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WSL2-Linux-Kernel
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[PATCH] s390: 3270 fullscreen view 

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 коммит произвёл Linus Torvalds
Родитель d89ea9b8bb
Коммит ed3cb6f039
6 изменённых файлов: 317 добавлений и 71 удалений
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9
arch/s390/kernel/compat_ioctl.c
Просмотреть файл

@ -18,6 +18,8 @@
#include <asm/dasd.h>
#include <asm/cmb.h>
#include <asm/tape390.h>
#include <asm/ccwdev.h>
#include "../../../drivers/s390/char/raw3270.h"
static int do_ioctl32_pointer(unsigned int fd, unsigned int cmd,
unsigned long arg, struct file *f)
@ -62,6 +64,13 @@ COMPATIBLE_IOCTL(BIODASDCMFENABLE)
COMPATIBLE_IOCTL(BIODASDCMFDISABLE)
COMPATIBLE_IOCTL(BIODASDREADALLCMB)
COMPATIBLE_IOCTL(TUBICMD)
COMPATIBLE_IOCTL(TUBOCMD)
COMPATIBLE_IOCTL(TUBGETI)
COMPATIBLE_IOCTL(TUBGETO)
COMPATIBLE_IOCTL(TUBSETMOD)
COMPATIBLE_IOCTL(TUBGETMOD)
COMPATIBLE_IOCTL(TAPE390_DISPLAY)
/* s390 doesn't need handlers here */

7
drivers/s390/char/con3270.c
Просмотреть файл

@ -213,6 +213,9 @@ con3270_update(struct con3270 *cp)
struct string *s, *n;
int rc;
if (cp->view.dev)
raw3270_activate_view(&cp->view);
wrq = xchg(&cp->write, 0);
if (!wrq) {
con3270_set_timer(cp, 1);
@ -489,8 +492,6 @@ con3270_write(struct console *co, const char *str, unsigned int count)
unsigned char c;
cp = condev;
if (cp->view.dev)
raw3270_activate_view(&cp->view);
spin_lock_irqsave(&cp->view.lock, flags);
while (count-- > 0) {
c = *str++;
@ -620,7 +621,7 @@ con3270_init(void)
(void (*)(unsigned long)) con3270_read_tasklet,
(unsigned long) condev->read);
raw3270_add_view(&condev->view, &con3270_fn, 0);
raw3270_add_view(&condev->view, &con3270_fn, 1);
INIT_LIST_HEAD(&condev->freemem);
for (i = 0; i < CON3270_STRING_PAGES; i++) {

