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path: root/drivers/s390/char/raw3270.c
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Diffstat (limited to 'drivers/s390/char/raw3270.c')
-rw-r--r--drivers/s390/char/raw3270.c100
1 files changed, 81 insertions, 19 deletions
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 0b15cf107ec9..acab7b2dfe8a 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -1,11 +1,10 @@
/*
- * drivers/s390/char/raw3270.c
- * IBM/3270 Driver - core functions.
+ * IBM/3270 Driver - core functions.
*
- * Author(s):
- * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
- * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
- * -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s):
+ * Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
+ * Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Copyright IBM Corp. 2003, 2009
*/
#include <linux/bootmem.h>
@@ -61,6 +60,7 @@ struct raw3270 {
#define RAW3270_FLAGS_ATTN 2 /* Device sent an ATTN interrupt */
#define RAW3270_FLAGS_READY 4 /* Device is useable by views */
#define RAW3270_FLAGS_CONSOLE 8 /* Device is the console. */
+#define RAW3270_FLAGS_FROZEN 16 /* set if 3270 is frozen for suspend */
/* Semaphore to protect global data of raw3270 (devices, views, etc). */
static DEFINE_MUTEX(raw3270_mutex);
@@ -306,7 +306,8 @@ raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
rp = view->dev;
- if (!rp || rp->view != view)
+ if (!rp || rp->view != view ||
+ test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
@@ -323,7 +324,8 @@ raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
int rc;
rp = view->dev;
- if (!rp || rp->view != view)
+ if (!rp || rp->view != view ||
+ test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
@@ -355,7 +357,7 @@ raw3270_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
struct raw3270_request *rq;
int rc;
- rp = (struct raw3270 *) cdev->dev.driver_data;
+ rp = dev_get_drvdata(&cdev->dev);
if (!rp)
return;
rq = (struct raw3270_request *) intparm;
@@ -764,7 +766,8 @@ raw3270_reset(struct raw3270_view *view)
int rc;
rp = view->dev;
- if (!rp || rp->view != view)
+ if (!rp || rp->view != view ||
+ test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
@@ -828,7 +831,7 @@ raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc)
if (rp->minor == -1)
return -EUSERS;
rp->cdev = cdev;
- cdev->dev.driver_data = rp;
+ dev_set_drvdata(&cdev->dev, rp);
cdev->handler = raw3270_irq;
return 0;
}
@@ -922,6 +925,8 @@ raw3270_activate_view(struct raw3270_view *view)
rc = 0;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
+ else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
+ rc = -EACCES;
else {
oldview = NULL;
if (rp->view) {
@@ -969,7 +974,8 @@ raw3270_deactivate_view(struct raw3270_view *view)
list_del_init(&view->list);
list_add_tail(&view->list, &rp->view_list);
/* Try to activate another view. */
- if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) {
+ if (test_bit(RAW3270_FLAGS_READY, &rp->flags) &&
+ !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
list_for_each_entry(view, &rp->view_list, list) {
rp->view = view;
if (view->fn->activate(view) == 0)
@@ -1068,7 +1074,8 @@ raw3270_del_view(struct raw3270_view *view)
rp->view = NULL;
}
list_del_init(&view->list);
- if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags)) {
+ if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags) &&
+ !test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
/* Try to activate another view. */
list_for_each_entry(nv, &rp->view_list, list) {
if (nv->fn->activate(nv) == 0) {
@@ -1105,7 +1112,7 @@ raw3270_delete_device(struct raw3270 *rp)
/* Disconnect from ccw_device. */
cdev = rp->cdev;
rp->cdev = NULL;
- cdev->dev.driver_data = NULL;
+ dev_set_drvdata(&cdev->dev, NULL);
cdev->handler = NULL;
/* Put ccw_device structure. */
@@ -1129,7 +1136,7 @@ static ssize_t
raw3270_model_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%i\n",
- ((struct raw3270 *) dev->driver_data)->model);
+ ((struct raw3270 *) dev_get_drvdata(dev))->model);
}
static DEVICE_ATTR(model, 0444, raw3270_model_show, NULL);
@@ -1137,7 +1144,7 @@ static ssize_t
raw3270_rows_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%i\n",
- ((struct raw3270 *) dev->driver_data)->rows);
+ ((struct raw3270 *) dev_get_drvdata(dev))->rows);
}
static DEVICE_ATTR(rows, 0444, raw3270_rows_show, NULL);
@@ -1145,7 +1152,7 @@ static ssize_t
raw3270_columns_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%i\n",
- ((struct raw3270 *) dev->driver_data)->cols);
+ ((struct raw3270 *) dev_get_drvdata(dev))->cols);
}
static DEVICE_ATTR(columns, 0444, raw3270_columns_show, NULL);
@@ -1282,7 +1289,7 @@ raw3270_remove (struct ccw_device *cdev)
struct raw3270_view *v;
struct raw3270_notifier *np;
- rp = cdev->dev.driver_data;
+ rp = dev_get_drvdata(&cdev->dev);
/*
* _remove is the opposite of _probe; it's probe that
* should set up rp. raw3270_remove gets entered for
@@ -1330,13 +1337,65 @@ raw3270_set_offline (struct ccw_device *cdev)
{
struct raw3270 *rp;
- rp = cdev->dev.driver_data;
+ rp = dev_get_drvdata(&cdev->dev);
if (test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags))
return -EBUSY;
raw3270_remove(cdev);
return 0;
}
+static int raw3270_pm_stop(struct ccw_device *cdev)
+{
+ struct raw3270 *rp;
+ struct raw3270_view *view;
+ unsigned long flags;
+
+ rp = cdev->dev.driver_data;
+ if (!rp)
+ return 0;
+ spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
+ if (rp->view)
+ rp->view->fn->deactivate(rp->view);
+ if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) {
+ /*
+ * Release tty and fullscreen for all non-console
+ * devices.
+ */
+ list_for_each_entry(view, &rp->view_list, list) {
+ if (view->fn->release)
+ view->fn->release(view);
+ }
+ }
+ set_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
+ spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
+ return 0;
+}
+
+static int raw3270_pm_start(struct ccw_device *cdev)
+{
+ struct raw3270 *rp;
+ unsigned long flags;
+
+ rp = cdev->dev.driver_data;
+ if (!rp)
+ return 0;
+ spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
+ clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
+ if (rp->view)
+ rp->view->fn->activate(rp->view);
+ spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
+ return 0;
+}
+
+void raw3270_pm_unfreeze(struct raw3270_view *view)
+{
+ struct raw3270 *rp;
+
+ rp = view->dev;
+ if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
+ ccw_device_force_console();
+}
+
static struct ccw_device_id raw3270_id[] = {
{ CCW_DEVICE(0x3270, 0) },
{ CCW_DEVICE(0x3271, 0) },
@@ -1360,6 +1419,9 @@ static struct ccw_driver raw3270_ccw_driver = {
.remove = &raw3270_remove,
.set_online = &raw3270_set_online,
.set_offline = &raw3270_set_offline,
+ .freeze = &raw3270_pm_stop,
+ .thaw = &raw3270_pm_start,
+ .restore = &raw3270_pm_start,
};
static int
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-02 22:33:50 +0200