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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.c119
1 files changed, 59 insertions, 60 deletions
diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index 7566be89068..75ffe9980c3 100644
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -1,20 +1,21 @@
/*
- * 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>
#include <asm/ccwdev.h>
#include <asm/cio.h>
@@ -22,6 +23,7 @@
#include <asm/ebcdic.h>
#include "raw3270.h"
+#include "tty3270.h"
#include "ctrlchar.h"
#define CON3270_OUTPUT_BUFFER_SIZE 1024
@@ -29,12 +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. */
@@ -62,28 +66,19 @@ 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 *);
/*
* Setup timeout for a device. On timeout trigger an update.
*/
-void
-con3270_set_timer(struct con3270 *cp, int expires)
+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);
}
/*
@@ -213,6 +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);
@@ -224,6 +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);
@@ -301,7 +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;
@@ -381,45 +383,36 @@ 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
con3270_irq(struct con3270 *cp, struct raw3270_request *rq, struct irb *irb)
{
/* Handle ATTN. Schedule tasklet to read aid. */
- if (irb->scsw.dstat & DEV_STAT_ATTENTION)
+ if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION)
con3270_issue_read(cp);
if (rq) {
- if (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)
+ if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
rq->rc = -EIO;
else
/* Normal end. Copy residual count. */
- rq->rescnt = irb->scsw.count;
+ rq->rescnt = irb->scsw.cmd.count;
}
return RAW3270_IO_DONE;
}
@@ -503,13 +496,12 @@ 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);
}
-extern struct tty_driver *tty3270_driver;
-
static struct tty_driver *
con3270_device(struct console *c, int *index)
{
@@ -530,11 +522,11 @@ con3270_wait_write(struct con3270 *cp)
}
/*
- * panic() calls console_unblank before the system enters a
- * disabled, endless loop.
+ * panic() calls con3270_flush through a panic_notifier
+ * before the system enters a disabled, endless loop.
*/
static void
-con3270_unblank(void)
+con3270_flush(void)
{
struct con3270 *cp;
unsigned long flags;
@@ -542,6 +534,8 @@ con3270_unblank(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;
@@ -556,12 +550,23 @@ con3270_unblank(void)
spin_unlock_irqrestore(&cp->view.lock, flags);
}
-static int __init
-con3270_consetup(struct console *co, char *options)
+static int con3270_notify(struct notifier_block *self,
+ unsigned long event, void *data)
{
- return 0;
+ con3270_flush();
+ return NOTIFY_OK;
}
+static struct notifier_block on_panic_nb = {
+ .notifier_call = con3270_notify,
+ .priority = 0,
+};
+
+static struct notifier_block on_reboot_nb = {
+ .notifier_call = con3270_notify,
+ .priority = 0,
+};
+
/*
* The console structure for the 3270 console
*/
@@ -569,19 +574,15 @@ static struct console con3270 = {
.name = "tty3270",
.write = con3270_write,
.device = con3270_device,
- .unblank = con3270_unblank,
- .setup = con3270_consetup,
.flags = CON_PRINTBUFFER,
};
/*
* 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;
@@ -596,27 +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);
@@ -625,13 +622,15 @@ 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);
condev->cline->len = 0;
con3270_create_status(condev);
condev->input = alloc_string(&condev->freemem, 80);
+ atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
+ register_reboot_notifier(&on_reboot_nb);
register_console(&con3270);
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-09 08:21:34 +0000