238
drivers/s390/char/fs3270.c
Просмотреть файл

@ -33,8 +33,11 @@ struct fs3270 {
int read_command; /* ccw command to use for reads. */
int write_command; /* ccw command to use for writes. */
int attention; /* Got attention. */
struct raw3270_request *clear; /* single clear request. */
wait_queue_head_t attn_wait; /* Attention wait queue. */
int active; /* Fullscreen view is active. */
struct raw3270_request *init; /* single init request. */
wait_queue_head_t wait; /* Init & attention wait queue. */
struct idal_buffer *rdbuf; /* full-screen-deactivate buffer */
size_t rdbuf_size; /* size of data returned by RDBUF */
};
static void
@ -43,58 +46,172 @@ fs3270_wake_up(struct raw3270_request *rq, void *data)
wake_up((wait_queue_head_t *) data);
}
static inline int
fs3270_working(struct fs3270 *fp)
{
/*
* The fullscreen view is in working order if the view
* has been activated AND the initial request is finished.
*/
return fp->active && raw3270_request_final(fp->init);
}
static int
fs3270_do_io(struct raw3270_view *view, struct raw3270_request *rq)
{
wait_queue_head_t wq;
struct fs3270 *fp;
int rc;
init_waitqueue_head(&wq);
fp = (struct fs3270 *) view;
rq->callback = fs3270_wake_up;
rq->callback_data = &wq;
rc = raw3270_start(view, rq);
if (rc)
return rc;
/* Started sucessfully. Now wait for completion. */
wait_event(wq, raw3270_request_final(rq));
return rq->rc;
}
rq->callback_data = &fp->wait;
static void
fs3270_reset_callback(struct raw3270_request *rq, void *data)
{
raw3270_request_reset(rq);
do {
if (!fs3270_working(fp)) {
/* Fullscreen view isn't ready yet. */
rc = wait_event_interruptible(fp->wait,
fs3270_working(fp));
if (rc != 0)
break;
}
rc = raw3270_start(view, rq);
if (rc == 0) {
/* Started sucessfully. Now wait for completion. */
wait_event(fp->wait, raw3270_request_final(rq));
}
} while (rc == -EACCES);
return rc;
}
/*
* Switch to the fullscreen view.
*/
static void
fs3270_reset_callback(struct raw3270_request *rq, void *data)
{
struct fs3270 *fp;
fp = (struct fs3270 *) rq->view;
raw3270_request_reset(rq);
wake_up(&fp->wait);
}
static void
fs3270_restore_callback(struct raw3270_request *rq, void *data)
{
struct fs3270 *fp;
fp = (struct fs3270 *) rq->view;
if (rq->rc != 0 || rq->rescnt != 0) {
if (fp->fs_pid)
kill_proc(fp->fs_pid, SIGHUP, 1);
}
fp->rdbuf_size = 0;
raw3270_request_reset(rq);
wake_up(&fp->wait);
}
static int
fs3270_activate(struct raw3270_view *view)
{
struct fs3270 *fp;
char *cp;
int rc;
fp = (struct fs3270 *) view;
raw3270_request_set_cmd(fp->clear, TC_EWRITEA);
fp->clear->callback = fs3270_reset_callback;
return raw3270_start(view, fp->clear);
/* If an old init command is still running just return. */
if (!raw3270_request_final(fp->init))
return 0;
if (fp->rdbuf_size == 0) {
/* No saved buffer. Just clear the screen. */
raw3270_request_set_cmd(fp->init, TC_EWRITEA);
fp->init->callback = fs3270_reset_callback;
} else {
/* Restore fullscreen buffer saved by fs3270_deactivate. */
raw3270_request_set_cmd(fp->init, TC_EWRITEA);
raw3270_request_set_idal(fp->init, fp->rdbuf);
fp->init->ccw.count = fp->rdbuf_size;
cp = fp->rdbuf->data[0];
cp[0] = TW_KR;
cp[1] = TO_SBA;
cp[2] = cp[6];
cp[3] = cp[7];
cp[4] = TO_IC;
cp[5] = TO_SBA;
cp[6] = 0x40;
cp[7] = 0x40;
fp->init->rescnt = 0;
fp->init->callback = fs3270_restore_callback;
}
rc = fp->init->rc = raw3270_start_locked(view, fp->init);
if (rc)
fp->init->callback(fp->init, NULL);
else
fp->active = 1;
return rc;
}
/*
* Shutdown fullscreen view.
*/
static void
fs3270_save_callback(struct raw3270_request *rq, void *data)
{
struct fs3270 *fp;
fp = (struct fs3270 *) rq->view;
/* Correct idal buffer element 0 address. */
fp->rdbuf->data[0] -= 5;
fp->rdbuf->size += 5;
/*
* If the rdbuf command failed or the idal buffer is
* to small for the amount of data returned by the
* rdbuf command, then we have no choice but to send
* a SIGHUP to the application.
*/
if (rq->rc != 0 || rq->rescnt == 0) {
if (fp->fs_pid)
kill_proc(fp->fs_pid, SIGHUP, 1);
fp->rdbuf_size = 0;
} else
fp->rdbuf_size = fp->rdbuf->size - rq->rescnt;
raw3270_request_reset(rq);
wake_up(&fp->wait);
}
static void
fs3270_deactivate(struct raw3270_view *view)
{
// FIXME: is this a good idea? The user program using fullscreen 3270
// will die just because a console message appeared. On the other
// hand the fullscreen device is unoperational now.
struct fs3270 *fp;
fp = (struct fs3270 *) view;
if (fp->fs_pid != 0)
kill_proc(fp->fs_pid, SIGHUP, 1);
fp->fs_pid = 0;
fp->active = 0;
/* If an old init command is still running just return. */
if (!raw3270_request_final(fp->init))
return;
/* Prepare read-buffer request. */
raw3270_request_set_cmd(fp->init, TC_RDBUF);
/*
* Hackish: skip first 5 bytes of the idal buffer to make
* room for the TW_KR/TO_SBA/<address>/<address>/TO_IC sequence
