| /* |
| * 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> |
| * Copyright IBM Corp. 1999, 2009 |
| * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 |
| * Author.........: Nigel Hislop <hislop_nigel@emc.com> |
| */ |
| |
| #define KMSG_COMPONENT "dasd-eckd" |
| |
| #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/compat.h> |
| #include <linux/init.h> |
| #include <linux/seq_file.h> |
| |
| #include <asm/css_chars.h> |
| #include <asm/debug.h> |
| #include <asm/idals.h> |
| #include <asm/ebcdic.h> |
| #include <asm/io.h> |
| #include <linux/uaccess.h> |
| #include <asm/cio.h> |
| #include <asm/ccwdev.h> |
| #include <asm/itcw.h> |
| #include <asm/schid.h> |
| #include <asm/chpid.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) |
| |
| /* |
| * raw track access always map to 64k in memory |
| * so it maps to 16 blocks of 4k per track |
| */ |
| #define DASD_RAW_BLOCK_PER_TRACK 16 |
| #define DASD_RAW_BLOCKSIZE 4096 |
| /* 64k are 128 x 512 byte sectors */ |
| #define DASD_RAW_SECTORS_PER_TRACK 128 |
| |
| MODULE_LICENSE("GPL"); |
| |
| static struct dasd_discipline dasd_eckd_discipline; |
| |
| /* 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, 0x3380, 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 */ |
| |
| static void *rawpadpage; |
| |
| #define INIT_CQR_OK 0 |
| #define INIT_CQR_UNFORMATTED 1 |
| #define INIT_CQR_ERROR 2 |
| |
| /* emergency request for reserve/release */ |
| static struct { |
| struct dasd_ccw_req cqr; |
| struct ccw1 ccw; |
| char data[32]; |
| } *dasd_reserve_req; |
| static DEFINE_MUTEX(dasd_reserve_mutex); |
| |
| /* definitions for the path verification worker */ |
| struct path_verification_work_data { |
| struct work_struct worker; |
| struct dasd_device *device; |
| struct dasd_ccw_req cqr; |
| struct ccw1 ccw; |
| __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; |
| int isglobal; |
| __u8 tbvpm; |
| }; |
| static struct path_verification_work_data *path_verification_worker; |
| static DEFINE_MUTEX(dasd_path_verification_mutex); |
| |
| struct check_attention_work_data { |
| struct work_struct worker; |
| struct dasd_device *device; |
| __u8 lpum; |
| }; |
| |
| static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, |
| struct dasd_device *, struct dasd_device *, |
| unsigned int, int, unsigned int, unsigned int, |
| unsigned int, unsigned int); |
| |
| /* 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 | |
| CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); |
| if (ret) { |
| DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", |
| "dasd_eckd_probe: could not set " |
| "ccw-device options"); |
| 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 const int sizes_trk0[] = { 28, 148, 84 }; |
| #define LABEL_SIZE 140 |
| |
| /* head and record addresses of count_area read in analysis ccw */ |
| static const int count_area_head[] = { 0, 0, 0, 0, 2 }; |
| static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; |
| |
| 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 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 void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) |
| { |
| geo->cyl = (__u16) cyl; |
| geo->head = cyl >> 16; |
| geo->head <<= 4; |
| geo->head |= head; |
| } |
| |
| static int |
| check_XRC (struct ccw1 *de_ccw, |
| struct DE_eckd_data *data, |
| struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int rc; |
| |
| if (!private->rdc_data.facilities.XRC_supported) |
| return 0; |
| |
| /* switch on System Time Stamp - needed for XRC Support */ |
| data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ |
| data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ |
| |
| rc = get_phys_clock(&data->ep_sys_time); |
| /* Ignore return code if sync clock is switched off. */ |
| if (rc == -EOPNOTSUPP || rc == -EACCES) |
| rc = 0; |
| |
| de_ccw->count = sizeof(struct DE_eckd_data); |
| de_ccw->flags |= CCW_FLAG_SLI; |
| return rc; |
| } |
| |
| static int |
| define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, |
| unsigned int totrk, int cmd, struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| u32 begcyl, endcyl; |
| u16 heads, beghead, endhead; |
| int rc = 0; |
| |
| 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: |
| data->mask.perm = 0x1; |
| data->attributes.operation = private->attrib.operation; |
| break; |
| case DASD_ECKD_CCW_READ_COUNT: |
| data->mask.perm = 0x1; |
| data->attributes.operation = DASD_BYPASS_CACHE; |
| 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; |
| rc = 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; |
| rc = 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; |
| rc = check_XRC (ccw, data, device); |
| break; |
| default: |
| dev_err(&device->cdev->dev, |
| "0x%x is not a known command\n", 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 */ |
| |
| heads = private->rdc_data.trk_per_cyl; |
| begcyl = trk / heads; |
| beghead = trk % heads; |
| endcyl = totrk / heads; |
| endhead = totrk % heads; |
| |
| /* check for sequential prestage - enhance cylinder range */ |
| if (data->attributes.operation == DASD_SEQ_PRESTAGE || |
| data->attributes.operation == DASD_SEQ_ACCESS) { |
| |
| if (endcyl + private->attrib.nr_cyl < private->real_cyl) |
| endcyl += private->attrib.nr_cyl; |
| else |
| endcyl = (private->real_cyl - 1); |
| } |
| |
| set_ch_t(&data->beg_ext, begcyl, beghead); |
| set_ch_t(&data->end_ext, endcyl, endhead); |
| return rc; |
| } |
| |
| static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, |
| struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int rc; |
| |
| if (!private->rdc_data.facilities.XRC_supported) |
| return 0; |
| |
| /* switch on System Time Stamp - needed for XRC Support */ |
| pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ |
| pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ |
| pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ |
| |
| rc = get_phys_clock(&pfxdata->define_extent.ep_sys_time); |
| /* Ignore return code if sync clock is switched off. */ |
| if (rc == -EOPNOTSUPP || rc == -EACCES) |
| rc = 0; |
| return rc; |
| } |
| |
| static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, |
| unsigned int rec_on_trk, int count, int cmd, |
| struct dasd_device *device, unsigned int reclen, |
| unsigned int tlf) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int sector; |
| int dn, d; |
| |
| memset(data, 0, sizeof(*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; |
| /* note: meaning of count depends on the operation |
| * for record based I/O it's the number of records, but for |
| * track based I/O it's the number of tracks |
| */ |
| data->count = count; |
| 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.length_valid = 0x1; |
| data->length = reclen; |
| data->operation.operation = 0x01; |
| break; |
| case DASD_ECKD_CCW_WRITE_CKD: |
| case DASD_ECKD_CCW_WRITE_CKD_MT: |
| data->auxiliary.length_valid = 0x1; |
| data->length = reclen; |
| data->operation.operation = 0x03; |
| break; |
| case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
| data->operation.orientation = 0x0; |
| data->operation.operation = 0x3F; |
| data->extended_operation = 0x11; |
| data->length = 0; |
| data->extended_parameter_length = 0x02; |
| if (data->count > 8) { |
| data->extended_parameter[0] = 0xFF; |
| data->extended_parameter[1] = 0xFF; |
| data->extended_parameter[1] <<= (16 - count); |
| } else { |
| data->extended_parameter[0] = 0xFF; |
| data->extended_parameter[0] <<= (8 - count); |
| data->extended_parameter[1] = 0x00; |
| } |
| data->sector = 0xFF; |
| break; |
| case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
| data->auxiliary.length_valid = 0x1; |
| data->length = reclen; /* not tlf, as one might think */ |
| data->operation.operation = 0x3F; |
| data->extended_operation = 0x23; |
| 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.length_valid = 0x1; |
| data->length = reclen; |
| data->operation.operation = 0x06; |
| break; |
| case DASD_ECKD_CCW_READ_CKD: |
| case DASD_ECKD_CCW_READ_CKD_MT: |
| data->auxiliary.length_valid = 0x1; |
| data->length = reclen; |
| data->operation.operation = 0x16; |
| break; |
| case DASD_ECKD_CCW_READ_COUNT: |
| data->operation.operation = 0x06; |
| break; |
| case DASD_ECKD_CCW_READ_TRACK: |
| data->operation.orientation = 0x1; |
| data->operation.operation = 0x0C; |
| data->extended_parameter_length = 0; |
| data->sector = 0xFF; |
| break; |
| case DASD_ECKD_CCW_READ_TRACK_DATA: |
| data->auxiliary.length_valid = 0x1; |
| data->length = tlf; |
| data->operation.operation = 0x0C; |
| break; |
| case DASD_ECKD_CCW_ERASE: |
| data->length = reclen; |
| data->auxiliary.length_valid = 0x1; |
| data->operation.operation = 0x0b; |
| break; |
| default: |
| DBF_DEV_EVENT(DBF_ERR, device, |
| "fill LRE unknown opcode 0x%x", cmd); |
| BUG(); |
| } |
| set_ch_t(&data->seek_addr, |
| trk / private->rdc_data.trk_per_cyl, |
| trk % private->rdc_data.trk_per_cyl); |
| data->search_arg.cyl = data->seek_addr.cyl; |
| data->search_arg.head = data->seek_addr.head; |
| data->search_arg.record = rec_on_trk; |
| } |
| |
| static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
| unsigned int trk, unsigned int totrk, int cmd, |
| struct dasd_device *basedev, struct dasd_device *startdev, |
| unsigned char format, unsigned int rec_on_trk, int count, |
| unsigned int blksize, unsigned int tlf) |
| { |
| struct dasd_eckd_private *basepriv, *startpriv; |
| struct DE_eckd_data *dedata; |
| struct LRE_eckd_data *lredata; |
| u32 begcyl, endcyl; |
| u16 heads, beghead, endhead; |
| int rc = 0; |
| |
| basepriv = basedev->private; |
| startpriv = startdev->private; |
| dedata = &pfxdata->define_extent; |
| lredata = &pfxdata->locate_record; |
| |
| ccw->cmd_code = DASD_ECKD_CCW_PFX; |
| ccw->flags = 0; |
| if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { |
| ccw->count = sizeof(*pfxdata) + 2; |
| ccw->cda = (__u32) __pa(pfxdata); |
| memset(pfxdata, 0, sizeof(*pfxdata) + 2); |
| } else { |
| ccw->count = sizeof(*pfxdata); |
| ccw->cda = (__u32) __pa(pfxdata); |
| memset(pfxdata, 0, sizeof(*pfxdata)); |
| } |
| |
| /* prefix data */ |
| if (format > 1) { |
| DBF_DEV_EVENT(DBF_ERR, basedev, |
| "PFX LRE unknown format 0x%x", format); |
| BUG(); |
| return -EINVAL; |
| } |
| pfxdata->format = format; |
| pfxdata->base_address = basepriv->ned->unit_addr; |
| pfxdata->base_lss = basepriv->ned->ID; |
| pfxdata->validity.define_extent = 1; |
| |
| /* private uid is kept up to date, conf_data may be outdated */ |
| if (startpriv->uid.type != UA_BASE_DEVICE) { |
| pfxdata->validity.verify_base = 1; |
| if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) |
| pfxdata->validity.hyper_pav = 1; |
| } |
| |
| /* define extend data (mostly)*/ |
| 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: |
| dedata->mask.perm = 0x1; |
| dedata->attributes.operation = basepriv->attrib.operation; |
| break; |
| case DASD_ECKD_CCW_READ_COUNT: |
| dedata->mask.perm = 0x1; |
| dedata->attributes.operation = DASD_BYPASS_CACHE; |
| break; |
| case DASD_ECKD_CCW_READ_TRACK: |
| case DASD_ECKD_CCW_READ_TRACK_DATA: |
| dedata->mask.perm = 0x1; |
| dedata->attributes.operation = basepriv->attrib.operation; |
| dedata->blk_size = 0; |
| 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: |
| dedata->mask.perm = 0x02; |
| dedata->attributes.operation = basepriv->attrib.operation; |
| rc = check_XRC_on_prefix(pfxdata, basedev); |
| break; |
| case DASD_ECKD_CCW_WRITE_CKD: |
| case DASD_ECKD_CCW_WRITE_CKD_MT: |
| dedata->attributes.operation = DASD_BYPASS_CACHE; |
| rc = check_XRC_on_prefix(pfxdata, basedev); |
| break; |
| case DASD_ECKD_CCW_ERASE: |
| case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: |
| case DASD_ECKD_CCW_WRITE_RECORD_ZERO: |
| dedata->mask.perm = 0x3; |
| dedata->mask.auth = 0x1; |
| dedata->attributes.operation = DASD_BYPASS_CACHE; |
| rc = check_XRC_on_prefix(pfxdata, basedev); |
| break; |
| case DASD_ECKD_CCW_WRITE_FULL_TRACK: |
| dedata->mask.perm = 0x03; |
| dedata->attributes.operation = basepriv->attrib.operation; |
| dedata->blk_size = 0; |
| break; |
| case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
| dedata->mask.perm = 0x02; |
| dedata->attributes.operation = basepriv->attrib.operation; |
| dedata->blk_size = blksize; |
| rc = check_XRC_on_prefix(pfxdata, basedev); |
| break; |
| default: |
| DBF_DEV_EVENT(DBF_ERR, basedev, |
| "PFX LRE unknown opcode 0x%x", cmd); |
| BUG(); |
| return -EINVAL; |
| } |
| |
| dedata->attributes.mode = 0x3; /* ECKD */ |
| |
| if ((basepriv->rdc_data.cu_type == 0x2105 || |
| basepriv->rdc_data.cu_type == 0x2107 || |
| basepriv->rdc_data.cu_type == 0x1750) |
| && !(basepriv->uses_cdl && trk < 2)) |
| dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ |
| |
| heads = basepriv->rdc_data.trk_per_cyl; |
| begcyl = trk / heads; |
| beghead = trk % heads; |
| endcyl = totrk / heads; |
| endhead = totrk % heads; |
| |
| /* check for sequential prestage - enhance cylinder range */ |
| if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || |
| dedata->attributes.operation == DASD_SEQ_ACCESS) { |
| |
| if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) |
| endcyl += basepriv->attrib.nr_cyl; |
| else |
| endcyl = (basepriv->real_cyl - 1); |
| } |
| |
| set_ch_t(&dedata->beg_ext, begcyl, beghead); |
| set_ch_t(&dedata->end_ext, endcyl, endhead); |
| |
| if (format == 1) { |
| fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, |
| basedev, blksize, tlf); |
| } |
| |
| return rc; |
| } |
| |
| static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, |
| unsigned int trk, unsigned int totrk, int cmd, |
| struct dasd_device *basedev, struct dasd_device *startdev) |
| { |
| return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, |
| 0, 0, 0, 0, 0); |
| } |
| |
| static void |
| locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, |
| unsigned int rec_on_trk, int no_rec, int cmd, |
| struct dasd_device * device, int reclen) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int sector; |
| int dn, d; |
| |
| 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: |
| DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " |
| "opcode 0x%x", cmd); |
| } |
| set_ch_t(&data->seek_addr, |
| trk / private->rdc_data.trk_per_cyl, |
| trk % private->rdc_data.trk_per_cyl); |
| data->search_arg.cyl = data->seek_addr.cyl; |
| data->search_arg.head = data->seek_addr.head; |
| 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; |
| } |
| /* create unique id from private structure. */ |
| static void create_uid(struct dasd_eckd_private *private) |
| { |
| int count; |
| struct dasd_uid *uid; |
| |
| uid = &private->uid; |
| memset(uid, 0, sizeof(struct dasd_uid)); |
| memcpy(uid->vendor, private->ned->HDA_manufacturer, |
| sizeof(uid->vendor) - 1); |
| EBCASC(uid->vendor, sizeof(uid->vendor) - 1); |
| memcpy(uid->serial, private->ned->HDA_location, |
| sizeof(uid->serial) - 1); |
| EBCASC(uid->serial, sizeof(uid->serial) - 1); |
| uid->ssid = private->gneq->subsystemID; |
| uid->real_unit_addr = private->ned->unit_addr; |
| if (private->sneq) { |
| uid->type = private->sneq->sua_flags; |
| if (uid->type == UA_BASE_PAV_ALIAS) |
| uid->base_unit_addr = private->sneq->base_unit_addr; |
| } else { |
| uid->type = UA_BASE_DEVICE; |
| } |
| if (private->vdsneq) { |
| for (count = 0; count < 16; count++) { |
| sprintf(uid->vduit+2*count, "%02x", |
| private->vdsneq->uit[count]); |
| } |
| } |
| } |
| |
| /* |
| * Generate device unique id that specifies the physical device. |
| */ |
| static int dasd_eckd_generate_uid(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| unsigned long flags; |
| |
| if (!private) |
| return -ENODEV; |
| if (!private->ned || !private->gneq) |
| return -ENODEV; |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| create_uid(private); |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| return 0; |
| } |
| |
| static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) |
| { |
| struct dasd_eckd_private *private = device->private; |
| unsigned long flags; |
| |
| if (private) { |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| *uid = private->uid; |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| return 0; |
| } |
| return -EINVAL; |
| } |
| |
| /* |
| * compare device UID with data of a given dasd_eckd_private structure |
| * return 0 for match |
| */ |
| static int dasd_eckd_compare_path_uid(struct dasd_device *device, |
| struct dasd_eckd_private *private) |
| { |
| struct dasd_uid device_uid; |
| |
| create_uid(private); |
| dasd_eckd_get_uid(device, &device_uid); |
| |
| return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); |
| } |
| |
| static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, |
| struct dasd_ccw_req *cqr, |
| __u8 *rcd_buffer, |
| __u8 lpm) |
| { |
| struct ccw1 *ccw; |
| /* |
| * buffer has to start with EBCDIC "V1.0" to show |
| * support for virtual device SNEQ |
| */ |
| rcd_buffer[0] = 0xE5; |
| rcd_buffer[1] = 0xF1; |
| rcd_buffer[2] = 0x4B; |
| rcd_buffer[3] = 0xF0; |
| |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_RCD; |
| ccw->flags = 0; |
| ccw->cda = (__u32)(addr_t)rcd_buffer; |
| ccw->count = DASD_ECKD_RCD_DATA_SIZE; |
| cqr->magic = DASD_ECKD_MAGIC; |
| |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->block = NULL; |
| cqr->expires = 10*HZ; |
| cqr->lpm = lpm; |
| cqr->retries = 256; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
| } |
| |
| /* |
| * Wakeup helper for read_conf |
| * if the cqr is not done and needs some error recovery |
| * the buffer has to be re-initialized with the EBCDIC "V1.0" |
| * to show support for virtual device SNEQ |
| */ |
| static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) |
| { |
| struct ccw1 *ccw; |
| __u8 *rcd_buffer; |
| |
| if (cqr->status != DASD_CQR_DONE) { |
| ccw = cqr->cpaddr; |
| rcd_buffer = (__u8 *)((addr_t) ccw->cda); |
| memset(rcd_buffer, 0, sizeof(*rcd_buffer)); |
| |
| rcd_buffer[0] = 0xE5; |
| rcd_buffer[1] = 0xF1; |
| rcd_buffer[2] = 0x4B; |
| rcd_buffer[3] = 0xF0; |
| } |
| dasd_wakeup_cb(cqr, data); |
| } |
| |
| static int dasd_eckd_read_conf_immediately(struct dasd_device *device, |
| struct dasd_ccw_req *cqr, |
| __u8 *rcd_buffer, |
| __u8 lpm) |
| { |
| struct ciw *ciw; |
| int rc; |
| /* |
| * sanity check: scan for RCD command in extended SenseID data |
| * some devices do not support RCD |
| */ |
| ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); |
| if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) |
| return -EOPNOTSUPP; |
| |
| dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); |
| clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
| set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
| cqr->retries = 5; |
| cqr->callback = read_conf_cb; |
