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[PATCH] s390: 3270 fullscreen view

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Martin Schwidefsky <schwidefsky@de.ibm.com>

Fix fullscreen view of the 3270 device driver.

Signed-off-by: Richard Hitt <rbh00@utsglobal.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>
This commit is contained in:
Richard Hitt
2005-10-30 15:00:10 -08:00
committed by Linus Torvalds
parent d89ea9b8bb
commit ed3cb6f039
6 changed files with 317 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files

100
drivers/s390/char/raw3270.c
View File

@@ -25,6 +25,12 @@
#include "raw3270.h"
#include <linux/major.h>
#include <linux/kdev_t.h>
#include <linux/device.h>
struct class *class3270;
/* The main 3270 data structure. */
struct raw3270 {
struct list_head list;
@@ -41,6 +47,8 @@ struct raw3270 {
struct timer_list timer; /* Device timer. */
unsigned char *ascebc; /* ascii -> ebcdic table */
struct class_device *clttydev; /* 3270-class tty device ptr */
struct class_device *cltubdev; /* 3270-class tub device ptr */
};
/* raw3270->flags */
@@ -316,6 +324,22 @@ raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
return rc;
}
int
raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
{
struct raw3270 *rp;
int rc;
rp = view->dev;
if (!rp || rp->view != view)
rc = -EACCES;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
else
rc = __raw3270_start(rp, view, rq);
return rc;
}
int
raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq)
{
@@ -744,6 +768,22 @@ raw3270_reset_device(struct raw3270 *rp)
return rc;
}
int
raw3270_reset(struct raw3270_view *view)
{
struct raw3270 *rp;
int rc;
rp = view->dev;
if (!rp || rp->view != view)
rc = -EACCES;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
else
rc = raw3270_reset_device(view->dev);
return rc;
}
/*
* Setup new 3270 device.
*/
@@ -774,11 +814,12 @@ raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc)
/*
* Add device to list and find the smallest unused minor
* number for it.
* number for it. Note: there is no device with minor 0,
* see special case for fs3270.c:fs3270_open().
*/
down(&raw3270_sem);
/* Keep the list sorted. */
minor = 0;
minor = RAW3270_FIRSTMINOR;
rp->minor = -1;
list_for_each(l, &raw3270_devices) {
tmp = list_entry(l, struct raw3270, list);
@@ -789,7 +830,7 @@ raw3270_setup_device(struct ccw_device *cdev, struct raw3270 *rp, char *ascebc)
}
minor++;
}
if (rp->minor == -1 && minor < RAW3270_MAXDEVS) {
if (rp->minor == -1 && minor < RAW3270_MAXDEVS + RAW3270_FIRSTMINOR) {
rp->minor = minor;
list_add_tail(&rp->list, &raw3270_devices);
}
@@ -941,11 +982,12 @@ raw3270_deactivate_view(struct raw3270_view *view)
list_add_tail(&view->list, &rp->view_list);
/* Try to activate another view. */
if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) {
list_for_each_entry(view, &rp->view_list, list)
if (view->fn->activate(view) == 0) {
rp->view = view;
list_for_each_entry(view, &rp->view_list, list) {
rp->view = view;
if (view->fn->activate(view) == 0)
break;
}
rp->view = 0;
}
}
}
spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
@@ -961,6 +1003,8 @@ raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor)
struct raw3270 *rp;
int rc;
if (minor <= 0)
return -ENODEV;
down(&raw3270_sem);