* in the activation command.
*/
fp->rdbuf->data[0] += 5;
fp->rdbuf->size -= 5;
raw3270_request_set_idal(fp->init, fp->rdbuf);
fp->init->rescnt = 0;
fp->init->callback = fs3270_save_callback;
/* Start I/O to read in the 3270 buffer. */
fp->init->rc = raw3270_start_locked(view, fp->init);
if (fp->init->rc)
fp->init->callback(fp->init, NULL);
}
static int
@ -103,7 +220,7 @@ fs3270_irq(struct fs3270 *fp, struct raw3270_request *rq, struct irb *irb)
/* Handle ATTN. Set indication and wake waiters for attention. */
if (irb->scsw.dstat & DEV_STAT_ATTENTION) {
fp->attention = 1;
wake_up(&fp->attn_wait);
wake_up(&fp->wait);
}
if (rq) {
@ -125,7 +242,7 @@ fs3270_read(struct file *filp, char *data, size_t count, loff_t *off)
struct fs3270 *fp;
struct raw3270_request *rq;
struct idal_buffer *ib;
int rc;
ssize_t rc;
if (count == 0 || count > 65535)
return -EINVAL;
@ -133,7 +250,7 @@ fs3270_read(struct file *filp, char *data, size_t count, loff_t *off)
if (!fp)
return -ENODEV;
ib = idal_buffer_alloc(count, 0);
if (!ib)
if (IS_ERR(ib))
return -ENOMEM;
rq = raw3270_request_alloc(0);
if (!IS_ERR(rq)) {
@ -141,10 +258,19 @@ fs3270_read(struct file *filp, char *data, size_t count, loff_t *off)
fp->read_command = 6;
raw3270_request_set_cmd(rq, fp->read_command ? : 2);
raw3270_request_set_idal(rq, ib);
wait_event(fp->attn_wait, fp->attention);
rc = fs3270_do_io(&fp->view, rq);
if (rc == 0 && idal_buffer_to_user(ib, data, count))
rc = -EFAULT;
rc = wait_event_interruptible(fp->wait, fp->attention);
fp->attention = 0;
if (rc == 0) {
rc = fs3270_do_io(&fp->view, rq);
if (rc == 0) {
count -= rq->rescnt;
if (idal_buffer_to_user(ib, data, count) != 0)
rc = -EFAULT;
else
rc = count;
}
}
raw3270_request_free(rq);
} else
rc = PTR_ERR(rq);
@ -162,13 +288,13 @@ fs3270_write(struct file *filp, const char *data, size_t count, loff_t *off)
struct raw3270_request *rq;
struct idal_buffer *ib;
int write_command;
int rc;
ssize_t rc;
fp = filp->private_data;
if (!fp)
return -ENODEV;
ib = idal_buffer_alloc(count, 0);
if (!ib)
if (IS_ERR(ib))
return -ENOMEM;
rq = raw3270_request_alloc(0);
if (!IS_ERR(rq)) {
@ -179,6 +305,8 @@ fs3270_write(struct file *filp, const char *data, size_t count, loff_t *off)
raw3270_request_set_cmd(rq, write_command);
raw3270_request_set_idal(rq, ib);
rc = fs3270_do_io(&fp->view, rq);
if (rc == 0)
rc = count - rq->rescnt;
} else
rc = -EFAULT;
raw3270_request_free(rq);
@ -232,7 +360,7 @@ fs3270_ioctl(struct inode *inode, struct file *filp,
}
/*
* Allocate tty3270 structure.
* Allocate fs3270 structure.
*/
static struct fs3270 *
fs3270_alloc_view(void)
@ -243,8 +371,8 @@ fs3270_alloc_view(void)
if (!fp)
return ERR_PTR(-ENOMEM);
memset(fp, 0, sizeof(struct fs3270));
fp->clear = raw3270_request_alloc(0);
if (!IS_ERR(fp->clear)) {
fp->init = raw3270_request_alloc(0);
if (IS_ERR(fp->init)) {
kfree(fp);
return ERR_PTR(-ENOMEM);
}
@ -252,12 +380,17 @@ fs3270_alloc_view(void)
}
/*
* Free tty3270 structure.
* Free fs3270 structure.
*/
static void
fs3270_free_view(struct raw3270_view *view)
{
raw3270_request_free(((struct fs3270 *) view)->clear);
struct fs3270 *fp;
fp = (struct fs3270 *) view;
if (fp->rdbuf)
idal_buffer_free(fp->rdbuf);
raw3270_request_free(((struct fs3270 *) view)->init);
kfree(view);
}
@ -285,11 +418,20 @@ static int
fs3270_open(struct inode *inode, struct file *filp)
{
struct fs3270 *fp;
struct idal_buffer *ib;
int minor, rc;
if (imajor(filp->f_dentry->d_inode) != IBM_FS3270_MAJOR)
return -ENODEV;
minor = iminor(filp->f_dentry->d_inode);
/* Check for minor 0 multiplexer. */
if (minor == 0) {
if (!current->signal->tty)
return -ENODEV;
if (current->signal->tty->driver->major != IBM_TTY3270_MAJOR)
return -ENODEV;
minor = current->signal->tty->index + RAW3270_FIRSTMINOR;
}
/* Check if some other program is already using fullscreen mode. */
fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor);
if (!IS_ERR(fp)) {
@ -301,7 +443,7 @@ fs3270_open(struct inode *inode, struct file *filp)
if (IS_ERR(fp))
return PTR_ERR(fp);
init_waitqueue_head(&fp->attn_wait);
init_waitqueue_head(&fp->wait);
fp->fs_pid = current->pid;
rc = raw3270_add_view(&fp->view, &fs3270_fn, minor);
if (rc) {
@ -309,8 +451,18 @@ fs3270_open(struct inode *inode, struct file *filp)
return rc;
}
/* Allocate idal-buffer. */
ib = idal_buffer_alloc(2*fp->view.rows*fp->view.cols + 5, 0);
if (IS_ERR(ib)) {
raw3270_put_view(&fp->view);
raw3270_del_view(&fp->view);
return PTR_ERR(fp);
}
fp->rdbuf = ib;
rc = raw3270_activate_view(&fp->view);
if (rc) {
raw3270_put_view(&fp->view);
raw3270_del_view(&fp->view);
return rc;
}
@ -329,8 +481,12 @@ fs3270_close(struct inode *inode, struct file *filp)
fp = filp->private_data;
filp->private_data = 0;
if (fp)
if (fp) {
fp->fs_pid = 0;
raw3270_reset(&fp->view);
raw3270_put_view(&fp->view);
raw3270_del_view(&fp->view);
}
return 0;
}

