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/* SPDX-License-Identifier: GPL-2.0 */
/*
* IBM/3270 Driver
*
* 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 <uapi/asm/raw3270.h>
#include <asm/idals.h>
#include <asm/ioctl.h>
struct raw3270;
struct raw3270_view;
extern struct class *class3270;
/* 3270 CCW request */
struct raw3270_request {
struct list_head list; /* list head for request queueing. */
struct raw3270_view *view; /* view of this request */
struct ccw1 ccw; /* single ccw. */
void *buffer; /* output buffer. */
size_t size; /* size of output buffer. */
int rescnt; /* residual count from devstat. */
int rc; /* return code for this request. */
/* Callback for delivering final status. */
void (*callback)(struct raw3270_request *rq, void *data);
void *callback_data;
};
struct raw3270_request *raw3270_request_alloc(size_t size);
void raw3270_request_free(struct raw3270_request *rq);
int raw3270_request_reset(struct raw3270_request *rq);
void raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd);
int raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size);
void raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size);
void raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib);
static inline int
raw3270_request_final(struct raw3270_request *rq)
{
return list_empty(&rq->list);
}
void raw3270_buffer_address(struct raw3270 *, char *, int, int);
/*
* Functions of a 3270 view.
*/
struct raw3270_fn {
int (*activate)(struct raw3270_view *rq);
void (*deactivate)(struct raw3270_view *rq);
void (*intv)(struct raw3270_view *view,
struct raw3270_request *rq, struct irb *ib);
void (*release)(struct raw3270_view *view);
void (*free)(struct raw3270_view *view);
void (*resize)(struct raw3270_view *view,
int new_model, int new_cols, int new_rows,
int old_model, int old_cols, int old_rows);
};
/*
* View structure chaining. The raw3270_view structure is meant to
* be embedded at the start of the real view data structure, e.g.:
* struct example {
* struct raw3270_view view;
* ...
* };
*/
struct raw3270_view {
struct list_head list;
spinlock_t lock; /* protects members of view */
#define RAW3270_VIEW_LOCK_IRQ 0
#define RAW3270_VIEW_LOCK_BH 1
atomic_t ref_count;
struct raw3270 *dev;
struct raw3270_fn *fn;
unsigned int model;
unsigned int rows, cols; /* # of rows & colums of the view */
unsigned char *ascebc; /* ascii -> ebcdic table */
};
int raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor, int subclass);
int raw3270_view_lock_unavailable(struct raw3270_view *view);
int raw3270_activate_view(struct raw3270_view *view);
void raw3270_del_view(struct raw3270_view *view);
void raw3270_deactivate_view(struct raw3270_view *view);
struct raw3270_view *raw3270_find_view(struct raw3270_fn *fn, int minor);
int raw3270_start(struct raw3270_view *view, struct raw3270_request *rq);
int raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq);
int raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq);
int raw3270_reset(struct raw3270_view *view);
struct raw3270_view *raw3270_view(struct raw3270_view *view);
int raw3270_view_active(struct raw3270_view *view);
int raw3270_start_request(struct raw3270_view *view, struct raw3270_request *rq,
int cmd, void *data, size_t len);
void raw3270_read_modified_cb(struct raw3270_request *rq, void *data);
/* Reference count inliner for view structures. */
static inline void
raw3270_get_view(struct raw3270_view *view)
{
atomic_inc(&view->ref_count);
}
extern wait_queue_head_t raw3270_wait_queue;
static inline void
raw3270_put_view(struct raw3270_view *view)
{
if (atomic_dec_return(&view->ref_count) == 0)
wake_up(&raw3270_wait_queue);
}
struct raw3270 *raw3270_setup_console(void);
void raw3270_wait_cons_dev(struct raw3270 *rp);
/* Notifier for device addition/removal */
struct raw3270_notifier {
struct list_head list;
void (*create)(int minor);
void (*destroy)(int minor);
};
int raw3270_register_notifier(struct raw3270_notifier *notifier);
void raw3270_unregister_notifier(struct raw3270_notifier *notifier);
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