![Heiko Carstens](/assets/img/avatar_default.png)
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
625 lines
17 KiB
C
625 lines
17 KiB
C
/*
|
|
* File...........: linux/drivers/s390/block/dasd_diag.c
|
|
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
|
|
* Based on.......: linux/drivers/s390/block/mdisk.c
|
|
* ...............: by Hartmunt Penner <hpenner@de.ibm.com>
|
|
* Bugreports.to..: <Linux390@de.ibm.com>
|
|
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
|
|
*
|
|
*/
|
|
|
|
#include <linux/stddef.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/hdreg.h>
|
|
#include <linux/bio.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/jiffies.h>
|
|
|
|
#include <asm/dasd.h>
|
|
#include <asm/debug.h>
|
|
#include <asm/ebcdic.h>
|
|
#include <asm/io.h>
|
|
#include <asm/s390_ext.h>
|
|
#include <asm/todclk.h>
|
|
#include <asm/vtoc.h>
|
|
|
|
#include "dasd_int.h"
|
|
#include "dasd_diag.h"
|
|
|
|
#define PRINTK_HEADER "dasd(diag):"
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* The maximum number of blocks per request (max_blocks) is dependent on the
|
|
* amount of storage that is available in the static I/O buffer for each
|
|
* device. Currently each device gets 2 pages. We want to fit two requests
|
|
* into the available memory so that we can immediately start the next if one
|
|
* finishes. */
|
|
#define DIAG_MAX_BLOCKS (((2 * PAGE_SIZE - sizeof(struct dasd_ccw_req) - \
|
|
sizeof(struct dasd_diag_req)) / \
|
|
sizeof(struct dasd_diag_bio)) / 2)
|
|
#define DIAG_MAX_RETRIES 32
|
|
#define DIAG_TIMEOUT 50 * HZ
|
|
|
|
struct dasd_discipline dasd_diag_discipline;
|
|
|
|
struct dasd_diag_private {
|
|
struct dasd_diag_characteristics rdc_data;
|
|
struct dasd_diag_rw_io iob;
|
|
struct dasd_diag_init_io iib;
|
|
blocknum_t pt_block;
|
|
};
|
|
|
|
struct dasd_diag_req {
|
|
unsigned int block_count;
|
|
struct dasd_diag_bio bio[0];
|
|
};
|
|
|
|
static const u8 DASD_DIAG_CMS1[] = { 0xc3, 0xd4, 0xe2, 0xf1 };/* EBCDIC CMS1 */
|
|
|
|
/* Perform DIAG250 call with block I/O parameter list iob (input and output)
|
|
* and function code cmd.
|
|
* In case of an exception return 3. Otherwise return result of bitwise OR of
|
|
* resulting condition code and DIAG return code. */
|
|
static inline int dia250(void *iob, int cmd)
|
|
{
|
|
register unsigned long reg0 asm ("0") = (unsigned long) iob;
|
|
typedef union {
|
|
struct dasd_diag_init_io init_io;
|
|
struct dasd_diag_rw_io rw_io;
|
|
} addr_type;
|
|
int rc;
|
|
|
|
rc = 3;
|
|
asm volatile(
|
|
" diag 0,%2,0x250\n"
|
|
"0: ipm %0\n"
|
|
" srl %0,28\n"
|
|
" or %0,1\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "+d" (rc), "=m" (*(addr_type *) iob)
|
|
: "d" (cmd), "d" (reg0), "m" (*(addr_type *) iob)
|
|
: "1", "cc");
|
|
return rc;
|
|
}
|
|
|
|
/* Initialize block I/O to DIAG device using the specified blocksize and
|
|
* block offset. On success, return zero and set end_block to contain the
|
|
* number of blocks on the device minus the specified offset. Return non-zero
|
|
* otherwise. */
|
|
static __inline__ int
|
|
mdsk_init_io(struct dasd_device *device, unsigned int blocksize,
|
|
