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path: root/drivers/s390/block/dasd.c
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Diffstat (limited to 'drivers/s390/block/dasd.c')
-rw-r--r--drivers/s390/block/dasd.c295
1 files changed, 164 insertions, 131 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index bd591499414..2fd64e5a9ab 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -9,6 +9,9 @@
*
*/
+#define KMSG_COMPONENT "dasd"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
#include <linux/kmod.h>
#include <linux/init.h>
#include <linux/interrupt.h>
@@ -22,6 +25,7 @@
#include <asm/ebcdic.h>
#include <asm/idals.h>
#include <asm/todclk.h>
+#include <asm/itcw.h>
/* This is ugly... */
#define PRINTK_HEADER "dasd:"
@@ -57,6 +61,8 @@ static void dasd_device_tasklet(struct dasd_device *);
static void dasd_block_tasklet(struct dasd_block *);
static void do_kick_device(struct work_struct *);
static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *);
+static void dasd_device_timeout(unsigned long);
+static void dasd_block_timeout(unsigned long);
/*
* SECTION: Operations on the device structure.
@@ -99,6 +105,8 @@ struct dasd_device *dasd_alloc_device(void)
(unsigned long) device);
INIT_LIST_HEAD(&device->ccw_queue);
init_timer(&device->timer);
+ device->timer.function = dasd_device_timeout;
+ device->timer.data = (unsigned long) device;
INIT_WORK(&device->kick_work, do_kick_device);
device->state = DASD_STATE_NEW;
device->target = DASD_STATE_NEW;
@@ -138,6 +146,8 @@ struct dasd_block *dasd_alloc_block(void)
INIT_LIST_HEAD(&block->ccw_queue);
spin_lock_init(&block->queue_lock);
init_timer(&block->timer);
+ block->timer.function = dasd_block_timeout;
+ block->timer.data = (unsigned long) block;
return block;
}
@@ -215,7 +225,7 @@ static int dasd_state_known_to_basic(struct dasd_device *device)
return rc;
}
/* register 'device' debug area, used for all DBF_DEV_XXX calls */
- device->debug_area = debug_register(dev_name(&device->cdev->dev), 1, 1,
+ device->debug_area = debug_register(dev_name(&device->cdev->dev), 4, 1,
8 * sizeof(long));
debug_register_view(device->debug_area, &debug_sprintf_view);
debug_set_level(device->debug_area, DBF_WARNING);
@@ -756,7 +766,7 @@ static inline int dasd_check_cqr(struct dasd_ccw_req *cqr)
return -EINVAL;
device = cqr->startdev;
if (strncmp((char *) &cqr->magic, device->discipline->ebcname, 4)) {
- DEV_MESSAGE(KERN_WARNING, device,
+ DBF_DEV_EVENT(DBF_WARNING, device,
" dasd_ccw_req 0x%08x magic doesn't match"
" discipline 0x%08x",
cqr->magic,
@@ -776,6 +786,7 @@ int dasd_term_IO(struct dasd_ccw_req *cqr)
{
struct dasd_device *device;
int retries, rc;
+ char errorstring[ERRORLENGTH];
/* Check the cqr */
rc = dasd_check_cqr(cqr);
@@ -809,10 +820,10 @@ int dasd_term_IO(struct dasd_ccw_req *cqr)
"device busy, retry later");
break;
default:
- DEV_MESSAGE(KERN_ERR, device,
- "line %d unknown RC=%d, please "
- "report to linux390@de.ibm.com",
- __LINE__, rc);
+ /* internal error 10 - unknown rc*/
+ snprintf(errorstring, ERRORLENGTH, "10 %d", rc);
+ dev_err(&device->cdev->dev, "An error occurred in the "
+ "DASD device driver, reason=%s\n", errorstring);
BUG();
break;
}
@@ -830,6 +841,7 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
{
struct dasd_device *device;
int rc;
+ char errorstring[ERRORLENGTH];
/* Check the cqr */
rc = dasd_check_cqr(cqr);
@@ -837,17 +849,23 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
return rc;
device = (struct dasd_device *) cqr->startdev;
if (cqr->retries < 0) {