| rc = dasd_sleep_on_immediatly(cqr); |
| return rc; |
| } |
| |
| static int dasd_eckd_read_conf_lpm(struct dasd_device *device, |
| void **rcd_buffer, |
| int *rcd_buffer_size, __u8 lpm) |
| { |
| struct ciw *ciw; |
| char *rcd_buf = NULL; |
| int ret; |
| struct dasd_ccw_req *cqr; |
| |
| /* |
| * sanity check: scan for RCD command in extended SenseID data |
| * some devices do not support RCD |
| */ |
| ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); |
| if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { |
| ret = -EOPNOTSUPP; |
| goto out_error; |
| } |
| rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); |
| if (!rcd_buf) { |
| ret = -ENOMEM; |
| goto out_error; |
| } |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, |
| 0, /* use rcd_buf as data ara */ |
| device); |
| if (IS_ERR(cqr)) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Could not allocate RCD request"); |
| ret = -ENOMEM; |
| goto out_error; |
| } |
| dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); |
| cqr->callback = read_conf_cb; |
| ret = dasd_sleep_on(cqr); |
| /* |
| * on success we update the user input parms |
| */ |
| dasd_sfree_request(cqr, cqr->memdev); |
| if (ret) |
| goto out_error; |
| |
| *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; |
| *rcd_buffer = rcd_buf; |
| return 0; |
| out_error: |
| kfree(rcd_buf); |
| *rcd_buffer = NULL; |
| *rcd_buffer_size = 0; |
| return ret; |
| } |
| |
| static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) |
| { |
| |
| struct dasd_sneq *sneq; |
| int i, count; |
| |
| private->ned = NULL; |
| private->sneq = NULL; |
| private->vdsneq = NULL; |
| private->gneq = NULL; |
| count = private->conf_len / sizeof(struct dasd_sneq); |
| sneq = (struct dasd_sneq *)private->conf_data; |
| for (i = 0; i < count; ++i) { |
| if (sneq->flags.identifier == 1 && sneq->format == 1) |
| private->sneq = sneq; |
| else if (sneq->flags.identifier == 1 && sneq->format == 4) |
| private->vdsneq = (struct vd_sneq *)sneq; |
| else if (sneq->flags.identifier == 2) |
| private->gneq = (struct dasd_gneq *)sneq; |
| else if (sneq->flags.identifier == 3 && sneq->res1 == 1) |
| private->ned = (struct dasd_ned *)sneq; |
| sneq++; |
| } |
| if (!private->ned || !private->gneq) { |
| private->ned = NULL; |
| private->sneq = NULL; |
| private->vdsneq = NULL; |
| private->gneq = NULL; |
| return -EINVAL; |
| } |
| return 0; |
| |
| }; |
| |
| static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) |
| { |
| struct dasd_gneq *gneq; |
| int i, count, found; |
| |
| count = conf_len / sizeof(*gneq); |
| gneq = (struct dasd_gneq *)conf_data; |
| found = 0; |
| for (i = 0; i < count; ++i) { |
| if (gneq->flags.identifier == 2) { |
| found = 1; |
| break; |
| } |
| gneq++; |
| } |
| if (found) |
| return ((char *)gneq)[18] & 0x07; |
| else |
| return 0; |
| } |
| |
| static void dasd_eckd_clear_conf_data(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int i; |
| |
| private->conf_data = NULL; |
| private->conf_len = 0; |
| for (i = 0; i < 8; i++) { |
| kfree(device->path[i].conf_data); |
| device->path[i].conf_data = NULL; |
| device->path[i].cssid = 0; |
| device->path[i].ssid = 0; |
| device->path[i].chpid = 0; |
| } |
| } |
| |
| |
| static int dasd_eckd_read_conf(struct dasd_device *device) |
| { |
| void *conf_data; |
| int conf_len, conf_data_saved; |
| int rc, path_err, pos; |
| __u8 lpm, opm; |
| struct dasd_eckd_private *private, path_private; |
| struct dasd_uid *uid; |
| char print_path_uid[60], print_device_uid[60]; |
| struct channel_path_desc *chp_desc; |
| struct subchannel_id sch_id; |
| |
| private = device->private; |
| opm = ccw_device_get_path_mask(device->cdev); |
| ccw_device_get_schid(device->cdev, &sch_id); |
| conf_data_saved = 0; |
| path_err = 0; |
| /* get configuration data per operational path */ |
| for (lpm = 0x80; lpm; lpm>>= 1) { |
| if (!(lpm & opm)) |
| continue; |
| rc = dasd_eckd_read_conf_lpm(device, &conf_data, |
| &conf_len, lpm); |
| if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
| "Read configuration data returned " |
| "error %d", rc); |
| return rc; |
| } |
| if (conf_data == NULL) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "No configuration data " |
| "retrieved"); |
| /* no further analysis possible */ |
| dasd_path_add_opm(device, opm); |
| continue; /* no error */ |
| } |
| /* save first valid configuration data */ |
| if (!conf_data_saved) { |
| /* initially clear previously stored conf_data */ |
| dasd_eckd_clear_conf_data(device); |
| private->conf_data = conf_data; |
| private->conf_len = conf_len; |
| if (dasd_eckd_identify_conf_parts(private)) { |
| private->conf_data = NULL; |
| private->conf_len = 0; |
| kfree(conf_data); |
| continue; |
| } |
| pos = pathmask_to_pos(lpm); |
| /* store per path conf_data */ |
| device->path[pos].conf_data = conf_data; |
| device->path[pos].cssid = sch_id.cssid; |
| device->path[pos].ssid = sch_id.ssid; |
| chp_desc = ccw_device_get_chp_desc(device->cdev, pos); |
| if (chp_desc) |
| device->path[pos].chpid = chp_desc->chpid; |
| kfree(chp_desc); |
| /* |
| * build device UID that other path data |
| * can be compared to it |
| */ |
| dasd_eckd_generate_uid(device); |
| conf_data_saved++; |
| } else { |
| path_private.conf_data = conf_data; |
| path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; |
| if (dasd_eckd_identify_conf_parts( |
| &path_private)) { |
| path_private.conf_data = NULL; |
| path_private.conf_len = 0; |
| kfree(conf_data); |
| continue; |
| } |
| if (dasd_eckd_compare_path_uid( |
| device, &path_private)) { |
| uid = &path_private.uid; |
| if (strlen(uid->vduit) > 0) |
| snprintf(print_path_uid, |
| sizeof(print_path_uid), |
| "%s.%s.%04x.%02x.%s", |
| uid->vendor, uid->serial, |
| uid->ssid, uid->real_unit_addr, |
| uid->vduit); |
| else |
| snprintf(print_path_uid, |
| sizeof(print_path_uid), |
| "%s.%s.%04x.%02x", |
| uid->vendor, uid->serial, |
| uid->ssid, |
| uid->real_unit_addr); |
| uid = &private->uid; |
| if (strlen(uid->vduit) > 0) |
| snprintf(print_device_uid, |
| sizeof(print_device_uid), |
| "%s.%s.%04x.%02x.%s", |
| uid->vendor, uid->serial, |
| uid->ssid, uid->real_unit_addr, |
| uid->vduit); |
| else |
| snprintf(print_device_uid, |
| sizeof(print_device_uid), |
| "%s.%s.%04x.%02x", |
| uid->vendor, uid->serial, |
| uid->ssid, |
| uid->real_unit_addr); |
| dev_err(&device->cdev->dev, |
| "Not all channel paths lead to " |
| "the same device, path %02X leads to " |
| "device %s instead of %s\n", lpm, |
| print_path_uid, print_device_uid); |
| path_err = -EINVAL; |
| dasd_path_add_cablepm(device, lpm); |
| continue; |
| } |
| pos = pathmask_to_pos(lpm); |
| /* store per path conf_data */ |
| device->path[pos].conf_data = conf_data; |
| device->path[pos].cssid = sch_id.cssid; |
| device->path[pos].ssid = sch_id.ssid; |
| chp_desc = ccw_device_get_chp_desc(device->cdev, pos); |
| if (chp_desc) |
| device->path[pos].chpid = chp_desc->chpid; |
| kfree(chp_desc); |
| path_private.conf_data = NULL; |
| path_private.conf_len = 0; |
| } |
| switch (dasd_eckd_path_access(conf_data, conf_len)) { |
| case 0x02: |
| dasd_path_add_nppm(device, lpm); |
| break; |
| case 0x03: |
| dasd_path_add_ppm(device, lpm); |
| break; |
| } |
| if (!dasd_path_get_opm(device)) { |
| dasd_path_set_opm(device, lpm); |
| dasd_generic_path_operational(device); |
| } else { |
| dasd_path_add_opm(device, lpm); |
| } |
| } |
| |
| return path_err; |
| } |
| |
| static u32 get_fcx_max_data(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int fcx_in_css, fcx_in_gneq, fcx_in_features; |
| int tpm, mdc; |
| |
| if (dasd_nofcx) |
| return 0; |
| /* is transport mode supported? */ |
| fcx_in_css = css_general_characteristics.fcx; |
| fcx_in_gneq = private->gneq->reserved2[7] & 0x04; |
| fcx_in_features = private->features.feature[40] & 0x80; |
| tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; |
| |
| if (!tpm) |
| return 0; |
| |
| mdc = ccw_device_get_mdc(device->cdev, 0); |
| if (mdc < 0) { |
| dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); |
| return 0; |
| } else { |
| return (u32)mdc * FCX_MAX_DATA_FACTOR; |
| } |
| } |
| |
| static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int mdc; |
| u32 fcx_max_data; |
| |
| if (private->fcx_max_data) { |
| mdc = ccw_device_get_mdc(device->cdev, lpm); |
| if ((mdc < 0)) { |
| dev_warn(&device->cdev->dev, |
| "Detecting the maximum data size for zHPF " |
| "requests failed (rc=%d) for a new path %x\n", |
| mdc, lpm); |
| return mdc; |
| } |
| fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; |
| if (fcx_max_data < private->fcx_max_data) { |
| dev_warn(&device->cdev->dev, |
| "The maximum data size for zHPF requests %u " |
| "on a new path %x is below the active maximum " |
| "%u\n", fcx_max_data, lpm, |
| private->fcx_max_data); |
| return -EACCES; |
| } |
| } |
| return 0; |
| } |
| |
| static int rebuild_device_uid(struct dasd_device *device, |
| struct path_verification_work_data *data) |
| { |
| struct dasd_eckd_private *private = device->private; |
| __u8 lpm, opm = dasd_path_get_opm(device); |
| int rc = -ENODEV; |
| |
| for (lpm = 0x80; lpm; lpm >>= 1) { |
| if (!(lpm & opm)) |
| continue; |
| memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); |
| memset(&data->cqr, 0, sizeof(data->cqr)); |
| data->cqr.cpaddr = &data->ccw; |
| rc = dasd_eckd_read_conf_immediately(device, &data->cqr, |
| data->rcd_buffer, |
| lpm); |
| |
| if (rc) { |
| if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ |
| continue; |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
| "Read configuration data " |
| "returned error %d", rc); |
| break; |
| } |
| memcpy(private->conf_data, data->rcd_buffer, |
| DASD_ECKD_RCD_DATA_SIZE); |
| if (dasd_eckd_identify_conf_parts(private)) { |
| rc = -ENODEV; |
| } else /* first valid path is enough */ |
| break; |
| } |
| |
| if (!rc) |
| rc = dasd_eckd_generate_uid(device); |
| |
| return rc; |
| } |
| |
| static void do_path_verification_work(struct work_struct *work) |
| { |
| struct path_verification_work_data *data; |
| struct dasd_device *device; |
| struct dasd_eckd_private path_private; |
| struct dasd_uid *uid; |
| __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; |
| __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; |
| unsigned long flags; |
| char print_uid[60]; |
| int rc; |
| |
| data = container_of(work, struct path_verification_work_data, worker); |
| device = data->device; |
| |
| /* delay path verification until device was resumed */ |
| if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { |
| schedule_work(work); |
| return; |
| } |
| /* check if path verification already running and delay if so */ |
| if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { |
| schedule_work(work); |
| return; |
| } |
| opm = 0; |
| npm = 0; |
| ppm = 0; |
| epm = 0; |
| hpfpm = 0; |
| cablepm = 0; |
| |
| for (lpm = 0x80; lpm; lpm >>= 1) { |
| if (!(lpm & data->tbvpm)) |
| continue; |
| memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); |
| memset(&data->cqr, 0, sizeof(data->cqr)); |
| data->cqr.cpaddr = &data->ccw; |
| rc = dasd_eckd_read_conf_immediately(device, &data->cqr, |
| data->rcd_buffer, |
| lpm); |
| if (!rc) { |
| switch (dasd_eckd_path_access(data->rcd_buffer, |
| DASD_ECKD_RCD_DATA_SIZE) |
| ) { |
| case 0x02: |
| npm |= lpm; |
| break; |
| case 0x03: |
| ppm |= lpm; |
| break; |
| } |
| opm |= lpm; |
| } else if (rc == -EOPNOTSUPP) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "path verification: No configuration " |
| "data retrieved"); |
| opm |= lpm; |
| } else if (rc == -EAGAIN) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "path verification: device is stopped," |
| " try again later"); |
| epm |= lpm; |
| } else { |
| dev_warn(&device->cdev->dev, |
| "Reading device feature codes failed " |
| "(rc=%d) for new path %x\n", rc, lpm); |
| continue; |
| } |
| if (verify_fcx_max_data(device, lpm)) { |
| opm &= ~lpm; |
| npm &= ~lpm; |
| ppm &= ~lpm; |
| hpfpm |= lpm; |
| continue; |
| } |
| |
| /* |
| * save conf_data for comparison after |
| * rebuild_device_uid may have changed |
| * the original data |
| */ |
| memcpy(&path_rcd_buf, data->rcd_buffer, |
| DASD_ECKD_RCD_DATA_SIZE); |
| path_private.conf_data = (void *) &path_rcd_buf; |
| path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; |
| if (dasd_eckd_identify_conf_parts(&path_private)) { |
| path_private.conf_data = NULL; |
| path_private.conf_len = 0; |
| continue; |
| } |
| |
| /* |
| * compare path UID with device UID only if at least |
| * one valid path is left |
| * in other case the device UID may have changed and |
| * the first working path UID will be used as device UID |
| */ |
| if (dasd_path_get_opm(device) && |
| dasd_eckd_compare_path_uid(device, &path_private)) { |
| /* |
| * the comparison was not successful |
| * rebuild the device UID with at least one |
| * known path in case a z/VM hyperswap command |
| * has changed the device |
| * |
| * after this compare again |
| * |
| * if either the rebuild or the recompare fails |
| * the path can not be used |
| */ |
| if (rebuild_device_uid(device, data) || |
| dasd_eckd_compare_path_uid( |
| device, &path_private)) { |
| uid = &path_private.uid; |
| if (strlen(uid->vduit) > 0) |
| snprintf(print_uid, sizeof(print_uid), |
| "%s.%s.%04x.%02x.%s", |
| uid->vendor, uid->serial, |
| uid->ssid, uid->real_unit_addr, |
| uid->vduit); |
| else |
| snprintf(print_uid, sizeof(print_uid), |
| "%s.%s.%04x.%02x", |
| uid->vendor, uid->serial, |
| uid->ssid, |
| uid->real_unit_addr); |
| dev_err(&device->cdev->dev, |
| "The newly added channel path %02X " |
| "will not be used because it leads " |
| "to a different device %s\n", |
| lpm, print_uid); |
| opm &= ~lpm; |
| npm &= ~lpm; |
| ppm &= ~lpm; |
| cablepm |= lpm; |
| continue; |
| } |
| } |
| |
| /* |
| * There is a small chance that a path is lost again between |
| * above path verification and the following modification of |
| * the device opm mask. We could avoid that race here by using |
| * yet another path mask, but we rather deal with this unlikely |
| * situation in dasd_start_IO. |
| */ |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| if (!dasd_path_get_opm(device) && opm) { |
| dasd_path_set_opm(device, opm); |
| dasd_generic_path_operational(device); |
| } else { |
| dasd_path_add_opm(device, opm); |
| } |
| dasd_path_add_nppm(device, npm); |
| dasd_path_add_ppm(device, ppm); |
| dasd_path_add_tbvpm(device, epm); |
| dasd_path_add_cablepm(device, cablepm); |
| dasd_path_add_nohpfpm(device, hpfpm); |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| } |
| clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); |
| dasd_put_device(device); |
| if (data->isglobal) |
| mutex_unlock(&dasd_path_verification_mutex); |
| else |
| kfree(data); |
| } |
| |
| static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) |
| { |
| struct path_verification_work_data *data; |
| |
| data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); |
| if (!data) { |
| if (mutex_trylock(&dasd_path_verification_mutex)) { |
| data = path_verification_worker; |
| data->isglobal = 1; |
| } else |
| return -ENOMEM; |
| } else { |
| memset(data, 0, sizeof(*data)); |
| data->isglobal = 0; |
| } |
| INIT_WORK(&data->worker, do_path_verification_work); |
| dasd_get_device(device); |
| data->device = device; |
| data->tbvpm = lpm; |
| schedule_work(&data->worker); |
| return 0; |
| } |
| |
| static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) |
| { |
| struct dasd_eckd_private *private = device->private; |
| unsigned long flags; |
| |
| if (!private->fcx_max_data) |
| private->fcx_max_data = get_fcx_max_data(device); |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); |
| dasd_schedule_device_bh(device); |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| } |
| |
| static int dasd_eckd_read_features(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| struct dasd_psf_prssd_data *prssdp; |
| struct dasd_rssd_features *features; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| int rc; |
| |
| memset(&private->features, 0, sizeof(struct dasd_rssd_features)); |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
| (sizeof(struct dasd_psf_prssd_data) + |
| sizeof(struct dasd_rssd_features)), |
| device); |
| if (IS_ERR(cqr)) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " |
| "allocate initialization request"); |
| return PTR_ERR(cqr); |
| } |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->block = NULL; |
| cqr->retries = 256; |
| 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 = 0x41; /* Read Feature Codes */ |
| /* all other bytes of prssdp must be zero */ |
| |
| 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 - feature codes */ |
| features = (struct dasd_rssd_features *) (prssdp + 1); |
| memset(features, 0, sizeof(struct dasd_rssd_features)); |
| |
| ccw++; |
| ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
| ccw->count = sizeof(struct dasd_rssd_features); |
| ccw->cda = (__u32)(addr_t) features; |
| |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| rc = dasd_sleep_on(cqr); |
| if (rc == 0) { |
| prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
| features = (struct dasd_rssd_features *) (prssdp + 1); |
| memcpy(&private->features, features, |
| sizeof(struct dasd_rssd_features)); |
| } else |
| dev_warn(&device->cdev->dev, "Reading device feature codes" |
| " failed with rc=%d\n", rc); |
| dasd_sfree_request(cqr, cqr->memdev); |
| return rc; |
| } |
| |
| |
| /* |
| * Build CP for Perform Subsystem Function - SSC. |
| */ |
| static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, |
| int enable_pav) |
| { |
| struct dasd_ccw_req *cqr; |
| struct dasd_psf_ssc_data *psf_ssc_data; |
| struct ccw1 *ccw; |
| |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
| sizeof(struct dasd_psf_ssc_data), |
| device); |
| |
| if (IS_ERR(cqr)) { |
| DBF_DEV_EVENT(DBF_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 = 0xc0; |
| if (enable_pav) { |
| psf_ssc_data->suborder |= 0x08; |
| psf_ssc_data->reserved[0] = 0x88; |
| } |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_PSF; |
| ccw->cda = (__u32)(addr_t)psf_ssc_data; |
| ccw->count = 66; |
| |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->block = NULL; |
| cqr->retries = 256; |
| cqr->expires = 10*HZ; |
| cqr->buildclk = get_tod_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, int enable_pav, |
| unsigned long flags) |
| { |
| struct dasd_ccw_req *cqr; |
| int rc; |
| |
| cqr = dasd_eckd_build_psf_ssc(device, enable_pav); |
| if (IS_ERR(cqr)) |
| return PTR_ERR(cqr); |
| |
| /* |
| * set flags e.g. turn on failfast, to prevent blocking |
| * the calling function should handle failed requests |
| */ |