blocknum_t offset, blocknum_t *end_block)
|
|
{
|
|
struct dasd_diag_private *private;
|
|
struct dasd_diag_init_io *iib;
|
|
int rc;
|
|
|
|
private = (struct dasd_diag_private *) device->private;
|
|
iib = &private->iib;
|
|
memset(iib, 0, sizeof (struct dasd_diag_init_io));
|
|
|
|
iib->dev_nr = _ccw_device_get_device_number(device->cdev);
|
|
iib->block_size = blocksize;
|
|
iib->offset = offset;
|
|
iib->flaga = DASD_DIAG_FLAGA_DEFAULT;
|
|
|
|
rc = dia250(iib, INIT_BIO);
|
|
|
|
if ((rc & 3) == 0 && end_block)
|
|
*end_block = iib->end_block;
|
|
|
|
return rc;
|
|
}
|
|
|
|
/* Remove block I/O environment for device. Return zero on success, non-zero
|
|
* otherwise. */
|
|
static __inline__ int
|
|
mdsk_term_io(struct dasd_device * device)
|
|
{
|
|
struct dasd_diag_private *private;
|
|
struct dasd_diag_init_io *iib;
|
|
int rc;
|
|
|
|
private = (struct dasd_diag_private *) device->private;
|
|
iib = &private->iib;
|
|
memset(iib, 0, sizeof (struct dasd_diag_init_io));
|
|
iib->dev_nr = _ccw_device_get_device_number(device->cdev);
|
|
rc = dia250(iib, TERM_BIO);
|
|
return rc;
|
|
}
|
|
|
|
/* Error recovery for failed DIAG requests - try to reestablish the DIAG
|
|
* environment. */
|
|
static void
|
|
dasd_diag_erp(struct dasd_device *device)
|
|
{
|
|
int rc;
|
|
|
|
mdsk_term_io(device);
|
|
rc = mdsk_init_io(device, device->bp_block, 0, NULL);
|
|
if (rc)
|
|
DEV_MESSAGE(KERN_WARNING, device, "DIAG ERP unsuccessful, "
|
|
"rc=%d", rc);
|
|
}
|
|
|
|
/* Start a given request at the device. Return zero on success, non-zero
|
|
* otherwise. */
|
|
static int
|
|
dasd_start_diag(struct dasd_ccw_req * cqr)
|
|
{
|
|
struct dasd_device *device;
|
|
struct dasd_diag_private *private;
|
|
struct dasd_diag_req *dreq;
|
|
int rc;
|
|
|
|
device = cqr->device;
|
|
if (cqr->retries < 0) {
|
|
DEV_MESSAGE(KERN_WARNING, device, "DIAG start_IO: request %p "
|
|
"- no retry left)", cqr);
|
|
cqr->status = DASD_CQR_FAILED;
|
|
return -EIO;
|
|
}
|
|
private = (struct dasd_diag_private *) device->private;
|
|
dreq = (struct dasd_diag_req *) cqr->data;
|
|
|
|
private->iob.dev_nr = _ccw_device_get_device_number(device->cdev);
|
|
private->iob.key = 0;
|
|
private->iob.flags = DASD_DIAG_RWFLAG_ASYNC;
|
|
private->iob.block_count = dreq->block_count;
|
|
private->iob.interrupt_params = (addr_t) cqr;
|
|
private->iob.bio_list = dreq->bio;
|
|
private->iob.flaga = DASD_DIAG_FLAGA_DEFAULT;
|
|
|
|
cqr->startclk = get_clock();
|
|
cqr->starttime = jiffies;
|
|
cqr->retries--;
|
|
|
|
rc = dia250(&private->iob, RW_BIO);
|
|
switch (rc) {
|
|
case 0: /* Synchronous I/O finished successfully */
|
|
cqr->stopclk = get_clock();
|
|
cqr->status = DASD_CQR_DONE;
|
|
/* Indicate to calling function that only a dasd_schedule_bh()
|
|
and no timer is needed */
|
|
rc = -EACCES;
|
|
break;
|
|
case 8: /* Asynchronous I/O was started */
|
|
cqr->status = DASD_CQR_IN_IO;
|
|
rc = 0;
|
|
break;
|
|
default: /* Error condition */
|
|
cqr->status = DASD_CQR_QUEUED;
|
|
DEV_MESSAGE(KERN_WARNING, device, "dia250 returned rc=%d", rc);
|
|
dasd_diag_erp(device);
|
|
rc = -EIO;
|
|
