt_per_blk; set_normalized_cda (ccw, __pa (bh->b_data + size)); } bh = bh->b_reqnext; } else { /* group N bhs to fit into byt_per_blk */ for (size = 0; bh != NULL && size < byt_per_blk;) { ccw++; ccw->flags |= CCW_FLAG_DC; ccw->cmd_code = rw_cmd; ccw->count = bh->b_size; set_normalized_cda (ccw, __pa (bh->b_data)); size += bh->b_size; bh = bh->b_reqnext; } } } return ret; } #endif /* * DASD_ECKD_RESERVE * * DESCRIPTION * Buils a channel programm to reserve a device. * Options are set to 'synchronous wait for interrupt' and * 'timeout the request'. This leads to an terminate IO if * the interrupt is outstanding for a certain time. */ ccw_req_t * dasd_eckd_reserve (struct dasd_device_t * device) { ccw_req_t *cqr = dasd_alloc_request (dasd_eckd_discipline.name, 1 + 1, 0, device); if (cqr == NULL) { printk (KERN_WARNING PRINTK_HEADER "No memory to allocate initialization request\n"); return NULL; } cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; cqr->device = device; cqr->retries = 0; cqr->expires = 10 * TOD_SEC; cqr->options = (DOIO_WAIT_FOR_INTERRUPT | DOIO_TIMEOUT); /* timeout reqest */ cqr->status = CQR_STATUS_FILLED; return cqr; } /* * DASD_ECKD_RELEASE * * DESCRIPTION * Buils a channel programm to releases a prior reserved * (see dasd_eckd_reserve) device. */ ccw_req_t * dasd_eckd_release (struct dasd_device_t * device) { ccw_req_t *cqr = dasd_alloc_request (dasd_eckd_discipline.name, 1 + 1, 0, device); if (cqr == NULL) { printk (KERN_WARNING PRINTK_HEADER "No memory to allocate initialization request\n"); return NULL; } cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; cqr->device = device; cqr->retries = 0; cqr->expires = 10 * TOD_SEC; cqr->options = (DOIO_WAIT_FOR_INTERRUPT | DOIO_TIMEOUT); /* timeout reqest */ cqr->status = CQR_STATUS_FILLED; return cqr; } /* * DASD_ECKD_STEAL_LOCK * * DESCRIPTION * Buils a channel programm to break a device's reservation. * (unconditional reserve) */ ccw_req_t * dasd_eckd_steal_lock (struct dasd_device_t * device) { ccw_req_t *cqr = dasd_alloc_request (dasd_eckd_discipline.name, 1 + 1, 0, device); if (cqr == NULL) { printk (KERN_WARNING PRINTK_HEADER "No memory to allocate initialization request\n"); return NULL; } cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; cqr->device = device; cqr->retries = 0; cqr->expires = 10 * TOD_SEC; cqr->options = (DOIO_WAIT_FOR_INTERRUPT | DOIO_TIMEOUT); /* timeout reqest */ cqr->status = CQR_STATUS_FILLED; return cqr; } static inline ccw1_t * dasd_eckd_find_cmd (ccw_req_t * cqr, int cmd) { ccw1_t *cp; cp = cqr->cpaddr; do { if (cp->cmd_code == cmd) return cp; if (cp->cmd_code == CCW_CMD_TIC) { cp = (ccw1_t *) (long) cp->cda; continue; } if (cp->flags & (CCW_FLAG_DC | CCW_FLAG_CC)) { cp++; continue; } break; } while (1); return NULL; } static ccw_req_t * dasd_eckd_merge_cp (dasd_device_t * device) { return NULL; } static int dasd_eckd_fill_info (dasd_device_t * device, dasd_information_t * info) { int rc = 0; info->label_block = 2; if (((dasd_eckd_private_t *) device->private)->uses_cdl) info->FBA_layout = 0; else info->FBA_layout = 1; info->characteristics_size = sizeof (dasd_eckd_characteristics_t); memcpy (info->characteristics, &((dasd_eckd_private_t *) device->private)->rdc_data, sizeof (dasd_eckd_characteristics_t)); info->confdata_size = sizeof (dasd_eckd_confdata_t); memcpy (info->configuration_data, &((dasd_eckd_private_t *) device->private)->conf_data, sizeof (dasd_eckd_confdata_t)); return rc; } static char* dasd_eckd_dump_sense (struct dasd_device_t *device, ccw_req_t *req) { char *page = (char *) get_free_page (GFP_ATOMIC); devstat_t *stat = &device->dev_status; char *sense = stat->ii.sense.data; int len, sl, sct; if (page == NULL) { printk (KERN_ERR PRINTK_HEADER "No memory to dump sense data\n"); return NULL; } len = sprintf (page, KERN_ERR PRINTK_HEADER "device %04X on irq %d: I/O status report:\n", device->devinfo.devno, device->devinfo.irq); len += sprintf (page + len, KERN_ERR PRINTK_HEADER "in req: %p CS: 0x%02X DS: 0x%02X\n", req, stat->cstat, stat->dstat); len += sprintf (page + len, KERN_ERR PRINTK_HEADER "Failing CCW: %p\n", (void *) (long) stat->cpa); { ccw1_t *act = req->cpaddr; int i = req->cplength; do { #ifdef ERP_DEBUG printk (KERN_ERR "CCW %p: %08X %08X\n", act, ((int *) act)[0], ((int *) act)[1]); printk (KERN_ERR "DAT: %08X %08X %08X %08X\n", ((int *) act->cda)[0], ((int *) act->cda)[1], ((int *) act->cda)[2], ((int *) act->cda)[3]); #endif /* ERP_DEBUG */ act++; } while (--i); } if (stat->flag & DEVSTAT_FLAG_SENSE_AVAIL) { 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", sense[8 * sl + sct]); } len += sprintf (page + len, "\n"); } if (sense[27] & DASD_SENSE_BIT_0) { /* 24 Byte Sense Data */ len += sprintf (page + len, KERN_ERR PRINTK_HEADER "24 Byte: %x MSG %x, %s MSGb to SYSOP\n", sense[7] >> 4, sense[7] & 0x0f, sense[1] & 0x10 ? "" : "no"); } else { /* 32 Byte Sense Data */ len += sprintf (page + len, KERN_ERR PRINTK_HEADER "32 Byte: Format: %x Exception class %x\n", sense[6] & 0x0f, sense[22] >> 4); } } printk ("Sense data:\n%s", page); free_page ((unsigned long) page); return NULL; } dasd_discipline_t dasd_eckd_discipline = { owner: THIS_MODULE, name:"ECKD", ebcname:"ECKD", max_blocks:255, id_check:dasd_eckd_id_check, check_characteristics:dasd_eckd_check_characteristics, init_analysis:dasd_eckd_init_analysis, 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_from_req:dasd_eckd_build_cp_from_req, dump_sense:dasd_eckd_dump_sense, int_handler:dasd_int_handler, reserve:dasd_eckd_reserve, release:dasd_eckd_release, steal_lock:dasd_eckd_steal_lock, merge_cp:dasd_eckd_merge_cp, fill_info:dasd_eckd_fill_info, }; int dasd_eckd_init (void) { int rc = 0; printk (KERN_INFO PRINTK_HEADER "%s discipline initializing\n", dasd_eckd_discipline.name); ASCEBC (dasd_eckd_discipline.ebcname, 4); dasd_discipline_add (&dasd_eckd_discipline); #ifdef CONFIG_DASD_DYNAMIC { int i; for (i = 0; i < sizeof (dasd_eckd_known_devices) / sizeof (devreg_t); i++) { printk (KERN_INFO PRINTK_HEADER "We are interested in: CU %04X/%02x\n", dasd_eckd_known_devices[i].ci.hc.ctype, dasd_eckd_known_devices[i].ci.hc.cmode); s390_device_register (&dasd_eckd_known_devices[i]); } } #endif /* CONFIG_DASD_DYNAMIC */ return rc; } void dasd_eckd_cleanup (void) { printk (KERN_INFO PRINTK_HEADER "%s discipline cleaning up\n", dasd_eckd_discipline.name); #ifdef CONFIG_DASD_DYNAMIC { int i; for (i = 0; i < sizeof (dasd_eckd_known_devices) / sizeof (devreg_t); i++) { printk (KERN_INFO PRINTK_HEADER "We were interested in: CU %04X/%02x\n", dasd_eckd_known_devices[i].ci.hc.ctype, dasd_eckd_known_devices[i].ci.hc.cmode); s390_device_unregister (&dasd_eckd_known_devices[i]); } } #endif /* CONFIG_DASD_DYNAMIC */ dasd_discipline_del (&dasd_eckd_discipline); } #ifdef MODULE int init_module (void) { int rc = 0; rc = dasd_eckd_init (); return rc; } void cleanup_module (void) { dasd_eckd_cleanup (); return; } #endif /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically * adjust the settings for this buffer only. This must remain at the end * of the file. * --------------------------------------------------------------------------- * Local variables: * c-indent-level: 4 * c-brace-imaginary-offset: 0 * c-brace-offset: -4 * c-argdecl-indent: 4 * c-label-offset: -4 * c-continued-statement-offset: 4 * c-continued-brace-offset: 0 * indent-tabs-mode: nil * tab-width: 8 * End: */