diff options
Diffstat (limited to 'drivers/s390/char/raw3270.h')
| -rw-r--r-- | drivers/s390/char/raw3270.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/s390/char/raw3270.h b/drivers/s390/char/raw3270.h new file mode 100644 index 0000000000..b1beecc7a0 --- /dev/null +++ b/drivers/s390/char/raw3270.h @@ -0,0 +1,129 @@ +/* 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); |