break;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/* Terminate given request at the device. */
|
|
static int
|
|
dasd_diag_term_IO(struct dasd_ccw_req * cqr)
|
|
{
|
|
struct dasd_device *device;
|
|
|
|
device = cqr->device;
|
|
mdsk_term_io(device);
|
|
mdsk_init_io(device, device->bp_block, 0, NULL);
|
|
cqr->status = DASD_CQR_CLEAR;
|
|
cqr->stopclk = get_clock();
|
|
dasd_schedule_bh(device);
|
|
return 0;
|
|
}
|
|
|
|
/* Handle external interruption. */
|
|
static void
|
|
dasd_ext_handler(__u16 code)
|
|
{
|
|
struct dasd_ccw_req *cqr, *next;
|
|
struct dasd_device *device;
|
|
unsigned long long expires;
|
|
unsigned long flags;
|
|
u8 int_code, status;
|
|
addr_t ip;
|
|
int rc;
|
|
|
|
int_code = *((u8 *) DASD_DIAG_LC_INT_CODE);
|
|
status = *((u8 *) DASD_DIAG_LC_INT_STATUS);
|
|
switch (int_code) {
|
|
case DASD_DIAG_CODE_31BIT:
|
|
ip = (addr_t) *((u32 *) DASD_DIAG_LC_INT_PARM_31BIT);
|
|
break;
|
|
case DASD_DIAG_CODE_64BIT:
|
|
ip = (addr_t) *((u64 *) DASD_DIAG_LC_INT_PARM_64BIT);
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
if (!ip) { /* no intparm: unsolicited interrupt */
|
|
MESSAGE(KERN_DEBUG, "%s", "caught unsolicited interrupt");
|
|
return;
|
|
}
|
|
cqr = (struct dasd_ccw_req *) ip;
|
|
device = (struct dasd_device *) cqr->device;
|
|
if (strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
|
|
DEV_MESSAGE(KERN_WARNING, device,
|
|
" magic number of dasd_ccw_req 0x%08X doesn't"
|
|
" match discipline 0x%08X",
|
|
cqr->magic, *(int *) (&device->discipline->name));
|
|
return;
|
|
}
|
|
|
|
/* get irq lock to modify request queue */
|
|
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
|
|
|
|
/* Check for a pending clear operation */
|
|
if (cqr->status == DASD_CQR_CLEAR) {
|
|
cqr->status = DASD_CQR_QUEUED;
|
|
dasd_clear_timer(device);
|
|
dasd_schedule_bh(device);
|
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
|
|
return;
|
|
}
|
|
|
|
cqr->stopclk = get_clock();
|
|
|
|
expires = 0;
|
|
if (status == 0) {
|
|
cqr->status = DASD_CQR_DONE;
|
|
/* Start first request on queue if possible -> fast_io. */
|
|
if (!list_empty(&device->ccw_queue)) {
|
|
next = list_entry(device->ccw_queue.next,
|
|
struct dasd_ccw_req, list);
|
|
if (next->status == DASD_CQR_QUEUED) {
|
|
rc = dasd_start_diag(next);
|
|
if (rc == 0)
|
|
expires = next->expires;
|
|
else if (rc != -EACCES)
|
|
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
|
"Interrupt fastpath "
|
|
"failed!");
|
|
}
|
|
}
|
|
} else {
|
|
cqr->status = DASD_CQR_QUEUED;
|
|
DEV_MESSAGE(KERN_WARNING, device, "interrupt status for "
|
|
"request %p was %d (%d retries left)", cqr, status,
|
|
cqr->retries);
|
|
dasd_diag_erp(device);
|
|
}
|
|
|
|
if (expires != 0)
|
|
dasd_set_timer(device, expires);
|
|
else
|
|
dasd_clear_timer(device);
|
|
dasd_schedule_bh(device);
|
|
|
|
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
|
|
}
|
|
|
|
/* Check whether device can be controlled by DIAG discipline. Return zero on
|
|
* success, non-zero otherwise. */
|
|
static int
|
|
dasd_diag_check_device(struct dasd_device *device)
|
|
{
|
|
struct dasd_diag_private *private;
|
|
struct dasd_diag_characteristics *rdc_data;