| cqr->flags |= flags; |
| |
| rc = dasd_sleep_on(cqr); |
| if (!rc) |
| /* trigger CIO to reprobe devices */ |
| css_schedule_reprobe(); |
| else if (cqr->intrc == -EAGAIN) |
| rc = -EAGAIN; |
| |
| dasd_sfree_request(cqr, cqr->memdev); |
| return rc; |
| } |
| |
| /* |
| * Valide storage server of current device. |
| */ |
| static int dasd_eckd_validate_server(struct dasd_device *device, |
| unsigned long flags) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int enable_pav, rc; |
| |
| if (private->uid.type == UA_BASE_PAV_ALIAS || |
| private->uid.type == UA_HYPER_PAV_ALIAS) |
| return 0; |
| if (dasd_nopav || MACHINE_IS_VM) |
| enable_pav = 0; |
| else |
| enable_pav = 1; |
| rc = dasd_eckd_psf_ssc(device, enable_pav, flags); |
| |
| /* may be requested feature is not available on server, |
| * therefore just report error and go ahead */ |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " |
| "returned rc=%d", private->uid.ssid, rc); |
| return rc; |
| } |
| |
| /* |
| * worker to do a validate server in case of a lost pathgroup |
| */ |
| static void dasd_eckd_do_validate_server(struct work_struct *work) |
| { |
| struct dasd_device *device = container_of(work, struct dasd_device, |
| kick_validate); |
| unsigned long flags = 0; |
| |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); |
| if (dasd_eckd_validate_server(device, flags) |
| == -EAGAIN) { |
| /* schedule worker again if failed */ |
| schedule_work(&device->kick_validate); |
| return; |
| } |
| |
| dasd_put_device(device); |
| } |
| |
| static void dasd_eckd_kick_validate_server(struct dasd_device *device) |
| { |
| dasd_get_device(device); |
| /* exit if device not online or in offline processing */ |
| if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || |
| device->state < DASD_STATE_ONLINE) { |
| dasd_put_device(device); |
| return; |
| } |
| /* queue call to do_validate_server to the kernel event daemon. */ |
| if (!schedule_work(&device->kick_validate)) |
| dasd_put_device(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 = device->private; |
| struct dasd_block *block; |
| struct dasd_uid temp_uid; |
| int rc, i; |
| int readonly; |
| unsigned long value; |
| |
| /* setup work queue for validate server*/ |
| INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); |
| /* setup work queue for summary unit check */ |
| INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); |
| |
| if (!ccw_device_is_pathgroup(device->cdev)) { |
| dev_warn(&device->cdev->dev, |
| "A channel path group could not be established\n"); |
| return -EIO; |
| } |
| if (!ccw_device_is_multipath(device->cdev)) { |
| dev_info(&device->cdev->dev, |
| "The DASD is not operating in multipath mode\n"); |
| } |
| if (!private) { |
| private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); |
| if (!private) { |
| dev_warn(&device->cdev->dev, |
| "Allocating memory for private DASD data " |
| "failed\n"); |
| return -ENOMEM; |
| } |
| device->private = private; |
| } else { |
| memset(private, 0, sizeof(*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) |
| goto out_err1; |
| |
| /* set some default values */ |
| device->default_expires = DASD_EXPIRES; |
| device->default_retries = DASD_RETRIES; |
| device->path_thrhld = DASD_ECKD_PATH_THRHLD; |
| device->path_interval = DASD_ECKD_PATH_INTERVAL; |
| |
| if (private->gneq) { |
| value = 1; |
| for (i = 0; i < private->gneq->timeout.value; i++) |
| value = 10 * value; |
| value = value * private->gneq->timeout.number; |
| /* do not accept useless values */ |
| if (value != 0 && value <= DASD_EXPIRES_MAX) |
| device->default_expires = value; |
| } |
| |
| dasd_eckd_get_uid(device, &temp_uid); |
| if (temp_uid.type == UA_BASE_DEVICE) { |
| block = dasd_alloc_block(); |
| if (IS_ERR(block)) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "could not allocate dasd " |
| "block structure"); |
| rc = PTR_ERR(block); |
| goto out_err1; |
| } |
| device->block = block; |
| block->base = device; |
| } |
| |
| /* register lcu with alias handling, enable PAV */ |
| rc = dasd_alias_make_device_known_to_lcu(device); |
| if (rc) |
| goto out_err2; |
| |
| dasd_eckd_validate_server(device, 0); |
| |
| /* device may report different configuration data after LCU setup */ |
| rc = dasd_eckd_read_conf(device); |
| if (rc) |
| goto out_err3; |
| |
| /* Read Feature Codes */ |
| dasd_eckd_read_features(device); |
| |
| /* Read Device Characteristics */ |
| rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
| &private->rdc_data, 64); |
| if (rc) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
| "Read device characteristic failed, rc=%d", rc); |
| goto out_err3; |
| } |
| |
| if ((device->features & DASD_FEATURE_USERAW) && |
| !(private->rdc_data.facilities.RT_in_LR)) { |
| dev_err(&device->cdev->dev, "The storage server does not " |
| "support raw-track access\n"); |
| rc = -EINVAL; |
| goto out_err3; |
| } |
| |
| /* find the valid cylinder size */ |
| if (private->rdc_data.no_cyl == LV_COMPAT_CYL && |
| private->rdc_data.long_no_cyl) |
| private->real_cyl = private->rdc_data.long_no_cyl; |
| else |
| private->real_cyl = private->rdc_data.no_cyl; |
| |
| private->fcx_max_data = get_fcx_max_data(device); |
| |
| readonly = dasd_device_is_ro(device); |
| if (readonly) |
| set_bit(DASD_FLAG_DEVICE_RO, &device->flags); |
| |
| dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " |
| "with %d cylinders, %d heads, %d sectors%s\n", |
| private->rdc_data.dev_type, |
| private->rdc_data.dev_model, |
| private->rdc_data.cu_type, |
| private->rdc_data.cu_model.model, |
| private->real_cyl, |
| private->rdc_data.trk_per_cyl, |
| private->rdc_data.sec_per_trk, |
| readonly ? ", read-only device" : ""); |
| return 0; |
| |
| out_err3: |
| dasd_alias_disconnect_device_from_lcu(device); |
| out_err2: |
| dasd_free_block(device->block); |
| device->block = NULL; |
| out_err1: |
| kfree(private->conf_data); |
| kfree(device->private); |
| device->private = NULL; |
| return rc; |
| } |
| |
| static void dasd_eckd_uncheck_device(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int i; |
| |
| dasd_alias_disconnect_device_from_lcu(device); |
| private->ned = NULL; |
| private->sneq = NULL; |
| private->vdsneq = NULL; |
| private->gneq = NULL; |
| private->conf_len = 0; |
| for (i = 0; i < 8; i++) { |
| kfree(device->path[i].conf_data); |
| if ((__u8 *)device->path[i].conf_data == |
| private->conf_data) { |
| private->conf_data = NULL; |
| private->conf_len = 0; |
| } |
| device->path[i].conf_data = NULL; |
| device->path[i].cssid = 0; |
| device->path[i].ssid = 0; |
| device->path[i].chpid = 0; |
| } |
| kfree(private->conf_data); |
| private->conf_data = NULL; |
| } |
| |
| static struct dasd_ccw_req * |
| dasd_eckd_analysis_ccw(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->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; |
| |
| cplength = 8; |
| datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 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->block = NULL; |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->retries = 255; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| return cqr; |
| } |
| |
| /* differentiate between 'no record found' and any other error */ |
| static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) |
| { |
| char *sense; |
| if (init_cqr->status == DASD_CQR_DONE) |
| return INIT_CQR_OK; |
| else if (init_cqr->status == DASD_CQR_NEED_ERP || |
| init_cqr->status == DASD_CQR_FAILED) { |
| sense = dasd_get_sense(&init_cqr->irb); |
| if (sense && (sense[1] & SNS1_NO_REC_FOUND)) |
| return INIT_CQR_UNFORMATTED; |
| else |
| return INIT_CQR_ERROR; |
| } else |
| return INIT_CQR_ERROR; |
| } |
| |
| /* |
| * 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_device *device = init_cqr->startdev; |
| struct dasd_eckd_private *private = device->private; |
| |
| private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); |
| dasd_sfree_request(init_cqr, device); |
| dasd_kick_device(device); |
| } |
| |
| static int dasd_eckd_start_analysis(struct dasd_block *block) |
| { |
| struct dasd_ccw_req *init_cqr; |
| |
| init_cqr = dasd_eckd_analysis_ccw(block->base); |
| 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; |
| /* first try without ERP, so we can later handle unformatted |
| * devices as special case |
| */ |
| clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); |
| init_cqr->retries = 0; |
| dasd_add_request_head(init_cqr); |
| return -EAGAIN; |
| } |
| |
| static int dasd_eckd_end_analysis(struct dasd_block *block) |
| { |
| struct dasd_device *device = block->base; |
| struct dasd_eckd_private *private = device->private; |
| struct eckd_count *count_area; |
| unsigned int sb, blk_per_trk; |
| int status, i; |
| struct dasd_ccw_req *init_cqr; |
| |
| status = private->init_cqr_status; |
| private->init_cqr_status = -1; |
| if (status == INIT_CQR_ERROR) { |
| /* try again, this time with full ERP */ |
| init_cqr = dasd_eckd_analysis_ccw(device); |
| dasd_sleep_on(init_cqr); |
| status = dasd_eckd_analysis_evaluation(init_cqr); |
| dasd_sfree_request(init_cqr, device); |
| } |
| |
| if (device->features & DASD_FEATURE_USERAW) { |
| block->bp_block = DASD_RAW_BLOCKSIZE; |
| blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; |
| block->s2b_shift = 3; |
| goto raw; |
| } |
| |
| if (status == INIT_CQR_UNFORMATTED) { |
| dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); |
| return -EMEDIUMTYPE; |
| } else if (status == INIT_CQR_ERROR) { |
| dev_err(&device->cdev->dev, |
| "Detecting the DASD disk layout failed because " |
| "of an I/O error\n"); |
| return -EIO; |
| } |
| |
| private->uses_cdl = 1; |
| /* 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->count_area[i].cyl != 0 || |
| private->count_area[i].head != count_area_head[i] || |
| private->count_area[i].record != count_area_rec[i]) { |
| 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) || |
| private->count_area[i].cyl != 0 || |
| private->count_area[i].head != count_area_head[i] || |
| private->count_area[i].record != count_area_rec[i]) |
| break; |
| } |
| if (i == 5) |
| count_area = &private->count_area[0]; |
| } else { |
| if (private->count_area[3].record == 1) |
| dev_warn(&device->cdev->dev, |
| "Track 0 has no records following the VTOC\n"); |
| } |
| |
| if (count_area != NULL && count_area->kl == 0) { |
| /* we found notthing violating our disk layout */ |
| if (dasd_check_blocksize(count_area->dl) == 0) |
| block->bp_block = count_area->dl; |
| } |
| if (block->bp_block == 0) { |
| dev_warn(&device->cdev->dev, |
| "The disk layout of the DASD is not supported\n"); |
| return -EMEDIUMTYPE; |
| } |
| block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
| for (sb = 512; sb < block->bp_block; sb = sb << 1) |
| block->s2b_shift++; |
| |
| blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); |
| |
| raw: |
| block->blocks = (private->real_cyl * |
| private->rdc_data.trk_per_cyl * |
| blk_per_trk); |
| |
| dev_info(&device->cdev->dev, |
| "DASD with %d KB/block, %d KB total size, %d KB/track, " |
| "%s\n", (block->bp_block >> 10), |
| ((private->real_cyl * |
| private->rdc_data.trk_per_cyl * |
| blk_per_trk * (block->bp_block >> 9)) >> 1), |
| ((blk_per_trk * block->bp_block) >> 10), |
| private->uses_cdl ? |
| "compatible disk layout" : "linux disk layout"); |
| |
| return 0; |
| } |
| |
| static int dasd_eckd_do_analysis(struct dasd_block *block) |
| { |
| struct dasd_eckd_private *private = block->base->private; |
| |
| if (private->init_cqr_status < 0) |
| return dasd_eckd_start_analysis(block); |
| else |
| return dasd_eckd_end_analysis(block); |
| } |
| |
| static int dasd_eckd_basic_to_ready(struct dasd_device *device) |
| { |
| return dasd_alias_add_device(device); |
| }; |
| |
| static int dasd_eckd_online_to_ready(struct dasd_device *device) |
| { |
| cancel_work_sync(&device->reload_device); |
| cancel_work_sync(&device->kick_validate); |
| return 0; |
| }; |
| |
| static int dasd_eckd_basic_to_known(struct dasd_device *device) |
| { |
| return dasd_alias_remove_device(device); |
| }; |
| |
| static int |
| dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) |
| { |
| struct dasd_eckd_private *private = block->base->private; |
| |
| if (dasd_check_blocksize(block->bp_block) == 0) { |
| geo->sectors = recs_per_track(&private->rdc_data, |
| 0, block->bp_block); |
| } |
| geo->cylinders = private->rdc_data.no_cyl; |
| geo->heads = private->rdc_data.trk_per_cyl; |
| return 0; |
| } |
| |
| /* |
| * Build the TCW request for the format check |
| */ |
| static struct dasd_ccw_req * |
| dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, |
| int enable_pav, struct eckd_count *fmt_buffer, |
| int rpt) |
| { |
| struct dasd_eckd_private *start_priv; |
| struct dasd_device *startdev = NULL; |
| struct tidaw *last_tidaw = NULL; |
| struct dasd_ccw_req *cqr; |
| struct itcw *itcw; |
| int itcw_size; |
| int count; |
| int rc; |
| int i; |
| |
| if (enable_pav) |
| startdev = dasd_alias_get_start_dev(base); |
| |
| if (!startdev) |
| startdev = base; |
| |
| start_priv = startdev->private; |
| |
| count = rpt * (fdata->stop_unit - fdata->start_unit + 1); |
| |
| /* |
| * we're adding 'count' amount of tidaw to the itcw. |
| * calculate the corresponding itcw_size |
| */ |
| itcw_size = itcw_calc_size(0, count, 0); |
| |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
| if (IS_ERR(cqr)) |
| return cqr; |
| |
| start_priv->count++; |
| |
| itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); |
| if (IS_ERR(itcw)) { |
| rc = -EINVAL; |
| goto out_err; |
| } |
| |
| cqr->cpaddr = itcw_get_tcw(itcw); |
| rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, |
| sizeof(struct eckd_count), |
| count * sizeof(struct eckd_count), 0, rpt); |
| if (rc) |
| goto out_err; |
| |
| for (i = 0; i < count; i++) { |
| last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, |
| sizeof(struct eckd_count)); |
| if (IS_ERR(last_tidaw)) { |
| rc = -EINVAL; |
| goto out_err; |
| } |
| } |
| |
| last_tidaw->flags |= TIDAW_FLAGS_LAST; |
| itcw_finalize(itcw); |
| |
| cqr->cpmode = 1; |
| cqr->startdev = startdev; |
| cqr->memdev = startdev; |
| cqr->basedev = base; |
| cqr->retries = startdev->default_retries; |
| cqr->expires = startdev->default_expires * HZ; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| /* Set flags to suppress output for expected errors */ |
| set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); |
| set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); |
| |
| return cqr; |
| |
| out_err: |
| dasd_sfree_request(cqr, startdev); |
| |
| return ERR_PTR(rc); |
| } |
| |
| /* |
| * Build the CCW request for the format check |
| */ |
| static struct dasd_ccw_req * |
| dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, |
| int enable_pav, struct eckd_count *fmt_buffer, int rpt) |
| { |
| struct dasd_eckd_private *start_priv; |
| struct dasd_eckd_private *base_priv; |
| struct dasd_device *startdev = NULL; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| void *data; |
| int cplength, datasize; |
| int use_prefix; |
| int count; |
| int i; |
| |
| if (enable_pav) |
| startdev = dasd_alias_get_start_dev(base); |
| |
| if (!startdev) |
| startdev = base; |
| |
| start_priv = startdev->private; |
| base_priv = base->private; |
| |
| count = rpt * (fdata->stop_unit - fdata->start_unit + 1); |
| |
| use_prefix = base_priv->features.feature[8] & 0x01; |
| |
| if (use_prefix) { |
| cplength = 1; |
| datasize = sizeof(struct PFX_eckd_data); |
| } else { |
| cplength = 2; |
| datasize = sizeof(struct DE_eckd_data) + |
| sizeof(struct LO_eckd_data); |
| } |
| cplength += count; |
| |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
| startdev); |
| if (IS_ERR(cqr)) |
| return cqr; |
| |
| start_priv->count++; |
| data = cqr->data; |
| ccw = cqr->cpaddr; |
| |
| if (use_prefix) { |
| prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, |
| count, 0, 0); |
| } else { |
| define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_READ_COUNT, startdev); |
| |
| data += sizeof(struct DE_eckd_data); |
| ccw[-1].flags |= CCW_FLAG_CC; |
| |
| locate_record(ccw++, data, fdata->start_unit, 0, count, |
| DASD_ECKD_CCW_READ_COUNT, base, 0); |
| } |
| |
| for (i = 0; i < count; i++) { |
| ccw[-1].flags |= CCW_FLAG_CC; |
| ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; |
| ccw->flags = CCW_FLAG_SLI; |
| ccw->count = 8; |
| ccw->cda = (__u32)(addr_t) fmt_buffer; |
| ccw++; |
| fmt_buffer++; |
| } |
| |
| cqr->startdev = startdev; |
| cqr->memdev = startdev; |
| cqr->basedev = base; |
| cqr->retries = DASD_RETRIES; |
| cqr->expires = startdev->default_expires * HZ; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| /* Set flags to suppress output for expected errors */ |
| set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); |
| |
| return cqr; |
| } |
| |
| static struct dasd_ccw_req * |
| dasd_eckd_build_format(struct dasd_device *base, |
| struct format_data_t *fdata, |
| int enable_pav) |
| { |
| struct dasd_eckd_private *base_priv; |
| struct dasd_eckd_private *start_priv; |
| struct dasd_device *startdev = NULL; |
| struct dasd_ccw_req *fcp; |
| struct eckd_count *ect; |
| struct ch_t address; |
| struct ccw1 *ccw; |
| void *data; |
| int rpt; |
| int cplength, datasize; |
| int i, j; |
| int intensity = 0; |
| int r0_perm; |
| int nr_tracks; |
| int use_prefix; |
| |
| if (enable_pav) |
| startdev = dasd_alias_get_start_dev(base); |
| |
| if (!startdev) |
| startdev = base; |
| |
| start_priv = startdev->private; |
| base_priv = base->private; |
| |
| rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); |
| |
| nr_tracks = fdata->stop_unit - fdata->start_unit + 1; |
| |
| /* |
| * 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) |
| * Bit 4: do not allow storage subsystem to modify record zero |
| * Only some bit combinations do make sense. |
| */ |
| if (fdata->intensity & 0x10) { |
| r0_perm = 0; |
| intensity = fdata->intensity & ~0x10; |
| } else { |
| r0_perm = 1; |
| intensity = fdata->intensity; |
| } |
| |
| use_prefix = base_priv->features.feature[8] & 0x01; |
| |
| switch (intensity) { |
| case 0x00: /* Normal format */ |
| case 0x08: /* Normal format, use cdl. */ |
| cplength = 2 + (rpt*nr_tracks); |
| if (use_prefix) |
| datasize = sizeof(struct PFX_eckd_data) + |
| sizeof(struct LO_eckd_data) + |
| rpt * nr_tracks * sizeof(struct eckd_count); |
| else |
| datasize = sizeof(struct DE_eckd_data) + |
| sizeof(struct LO_eckd_data) + |
| rpt * nr_tracks * sizeof(struct eckd_count); |
| break; |
| case 0x01: /* Write record zero and format track. */ |
| case 0x09: /* Write record zero and format track, use cdl. */ |
| cplength = 2 + rpt * nr_tracks; |
| if (use_prefix) |
| datasize = sizeof(struct PFX_eckd_data) + |
