Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 285 insertions, 0 deletions

diff --git a/drivers/s390/char/raw3270.h b/drivers/s390/char/raw3270.h
new file mode 100644
index 000000000..3afaa35f7
--- /dev/null
+++ b/drivers/s390/char/raw3270.h
@@ -0,0 +1,285 @@
+/* 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);
+struct raw3270_request *raw3270_request_alloc_bootmem(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 *);
+void raw3270_pm_unfreeze(struct raw3270_view *);
+
+/*
+ * Little memory allocator for string objects. 
+ */
+struct string
+{
+	struct list_head list;
+	struct list_head update;
+	unsigned long size;
+	unsigned long len;
+	char string[0];
+} __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);
+}
+