285 lines
8.0 KiB
C
285 lines
8.0 KiB
C
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/* 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 <asm/idals.h>
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#include <asm/ioctl.h>
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/* ioctls for fullscreen 3270 */
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#define TUBICMD _IO('3', 3) /* set ccw command for fs reads. */
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#define TUBOCMD _IO('3', 4) /* set ccw command for fs writes. */
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#define TUBGETI _IO('3', 7) /* get ccw command for fs reads. */
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#define TUBGETO _IO('3', 8) /* get ccw command for fs writes. */
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#define TUBSETMOD _IO('3',12) /* FIXME: what does it do ?*/
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#define TUBGETMOD _IO('3',13) /* FIXME: what does it do ?*/
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/* Local Channel Commands */
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#define TC_WRITE 0x01 /* Write */
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#define TC_RDBUF 0x02 /* Read Buffer */
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#define TC_EWRITE 0x05 /* Erase write */
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#define TC_READMOD 0x06 /* Read modified */
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#define TC_EWRITEA 0x0d /* Erase write alternate */
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#define TC_WRITESF 0x11 /* Write structured field */
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/* Buffer Control Orders */
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#define TO_SF 0x1d /* Start field */
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#define TO_SBA 0x11 /* Set buffer address */
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#define TO_IC 0x13 /* Insert cursor */
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#define TO_PT 0x05 /* Program tab */
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#define TO_RA 0x3c /* Repeat to address */
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#define TO_SFE 0x29 /* Start field extended */
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#define TO_EUA 0x12 /* Erase unprotected to address */
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#define TO_MF 0x2c /* Modify field */
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#define TO_SA 0x28 /* Set attribute */
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/* Field Attribute Bytes */
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#define TF_INPUT 0x40 /* Visible input */
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#define TF_INPUTN 0x4c /* Invisible input */
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#define TF_INMDT 0xc1 /* Visible, Set-MDT */
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#define TF_LOG 0x60
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/* Character Attribute Bytes */
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#define TAT_RESET 0x00
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#define TAT_FIELD 0xc0
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#define TAT_EXTHI 0x41
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#define TAT_COLOR 0x42
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#define TAT_CHARS 0x43
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#define TAT_TRANS 0x46
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/* Extended-Highlighting Bytes */
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#define TAX_RESET 0x00
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#define TAX_BLINK 0xf1
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#define TAX_REVER 0xf2
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#define TAX_UNDER 0xf4
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/* Reset value */
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#define TAR_RESET 0x00
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/* Color values */
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#define TAC_RESET 0x00
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#define TAC_BLUE 0xf1
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#define TAC_RED 0xf2
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#define TAC_PINK 0xf3
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#define TAC_GREEN 0xf4
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#define TAC_TURQ 0xf5
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#define TAC_YELLOW 0xf6
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#define TAC_WHITE 0xf7
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#define TAC_DEFAULT 0x00
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/* Write Control Characters */
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#define TW_NONE 0x40 /* No particular action */
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#define TW_KR 0xc2 /* Keyboard restore */
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#define TW_PLUSALARM 0x04 /* Add this bit for alarm */
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#define RAW3270_FIRSTMINOR 1 /* First minor number */
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#define RAW3270_MAXDEVS 255 /* Max number of 3270 devices */
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/* For TUBGETMOD and TUBSETMOD. Should include. */
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struct raw3270_iocb {
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short model;
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short line_cnt;
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short col_cnt;
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short pf_cnt;
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short re_cnt;
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short map;
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};
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struct raw3270;
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struct raw3270_view;
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extern 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 *, void *);
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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 *);
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void raw3270_request_reset(struct raw3270_request *);
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void raw3270_request_set_cmd(struct raw3270_request *, u8 cmd);
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int raw3270_request_add_data(struct raw3270_request *, void *, size_t);
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void raw3270_request_set_data(struct raw3270_request *, void *, size_t);
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void raw3270_request_set_idal(struct raw3270_request *, struct idal_buffer *);
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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 *, unsigned short);
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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 *);
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void (*deactivate)(struct raw3270_view *);
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void (*intv)(struct raw3270_view *,
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struct raw3270_request *, struct irb *);
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void (*release)(struct raw3270_view *);
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void (*free)(struct raw3270_view *);
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void (*resize)(struct raw3270_view *, int, int, int);
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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;
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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 *, struct raw3270_fn *, int, int);
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int raw3270_view_lock_unavailable(struct raw3270_view *view);
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int raw3270_activate_view(struct raw3270_view *);
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void raw3270_del_view(struct raw3270_view *);
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void raw3270_deactivate_view(struct raw3270_view *);
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struct raw3270_view *raw3270_find_view(struct raw3270_fn *, int);
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int raw3270_start(struct raw3270_view *, struct raw3270_request *);
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int raw3270_start_locked(struct raw3270_view *, struct raw3270_request *);
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int raw3270_start_irq(struct raw3270_view *, struct raw3270_request *);
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int raw3270_reset(struct raw3270_view *);
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struct raw3270_view *raw3270_view(struct raw3270_view *);
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int raw3270_view_active(struct raw3270_view *);
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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 *);
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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 *);
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void raw3270_unregister_notifier(struct raw3270_notifier *);
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/*
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* Little memory allocator for string objects.
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*/
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struct string
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{
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struct list_head list;
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struct list_head update;
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unsigned long size;
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unsigned long len;
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char string[];
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} __attribute__ ((aligned(8)));
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static inline struct string *
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alloc_string(struct list_head *free_list, unsigned long len)
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{
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struct string *cs, *tmp;
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unsigned long size;
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size = (len + 7L) & -8L;
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list_for_each_entry(cs, free_list, list) {
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if (cs->size < size)
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continue;
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if (cs->size > size + sizeof(struct string)) {
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char *endaddr = (char *) (cs + 1) + cs->size;
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tmp = (struct string *) (endaddr - size) - 1;
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tmp->size = size;
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cs->size -= size + sizeof(struct string);
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cs = tmp;
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} else
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list_del(&cs->list);
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cs->len = len;
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INIT_LIST_HEAD(&cs->list);
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INIT_LIST_HEAD(&cs->update);
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return cs;
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}
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return NULL;
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}
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static inline unsigned long
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free_string(struct list_head *free_list, struct string *cs)
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{
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struct string *tmp;
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struct list_head *p, *left;
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/* Find out the left neighbour in free memory list. */
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left = free_list;
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list_for_each(p, free_list) {
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if (list_entry(p, struct string, list) > cs)
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break;
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left = p;
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}
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/* Try to merge with right neighbour = next element from left. */
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if (left->next != free_list) {
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tmp = list_entry(left->next, struct string, list);
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if ((char *) (cs + 1) + cs->size == (char *) tmp) {
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list_del(&tmp->list);
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cs->size += tmp->size + sizeof(struct string);
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}
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}
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/* Try to merge with left neighbour. */
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if (left != free_list) {
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tmp = list_entry(left, struct string, list);
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if ((char *) (tmp + 1) + tmp->size == (char *) cs) {
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tmp->size += cs->size + sizeof(struct string);
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return tmp->size;
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}
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}
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__list_add(&cs->list, left, left->next);
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return cs->size;
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}
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static inline void
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add_string_memory(struct list_head *free_list, void *mem, unsigned long size)
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{
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struct string *cs;
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cs = (struct string *) mem;
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cs->size = size - sizeof(struct string);
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free_string(free_list, cs);
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}
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