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android_kernel_motorola_sm6225/drivers/s390/block/dasd_eckd.c
Horst Hummel 3d05259542 [PATCH] s390: dasd device identifiers 
Generate new sysfs-attribute 'uid' that contains an device specific unique
identifier.  This can be used to identity multiple ALIASES of the same
physical device (PAV).  In addition the sysfs-attributes 'vendor' (containing
the manufacturer of the device) and 'alias' (identify alias or base device) is
added.  This is first part of PAV support in LPAR (also valid on zVM).

Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-04-28 08:33:48 -07:00

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