rc = -ENODEV;
list_for_each_entry(rp, &raw3270_devices, list) {
@@ -976,7 +1020,7 @@ raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor)
view->cols = rp->cols;
view->ascebc = rp->ascebc;
spin_lock_init(&view->lock);
list_add_tail(&view->list, &rp->view_list);
list_add(&view->list, &rp->view_list);
rc = 0;
}
spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
@@ -1039,7 +1083,7 @@ raw3270_del_view(struct raw3270_view *view)
if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags)) {
/* Try to activate another view. */
list_for_each_entry(nv, &rp->view_list, list) {
if (nv->fn->activate(view) == 0) {
if (nv->fn->activate(nv) == 0) {
rp->view = nv;
break;
}
@@ -1063,6 +1107,12 @@ raw3270_delete_device(struct raw3270 *rp)
/* Remove from device chain. */
down(&raw3270_sem);
if (rp->clttydev)
class_device_destroy(class3270,
MKDEV(IBM_TTY3270_MAJOR, rp->minor));
if (rp->cltubdev)
class_device_destroy(class3270,
MKDEV(IBM_FS3270_MAJOR, rp->minor));
list_del_init(&rp->list);
up(&raw3270_sem);
@@ -1129,6 +1179,16 @@ raw3270_create_attributes(struct raw3270 *rp)
{
//FIXME: check return code
sysfs_create_group(&rp->cdev->dev.kobj, &raw3270_attr_group);
rp->clttydev =
class_device_create(class3270,
MKDEV(IBM_TTY3270_MAJOR, rp->minor),
&rp->cdev->dev, "tty%s",
rp->cdev->dev.bus_id);
rp->cltubdev =
class_device_create(class3270,
MKDEV(IBM_FS3270_MAJOR, rp->minor),
&rp->cdev->dev, "tub%s",
rp->cdev->dev.bus_id);
}
/*
@@ -1189,13 +1249,13 @@ raw3270_set_online (struct ccw_device *cdev)
return PTR_ERR(rp);
rc = raw3270_reset_device(rp);
if (rc)
return rc;
goto failure;
rc = raw3270_size_device(rp);
if (rc)
return rc;
goto failure;
rc = raw3270_reset_device(rp);
if (rc)
return rc;
goto failure;
raw3270_create_attributes(rp);
set_bit(RAW3270_FLAGS_READY, &rp->flags);
down(&raw3270_sem);
@@ -1203,6 +1263,10 @@ raw3270_set_online (struct ccw_device *cdev)
np->notifier(rp->minor, 1);
up(&raw3270_sem);
return 0;
failure:
raw3270_delete_device(rp);
return rc;
}
/*
@@ -1217,6 +1281,14 @@ raw3270_remove (struct ccw_device *cdev)
struct raw3270_notifier *np;
rp = cdev->dev.driver_data;
/*
* _remove is the opposite of _probe; it's probe that
* should set up rp. raw3270_remove gets entered for
* devices even if they haven't been varied online.
* Thus, rp may validly be NULL here.
*/
if (rp == NULL)
return;
clear_bit(RAW3270_FLAGS_READY, &rp->flags);
sysfs_remove_group(&cdev->dev.kobj, &raw3270_attr_group);
@@ -1301,6 +1373,7 @@ raw3270_init(void)
if (rc == 0) {
/* Create attributes for early (= console) device. */
down(&raw3270_sem);
class3270 = class_create(THIS_MODULE, "3270");
list_for_each_entry(rp, &raw3270_devices, list) {
get_device(&rp->cdev->dev);
raw3270_create_attributes(rp);
@@ -1314,6 +1387,7 @@ static void
raw3270_exit(void)
{
ccw_driver_unregister(&raw3270_ccw_driver);
class_destroy(class3270);
}
MODULE_LICENSE("GPL");
@@ -1335,7 +1409,9 @@ EXPORT_SYMBOL(raw3270_find_view);
EXPORT_SYMBOL(raw3270_activate_view);
EXPORT_SYMBOL(raw3270_deactivate_view);
EXPORT_SYMBOL(raw3270_start);
EXPORT_SYMBOL(raw3270_start_locked);
EXPORT_SYMBOL(raw3270_start_irq);
EXPORT_SYMBOL(raw3270_reset);
EXPORT_SYMBOL(raw3270_register_notifier);
EXPORT_SYMBOL(raw3270_unregister_notifier);
EXPORT_SYMBOL(raw3270_wait_queue);