| sizeof(struct LO_eckd_data) + |
| sizeof(struct eckd_count) + |
| rpt * nr_tracks * sizeof(struct eckd_count); |
| else |
| datasize = sizeof(struct DE_eckd_data) + |
| sizeof(struct LO_eckd_data) + |
| sizeof(struct eckd_count) + |
| rpt * nr_tracks * sizeof(struct eckd_count); |
| break; |
| case 0x04: /* Invalidate track. */ |
| case 0x0c: /* Invalidate track, use cdl. */ |
| cplength = 3; |
| if (use_prefix) |
| datasize = sizeof(struct PFX_eckd_data) + |
| sizeof(struct LO_eckd_data) + |
| sizeof(struct eckd_count); |
| else |
| datasize = sizeof(struct DE_eckd_data) + |
| sizeof(struct LO_eckd_data) + |
| sizeof(struct eckd_count); |
| break; |
| default: |
| dev_warn(&startdev->cdev->dev, |
| "An I/O control call used incorrect flags 0x%x\n", |
| fdata->intensity); |
| return ERR_PTR(-EINVAL); |
| } |
| /* Allocate the format ccw request. */ |
| fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
| datasize, startdev); |
| if (IS_ERR(fcp)) |
| return fcp; |
| |
| start_priv->count++; |
| data = fcp->data; |
| ccw = fcp->cpaddr; |
| |
| switch (intensity & ~0x08) { |
| case 0x00: /* Normal format. */ |
| if (use_prefix) { |
| prefix(ccw++, (struct PFX_eckd_data *) data, |
| fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_WRITE_CKD, base, startdev); |
| /* grant subsystem permission to format R0 */ |
| if (r0_perm) |
| ((struct PFX_eckd_data *)data) |
| ->define_extent.ga_extended |= 0x04; |
| data += sizeof(struct PFX_eckd_data); |
| } else { |
| define_extent(ccw++, (struct DE_eckd_data *) data, |
| fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_WRITE_CKD, startdev); |
| /* grant subsystem permission to format R0 */ |
| if (r0_perm) |
| ((struct DE_eckd_data *) data) |
| ->ga_extended |= 0x04; |
| 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*nr_tracks, |
| DASD_ECKD_CCW_WRITE_CKD, base, |
| fdata->blksize); |
| data += sizeof(struct LO_eckd_data); |
| break; |
| case 0x01: /* Write record zero + format track. */ |
| if (use_prefix) { |
| prefix(ccw++, (struct PFX_eckd_data *) data, |
| fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_WRITE_RECORD_ZERO, |
| base, startdev); |
| data += sizeof(struct PFX_eckd_data); |
| } else { |
| define_extent(ccw++, (struct DE_eckd_data *) data, |
| fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); |
| 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 * nr_tracks + 1, |
| DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, |
| base->block->bp_block); |
| data += sizeof(struct LO_eckd_data); |
| break; |
| case 0x04: /* Invalidate track. */ |
| if (use_prefix) { |
| prefix(ccw++, (struct PFX_eckd_data *) data, |
| fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_WRITE_CKD, base, startdev); |
| data += sizeof(struct PFX_eckd_data); |
| } else { |
| define_extent(ccw++, (struct DE_eckd_data *) data, |
| fdata->start_unit, fdata->stop_unit, |
| DASD_ECKD_CCW_WRITE_CKD, startdev); |
| 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, base, 8); |
| data += sizeof(struct LO_eckd_data); |
| break; |
| } |
| |
| for (j = 0; j < nr_tracks; j++) { |
| /* calculate cylinder and head for the current track */ |
| set_ch_t(&address, |
| (fdata->start_unit + j) / |
| base_priv->rdc_data.trk_per_cyl, |
| (fdata->start_unit + j) % |
| base_priv->rdc_data.trk_per_cyl); |
| if (intensity & 0x01) { /* write record zero */ |
| ect = (struct eckd_count *) data; |
| data += sizeof(struct eckd_count); |
| ect->cyl = address.cyl; |
| ect->head = address.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 ((intensity & ~0x08) & 0x04) { /* erase track */ |
| ect = (struct eckd_count *) data; |
| data += sizeof(struct eckd_count); |
| ect->cyl = address.cyl; |
| ect->head = address.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 = address.cyl; |
| ect->head = address.head; |
| ect->record = i + 1; |
| ect->kl = 0; |
| ect->dl = fdata->blksize; |
| /* |
| * Check for special tracks 0-1 |
| * when formatting CDL |
| */ |
| if ((intensity & 0x08) && |
| address.cyl == 0 && address.head == 0) { |
| if (i < 3) { |
| ect->kl = 4; |
| ect->dl = sizes_trk0[i] - 4; |
| } |
| } |
| if ((intensity & 0x08) && |
| address.cyl == 0 && address.head == 1) { |
| ect->kl = 44; |
| ect->dl = LABEL_SIZE - 44; |
| } |
| ccw[-1].flags |= CCW_FLAG_CC; |
| if (i != 0 || j == 0) |
| ccw->cmd_code = |
| DASD_ECKD_CCW_WRITE_CKD; |
| else |
| ccw->cmd_code = |
| DASD_ECKD_CCW_WRITE_CKD_MT; |
| ccw->flags = CCW_FLAG_SLI; |
| ccw->count = 8; |
| ccw->cda = (__u32)(addr_t) ect; |
| ccw++; |
| } |
| } |
| } |
| |
| fcp->startdev = startdev; |
| fcp->memdev = startdev; |
| fcp->basedev = base; |
| fcp->retries = 256; |
| fcp->expires = startdev->default_expires * HZ; |
| fcp->buildclk = get_tod_clock(); |
| fcp->status = DASD_CQR_FILLED; |
| |
| return fcp; |
| } |
| |
| /* |
| * Wrapper function to build a CCW request depending on input data |
| */ |
| static struct dasd_ccw_req * |
| dasd_eckd_format_build_ccw_req(struct dasd_device *base, |
| struct format_data_t *fdata, int enable_pav, |
| int tpm, struct eckd_count *fmt_buffer, int rpt) |
| { |
| struct dasd_ccw_req *ccw_req; |
| |
| if (!fmt_buffer) { |
| ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); |
| } else { |
| if (tpm) |
| ccw_req = dasd_eckd_build_check_tcw(base, fdata, |
| enable_pav, |
| fmt_buffer, rpt); |
| else |
| ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, |
| fmt_buffer, rpt); |
| } |
| |
| return ccw_req; |
| } |
| |
| /* |
| * Sanity checks on format_data |
| */ |
| static int dasd_eckd_format_sanity_checks(struct dasd_device *base, |
| struct format_data_t *fdata) |
| { |
| struct dasd_eckd_private *private = base->private; |
| |
| if (fdata->start_unit >= |
| (private->real_cyl * private->rdc_data.trk_per_cyl)) { |
| dev_warn(&base->cdev->dev, |
| "Start track number %u used in formatting is too big\n", |
| fdata->start_unit); |
| return -EINVAL; |
| } |
| if (fdata->stop_unit >= |
| (private->real_cyl * private->rdc_data.trk_per_cyl)) { |
| dev_warn(&base->cdev->dev, |
| "Stop track number %u used in formatting is too big\n", |
| fdata->stop_unit); |
| return -EINVAL; |
| } |
| if (fdata->start_unit > fdata->stop_unit) { |
| dev_warn(&base->cdev->dev, |
| "Start track %u used in formatting exceeds end track\n", |
| fdata->start_unit); |
| return -EINVAL; |
| } |
| if (dasd_check_blocksize(fdata->blksize) != 0) { |
| dev_warn(&base->cdev->dev, |
| "The DASD cannot be formatted with block size %u\n", |
| fdata->blksize); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| /* |
| * This function will process format_data originally coming from an IOCTL |
| */ |
| static int dasd_eckd_format_process_data(struct dasd_device *base, |
| struct format_data_t *fdata, |
| int enable_pav, int tpm, |
| struct eckd_count *fmt_buffer, int rpt, |
| struct irb *irb) |
| { |
| struct dasd_eckd_private *private = base->private; |
| struct dasd_ccw_req *cqr, *n; |
| struct list_head format_queue; |
| struct dasd_device *device; |
| char *sense = NULL; |
| int old_start, old_stop, format_step; |
| int step, retry; |
| int rc; |
| |
| rc = dasd_eckd_format_sanity_checks(base, fdata); |
| if (rc) |
| return rc; |
| |
| INIT_LIST_HEAD(&format_queue); |
| |
| old_start = fdata->start_unit; |
| old_stop = fdata->stop_unit; |
| |
| if (!tpm && fmt_buffer != NULL) { |
| /* Command Mode / Format Check */ |
| format_step = 1; |
| } else if (tpm && fmt_buffer != NULL) { |
| /* Transport Mode / Format Check */ |
| format_step = DASD_CQR_MAX_CCW / rpt; |
| } else { |
| /* Normal Formatting */ |
| format_step = DASD_CQR_MAX_CCW / |
| recs_per_track(&private->rdc_data, 0, fdata->blksize); |
| } |
| |
| do { |
| retry = 0; |
| while (fdata->start_unit <= old_stop) { |
| step = fdata->stop_unit - fdata->start_unit + 1; |
| if (step > format_step) { |
| fdata->stop_unit = |
| fdata->start_unit + format_step - 1; |
| } |
| |
| cqr = dasd_eckd_format_build_ccw_req(base, fdata, |
| enable_pav, tpm, |
| fmt_buffer, rpt); |
| if (IS_ERR(cqr)) { |
| rc = PTR_ERR(cqr); |
| if (rc == -ENOMEM) { |
| if (list_empty(&format_queue)) |
| goto out; |
| /* |
| * not enough memory available, start |
| * requests retry after first requests |
| * were finished |
| */ |
| retry = 1; |
| break; |
| } |
| goto out_err; |
| } |
| list_add_tail(&cqr->blocklist, &format_queue); |
| |
| if (fmt_buffer) { |
| step = fdata->stop_unit - fdata->start_unit + 1; |
| fmt_buffer += rpt * step; |
| } |
| fdata->start_unit = fdata->stop_unit + 1; |
| fdata->stop_unit = old_stop; |
| } |
| |
| rc = dasd_sleep_on_queue(&format_queue); |
| |
| out_err: |
| list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { |
| device = cqr->startdev; |
| private = device->private; |
| |
| if (cqr->status == DASD_CQR_FAILED) { |
| /* |
| * Only get sense data if called by format |
| * check |
| */ |
| if (fmt_buffer && irb) { |
| sense = dasd_get_sense(&cqr->irb); |
| memcpy(irb, &cqr->irb, sizeof(*irb)); |
| } |
| rc = -EIO; |
| } |
| list_del_init(&cqr->blocklist); |
| dasd_sfree_request(cqr, device); |
| private->count--; |
| } |
| |
| if (rc && rc != -EIO) |
| goto out; |
| if (rc == -EIO) { |
| /* |
| * In case fewer than the expected records are on the |
| * track, we will most likely get a 'No Record Found' |
| * error (in command mode) or a 'File Protected' error |
| * (in transport mode). Those particular cases shouldn't |
| * pass the -EIO to the IOCTL, therefore reset the rc |
| * and continue. |
| */ |
| if (sense && |
| (sense[1] & SNS1_NO_REC_FOUND || |
| sense[1] & SNS1_FILE_PROTECTED)) |
| retry = 1; |
| else |
| goto out; |
| } |
| |
| } while (retry); |
| |
| out: |
| fdata->start_unit = old_start; |
| fdata->stop_unit = old_stop; |
| |
| return rc; |
| } |
| |
| static int dasd_eckd_format_device(struct dasd_device *base, |
| struct format_data_t *fdata, int enable_pav) |
| { |
| return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, |
| 0, NULL); |
| } |
| |
| /* |
| * Helper function to count consecutive records of a single track. |
| */ |
| static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, |
| int max) |
| { |
| int head; |
| int i; |
| |
| head = fmt_buffer[start].head; |
| |
| /* |
| * There are 3 conditions where we stop counting: |
| * - if data reoccurs (same head and record may reoccur), which may |
| * happen due to the way DASD_ECKD_CCW_READ_COUNT works |
| * - when the head changes, because we're iterating over several tracks |
| * then (DASD_ECKD_CCW_READ_COUNT_MT) |
| * - when we've reached the end of sensible data in the buffer (the |
| * record will be 0 then) |
| */ |
| for (i = start; i < max; i++) { |
| if (i > start) { |
| if ((fmt_buffer[i].head == head && |
| fmt_buffer[i].record == 1) || |
| fmt_buffer[i].head != head || |
| fmt_buffer[i].record == 0) |
| break; |
| } |
| } |
| |
| return i - start; |
| } |
| |
| /* |
| * Evaluate a given range of tracks. Data like number of records, blocksize, |
| * record ids, and key length are compared with expected data. |
| * |
| * If a mismatch occurs, the corresponding error bit is set, as well as |
| * additional information, depending on the error. |
| */ |
| static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, |
| struct format_check_t *cdata, |
| int rpt_max, int rpt_exp, |
| int trk_per_cyl, int tpm) |
| { |
| struct ch_t geo; |
| int max_entries; |
| int count = 0; |
| int trkcount; |
| int blksize; |
| int pos = 0; |
| int i, j; |
| int kl; |
| |
| trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; |
| max_entries = trkcount * rpt_max; |
| |
| for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { |
| /* Calculate the correct next starting position in the buffer */ |
| if (tpm) { |
| while (fmt_buffer[pos].record == 0 && |
| fmt_buffer[pos].dl == 0) { |
| if (pos++ > max_entries) |
| break; |
| } |
| } else { |
| if (i != cdata->expect.start_unit) |
| pos += rpt_max - count; |
| } |
| |
| /* Calculate the expected geo values for the current track */ |
| set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); |
| |
| /* Count and check number of records */ |
| count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); |
| |
| if (count < rpt_exp) { |
| cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; |
| break; |
| } |
| if (count > rpt_exp) { |
| cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; |
| break; |
| } |
| |
| for (j = 0; j < count; j++, pos++) { |
| blksize = cdata->expect.blksize; |
| kl = 0; |
| |
| /* |
| * Set special values when checking CDL formatted |
| * devices. |
| */ |
| if ((cdata->expect.intensity & 0x08) && |
| geo.cyl == 0 && geo.head == 0) { |
| if (j < 3) { |
| blksize = sizes_trk0[j] - 4; |
| kl = 4; |
| } |
| } |
| if ((cdata->expect.intensity & 0x08) && |
| geo.cyl == 0 && geo.head == 1) { |
| blksize = LABEL_SIZE - 44; |
| kl = 44; |
| } |
| |
| /* Check blocksize */ |
| if (fmt_buffer[pos].dl != blksize) { |
| cdata->result = DASD_FMT_ERR_BLKSIZE; |
| goto out; |
| } |
| /* Check if key length is 0 */ |
| if (fmt_buffer[pos].kl != kl) { |
| cdata->result = DASD_FMT_ERR_KEY_LENGTH; |
| goto out; |
| } |
| /* Check if record_id is correct */ |
| if (fmt_buffer[pos].cyl != geo.cyl || |
| fmt_buffer[pos].head != geo.head || |
| fmt_buffer[pos].record != (j + 1)) { |
| cdata->result = DASD_FMT_ERR_RECORD_ID; |
| goto out; |
| } |
| } |
| } |
| |
| out: |
| /* |
| * In case of no errors, we need to decrease by one |
| * to get the correct positions. |
| */ |
| if (!cdata->result) { |
| i--; |
| pos--; |
| } |
| |
| cdata->unit = i; |
| cdata->num_records = count; |
| cdata->rec = fmt_buffer[pos].record; |
| cdata->blksize = fmt_buffer[pos].dl; |
| cdata->key_length = fmt_buffer[pos].kl; |
| } |
| |
| /* |
| * Check the format of a range of tracks of a DASD. |
| */ |
| static int dasd_eckd_check_device_format(struct dasd_device *base, |
| struct format_check_t *cdata, |
| int enable_pav) |
| { |
| struct dasd_eckd_private *private = base->private; |
| struct eckd_count *fmt_buffer; |
| struct irb irb; |
| int rpt_max, rpt_exp; |
| int fmt_buffer_size; |
| int trk_per_cyl; |
| int trkcount; |
| int tpm = 0; |
| int rc; |
| |
| trk_per_cyl = private->rdc_data.trk_per_cyl; |
| |
| /* Get maximum and expected amount of records per track */ |
| rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; |
| rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); |
| |
| trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; |
| fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); |
| |
| fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); |
| if (!fmt_buffer) |
| return -ENOMEM; |
| |
| /* |
| * A certain FICON feature subset is needed to operate in transport |
| * mode. Additionally, the support for transport mode is implicitly |
| * checked by comparing the buffer size with fcx_max_data. As long as |
| * the buffer size is smaller we can operate in transport mode and |
| * process multiple tracks. If not, only one track at once is being |
| * processed using command mode. |
| */ |
| if ((private->features.feature[40] & 0x04) && |
| fmt_buffer_size <= private->fcx_max_data) |
| tpm = 1; |
| |
| rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, |
| tpm, fmt_buffer, rpt_max, &irb); |
| if (rc && rc != -EIO) |
| goto out; |
| if (rc == -EIO) { |
| /* |
| * If our first attempt with transport mode enabled comes back |
| * with an incorrect length error, we're going to retry the |
| * check with command mode. |
| */ |
| if (tpm && scsw_cstat(&irb.scsw) == 0x40) { |
| tpm = 0; |
| rc = dasd_eckd_format_process_data(base, &cdata->expect, |
| enable_pav, tpm, |
| fmt_buffer, rpt_max, |
| &irb); |
| if (rc) |
| goto out; |
| } else { |
| goto out; |
| } |
| } |
| |
| dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, |
| trk_per_cyl, tpm); |
| |
| out: |
| kfree(fmt_buffer); |
| |
| return rc; |
| } |
| |
| static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) |
| { |
| if (cqr->retries < 0) { |
| cqr->status = DASD_CQR_FAILED; |
| return; |
| } |
| cqr->status = DASD_CQR_FILLED; |
| if (cqr->block && (cqr->startdev != cqr->block->base)) { |
| dasd_eckd_reset_ccw_to_base_io(cqr); |
| cqr->startdev = cqr->block->base; |
| cqr->lpm = dasd_path_get_opm(cqr->block->base); |
| } |
| }; |
| |
| static dasd_erp_fn_t |
| dasd_eckd_erp_action(struct dasd_ccw_req * cqr) |
| { |
| struct dasd_device *device = (struct dasd_device *) cqr->startdev; |
| 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 void dasd_eckd_check_for_device_change(struct dasd_device *device, |
| struct dasd_ccw_req *cqr, |
| struct irb *irb) |
| { |
| char mask; |
| char *sense = NULL; |
| struct dasd_eckd_private *private = device->private; |
| |
| /* first of all check for state change pending interrupt */ |
| mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; |
| if ((scsw_dstat(&irb->scsw) & mask) == mask) { |
| /* |
| * for alias only, not in offline processing |
| * and only if not suspended |
| */ |
| if (!device->block && private->lcu && |
| device->state == DASD_STATE_ONLINE && |
| !test_bit(DASD_FLAG_OFFLINE, &device->flags) && |
| !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { |
| /* schedule worker to reload device */ |
| dasd_reload_device(device); |
| } |
| dasd_generic_handle_state_change(device); |
| return; |
| } |
| |
| sense = dasd_get_sense(irb); |
| if (!sense) |
| return; |
| |
| /* summary unit check */ |
| if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && |
| (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { |
| if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "eckd suc: device already notified"); |
| return; |
| } |
| sense = dasd_get_sense(irb); |
| if (!sense) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "eckd suc: no reason code available"); |
| clear_bit(DASD_FLAG_SUC, &device->flags); |
| return; |
| |
| } |
| private->suc_reason = sense[8]; |
| DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", |
| "eckd handle summary unit check: reason", |
| private->suc_reason); |
| dasd_get_device(device); |
| if (!schedule_work(&device->suc_work)) |
| dasd_put_device(device); |
| |
| return; |
| } |
| |
| /* service information message SIM */ |
| if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && |
| ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { |
| dasd_3990_erp_handle_sim(device, sense); |
| return; |
| } |
| |
| /* loss of device reservation is handled via base devices only |
| * as alias devices may be used with several bases |
| */ |
| if (device->block && (sense[27] & DASD_SENSE_BIT_0) && |
| (sense[7] == 0x3F) && |
| (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && |
| test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { |
| if (device->features & DASD_FEATURE_FAILONSLCK) |