|
|
struct dasd_diag_bio bio;
|
|
struct vtoc_cms_label *label;
|
|
blocknum_t end_block;
|
|
unsigned int sb, bsize;
|
|
int rc;
|
|
|
|
private = (struct dasd_diag_private *) device->private;
|
|
if (private == NULL) {
|
|
private = kzalloc(sizeof(struct dasd_diag_private),GFP_KERNEL);
|
|
if (private == NULL) {
|
|
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
|
"memory allocation failed for private data");
|
|
return -ENOMEM;
|
|
}
|
|
device->private = (void *) private;
|
|
}
|
|
/* Read Device Characteristics */
|
|
rdc_data = (void *) &(private->rdc_data);
|
|
rdc_data->dev_nr = _ccw_device_get_device_number(device->cdev);
|
|
rdc_data->rdc_len = sizeof (struct dasd_diag_characteristics);
|
|
|
|
rc = diag210((struct diag210 *) rdc_data);
|
|
if (rc) {
|
|
DEV_MESSAGE(KERN_WARNING, device, "failed to retrieve device "
|
|
"information (rc=%d)", rc);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
/* Figure out position of label block */
|
|
switch (private->rdc_data.vdev_class) {
|
|
case DEV_CLASS_FBA:
|
|
private->pt_block = 1;
|
|
break;
|
|
case DEV_CLASS_ECKD:
|
|
private->pt_block = 2;
|
|
break;
|
|
default:
|
|
DEV_MESSAGE(KERN_WARNING, device, "unsupported device class "
|
|
"(class=%d)", private->rdc_data.vdev_class);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
DBF_DEV_EVENT(DBF_INFO, device,
|
|
"%04X: %04X on real %04X/%02X",
|
|
rdc_data->dev_nr,
|
|
rdc_data->vdev_type,
|
|
rdc_data->rdev_type, rdc_data->rdev_model);
|
|
|
|
/* terminate all outstanding operations */
|
|
mdsk_term_io(device);
|
|
|
|
/* figure out blocksize of device */
|
|
label = (struct vtoc_cms_label *) get_zeroed_page(GFP_KERNEL);
|
|
if (label == NULL) {
|
|
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
|
"No memory to allocate initialization request");
|
|
return -ENOMEM;
|
|
}
|
|
rc = 0;
|
|
end_block = 0;
|
|
/* try all sizes - needed for ECKD devices */
|
|
for (bsize = 512; bsize <= PAGE_SIZE; bsize <<= 1) {
|
|
mdsk_init_io(device, bsize, 0, &end_block);
|
|
memset(&bio, 0, sizeof (struct dasd_diag_bio));
|
|
bio.type = MDSK_READ_REQ;
|
|
bio.block_number = private->pt_block + 1;
|
|
bio.buffer = label;
|
|
memset(&private->iob, 0, sizeof (struct dasd_diag_rw_io));
|
|
private->iob.dev_nr = rdc_data->dev_nr;
|
|
private->iob.key = 0;
|
|
private->iob.flags = 0; /* do synchronous io */
|
|
private->iob.block_count = 1;
|
|
private->iob.interrupt_params = 0;
|
|
private->iob.bio_list = &bio;
|
|
private->iob.flaga = DASD_DIAG_FLAGA_DEFAULT;
|
|
rc = dia250(&private->iob, RW_BIO);
|
|
if (rc == 3) {
|
|
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
|
"DIAG call failed");
|
|
rc = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
mdsk_term_io(device);
|
|
if (rc == 0)
|
|
break;
|
|
}
|
|
if (bsize > PAGE_SIZE) {
|
|
DEV_MESSAGE(KERN_WARNING, device, "device access failed "
|
|
"(rc=%d)", rc);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
/* check for label block */
|
|
if (memcmp(label->label_id, DASD_DIAG_CMS1,
|
|
sizeof(DASD_DIAG_CMS1)) == 0) {
|
|
/* get formatted blocksize from label block */
|
|
bsize = (unsigned int) label->block_size;
