aboutsummaryrefslogtreecommitdiff
path: root/drivers/s390/char/tty3270.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/char/tty3270.c')
-rw-r--r--drivers/s390/char/tty3270.c121
1 files changed, 56 insertions, 65 deletions
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index b43445a55cb..10ec690197c 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -61,7 +61,7 @@ struct tty3270_line {
*/
struct tty3270 {
struct raw3270_view view;
- struct tty_struct *tty; /* Pointer to tty structure */
+ struct tty_port port;
void **freemem_pages; /* Array of pages used for freemem. */
struct list_head freemem; /* List of free memory for strings. */
@@ -324,9 +324,8 @@ tty3270_blank_line(struct tty3270 *tp)
static void
tty3270_write_callback(struct raw3270_request *rq, void *data)
{
- struct tty3270 *tp;
+ struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
- tp = (struct tty3270 *) rq->view;
if (rq->rc != 0) {
/* Write wasn't successful. Refresh all. */
tp->update_flags = TTY_UPDATE_ALL;
@@ -450,10 +449,9 @@ tty3270_rcl_add(struct tty3270 *tp, char *input, int len)
static void
tty3270_rcl_backward(struct kbd_data *kbd)
{
- struct tty3270 *tp;
+ struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
struct string *s;
- tp = kbd->tty->driver_data;
spin_lock_bh(&tp->view.lock);
if (tp->inattr == TF_INPUT) {
if (tp->rcl_walk && tp->rcl_walk->prev != &tp->rcl_lines)
@@ -478,9 +476,8 @@ tty3270_rcl_backward(struct kbd_data *kbd)
static void
tty3270_exit_tty(struct kbd_data *kbd)
{
- struct tty3270 *tp;
+ struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
- tp = kbd->tty->driver_data;
raw3270_deactivate_view(&tp->view);
}
@@ -490,10 +487,9 @@ tty3270_exit_tty(struct kbd_data *kbd)
static void
tty3270_scroll_forward(struct kbd_data *kbd)
{
- struct tty3270 *tp;
+ struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
int nr_up;
- tp = kbd->tty->driver_data;
spin_lock_bh(&tp->view.lock);
nr_up = tp->nr_up - tp->view.rows + 2;
if (nr_up < 0)
@@ -513,10 +509,9 @@ tty3270_scroll_forward(struct kbd_data *kbd)
static void
tty3270_scroll_backward(struct kbd_data *kbd)
{
- struct tty3270 *tp;
+ struct tty3270 *tp = container_of(kbd->port, struct tty3270, port);
int nr_up;
- tp = kbd->tty->driver_data;
spin_lock_bh(&tp->view.lock);
nr_up = tp->nr_up + tp->view.rows - 2;
if (nr_up + tp->view.rows - 2 > tp->nr_lines)
@@ -537,11 +532,10 @@ static void
tty3270_read_tasklet(struct raw3270_request *rrq)
{
static char kreset_data = TW_KR;
- struct tty3270 *tp;
+ struct tty3270 *tp = container_of(rrq->view, struct tty3270, view);
char *input;
int len;
- tp = (struct tty3270 *) rrq->view;
spin_lock_bh(&tp->view.lock);
/*
* Two AID keys are special: For 0x7d (enter) the input line
@@ -577,13 +571,10 @@ tty3270_read_tasklet(struct raw3270_request *rrq)
raw3270_request_add_data(tp->kreset, &kreset_data, 1);
raw3270_start(&tp->view, tp->kreset);
- /* Emit input string. */
- if (tp->tty) {
- while (len-- > 0)
- kbd_keycode(tp->kbd, *input++);
- /* Emit keycode for AID byte. */
- kbd_keycode(tp->kbd, 256 + tp->input->string[0]);
- }
+ while (len-- > 0)
+ kbd_keycode(tp->kbd, *input++);
+ /* Emit keycode for AID byte. */
+ kbd_keycode(tp->kbd, 256 + tp->input->string[0]);
raw3270_request_reset(rrq);
xchg(&tp->read, rrq);
@@ -596,9 +587,10 @@ tty3270_read_tasklet(struct raw3270_request *rrq)
static void
tty3270_read_callback(struct raw3270_request *rq, void *data)
{
+ struct tty3270 *tp = container_of(rq->view, struct tty3270, view);
raw3270_get_view(rq->view);
/* Schedule tasklet to pass input to tty. */
- tasklet_schedule(&((struct tty3270 *) rq->view)->readlet);
+ tasklet_schedule(&tp->readlet);
}
/*
@@ -635,9 +627,8 @@ tty3270_issue_read(struct tty3270 *tp, int lock)
static int
tty3270_activate(struct raw3270_view *view)
{
- struct tty3270 *tp;
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
- tp = (struct tty3270 *) view;
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
return 0;