| set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); |
| clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); |
| dev_err(&device->cdev->dev, |
| "The device reservation was lost\n"); |
| } |
| } |
| |
| static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( |
| struct dasd_device *startdev, |
| struct dasd_block *block, |
| struct request *req, |
| sector_t first_rec, |
| sector_t last_rec, |
| sector_t first_trk, |
| sector_t last_trk, |
| unsigned int first_offs, |
| unsigned int last_offs, |
| unsigned int blk_per_trk, |
| unsigned int blksize) |
| { |
| struct dasd_eckd_private *private; |
| unsigned long *idaws; |
| struct LO_eckd_data *LO_data; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| struct req_iterator iter; |
| struct bio_vec bv; |
| char *dst; |
| unsigned int off; |
| int count, cidaw, cplength, datasize; |
| sector_t recid; |
| unsigned char cmd, rcmd; |
| int use_prefix; |
| struct dasd_device *basedev; |
| |
| basedev = block->base; |
| private = basedev->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); |
| |
| /* Check struct bio and count the number of blocks for the request. */ |
| count = 0; |
| cidaw = 0; |
| rq_for_each_segment(bv, req, iter) { |
| if (bv.bv_len & (blksize - 1)) |
| /* Eckd can only do full blocks. */ |
| return ERR_PTR(-EINVAL); |
| count += bv.bv_len >> (block->s2b_shift + 9); |
| if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
| cidaw += bv.bv_len >> (block->s2b_shift + 9); |
| } |
| /* Paranoia. */ |
| if (count != last_rec - first_rec + 1) |
| return ERR_PTR(-EINVAL); |
| |
| /* use the prefix command if available */ |
| use_prefix = private->features.feature[8] & 0x01; |
| if (use_prefix) { |
| /* 1x prefix + number of blocks */ |
| cplength = 2 + count; |
| /* 1x prefix + cidaws*sizeof(long) */ |
| datasize = sizeof(struct PFX_eckd_data) + |
| sizeof(struct LO_eckd_data) + |
| cidaw * sizeof(unsigned long); |
| } else { |
| /* 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_MAGIC, cplength, datasize, |
| startdev); |
| if (IS_ERR(cqr)) |
| return cqr; |
| ccw = cqr->cpaddr; |
| /* First ccw is define extent or prefix. */ |
| if (use_prefix) { |
| if (prefix(ccw++, cqr->data, first_trk, |
| last_trk, cmd, basedev, startdev) == -EAGAIN) { |
| /* Clock not in sync and XRC is enabled. |
| * Try again later. |
| */ |
| dasd_sfree_request(cqr, startdev); |
| return ERR_PTR(-EAGAIN); |
| } |
| idaws = (unsigned long *) (cqr->data + |
| sizeof(struct PFX_eckd_data)); |
| } else { |
| if (define_extent(ccw++, cqr->data, first_trk, |
| last_trk, cmd, basedev) == -EAGAIN) { |
| /* Clock not in sync and XRC is enabled. |
| * Try again later. |
| */ |
| dasd_sfree_request(cqr, startdev); |
| return ERR_PTR(-EAGAIN); |
| } |
| idaws = (unsigned long *) (cqr->data + |
| sizeof(struct DE_eckd_data)); |
| } |
| /* Build locate_record+read/write/ccws. */ |
| 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, basedev, blksize); |
| } |
| rq_for_each_segment(bv, req, iter) { |
| dst = page_address(bv.bv_page) + bv.bv_offset; |
| if (dasd_page_cache) { |
| char *copy = kmem_cache_alloc(dasd_page_cache, |
| GFP_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, basedev, 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, basedev, 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 (blk_noretry_request(req) || |
| block->base->features & DASD_FEATURE_FAILFAST) |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| cqr->startdev = startdev; |
| cqr->memdev = startdev; |
| cqr->block = block; |
| cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
| cqr->lpm = dasd_path_get_ppm(startdev); |
| cqr->retries = startdev->default_retries; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| return cqr; |
| } |
| |
| static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( |
| struct dasd_device *startdev, |
| struct dasd_block *block, |
| struct request *req, |
| sector_t first_rec, |
| sector_t last_rec, |
| sector_t first_trk, |
| sector_t last_trk, |
| unsigned int first_offs, |
| unsigned int last_offs, |
| unsigned int blk_per_trk, |
| unsigned int blksize) |
| { |
| unsigned long *idaws; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| struct req_iterator iter; |
| struct bio_vec bv; |
| char *dst, *idaw_dst; |
| unsigned int cidaw, cplength, datasize; |
| unsigned int tlf; |
| sector_t recid; |
| unsigned char cmd; |
| struct dasd_device *basedev; |
| unsigned int trkcount, count, count_to_trk_end; |
| unsigned int idaw_len, seg_len, part_len, len_to_track_end; |
| unsigned char new_track, end_idaw; |
| sector_t trkid; |
| unsigned int recoffs; |
| |
| basedev = block->base; |
| if (rq_data_dir(req) == READ) |
| cmd = DASD_ECKD_CCW_READ_TRACK_DATA; |
| else if (rq_data_dir(req) == WRITE) |
| cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; |
| else |
| return ERR_PTR(-EINVAL); |
| |
| /* Track based I/O needs IDAWs for each page, and not just for |
| * 64 bit addresses. We need additional idals for pages |
| * that get filled from two tracks, so we use the number |
| * of records as upper limit. |
| */ |
| cidaw = last_rec - first_rec + 1; |
| trkcount = last_trk - first_trk + 1; |
| |
| /* 1x prefix + one read/write ccw per track */ |
| cplength = 1 + trkcount; |
| |
| /* on 31-bit we need space for two 32 bit addresses per page |
| * on 64-bit one 64 bit address |
| */ |
| datasize = sizeof(struct PFX_eckd_data) + |
| cidaw * sizeof(unsigned long long); |
| |
| /* Allocate the ccw request. */ |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, |
| startdev); |
| if (IS_ERR(cqr)) |
| return cqr; |
| ccw = cqr->cpaddr; |
| /* transfer length factor: how many bytes to read from the last track */ |
| if (first_trk == last_trk) |
| tlf = last_offs - first_offs + 1; |
| else |
| tlf = last_offs + 1; |
| tlf *= blksize; |
| |
| if (prefix_LRE(ccw++, cqr->data, first_trk, |
| last_trk, cmd, basedev, startdev, |
| 1 /* format */, first_offs + 1, |
| trkcount, blksize, |
| tlf) == -EAGAIN) { |
| /* Clock not in sync and XRC is enabled. |
| * Try again later. |
| */ |
| dasd_sfree_request(cqr, startdev); |
| return ERR_PTR(-EAGAIN); |
| } |
| |
| /* |
| * The translation of request into ccw programs must meet the |
| * following conditions: |
| * - all idaws but the first and the last must address full pages |
| * (or 2K blocks on 31-bit) |
| * - the scope of a ccw and it's idal ends with the track boundaries |
| */ |
| idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); |
| recid = first_rec; |
| new_track = 1; |
| end_idaw = 0; |
| len_to_track_end = 0; |
| idaw_dst = NULL; |
| idaw_len = 0; |
| rq_for_each_segment(bv, req, iter) { |
| dst = page_address(bv.bv_page) + bv.bv_offset; |
| seg_len = bv.bv_len; |
| while (seg_len) { |
| if (new_track) { |
| trkid = recid; |
| recoffs = sector_div(trkid, blk_per_trk); |
| count_to_trk_end = blk_per_trk - recoffs; |
| count = min((last_rec - recid + 1), |
| (sector_t)count_to_trk_end); |
| len_to_track_end = count * blksize; |
| ccw[-1].flags |= CCW_FLAG_CC; |
| ccw->cmd_code = cmd; |
| ccw->count = len_to_track_end; |
| ccw->cda = (__u32)(addr_t)idaws; |
| ccw->flags = CCW_FLAG_IDA; |
| ccw++; |
| recid += count; |
| new_track = 0; |
| /* first idaw for a ccw may start anywhere */ |
| if (!idaw_dst) |
| idaw_dst = dst; |
| } |
| /* If we start a new idaw, we must make sure that it |
| * starts on an IDA_BLOCK_SIZE boundary. |
| * If we continue an idaw, we must make sure that the |
| * current segment begins where the so far accumulated |
| * idaw ends |
| */ |
| if (!idaw_dst) { |
| if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { |
| dasd_sfree_request(cqr, startdev); |
| return ERR_PTR(-ERANGE); |
| } else |
| idaw_dst = dst; |
| } |
| if ((idaw_dst + idaw_len) != dst) { |
| dasd_sfree_request(cqr, startdev); |
| return ERR_PTR(-ERANGE); |
| } |
| part_len = min(seg_len, len_to_track_end); |
| seg_len -= part_len; |
| dst += part_len; |
| idaw_len += part_len; |
| len_to_track_end -= part_len; |
| /* collected memory area ends on an IDA_BLOCK border, |
| * -> create an idaw |
| * idal_create_words will handle cases where idaw_len |
| * is larger then IDA_BLOCK_SIZE |
| */ |
| if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) |
| end_idaw = 1; |
| /* We also need to end the idaw at track end */ |
| if (!len_to_track_end) { |
| new_track = 1; |
| end_idaw = 1; |
| } |
| if (end_idaw) { |
| idaws = idal_create_words(idaws, idaw_dst, |
| idaw_len); |
| idaw_dst = NULL; |
| idaw_len = 0; |
| end_idaw = 0; |
| } |
| } |
| } |
| |
| if (blk_noretry_request(req) || |
| block->base->features & DASD_FEATURE_FAILFAST) |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| cqr->startdev = startdev; |
| cqr->memdev = startdev; |
| cqr->block = block; |
| cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
| cqr->lpm = dasd_path_get_ppm(startdev); |
| cqr->retries = startdev->default_retries; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| return cqr; |
| } |
| |
| static int prepare_itcw(struct itcw *itcw, |
| unsigned int trk, unsigned int totrk, int cmd, |
| struct dasd_device *basedev, |
| struct dasd_device *startdev, |
| unsigned int rec_on_trk, int count, |
| unsigned int blksize, |
| unsigned int total_data_size, |
| unsigned int tlf, |
| unsigned int blk_per_trk) |
| { |
| struct PFX_eckd_data pfxdata; |
| struct dasd_eckd_private *basepriv, *startpriv; |
| struct DE_eckd_data *dedata; |
| struct LRE_eckd_data *lredata; |
| struct dcw *dcw; |
| |
| u32 begcyl, endcyl; |
| u16 heads, beghead, endhead; |
| u8 pfx_cmd; |
| |
| int rc = 0; |
| int sector = 0; |
| int dn, d; |
| |
| |
| /* setup prefix data */ |
| basepriv = basedev->private; |
| startpriv = startdev->private; |
| dedata = &pfxdata.define_extent; |
| lredata = &pfxdata.locate_record; |
| |
| memset(&pfxdata, 0, sizeof(pfxdata)); |
| pfxdata.format = 1; /* PFX with LRE */ |
| pfxdata.base_address = basepriv->ned->unit_addr; |
| pfxdata.base_lss = basepriv->ned->ID; |
| pfxdata.validity.define_extent = 1; |
| |
| /* private uid is kept up to date, conf_data may be outdated */ |
| if (startpriv->uid.type != UA_BASE_DEVICE) { |
| pfxdata.validity.verify_base = 1; |
| if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) |
| pfxdata.validity.hyper_pav = 1; |
| } |
| |
| switch (cmd) { |
| case DASD_ECKD_CCW_READ_TRACK_DATA: |
| dedata->mask.perm = 0x1; |
| dedata->attributes.operation = basepriv->attrib.operation; |
| dedata->blk_size = blksize; |
| dedata->ga_extended |= 0x42; |
| lredata->operation.orientation = 0x0; |
| lredata->operation.operation = 0x0C; |
| lredata->auxiliary.check_bytes = 0x01; |
| pfx_cmd = DASD_ECKD_CCW_PFX_READ; |
| break; |
| case DASD_ECKD_CCW_WRITE_TRACK_DATA: |
| dedata->mask.perm = 0x02; |
| dedata->attributes.operation = basepriv->attrib.operation; |
| dedata->blk_size = blksize; |
| rc = check_XRC_on_prefix(&pfxdata, basedev); |
| dedata->ga_extended |= 0x42; |
| lredata->operation.orientation = 0x0; |
| lredata->operation.operation = 0x3F; |
| lredata->extended_operation = 0x23; |
| lredata->auxiliary.check_bytes = 0x2; |
| pfx_cmd = DASD_ECKD_CCW_PFX; |
| break; |
| case DASD_ECKD_CCW_READ_COUNT_MT: |
| dedata->mask.perm = 0x1; |
| dedata->attributes.operation = DASD_BYPASS_CACHE; |
| dedata->ga_extended |= 0x42; |
| dedata->blk_size = blksize; |
| lredata->operation.orientation = 0x2; |
| lredata->operation.operation = 0x16; |
| lredata->auxiliary.check_bytes = 0x01; |
| pfx_cmd = DASD_ECKD_CCW_PFX_READ; |
| break; |
| default: |
| DBF_DEV_EVENT(DBF_ERR, basedev, |
| "prepare itcw, unknown opcode 0x%x", cmd); |
| BUG(); |
| break; |
| } |
| if (rc) |
| return rc; |
| |
| dedata->attributes.mode = 0x3; /* ECKD */ |
| |
| heads = basepriv->rdc_data.trk_per_cyl; |
| begcyl = trk / heads; |
| beghead = trk % heads; |
| endcyl = totrk / heads; |
| endhead = totrk % heads; |
| |
| /* check for sequential prestage - enhance cylinder range */ |
| if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || |
| dedata->attributes.operation == DASD_SEQ_ACCESS) { |
| |
| if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) |
| endcyl += basepriv->attrib.nr_cyl; |
| else |
| endcyl = (basepriv->real_cyl - 1); |
| } |
| |
| set_ch_t(&dedata->beg_ext, begcyl, beghead); |
| set_ch_t(&dedata->end_ext, endcyl, endhead); |
| |
| dedata->ep_format = 0x20; /* records per track is valid */ |
| dedata->ep_rec_per_track = blk_per_trk; |
| |
| if (rec_on_trk) { |
| switch (basepriv->rdc_data.dev_type) { |
| case 0x3390: |
| dn = ceil_quot(blksize + 6, 232); |
| d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); |
| sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; |
| break; |
| case 0x3380: |
| d = 7 + ceil_quot(blksize + 12, 32); |
| sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; |
| break; |
| } |
| } |
| |
| if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { |
| lredata->auxiliary.length_valid = 0; |
| lredata->auxiliary.length_scope = 0; |
| lredata->sector = 0xff; |
| } else { |
| lredata->auxiliary.length_valid = 1; |
| lredata->auxiliary.length_scope = 1; |
| lredata->sector = sector; |
| } |
| lredata->auxiliary.imbedded_ccw_valid = 1; |
| lredata->length = tlf; |
| lredata->imbedded_ccw = cmd; |
| lredata->count = count; |
| set_ch_t(&lredata->seek_addr, begcyl, beghead); |
| lredata->search_arg.cyl = lredata->seek_addr.cyl; |
| lredata->search_arg.head = lredata->seek_addr.head; |
| lredata->search_arg.record = rec_on_trk; |
| |
| dcw = itcw_add_dcw(itcw, pfx_cmd, 0, |
| &pfxdata, sizeof(pfxdata), total_data_size); |
| return PTR_RET(dcw); |
| } |
| |
| static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( |
| struct dasd_device *startdev, |
| struct dasd_block *block, |
| struct request *req, |
| sector_t first_rec, |
| sector_t last_rec, |
| sector_t first_trk, |
| sector_t last_trk, |
| unsigned int first_offs, |
| unsigned int last_offs, |
| unsigned int blk_per_trk, |
| unsigned int blksize) |
| { |
| struct dasd_ccw_req *cqr; |
| struct req_iterator iter; |
| struct bio_vec bv; |
| char *dst; |
| unsigned int trkcount, ctidaw; |
| unsigned char cmd; |
| struct dasd_device *basedev; |
| unsigned int tlf; |
| struct itcw *itcw; |
| struct tidaw *last_tidaw = NULL; |
| int itcw_op; |
| size_t itcw_size; |
| u8 tidaw_flags; |
| unsigned int seg_len, part_len, len_to_track_end; |
| unsigned char new_track; |
| sector_t recid, trkid; |
| unsigned int offs; |
| unsigned int count, count_to_trk_end; |
| int ret; |
| |
| basedev = block->base; |
| if (rq_data_dir(req) == READ) { |
| cmd = DASD_ECKD_CCW_READ_TRACK_DATA; |
| itcw_op = ITCW_OP_READ; |
| } else if (rq_data_dir(req) == WRITE) { |
| cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; |
| itcw_op = ITCW_OP_WRITE; |
| } else |
| return ERR_PTR(-EINVAL); |
| |
| /* trackbased I/O needs address all memory via TIDAWs, |
| * not just for 64 bit addresses. This allows us to map |
| * each segment directly to one tidaw. |
| * In the case of write requests, additional tidaws may |
| * be needed when a segment crosses a track boundary. |
| */ |
| trkcount = last_trk - first_trk + 1; |
| ctidaw = 0; |
| rq_for_each_segment(bv, req, iter) { |
| ++ctidaw; |
| } |
| if (rq_data_dir(req) == WRITE) |
| ctidaw += (last_trk - first_trk); |
| |
| /* Allocate the ccw request. */ |
| itcw_size = itcw_calc_size(0, ctidaw, 0); |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); |
| if (IS_ERR(cqr)) |
| return cqr; |
| |
| /* transfer length factor: how many bytes to read from the last track */ |
| if (first_trk == last_trk) |
| tlf = last_offs - first_offs + 1; |
| else |
| tlf = last_offs + 1; |
| tlf *= blksize; |
| |
| itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); |
| if (IS_ERR(itcw)) { |
| ret = -EINVAL; |
| goto out_error; |
| } |
| cqr->cpaddr = itcw_get_tcw(itcw); |
| if (prepare_itcw(itcw, first_trk, last_trk, |
| cmd, basedev, startdev, |
| first_offs + 1, |
| trkcount, blksize, |
| (last_rec - first_rec + 1) * blksize, |
| tlf, blk_per_trk) == -EAGAIN) { |
| /* Clock not in sync and XRC is enabled. |
| * Try again later. |
| */ |
| ret = -EAGAIN; |
| goto out_error; |
| } |
| len_to_track_end = 0; |
| /* |
| * A tidaw can address 4k of memory, but must not cross page boundaries |
| * We can let the block layer handle this by setting |
| * blk_queue_segment_boundary to page boundaries and |
| * blk_max_segment_size to page size when setting up the request queue. |
| * For write requests, a TIDAW must not cross track boundaries, because |
| * we have to set the CBC flag on the last tidaw for each track. |
| */ |
| if (rq_data_dir(req) == WRITE) { |
| new_track = 1; |
| recid = first_rec; |
| rq_for_each_segment(bv, req, iter) { |
| dst = page_address(bv.bv_page) + bv.bv_offset; |
| seg_len = bv.bv_len; |
| while (seg_len) { |
| if (new_track) { |
| trkid = recid; |
| offs = sector_div(trkid, blk_per_trk); |
| count_to_trk_end = blk_per_trk - offs; |
| count = min((last_rec - recid + 1), |
| (sector_t)count_to_trk_end); |
| len_to_track_end = count * blksize; |
| recid += count; |
| new_track = 0; |
| } |
| part_len = min(seg_len, len_to_track_end); |
| seg_len -= part_len; |
| len_to_track_end -= part_len; |
| /* We need to end the tidaw at track end */ |
| if (!len_to_track_end) { |
| new_track = 1; |
| tidaw_flags = TIDAW_FLAGS_INSERT_CBC; |
| } else |
| tidaw_flags = 0; |
| last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, |
| dst, part_len); |
| if (IS_ERR(last_tidaw)) { |
| ret = -EINVAL; |
| goto out_error; |
| } |
| dst += part_len; |
| } |
| } |
| } else { |
| rq_for_each_segment(bv, req, iter) { |
| dst = page_address(bv.bv_page) + bv.bv_offset; |
| last_tidaw = itcw_add_tidaw(itcw, 0x00, |
| dst, bv.bv_len); |
| if (IS_ERR(last_tidaw)) { |
| ret = -EINVAL; |
| goto out_error; |
| } |
| } |
| } |
| last_tidaw->flags |= TIDAW_FLAGS_LAST; |
| last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; |
| itcw_finalize(itcw); |
| |
| if (blk_noretry_request(req) || |
| block->base->features & DASD_FEATURE_FAILFAST) |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| cqr->cpmode = 1; |
| cqr->startdev = startdev; |
| cqr->memdev = startdev; |
| cqr->block = block; |
| cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ |
| cqr->lpm = dasd_path_get_ppm(startdev); |
| cqr->retries = startdev->default_retries; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| return cqr; |
| out_error: |
| dasd_sfree_request(cqr, startdev); |
| return ERR_PTR(ret); |
| } |
| |
| static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, |
| struct dasd_block *block, |
| struct request *req) |
| { |
| int cmdrtd, cmdwtd; |
| int use_prefix; |
| int fcx_multitrack; |
| struct dasd_eckd_private *private; |
| struct dasd_device *basedev; |
| sector_t first_rec, last_rec; |
| sector_t first_trk, last_trk; |