|
|
device->blocks = (unsigned long) label->block_count;
|
|
} else
|
|
device->blocks = end_block;
|
|
device->bp_block = bsize;
|
|
device->s2b_shift = 0; /* bits to shift 512 to get a block */
|
|
for (sb = 512; sb < bsize; sb = sb << 1)
|
|
device->s2b_shift++;
|
|
rc = mdsk_init_io(device, device->bp_block, 0, NULL);
|
|
if (rc) {
|
|
DEV_MESSAGE(KERN_WARNING, device, "DIAG initialization "
|
|
"failed (rc=%d)", rc);
|
|
rc = -EIO;
|
|
} else {
|
|
DEV_MESSAGE(KERN_INFO, device,
|
|
"(%ld B/blk): %ldkB",
|
|
(unsigned long) device->bp_block,
|
|
(unsigned long) (device->blocks <<
|
|
device->s2b_shift) >> 1);
|
|
}
|
|
out:
|
|
free_page((long) label);
|
|
return rc;
|
|
}
|
|
|
|
/* Fill in virtual disk geometry for device. Return zero on success, non-zero
|
|
* otherwise. */
|
|
static int
|
|
dasd_diag_fill_geometry(struct dasd_device *device, struct hd_geometry *geo)
|
|
{
|
|
if (dasd_check_blocksize(device->bp_block) != 0)
|
|
return -EINVAL;
|
|
geo->cylinders = (device->blocks << device->s2b_shift) >> 10;
|
|
geo->heads = 16;
|
|
geo->sectors = 128 >> device->s2b_shift;
|
|
return 0;
|
|
}
|
|
|
|
static dasd_era_t
|
|
dasd_diag_examine_error(struct dasd_ccw_req * cqr, struct irb * stat)
|
|
{
|
|
return dasd_era_fatal;
|
|
}
|
|
|
|
static dasd_erp_fn_t
|
|
dasd_diag_erp_action(struct dasd_ccw_req * cqr)
|
|
{
|
|
return dasd_default_erp_action;
|
|
}
|
|
|
|
static dasd_erp_fn_t
|
|
dasd_diag_erp_postaction(struct dasd_ccw_req * cqr)
|
|
{
|
|
return dasd_default_erp_postaction;
|
|
}
|
|
|
|
/* Create DASD request from block device request. Return pointer to new
|
|
* request on success, ERR_PTR otherwise. */
|
|
static struct dasd_ccw_req *
|
|
dasd_diag_build_cp(struct dasd_device * device, struct request *req)
|
|
{
|
|
struct dasd_ccw_req *cqr;
|
|
struct dasd_diag_req *dreq;
|
|
struct dasd_diag_bio *dbio;
|
|
struct bio *bio;
|
|
struct bio_vec *bv;
|
|
char *dst;
|
|
unsigned int count, datasize;
|
|
sector_t recid, first_rec, last_rec;
|
|
unsigned int blksize, off;
|
|
unsigned char rw_cmd;
|
|
int i;
|
|
|
|
if (rq_data_dir(req) == READ)
|
|
rw_cmd = MDSK_READ_REQ;
|
|
else if (rq_data_dir(req) == WRITE)
|
|
rw_cmd = MDSK_WRITE_REQ;
|
|
else
|
|
return ERR_PTR(-EINVAL);
|
|
blksize = device->bp_block;
|
|
/* Calculate record id of first and last block. */
|
|
first_rec = req->sector >> device->s2b_shift;
|
|
last_rec = (req->sector + req->nr_sectors - 1) >> device->s2b_shift;
|
|
/* Check struct bio and count the number of blocks for the request. */
|
|
count = 0;
|
|
rq_for_each_bio(bio, req) {
|
|
bio_for_each_segment(bv, bio, i) {
|
|
if (bv->bv_len & (blksize - 1))
|
|
/* Fba can only do full blocks. */
|
|
return ERR_PTR(-EINVAL);
|
|
count += bv->bv_len >> (device->s2b_shift + 9);
|
|
}
|
|
}
|
|
/* Paranoia. */
|
|
if (count != last_rec - first_rec + 1)
|
|
return ERR_PTR(-EINVAL);
|
|
/* Build the request */
|
|
datasize = sizeof(struct dasd_diag_req) +
|
|
count*sizeof(struct dasd_diag_bio);
|
|
cqr = dasd_smalloc_request(dasd_diag_discipline.name, 0,
|
|
datasize, device);
|
|
if (IS_ERR(cqr))
|
|
return cqr;
|
|
|
|
dreq = (struct dasd_diag_req *) cqr->data;
