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path: root/drivers/s390/char/con3270.c
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Diffstat (limited to 'drivers/s390/char/con3270.c')
-rw-r--r--drivers/s390/char/con3270.c79
1 files changed, 34 insertions, 45 deletions
diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index d028d2ee83d..75ffe9980c3 100644
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -1,19 +1,19 @@
/*
- * drivers/s390/char/con3270.c
- * IBM/3270 Driver - console view.
+ * IBM/3270 Driver - console view.
*
- * 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>
+#include <linux/module.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/types.h>
+#include <linux/slab.h>
#include <linux/err.h>
#include <linux/reboot.h>
@@ -31,12 +31,14 @@
static struct raw3270_fn con3270_fn;
+static bool auto_update = 1;
+module_param(auto_update, bool, 0);
+
/*
* Main 3270 console view data structure.
*/
struct con3270 {
struct raw3270_view view;
- spinlock_t lock;
struct list_head freemem; /* list of free memory for strings. */
/* Output stuff. */
@@ -64,7 +66,7 @@ static struct con3270 *condev;
#define CON_UPDATE_ERASE 1 /* Use EWRITEA instead of WRITE. */
#define CON_UPDATE_LIST 2 /* Update lines in tty3270->update. */
#define CON_UPDATE_STATUS 4 /* Update status line. */
-#define CON_UPDATE_ALL 7
+#define CON_UPDATE_ALL 8 /* Recreate screen. */
static void con3270_update(struct con3270 *);
@@ -73,18 +75,10 @@ static void con3270_update(struct con3270 *);
*/
static void con3270_set_timer(struct con3270 *cp, int expires)
{
- if (expires == 0) {
- if (timer_pending(&cp->timer))
- del_timer(&cp->timer);
- return;
- }
- if (timer_pending(&cp->timer) &&
- mod_timer(&cp->timer, jiffies + expires))
- return;
- cp->timer.function = (void (*)(unsigned long)) con3270_update;
- cp->timer.data = (unsigned long) cp;
- cp->timer.expires = jiffies + expires;
- add_timer(&cp->timer);
+ if (expires == 0)
+ del_timer(&cp->timer);
+ else
+ mod_timer(&cp->timer, jiffies + expires);
}
/*
@@ -214,6 +208,8 @@ con3270_update(struct con3270 *cp)
struct string *s, *n;
int rc;
+ if (!auto_update && !raw3270_view_active(&cp->view))
+ return;
if (cp->view.dev)
raw3270_activate_view(&cp->view);
@@ -225,6 +221,12 @@ con3270_update(struct con3270 *cp)
spin_lock_irqsave(&cp->view.lock, flags);
updated = 0;
+ if (cp->update_flags & CON_UPDATE_ALL) {
+ con3270_rebuild_update(cp);
+ con3270_update_status(cp);
+ cp->update_flags = CON_UPDATE_ERASE | CON_UPDATE_LIST |
+ CON_UPDATE_STATUS;
+ }
if (cp->update_flags & CON_UPDATE_ERASE) {
/* Use erase write alternate to initialize display. */
raw3270_request_set_cmd(wrq, TC_EWRITEA);
@@ -302,7 +304,6 @@ con3270_read_tasklet(struct raw3270_request *rrq)
deactivate = 1;
break;
case 0x6d: /* clear: start from scratch. */
- con3270_rebuild_update(cp);
cp->update_flags = CON_UPDATE_ALL;
con3270_set_timer(cp, 1);
break;
@@ -382,30 +383,21 @@ con3270_issue_read(struct con3270 *cp)
static int
con3270_activate(struct raw3270_view *view)
{
- unsigned long flags;
struct con3270 *cp;
cp = (struct con3270 *) view;
- spin_lock_irqsave(&cp->view.lock, flags);
- cp->nr_up = 0;
- con3270_rebuild_update(cp);
- con3270_update_status(cp);
cp->update_flags = CON_UPDATE_ALL;
con3270_set_timer(cp, 1);
- spin_unlock_irqrestore(&cp->view.lock, flags);
return 0;
}
static void
con3270_deactivate(struct raw3270_view *view)
{
- unsigned long flags;
struct con3270 *cp;
cp = (struct con3270 *) view;
- spin_lock_irqsave(&cp->view.lock, flags);
del_timer(&cp->timer);
- spin_unlock_irqrestore(&cp->view.lock, flags);
}
static int
@@ -504,6 +496,7 @@ con3270_write(struct console *co, const char *str, unsigned int count)
con3270_cline_end(cp);
}
/* Setup timer to output current console buffer after 1/10 second */
+ cp->nr_up = 0;
if (cp->view.dev && !timer_pending(&cp->timer))
con3270_set_timer(cp, HZ/10);
spin_unlock_irqrestore(&cp->view.lock,flags);
@@ -541,6 +534,8 @@ con3270_flush(void)
cp = condev;
if (!cp->view.dev)
return;
+ raw3270_pm_unfreeze(&cp->view);
+ raw3270_activate_view(&cp->view);
spin_lock_irqsave(&cp->view.lock, flags);
con3270_wait_write(cp);
cp->nr_up = 0;
@@ -584,12 +579,10 @@ static struct console con3270 = {
/*
* 3270 console initialization code called from console_init().
- * NOTE: This is called before kmalloc is available.
*/
static int __init
con3270_init(void)
{
- struct ccw_device *cdev;
struct raw3270 *rp;
void *cbuf;
int i;
@@ -604,27 +597,23 @@ con3270_init(void)
cpcmd("TERM AUTOCR OFF", NULL, 0, NULL);
}
- cdev = ccw_device_probe_console();
- if (IS_ERR(cdev))
- return -ENODEV;
- rp = raw3270_setup_console(cdev);
+ rp = raw3270_setup_console();
if (IS_ERR(rp))
return PTR_ERR(rp);
- condev = (struct con3270 *) alloc_bootmem_low(sizeof(struct con3270));
- memset(condev, 0, sizeof(struct con3270));
+ condev = kzalloc(sizeof(struct con3270), GFP_KERNEL | GFP_DMA);
condev->view.dev = rp;
- condev->read = raw3270_request_alloc_bootmem(0);
+ condev->read = raw3270_request_alloc(0);
condev->read->callback = con3270_read_callback;
condev->read->callback_data = condev;
- condev->write =
- raw3270_request_alloc_bootmem(CON3270_OUTPUT_BUFFER_SIZE);
- condev->kreset = raw3270_request_alloc_bootmem(1);
+ condev->write = raw3270_request_alloc(CON3270_OUTPUT_BUFFER_SIZE);
+ condev->kreset = raw3270_request_alloc(1);
INIT_LIST_HEAD(&condev->lines);
INIT_LIST_HEAD(&condev->update);
- init_timer(&condev->timer);
+ setup_timer(&condev->timer, (void (*)(unsigned long)) con3270_update,
+ (unsigned long) condev);
tasklet_init(&condev->readlet,
(void (*)(unsigned long)) con3270_read_tasklet,
(unsigned long) condev->read);
@@ -633,7 +622,7 @@ con3270_init(void)
INIT_LIST_HEAD(&condev->freemem);
for (i = 0; i < CON3270_STRING_PAGES; i++) {
- cbuf = (void *) alloc_bootmem_low_pages(PAGE_SIZE);
+ cbuf = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
add_string_memory(&condev->freemem, cbuf, PAGE_SIZE);
}
condev->cline = alloc_string(&condev->freemem, condev->view.cols);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 21:38:09 +0000