| unsigned int first_offs, last_offs; |
| unsigned int blk_per_trk, blksize; |
| int cdlspecial; |
| unsigned int data_size; |
| struct dasd_ccw_req *cqr; |
| |
| basedev = block->base; |
| private = basedev->private; |
| |
| /* Calculate number of blocks/records per track. */ |
| blksize = block->bp_block; |
| blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
| if (blk_per_trk == 0) |
| return ERR_PTR(-EINVAL); |
| /* Calculate record id of first and last block. */ |
| first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; |
| first_offs = sector_div(first_trk, blk_per_trk); |
| last_rec = last_trk = |
| (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
| last_offs = sector_div(last_trk, blk_per_trk); |
| cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); |
| |
| fcx_multitrack = private->features.feature[40] & 0x20; |
| data_size = blk_rq_bytes(req); |
| if (data_size % blksize) |
| return ERR_PTR(-EINVAL); |
| /* tpm write request add CBC data on each track boundary */ |
| if (rq_data_dir(req) == WRITE) |
| data_size += (last_trk - first_trk) * 4; |
| |
| /* is read track data and write track data in command mode supported? */ |
| cmdrtd = private->features.feature[9] & 0x20; |
| cmdwtd = private->features.feature[12] & 0x40; |
| use_prefix = private->features.feature[8] & 0x01; |
| |
| cqr = NULL; |
| if (cdlspecial || dasd_page_cache) { |
| /* do nothing, just fall through to the cmd mode single case */ |
| } else if ((data_size <= private->fcx_max_data) |
| && (fcx_multitrack || (first_trk == last_trk))) { |
| cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, |
| first_rec, last_rec, |
| first_trk, last_trk, |
| first_offs, last_offs, |
| blk_per_trk, blksize); |
| if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
| (PTR_ERR(cqr) != -ENOMEM)) |
| cqr = NULL; |
| } else if (use_prefix && |
| (((rq_data_dir(req) == READ) && cmdrtd) || |
| ((rq_data_dir(req) == WRITE) && cmdwtd))) { |
| cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, |
| first_rec, last_rec, |
| first_trk, last_trk, |
| first_offs, last_offs, |
| blk_per_trk, blksize); |
| if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && |
| (PTR_ERR(cqr) != -ENOMEM)) |
| cqr = NULL; |
| } |
| if (!cqr) |
| cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, |
| first_rec, last_rec, |
| first_trk, last_trk, |
| first_offs, last_offs, |
| blk_per_trk, blksize); |
| return cqr; |
| } |
| |
| static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, |
| struct dasd_block *block, |
| struct request *req) |
| { |
| unsigned long *idaws; |
| struct dasd_device *basedev; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| struct req_iterator iter; |
| struct bio_vec bv; |
| char *dst; |
| unsigned char cmd; |
| unsigned int trkcount; |
| unsigned int seg_len, len_to_track_end; |
| unsigned int first_offs; |
| unsigned int cidaw, cplength, datasize; |
| sector_t first_trk, last_trk, sectors; |
| sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; |
| unsigned int pfx_datasize; |
| |
| /* |
| * raw track access needs to be mutiple of 64k and on 64k boundary |
| * For read requests we can fix an incorrect alignment by padding |
| * the request with dummy pages. |
| */ |
| start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; |
| end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % |
| DASD_RAW_SECTORS_PER_TRACK; |
| end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % |
| DASD_RAW_SECTORS_PER_TRACK; |
| basedev = block->base; |
| if ((start_padding_sectors || end_padding_sectors) && |
| (rq_data_dir(req) == WRITE)) { |
| DBF_DEV_EVENT(DBF_ERR, basedev, |
| "raw write not track aligned (%lu,%lu) req %p", |
| start_padding_sectors, end_padding_sectors, req); |
| cqr = ERR_PTR(-EINVAL); |
| goto out; |
| } |
| |
| first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; |
| last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / |
| DASD_RAW_SECTORS_PER_TRACK; |
| trkcount = last_trk - first_trk + 1; |
| first_offs = 0; |
| |
| if (rq_data_dir(req) == READ) |
| cmd = DASD_ECKD_CCW_READ_TRACK; |
| else if (rq_data_dir(req) == WRITE) |
| cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; |
| else { |
| cqr = ERR_PTR(-EINVAL); |
| goto out; |
| } |
| |
| /* |
| * Raw track based I/O needs IDAWs for each page, |
| * and not just for 64 bit addresses. |
| */ |
| cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; |
| |
| /* 1x prefix + one read/write ccw per track */ |
| cplength = 1 + trkcount; |
| |
| /* |
| * struct PFX_eckd_data has up to 2 byte as extended parameter |
| * this is needed for write full track and has to be mentioned |
| * separately |
| * add 8 instead of 2 to keep 8 byte boundary |
| */ |
| pfx_datasize = sizeof(struct PFX_eckd_data) + 8; |
| |
| datasize = pfx_datasize + cidaw * sizeof(unsigned long long); |
| |
| /* Allocate the ccw request. */ |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, |
| datasize, startdev); |
| if (IS_ERR(cqr)) |
| goto out; |
| ccw = cqr->cpaddr; |
| |
| if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, |
| basedev, startdev, 1 /* format */, first_offs + 1, |
| trkcount, 0, 0) == -EAGAIN) { |
| /* Clock not in sync and XRC is enabled. |
| * Try again later. |
| */ |
| dasd_sfree_request(cqr, startdev); |
| cqr = ERR_PTR(-EAGAIN); |
| goto out; |
| } |
| |
| idaws = (unsigned long *)(cqr->data + pfx_datasize); |
| len_to_track_end = 0; |
| if (start_padding_sectors) { |
| ccw[-1].flags |= CCW_FLAG_CC; |
| ccw->cmd_code = cmd; |
| /* maximum 3390 track size */ |
| ccw->count = 57326; |
| /* 64k map to one track */ |
| len_to_track_end = 65536 - start_padding_sectors * 512; |
| ccw->cda = (__u32)(addr_t)idaws; |
| ccw->flags |= CCW_FLAG_IDA; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw++; |
| for (sectors = 0; sectors < start_padding_sectors; sectors += 8) |
| idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); |
| } |
| rq_for_each_segment(bv, req, iter) { |
| dst = page_address(bv.bv_page) + bv.bv_offset; |
| seg_len = bv.bv_len; |
| if (cmd == DASD_ECKD_CCW_READ_TRACK) |
| memset(dst, 0, seg_len); |
| if (!len_to_track_end) { |
| ccw[-1].flags |= CCW_FLAG_CC; |
| ccw->cmd_code = cmd; |
| /* maximum 3390 track size */ |
| ccw->count = 57326; |
| /* 64k map to one track */ |
| len_to_track_end = 65536; |
| ccw->cda = (__u32)(addr_t)idaws; |
| ccw->flags |= CCW_FLAG_IDA; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw++; |
| } |
| len_to_track_end -= seg_len; |
| idaws = idal_create_words(idaws, dst, seg_len); |
| } |
| for (sectors = 0; sectors < end_padding_sectors; sectors += 8) |
| idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); |
| if (blk_noretry_request(req) || |
| block->base->features & DASD_FEATURE_FAILFAST) |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| cqr->startdev = startdev; |
| cqr->memdev = startdev; |
| cqr->block = block; |
| cqr->expires = startdev->default_expires * HZ; |
| cqr->lpm = dasd_path_get_ppm(startdev); |
| cqr->retries = startdev->default_retries; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| |
| if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) |
| cqr = NULL; |
| out: |
| 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 req_iterator iter; |
| struct bio_vec bv; |
| char *dst, *cda; |
| unsigned int blksize, blk_per_trk, off; |
| sector_t recid; |
| int status; |
| |
| if (!dasd_page_cache) |
| goto out; |
| private = cqr->block->base->private; |
| blksize = cqr->block->bp_block; |
| blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); |
| recid = blk_rq_pos(req) >> cqr->block->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_segment(bv, req, iter) { |
| 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->memdev); |
| return status; |
| } |
| |
| /* |
| * Modify ccw/tcw in cqr so it can be started on a base device. |
| * |
| * Note that this is not enough to restart the cqr! |
| * Either reset cqr->startdev as well (summary unit check handling) |
| * or restart via separate cqr (as in ERP handling). |
| */ |
| void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) |
| { |
| struct ccw1 *ccw; |
| struct PFX_eckd_data *pfxdata; |
| struct tcw *tcw; |
| struct tccb *tccb; |
| struct dcw *dcw; |
| |
| if (cqr->cpmode == 1) { |
| tcw = cqr->cpaddr; |
| tccb = tcw_get_tccb(tcw); |
| dcw = (struct dcw *)&tccb->tca[0]; |
| pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; |
| pfxdata->validity.verify_base = 0; |
| pfxdata->validity.hyper_pav = 0; |
| } else { |
| ccw = cqr->cpaddr; |
| pfxdata = cqr->data; |
| if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { |
| pfxdata->validity.verify_base = 0; |
| pfxdata->validity.hyper_pav = 0; |
| } |
| } |
| } |
| |
| #define DASD_ECKD_CHANQ_MAX_SIZE 4 |
| |
| static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, |
| struct dasd_block *block, |
| struct request *req) |
| { |
| struct dasd_eckd_private *private; |
| struct dasd_device *startdev; |
| unsigned long flags; |
| struct dasd_ccw_req *cqr; |
| |
| startdev = dasd_alias_get_start_dev(base); |
| if (!startdev) |
| startdev = base; |
| private = startdev->private; |
| if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) |
| return ERR_PTR(-EBUSY); |
| |
| spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); |
| private->count++; |
| if ((base->features & DASD_FEATURE_USERAW)) |
| cqr = dasd_raw_build_cp(startdev, block, req); |
| else |
| cqr = dasd_eckd_build_cp(startdev, block, req); |
| if (IS_ERR(cqr)) |
| private->count--; |
| spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); |
| return cqr; |
| } |
| |
| static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, |
| struct request *req) |
| { |
| struct dasd_eckd_private *private; |
| unsigned long flags; |
| |
| spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); |
| private = cqr->memdev->private; |
| private->count--; |
| spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); |
| return dasd_eckd_free_cp(cqr, req); |
| } |
| |
| static int |
| dasd_eckd_fill_info(struct dasd_device * device, |
| struct dasd_information2_t * info) |
| { |
| struct dasd_eckd_private *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(private->rdc_data); |
| memcpy(info->characteristics, &private->rdc_data, |
| sizeof(private->rdc_data)); |
| info->confdata_size = min((unsigned long)private->conf_len, |
| sizeof(info->configuration_data)); |
| memcpy(info->configuration_data, private->conf_data, |
| info->confdata_size); |
| 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; |
| struct ccw1 *ccw; |
| int useglobal; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| |
| useglobal = 0; |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
| if (IS_ERR(cqr)) { |
| mutex_lock(&dasd_reserve_mutex); |
| useglobal = 1; |
| cqr = &dasd_reserve_req->cqr; |
| memset(cqr, 0, sizeof(*cqr)); |
| memset(&dasd_reserve_req->ccw, 0, |
| sizeof(dasd_reserve_req->ccw)); |
| cqr->cpaddr = &dasd_reserve_req->ccw; |
| cqr->data = &dasd_reserve_req->data; |
| cqr->magic = DASD_ECKD_MAGIC; |
| } |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_RELEASE; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->count = 32; |
| ccw->cda = (__u32)(addr_t) cqr->data; |
| cqr->startdev = device; |
| cqr->memdev = device; |
| clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| cqr->retries = 2; /* set retry counter to enable basic ERP */ |
| cqr->expires = 2 * HZ; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| |
| rc = dasd_sleep_on_immediatly(cqr); |
| if (!rc) |
| clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); |
| |
| if (useglobal) |
| mutex_unlock(&dasd_reserve_mutex); |
| else |
| dasd_sfree_request(cqr, cqr->memdev); |
| 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; |
| struct ccw1 *ccw; |
| int useglobal; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| |
| useglobal = 0; |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
| if (IS_ERR(cqr)) { |
| mutex_lock(&dasd_reserve_mutex); |
| useglobal = 1; |
| cqr = &dasd_reserve_req->cqr; |
| memset(cqr, 0, sizeof(*cqr)); |
| memset(&dasd_reserve_req->ccw, 0, |
| sizeof(dasd_reserve_req->ccw)); |
| cqr->cpaddr = &dasd_reserve_req->ccw; |
| cqr->data = &dasd_reserve_req->data; |
| cqr->magic = DASD_ECKD_MAGIC; |
| } |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_RESERVE; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->count = 32; |
| ccw->cda = (__u32)(addr_t) cqr->data; |
| cqr->startdev = device; |
| cqr->memdev = device; |
| clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| cqr->retries = 2; /* set retry counter to enable basic ERP */ |
| cqr->expires = 2 * HZ; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| |
| rc = dasd_sleep_on_immediatly(cqr); |
| if (!rc) |
| set_bit(DASD_FLAG_IS_RESERVED, &device->flags); |
| |
| if (useglobal) |
| mutex_unlock(&dasd_reserve_mutex); |
| else |
| dasd_sfree_request(cqr, cqr->memdev); |
| 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; |
| struct ccw1 *ccw; |
| int useglobal; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| |
| useglobal = 0; |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); |
| if (IS_ERR(cqr)) { |
| mutex_lock(&dasd_reserve_mutex); |
| useglobal = 1; |
| cqr = &dasd_reserve_req->cqr; |
| memset(cqr, 0, sizeof(*cqr)); |
| memset(&dasd_reserve_req->ccw, 0, |
| sizeof(dasd_reserve_req->ccw)); |
| cqr->cpaddr = &dasd_reserve_req->ccw; |
| cqr->data = &dasd_reserve_req->data; |
| cqr->magic = DASD_ECKD_MAGIC; |
| } |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_SLCK; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->count = 32; |
| ccw->cda = (__u32)(addr_t) cqr->data; |
| cqr->startdev = device; |
| cqr->memdev = device; |
| clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| cqr->retries = 2; /* set retry counter to enable basic ERP */ |
| cqr->expires = 2 * HZ; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| |
| rc = dasd_sleep_on_immediatly(cqr); |
| if (!rc) |
| set_bit(DASD_FLAG_IS_RESERVED, &device->flags); |
| |
| if (useglobal) |
| mutex_unlock(&dasd_reserve_mutex); |
| else |
| dasd_sfree_request(cqr, cqr->memdev); |
| return rc; |
| } |
| |
| /* |
| * SNID - Sense Path Group ID |
| * This ioctl may be used in situations where I/O is stalled due to |
| * a reserve, so if the normal dasd_smalloc_request fails, we use the |
| * preallocated dasd_reserve_req. |
| */ |
| static int dasd_eckd_snid(struct dasd_device *device, |
| void __user *argp) |
| { |
| struct dasd_ccw_req *cqr; |
| int rc; |
| struct ccw1 *ccw; |
| int useglobal; |
| struct dasd_snid_ioctl_data usrparm; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| |
| if (copy_from_user(&usrparm, argp, sizeof(usrparm))) |
| return -EFAULT; |
| |
| useglobal = 0; |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, |
| sizeof(struct dasd_snid_data), device); |
| if (IS_ERR(cqr)) { |
| mutex_lock(&dasd_reserve_mutex); |
| useglobal = 1; |
| cqr = &dasd_reserve_req->cqr; |
| memset(cqr, 0, sizeof(*cqr)); |
| memset(&dasd_reserve_req->ccw, 0, |
| sizeof(dasd_reserve_req->ccw)); |
| cqr->cpaddr = &dasd_reserve_req->ccw; |
| cqr->data = &dasd_reserve_req->data; |
| cqr->magic = DASD_ECKD_MAGIC; |
| } |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_SNID; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->count = 12; |
| ccw->cda = (__u32)(addr_t) cqr->data; |
| cqr->startdev = device; |
| cqr->memdev = device; |
| clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); |
| cqr->retries = 5; |
| cqr->expires = 10 * HZ; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| cqr->lpm = usrparm.path_mask; |
| |
| rc = dasd_sleep_on_immediatly(cqr); |
| /* verify that I/O processing didn't modify the path mask */ |
| if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) |
| rc = -EIO; |
| if (!rc) { |
| usrparm.data = *((struct dasd_snid_data *)cqr->data); |
| if (copy_to_user(argp, &usrparm, sizeof(usrparm))) |
| rc = -EFAULT; |
| } |
| |
| if (useglobal) |
| mutex_unlock(&dasd_reserve_mutex); |
| else |
| dasd_sfree_request(cqr, cqr->memdev); |
| 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_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
| (sizeof(struct dasd_psf_prssd_data) + |
| sizeof(struct dasd_rssd_perf_stats_t)), |
| device); |
| if (IS_ERR(cqr)) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Could not allocate initialization request"); |
| return PTR_ERR(cqr); |
| } |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->retries = 0; |
| clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
| 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; /* Performance 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_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| rc = dasd_sleep_on(cqr); |
| if (rc == 0) { |
| 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->memdev); |
| 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 = 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 = 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_info(&device->cdev->dev, |
| "The DASD cache mode was set to %x (%i cylinder prestage)\n", |
| private->attrib.operation, private->attrib.nr_cyl); |
| return 0; |
| } |
| |
| /* |
| * Issue syscall I/O to EMC Symmetrix array. |
| * CCWs are PSF and RSSD |
| */ |
| static int dasd_symm_io(struct dasd_device *device, void __user *argp) |
| { |
| struct dasd_symmio_parms usrparm; |
| char *psf_data, *rssd_result; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| char psf0, psf1; |
| int rc; |
| |
| if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| psf0 = psf1 = 0; |
| |
| /* Copy parms from caller */ |
| rc = -EFAULT; |
| if (copy_from_user(&usrparm, argp, sizeof(usrparm))) |
| goto out; |
| if (is_compat_task()) { |
| /* Make sure pointers are sane even on 31 bit. */ |
| rc = -EINVAL; |
| if ((usrparm.psf_data >> 32) != 0) |
| goto out; |
| if ((usrparm.rssd_result >> 32) != 0) |
| goto out; |
| usrparm.psf_data &= 0x7fffffffULL; |
| usrparm.rssd_result &= 0x7fffffffULL; |
| } |
| /* alloc I/O data area */ |
| psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); |
| rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); |
| if (!psf_data || !rssd_result) { |
| rc = -ENOMEM; |
| goto out_free; |
| } |
| |
| /* get syscall header from user space */ |
| rc = -EFAULT; |
| if (copy_from_user(psf_data, |
| (void __user *)(unsigned long) usrparm.psf_data, |
| usrparm.psf_data_len)) |
| goto out_free; |
| psf0 = psf_data[0]; |
| psf1 = psf_data[1]; |
| |
| /* setup CCWs for PSF + RSSD */ |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); |
| if (IS_ERR(cqr)) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Could not allocate initialization request"); |
| rc = PTR_ERR(cqr); |
| goto out_free; |
