diff options
Diffstat (limited to 'drivers/s390/block/dasd_eckd.c')
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 4384 |
1 files changed, 3422 insertions, 962 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index e61a6deea3c0..b08e900687f3 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> * Horst Hummel <Horst.Hummel@de.ibm.com> @@ -9,49 +10,31 @@ * 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 <linux/uaccess.h> +#include <linux/io.h> #include <asm/css_chars.h> +#include <asm/machine.h> #include <asm/debug.h> #include <asm/idals.h> #include <asm/ebcdic.h> -#include <asm/io.h> -#include <asm/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 @@ -61,6 +44,7 @@ /* 64k are 128 x 512 byte sectors */ #define DASD_RAW_SECTORS_PER_TRACK 128 +MODULE_DESCRIPTION("S/390 DASD ECKD Disks device driver"); MODULE_LICENSE("GPL"); static struct dasd_discipline dasd_eckd_discipline; @@ -85,6 +69,8 @@ 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 @@ -97,8 +83,21 @@ static struct { } *dasd_reserve_req; static DEFINE_MUTEX(dasd_reserve_mutex); +static struct { + struct dasd_ccw_req cqr; + struct ccw1 ccw[2]; + char data[40]; +} *dasd_vol_info_req; +static DEFINE_MUTEX(dasd_vol_info_mutex); + +struct ext_pool_exhaust_work_data { + struct work_struct worker; + struct dasd_device *device; + struct dasd_device *base; +}; + /* definitions for the path verification worker */ -struct path_verification_work_data { +struct pe_handler_work_data { struct work_struct worker; struct dasd_device *device; struct dasd_ccw_req cqr; @@ -106,9 +105,24 @@ struct path_verification_work_data { __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; int isglobal; __u8 tbvpm; + __u8 fcsecpm; }; -static struct path_verification_work_data *path_verification_worker; -static DEFINE_MUTEX(dasd_path_verification_mutex); +static struct pe_handler_work_data *pe_handler_worker; +static DEFINE_MUTEX(dasd_pe_handler_mutex); + +struct check_attention_work_data { + struct work_struct worker; + struct dasd_device *device; + __u8 lpum; +}; + +static int dasd_eckd_ext_pool_id(struct dasd_device *); +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); +static int dasd_eckd_query_pprc_status(struct dasd_device *, + struct dasd_pprc_data_sc4 *); /* initial attempt at a probe function. this can be simplified once * the other detection code is gone */ @@ -126,7 +140,7 @@ dasd_eckd_probe (struct ccw_device *cdev) "ccw-device options"); return ret; } - ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); + ret = dasd_generic_probe(cdev); return ret; } @@ -140,17 +154,10 @@ 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_head[] = { 0, 0, 0, 0, 1 }; 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; @@ -197,47 +204,88 @@ static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) geo->head |= head; } -static int -check_XRC (struct ccw1 *de_ccw, - struct DE_eckd_data *data, - struct dasd_device *device) +/* + * calculate failing track from sense data depending if + * it is an EAV device or not + */ +static int dasd_eckd_track_from_irb(struct irb *irb, struct dasd_device *device, + sector_t *track) +{ + struct dasd_eckd_private *private = device->private; + u8 *sense = NULL; + u32 cyl; + u8 head; + + sense = dasd_get_sense(irb); + if (!sense) { + DBF_DEV_EVENT(DBF_WARNING, device, "%s", + "ESE error no sense data\n"); + return -EINVAL; + } + if (!(sense[27] & DASD_SENSE_BIT_2)) { + DBF_DEV_EVENT(DBF_WARNING, device, "%s", + "ESE error no valid track data\n"); + return -EINVAL; + } + + if (sense[27] & DASD_SENSE_BIT_3) { + /* enhanced addressing */ + cyl = sense[30] << 20; + cyl |= (sense[31] & 0xF0) << 12; + cyl |= sense[28] << 8; + cyl |= sense[29]; + } else { + cyl = sense[29] << 8; + cyl |= sense[30]; + } + head = sense[31] & 0x0F; + *track = cyl * private->rdc_data.trk_per_cyl + head; + return 0; +} + +static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, + struct dasd_device *device) { - struct dasd_eckd_private *private; + struct dasd_eckd_private *private = device->private; int rc; - private = (struct dasd_eckd_private *) device->private; - if (!private->rdc_data.facilities.XRC_supported) + rc = get_phys_clock(&data->ep_sys_time); + /* + * Ignore return code if XRC is not supported or + * sync clock is switched off + */ + if ((rc && !private->rdc_data.facilities.XRC_supported) || + rc == -EOPNOTSUPP || rc == -EACCES) return 0; - /* switch on System Time Stamp - needed for XRC Support */ + /* 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_sync_clock(&data->ep_sys_time); - /* Ignore return code if sync clock is switched off. */ - if (rc == -EOPNOTSUPP || rc == -EACCES) - rc = 0; + if (ccw) { + ccw->count = sizeof(struct DE_eckd_data); + ccw->flags |= CCW_FLAG_SLI; + } - 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) + unsigned int totrk, int cmd, struct dasd_device *device, + int blksize) { - struct dasd_eckd_private *private; - u32 begcyl, endcyl; + struct dasd_eckd_private *private = device->private; u16 heads, beghead, endhead; + u32 begcyl, endcyl; int rc = 0; - private = (struct dasd_eckd_private *) device->private; - - ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; - ccw->flags = 0; - ccw->count = 16; - ccw->cda = (__u32) __pa(data); + if (ccw) { + ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; + ccw->flags = 0; + ccw->count = 16; + ccw->cda = virt_to_dma32(data); + } memset(data, 0, sizeof(struct DE_eckd_data)); switch (cmd) { @@ -249,9 +297,18 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 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_READ_TRACK: + case DASD_ECKD_CCW_READ_TRACK_DATA: + data->mask.perm = 0x1; data->attributes.operation = private->attrib.operation; + data->blk_size = 0; break; case DASD_ECKD_CCW_WRITE: case DASD_ECKD_CCW_WRITE_MT: @@ -259,12 +316,12 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, case DASD_ECKD_CCW_WRITE_KD_MT: data->mask.perm = 0x02; data->attributes.operation = private->attrib.operation; - rc = check_XRC (ccw, data, device); + rc = set_timestamp(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); + rc = set_timestamp(ccw, data, device); break; case DASD_ECKD_CCW_ERASE: case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: @@ -272,7 +329,18 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, data->mask.perm = 0x3; data->mask.auth = 0x1; data->attributes.operation = DASD_BYPASS_CACHE; - rc = check_XRC (ccw, data, device); + rc = set_timestamp(ccw, data, device); + break; + case DASD_ECKD_CCW_WRITE_FULL_TRACK: + data->mask.perm = 0x03; + data->attributes.operation = private->attrib.operation; + data->blk_size = 0; + break; + case DASD_ECKD_CCW_WRITE_TRACK_DATA: + data->mask.perm = 0x02; + data->attributes.operation = private->attrib.operation; + data->blk_size = blksize; + rc = set_timestamp(ccw, data, device); break; default: dev_err(&device->cdev->dev, @@ -309,38 +377,25 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, return rc; } -static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, - struct dasd_device *device) -{ - struct dasd_eckd_private *private; - int rc; - - private = (struct dasd_eckd_private *) device->private; - 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_sync_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) +static void locate_record_ext(struct ccw1 *ccw, 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; + struct dasd_eckd_private *private = device->private; int sector; int dn, d; - private = (struct dasd_eckd_private *) device->private; + if (ccw) { + ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; + ccw->flags = 0; + if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) + ccw->count = 22; + else + ccw->count = 20; + ccw->cda = virt_to_dma32(data); + } memset(data, 0, sizeof(*data)); sector = 0; @@ -468,18 +523,16 @@ static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int 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 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; + struct DE_eckd_data *dedata; int rc = 0; - basepriv = (struct dasd_eckd_private *) basedev->private; - startpriv = (struct dasd_eckd_private *) startdev->private; + basepriv = basedev->private; + startpriv = startdev->private; dedata = &pfxdata->define_extent; lredata = &pfxdata->locate_record; @@ -487,11 +540,11 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, ccw->flags = 0; if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { ccw->count = sizeof(*pfxdata) + 2; - ccw->cda = (__u32) __pa(pfxdata); + ccw->cda = virt_to_dma32(pfxdata); memset(pfxdata, 0, sizeof(*pfxdata) + 2); } else { ccw->count = sizeof(*pfxdata); - ccw->cda = (__u32) __pa(pfxdata); + ccw->cda = virt_to_dma32(pfxdata); memset(pfxdata, 0, sizeof(*pfxdata)); } @@ -503,106 +556,32 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, return -EINVAL; } pfxdata->format = format; - pfxdata->base_address = basepriv->ned->unit_addr; - pfxdata->base_lss = basepriv->ned->ID; + pfxdata->base_address = basepriv->conf.ned->unit_addr; + pfxdata->base_lss = basepriv->conf.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) { + if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 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: - case DASD_ECKD_CCW_READ_COUNT: - dedata->mask.perm = 0x1; - dedata->attributes.operation = basepriv->attrib.operation; - 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; + if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { + pfxdata->validity.verify_base = 1; + pfxdata->validity.hyper_pav = 1; } - 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 */ + rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); - 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); + /* + * For some commands the System Time Stamp is set in the define extent + * data when XRC is supported. The validity of the time stamp must be + * reflected in the prefix data as well. + */ + if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) + pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ if (format == 1) { - fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, - basedev, blksize, tlf); + locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, + basedev, blksize, tlf); } return rc; @@ -621,12 +600,10 @@ 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; + struct dasd_eckd_private *private = device->private; int sector; int dn, d; - private = (struct dasd_eckd_private *) device->private; - DBF_DEV_EVENT(DBF_INFO, device, "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", trk, rec_on_trk, no_rec, cmd, reclen); @@ -634,7 +611,7 @@ locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; ccw->flags = 0; ccw->count = 16; - ccw->cda = (__u32) __pa(data); + ccw->cda = virt_to_dma32(data); memset(data, 0, sizeof(struct LO_eckd_data)); sector = 0; @@ -755,32 +732,30 @@ dasd_eckd_cdl_reclen(int recid) return LABEL_SIZE; } /* create unique id from private structure. */ -static void create_uid(struct dasd_eckd_private *private) +static void create_uid(struct dasd_conf *conf, struct dasd_uid *uid) { int count; - struct dasd_uid *uid; - uid = &private->uid; memset(uid, 0, sizeof(struct dasd_uid)); - memcpy(uid->vendor, private->ned->HDA_manufacturer, + memcpy(uid->vendor, conf->ned->HDA_manufacturer, sizeof(uid->vendor) - 1); EBCASC(uid->vendor, sizeof(uid->vendor) - 1); - memcpy(uid->serial, private->ned->HDA_location, + memcpy(uid->serial, &conf->ned->serial, 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; + uid->ssid = conf->gneq->subsystemID; + uid->real_unit_addr = conf->ned->unit_addr; + if (conf->sneq) { + uid->type = conf->sneq->sua_flags; if (uid->type == UA_BASE_PAV_ALIAS) - uid->base_unit_addr = private->sneq->base_unit_addr; + uid->base_unit_addr = conf->sneq->base_unit_addr; } else { uid->type = UA_BASE_DEVICE; } - if (private->vdsneq) { + if (conf->vdsneq) { for (count = 0; count < 16; count++) { sprintf(uid->vduit+2*count, "%02x", - private->vdsneq->uit[count]); + conf->vdsneq->uit[count]); } } } @@ -790,27 +765,25 @@ static void create_uid(struct dasd_eckd_private *private) */ static int dasd_eckd_generate_uid(struct dasd_device *device) { - struct dasd_eckd_private *private; + struct dasd_eckd_private *private = device->private; unsigned long flags; - private = (struct dasd_eckd_private *) device->private; if (!private) return -ENODEV; - if (!private->ned || !private->gneq) + if (!private->conf.ned || !private->conf.gneq) return -ENODEV; spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); - create_uid(private); + create_uid(&private->conf, &private->uid); 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; + struct dasd_eckd_private *private = device->private; unsigned long flags; - if (device->private) { - private = (struct dasd_eckd_private *)device->private; + if (private) { spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); *uid = private->uid; spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); @@ -824,14 +797,15 @@ static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) * return 0 for match */ static int dasd_eckd_compare_path_uid(struct dasd_device *device, - struct dasd_eckd_private *private) + struct dasd_conf *path_conf) { struct dasd_uid device_uid; + struct dasd_uid path_uid; - create_uid(private); + create_uid(path_conf, &path_uid); dasd_eckd_get_uid(device, &device_uid); - return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); + return memcmp(&device_uid, &path_uid, sizeof(struct dasd_uid)); } static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, @@ -852,7 +826,7 @@ static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, ccw = cqr->cpaddr; ccw->cmd_code = DASD_ECKD_CCW_RCD; ccw->flags = 0; - ccw->cda = (__u32)(addr_t)rcd_buffer; + ccw->cda = virt_to_dma32(rcd_buffer); ccw->count = DASD_ECKD_RCD_DATA_SIZE; cqr->magic = DASD_ECKD_MAGIC; @@ -880,7 +854,7 @@ static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) if (cqr->status != DASD_CQR_DONE) { ccw = cqr->cpaddr; - rcd_buffer = (__u8 *)((addr_t) ccw->cda); + rcd_buffer = dma32_to_virt(ccw->cda); memset(rcd_buffer, 0, sizeof(*rcd_buffer)); rcd_buffer[0] = 0xE5; @@ -940,7 +914,7 @@ static int dasd_eckd_read_conf_lpm(struct dasd_device *device, } cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 0, /* use rcd_buf as data ara */ - device); + device, NULL); if (IS_ERR(cqr)) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Could not allocate RCD request"); @@ -967,34 +941,34 @@ out_error: return ret; } -static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) +static int dasd_eckd_identify_conf_parts(struct dasd_conf *conf) { 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; + conf->ned = NULL; + conf->sneq = NULL; + conf->vdsneq = NULL; + conf->gneq = NULL; + count = conf->len / sizeof(struct dasd_sneq); + sneq = (struct dasd_sneq *)conf->data; for (i = 0; i < count; ++i) { if (sneq->flags.identifier == 1 && sneq->format == 1) - private->sneq = sneq; + conf->sneq = sneq; else if (sneq->flags.identifier == 1 && sneq->format == 4) - private->vdsneq = (struct vd_sneq *)sneq; + conf->vdsneq = (struct vd_sneq *)sneq; else if (sneq->flags.identifier == 2) - private->gneq = (struct dasd_gneq *)sneq; + conf->gneq = (struct dasd_gneq *)sneq; else if (sneq->flags.identifier == 3 && sneq->res1 == 1) - private->ned = (struct dasd_ned *)sneq; + conf->ned = (struct dasd_ned *)sneq; sneq++; } - if (!private->ned || !private->gneq) { - private->ned = NULL; - private->sneq = NULL; - private->vdsneq = NULL; - private->gneq = NULL; + if (!conf->ned || !conf->gneq) { + conf->ned = NULL; + conf->sneq = NULL; + conf->vdsneq = NULL; + conf->gneq = NULL; return -EINVAL; } return 0; @@ -1022,19 +996,119 @@ static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) return 0; } +static void dasd_eckd_store_conf_data(struct dasd_device *device, + struct dasd_conf_data *conf_data, int chp) +{ + struct dasd_eckd_private *private = device->private; + struct channel_path_desc_fmt0 *chp_desc; + struct subchannel_id sch_id; + void *cdp; + + /* + * path handling and read_conf allocate data + * free it before replacing the pointer + * also replace the old private->conf_data pointer + * with the new one if this points to the same data + */ + cdp = device->path[chp].conf_data; + if (private->conf.data == cdp) { + private->conf.data = (void *)conf_data; + dasd_eckd_identify_conf_parts(&private->conf); + } + ccw_device_get_schid(device->cdev, &sch_id); + device->path[chp].conf_data = conf_data; + device->path[chp].cssid = sch_id.cssid; + device->path[chp].ssid = sch_id.ssid; + chp_desc = ccw_device_get_chp_desc(device->cdev, chp); + if (chp_desc) + device->path[chp].chpid = chp_desc->chpid; + kfree(chp_desc); + kfree(cdp); +} + +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; + dasd_path_notoper(device, i); + } +} + +static void dasd_eckd_read_fc_security(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + u8 esm_valid; + u8 esm[8]; + int chp; + int rc; + + rc = chsc_scud(private->uid.ssid, (u64 *)esm, &esm_valid); + if (rc) { + for (chp = 0; chp < 8; chp++) + device->path[chp].fc_security = 0; + return; + } + + for (chp = 0; chp < 8; chp++) { + if (esm_valid & (0x80 >> chp)) + device->path[chp].fc_security = esm[chp]; + else + device->path[chp].fc_security = 0; + } +} + +static void dasd_eckd_get_uid_string(struct dasd_conf *conf, char *print_uid) +{ + struct dasd_uid uid; + + create_uid(conf, &uid); + snprintf(print_uid, DASD_UID_STRLEN, "%s.%s.%04x.%02x%s%s", + uid.vendor, uid.serial, uid.ssid, uid.real_unit_addr, + uid.vduit[0] ? "." : "", uid.vduit); +} + +static int dasd_eckd_check_cabling(struct dasd_device *device, + void *conf_data, __u8 lpm) +{ + char print_path_uid[DASD_UID_STRLEN], print_device_uid[DASD_UID_STRLEN]; + struct dasd_eckd_private *private = device->private; + struct dasd_conf path_conf; + + path_conf.data = conf_data; + path_conf.len = DASD_ECKD_RCD_DATA_SIZE; + if (dasd_eckd_identify_conf_parts(&path_conf)) + return 1; + + if (dasd_eckd_compare_path_uid(device, &path_conf)) { + dasd_eckd_get_uid_string(&path_conf, print_path_uid); + dasd_eckd_get_uid_string(&private->conf, print_device_uid); + 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); + return 1; + } + + return 0; +} + static int dasd_eckd_read_conf(struct dasd_device *device) { void *conf_data; int conf_len, conf_data_saved; - int rc, path_err; + int rc, path_err, pos; __u8 lpm, opm; - struct dasd_eckd_private *private, path_private; - struct dasd_path *path_data; - struct dasd_uid *uid; - char print_path_uid[60], print_device_uid[60]; + struct dasd_eckd_private *private; - private = (struct dasd_eckd_private *) device->private; - path_data = &device->path_data; + private = device->private; opm = ccw_device_get_path_mask(device->cdev); conf_data_saved = 0; path_err = 0; @@ -1055,17 +1129,18 @@ static int dasd_eckd_read_conf(struct dasd_device *device) "No configuration data " "retrieved"); /* no further analysis possible */ - path_data->opm |= lpm; + dasd_path_add_opm(device, opm); continue; /* no error */ } /* save first valid configuration data */ if (!conf_data_saved) { - kfree(private->conf_data); - 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; + /* 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->conf)) { + private->conf.data = NULL; + private->conf.len = 0; kfree(conf_data); continue; } @@ -1075,95 +1150,78 @@ static int dasd_eckd_read_conf(struct dasd_device *device) */ 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; - } + } else if (dasd_eckd_check_cabling(device, conf_data, lpm)) { + dasd_path_add_cablepm(device, lpm); + path_err = -EINVAL; + 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; - continue; - } + pos = pathmask_to_pos(lpm); + dasd_eckd_store_conf_data(device, conf_data, pos); - path_private.conf_data = NULL; - path_private.conf_len = 0; - } switch (dasd_eckd_path_access(conf_data, conf_len)) { case 0x02: - path_data->npm |= lpm; + dasd_path_add_nppm(device, lpm); break; case 0x03: - path_data->ppm |= lpm; + dasd_path_add_ppm(device, lpm); break; } - path_data->opm |= lpm; - - if (conf_data != private->conf_data) - kfree(conf_data); + 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; + unsigned int mdc; + int tpm; + + if (dasd_nofcx) + return 0; + /* is transport mode supported? */ + fcx_in_css = css_general_characteristics.fcx; + fcx_in_gneq = private->conf.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; - int mdc; + struct dasd_eckd_private *private = device->private; + unsigned int mdc; u32 fcx_max_data; - private = (struct dasd_eckd_private *) device->private; if (private->fcx_max_data) { mdc = ccw_device_get_mdc(device->cdev, lpm); - if ((mdc < 0)) { + 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 = mdc * FCX_MAX_DATA_FACTOR; + 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 " @@ -1177,17 +1235,11 @@ static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) } static int rebuild_device_uid(struct dasd_device *device, - struct path_verification_work_data *data) + struct pe_handler_work_data *data) { - struct dasd_eckd_private *private; - struct dasd_path *path_data; - __u8 lpm, opm; - int rc; - - rc = -ENODEV; - private = (struct dasd_eckd_private *) device->private; - path_data = &device->path_data; - opm = device->path_data.opm; + 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)) @@ -1207,9 +1259,9 @@ static int rebuild_device_uid(struct dasd_device *device, "returned error %d", rc); break; } - memcpy(private->conf_data, data->rcd_buffer, + memcpy(private->conf.data, data->rcd_buffer, DASD_ECKD_RCD_DATA_SIZE); - if (dasd_eckd_identify_conf_parts(private)) { + if (dasd_eckd_identify_conf_parts(&private->conf)) { rc = -ENODEV; } else /* first valid path is enough */ break; @@ -1221,31 +1273,24 @@ static int rebuild_device_uid(struct dasd_device *device, return rc; } -static void do_path_verification_work(struct work_struct *work) +static void dasd_eckd_path_available_action(struct dasd_device *device, + struct pe_handler_work_data *data) { - 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; + __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; + struct dasd_conf_data *conf_data; + char print_uid[DASD_UID_STRLEN]; + struct dasd_conf path_conf; 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; - } + int rc, pos; opm = 0; npm = 0; ppm = 0; epm = 0; + hpfpm = 0; + cablepm = 0; + for (lpm = 0x80; lpm; lpm >>= 1) { if (!(lpm & data->tbvpm)) continue; @@ -1287,6 +1332,7 @@ static void do_path_verification_work(struct work_struct *work) opm &= ~lpm; npm &= ~lpm; ppm &= ~lpm; + hpfpm |= lpm; continue; } @@ -1297,11 +1343,11 @@ static void do_path_verification_work(struct work_struct *work) */ 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; + path_conf.data = (void *)&path_rcd_buf; + path_conf.len = DASD_ECKD_RCD_DATA_SIZE; + if (dasd_eckd_identify_conf_parts(&path_conf)) { + path_conf.data = NULL; + path_conf.len = 0; continue; } @@ -1311,8 +1357,8 @@ static void do_path_verification_work(struct work_struct *work) * in other case the device UID may have changed and * the first working path UID will be used as device UID */ - if (device->path_data.opm && - dasd_eckd_compare_path_uid(device, &path_private)) { + if (dasd_path_get_opm(device) && + dasd_eckd_compare_path_uid(device, &path_conf)) { /* * the comparison was not successful * rebuild the device UID with at least one @@ -1326,20 +1372,8 @@ static void do_path_verification_work(struct work_struct *work) */ 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); + device, &path_conf)) { + dasd_eckd_get_uid_string(&path_conf, print_uid); dev_err(&device->cdev->dev, "The newly added channel path %02X " "will not be used because it leads " @@ -1348,10 +1382,27 @@ static void do_path_verification_work(struct work_struct *work) opm &= ~lpm; npm &= ~lpm; ppm &= ~lpm; + cablepm |= lpm; continue; } } + conf_data = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL); + if (conf_data) { + memcpy(conf_data, data->rcd_buffer, + DASD_ECKD_RCD_DATA_SIZE); + } else { + /* + * path is operational but path config data could not + * be stored due to low mem condition + * add it to the error path mask and schedule a path + * verification later that this could be added again + */ + epm |= lpm; + } + pos = pathmask_to_pos(lpm); + dasd_eckd_store_conf_data(device, conf_data, pos); + /* * There is a small chance that a path is lost again between * above path verification and the following modification of @@ -1360,62 +1411,108 @@ static void do_path_verification_work(struct work_struct *work) * situation in dasd_start_IO. */ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); - if (!device->path_data.opm && opm) { - device->path_data.opm = opm; + if (!dasd_path_get_opm(device) && opm) { + dasd_path_set_opm(device, opm); dasd_generic_path_operational(device); - } else - device->path_data.opm |= opm; - device->path_data.npm |= npm; - device->path_data.ppm |= ppm; - device->path_data.tbvpm |= epm; + } else { + dasd_path_add_opm(device, opm); + } + dasd_path_add_nppm(device, npm); + dasd_path_add_ppm(device, ppm); + if (epm) { + dasd_path_add_tbvpm(device, epm); + dasd_device_set_timer(device, 50); + } + dasd_path_add_cablepm(device, cablepm); + dasd_path_add_nohpfpm(device, hpfpm); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); + + dasd_path_create_kobj(device, pos); + } +} + +static void do_pe_handler_work(struct work_struct *work) +{ + struct pe_handler_work_data *data; + struct dasd_device *device; + + data = container_of(work, struct pe_handler_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; } + if (data->tbvpm) + dasd_eckd_path_available_action(device, data); + if (data->fcsecpm) + dasd_eckd_read_fc_security(device); + + clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); dasd_put_device(device); if (data->isglobal) - mutex_unlock(&dasd_path_verification_mutex); + mutex_unlock(&dasd_pe_handler_mutex); else kfree(data); } -static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) +static int dasd_eckd_pe_handler(struct dasd_device *device, + __u8 tbvpm, __u8 fcsecpm) { - struct path_verification_work_data *data; + struct pe_handler_work_data *data; - data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); + data = kzalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); if (!data) { - if (mutex_trylock(&dasd_path_verification_mutex)) { - data = path_verification_worker; + if (mutex_trylock(&dasd_pe_handler_mutex)) { + data = pe_handler_worker; data->isglobal = 1; - } else + } else { return -ENOMEM; - } else { - memset(data, 0, sizeof(*data)); - data->isglobal = 0; + } } - INIT_WORK(&data->worker, do_path_verification_work); + INIT_WORK(&data->worker, do_pe_handler_work); dasd_get_device(device); data->device = device; - data->tbvpm = lpm; + data->tbvpm = tbvpm; + data->fcsecpm = fcsecpm; 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; - struct dasd_eckd_private *private; - private = (struct dasd_eckd_private *) device->private; 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); + device, NULL); if (IS_ERR(cqr)) { DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " "allocate initialization request"); @@ -1438,7 +1535,7 @@ static int dasd_eckd_read_features(struct dasd_device *device) 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; + ccw->cda = virt_to_dma32(prssdp); /* Read Subsystem Data - feature codes */ features = (struct dasd_rssd_features *) (prssdp + 1); @@ -1447,7 +1544,7 @@ static int dasd_eckd_read_features(struct dasd_device *device) ccw++; ccw->cmd_code = DASD_ECKD_CCW_RSSD; ccw->count = sizeof(struct dasd_rssd_features); - ccw->cda = (__u32)(addr_t) features; + ccw->cda = virt_to_dma32(features); cqr->buildclk = get_tod_clock(); cqr->status = DASD_CQR_FILLED; @@ -1464,6 +1561,311 @@ static int dasd_eckd_read_features(struct dasd_device *device) return rc; } +/* Read Volume Information - Volume Storage Query */ +static int dasd_eckd_read_vol_info(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + struct dasd_psf_prssd_data *prssdp; + struct dasd_rssd_vsq *vsq; + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; + int useglobal; + int rc; + + /* This command cannot be executed on an alias device */ + if (private->uid.type == UA_BASE_PAV_ALIAS || + private->uid.type == UA_HYPER_PAV_ALIAS) + return 0; + + useglobal = 0; + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, + sizeof(*prssdp) + sizeof(*vsq), device, NULL); + if (IS_ERR(cqr)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "Could not allocate initialization request"); + mutex_lock(&dasd_vol_info_mutex); + useglobal = 1; + cqr = &dasd_vol_info_req->cqr; + memset(cqr, 0, sizeof(*cqr)); + memset(dasd_vol_info_req, 0, sizeof(*dasd_vol_info_req)); + cqr->cpaddr = &dasd_vol_info_req->ccw; + cqr->data = &dasd_vol_info_req->data; + cqr->magic = DASD_ECKD_MAGIC; + } + + /* Prepare for Read Subsystem Data */ + prssdp = cqr->data; + prssdp->order = PSF_ORDER_PRSSD; + prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ + prssdp->lss = private->conf.ned->ID; + prssdp->volume = private->conf.ned->unit_addr; + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_PSF; + ccw->count = sizeof(*prssdp); + ccw->flags |= CCW_FLAG_CC; + ccw->cda = virt_to_dma32(prssdp); + + /* Read Subsystem Data - Volume Storage Query */ + vsq = (struct dasd_rssd_vsq *)(prssdp + 1); + memset(vsq, 0, sizeof(*vsq)); + + ccw++; + ccw->cmd_code = DASD_ECKD_CCW_RSSD; + ccw->count = sizeof(*vsq); + ccw->flags |= CCW_FLAG_SLI; + ccw->cda = virt_to_dma32(vsq); + + cqr->buildclk = get_tod_clock(); + cqr->status = DASD_CQR_FILLED; + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; + cqr->retries = 256; + cqr->expires = device->default_expires * HZ; + /* The command might not be supported. Suppress the error output */ + __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); + + rc = dasd_sleep_on_interruptible(cqr); + if (rc == 0) { + memcpy(&private->vsq, vsq, sizeof(*vsq)); + } else { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "Reading the volume storage information failed with rc=%d", rc); + } + + if (useglobal) + mutex_unlock(&dasd_vol_info_mutex); + else + dasd_sfree_request(cqr, cqr->memdev); + + return rc; +} + +static int dasd_eckd_is_ese(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + + return private->vsq.vol_info.ese; +} + +static int dasd_eckd_ext_pool_id(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + + return private->vsq.extent_pool_id; +} + +/* + * This value represents the total amount of available space. As more space is + * allocated by ESE volumes, this value will decrease. + * The data for this value is therefore updated on any call. + */ +static int dasd_eckd_space_configured(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + int rc; + + rc = dasd_eckd_read_vol_info(device); + + return rc ? : private->vsq.space_configured; +} + +/* + * The value of space allocated by an ESE volume may have changed and is + * therefore updated on any call. + */ +static int dasd_eckd_space_allocated(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + int rc; + + rc = dasd_eckd_read_vol_info(device); + + return rc ? : private->vsq.space_allocated; +} + +static int dasd_eckd_logical_capacity(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + + return private->vsq.logical_capacity; +} + +static void dasd_eckd_ext_pool_exhaust_work(struct work_struct *work) +{ + struct ext_pool_exhaust_work_data *data; + struct dasd_device *device; + struct dasd_device *base; + + data = container_of(work, struct ext_pool_exhaust_work_data, worker); + device = data->device; + base = data->base; + + if (!base) + base = device; + if (dasd_eckd_space_configured(base) != 0) { + dasd_generic_space_avail(device); + } else { + dev_warn(&device->cdev->dev, "No space left in the extent pool\n"); + DBF_DEV_EVENT(DBF_WARNING, device, "%s", "out of space"); + } + + dasd_put_device(device); + kfree(data); +} + +static int dasd_eckd_ext_pool_exhaust(struct dasd_device *device, + struct dasd_ccw_req *cqr) +{ + struct ext_pool_exhaust_work_data *data; + + data = kzalloc(sizeof(*data), GFP_ATOMIC); + if (!data) + return -ENOMEM; + INIT_WORK(&data->worker, dasd_eckd_ext_pool_exhaust_work); + dasd_get_device(device); + data->device = device; + + if (cqr->block) + data->base = cqr->block->base; + else if (cqr->basedev) + data->base = cqr->basedev; + else + data->base = NULL; + + schedule_work(&data->worker); + + return 0; +} + +static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, + struct dasd_rssd_lcq *lcq) +{ + struct dasd_eckd_private *private = device->private; + int pool_id = dasd_eckd_ext_pool_id(device); + struct dasd_ext_pool_sum eps; + int i; + + for (i = 0; i < lcq->pool_count; i++) { + eps = lcq->ext_pool_sum[i]; + if (eps.pool_id == pool_id) { + memcpy(&private->eps, &eps, + sizeof(struct dasd_ext_pool_sum)); + } + } +} + +/* Read Extent Pool Information - Logical Configuration Query */ +static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + struct dasd_psf_prssd_data *prssdp; + struct dasd_rssd_lcq *lcq; + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; + int rc; + + /* This command cannot be executed on an alias device */ + if (private->uid.type == UA_BASE_PAV_ALIAS || + private->uid.type == UA_HYPER_PAV_ALIAS) + return 0; + + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, + sizeof(*prssdp) + sizeof(*lcq), device, NULL); + if (IS_ERR(cqr)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "Could not allocate initialization request"); + return PTR_ERR(cqr); + } + + /* Prepare for Read Subsystem Data */ + prssdp = cqr->data; + memset(prssdp, 0, sizeof(*prssdp)); + prssdp->order = PSF_ORDER_PRSSD; + prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_PSF; + ccw->count = sizeof(*prssdp); + ccw->flags |= CCW_FLAG_CC; + ccw->cda = virt_to_dma32(prssdp); + + lcq = (struct dasd_rssd_lcq *)(prssdp + 1); + memset(lcq, 0, sizeof(*lcq)); + + ccw++; + ccw->cmd_code = DASD_ECKD_CCW_RSSD; + ccw->count = sizeof(*lcq); + ccw->flags |= CCW_FLAG_SLI; + ccw->cda = virt_to_dma32(lcq); + + cqr->buildclk = get_tod_clock(); + cqr->status = DASD_CQR_FILLED; + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; + cqr->retries = 256; + cqr->expires = device->default_expires * HZ; + /* The command might not be supported. Suppress the error output */ + __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); + + rc = dasd_sleep_on_interruptible(cqr); + if (rc == 0) { + dasd_eckd_cpy_ext_pool_data(device, lcq); + } else { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "Reading the logical configuration failed with rc=%d", rc); + } + + dasd_sfree_request(cqr, cqr->memdev); + + return rc; +} + +/* + * Depending on the device type, the extent size is specified either as + * cylinders per extent (CKD) or size per extent (FBA) + * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. + */ +static int dasd_eckd_ext_size(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + struct dasd_ext_pool_sum eps = private->eps; + + if (!eps.flags.extent_size_valid) + return 0; + if (eps.extent_size.size_1G) + return 1113; + if (eps.extent_size.size_16M) + return 21; + + return 0; +} + +static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + + return private->eps.warn_thrshld; +} + +static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + + return private->eps.flags.capacity_at_warnlevel; +} + +/* + * Extent Pool out of space + */ +static int dasd_eckd_ext_pool_oos(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + + return private->eps.flags.pool_oos; +} /* * Build CP for Perform Subsystem Function - SSC. @@ -1477,7 +1879,7 @@ static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , sizeof(struct dasd_psf_ssc_data), - device); + device, NULL); if (IS_ERR(cqr)) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", @@ -1493,7 +1895,7 @@ static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, } ccw = cqr->cpaddr; ccw->cmd_code = DASD_ECKD_CCW_PSF; - ccw->cda = (__u32)(addr_t)psf_ssc_data; + ccw->cda = virt_to_dma32(psf_ssc_data); ccw->count = 66; cqr->startdev = device; @@ -1545,15 +1947,13 @@ dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, static int dasd_eckd_validate_server(struct dasd_device *device, unsigned long flags) { - int rc; - struct dasd_eckd_private *private; - int enable_pav; + struct dasd_eckd_private *private = device->private; + int enable_pav, rc; - private = (struct dasd_eckd_private *) device->private; if (private->uid.type == UA_BASE_PAV_ALIAS || private->uid.type == UA_HYPER_PAV_ALIAS) return 0; - if (dasd_nopav || MACHINE_IS_VM) + if (dasd_nopav || machine_is_vm()) enable_pav = 0; else enable_pav = 1; @@ -1596,38 +1996,51 @@ static void dasd_eckd_kick_validate_server(struct dasd_device *device) return; } /* queue call to do_validate_server to the kernel event daemon. */ - schedule_work(&device->kick_validate); + if (!schedule_work(&device->kick_validate)) + dasd_put_device(device); } -static u32 get_fcx_max_data(struct dasd_device *device) +/* + * return if the device is the copy relation primary if a copy relation is active + */ +static int dasd_device_is_primary(struct dasd_device *device) { -#if defined(CONFIG_64BIT) - int tpm, mdc; - int fcx_in_css, fcx_in_gneq, fcx_in_features; - struct dasd_eckd_private *private; + if (!device->copy) + return 1; - if (dasd_nofcx) - return 0; - /* is transport mode supported? */ - private = (struct dasd_eckd_private *) device->private; - 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 (device->copy->active->device == device) + return 1; - if (!tpm) - return 0; + 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"); +static int dasd_eckd_alloc_block(struct dasd_device *device) +{ + struct dasd_block *block; + struct dasd_uid temp_uid; + + if (!dasd_device_is_primary(device)) return 0; - } else - return mdc * FCX_MAX_DATA_FACTOR; -#else + + 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"); + return PTR_ERR(block); + } + device->block = block; + block->base = device; + } return 0; -#endif +} + +static bool dasd_eckd_pprc_enabled(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + + return private->rdc_data.facilities.PPRC_enabled; } /* @@ -1637,15 +2050,15 @@ static u32 get_fcx_max_data(struct dasd_device *device) static int dasd_eckd_check_characteristics(struct dasd_device *device) { - struct dasd_eckd_private *private; - struct dasd_block *block; - struct dasd_uid temp_uid; + struct dasd_eckd_private *private = device->private; 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, @@ -1656,7 +2069,6 @@ dasd_eckd_check_characteristics(struct dasd_device *device) dev_info(&device->cdev->dev, "The DASD is not operating in multipath mode\n"); } - private = (struct dasd_eckd_private *) device->private; if (!private) { private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); if (!private) { @@ -1665,7 +2077,7 @@ dasd_eckd_check_characteristics(struct dasd_device *device) "failed\n"); return -ENOMEM; } - device->private = (void *) private; + device->private = private; } else { memset(private, 0, sizeof(*private)); } @@ -1680,35 +2092,46 @@ dasd_eckd_check_characteristics(struct dasd_device *device) if (rc) goto out_err1; - /* set default timeout */ + /* set some default values */ device->default_expires = DASD_EXPIRES; - /* set default retry count */ device->default_retries = DASD_RETRIES; + device->path_thrhld = DASD_ECKD_PATH_THRHLD; + device->path_interval = DASD_ECKD_PATH_INTERVAL; + device->aq_timeouts = DASD_RETRIES_MAX; - if (private->gneq) { + if (private->conf.gneq) { value = 1; - for (i = 0; i < private->gneq->timeout.value; i++) + for (i = 0; i < private->conf.gneq->timeout.value; i++) value = 10 * value; - value = value * private->gneq->timeout.number; + value = value * private->conf.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; + /* 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_err1; + } + + /* setup PPRC for device from devmap */ + rc = dasd_devmap_set_device_copy_relation(device->cdev, + dasd_eckd_pprc_enabled(device)); + if (rc) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "copy relation setup failed, rc=%d", rc); + goto out_err1; } + /* check if block device is needed and allocate in case */ + rc = dasd_eckd_alloc_block(device); + if (rc) + goto out_err1; + /* register lcu with alias handling, enable PAV */ rc = dasd_alias_make_device_known_to_lcu(device); if (rc) @@ -1721,17 +2144,17 @@ dasd_eckd_check_characteristics(struct dasd_device *device) if (rc) goto out_err3; + dasd_eckd_read_fc_security(device); + dasd_path_create_kobjects(device); + /* 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; - } + /* Read Volume Information */ + dasd_eckd_read_vol_info(device); + + /* Read Extent Pool Information */ + dasd_eckd_read_ext_pool_info(device); if ((device->features & DASD_FEATURE_USERAW) && !