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Commit ed3cb6f0 authored by Richard Hitt's avatar Richard Hitt Committed by Linus Torvalds
Browse files

[PATCH] s390: 3270 fullscreen view 



      Martin Schwidefsky <schwidefsky@de.ibm.com>

Fix fullscreen view of the 3270 device driver.

Signed-off-by: default avatarRichard Hitt <rbh00@utsglobal.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d89ea9b8

arch/s390/kernel/compat_ioctl.c

+9 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/s390/char/con3270.c

+4 −3
Original line number Diff line number Diff line
@@ -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++) {

drivers/s390/char/fs3270.c

+195 −39
Original line number Diff line number Diff line
@@ -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;

	rq->callback_data = &fp->wait;



	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)

		return rc;

		if (rc == 0) {

			/* Started sucessfully. Now wait for completion. */

	wait_event(wq, raw3270_request_final(rq));

	return rq->rc;

			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);

}



/*

 * Switch to the fullscreen view.

 */

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 = wait_event_interruptible(fp->wait, fp->attention);

		fp->attention = 0;

		if (rc == 0) {

			rc = fs3270_do_io(&fp->view, rq);

		if (rc == 0 && idal_buffer_to_user(ib, data, count))

			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;

}

drivers/s390/char/raw3270.c

+88 −12
Original line number Diff line number Diff line
@@ -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);

	}
@@ -941,10 +982,11 @@ 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) {

			list_for_each_entry(view, &rp->view_list, list) {

				rp->view = view;

				if (view->fn->activate(view) == 0)

					break;

				rp->view = 0;

			}

		}

	}
@@ -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);

drivers/s390/char/raw3270.h

+6 −1
Original line number Diff line number Diff line
@@ -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