| } |
| |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->retries = 3; |
| cqr->expires = 10 * HZ; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| |
| /* Build the ccws */ |
| ccw = cqr->cpaddr; |
| |
| /* PSF ccw */ |
| ccw->cmd_code = DASD_ECKD_CCW_PSF; |
| ccw->count = usrparm.psf_data_len; |
| ccw->flags |= CCW_FLAG_CC; |
| ccw->cda = (__u32)(addr_t) psf_data; |
| |
| ccw++; |
| |
| /* RSSD ccw */ |
| ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
| ccw->count = usrparm.rssd_result_len; |
| ccw->flags = CCW_FLAG_SLI ; |
| ccw->cda = (__u32)(addr_t) rssd_result; |
| |
| rc = dasd_sleep_on(cqr); |
| if (rc) |
| goto out_sfree; |
| |
| rc = -EFAULT; |
| if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, |
| rssd_result, usrparm.rssd_result_len)) |
| goto out_sfree; |
| rc = 0; |
| |
| out_sfree: |
| dasd_sfree_request(cqr, cqr->memdev); |
| out_free: |
| kfree(rssd_result); |
| kfree(psf_data); |
| out: |
| DBF_DEV_EVENT(DBF_WARNING, device, |
| "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", |
| (int) psf0, (int) psf1, rc); |
| return rc; |
| } |
| |
| static int |
| dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) |
| { |
| struct dasd_device *device = block->base; |
| |
| 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); |
| case BIODASDSNID: |
| return dasd_eckd_snid(device, argp); |
| case BIODASDSYMMIO: |
| return dasd_symm_io(device, argp); |
| default: |
| return -ENOTTY; |
| } |
| } |
| |
| /* |
| * Dump the range of CCWs into 'page' buffer |
| * and return number of printed chars. |
| */ |
| static 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, 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; |
| } |
| |
| static void |
| dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
| char *reason) |
| { |
| u64 *sense; |
| u64 *stat; |
| |
| sense = (u64 *) dasd_get_sense(irb); |
| stat = (u64 *) &irb->scsw; |
| if (sense) { |
| DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " |
| "%016llx %016llx %016llx %016llx", |
| reason, *stat, *((u32 *) (stat + 1)), |
| sense[0], sense[1], sense[2], sense[3]); |
| } else { |
| DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", |
| reason, *stat, *((u32 *) (stat + 1)), |
| "NO VALID SENSE"); |
| } |
| } |
| |
| /* |
| * Print sense data and related channel program. |
| * Parts are printed because printk buffer is only 1024 bytes. |
| */ |
| static void dasd_eckd_dump_sense_ccw(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) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "No memory to dump sense data\n"); |
| return; |
| } |
| /* dump the sense data */ |
| len = sprintf(page, PRINTK_HEADER |
| " I/O status report for device %s:\n", |
| dev_name(&device->cdev->dev)); |
| len += sprintf(page + len, PRINTK_HEADER |
| " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
| "CS:%02X RC:%d\n", |
| req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), |
| scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), |
| scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), |
| req ? req->intrc : 0); |
| len += sprintf(page + len, PRINTK_HEADER |
| " device %s: Failing CCW: %p\n", |
| dev_name(&device->cdev->dev), |
| (void *) (addr_t) irb->scsw.cmd.cpa); |
| if (irb->esw.esw0.erw.cons) { |
| for (sl = 0; sl < 4; sl++) { |
| len += sprintf(page + len, 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, 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, PRINTK_HEADER |
| " 32 Byte: Format: %x " |
| "Exception class %x\n", |
| irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); |
| } |
| } else { |
| sprintf(page + len, PRINTK_HEADER |
| " SORRY - NO VALID SENSE AVAILABLE\n"); |
| } |
| printk(KERN_ERR "%s", page); |
| |
| if (req) { |
| /* req == NULL for unsolicited interrupts */ |
| /* 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, PRINTK_HEADER |
| " Related CP in req: %p\n", req); |
| dasd_eckd_dump_ccw_range(first, to, page + len); |
| printk(KERN_ERR "%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.cmd.cpa; /* failing CCW */ |
| if (from < fail - 2) { |
| from = fail - 2; /* there is a gap - print header */ |
| len += sprintf(page, 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, PRINTK_HEADER "......\n"); |
| } |
| len += dasd_eckd_dump_ccw_range(from, last, page + len); |
| if (len > 0) |
| printk(KERN_ERR "%s", page); |
| } |
| free_page((unsigned long) page); |
| } |
| |
| |
| /* |
| * Print sense data from a tcw. |
| */ |
| static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, |
| struct dasd_ccw_req *req, struct irb *irb) |
| { |
| char *page; |
| int len, sl, sct, residual; |
| struct tsb *tsb; |
| u8 *sense, *rcq; |
| |
| page = (char *) get_zeroed_page(GFP_ATOMIC); |
| if (page == NULL) { |
| DBF_DEV_EVENT(DBF_WARNING, device, " %s", |
| "No memory to dump sense data"); |
| return; |
| } |
| /* dump the sense data */ |
| len = sprintf(page, PRINTK_HEADER |
| " I/O status report for device %s:\n", |
| dev_name(&device->cdev->dev)); |
| len += sprintf(page + len, PRINTK_HEADER |
| " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " |
| "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", |
| req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), |
| scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), |
| scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), |
| irb->scsw.tm.fcxs, |
| (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, |
| req ? req->intrc : 0); |
| len += sprintf(page + len, PRINTK_HEADER |
| " device %s: Failing TCW: %p\n", |
| dev_name(&device->cdev->dev), |
| (void *) (addr_t) irb->scsw.tm.tcw); |
| |
| tsb = NULL; |
| sense = NULL; |
| if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) |
| tsb = tcw_get_tsb( |
| (struct tcw *)(unsigned long)irb->scsw.tm.tcw); |
| |
| if (tsb) { |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->length %d\n", tsb->length); |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->flags %x\n", tsb->flags); |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->dcw_offset %d\n", tsb->dcw_offset); |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->count %d\n", tsb->count); |
| residual = tsb->count - 28; |
| len += sprintf(page + len, PRINTK_HEADER |
| " residual %d\n", residual); |
| |
| switch (tsb->flags & 0x07) { |
| case 1: /* tsa_iostat */ |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->tsa.iostat.dev_time %d\n", |
| tsb->tsa.iostat.dev_time); |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->tsa.iostat.def_time %d\n", |
| tsb->tsa.iostat.def_time); |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->tsa.iostat.queue_time %d\n", |
| tsb->tsa.iostat.queue_time); |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->tsa.iostat.dev_busy_time %d\n", |
| tsb->tsa.iostat.dev_busy_time); |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->tsa.iostat.dev_act_time %d\n", |
| tsb->tsa.iostat.dev_act_time); |
| sense = tsb->tsa.iostat.sense; |
| break; |
| case 2: /* ts_ddpc */ |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); |
| for (sl = 0; sl < 2; sl++) { |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->tsa.ddpc.rcq %2d-%2d: ", |
| (8 * sl), ((8 * sl) + 7)); |
| rcq = tsb->tsa.ddpc.rcq; |
| for (sct = 0; sct < 8; sct++) { |
| len += sprintf(page + len, " %02x", |
| rcq[8 * sl + sct]); |
| } |
| len += sprintf(page + len, "\n"); |
| } |
| sense = tsb->tsa.ddpc.sense; |
| break; |
| case 3: /* tsa_intrg */ |
| len += sprintf(page + len, PRINTK_HEADER |
| " tsb->tsa.intrg.: not supported yet\n"); |
| break; |
| } |
| |
| if (sense) { |
| for (sl = 0; sl < 4; sl++) { |
| len += sprintf(page + len, 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 */ |
| sprintf(page + len, 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 */ |
| sprintf(page + len, PRINTK_HEADER |
| " 32 Byte: Format: %x " |
| "Exception class %x\n", |
| sense[6] & 0x0f, sense[22] >> 4); |
| } |
| } else { |
| sprintf(page + len, PRINTK_HEADER |
| " SORRY - NO VALID SENSE AVAILABLE\n"); |
| } |
| } else { |
| sprintf(page + len, PRINTK_HEADER |
| " SORRY - NO TSB DATA AVAILABLE\n"); |
| } |
| printk(KERN_ERR "%s", page); |
| free_page((unsigned long) page); |
| } |
| |
| static void dasd_eckd_dump_sense(struct dasd_device *device, |
| struct dasd_ccw_req *req, struct irb *irb) |
| { |
| u8 *sense = dasd_get_sense(irb); |
| |
| if (scsw_is_tm(&irb->scsw)) { |
| /* |
| * In some cases the 'File Protected' or 'Incorrect Length' |
| * error might be expected and log messages shouldn't be written |
| * then. Check if the according suppress bit is set. |
| */ |
| if (sense && (sense[1] & SNS1_FILE_PROTECTED) && |
| test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) |
| return; |
| if (scsw_cstat(&irb->scsw) == 0x40 && |
| test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) |
| return; |
| |
| dasd_eckd_dump_sense_tcw(device, req, irb); |
| } else { |
| /* |
| * In some cases the 'Command Reject' or 'No Record Found' |
| * error might be expected and log messages shouldn't be |
| * written then. Check if the according suppress bit is set. |
| */ |
| if (sense && sense[0] & SNS0_CMD_REJECT && |
| test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) |
| return; |
| |
| if (sense && sense[1] & SNS1_NO_REC_FOUND && |
| test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) |
| return; |
| |
| dasd_eckd_dump_sense_ccw(device, req, irb); |
| } |
| } |
| |
| static int dasd_eckd_pm_freeze(struct dasd_device *device) |
| { |
| /* |
| * the device should be disconnected from our LCU structure |
| * on restore we will reconnect it and reread LCU specific |
| * information like PAV support that might have changed |
| */ |
| dasd_alias_remove_device(device); |
| dasd_alias_disconnect_device_from_lcu(device); |
| |
| return 0; |
| } |
| |
| static int dasd_eckd_restore_device(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| struct dasd_eckd_characteristics temp_rdc_data; |
| int rc; |
| struct dasd_uid temp_uid; |
| unsigned long flags; |
| unsigned long cqr_flags = 0; |
| |
| /* Read Configuration Data */ |
| rc = dasd_eckd_read_conf(device); |
| if (rc) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
| "Read configuration data failed, rc=%d", rc); |
| goto out_err; |
| } |
| |
| dasd_eckd_get_uid(device, &temp_uid); |
| /* Generate device unique id */ |
| rc = dasd_eckd_generate_uid(device); |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) |
| dev_err(&device->cdev->dev, "The UID of the DASD has " |
| "changed\n"); |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| if (rc) |
| goto out_err; |
| |
| /* register lcu with alias handling, enable PAV if this is a new lcu */ |
| rc = dasd_alias_make_device_known_to_lcu(device); |
| if (rc) |
| goto out_err; |
| |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); |
| dasd_eckd_validate_server(device, cqr_flags); |
| |
| /* RE-Read Configuration Data */ |
| rc = dasd_eckd_read_conf(device); |
| if (rc) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
| "Read configuration data failed, rc=%d", rc); |
| goto out_err2; |
| } |
| |
| /* Read Feature Codes */ |
| dasd_eckd_read_features(device); |
| |
| /* Read Device Characteristics */ |
| rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, |
| &temp_rdc_data, 64); |
| if (rc) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
| "Read device characteristic failed, rc=%d", rc); |
| goto out_err2; |
| } |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| |
| /* add device to alias management */ |
| dasd_alias_add_device(device); |
| |
| return 0; |
| |
| out_err2: |
| dasd_alias_disconnect_device_from_lcu(device); |
| out_err: |
| return -1; |
| } |
| |
| static int dasd_eckd_reload_device(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| int rc, old_base; |
| char print_uid[60]; |
| struct dasd_uid uid; |
| unsigned long flags; |
| |
| /* |
| * remove device from alias handling to prevent new requests |
| * from being scheduled on the wrong alias device |
| */ |
| dasd_alias_remove_device(device); |
| |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| old_base = private->uid.base_unit_addr; |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| |
| /* Read Configuration Data */ |
| rc = dasd_eckd_read_conf(device); |
| if (rc) |
| goto out_err; |
| |
| rc = dasd_eckd_generate_uid(device); |
| if (rc) |
| goto out_err; |
| /* |
| * update unit address configuration and |
| * add device to alias management |
| */ |
| dasd_alias_update_add_device(device); |
| |
| dasd_eckd_get_uid(device, &uid); |
| |
| if (old_base != uid.base_unit_addr) { |
| if (strlen(uid.vduit) > 0) |
| snprintf(print_uid, sizeof(print_uid), |
| "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, |
| uid.ssid, uid.base_unit_addr, uid.vduit); |
| else |
| snprintf(print_uid, sizeof(print_uid), |
| "%s.%s.%04x.%02x", uid.vendor, uid.serial, |
| uid.ssid, uid.base_unit_addr); |
| |
| dev_info(&device->cdev->dev, |
| "An Alias device was reassigned to a new base device " |
| "with UID: %s\n", print_uid); |
| } |
| return 0; |
| |
| out_err: |
| return -1; |
| } |
| |
| static int dasd_eckd_read_message_buffer(struct dasd_device *device, |
| struct dasd_rssd_messages *messages, |
| __u8 lpum) |
| { |
| struct dasd_rssd_messages *message_buf; |
| struct dasd_psf_prssd_data *prssdp; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| int rc; |
| |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
| (sizeof(struct dasd_psf_prssd_data) + |
| sizeof(struct dasd_rssd_messages)), |
| device); |
| if (IS_ERR(cqr)) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "Could not allocate read message buffer request"); |
| return PTR_ERR(cqr); |
| } |
| |
| cqr->lpm = lpum; |
| retry: |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->block = NULL; |
| cqr->expires = 10 * HZ; |
| set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
| /* dasd_sleep_on_immediatly does not do complex error |
| * recovery so clear erp flag and set retry counter to |
| * do basic erp */ |
| clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); |
| cqr->retries = 256; |
| |
| /* 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 = 0x03; /* Message Buffer */ |
| /* all other bytes of prssdp must be zero */ |
| |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_PSF; |
| ccw->count = sizeof(struct dasd_psf_prssd_data); |
| ccw->flags |= CCW_FLAG_CC; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->cda = (__u32)(addr_t) prssdp; |
| |
| /* Read Subsystem Data - message buffer */ |
| message_buf = (struct dasd_rssd_messages *) (prssdp + 1); |
| memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); |
| |
| ccw++; |
| ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
| ccw->count = sizeof(struct dasd_rssd_messages); |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->cda = (__u32)(addr_t) message_buf; |
| |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| rc = dasd_sleep_on_immediatly(cqr); |
| if (rc == 0) { |
| prssdp = (struct dasd_psf_prssd_data *) cqr->data; |
| message_buf = (struct dasd_rssd_messages *) |
| (prssdp + 1); |
| memcpy(messages, message_buf, |
| sizeof(struct dasd_rssd_messages)); |
| } else if (cqr->lpm) { |
| /* |
| * on z/VM we might not be able to do I/O on the requested path |
| * but instead we get the required information on any path |
| * so retry with open path mask |
| */ |
| cqr->lpm = 0; |
| goto retry; |
| } else |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
| "Reading messages failed with rc=%d\n" |
| , rc); |
| dasd_sfree_request(cqr, cqr->memdev); |
| return rc; |
| } |
| |
| static int dasd_eckd_query_host_access(struct dasd_device *device, |
| struct dasd_psf_query_host_access *data) |
| { |
| struct dasd_eckd_private *private = device->private; |
| struct dasd_psf_query_host_access *host_access; |
| struct dasd_psf_prssd_data *prssdp; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| int rc; |
| |
| /* not available for HYPER PAV alias devices */ |
| if (!device->block && private->lcu->pav == HYPER_PAV) |
| return -EOPNOTSUPP; |
| |
| /* may not be supported by the storage server */ |
| if (!(private->features.feature[14] & 0x80)) |
| return -EOPNOTSUPP; |
| |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, |
| sizeof(struct dasd_psf_prssd_data) + 1, |
| device); |
| if (IS_ERR(cqr)) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "Could not allocate read message buffer request"); |
| return PTR_ERR(cqr); |
| } |
| host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); |
| if (!host_access) { |
| dasd_sfree_request(cqr, device); |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "Could not allocate host_access buffer"); |
| return -ENOMEM; |
| } |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->block = NULL; |
| cqr->retries = 256; |
| 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 = PSF_SUBORDER_QHA; /* query host access */ |
| /* LSS and Volume that will be queried */ |
| prssdp->lss = private->ned->ID; |
| prssdp->volume = private->ned->unit_addr; |
| /* all other bytes of prssdp must be zero */ |
| |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_PSF; |
| ccw->count = sizeof(struct dasd_psf_prssd_data); |
| ccw->flags |= CCW_FLAG_CC; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->cda = (__u32)(addr_t) prssdp; |
| |
| /* Read Subsystem Data - query host access */ |
| ccw++; |
| ccw->cmd_code = DASD_ECKD_CCW_RSSD; |
| ccw->count = sizeof(struct dasd_psf_query_host_access); |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->cda = (__u32)(addr_t) host_access; |
| |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| /* the command might not be supported, suppress error message */ |
| __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); |
| rc = dasd_sleep_on_interruptible(cqr); |
| if (rc == 0) { |
| *data = *host_access; |
| } else { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, |
| "Reading host access data failed with rc=%d\n", |
| rc); |
| rc = -EOPNOTSUPP; |
| } |
| |
| dasd_sfree_request(cqr, cqr->memdev); |
| kfree(host_access); |
| return rc; |
| } |
| /* |
| * return number of grouped devices |
| */ |
| static int dasd_eckd_host_access_count(struct dasd_device *device) |
| { |
| struct dasd_psf_query_host_access *access; |
| struct dasd_ckd_path_group_entry *entry; |
| struct dasd_ckd_host_information *info; |
| int count = 0; |
| int rc, i; |
| |
| access = kzalloc(sizeof(*access), GFP_NOIO); |
| if (!access) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "Could not allocate access buffer"); |
| return -ENOMEM; |
| } |
| rc = dasd_eckd_query_host_access(device, access); |
| if (rc) { |
| kfree(access); |
| return rc; |
| } |
| |
| info = (struct dasd_ckd_host_information *) |