(private->rdc_data.facilities.RT_in_LR)) { @@ -1772,7 +2195,8 @@ out_err2: dasd_free_block(device->block); device->block = NULL; out_err1: - kfree(private->conf_data); + dasd_eckd_clear_conf_data(device); + dasd_path_remove_kobjects(device); kfree(device->private); device->private = NULL; return rc; @@ -1780,23 +2204,24 @@ out_err1: static void dasd_eckd_uncheck_device(struct dasd_device *device) { - struct dasd_eckd_private *private; + struct dasd_eckd_private *private = device->private; + + if (!private) + return; - private = (struct dasd_eckd_private *) device->private; dasd_alias_disconnect_device_from_lcu(device); - private->ned = NULL; - private->sneq = NULL; - private->vdsneq = NULL; - private->gneq = NULL; - private->conf_len = 0; - kfree(private->conf_data); - private->conf_data = NULL; + private->conf.ned = NULL; + private->conf.sneq = NULL; + private->conf.vdsneq = NULL; + private->conf.gneq = NULL; + dasd_eckd_clear_conf_data(device); + dasd_path_remove_kobjects(device); } static struct dasd_ccw_req * dasd_eckd_analysis_ccw(struct dasd_device *device) { - struct dasd_eckd_private *private; + struct dasd_eckd_private *private = device->private; struct eckd_count *count_data; struct LO_eckd_data *LO_data; struct dasd_ccw_req *cqr; @@ -1804,17 +2229,16 @@ dasd_eckd_analysis_ccw(struct dasd_device *device) int cplength, datasize; int i; - private = (struct dasd_eckd_private *) device->private; - cplength = 8; datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); - cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, + NULL); 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); + /* Define extent for the first 2 tracks. */ + define_extent(ccw++, cqr->data, 0, 1, + DASD_ECKD_CCW_READ_COUNT, device, 0); 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; @@ -1827,21 +2251,21 @@ dasd_eckd_analysis_ccw(struct dasd_device *device) ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; ccw->flags = 0; ccw->count = 8; - ccw->cda = (__u32)(addr_t) count_data; + ccw->cda = virt_to_dma32(count_data); ccw++; count_data++; } - /* Locate record for the first record on track 2. */ + /* Locate record for the first record on track 1. */ ccw[-1].flags |= CCW_FLAG_CC; - locate_record(ccw++, LO_data++, 2, 0, 1, + locate_record(ccw++, LO_data++, 1, 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; + ccw->cda = virt_to_dma32(count_data); cqr->block = NULL; cqr->startdev = device; @@ -1849,6 +2273,10 @@ dasd_eckd_analysis_ccw(struct dasd_device *device) cqr->retries = 255; 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); + set_bit(DASD_CQR_SUPPRESS_IT, &cqr->flags); + return cqr; } @@ -1879,11 +2307,9 @@ static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) { - struct dasd_eckd_private *private; - struct dasd_device *device; + struct dasd_device *device = init_cqr->startdev; + struct dasd_eckd_private *private = device->private; - device = init_cqr->startdev; - private = (struct dasd_eckd_private *) device->private; private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); dasd_sfree_request(init_cqr, device); dasd_kick_device(device); @@ -1910,15 +2336,13 @@ static int dasd_eckd_start_analysis(struct dasd_block *block) static int dasd_eckd_end_analysis(struct dasd_block *block) { - struct dasd_device *device; - struct dasd_eckd_private *private; + 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; - device = block->base; - private = (struct dasd_eckd_private *) device->private; status = private->init_cqr_status; private->init_cqr_status = -1; if (status == INIT_CQR_ERROR) { @@ -1960,7 +2384,7 @@ static int dasd_eckd_end_analysis(struct dasd_block *block) } } if (i == 3) - count_area = &private->count_area[4]; + count_area = &private->count_area[3]; if (private->uses_cdl == 0) { for (i = 0; i < 5; i++) { @@ -1981,7 +2405,7 @@ static int dasd_eckd_end_analysis(struct dasd_block *block) } if (count_area != NULL && count_area->kl == 0) { - /* we found notthing violating our disk layout */ + /* we found nothing violating our disk layout */ if (dasd_check_blocksize(count_area->dl) == 0) block->bp_block = count_area->dl; } @@ -1997,14 +2421,14 @@ static int dasd_eckd_end_analysis(struct dasd_block *block) blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); raw: - block->blocks = (private->real_cyl * + block->blocks = ((unsigned long) 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, " + "DASD with %u KB/block, %lu KB total size, %u KB/track, " "%s\n", (block->bp_block >> 10), - ((private->real_cyl * + (((unsigned long) private->real_cyl * private->rdc_data.trk_per_cyl * blk_per_trk * (block->bp_block >> 9)) >> 1), ((blk_per_trk * block->bp_block) >> 10), @@ -2016,9 +2440,8 @@ raw: static int dasd_eckd_do_analysis(struct dasd_block *block) { - struct dasd_eckd_private *private; + struct dasd_eckd_private *private = block->base->private; - private = (struct dasd_eckd_private *) block->base->private; if (private->init_cqr_status < 0) return dasd_eckd_start_analysis(block); else @@ -2032,12 +2455,15 @@ static int dasd_eckd_basic_to_ready(struct dasd_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); + if (cancel_work_sync(&device->reload_device)) + dasd_put_device(device); + if (cancel_work_sync(&device->kick_validate)) + dasd_put_device(device); + return 0; }; -static int dasd_eckd_ready_to_basic(struct dasd_device *device) +static int dasd_eckd_basic_to_known(struct dasd_device *device) { return dasd_alias_remove_device(device); }; @@ -2045,9 +2471,8 @@ static int dasd_eckd_ready_to_basic(struct dasd_device *device) static int dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) { - struct dasd_eckd_private *private; + struct dasd_eckd_private *private = block->base->private; - private = (struct dasd_eckd_private *) block->base->private; if (dasd_check_blocksize(block->bp_block) == 0) { geo->sectors = recs_per_track(&private->rdc_data, 0, block->bp_block); @@ -2057,13 +2482,184 @@ dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) return 0; } +/* + * Build the TCW request for the format check + */ static struct dasd_ccw_req * -dasd_eckd_build_format(struct dasd_device *base, - struct format_data_t *fdata) +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_fmalloc_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_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_fmalloc_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, 0); + + 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 = virt_to_dma32(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 dasd_device *startdev, + struct format_data_t *fdata, int enable_pav) { struct dasd_eckd_private *base_priv; struct dasd_eckd_private *start_priv; - struct dasd_device *startdev; struct dasd_ccw_req *fcp; struct eckd_count *ect; struct ch_t address; @@ -2075,13 +2671,16 @@ dasd_eckd_build_format(struct dasd_device *base, int intensity = 0; int r0_perm; int nr_tracks; + int use_prefix; + + if (enable_pav) + startdev = dasd_alias_get_start_dev(base); - startdev = dasd_alias_get_start_dev(base); if (!startdev) startdev = base; - start_priv = (struct dasd_eckd_private *) startdev->private; - base_priv = (struct dasd_eckd_private *) base->private; + start_priv = startdev->private; + base_priv = base->private; rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); @@ -2104,28 +2703,46 @@ dasd_eckd_build_format(struct dasd_device *base, 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); - datasize = sizeof(struct PFX_eckd_data) + - sizeof(struct LO_eckd_data) + - rpt * nr_tracks * sizeof(struct eckd_count); + 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; - datasize = sizeof(struct PFX_eckd_data) + - sizeof(struct LO_eckd_data) + - sizeof(struct eckd_count) + - rpt * nr_tracks * sizeof(struct eckd_count); + 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; - datasize = sizeof(struct PFX_eckd_data) + - sizeof(struct LO_eckd_data) + - sizeof(struct eckd_count); + 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, @@ -2133,9 +2750,8 @@ dasd_eckd_build_format(struct dasd_device *base, fdata->intensity); return ERR_PTR(-EINVAL); } - /* Allocate the format ccw request. */ - fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, - datasize, startdev); + + fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); if (IS_ERR(fcp)) return fcp; @@ -2145,14 +2761,25 @@ dasd_eckd_build_format(struct dasd_device *base, switch (intensity & ~0x08) { case 0x00: /* Normal format. */ - 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); + 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, 0); + /* 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, @@ -2161,11 +2788,18 @@ dasd_eckd_build_format(struct dasd_device *base, data += sizeof(struct LO_eckd_data); break; case 0x01: /* Write record zero + format track. */ - 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); + 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, 0); + 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, @@ -2174,10 +2808,17 @@ dasd_eckd_build_format(struct dasd_device *base, data += sizeof(struct LO_eckd_data); break; case 0x04: /* Invalidate track. */ - 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); + 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, 0); + 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, @@ -2205,7 +2846,7 @@ dasd_eckd_build_format(struct dasd_device *base, ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; ccw->flags = CCW_FLAG_SLI; ccw->count = 8; - ccw->cda = (__u32)(addr_t) ect; + ccw->cda = virt_to_dma32(ect); ccw++; } if ((intensity & ~0x08) & 0x04) { /* erase track */ @@ -2220,7 +2861,7 @@ dasd_eckd_build_format(struct dasd_device *base, ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; ccw->flags = CCW_FLAG_SLI; ccw->count = 8; - ccw->cda = (__u32)(addr_t) ect; + ccw->cda = virt_to_dma32(ect); } else { /* write remaining records */ for (i = 0; i < rpt; i++) { ect = (struct eckd_count *) data; @@ -2235,14 +2876,14 @@ dasd_eckd_build_format(struct dasd_device *base, * when formatting CDL */ if ((intensity & 0x08) && - fdata->start_unit == 0) { + address.cyl == 0 && address.head == 0) { if (i < 3) { ect->kl = 4; ect->dl = sizes_trk0[i] - 4; } } if ((intensity & 0x08) && - fdata->start_unit == 1) { + address.cyl == 0 && address.head == 1) { ect->kl = 44; ect->dl = LABEL_SIZE - 44; } @@ -2255,14 +2896,15 @@ dasd_eckd_build_format(struct dasd_device *base, DASD_ECKD_CCW_WRITE_CKD_MT; ccw->flags = CCW_FLAG_SLI; ccw->count = 8; - ccw->cda = (__u32)(addr_t) ect; - ccw++; + ccw->cda = virt_to_dma32(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(); @@ -2271,22 +2913,39 @@ dasd_eckd_build_format(struct dasd_device *base, return fcp; } -static int -dasd_eckd_format_device(struct dasd_device *base, - struct format_data_t *fdata) +/* + * 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 *cqr, *n; - struct dasd_block *block; - struct dasd_eckd_private *private; - struct list_head format_queue; - struct dasd_device *device; - int old_stop, format_step; - int step, rc = 0; + struct dasd_ccw_req *ccw_req; - block = base->block; - private = (struct dasd_eckd_private *) base->private; + if (!fmt_buffer) { + ccw_req = dasd_eckd_build_format(base, NULL, 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; - /* Sanity checks. */ if (fdata->start_unit >= (private->real_cyl * private->rdc_data.trk_per_cyl)) { dev_warn(&base->cdev->dev, @@ -2313,68 +2972,570 @@ dasd_eckd_format_device(struct dasd_device *base, 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; - while (fdata->start_unit <= 1) { - fdata->stop_unit = fdata->start_unit; - cqr = dasd_eckd_build_format(base, fdata); - list_add(&cqr->blocklist, &format_queue); + 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; + } - fdata->stop_unit = old_stop; - fdata->start_unit++; + 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 (fdata->start_unit > fdata->stop_unit) - goto sleep; - } + 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; + } -retry: - format_step = 255 / recs_per_track(&private->rdc_data, 0, - fdata->blksize); - 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_build_format(base, fdata); - if (IS_ERR(cqr)) { - if (PTR_ERR(cqr) == -ENOMEM) { + 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) { /* - * not enough memory available - * go to out and start requests - * retry after first requests were finished + * Only get sense data if called by format + * check */ - fdata->stop_unit = old_stop; - goto sleep; - } else - return PTR_ERR(cqr); + if (fmt_buffer && irb) { + sense = dasd_get_sense(&cqr->irb); + memcpy(irb, &cqr->irb, sizeof(*irb)); + } + rc = -EIO; + } + list_del_init(&cqr->blocklist); + dasd_ffree_request(cqr, device); + private->count--; } - list_add(&cqr->blocklist, &format_queue); - fdata->start_unit = fdata->stop_unit + 1; - fdata->stop_unit = old_stop; + 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); +} + +static bool test_and_set_format_track(struct dasd_format_entry *to_format, + struct dasd_ccw_req *cqr) +{ + struct dasd_block *block = cqr->block; + struct dasd_format_entry *format; + unsigned long flags; + bool rc = false; + + spin_lock_irqsave(&block->format_lock, flags); + if (cqr->trkcount != atomic_read(&block->trkcount)) { + /* + * The number of formatted tracks has changed after request + * start and we can not tell if the current track was involved. + * To avoid data corruption treat it as if the current track is + * involved + */ + rc = true; + goto out; } + list_for_each_entry(format, &block->format_list, list) { + if (format->track == to_format->track) { + rc = true; + goto out; + } + } + list_add_tail(&to_format->list, &block->format_list); -sleep: - dasd_sleep_on_queue(&format_queue); +out: + spin_unlock_irqrestore(&block->format_lock, flags); + return rc; +} - list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { - device = cqr->startdev; - private = (struct dasd_eckd_private *) device->private; - if (cqr->status == DASD_CQR_FAILED) - rc = -EIO; - list_del_init(&cqr->blocklist); - dasd_sfree_request(cqr, device); - private->count--; +static void clear_format_track(struct dasd_format_entry *format, + struct dasd_block *block) +{ + unsigned long flags; + + spin_lock_irqsave(&block->format_lock, flags); + atomic_inc(&block->trkcount); + list_del_init(&format->list); + spin_unlock_irqrestore(&block->format_lock, flags); +} + +/* + * Callback function to free ESE format requests. + */ +static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) +{ + struct dasd_device *device = cqr->startdev; + struct dasd_eckd_private *private = device->private; + struct dasd_format_entry *format = data; + + clear_format_track(format, cqr->basedev->block); + private->count--; + dasd_ffree_request(cqr, device); +} + +static struct dasd_ccw_req * +dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr, + struct irb *irb) +{ + struct dasd_eckd_private *private; + struct dasd_format_entry *format; + struct format_data_t fdata; + unsigned int recs_per_trk; + struct dasd_ccw_req *fcqr; + struct dasd_device *base; + struct dasd_block *block; + unsigned int blksize; + struct request *req; + sector_t first_trk; + sector_t last_trk; + sector_t curr_trk; + int rc; + + req = dasd_get_callback_data(cqr); + block = cqr->block; + base = block->base; + private = base->private; + blksize = block->bp_block; + recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); + format = &startdev->format_entry; + + first_trk = blk_rq_pos(req) >> block->s2b_shift; + sector_div(first_trk, recs_per_trk); + last_trk = + (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; + sector_div(last_trk, recs_per_trk); + rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); + if (rc) + return ERR_PTR(rc); + + if (curr_trk < first_trk || curr_trk > last_trk) { + DBF_DEV_EVENT(DBF_WARNING, startdev, + "ESE error track %llu not within range %llu - %llu\n", + curr_trk, first_trk, last_trk); + return ERR_PTR(-EINVAL); + } + format->track = curr_trk; + /* test if track is already in formatting by another thread */ + if (test_and_set_format_track(format, cqr)) { + /* this is no real error so do not count down retries */ + cqr->retries++; + return ERR_PTR(-EEXIST); } + fdata.start_unit = curr_trk; + fdata.stop_unit = curr_trk; + fdata.blksize = blksize; + fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; + + rc = dasd_eckd_format_sanity_checks(base, &fdata); + if (rc) + return ERR_PTR(-EINVAL); + /* - * in case of ENOMEM we need to retry after - * first requests are finished + * We're building the request with PAV disabled as we're reusing + * the former startdev. */ - if (fdata->start_unit <= fdata->stop_unit) - goto retry; + fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); + if (IS_ERR(fcqr)) + return fcqr; + + fcqr->callback = dasd_eckd_ese_format_cb; + fcqr->callback_data = (void *) format; + + return fcqr; +} + +/* + * When data is read from an unformatted area of an ESE volume, this function + * returns zeroed data and thereby mimics a read of zero data. + * + * The first unformatted track is the one that got the NRF error, the address is + * encoded in the sense data. + * + * All tracks before have returned valid data and should not be touched. + * All tracks after the unformatted track might be formatted or not. This is + * currently not known, remember the processed data and return the remainder of + * the request to the blocklayer in __dasd_cleanup_cqr(). + */ +static int dasd_eckd_ese_read(struct dasd_ccw_req *cqr, struct irb *irb) +{ + struct dasd_eckd_private *private; + sector_t first_trk, last_trk; + sector_t first_blk, last_blk; + unsigned int blksize, off; + unsigned int recs_per_trk; + struct dasd_device *base; + struct req_iterator iter; + struct dasd_block *block; + unsigned int skip_block; + unsigned int blk_count; + struct request *req; + struct bio_vec bv; + sector_t curr_trk; + sector_t end_blk; + char *dst; + int rc; + + req = (struct request *) cqr->callback_data; + base = cqr->block->base; + blksize = base->block->bp_block; + block = cqr->block; + private = base->private; + skip_block = 0; + blk_count = 0; + + recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); + first_trk = first_blk = blk_rq_pos(req) >> block->s2b_shift; + sector_div(first_trk, recs_per_trk); + last_trk = last_blk = + (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; + sector_div(last_trk, recs_per_trk); + rc = dasd_eckd_track_from_irb(irb, base, &curr_trk); + if (rc) + return rc; + + /* sanity check if the current track from sense data is valid */ + if (curr_trk < first_trk || curr_trk > last_trk) { + DBF_DEV_EVENT(DBF_WARNING, base, + "ESE error track %llu not within range %llu - %llu\n", + curr_trk, first_trk, last_trk); + return -EINVAL; + } + + /* + * if not the first track got the NRF error we have to skip over valid + * blocks + */ + if (curr_trk != first_trk) + skip_block = curr_trk * recs_per_trk - first_blk; + + /* we have no information beyond the current track */ + end_blk = (curr_trk + 1) * recs_per_trk; + + rq_for_each_segment(bv, req, iter) { + dst = bvec_virt(&bv); + for (off = 0; off < bv.bv_len; off += blksize) { + if (first_blk + blk_count >= end_blk) { + cqr->proc_bytes = blk_count * blksize; + return 0; + } + if (dst && !skip_block) + memset(dst, 0, blksize); + else + skip_block--; + dst += blksize; + blk_count++; + } + } + return 0; +} + +/* + * 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; } @@ -2389,7 +3550,7 @@ static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) if (cqr->block && (cqr->startdev != cqr->block->base)) { dasd_eckd_reset_ccw_to_base_io(cqr); cqr->startdev = cqr->block->base; - cqr->lpm = cqr->block->base->path_data.opm; + cqr->lpm = dasd_path_get_opm(cqr->block->base); } }; @@ -2424,9 +3585,8 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device, { char mask; char *sense = NULL; - struct dasd_eckd_private *private; + struct dasd_eckd_private *private = device->private; - private = (struct dasd_eckd_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) { @@ -2438,14 +3598,6 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device, device->state == DASD_STATE_ONLINE && !test_bit(DASD_FLAG_OFFLINE, &device->flags) && !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { - /* - * the state change could be caused by an alias - * reassignment remove device from alias handling - * to prevent new requests from being scheduled on - * the wrong alias device - */ - dasd_alias_remove_device(device); - /* schedule worker to reload device */ dasd_reload_device(device); } @@ -2460,7 +3612,27 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device, /* summary unit check */ if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { - dasd_alias_handle_summary_unit_check(device, irb); + 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; } @@ -2486,6 +3658,296 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device, } } +static int dasd_eckd_ras_sanity_checks(struct dasd_device *device, + unsigned int first_trk, + unsigned int last_trk) +{ + struct dasd_eckd_private *private = device->private; + unsigned int trks_per_vol; + int rc = 0; + + trks_per_vol = private->real_cyl * private->rdc_data.trk_per_cyl; + + if (first_trk >= trks_per_vol) { + dev_warn(&device->cdev->dev, + "Start track number %u used in the space release command is too big\n", + first_trk); + rc = -EINVAL; + } else if (last_trk >= trks_per_vol) { + dev_warn(&device->cdev->dev, + "Stop track number %u used in the space release command is too big\n", + last_trk); + rc = -EINVAL; + } else if (first_trk > last_trk) { + dev_warn(&device->cdev->dev, + "Start track %u used in the space release command exceeds the end track\n", + first_trk); + rc = -EINVAL; + } + return rc; +} + +/* + * Helper function to count the amount of involved extents within a given range + * with extent alignment in mind. + */ +static int count_exts(unsigned int from, unsigned int to, int trks_per_ext) +{ + int cur_pos = 0; + int count = 0; + int tmp; + + if (from == to) + return 1; + + /* Count first partial extent */ + if (from % trks_per_ext != 0) { + tmp = from + trks_per_ext - (from % trks_per_ext) - 1; + if (tmp > to) + tmp = to; + cur_pos = tmp - from + 1; + count++; + } + /* Count full extents */ + if (to - (from + cur_pos) + 1 >= trks_per_ext) { + tmp = to - ((to - trks_per_ext + 1) % trks_per_ext); + count += (tmp - (from + cur_pos) + 1) / trks_per_ext; + cur_pos = tmp; + } + /* Count last partial extent */ + if (cur_pos < to) + count++; + + return count; +} + +static int dasd_in_copy_relation(struct dasd_device *device) +{ + struct dasd_pprc_data_sc4 *temp; + int rc; + + if (!dasd_eckd_pprc_enabled(device)) + return 0; + + temp = kzalloc(sizeof(*temp), GFP_KERNEL); + if (!temp) + return -ENOMEM; + + rc = dasd_eckd_query_pprc_status(device, temp); + if (!rc) + rc = temp->dev_info[0].state; + + kfree(temp); + return rc; +} + +/* + * Release allocated space for a given range or an entire volume. + */ +static struct dasd_ccw_req * +dasd_eckd_dso_ras(struct dasd_device *device, struct dasd_block *block, + struct request *req, unsigned int first_trk, + unsigned int last_trk, int by_extent) +{ + struct dasd_eckd_private *private = device->private; + struct dasd_dso_ras_ext_range *ras_range; + struct dasd_rssd_features *features; + struct dasd_dso_ras_data *ras_data; + u16 heads, beg_head, end_head; + int cur_to_trk, cur_from_trk; + struct dasd_ccw_req *cqr; + u32 beg_cyl, end_cyl; + int copy_relation; + struct ccw1 *ccw; + int trks_per_ext; + size_t ras_size; + size_t size; + int nr_exts; + void *rq; + int i; + + if (dasd_eckd_ras_sanity_checks(device, first_trk, last_trk)) + return ERR_PTR(-EINVAL); + + copy_relation = dasd_in_copy_relation(device); + if (copy_relation < 0) + return ERR_PTR(copy_relation); + + rq = req ? blk_mq_rq_to_pdu(req) : NULL; + + features = &private->features; + + trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; + nr_exts = 0; + if (by_extent) + nr_exts = count_exts(first_trk, last_trk, trks_per_ext); + ras_size = sizeof(*ras_data); + size = ras_size + (nr_exts * sizeof(*ras_range)); + + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, size, device, rq); + if (IS_ERR(cqr)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "Could not allocate RAS request"); + return cqr; + } + + ras_data = cqr->data; + memset(ras_data, 0, size); + + ras_data->order = DSO_ORDER_RAS; + ras_data->flags.vol_type = 0; /* CKD volume */ + /* Release specified extents or entire volume */ + ras_data->op_flags.by_extent = by_extent; + /* + * This bit guarantees initialisation of tracks within an extent that is + * not fully specified, but is only supported with a certain feature + * subset and for devices not in a copy relation. + */ + if (features->feature[56] & 0x01 && !copy_relation) + ras_data->op_flags.guarantee_init = 1; + + ras_data->lss = private->conf.ned->ID; + ras_data->dev_addr = private->conf.ned->unit_addr; + ras_data->nr_exts = nr_exts; + + if (by_extent) { + heads = private->rdc_data.trk_per_cyl; + cur_from_trk = first_trk; + cur_to_trk = first_trk + trks_per_ext - + (first_trk % trks_per_ext) - 1; + if (cur_to_trk > last_trk) + cur_to_trk = last_trk; + ras_range = (struct dasd_dso_ras_ext_range *)(cqr->data + ras_size); + + for (i = 0; i < nr_exts; i++) { + beg_cyl = cur_from_trk / heads; + beg_head = cur_from_trk % heads; + end_cyl = cur_to_trk / heads; + end_head = cur_to_trk % heads; + + set_ch_t(&ras_range->beg_ext, beg_cyl, beg_head); + set_ch_t(&ras_range->end_ext, end_cyl, end_head); + + cur_from_trk = cur_to_trk + 1; + cur_to_trk = cur_from_trk + trks_per_ext - 1; + if (cur_to_trk > last_trk) + cur_to_trk = last_trk; + ras_range++; + } + } + + ccw = cqr->cpaddr; + ccw->cda = virt_to_dma32(cqr->data); + ccw->cmd_code = DASD_ECKD_CCW_DSO; + ccw->count = size; + + cqr->startdev = device; + cqr->memdev = device; + cqr->block = block; + cqr->retries = 256; + cqr->expires = device->default_expires * HZ; + cqr->buildclk = get_tod_clock(); + cqr->status = DASD_CQR_FILLED; + + return cqr; +} + +static int dasd_eckd_release_space_full(struct dasd_device *device) +{ + struct dasd_ccw_req *cqr; + int rc; + + cqr = dasd_eckd_dso_ras(device, NULL, NULL, 0, 0, 0); + if (IS_ERR(cqr)) + return PTR_ERR(cqr); + + rc = dasd_sleep_on_interruptible(cqr); + + dasd_sfree_request(cqr, cqr->memdev); + + return rc; +} + +static int dasd_eckd_release_space_trks(struct dasd_device *device, + unsigned int from, unsigned int to) +{ + struct dasd_eckd_private *private = device->private; + struct dasd_block *block = device->block; + struct dasd_ccw_req *cqr, *n; + struct list_head ras_queue; + unsigned int device_exts; + int trks_per_ext; + int stop, step; + int cur_pos; + int rc = 0; + int retry; + + INIT_LIST_HEAD(&ras_queue); + + device_exts = private->real_cyl / dasd_eckd_ext_size(device); + trks_per_ext = dasd_eckd_ext_size(device) * private->rdc_data.trk_per_cyl; + + /* Make sure device limits are not exceeded */ + step = trks_per_ext * min(device_exts, DASD_ECKD_RAS_EXTS_MAX); + cur_pos = from; + + do { + retry = 0; + while (cur_pos < to) { + stop = cur_pos + step - + ((cur_pos + step) % trks_per_ext) - 1; + if (stop > to) + stop = to; + + cqr = dasd_eckd_dso_ras(device, NULL, NULL, cur_pos, stop, 1); + if (IS_ERR(cqr)) { + rc = PTR_ERR(cqr); + if (rc == -ENOMEM) { + if (list_empty(&ras_queue)) + goto out; + retry = 1; + break; + } + goto err_out; + } + + spin_lock_irq(&block->queue_lock); + list_add_tail(&cqr->blocklist, &ras_queue); + spin_unlock_irq(&block->queue_lock); + cur_pos = stop + 1; + } + + rc = dasd_sleep_on_queue_interruptible(&ras_queue); + +err_out: + list_for_each_entry_safe(cqr, n, &ras_queue, blocklist) { + device = cqr->startdev; + private = device->private; + + spin_lock_irq(&block->queue_lock); + list_del_init(&cqr->blocklist); + spin_unlock_irq(&block->queue_lock); + dasd_sfree_request(cqr, device); + private->count--; + } + } while (retry); + +out: + return rc; +} + +static int dasd_eckd_release_space(struct dasd_device *device, + struct format_data_t *rdata) +{ + if (rdata->intensity & DASD_FMT_INT_ESE_FULL) + return dasd_eckd_release_space_full(device); + else if (rdata->intensity == 0) + return dasd_eckd_release_space_trks(device, rdata->start_unit, + rdata->stop_unit); + else + return -EINVAL; +} + static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( struct dasd_device *startdev, struct dasd_block *block, @@ -2500,12 +3962,12 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( unsigned int blksize) { struct dasd_eckd_private *private; - unsigned long *idaws; + dma64_t *idaws; struct LO_eckd_data *LO_data; struct dasd_ccw_req *cqr; struct ccw1 *ccw; struct req_iterator iter; - struct bio_vec *bv; + struct bio_vec bv; char *dst; unsigned int off; int count, cidaw, cplength, datasize; @@ -2515,7 +3977,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( struct dasd_device *basedev; basedev = block->base; - private = (struct dasd_eckd_private *) basedev->private; + private = basedev->private; if (rq_data_dir(req) == READ) cmd = DASD_ECKD_CCW_READ_MT; else if (rq_data_dir(req) == WRITE) @@ -2527,14 +3989,12 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( count = 0; cidaw = 0; rq_for_each_segment(bv, req, iter) { - if (bv->bv_len & (blksize - 1)) + 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 defined(CONFIG_64BIT) - if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) - cidaw += bv->bv_len >> (block->s2b_shift + 9); -#endif + 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) @@ -2566,7 +4026,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( } /* Allocate the ccw request. */ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, - startdev); + startdev, blk_mq_rq_to_pdu(req)); if (IS_ERR(cqr)) return cqr; ccw = cqr->cpaddr; @@ -2580,19 +4040,17 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( dasd_sfree_request(cqr, startdev); return ERR_PTR(-EAGAIN); } - idaws = (unsigned long *) (cqr->data + - sizeof(struct PFX_eckd_data)); + idaws = (dma64_t *)(cqr->data + sizeof(struct PFX_eckd_data)); } else { if (define_extent(ccw++, cqr->data, first_trk, - last_trk, cmd, basedev) == -EAGAIN) { + last_trk, cmd, basedev, 0) == -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)); + idaws = (dma64_t *)(cqr->data + sizeof(struct DE_eckd_data)); } /* Build locate_record+read/write/ccws. */ LO_data = (struct LO_eckd_data *) (idaws + cidaw); @@ -2604,16 +4062,16 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( last_rec - recid + 1, cmd, basedev, blksize); } rq_for_each_segment(bv, req, iter) { - dst = page_address(bv->bv_page) + bv->bv_offset; + dst = bvec_virt(&bv); 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); + memcpy(copy + bv.bv_offset, dst, bv.bv_len); if (copy) - dst = copy + bv->bv_offset; + dst = copy + bv.bv_offset; } - for (off = 0; off < bv->bv_len; off += blksize) { + for (off = 0; off < bv.bv_len; off += blksize) { sector_t trkid = recid; unsigned int recoffs = sector_div(trkid, blk_per_trk); rcmd = cmd; @@ -2646,11 +4104,11 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( ccw->cmd_code = rcmd; ccw->count = count; if (idal_is_needed(dst, blksize)) { - ccw->cda = (__u32)(addr_t) idaws; + ccw->cda = virt_to_dma32(idaws); ccw->flags = CCW_FLAG_IDA; idaws = idal_create_words(idaws, dst, blksize); } else { - ccw->cda = (__u32)(addr_t) dst; + ccw->cda = virt_to_dma32(dst); ccw->flags = 0; } ccw++; @@ -2665,10 +4123,16 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( cqr->memdev = startdev; cqr->block = block; cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ - cqr->lpm = startdev->path_data.ppm; + cqr->lpm = dasd_path_get_ppm(startdev); cqr->retries = startdev->default_retries; cqr->buildclk = get_tod_clock(); cqr->status = DASD_CQR_FILLED; + + /* Set flags to suppress output for expected errors */ + if (dasd_eckd_is_ese(basedev)) { + set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); + } + return cqr; } @@ -2685,11 +4149,11 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( unsigned int blk_per_trk, unsigned int blksize) { - unsigned long *idaws; + dma64_t *idaws; struct dasd_ccw_req *cqr; struct ccw1 *ccw; struct req_iterator iter; - struct bio_vec *bv; + struct bio_vec bv; char *dst, *idaw_dst; unsigned int cidaw, cplength, datasize; unsigned int tlf; @@ -2721,15 +4185,11 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( /* 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); + datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); /* Allocate the ccw request. */ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, - startdev); + startdev, blk_mq_rq_to_pdu(req)); if (IS_ERR(cqr)) return cqr; ccw = cqr->cpaddr; @@ -2759,7 +4219,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( * (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)); + idaws = (dma64_t *)(cqr->data + sizeof(struct PFX_eckd_data)); recid = first_rec; new_track = 1; end_idaw = 0; @@ -2767,8 +4227,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 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; + dst = bvec_virt(&bv); + seg_len = bv.bv_len; while (seg_len) { if (new_track) { trkid = recid; @@ -2780,7 +4240,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( ccw[-1].flags |= CCW_FLAG_CC; ccw->cmd_code = cmd; ccw->count = len_to_track_end; - ccw->cda = (__u32)(addr_t)idaws; + ccw->cda = virt_to_dma32(idaws); ccw->flags = CCW_FLAG_IDA; ccw++; recid += count; @@ -2796,7 +4256,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( * idaw ends */ if (!idaw_dst) { - if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { + if ((unsigned long)(dst) & (IDA_BLOCK_SIZE - 1)) { dasd_sfree_request(cqr, startdev); return ERR_PTR(-ERANGE); } else @@ -2816,7 +4276,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( * 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))) + if (!((unsigned long)(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) { @@ -2840,10 +4300,15 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( cqr->memdev = startdev; cqr->block = block; cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ - cqr->lpm = startdev->path_data.ppm; + cqr->lpm = dasd_path_get_ppm(startdev); cqr->retries = startdev->default_retries; cqr->buildclk = get_tod_clock(); cqr->status = DASD_CQR_FILLED; + + /* Set flags to suppress output for expected errors */ + if (dasd_eckd_is_ese(basedev)) + set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); + return cqr; } @@ -2873,22 +4338,24 @@ static int prepare_itcw(struct itcw *itcw, /* setup prefix data */ - basepriv = (struct dasd_eckd_private *) basedev->private; - startpriv = (struct dasd_eckd_private *) startdev->private; + 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.base_address = basepriv->conf.ned->unit_addr; + pfxdata.base_lss = basepriv->conf.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) { + if (startpriv->uid.type == UA_BASE_PAV_ALIAS) + pfxdata.validity.verify_base = 1; + + if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { pfxdata.validity.verify_base = 1; - if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) - pfxdata.validity.hyper_pav = 1; + pfxdata.validity.hyper_pav = 1; } switch (cmd) { @@ -2906,14 +4373,31 @@ static int prepare_itcw(struct itcw *itcw, dedata->mask.perm = 0x02; dedata->attributes.operation = basepriv->attrib.operation; dedata->blk_size = blksize; - rc = check_XRC_on_prefix(&pfxdata, basedev); + rc = set_timestamp(NULL, dedata, basedev); dedata->ga_extended |= 0x42; lredata->operation.orientation = 0x0; lredata->operation.operation = 0x3F; lredata->extended_operation = 0x23; lredata->auxiliary.check_bytes = 0x2; + /* + * If XRC is supported the System Time Stamp is set. The + * validity of the time stamp must be reflected in the prefix + * data as well. + */ + if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) + pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 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); @@ -2961,13 +4445,19 @@ static int prepare_itcw(struct itcw *itcw, } } - lredata->auxiliary.length_valid = 1; - lredata->auxiliary.length_scope = 1; + 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; - lredata->sector = sector; set_ch_t(&lredata->seek_addr, begcyl, beghead); lredata->search_arg.cyl = lredata->seek_addr.cyl; lredata->search_arg.head = lredata->seek_addr.head; @@ -2975,7 +4465,7 @@ static int prepare_itcw(struct itcw *itcw, dcw = itcw_add_dcw(itcw, pfx_cmd, 0, &pfxdata, sizeof(pfxdata), total_data_size); - return PTR_RET(dcw); + return PTR_ERR_OR_ZERO(dcw); } static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( @@ -2993,7 +4483,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( { struct dasd_ccw_req *cqr; struct req_iterator iter; - struct bio_vec *bv; + struct bio_vec bv; char *dst; unsigned int trkcount, ctidaw; unsigned char cmd; @@ -3037,7 +4527,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( /* Allocate the ccw request. */ itcw_size = itcw_calc_size(0, ctidaw, 0); - cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, + blk_mq_rq_to_pdu(req)); if (IS_ERR(cqr)) return cqr; @@ -3069,9 +4560,9 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 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. + * We can let the block layer handle this by setting seg_boundary_mask + * to page boundaries and 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. */ @@ -3079,8 +4570,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 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; + dst = bvec_virt(&bv); + seg_len = bv.bv_len; while (seg_len) { if (new_track) { trkid = recid; @@ -3112,9 +4603,9 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( } } else { rq_for_each_segment(bv, req, iter) { - dst = page_address(bv->bv_page) + bv->bv_offset; + dst = bvec_virt(&bv); last_tidaw = itcw_add_tidaw(itcw, 0x00, - dst, bv->bv_len); + dst, bv.bv_len); if (IS_ERR(last_tidaw)) { ret = -EINVAL; goto out_error; @@ -3133,10 +4624,17 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( cqr->memdev = startdev; cqr->block = block; cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ - cqr->lpm = startdev->path_data.ppm; + cqr->lpm = dasd_path_get_ppm(startdev); cqr->retries = startdev->default_retries; cqr->buildclk = get_tod_clock(); cqr->status = DASD_CQR_FILLED; + + /* Set flags to suppress output for expected errors */ + if (dasd_eckd_is_ese(basedev)) { + set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); + set_bit(DASD_CQR_SUPPRESS_IT, &cqr->flags); + } + return cqr; out_error: dasd_sfree_request(cqr, startdev); @@ -3161,7 +4659,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, struct dasd_ccw_req *cqr; basedev = block->base; - private = (struct dasd_eckd_private *) basedev->private; + private = basedev->private; /* Calculate number of blocks/records per track. */ blksize = block->bp_block; @@ -3178,6 +4676,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 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; @@ -3221,53 +4721,58 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, return cqr; } -static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, - struct dasd_block *block, - struct request *req) +static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, + struct dasd_block *block, + struct request *req) { - unsigned long *idaws; + sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; + unsigned int seg_len, len_to_track_end; + unsigned int cidaw, cplength, datasize; + sector_t first_trk, last_trk, sectors; + struct dasd_eckd_private *base_priv; struct dasd_device *basedev; + struct req_iterator iter; struct dasd_ccw_req *cqr; + unsigned int trkcount; + unsigned int size; + unsigned char cmd; + struct bio_vec bv; struct ccw1 *ccw; - struct req_iterator iter; - struct bio_vec *bv; + dma64_t *idaws; + int use_prefix; + void *data; 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; - 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. */ - if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { - cqr = ERR_PTR(-EINVAL); - goto out; - } - if (((blk_rq_pos(req) + blk_rq_sectors(req)) % - DASD_RAW_SECTORS_PER_TRACK) != 0) { - cqr = ERR_PTR(-EINVAL); - goto out; + 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 (%llu,%llu) req %p", + start_padding_sectors, end_padding_sectors, req); + return ERR_PTR(-EINVAL); } 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; - basedev = block->base; 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; - } + else + return ERR_PTR(-EINVAL); /* * Raw track based I/O needs IDAWs for each page, @@ -3275,44 +4780,66 @@ static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, */ 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 + * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes + * of extended parameter. This is needed for write full track. */ - pfx_datasize = sizeof(struct PFX_eckd_data) + 8; + base_priv = basedev->private; + use_prefix = base_priv->features.feature[8] & 0x01; + if (use_prefix) { + cplength = 1 + trkcount; + size = sizeof(struct PFX_eckd_data) + 2; + } else { + cplength = 2 + trkcount; + size = sizeof(struct DE_eckd_data) + + sizeof(struct LRE_eckd_data) + 2; + } + size = ALIGN(size, 8); - datasize = pfx_datasize + cidaw * sizeof(unsigned long long); + datasize = size + cidaw * sizeof(unsigned long); /* Allocate the ccw request. */ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, - datasize, startdev); + datasize, startdev, blk_mq_rq_to_pdu(req)); if (IS_ERR(cqr)) - goto out; + return cqr; + ccw = cqr->cpaddr; + data = cqr->data; - 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; - } + if (use_prefix) { + prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, + startdev, 1, 0, trkcount, 0, 0); + } else { + define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); + ccw[-1].flags |= CCW_FLAG_CC; - idaws = (unsigned long *)(cqr->data + pfx_datasize); + data += sizeof(struct DE_eckd_data); + locate_record_ext(ccw++, data, first_trk, 0, + trkcount, cmd, basedev, 0, 0); + } + idaws = (dma64_t *)(cqr->data + size); 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 = virt_to_dma32(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; + dst = bvec_virt(&bv); + 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; @@ -3320,7 +4847,7 @@ static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, ccw->count = 57326; /* 64k map to one track */ len_to_track_end = 65536; - ccw->cda = (__u32)(addr_t)idaws; + ccw->cda = virt_to_dma32(idaws); ccw->flags |= CCW_FLAG_IDA; ccw->flags |= CCW_FLAG_SLI; ccw++; @@ -3328,7 +4855,8 @@ static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 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); @@ -3336,14 +4864,11 @@ static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, cqr->memdev = startdev; cqr->block = block; cqr->expires = startdev->default_expires * HZ; - cqr->lpm = startdev->path_data.ppm; + 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; } @@ -3354,7 +4879,7 @@ 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; + struct bio_vec bv; char *dst, *cda; unsigned int blksize, blk_per_trk, off; sector_t recid; @@ -3362,7 +4887,7 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) if (!dasd_page_cache) goto out; - private = (struct dasd_eckd_private *) cqr->block->base->private; + 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; @@ -3372,19 +4897,19 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 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) { + dst = bvec_virt(&bv); + 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)); + cda = dma64_to_virt(*((dma64_t *)dma32_to_virt(ccw->cda))); else - cda = (char *)((addr_t) ccw->cda); + cda = dma32_to_virt(ccw->cda); if (dst != cda) { if (rq_data_dir(req) == READ) - memcpy(dst, cda, bv->bv_len); + memcpy(dst, cda, bv.bv_len); kmem_cache_free(dasd_page_cache, (void *)((addr_t)cda & PAGE_MASK)); } @@ -3446,14 +4971,14 @@ static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, startdev = dasd_alias_get_start_dev(base); if (!startdev) startdev = base; - private = (struct dasd_eckd_private *) startdev->private; + 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); + cqr = dasd_eckd_build_cp_raw(startdev, block, req); else cqr = dasd_eckd_build_cp(startdev, block, req); if (IS_ERR(cqr)) @@ -3469,7 +4994,7 @@ static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, unsigned long flags; spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); - private = (struct dasd_eckd_private *) cqr->memdev->private; + private = cqr->memdev->private; private->count--; spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); return dasd_eckd_free_cp(cqr, req); @@ -3479,18 +5004,17 @@ static int dasd_eckd_fill_info(struct dasd_device * device, struct dasd_information2_t * info) { - struct dasd_eckd_private *private; + struct dasd_eckd_private *private = device->private; - private = (struct dasd_eckd_private *) device->private; info->label_block = 2; info->FBA_layout = private->uses_cdl ? 