100
drivers/s390/char/raw3270.c
Просмотреть файл

@ -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);

7
drivers/s390/char/raw3270.h
Просмотреть файл

@ -21,6 +21,7 @@
/* Local Channel Commands */
#define TC_WRITE 0x01 /* Write */
#define TC_RDBUF 0x02 /* Read Buffer */
#define TC_EWRITE 0x05 /* Erase write */
#define TC_READMOD 0x06 /* Read modified */
#define TC_EWRITEA 0x0d /* Erase write alternate */
@ -76,7 +77,8 @@
#define TW_KR 0xc2 /* Keyboard restore */
#define TW_PLUSALARM 0x04 /* Add this bit for alarm */
#define RAW3270_MAXDEVS 256
#define RAW3270_FIRSTMINOR 1 /* First minor number */
#define RAW3270_MAXDEVS 255 /* Max number of 3270 devices */
/* For TUBGETMOD and TUBSETMOD. Should include. */
struct raw3270_iocb {
@ -166,7 +168,10 @@ void raw3270_del_view(struct raw3270_view *);
void raw3270_deactivate_view(struct raw3270_view *);
struct raw3270_view *raw3270_find_view(struct raw3270_fn *, int);
int raw3270_start(struct raw3270_view *, struct raw3270_request *);
int raw3270_start_locked(struct raw3270_view *, struct raw3270_request *);
int raw3270_start_irq(struct raw3270_view *, struct raw3270_request *);
int raw3270_reset(struct raw3270_view *);
struct raw3270_view *raw3270_view(struct raw3270_view *);
/* Reference count inliner for view structures. */
static inline void