| access->host_access_information; |
| for (i = 0; i < info->entry_count; i++) { |
| entry = (struct dasd_ckd_path_group_entry *) |
| (info->entry + i * info->entry_size); |
| if (entry->status_flags & DASD_ECKD_PG_GROUPED) |
| count++; |
| } |
| |
| kfree(access); |
| return count; |
| } |
| |
| /* |
| * write host access information to a sequential file |
| */ |
| static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) |
| { |
| struct dasd_psf_query_host_access *access; |
| struct dasd_ckd_path_group_entry *entry; |
| struct dasd_ckd_host_information *info; |
| char sysplex[9] = ""; |
| int rc, i, j; |
| |
| access = kzalloc(sizeof(*access), GFP_NOIO); |
| if (!access) { |
| DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", |
| "Could not allocate access buffer"); |
| return -ENOMEM; |
| } |
| rc = dasd_eckd_query_host_access(device, access); |
| if (rc) { |
| kfree(access); |
| return rc; |
| } |
| |
| info = (struct dasd_ckd_host_information *) |
| access->host_access_information; |
| for (i = 0; i < info->entry_count; i++) { |
| entry = (struct dasd_ckd_path_group_entry *) |
| (info->entry + i * info->entry_size); |
| /* PGID */ |
| seq_puts(m, "pgid "); |
| for (j = 0; j < 11; j++) |
| seq_printf(m, "%02x", entry->pgid[j]); |
| seq_putc(m, '\n'); |
| /* FLAGS */ |
| seq_printf(m, "status_flags %02x\n", entry->status_flags); |
| /* SYSPLEX NAME */ |
| memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); |
| EBCASC(sysplex, sizeof(sysplex)); |
| seq_printf(m, "sysplex_name %8s\n", sysplex); |
| /* SUPPORTED CYLINDER */ |
| seq_printf(m, "supported_cylinder %d\n", entry->cylinder); |
| /* TIMESTAMP */ |
| seq_printf(m, "timestamp %lu\n", (unsigned long) |
| entry->timestamp); |
| } |
| kfree(access); |
| |
| return 0; |
| } |
| |
| /* |
| * Perform Subsystem Function - CUIR response |
| */ |
| static int |
| dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, |
| __u32 message_id, __u8 lpum) |
| { |
| struct dasd_psf_cuir_response *psf_cuir; |
| int pos = pathmask_to_pos(lpum); |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| int rc; |
| |
| cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , |
| sizeof(struct dasd_psf_cuir_response), |
| device); |
| |
| if (IS_ERR(cqr)) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Could not allocate PSF-CUIR request"); |
| return PTR_ERR(cqr); |
| } |
| |
| psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; |
| psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; |
| psf_cuir->cc = response; |
| psf_cuir->chpid = device->path[pos].chpid; |
| psf_cuir->message_id = message_id; |
| psf_cuir->cssid = device->path[pos].cssid; |
| psf_cuir->ssid = device->path[pos].ssid; |
| ccw = cqr->cpaddr; |
| ccw->cmd_code = DASD_ECKD_CCW_PSF; |
| ccw->cda = (__u32)(addr_t)psf_cuir; |
| ccw->flags = CCW_FLAG_SLI; |
| ccw->count = sizeof(struct dasd_psf_cuir_response); |
| |
| cqr->startdev = device; |
| cqr->memdev = device; |
| cqr->block = NULL; |
| cqr->retries = 256; |
| cqr->expires = 10*HZ; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); |
| |
| rc = dasd_sleep_on(cqr); |
| |
| dasd_sfree_request(cqr, cqr->memdev); |
| return rc; |
| } |
| |
| /* |
| * return configuration data that is referenced by record selector |
| * if a record selector is specified or per default return the |
| * conf_data pointer for the path specified by lpum |
| */ |
| static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, |
| __u8 lpum, |
| struct dasd_cuir_message *cuir) |
| { |
| struct dasd_conf_data *conf_data; |
| int path, pos; |
| |
| if (cuir->record_selector == 0) |
| goto out; |
| for (path = 0x80, pos = 0; path; path >>= 1, pos++) { |
| conf_data = device->path[pos].conf_data; |
| if (conf_data->gneq.record_selector == |
| cuir->record_selector) |
| return conf_data; |
| } |
| out: |
| return device->path[pathmask_to_pos(lpum)].conf_data; |
| } |
| |
| /* |
| * This function determines the scope of a reconfiguration request by |
| * analysing the path and device selection data provided in the CUIR request. |
| * Returns a path mask containing CUIR affected paths for the give device. |
| * |
| * If the CUIR request does not contain the required information return the |
| * path mask of the path the attention message for the CUIR request was reveived |
| * on. |
| */ |
| static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, |
| struct dasd_cuir_message *cuir) |
| { |
| struct dasd_conf_data *ref_conf_data; |
| unsigned long bitmask = 0, mask = 0; |
| struct dasd_conf_data *conf_data; |
| unsigned int pos, path; |
| char *ref_gneq, *gneq; |
| char *ref_ned, *ned; |
| int tbcpm = 0; |
| |
| /* if CUIR request does not specify the scope use the path |
| the attention message was presented on */ |
| if (!cuir->ned_map || |
| !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) |
| return lpum; |
| |
| /* get reference conf data */ |
| ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); |
| /* reference ned is determined by ned_map field */ |
| pos = 8 - ffs(cuir->ned_map); |
| ref_ned = (char *)&ref_conf_data->neds[pos]; |
| ref_gneq = (char *)&ref_conf_data->gneq; |
| /* transfer 24 bit neq_map to mask */ |
| mask = cuir->neq_map[2]; |
| mask |= cuir->neq_map[1] << 8; |
| mask |= cuir->neq_map[0] << 16; |
| |
| for (path = 0; path < 8; path++) { |
| /* initialise data per path */ |
| bitmask = mask; |
| conf_data = device->path[path].conf_data; |
| pos = 8 - ffs(cuir->ned_map); |
| ned = (char *) &conf_data->neds[pos]; |
| /* compare reference ned and per path ned */ |
| if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) |
| continue; |
| gneq = (char *)&conf_data->gneq; |
| /* compare reference gneq and per_path gneq under |
| 24 bit mask where mask bit 0 equals byte 7 of |
| the gneq and mask bit 24 equals byte 31 */ |
| while (bitmask) { |
| pos = ffs(bitmask) - 1; |
| if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) |
| != 0) |
| break; |
| clear_bit(pos, &bitmask); |
| } |
| if (bitmask) |
| continue; |
| /* device and path match the reference values |
| add path to CUIR scope */ |
| tbcpm |= 0x80 >> path; |
| } |
| return tbcpm; |
| } |
| |
| static void dasd_eckd_cuir_notify_user(struct dasd_device *device, |
| unsigned long paths, int action) |
| { |
| int pos; |
| |
| while (paths) { |
| /* get position of bit in mask */ |
| pos = 8 - ffs(paths); |
| /* get channel path descriptor from this position */ |
| if (action == CUIR_QUIESCE) |
| pr_warn("Service on the storage server caused path %x.%02x to go offline", |
| device->path[pos].cssid, |
| device->path[pos].chpid); |
| else if (action == CUIR_RESUME) |
| pr_info("Path %x.%02x is back online after service on the storage server", |
| device->path[pos].cssid, |
| device->path[pos].chpid); |
| clear_bit(7 - pos, &paths); |
| } |
| } |
| |
| static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, |
| struct dasd_cuir_message *cuir) |
| { |
| unsigned long tbcpm; |
| |
| tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); |
| /* nothing to do if path is not in use */ |
| if (!(dasd_path_get_opm(device) & tbcpm)) |
| return 0; |
| if (!(dasd_path_get_opm(device) & ~tbcpm)) { |
| /* no path would be left if the CUIR action is taken |
| return error */ |
| return -EINVAL; |
| } |
| /* remove device from operational path mask */ |
| dasd_path_remove_opm(device, tbcpm); |
| dasd_path_add_cuirpm(device, tbcpm); |
| return tbcpm; |
| } |
| |
| /* |
| * walk through all devices and build a path mask to quiesce them |
| * return an error if the last path to a device would be removed |
| * |
| * if only part of the devices are quiesced and an error |
| * occurs no onlining necessary, the storage server will |
| * notify the already set offline devices again |
| */ |
| static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, |
| struct dasd_cuir_message *cuir) |
| { |
| struct dasd_eckd_private *private = device->private; |
| struct alias_pav_group *pavgroup, *tempgroup; |
| struct dasd_device *dev, *n; |
| unsigned long paths = 0; |
| unsigned long flags; |
| int tbcpm; |
| |
| /* active devices */ |
| list_for_each_entry_safe(dev, n, &private->lcu->active_devices, |
| alias_list) { |
| spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
| tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); |
| spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); |
| if (tbcpm < 0) |
| goto out_err; |
| paths |= tbcpm; |
| } |
| /* inactive devices */ |
| list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, |
| alias_list) { |
| spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
| tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); |
| spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); |
| if (tbcpm < 0) |
| goto out_err; |
| paths |= tbcpm; |
| } |
| /* devices in PAV groups */ |
| list_for_each_entry_safe(pavgroup, tempgroup, |
| &private->lcu->grouplist, group) { |
| list_for_each_entry_safe(dev, n, &pavgroup->baselist, |
| alias_list) { |
| spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
| tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); |
| spin_unlock_irqrestore( |
| get_ccwdev_lock(dev->cdev), flags); |
| if (tbcpm < 0) |
| goto out_err; |
| paths |= tbcpm; |
| } |
| list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, |
| alias_list) { |
| spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); |
| tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); |
| spin_unlock_irqrestore( |
| get_ccwdev_lock(dev->cdev), flags); |
| if (tbcpm < 0) |
| goto out_err; |
| paths |= tbcpm; |
| } |
| } |
| /* notify user about all paths affected by CUIR action */ |
| dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); |
| return 0; |
| out_err: |
| return tbcpm; |
| } |
| |
| static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, |
| struct dasd_cuir_message *cuir) |
| { |
| struct dasd_eckd_private *private = device->private; |
| struct alias_pav_group *pavgroup, *tempgroup; |
| struct dasd_device *dev, *n; |
| unsigned long paths = 0; |
| int tbcpm; |
| |
| /* |
| * the path may have been added through a generic path event before |
| * only trigger path verification if the path is not already in use |
| */ |
| list_for_each_entry_safe(dev, n, |
| &private->lcu->active_devices, |
| alias_list) { |
| tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
| paths |= tbcpm; |
| if (!(dasd_path_get_opm(dev) & tbcpm)) { |
| dasd_path_add_tbvpm(dev, tbcpm); |
| dasd_schedule_device_bh(dev); |
| } |
| } |
| list_for_each_entry_safe(dev, n, |
| &private->lcu->inactive_devices, |
| alias_list) { |
| tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
| paths |= tbcpm; |
| if (!(dasd_path_get_opm(dev) & tbcpm)) { |
| dasd_path_add_tbvpm(dev, tbcpm); |
| dasd_schedule_device_bh(dev); |
| } |
| } |
| /* devices in PAV groups */ |
| list_for_each_entry_safe(pavgroup, tempgroup, |
| &private->lcu->grouplist, |
| group) { |
| list_for_each_entry_safe(dev, n, |
| &pavgroup->baselist, |
| alias_list) { |
| tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
| paths |= tbcpm; |
| if (!(dasd_path_get_opm(dev) & tbcpm)) { |
| dasd_path_add_tbvpm(dev, tbcpm); |
| dasd_schedule_device_bh(dev); |
| } |
| } |
| list_for_each_entry_safe(dev, n, |
| &pavgroup->aliaslist, |
| alias_list) { |
| tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); |
| paths |= tbcpm; |
| if (!(dasd_path_get_opm(dev) & tbcpm)) { |
| dasd_path_add_tbvpm(dev, tbcpm); |
| dasd_schedule_device_bh(dev); |
| } |
| } |
| } |
| /* notify user about all paths affected by CUIR action */ |
| dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); |
| return 0; |
| } |
| |
| static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, |
| __u8 lpum) |
| { |
| struct dasd_cuir_message *cuir = messages; |
| int response; |
| |
| DBF_DEV_EVENT(DBF_WARNING, device, |
| "CUIR request: %016llx %016llx %016llx %08x", |
| ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], |
| ((u32 *)cuir)[3]); |
| |
| if (cuir->code == CUIR_QUIESCE) { |
| /* quiesce */ |
| if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) |
| response = PSF_CUIR_LAST_PATH; |
| else |
| response = PSF_CUIR_COMPLETED; |
| } else if (cuir->code == CUIR_RESUME) { |
| /* resume */ |
| dasd_eckd_cuir_resume(device, lpum, cuir); |
| response = PSF_CUIR_COMPLETED; |
| } else |
| response = PSF_CUIR_NOT_SUPPORTED; |
| |
| dasd_eckd_psf_cuir_response(device, response, |
| cuir->message_id, lpum); |
| DBF_DEV_EVENT(DBF_WARNING, device, |
| "CUIR response: %d on message ID %08x", response, |
| cuir->message_id); |
| /* to make sure there is no attention left schedule work again */ |
| device->discipline->check_attention(device, lpum); |
| } |
| |
| static void dasd_eckd_check_attention_work(struct work_struct *work) |
| { |
| struct check_attention_work_data *data; |
| struct dasd_rssd_messages *messages; |
| struct dasd_device *device; |
| int rc; |
| |
| data = container_of(work, struct check_attention_work_data, worker); |
| device = data->device; |
| messages = kzalloc(sizeof(*messages), GFP_KERNEL); |
| if (!messages) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Could not allocate attention message buffer"); |
| goto out; |
| } |
| rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); |
| if (rc) |
| goto out; |
| if (messages->length == ATTENTION_LENGTH_CUIR && |
| messages->format == ATTENTION_FORMAT_CUIR) |
| dasd_eckd_handle_cuir(device, messages, data->lpum); |
| out: |
| dasd_put_device(device); |
| kfree(messages); |
| kfree(data); |
| } |
| |
| static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) |
| { |
| struct check_attention_work_data *data; |
| |
| data = kzalloc(sizeof(*data), GFP_ATOMIC); |
| if (!data) |
| return -ENOMEM; |
| INIT_WORK(&data->worker, dasd_eckd_check_attention_work); |
| dasd_get_device(device); |
| data->device = device; |
| data->lpum = lpum; |
| schedule_work(&data->worker); |
| return 0; |
| } |
| |
| static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) |
| { |
| if (~lpum & dasd_path_get_opm(device)) { |
| dasd_path_add_nohpfpm(device, lpum); |
| dasd_path_remove_opm(device, lpum); |
| dev_err(&device->cdev->dev, |
| "Channel path %02X lost HPF functionality and is disabled\n", |
| lpum); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static void dasd_eckd_disable_hpf_device(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| |
| dev_err(&device->cdev->dev, |
| "High Performance FICON disabled\n"); |
| private->fcx_max_data = 0; |
| } |
| |
| static int dasd_eckd_hpf_enabled(struct dasd_device *device) |
| { |
| struct dasd_eckd_private *private = device->private; |
| |
| return private->fcx_max_data ? 1 : 0; |
| } |
| |
| static void dasd_eckd_handle_hpf_error(struct dasd_device *device, |
| struct irb *irb) |
| { |
| struct dasd_eckd_private *private = device->private; |
| |
| if (!private->fcx_max_data) { |
| /* sanity check for no HPF, the error makes no sense */ |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Trying to disable HPF for a non HPF device"); |
| return; |
| } |
| if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { |
| dasd_eckd_disable_hpf_device(device); |
| } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { |
| if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) |
| return; |
| dasd_eckd_disable_hpf_device(device); |
| dasd_path_set_tbvpm(device, |
| dasd_path_get_hpfpm(device)); |
| } |
| /* |
| * prevent that any new I/O ist started on the device and schedule a |
| * requeue of existing requests |
| */ |
| dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); |
| dasd_schedule_requeue(device); |
| } |
| |
| static struct ccw_driver dasd_eckd_driver = { |
| .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, |
| .path_event = dasd_generic_path_event, |
| .shutdown = dasd_generic_shutdown, |
| .freeze = dasd_generic_pm_freeze, |
| .thaw = dasd_generic_restore_device, |
| .restore = dasd_generic_restore_device, |
| .uc_handler = dasd_generic_uc_handler, |
| .int_class = IRQIO_DAS, |
| }; |
| |
| /* |
| * 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 = 190, |
| .check_device = dasd_eckd_check_characteristics, |
| .uncheck_device = dasd_eckd_uncheck_device, |
| .do_analysis = dasd_eckd_do_analysis, |
| .verify_path = dasd_eckd_verify_path, |
| .basic_to_ready = dasd_eckd_basic_to_ready, |
| .online_to_ready = dasd_eckd_online_to_ready, |
| .basic_to_known = dasd_eckd_basic_to_known, |
| .fill_geometry = dasd_eckd_fill_geometry, |
| .start_IO = dasd_start_IO, |
| .term_IO = dasd_term_IO, |
| .handle_terminated_request = dasd_eckd_handle_terminated_request, |
| .format_device = dasd_eckd_format_device, |
| .check_device_format = dasd_eckd_check_device_format, |
| .erp_action = dasd_eckd_erp_action, |
| .erp_postaction = dasd_eckd_erp_postaction, |
| .check_for_device_change = dasd_eckd_check_for_device_change, |
| .build_cp = dasd_eckd_build_alias_cp, |
| .free_cp = dasd_eckd_free_alias_cp, |
| .dump_sense = dasd_eckd_dump_sense, |
| .dump_sense_dbf = dasd_eckd_dump_sense_dbf, |
| .fill_info = dasd_eckd_fill_info, |
| .ioctl = dasd_eckd_ioctl, |
| .freeze = dasd_eckd_pm_freeze, |
| .restore = dasd_eckd_restore_device, |
| .reload = dasd_eckd_reload_device, |
| .get_uid = dasd_eckd_get_uid, |
| .kick_validate = dasd_eckd_kick_validate_server, |
| .check_attention = dasd_eckd_check_attention, |
| .host_access_count = dasd_eckd_host_access_count, |
| .hosts_print = dasd_hosts_print, |
| .handle_hpf_error = dasd_eckd_handle_hpf_error, |
| .disable_hpf = dasd_eckd_disable_hpf_device, |
| .hpf_enabled = dasd_eckd_hpf_enabled, |
| .reset_path = dasd_eckd_reset_path, |
| }; |
| |
| static int __init |
| dasd_eckd_init(void) |
| { |
| int ret; |
| |
| ASCEBC(dasd_eckd_discipline.ebcname, 4); |
| dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), |
| GFP_KERNEL | GFP_DMA); |
| if (!dasd_reserve_req) |
| return -ENOMEM; |
| path_verification_worker = kmalloc(sizeof(*path_verification_worker), |
| GFP_KERNEL | GFP_DMA); |
| if (!path_verification_worker) { |
| kfree(dasd_reserve_req); |
| return -ENOMEM; |
| } |
| rawpadpage = (void *)__get_free_page(GFP_KERNEL); |
| if (!rawpadpage) { |
| kfree(path_verification_worker); |
| kfree(dasd_reserve_req); |
| return -ENOMEM; |
| } |
| ret = ccw_driver_register(&dasd_eckd_driver); |
| if (!ret) |
| wait_for_device_probe(); |
| else { |
| kfree(path_verification_worker); |
| kfree(dasd_reserve_req); |
| free_page((unsigned long)rawpadpage); |
| } |
| return ret; |
| } |
| |
| static void __exit |
| dasd_eckd_cleanup(void) |
| { |
| ccw_driver_unregister(&dasd_eckd_driver); |
| kfree(path_verification_worker); |
| kfree(dasd_reserve_req); |
| free_page((unsigned long)rawpadpage); |
| } |
| |
| module_init(dasd_eckd_init); |
| module_exit(dasd_eckd_cleanup); |