0 : 1; info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; - info->characteristics_size = sizeof(struct dasd_eckd_characteristics); + info->characteristics_size = sizeof(private->rdc_data); memcpy(info->characteristics, &private->rdc_data, - sizeof(struct dasd_eckd_characteristics)); - info->confdata_size = min((unsigned long)private->conf_len, - sizeof(info->configuration_data)); - memcpy(info->configuration_data, private->conf_data, + sizeof(private->rdc_data)); + info->confdata_size = min_t(unsigned long, private->conf.len, + sizeof(info->configuration_data)); + memcpy(info->configuration_data, private->conf.data, info->confdata_size); return 0; } @@ -3516,7 +5040,7 @@ dasd_eckd_release(struct dasd_device *device) return -EACCES; useglobal = 0; - cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); if (IS_ERR(cqr)) { mutex_lock(&dasd_reserve_mutex); useglobal = 1; @@ -3532,7 +5056,7 @@ dasd_eckd_release(struct dasd_device *device) ccw->cmd_code = DASD_ECKD_CCW_RELEASE; ccw->flags |= CCW_FLAG_SLI; ccw->count = 32; - ccw->cda = (__u32)(addr_t) cqr->data; + ccw->cda = virt_to_dma32(cqr->data); cqr->startdev = device; cqr->memdev = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); @@ -3571,7 +5095,7 @@ dasd_eckd_reserve(struct dasd_device *device) return -EACCES; useglobal = 0; - cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); if (IS_ERR(cqr)) { mutex_lock(&dasd_reserve_mutex); useglobal = 1; @@ -3587,7 +5111,7 @@ dasd_eckd_reserve(struct dasd_device *device) ccw->cmd_code = DASD_ECKD_CCW_RESERVE; ccw->flags |= CCW_FLAG_SLI; ccw->count = 32; - ccw->cda = (__u32)(addr_t) cqr->data; + ccw->cda = virt_to_dma32(cqr->data); cqr->startdev = device; cqr->memdev = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); @@ -3625,7 +5149,7 @@ dasd_eckd_steal_lock(struct dasd_device *device) return -EACCES; useglobal = 0; - cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); if (IS_ERR(cqr)) { mutex_lock(&dasd_reserve_mutex); useglobal = 1; @@ -3641,7 +5165,7 @@ dasd_eckd_steal_lock(struct dasd_device *device) ccw->cmd_code = DASD_ECKD_CCW_SLCK; ccw->flags |= CCW_FLAG_SLI; ccw->count = 32; - ccw->cda = (__u32)(addr_t) cqr->data; + ccw->cda = virt_to_dma32(cqr->data); cqr->startdev = device; cqr->memdev = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); @@ -3685,7 +5209,8 @@ static int dasd_eckd_snid(struct dasd_device *device, useglobal = 0; cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, - sizeof(struct dasd_snid_data), device); + sizeof(struct dasd_snid_data), device, + NULL); if (IS_ERR(cqr)) { mutex_lock(&dasd_reserve_mutex); useglobal = 1; @@ -3701,7 +5226,7 @@ static int dasd_eckd_snid(struct dasd_device *device, ccw->cmd_code = DASD_ECKD_CCW_SNID; ccw->flags |= CCW_FLAG_SLI; ccw->count = 12; - ccw->cda = (__u32)(addr_t) cqr->data; + ccw->cda = virt_to_dma32(cqr->data); cqr->startdev = device; cqr->memdev = device; clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); @@ -3745,7 +5270,7 @@ dasd_eckd_performance(struct dasd_device *device, void __user *argp) 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); + device, NULL); if (IS_ERR(cqr)) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Could not allocate initialization request"); @@ -3768,7 +5293,7 @@ dasd_eckd_performance(struct dasd_device *device, void __user *argp) 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; + ccw->cda = virt_to_dma32(prssdp); /* Read Subsystem Data - Performance Statistics */ stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); @@ -3777,7 +5302,7 @@ dasd_eckd_performance(struct dasd_device *device, void __user *argp) ccw++; ccw->cmd_code = DASD_ECKD_CCW_RSSD; ccw->count = sizeof(struct dasd_rssd_perf_stats_t); - ccw->cda = (__u32)(addr_t) stats; + ccw->cda = virt_to_dma32(stats); cqr->buildclk = get_tod_clock(); cqr->status = DASD_CQR_FILLED; @@ -3800,8 +5325,7 @@ dasd_eckd_performance(struct dasd_device *device, void __user *argp) static int dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) { - struct dasd_eckd_private *private = - (struct dasd_eckd_private *)device->private; + struct dasd_eckd_private *private = device->private; struct attrib_data_t attrib = private->attrib; int rc; @@ -3825,8 +5349,7 @@ dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) static int dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) { - struct dasd_eckd_private *private = - (struct dasd_eckd_private *)device->private; + struct dasd_eckd_private *private = device->private; struct attrib_data_t attrib; if (!capable(CAP_SYS_ADMIN)) @@ -3865,15 +5388,13 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp) rc = -EFAULT; if (copy_from_user(&usrparm, argp, sizeof(usrparm))) goto out; - if (is_compat_task() || sizeof(long) == 4) { - /* Make sure pointers are sane even on 31 bit. */ + /* at least 2 bytes are accessed and should be allocated */ + if (usrparm.psf_data_len < 2) { + DBF_DEV_EVENT(DBF_WARNING, device, + "Symmetrix ioctl invalid data length %d", + usrparm.psf_data_len); 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; + goto out; } /* alloc I/O data area */ psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); @@ -3893,7 +5414,7 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp) psf1 = psf_data[1]; /* setup CCWs for PSF + RSSD */ - cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); if (IS_ERR(cqr)) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Could not allocate initialization request"); @@ -3915,7 +5436,7 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp) 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->cda = virt_to_dma32(psf_data); ccw++; @@ -3923,7 +5444,7 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp) 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; + ccw->cda = virt_to_dma32(rssd_result); rc = dasd_sleep_on(cqr); if (rc) @@ -3978,34 +5499,39 @@ dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) * 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) +static void +dasd_eckd_dump_ccw_range(struct dasd_device *device, 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:", + len += sprintf(page + len, "CCW %px: %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); + datap = dma64_to_virt(*((dma64_t *)dma32_to_virt(from->cda))); else - datap = (char *) ((addr_t) from->cda); + datap = dma32_to_virt(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, " "); + /* dump data (max 128 bytes) */ + for (count = 0; count < from->count && count < 128; count++) { + if (count % 32 == 0) + len += sprintf(page + len, "\n"); + 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; + if (len > 0) + dev_err(&device->cdev->dev, "%s", page); } static void @@ -4036,9 +5562,12 @@ dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 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; + struct device *dev; int len, sl, sct; + char *page; + + dev = &device->cdev->dev; page = (char *) get_zeroed_page(GFP_ATOMIC); if (page == NULL) { @@ -4047,24 +5576,18 @@ static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 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", + len = sprintf(page, "I/O status report:\n"); + len += sprintf(page + len, + "in req: %px 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); + len += sprintf(page + len, "Failing CCW: %px\n", + dma32_to_virt(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:", + len += sprintf(page + len, "Sense(hex) %2d-%2d:", (8 * sl), ((8 * sl) + 7)); for (sct = 0; sct < 8; sct++) { @@ -4076,58 +5599,50 @@ static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 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", + sprintf(page + len, + "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", + sprintf(page + len, + "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"); + sprintf(page + len, "SORRY - NO VALID SENSE AVAILABLE\n"); } - printk(KERN_ERR "%s", page); + dev_err(dev, "%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) */ + /* Count CCW and print first CCWs (maximum 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); + dev_err(dev, "Related CP in req: %px\n", req); + dasd_eckd_dump_ccw_range(device, first, to, 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 */ + fail = dma32_to_virt(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"); + dev_err(dev, "......\n"); } to = min(fail + 1, last); - len += dasd_eckd_dump_ccw_range(from, to, page + len); + dasd_eckd_dump_ccw_range(device, from, to, page + len); /* print last CCWs (maximum 2) */ + len = 0; from = max(from, ++to); if (from < last - 1) { from = last - 1; /* there is a gap - print header */ - len += sprintf(page + len, PRINTK_HEADER "......\n"); + dev_err(dev, "......\n"); } - len += dasd_eckd_dump_ccw_range(from, last, page + len); - if (len > 0) - printk(KERN_ERR "%s", page); + dasd_eckd_dump_ccw_range(device, from, last, page + len); } free_page((unsigned long) page); } @@ -4151,70 +5666,56 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 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 " + len = sprintf(page, "I/O status report:\n"); + len += sprintf(page + len, + "in req: %px 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.schxs, + 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); + len += sprintf(page + len, "Failing TCW: %px\n", + dma32_to_virt(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); + tsb = tcw_get_tsb(dma32_to_virt(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); + len += sprintf(page + len, "tsb->length %d\n", tsb->length); + len += sprintf(page + len, "tsb->flags %x\n", tsb->flags); + len += sprintf(page + len, "tsb->dcw_offset %d\n", tsb->dcw_offset); + len += sprintf(page + len, "tsb->count %d\n", tsb->count); residual = tsb->count - 28; - len += sprintf(page + len, PRINTK_HEADER - " residual %d\n", residual); + len += sprintf(page + len, "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", + len += sprintf(page + len, "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", + len += sprintf(page + len, "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", + len += sprintf(page + len, "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", + len += sprintf(page + len, "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", + len += sprintf(page + len, "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); + len += sprintf(page + len, "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: ", + len += sprintf(page + len, + "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", + len += sprintf(page + len, "%02x", rcq[8 * sl + sct]); } len += sprintf(page + len, "\n"); @@ -4222,15 +5723,15 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, sense = tsb->tsa.ddpc.sense; break; case 3: /* tsa_intrg */ - len += sprintf(page + len, PRINTK_HEADER - " tsb->tsa.intrg.: not supportet yet\n"); + len += sprintf(page + len, + "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:", + len += sprintf(page + len, + "Sense(hex) %2d-%2d:", (8 * sl), ((8 * sl) + 7)); for (sct = 0; sct < 8; sct++) { len += sprintf(page + len, " %02x", @@ -4241,166 +5742,1101 @@ static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 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", + sprintf(page + len, + "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", + sprintf(page + len, + "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"); + sprintf(page + len, "SORRY - NO VALID SENSE AVAILABLE\n"); } } else { - sprintf(page + len, PRINTK_HEADER - " SORRY - NO TSB DATA AVAILABLE\n"); + sprintf(page + len, "SORRY - NO TSB DATA AVAILABLE\n"); } - printk(KERN_ERR "%s", page); + dev_err(&device->cdev->dev, "%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); + + /* + * In some cases certain errors might be expected and + * log messages shouldn't be written then. + * Check if the according suppress bit is set. + */ + if (sense && (sense[1] & SNS1_INV_TRACK_FORMAT) && + !