- DEV_MESSAGE(KERN_DEBUG, device,
- "start_IO: request %p (%02x/%i) - no retry left.",
- cqr, cqr->status, cqr->retries);
+ /* internal error 14 - start_IO run out of retries */
+ sprintf(errorstring, "14 %p", cqr);
+ dev_err(&device->cdev->dev, "An error occurred in the DASD "
+ "device driver, reason=%s\n", errorstring);
cqr->status = DASD_CQR_ERROR;
return -EIO;
}
cqr->startclk = get_clock();
cqr->starttime = jiffies;
cqr->retries--;
- rc = ccw_device_start(device->cdev, cqr->cpaddr, (long) cqr,
- cqr->lpm, 0);
+ if (cqr->cpmode == 1) {
+ rc = ccw_device_tm_start(device->cdev, cqr->cpaddr,
+ (long) cqr, cqr->lpm);
+ } else {
+ rc = ccw_device_start(device->cdev, cqr->cpaddr,
+ (long) cqr, cqr->lpm, 0);
+ }
switch (rc) {
case 0:
cqr->status = DASD_CQR_IN_IO;
@@ -856,11 +874,11 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
cqr);
break;
case -EBUSY:
- DBF_DEV_EVENT(DBF_ERR, device, "%s",
+ DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
"start_IO: device busy, retry later");
break;
case -ETIMEDOUT:
- DBF_DEV_EVENT(DBF_ERR, device, "%s",
+ DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
"start_IO: request timeout, retry later");
break;
case -EACCES:
@@ -870,19 +888,24 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
* Do a retry with all available pathes.
*/
cqr->lpm = LPM_ANYPATH;
- DBF_DEV_EVENT(DBF_ERR, device, "%s",
+ DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
"start_IO: selected pathes gone,"
" retry on all pathes");
break;
case -ENODEV:
+ DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+ "start_IO: -ENODEV device gone, retry");
+ break;
case -EIO:
- DBF_DEV_EVENT(DBF_ERR, device, "%s",
- "start_IO: device gone, retry");
+ DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
+ "start_IO: -EIO device gone, retry");
break;
default:
- DEV_MESSAGE(KERN_ERR, device,
- "line %d unknown RC=%d, please report"
- " to linux390@de.ibm.com", __LINE__, rc);
+ /* internal error 11 - unknown rc */
+ snprintf(errorstring, ERRORLENGTH, "11 %d", rc);
+ dev_err(&device->cdev->dev,
+ "An error occurred in the DASD device driver, "
+ "reason=%s\n", errorstring);
BUG();
break;
}
@@ -915,19 +938,10 @@ static void dasd_device_timeout(unsigned long ptr)
*/
void dasd_device_set_timer(struct dasd_device *device, int expires)
{
- if (expires == 0) {
- if (timer_pending(&device->timer))
- del_timer(&device->timer);
- return;
- }
- if (timer_pending(&device->timer)) {
- if (mod_timer(&device->timer, jiffies + expires))
- return;
- }
- device->timer.function = dasd_device_timeout;
- device->timer.data = (unsigned long) device;
- device->timer.expires = jiffies + expires;
- add_timer(&device->timer);
+ if (expires == 0)
+ del_timer(&device->timer);
+ else
+ mod_timer(&device->timer, jiffies + expires);
}
/*
@@ -935,8 +949,7 @@ void dasd_device_set_timer(struct dasd_device *device, int expires)
*/
void dasd_device_clear_timer(struct dasd_device *device)
{
- if (timer_pending(&device->timer))
- del_timer(&device->timer);
+ del_timer(&device->timer);
}
static void dasd_handle_killed_request(struct ccw_device *cdev,
@@ -949,7 +962,7 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
return;
cqr = (struct dasd_ccw_req *) intparm;
if (cqr->status != DASD_CQR_IN_IO) {
- MESSAGE(KERN_DEBUG,
+ DBF_EVENT(DBF_DEBUG,
"invalid status in handle_killed_request: "
"bus_id %s, status %02x",
dev_name(&cdev->dev), cqr->status);
@@ -960,8 +973,8 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
if (device == NULL ||
device != dasd_device_from_cdev_locked(cdev) ||
strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
- MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s",
- dev_name(&cdev->dev));
+ DBF_DEV_EVENT(DBF_DEBUG, device, "invalid device in request: "
+ "bus_id %s", dev_name(&cdev->dev));
return;
}
@@ -1000,11 +1013,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
case -EIO:
break;
case -ETIMEDOUT:
- printk(KERN_WARNING"%s(%s): request timed out\n",
+ DBF_EVENT(DBF_WARNING, "%s(%s): request timed out\n",
__func__, dev_name(&cdev->dev));
break;
default:
- printk(KERN_WARNING"%s(%s): unknown error %ld\n",
+ DBF_EVENT(DBF_WARNING, "%s(%s): unknown error %ld\n",
__func__, dev_name(&cdev->dev), PTR_ERR(irb));
}
dasd_handle_killed_request(cdev, intparm);
@@ -1013,15 +1026,11 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
now = get_clock();
- DBF_EVENT(DBF_ERR, "Interrupt: bus_id %s CS/DS %04x ip %08x",
- dev_name(&cdev->dev), ((irb->scsw.cmd.cstat << 8) |
- irb->scsw.cmd.dstat), (unsigned int) intparm);
-
/* check for unsolicited interrupts */
cqr = (struct dasd_ccw_req *) intparm;
- if (!cqr || ((irb->scsw.cmd.cc == 1) &&
- (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) &&
- (irb->scsw.cmd.stctl & SCSW_STCTL_STATUS_PEND))) {
+ if (!cqr || ((scsw_cc(&irb->scsw) == 1) &&
+ (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) &&
+ (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND))) {
if (cqr && cqr->status == DASD_CQR_IN_IO)
cqr->status = DASD_CQR_QUEUED;
device = dasd_device_from_cdev_locked(cdev);
@@ -1037,14 +1046,14 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
device = (struct dasd_device *) cqr->startdev;
if (!device ||
strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
- MESSAGE(KERN_DEBUG, "invalid device in request: bus_id %s",
- dev_name(&cdev->dev));
+ DBF_DEV_EVENT(DBF_DEBUG, device, "invalid device in request: "
+ "bus_id %s", dev_name(&cdev->dev));
return;
}
/* Check for clear pending */
if (cqr->status == DASD_CQR_CLEAR_PENDING &&
- irb->scsw.cmd.fctl & SCSW_FCTL_CLEAR_FUNC) {
+ scsw_fctl(&irb->scsw) & SCSW_FCTL_CLEAR_FUNC) {
cqr->status = DASD_CQR_CLEARED;
dasd_device_clear_timer(device);
wake_up(&dasd_flush_wq);
@@ -1052,19 +1061,17 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
return;
}
- /* check status - the request might have been killed by dyn detach */
+ /* check status - the request might have been killed by dyn detach */
if (cqr->status != DASD_CQR_IN_IO) {
- MESSAGE(KERN_DEBUG,
- "invalid status: bus_id %s, status %02x",
- dev_name(&cdev->dev), cqr->status);
+ DBF_DEV_EVENT(DBF_DEBUG, device, "invalid status: bus_id %s, "
+ "status %02x", dev_name(&cdev->dev), cqr->status);
return;
}
- DBF_DEV_EVENT(DBF_DEBUG, device, "Int: CS/DS 0x%04x for cqr %p",
- ((irb->scsw.cmd.cstat << 8) | irb->scsw.cmd.dstat), cqr);
+
next = NULL;
expires = 0;
- if (irb->scsw.cmd.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) &&
- irb->scsw.cmd.cstat == 0 && !irb->esw.esw0.erw.cons) {
+ if (scsw_dstat(&irb->scsw) == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) &&
+ scsw_cstat(&irb->scsw) == 0) {
/* request was completed successfully */
cqr->status = DASD_CQR_SUCCESS;
cqr->stopclk = now;
@@ -1075,18 +1082,23 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
}
} else { /* error */
memcpy(&cqr->irb, irb, sizeof(struct irb));
+ /* log sense for every failed I/O to s390 debugfeature */
+ dasd_log_sense_dbf(cqr, irb);
if (device->features & DASD_FEATURE_ERPLOG) {
dasd_log_sense(cqr, irb);
}
+
/*
* If we don't want complex ERP for this request, then just