27
drivers/s390/char/tty3270.c
Просмотреть файл

@ -653,18 +653,12 @@ tty3270_activate(struct raw3270_view *view)
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
spin_unlock_irqrestore(&tp->view.lock, flags);
start_tty(tp->tty);
return 0;
}
static void
tty3270_deactivate(struct raw3270_view *view)
{
struct tty3270 *tp;
tp = (struct tty3270 *) view;
if (tp && tp->tty)
stop_tty(tp->tty);
}
static int
@ -716,13 +710,13 @@ tty3270_alloc_view(void)
tp->freemem_pages[pages], PAGE_SIZE);
}
tp->write = raw3270_request_alloc(TTY3270_OUTPUT_BUFFER_SIZE);
if (!tp->write)
if (IS_ERR(tp->write))
goto out_pages;
tp->read = raw3270_request_alloc(0);
if (!tp->read)
if (IS_ERR(tp->read))
goto out_write;
tp->kreset = raw3270_request_alloc(1);
if (!tp->kreset)
if (IS_ERR(tp->kreset))
goto out_read;
tp->kbd = kbd_alloc();
if (!tp->kbd)
@ -845,7 +839,8 @@ tty3270_del_views(void)
int i;
for (i = 0; i < tty3270_max_index; i++) {
tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, i);
tp = (struct tty3270 *)
raw3270_find_view(&tty3270_fn, i + RAW3270_FIRSTMINOR);
if (!IS_ERR(tp))
raw3270_del_view(&tp->view);
}
@ -871,7 +866,9 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
if (tty->count > 1)
return 0;
/* Check if the tty3270 is already there. */
tp = (struct tty3270 *) raw3270_find_view(&tty3270_fn, tty->index);
tp = (struct tty3270 *)
raw3270_find_view(&tty3270_fn,
tty->index + RAW3270_FIRSTMINOR);
if (!IS_ERR(tp)) {
tty->driver_data = tp;
tty->winsize.ws_row = tp->view.rows - 2;
@ -903,7 +900,8 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
(void (*)(unsigned long)) tty3270_read_tasklet,
(unsigned long) tp->read);
rc = raw3270_add_view(&tp->view, &tty3270_fn, tty->index);
rc = raw3270_add_view(&tp->view, &tty3270_fn,
tty->index + RAW3270_FIRSTMINOR);
if (rc) {
tty3270_free_view(tp);
return rc;
@ -911,8 +909,8 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
rc = tty3270_alloc_screen(tp);
if (rc) {
raw3270_del_view(&tp->view);
raw3270_put_view(&tp->view);
raw3270_del_view(&tp->view);
return rc;
}
@ -1780,7 +1778,7 @@ tty3270_init(void)
struct tty_driver *driver;
int ret;
driver = alloc_tty_driver(256);
driver = alloc_tty_driver(RAW3270_MAXDEVS);
if (!driver)
return -ENOMEM;
@ -1794,6 +1792,7 @@ tty3270_init(void)
driver->driver_name = "ttyTUB";
driver->name = "ttyTUB";
driver->major = IBM_TTY3270_MAJOR;
driver->minor_start = RAW3270_FIRSTMINOR;
driver->type = TTY_DRIVER_TYPE_SYSTEM;
driver->subtype = SYSTEM_TYPE_TTY;
driver->init_termios = tty_std_termios;