|
|
dreq->block_count = count;
|
|
dbio = dreq->bio;
|
|
recid = first_rec;
|
|
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) {
|
|
memset(dbio, 0, sizeof (struct dasd_diag_bio));
|
|
dbio->type = rw_cmd;
|
|
dbio->block_number = recid + 1;
|
|
dbio->buffer = dst;
|
|
dbio++;
|
|
dst += blksize;
|
|
recid++;
|
|
}
|
|
}
|
|
}
|
|
cqr->retries = DIAG_MAX_RETRIES;
|
|
cqr->buildclk = get_clock();
|
|
if (req->cmd_flags & REQ_FAILFAST)
|
|
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
|
|
cqr->device = device;
|
|
cqr->expires = DIAG_TIMEOUT;
|
|
cqr->status = DASD_CQR_FILLED;
|
|
return cqr;
|
|
}
|
|
|
|
/* Release DASD request. Return non-zero if request was successful, zero
|
|
* otherwise. */
|
|
static int
|
|
dasd_diag_free_cp(struct dasd_ccw_req *cqr, struct request *req)
|
|
{
|
|
int status;
|
|
|
|
status = cqr->status == DASD_CQR_DONE;
|
|
dasd_sfree_request(cqr, cqr->device);
|
|
return status;
|
|
}
|
|
|
|
/* Fill in IOCTL data for device. */
|
|
static int
|
|
dasd_diag_fill_info(struct dasd_device * device,
|
|
struct dasd_information2_t * info)
|
|
{
|
|
struct dasd_diag_private *private;
|
|
|
|
private = (struct dasd_diag_private *) device->private;
|
|
info->label_block = (unsigned int) private->pt_block;
|
|
info->FBA_layout = 1;
|
|
info->format = DASD_FORMAT_LDL;
|
|
info->characteristics_size = sizeof (struct dasd_diag_characteristics);
|
|
memcpy(info->characteristics,
|
|
&((struct dasd_diag_private *) device->private)->rdc_data,
|
|
sizeof (struct dasd_diag_characteristics));
|
|
info->confdata_size = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
dasd_diag_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
|
|
struct irb *stat)
|
|
{
|
|
DEV_MESSAGE(KERN_ERR, device, "%s",
|
|
"dump sense not available for DIAG data");
|
|
}
|
|
|
|
struct dasd_discipline dasd_diag_discipline = {
|
|
.owner = THIS_MODULE,
|
|
.name = "DIAG",
|
|
.ebcname = "DIAG",
|
|
.max_blocks = DIAG_MAX_BLOCKS,
|
|
.check_device = dasd_diag_check_device,
|
|
.fill_geometry = dasd_diag_fill_geometry,
|
|
.start_IO = dasd_start_diag,
|
|
.term_IO = dasd_diag_term_IO,
|
|
.examine_error = dasd_diag_examine_error,
|
|
.erp_action = dasd_diag_erp_action,
|
|
.erp_postaction = dasd_diag_erp_postaction,
|
|
.build_cp = dasd_diag_build_cp,
|
|
.free_cp = dasd_diag_free_cp,
|
|
.dump_sense = dasd_diag_dump_sense,
|
|
.fill_info = dasd_diag_fill_info,
|
|
};
|
|
|
|
static int __init
|
|
dasd_diag_init(void)
|
|
{
|
|
if (!MACHINE_IS_VM) {
|
|
MESSAGE_LOG(KERN_INFO,
|
|
"Machine is not VM: %s "
|
|
"discipline not initializing",
|
|
dasd_diag_discipline.name);
|
|
return -ENODEV;
|
|
}
|
|
ASCEBC(dasd_diag_discipline.ebcname, 4);
|
|
|
|
ctl_set_bit(0, 9);
|
|
register_external_interrupt(0x2603, dasd_ext_handler);
|
|
dasd_diag_discipline_pointer = &dasd_diag_discipline;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit
|
|
dasd_diag_cleanup(void)
|
|
{
|
|
unregister_external_interrupt(0x2603, dasd_ext_handler);
|
|
ctl_clear_bit(0, 9);
|
|
dasd_diag_discipline_pointer = NULL;
|
|
}
|
|
|
|
module_init(dasd_diag_init);
|
|
module_exit(dasd_diag_cleanup);
|