* reset this and retry it in the fastpath
*/
if (!test_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags) &&
cqr->retries > 0) {
- DEV_MESSAGE(KERN_DEBUG, device,
- "default ERP in fastpath (%i retries left)",
- cqr->retries);
+ if (cqr->lpm == LPM_ANYPATH)
+ DBF_DEV_EVENT(DBF_DEBUG, device,
+ "default ERP in fastpath "
+ "(%i retries left)",
+ cqr->retries);
cqr->lpm = LPM_ANYPATH;
cqr->status = DASD_CQR_QUEUED;
next = cqr;
@@ -1097,10 +1109,6 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
(!device->stopped)) {
if (device->discipline->start_IO(next) == 0)
expires = next->expires;
- else
- DEV_MESSAGE(KERN_DEBUG, device, "%s",
- "Interrupt fastpath "
- "failed!");
}
if (expires != 0)
dasd_device_set_timer(device, expires);
@@ -1173,6 +1181,7 @@ static void __dasd_device_process_final_queue(struct dasd_device *device,
struct dasd_block *block;
void (*callback)(struct dasd_ccw_req *, void *data);
void *callback_data;
+ char errorstring[ERRORLENGTH];
list_for_each_safe(l, n, final_queue) {
cqr = list_entry(l, struct dasd_ccw_req, devlist);
@@ -1193,10 +1202,11 @@ static void __dasd_device_process_final_queue(struct dasd_device *device,
cqr->status = DASD_CQR_TERMINATED;
break;
default:
- DEV_MESSAGE(KERN_ERR, device,
- "wrong cqr status in __dasd_process_final_queue "
- "for cqr %p, status %x",
- cqr, cqr->status);
+ /* internal error 12 - wrong cqr status*/
+ snprintf(errorstring, ERRORLENGTH, "12 %p %x02", cqr, cqr->status);
+ dev_err(&device->cdev->dev,
+ "An error occurred in the DASD device driver, "
+ "reason=%s\n", errorstring);
BUG();
}
if (cqr->callback != NULL)
@@ -1221,18 +1231,17 @@ static void __dasd_device_check_expire(struct dasd_device *device)
(time_after_eq(jiffies, cqr->expires + cqr->starttime))) {
if (device->discipline->term_IO(cqr) != 0) {
/* Hmpf, try again in 5 sec */
- DEV_MESSAGE(KERN_ERR, device,
- "internal error - timeout (%is) expired "
- "for cqr %p, termination failed, "
- "retrying in 5s",
- (cqr->expires/HZ), cqr);
+ dev_err(&device->cdev->dev,
+ "cqr %p timed out (%is) but cannot be "
+ "ended, retrying in 5 s\n",
+ cqr, (cqr->expires/HZ));
cqr->expires += 5*HZ;
dasd_device_set_timer(device, 5*HZ);
} else {
- DEV_MESSAGE(KERN_ERR, device,
- "internal error - timeout (%is) expired "
- "for cqr %p (%i retries left)",
- (cqr->expires/HZ), cqr, cqr->retries);
+ dev_err(&device->cdev->dev,
+ "cqr %p timed out (%is), %i retries "
+ "remaining\n", cqr, (cqr->expires/HZ),
+ cqr->retries);
}
}
}
@@ -1294,10 +1303,9 @@ int dasd_flush_device_queue(struct dasd_device *device)
rc = device->discipline->term_IO(cqr);
if (rc) {
/* unable to terminate requeust */
- DEV_MESSAGE(KERN_ERR, device,
- "dasd flush ccw_queue is unable "
- " to terminate request %p",
- cqr);
+ dev_err(&device->cdev->dev,
+ "Flushing the DASD request queue "
+ "failed for request %p\n", cqr);
/* stop flush processing */
goto finished;
}
@@ -1541,10 +1549,9 @@ int dasd_cancel_req(struct dasd_ccw_req *cqr)
/* request in IO - terminate IO and release again */
rc = device->discipline->term_IO(cqr);
if (rc) {
- DEV_MESSAGE(KERN_ERR, device,
- "dasd_cancel_req is unable "
- " to terminate request %p, rc = %d",
- cqr, rc);
+ dev_err(&device->cdev->dev,
+ "Cancelling request %p failed with rc=%d\n",
+ cqr, rc);
} else {
cqr->stopclk = get_clock();
rc = 1;
@@ -1586,19 +1593,10 @@ static void dasd_block_timeout(unsigned long ptr)
*/
void dasd_block_set_timer(struct dasd_block *block, int expires)
{
- if (expires == 0) {
- if (timer_pending(&block->timer))
- del_timer(&block->timer);