(sense[2] & SNS2_ENV_DATA_PRESENT) && + test_bit(DASD_CQR_SUPPRESS_IT, &req->flags)) + return; + + 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; + + if (scsw_cstat(&irb->scsw) == 0x40 && + test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) + return; + if (scsw_is_tm(&irb->scsw)) dasd_eckd_dump_sense_tcw(device, req, irb); else dasd_eckd_dump_sense_ccw(device, req, irb); } -static int dasd_eckd_pm_freeze(struct dasd_device *device) +static int dasd_eckd_reload_device(struct dasd_device *device) { + struct dasd_eckd_private *private = device->private; + char print_uid[DASD_UID_STRLEN]; + int rc, old_base; + struct dasd_uid uid; + unsigned long flags; + /* - * 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 + * remove device from alias handling to prevent new requests + * from being scheduled on the wrong alias device */ dasd_alias_remove_device(device); - dasd_alias_disconnect_device_from_lcu(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; + + dasd_eckd_read_fc_security(device); + + 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) { + dasd_eckd_get_uid_string(&private->conf, print_uid); + 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_restore_device(struct dasd_device *device) +static int dasd_eckd_read_message_buffer(struct dasd_device *device, + struct dasd_rssd_messages *messages, + __u8 lpum) { - struct dasd_eckd_private *private; - struct dasd_eckd_characteristics temp_rdc_data; + struct dasd_rssd_messages *message_buf; + struct dasd_psf_prssd_data *prssdp; + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; int rc; - struct dasd_uid temp_uid; - unsigned long flags; - unsigned long cqr_flags = 0; - private = (struct dasd_eckd_private *) device->private; + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, + (sizeof(struct dasd_psf_prssd_data) + + sizeof(struct dasd_rssd_messages)), + device, NULL); + if (IS_ERR(cqr)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "Could not allocate read message buffer request"); + return PTR_ERR(cqr); + } - /* Read Configuration Data */ - dasd_eckd_read_conf(device); + 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; - 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; + /* 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 */ - /* register lcu with alias handling, enable PAV if this is a new lcu */ - rc = dasd_alias_make_device_known_to_lcu(device); - if (rc) + 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 = virt_to_dma32(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 = virt_to_dma32(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, NULL); + 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->conf.ned->ID; + prssdp->volume = private->conf.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 = virt_to_dma32(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 = virt_to_dma32(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; + } - set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); - dasd_eckd_validate_server(device, cqr_flags); + 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++; + } - /* RE-Read Configuration Data */ - dasd_eckd_read_conf(device); + kfree(access); + return count; +} - /* Read Feature Codes */ - dasd_eckd_read_features(device); +/* + * 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; - /* Read Device Characteristics */ - rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, - &temp_rdc_data, 64); + 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) { - DBF_EVENT_DEVID(DBF_WARNING, device->cdev, - "Read device characteristic failed, rc=%d", rc); - goto out_err; + kfree(access); + return rc; } - 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); + 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_printf(m, "pgid %*phN\n", 11, entry->pgid); + /* 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; +} -out_err: - return -1; +static struct dasd_device +*copy_relation_find_device(struct dasd_copy_relation *copy, + char *busid) +{ + int i; + + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].configured && + strncmp(copy->entry[i].busid, busid, DASD_BUS_ID_SIZE) == 0) + return copy->entry[i].device; + } + return NULL; } -static int dasd_eckd_reload_device(struct dasd_device *device) +/* + * set the new active/primary device + */ +static void copy_pair_set_active(struct dasd_copy_relation *copy, char *new_busid, + char *old_busid) { - struct dasd_eckd_private *private; - int rc, old_base; - char print_uid[60]; - struct dasd_uid uid; - unsigned long flags; + int i; - private = (struct dasd_eckd_private *) device->private; + for (i = 0; i < DASD_CP_ENTRIES; i++) { + if (copy->entry[i].configured && + strncmp(copy->entry[i].busid, new_busid, + DASD_BUS_ID_SIZE) == 0) { + copy->active = ©->entry[i]; + copy->entry[i].primary = true; + } else if (copy->entry[i].configured && + strncmp(copy->entry[i].busid, old_busid, + DASD_BUS_ID_SIZE) == 0) { + copy->entry[i].primary = false; + } + } +} - 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); +/* + * The function will swap the role of a given copy pair. + * During the swap operation the relation of the blockdevice is disconnected + * from the old primary and connected to the new. + * + * IO is paused on the block queue before swap and may be resumed afterwards. + */ +static int dasd_eckd_copy_pair_swap(struct dasd_device *device, char *prim_busid, + char *sec_busid) +{ + struct dasd_device *primary, *secondary; + struct dasd_copy_relation *copy; + struct dasd_block *block; + struct gendisk *gdp; + int rc; - /* Read Configuration Data */ - rc = dasd_eckd_read_conf(device); - if (rc) - goto out_err; + copy = device->copy; + if (!copy) + return DASD_COPYPAIRSWAP_INVALID; + primary = copy->active->device; + if (!primary) + return DASD_COPYPAIRSWAP_INVALID; + /* double check if swap has correct primary */ + if (strncmp(dev_name(&primary->cdev->dev), prim_busid, DASD_BUS_ID_SIZE) != 0) + return DASD_COPYPAIRSWAP_PRIMARY; + + secondary = copy_relation_find_device(copy, sec_busid); + if (!secondary) + return DASD_COPYPAIRSWAP_SECONDARY; - rc = dasd_eckd_generate_uid(device); - if (rc) - goto out_err; /* - * update unit address configuration and - * add device to alias management + * usually the device should be quiesced for swap + * for paranoia stop device and requeue requests again */ - dasd_alias_update_add_device(device); + dasd_device_set_stop_bits(primary, DASD_STOPPED_PPRC); + dasd_device_set_stop_bits(secondary, DASD_STOPPED_PPRC); + dasd_generic_requeue_all_requests(primary); + + /* swap DASD internal device <> block assignment */ + block = primary->block; + primary->block = NULL; + secondary->block = block; + block->base = secondary; + /* set new primary device in COPY relation */ + copy_pair_set_active(copy, sec_busid, prim_busid); + + /* swap blocklayer device link */ + gdp = block->gdp; + dasd_add_link_to_gendisk(gdp, secondary); + rc = device_move(disk_to_dev(gdp), &secondary->cdev->dev, DPM_ORDER_NONE); + if (rc) { + dev_err(&primary->cdev->dev, + "copy_pair_swap: moving blockdevice parent %s->%s failed (%d)\n", + dev_name(&primary->cdev->dev), + dev_name(&secondary->cdev->dev), rc); + } - dasd_eckd_get_uid(device, &uid); + /* re-enable device */ + dasd_device_remove_stop_bits(primary, DASD_STOPPED_PPRC); + dasd_device_remove_stop_bits(secondary, DASD_STOPPED_PPRC); + dasd_schedule_device_bh(secondary); - 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); + return DASD_COPYPAIRSWAP_SUCCESS; +} + +/* + * Perform Subsystem Function - Peer-to-Peer Remote Copy Extended Query + */ +static int dasd_eckd_query_pprc_status(struct dasd_device *device, + struct dasd_pprc_data_sc4 *data) +{ + struct dasd_pprc_data_sc4 *pprc_data; + 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(*prssdp) + sizeof(*pprc_data) + 1, + device, NULL); + if (IS_ERR(cqr)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "Could not allocate query PPRC status 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 = PSF_SUBORDER_PPRCEQ; + prssdp->varies[0] = PPRCEQ_SCOPE_4; + pprc_data = (struct dasd_pprc_data_sc4 *)(prssdp + 1); + + 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 = virt_to_dma32(prssdp); + + /* Read Subsystem Data - query host access */ + ccw++; + ccw->cmd_code = DASD_ECKD_CCW_RSSD; + ccw->count = sizeof(*pprc_data); + ccw->flags |= CCW_FLAG_SLI; + ccw->cda = virt_to_dma32(pprc_data); + + cqr->buildclk = get_tod_clock(); + cqr->status = DASD_CQR_FILLED; + + rc = dasd_sleep_on_interruptible(cqr); + if (rc == 0) { + *data = *pprc_data; + } else { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "PPRC Extended Query failed with rc=%d\n", + rc); + rc = -EOPNOTSUPP; + } + + dasd_sfree_request(cqr, cqr->memdev); + return rc; +} + +/* + * ECKD NOP - no operation + */ +static int dasd_eckd_nop(struct dasd_device *device) +{ + struct dasd_ccw_req *cqr; + struct ccw1 *ccw; + int rc; + + cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 1, device, NULL); + if (IS_ERR(cqr)) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", + "Could not allocate NOP request"); + return PTR_ERR(cqr); + } + cqr->startdev = device; + cqr->memdev = device; + cqr->block = NULL; + cqr->retries = 1; + cqr->expires = 10 * HZ; + + ccw = cqr->cpaddr; + ccw->cmd_code = DASD_ECKD_CCW_NOP; + ccw->flags |= CCW_FLAG_SLI; + + cqr->buildclk = get_tod_clock(); + cqr->status = DASD_CQR_FILLED; + + rc = dasd_sleep_on_interruptible(cqr); + if (rc != 0) { + DBF_EVENT_DEVID(DBF_WARNING, device->cdev, + "NOP failed with rc=%d\n", rc); + rc = -EOPNOTSUPP; + } + dasd_sfree_request(cqr, cqr->memdev); + return rc; +} + +static int dasd_eckd_device_ping(struct dasd_device *device) +{ + return dasd_eckd_nop(device); +} + +/* + * 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, NULL); + + 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 = virt_to_dma32(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 - snprintf(print_uid, sizeof(print_uid), - "%s.%s.%04x.%02x", uid.vendor, uid.serial, - uid.ssid, uid.base_unit_addr); + 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_oos_resume(struct dasd_device *device) +{ + struct dasd_eckd_private *private = device->private; + struct alias_pav_group *pavgroup, *tempgroup; + struct dasd_device *dev, *n; + unsigned long flags; + + spin_lock_irqsave(&private->lcu->lock, flags); + list_for_each_entry_safe(dev, n, &private->lcu->active_devices, + alias_list) { + if (dev->stopped & DASD_STOPPED_NOSPC) + dasd_generic_space_avail(dev); + } + list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, + alias_list) { + if (dev->stopped & DASD_STOPPED_NOSPC) + dasd_generic_space_avail(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) { + if (dev->stopped & DASD_STOPPED_NOSPC) + dasd_generic_space_avail(dev); + } + list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, + alias_list) { + if (dev->stopped & DASD_STOPPED_NOSPC) + dasd_generic_space_avail(dev); + } + } + spin_unlock_irqrestore(&private->lcu->lock, flags); +} + +static void dasd_eckd_handle_oos(struct dasd_device *device, void *messages, + __u8 lpum) +{ + struct dasd_oos_message *oos = messages; + + switch (oos->code) { + case REPO_WARN: + case POOL_WARN: + dev_warn(&device->cdev->dev, + "Extent pool usage has reached a critical value\n"); + dasd_eckd_oos_resume(device); + break; + case REPO_EXHAUST: + case POOL_EXHAUST: + dev_warn(&device->cdev->dev, + "Extent pool is exhausted\n"); + break; + case REPO_RELIEVE: + case POOL_RELIEVE: dev_info(&device->cdev->dev, - "An Alias device was reassigned to a new base device " - "with UID: %s\n", print_uid); + "Extent pool physical space constraint has been relieved\n"); + break; } + + /* In any case, update related data */ + dasd_eckd_read_ext_pool_info(device); + + /* 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); + if (messages->length == ATTENTION_LENGTH_OOS && + messages->format == ATTENTION_FORMAT_OOS) + dasd_eckd_handle_oos(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; +} -out_err: - return -1; +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 unsigned int dasd_eckd_max_sectors(struct dasd_block *block) +{ + if (block->base->features & DASD_FEATURE_USERAW) { + /* + * the max_blocks value for raw_track access is 256 + * it is higher than the native ECKD value because we + * only need one ccw per track + * so the max_hw_sectors are + * 2048 x 512B = 1024kB = 16 tracks + */ + return DASD_ECKD_MAX_BLOCKS_RAW << block->s2b_shift; + } + + return DASD_ECKD_MAX_BLOCKS << block->s2b_shift; } static struct ccw_driver dasd_eckd_driver = { .driver = { .name = "dasd-eckd", .owner = THIS_MODULE, + .dev_groups = dasd_dev_groups, }, .ids = dasd_eckd_ids, .probe = dasd_eckd_probe, @@ -4410,43 +6846,28 @@ static struct ccw_driver dasd_eckd_driver = { .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, + .pe_handler = dasd_eckd_pe_handler, .basic_to_ready = dasd_eckd_basic_to_ready, .online_to_ready = dasd_eckd_online_to_ready, - .ready_to_basic = dasd_eckd_ready_to_basic, + .basic_to_known = dasd_eckd_basic_to_known, + .max_sectors = dasd_eckd_max_sectors, .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, @@ -4456,11 +6877,33 @@ static struct dasd_discipline dasd_eckd_discipline = { .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, + .is_ese = dasd_eckd_is_ese, + .space_allocated = dasd_eckd_space_allocated, + .space_configured = dasd_eckd_space_configured, + .logical_capacity = dasd_eckd_logical_capacity, + .release_space = dasd_eckd_release_space, + .ext_pool_id = dasd_eckd_ext_pool_id, + .ext_size = dasd_eckd_ext_size, + .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, + .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, + .ext_pool_oos = dasd_eckd_ext_pool_oos, + .ext_pool_exhaust = dasd_eckd_ext_pool_exhaust, + .ese_format = dasd_eckd_ese_format, + .ese_read = dasd_eckd_ese_read, + .pprc_status = dasd_eckd_query_pprc_status, + .pprc_enabled = dasd_eckd_pprc_enabled, + .copy_pair_swap = dasd_eckd_copy_pair_swap, + .device_ping = dasd_eckd_device_ping, }; static int __init @@ -4473,18 +6916,34 @@ dasd_eckd_init(void) 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) { + dasd_vol_info_req = kmalloc(sizeof(*dasd_vol_info_req), + GFP_KERNEL | GFP_DMA); + if (!dasd_vol_info_req) { + kfree(dasd_reserve_req); + return -ENOMEM; + } + pe_handler_worker = kmalloc(sizeof(*pe_handler_worker), + GFP_KERNEL | GFP_DMA); + if (!pe_handler_worker) { + kfree(dasd_reserve_req); + kfree(dasd_vol_info_req); + return -ENOMEM; + } + rawpadpage = (void *)__get_free_page(GFP_KERNEL); + if (!rawpadpage) { + kfree(pe_handler_worker); kfree(dasd_reserve_req); + kfree(dasd_vol_info_req); return -ENOMEM; } ret = ccw_driver_register(&dasd_eckd_driver); if (!ret) wait_for_device_probe(); else { - kfree(path_verification_worker); + kfree(pe_handler_worker); kfree(dasd_reserve_req); + kfree(dasd_vol_info_req); + free_page((unsigned long)rawpadpage); } return ret; } @@ -4493,8 +6952,9 @@ static void __exit dasd_eckd_cleanup(void) { ccw_driver_unregister(&dasd_eckd_driver); - kfree(path_verification_worker); + kfree(pe_handler_worker); kfree(dasd_reserve_req); + free_page((unsigned long)rawpadpage); } module_init(dasd_eckd_init); |