summaryrefslogtreecommitdiffstats
path: root/drivers/s390/char/raw3270.h
blob: c6645167cd2bf2ae2d84d15fe27e6f1391dbb774 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
/* 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 <asm/idals.h>
#include <asm/ioctl.h>

/* ioctls for fullscreen 3270 */
#define TUBICMD		_IO('3', 3)	/* set ccw command for fs reads. */
#define TUBOCMD		_IO('3', 4)	/* set ccw command for fs writes. */
#define TUBGETI		_IO('3', 7)	/* get ccw command for fs reads. */
#define TUBGETO		_IO('3', 8)	/* get ccw command for fs writes. */
#define TUBSETMOD	_IO('3',12)	/* FIXME: what does it do ?*/
#define TUBGETMOD	_IO('3',13)	/* FIXME: what does it do ?*/

/* 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 */
#define TC_WRITESF	0x11		/* Write structured field */

/* Buffer Control Orders */
#define TO_SF		0x1d		/* Start field */
#define TO_SBA		0x11		/* Set buffer address */
#define TO_IC		0x13		/* Insert cursor */
#define TO_PT		0x05		/* Program tab */
#define TO_RA		0x3c		/* Repeat to address */
#define TO_SFE		0x29		/* Start field extended */
#define TO_EUA		0x12		/* Erase unprotected to address */
#define TO_MF		0x2c		/* Modify field */
#define TO_SA		0x28		/* Set attribute */

/* Field Attribute Bytes */
#define TF_INPUT	0x40		/* Visible input */
#define TF_INPUTN	0x4c		/* Invisible input */
#define TF_INMDT	0xc1		/* Visible, Set-MDT */
#define TF_LOG		0x60

/* Character Attribute Bytes */
#define TAT_RESET	0x00
#define TAT_FIELD	0xc0
#define TAT_EXTHI	0x41
#define TAT_COLOR	0x42
#define TAT_CHARS	0x43
#define TAT_TRANS	0x46

/* Extended-Highlighting Bytes */
#define TAX_RESET	0x00
#define TAX_BLINK	0xf1
#define TAX_REVER	0xf2
#define TAX_UNDER	0xf4

/* Reset value */
#define TAR_RESET	0x00

/* Color values */
#define TAC_RESET	0x00
#define TAC_BLUE	0xf1
#define TAC_RED		0xf2
#define TAC_PINK	0xf3
#define TAC_GREEN	0xf4
#define TAC_TURQ	0xf5
#define TAC_YELLOW	0xf6
#define TAC_WHITE	0xf7
#define TAC_DEFAULT	0x00

/* Write Control Characters */
#define TW_NONE		0x40		/* No particular action */
#define TW_KR		0xc2		/* Keyboard restore */
#define TW_PLUSALARM	0x04		/* Add this bit for alarm */

#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 {
	short model;
	short line_cnt;
	short col_cnt;
	short pf_cnt;
	short re_cnt;
	short map;
};

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 *, void *);
	void *callback_data;
};

struct raw3270_request *raw3270_request_alloc(size_t size);
void raw3270_request_free(struct raw3270_request *);
void raw3270_request_reset(struct raw3270_request *);
void raw3270_request_set_cmd(struct raw3270_request *, u8 cmd);
int  raw3270_request_add_data(struct raw3270_request *, void *, size_t);
void raw3270_request_set_data(struct raw3270_request *, void *, size_t);
void raw3270_request_set_idal(struct raw3270_request *, struct idal_buffer *);

static inline int
raw3270_request_final(struct raw3270_request *rq)
{
	return list_empty(&rq->list);
}

void raw3270_buffer_address(struct raw3270 *, char *, unsigned short);

/*
 * Functions of a 3270 view.
 */
struct raw3270_fn {
	int  (*activate)(struct raw3270_view *);
	void (*deactivate)(struct raw3270_view *);
	void (*intv)(struct raw3270_view *,
		     struct raw3270_request *, struct irb *);
	void (*release)(struct raw3270_view *);
	void (*free)(struct raw3270_view *);
	void (*resize)(struct raw3270_view *, int, int, int);
};

/*
 * 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;
#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 *, struct raw3270_fn *, int, int);
int raw3270_activate_view(struct raw3270_view *);
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 *);
int raw3270_view_active(struct raw3270_view *);

/* 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 *);

/* 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 *);
void raw3270_unregister_notifier(struct raw3270_notifier *);

/*
 * Little memory allocator for string objects. 
 */
struct string
{
	struct list_head list;
	struct list_head update;
	unsigned long size;
	unsigned long len;
	char string[];
} __attribute__ ((aligned(8)));

static inline struct string *
alloc_string(struct list_head *free_list, unsigned long len)
{
	struct string *cs, *tmp;
	unsigned long size;

	size = (len + 7L) & -8L;
	list_for_each_entry(cs, free_list, list) {
		if (cs->size < size)
			continue;
		if (cs->size > size + sizeof(struct string)) {
			char *endaddr = (char *) (cs + 1) + cs->size;
			tmp = (struct string *) (endaddr - size) - 1;
			tmp->size = size;
			cs->size -= size + sizeof(struct string);
			cs = tmp;
		} else
			list_del(&cs->list);
		cs->len = len;
		INIT_LIST_HEAD(&cs->list);
		INIT_LIST_HEAD(&cs->update);
		return cs;
	}
	return NULL;
}

static inline unsigned long
free_string(struct list_head *free_list, struct string *cs)
{
	struct string *tmp;
	struct list_head *p, *left;

	/* Find out the left neighbour in free memory list. */
	left = free_list;
	list_for_each(p, free_list) {
		if (list_entry(p, struct string, list) > cs)
			break;
		left = p;
	}
	/* Try to merge with right neighbour = next element from left. */
	if (left->next != free_list) {
		tmp = list_entry(left->next, struct string, list);
		if ((char *) (cs + 1) + cs->size == (char *) tmp) {
			list_del(&tmp->list);
			cs->size += tmp->size + sizeof(struct string);
		}
	}
	/* Try to merge with left neighbour. */
	if (left != free_list) {
		tmp = list_entry(left, struct string, list);
		if ((char *) (tmp + 1) + tmp->size == (char *) cs) {
			tmp->size += cs->size + sizeof(struct string);
			return tmp->size;
		}
	}
	__list_add(&cs->list, left, left->next);
	return cs->size;
}

static inline void
add_string_memory(struct list_head *free_list, void *mem, unsigned long size)
{
	struct string *cs;

	cs = (struct string *) mem;
	cs->size = size - sizeof(struct string);
	free_string(free_list, cs);
}