- return;
- }
- if (timer_pending(&block->timer)) {
- if (mod_timer(&block->timer, jiffies + expires))
- return;
- }
- block->timer.function = dasd_block_timeout;
- block->timer.data = (unsigned long) block;
- block->timer.expires = jiffies + expires;
- add_timer(&block->timer);
+ if (expires == 0)
+ del_timer(&block->timer);
+ else
+ mod_timer(&block->timer, jiffies + expires);
}
/*
@@ -1606,8 +1604,7 @@ void dasd_block_set_timer(struct dasd_block *block, int expires)
*/
void dasd_block_clear_timer(struct dasd_block *block)
{
- if (timer_pending(&block->timer))
- del_timer(&block->timer);
+ del_timer(&block->timer);
}
/*
@@ -1631,7 +1628,7 @@ static inline void __dasd_block_process_erp(struct dasd_block *block,
if (cqr->status == DASD_CQR_DONE)
DBF_DEV_EVENT(DBF_NOTICE, device, "%s", "ERP successful");
else
- DEV_MESSAGE(KERN_ERR, device, "%s", "ERP unsuccessful");
+ dev_err(&device->cdev->dev, "ERP failed for the DASD\n");
erp_fn = device->discipline->erp_postaction(cqr);
erp_fn(cqr);
}
@@ -2005,8 +2002,11 @@ static void dasd_setup_queue(struct dasd_block *block)
blk_queue_max_sectors(block->request_queue, max);
blk_queue_max_phys_segments(block->request_queue, -1L);
blk_queue_max_hw_segments(block->request_queue, -1L);
- blk_queue_max_segment_size(block->request_queue, -1L);
- blk_queue_segment_boundary(block->request_queue, -1L);
+ /* with page sized segments we can translate each segement into
+ * one idaw/tidaw
+ */
+ blk_queue_max_segment_size(block->request_queue, PAGE_SIZE);
+ blk_queue_segment_boundary(block->request_queue, PAGE_SIZE - 1);
blk_queue_ordered(block->request_queue, QUEUE_ORDERED_DRAIN, NULL);
}
@@ -2057,8 +2057,9 @@ static int dasd_open(struct block_device *bdev, fmode_t mode)
}
if (dasd_probeonly) {
- DEV_MESSAGE(KERN_INFO, base, "%s",
- "No access to device due to probeonly mode");
+ dev_info(&base->cdev->dev,
+ "Accessing the DASD failed because it is in "
+ "probeonly mode\n");
rc = -EPERM;
goto out;
}
@@ -2115,7 +2116,8 @@ dasd_device_operations = {
.owner = THIS_MODULE,
.open = dasd_open,
.release = dasd_release,
- .locked_ioctl = dasd_ioctl,
+ .ioctl = dasd_ioctl,
+ .compat_ioctl = dasd_ioctl,
.getgeo = dasd_getgeo,
};
@@ -2157,14 +2159,14 @@ int dasd_generic_probe(struct ccw_device *cdev,
ret = ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP);
if (ret) {
- printk(KERN_WARNING
+ DBF_EVENT(DBF_WARNING,
"dasd_generic_probe: could not set ccw-device options "
"for %s\n", dev_name(&cdev->dev));
return ret;
}
ret = dasd_add_sysfs_files(cdev);
if (ret) {
- printk(KERN_WARNING
+ DBF_EVENT(DBF_WARNING,
"dasd_generic_probe: could not add sysfs entries "
"for %s\n", dev_name(&cdev->dev));
return ret;
@@ -2180,9 +2182,7 @@ int dasd_generic_probe(struct ccw_device *cdev,
(dasd_autodetect && dasd_busid_known(dev_name(&cdev->dev)) != 0))
ret = ccw_device_set_online(cdev);
if (ret)
- printk(KERN_WARNING
- "dasd_generic_probe: could not initially "
- "online ccw-device %s; return code: %d\n",
+ pr_warning("%s: Setting the DASD online failed with rc=%d\n",
dev_name(&cdev->dev), ret);
return 0;
}
@@ -2246,10 +2246,9 @@ int dasd_generic_set_online(struct ccw_device *cdev,
discipline = base_discipline;
if (device->features & DASD_FEATURE_USEDIAG) {
if (!dasd_diag_discipline_pointer) {
- printk (KERN_WARNING
- "dasd_generic couldn't online device %s "
- "- discipline DIAG not available\n",
- dev_name(&cdev->dev));
+ pr_warning("%s Setting the DASD online failed because "
+ "of missing DIAG discipline\n",
+ dev_name(&cdev->dev));
