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69460c5e6b
Since commit 43a7206b09 ("driver core: class: make class_register() take
a const *"), the driver core allows for struct class to be in read-only
memory, so move the class3270 structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at boot time.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: "Ricardo B. Marliere" <ricardo@marliere.net>
Link: https://lore.kernel.org/r/20240305-class_cleanup-s390-v1-6-c4ff1ec49ffd@marliere.net
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
130 lines
4.2 KiB
C
130 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* IBM/3270 Driver
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*
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* Author(s):
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* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
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* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Copyright IBM Corp. 2003, 2009
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*/
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#include <uapi/asm/raw3270.h>
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#include <asm/idals.h>
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#include <asm/ioctl.h>
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struct raw3270;
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struct raw3270_view;
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extern const struct class class3270;
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/* 3270 CCW request */
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struct raw3270_request {
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struct list_head list; /* list head for request queueing. */
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struct raw3270_view *view; /* view of this request */
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struct ccw1 ccw; /* single ccw. */
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void *buffer; /* output buffer. */
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size_t size; /* size of output buffer. */
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int rescnt; /* residual count from devstat. */
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int rc; /* return code for this request. */
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/* Callback for delivering final status. */
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void (*callback)(struct raw3270_request *rq, void *data);
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void *callback_data;
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};
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struct raw3270_request *raw3270_request_alloc(size_t size);
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void raw3270_request_free(struct raw3270_request *rq);
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int raw3270_request_reset(struct raw3270_request *rq);
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void raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd);
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int raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size);
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void raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size);
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void raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib);
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static inline int
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raw3270_request_final(struct raw3270_request *rq)
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{
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return list_empty(&rq->list);
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}
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void raw3270_buffer_address(struct raw3270 *, char *, int, int);
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/*
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* Functions of a 3270 view.
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*/
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struct raw3270_fn {
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int (*activate)(struct raw3270_view *rq);
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void (*deactivate)(struct raw3270_view *rq);
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void (*intv)(struct raw3270_view *view,
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struct raw3270_request *rq, struct irb *ib);
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void (*release)(struct raw3270_view *view);
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void (*free)(struct raw3270_view *view);
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void (*resize)(struct raw3270_view *view,
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int new_model, int new_cols, int new_rows,
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int old_model, int old_cols, int old_rows);
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};
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/*
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* View structure chaining. The raw3270_view structure is meant to
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* be embedded at the start of the real view data structure, e.g.:
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* struct example {
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* struct raw3270_view view;
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* ...
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* };
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*/
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struct raw3270_view {
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struct list_head list;
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spinlock_t lock; /* protects members of view */
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#define RAW3270_VIEW_LOCK_IRQ 0
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#define RAW3270_VIEW_LOCK_BH 1
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atomic_t ref_count;
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struct raw3270 *dev;
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struct raw3270_fn *fn;
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unsigned int model;
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unsigned int rows, cols; /* # of rows & colums of the view */
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unsigned char *ascebc; /* ascii -> ebcdic table */
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};
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int raw3270_add_view(struct raw3270_view *view, struct raw3270_fn *fn, int minor, int subclass);
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int raw3270_view_lock_unavailable(struct raw3270_view *view);
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int raw3270_activate_view(struct raw3270_view *view);
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void raw3270_del_view(struct raw3270_view *view);
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void raw3270_deactivate_view(struct raw3270_view *view);
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struct raw3270_view *raw3270_find_view(struct raw3270_fn *fn, int minor);
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int raw3270_start(struct raw3270_view *view, struct raw3270_request *rq);
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int raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq);
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int raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq);
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int raw3270_reset(struct raw3270_view *view);
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struct raw3270_view *raw3270_view(struct raw3270_view *view);
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int raw3270_view_active(struct raw3270_view *view);
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int raw3270_start_request(struct raw3270_view *view, struct raw3270_request *rq,
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int cmd, void *data, size_t len);
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void raw3270_read_modified_cb(struct raw3270_request *rq, void *data);
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/* Reference count inliner for view structures. */
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static inline void
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raw3270_get_view(struct raw3270_view *view)
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{
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atomic_inc(&view->ref_count);
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}
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extern wait_queue_head_t raw3270_wait_queue;
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static inline void
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raw3270_put_view(struct raw3270_view *view)
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{
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if (atomic_dec_return(&view->ref_count) == 0)
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wake_up(&raw3270_wait_queue);
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}
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struct raw3270 *raw3270_setup_console(void);
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void raw3270_wait_cons_dev(struct raw3270 *rp);
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/* Notifier for device addition/removal */
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struct raw3270_notifier {
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struct list_head list;
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void (*create)(int minor);
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void (*destroy)(int minor);
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};
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int raw3270_register_notifier(struct raw3270_notifier *notifier);
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void raw3270_unregister_notifier(struct raw3270_notifier *notifier);
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