dasd_delete_device(device);
return -ENODEV;
}
@@ -2270,10 +2269,9 @@ int dasd_generic_set_online(struct ccw_device *cdev,
/* check_device will allocate block device if necessary */
rc = discipline->check_device(device);
if (rc) {
- printk (KERN_WARNING
- "dasd_generic couldn't online device %s "
- "with discipline %s rc=%i\n",
- dev_name(&cdev->dev), discipline->name, rc);
+ pr_warning("%s Setting the DASD online with discipline %s "
+ "failed with rc=%i\n",
+ dev_name(&cdev->dev), discipline->name, rc);
module_put(discipline->owner);
module_put(base_discipline->owner);
dasd_delete_device(device);
@@ -2282,9 +2280,8 @@ int dasd_generic_set_online(struct ccw_device *cdev,
dasd_set_target_state(device, DASD_STATE_ONLINE);
if (device->state <= DASD_STATE_KNOWN) {
- printk (KERN_WARNING
- "dasd_generic discipline not found for %s\n",
- dev_name(&cdev->dev));
+ pr_warning("%s Setting the DASD online failed because of a "
+ "missing discipline\n", dev_name(&cdev->dev));
rc = -ENODEV;
dasd_set_target_state(device, DASD_STATE_NEW);
if (device->block)
@@ -2328,13 +2325,13 @@ int dasd_generic_set_offline(struct ccw_device *cdev)
open_count = atomic_read(&device->block->open_count);
if (open_count > max_count) {
if (open_count > 0)
- printk(KERN_WARNING "Can't offline dasd "
- "device with open count = %i.\n",
- open_count);
+ pr_warning("%s: The DASD cannot be set offline "
+ "with open count %i\n",
+ dev_name(&cdev->dev), open_count);
else
- printk(KERN_WARNING "%s",
- "Can't offline dasd device due "
- "to internal use\n");
+ pr_warning("%s: The DASD cannot be set offline "
+ "while it is in use\n",
+ dev_name(&cdev->dev));
clear_bit(DASD_FLAG_OFFLINE, &device->flags);
dasd_put_device(device);
return -EBUSY;
@@ -2407,8 +2404,10 @@ static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
cqr = dasd_smalloc_request(magic, 1 /* RDC */, rdc_buffer_size, device);
if (IS_ERR(cqr)) {
- DEV_MESSAGE(KERN_WARNING, device, "%s",
- "Could not allocate RDC request");
+ /* internal error 13 - Allocating the RDC request failed*/
+ dev_err(&device->cdev->dev,
+ "An error occurred in the DASD device driver, "
+ "reason=%s\n", "13");
return cqr;
}
@@ -2445,6 +2444,40 @@ int dasd_generic_read_dev_chars(struct dasd_device *device, char *magic,
}
EXPORT_SYMBOL_GPL(dasd_generic_read_dev_chars);
+/*
+ * In command mode and transport mode we need to look for sense
+ * data in different places. The sense data itself is allways
+ * an array of 32 bytes, so we can unify the sense data access
+ * for both modes.
+ */
+char *dasd_get_sense(struct irb *irb)
+{
+ struct tsb *tsb = NULL;
+ char *sense = NULL;
+
+ if (scsw_is_tm(&irb->scsw) && (irb->scsw.tm.fcxs == 0x01)) {
+ if (irb->scsw.tm.tcw)
+ tsb = tcw_get_tsb((struct tcw *)(unsigned long)
+ irb->scsw.tm.tcw);
+ if (tsb && tsb->length == 64 && tsb->flags)
+ switch (tsb->flags & 0x07) {
+ case 1: /* tsa_iostat */
+ sense = tsb->tsa.iostat.sense;
+ break;
+ case 2: /* tsa_ddpc */
+ sense = tsb->tsa.ddpc.sense;
+ break;
+ default:
+ /* currently we don't use interrogate data */
+ break;
+ }
+ } else if (irb->esw.esw0.erw.cons) {
+ sense = irb->ecw;
+ }
+ return sense;
+}
+EXPORT_SYMBOL_GPL(dasd_get_sense);
+
static int __init dasd_init(void)
{
int rc;
@@ -2486,7 +2519,7 @@ static int __init dasd_init(void)
return 0;
failed:
- MESSAGE(KERN_INFO, "%s", "initialization not performed due to errors");
+ pr_info("The DASD device driver could not be initialized\n");
dasd_exit();
return rc;
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-02 17:18:11 +0000