@@ -646,9 +637,8 @@ tty3270_activate(struct raw3270_view *view)
static void
tty3270_deactivate(struct raw3270_view *view)
{
- struct tty3270 *tp;
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
- tp = (struct tty3270 *) view;
del_timer(&tp->timer);
}
@@ -690,6 +680,17 @@ tty3270_alloc_view(void)
if (!tp->freemem_pages)
goto out_tp;
INIT_LIST_HEAD(&tp->freemem);
+ INIT_LIST_HEAD(&tp->lines);
+ INIT_LIST_HEAD(&tp->update);
+ INIT_LIST_HEAD(&tp->rcl_lines);
+ tp->rcl_max = 20;
+ tty_port_init(&tp->port);
+ setup_timer(&tp->timer, (void (*)(unsigned long)) tty3270_update,
+ (unsigned long) tp);
+ tasklet_init(&tp->readlet,
+ (void (*)(unsigned long)) tty3270_read_tasklet,
+ (unsigned long) tp->read);
+
for (pages = 0; pages < TTY3270_STRING_PAGES; pages++) {
tp->freemem_pages[pages] = (void *)
__get_free_pages(GFP_KERNEL|GFP_DMA, 0);
@@ -794,16 +795,15 @@ tty3270_free_screen(struct tty3270 *tp)
static void
tty3270_release(struct raw3270_view *view)
{
- struct tty3270 *tp;
- struct tty_struct *tty;
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
+ struct tty_struct *tty = tty_port_tty_get(&tp->port);
- tp = (struct tty3270 *) view;
- tty = tp->tty;
if (tty) {
tty->driver_data = NULL;
- tp->tty = tp->kbd->tty = NULL;
+ tty_port_tty_set(&tp->port, NULL);
tty_hangup(tty);
raw3270_put_view(&tp->view);
+ tty_kref_put(tty);
}
}
@@ -813,8 +813,9 @@ tty3270_release(struct raw3270_view *view)
static void
tty3270_free(struct raw3270_view *view)
{
- tty3270_free_screen((struct tty3270 *) view);
- tty3270_free_view((struct tty3270 *) view);
+ struct tty3270 *tp = container_of(view, struct tty3270, view);
+ tty3270_free_screen(tp);
+ tty3270_free_view(tp);
}
/*
@@ -823,14 +824,13 @@ tty3270_free(struct raw3270_view *view)
static void
tty3270_del_views(void)
{
- struct tty3270 *tp;
int i;
for (i = 0; i < tty3270_max_index; i++) {
- tp = (struct tty3270 *)
+ struct raw3270_view *view =
raw3270_find_view(&tty3270_fn, i + RAW3270_FIRSTMINOR);
- if (!IS_ERR(tp))
- raw3270_del_view(&tp->view);
+ if (!IS_ERR(view))
+ raw3270_del_view(view);
}
}
@@ -848,22 +848,23 @@ static struct raw3270_fn tty3270_fn = {
static int
tty3270_open(struct tty_struct *tty, struct file * filp)
{
+ struct raw3270_view *view;
struct tty3270 *tp;
int i, rc;
if (tty->count > 1)
return 0;
/* Check if the tty3270 is already there. */
- tp = (struct tty3270 *)
- raw3270_find_view(&tty3270_fn,
+ view = raw3270_find_view(&tty3270_fn,
tty->index + RAW3270_FIRSTMINOR);
- if (!IS_ERR(tp)) {
+ if (!IS_ERR(view)) {
+ tp = container_of(view, struct tty3270, view);
tty->driver_data = tp;
tty->winsize.ws_row = tp->view.rows - 2;
tty->winsize.ws_col = tp->view.cols;
tty->low_latency = 0;
- tp->tty = tty;
- tp->kbd->tty = tty;
+ /* why to reassign? */
+ tty_port_tty_set(&tp->port, tty);
tp->inattr = TF_INPUT;
return 0;
}
@@ -871,7 +872,7 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
tty3270_max_index = tty->index + 1;
/* Quick exit if there is no device for tty->index. */
- if (PTR_ERR(tp) == -ENODEV)
+ if (PTR_ERR(view) == -ENODEV)
return -ENODEV;
/* Allocate tty3270 structure on first open. */
@@ -879,16 +880,6 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
if (IS_ERR(tp))
return PTR_ERR(tp);
- INIT_LIST_HEAD(&tp->lines);
- INIT_LIST_HEAD(&tp->update);
- INIT_LIST_HEAD(&tp->rcl_lines);
- tp->rcl_max = 20;
- setup_timer(&tp->timer, (void (*)(unsigned long)) tty3270_update,
- (unsigned long) tp);
- tasklet_init(&tp->readlet,
- (void (*)(unsigned long)) tty3270_read_tasklet,
- (unsigned long) tp->read);
-
rc = raw3270_add_view(&tp->view, &tty3270_fn,
tty->index + RAW3270_FIRSTMINOR);
if (rc) {
@@ -903,7 +894,7 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
return rc;
}
- tp->tty = tty;
+ tty_port_tty_set(&tp->port, tty);
tty->low_latency = 0;
tty->driver_data = tp;
tty->winsize.ws_row = tp->view.rows - 2;
@@ -917,7 +908,7 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
for (i = 0; i < tp->view.rows - 2; i++)
tty3270_blank_line(tp);
- tp->kbd->tty = tty;
+ tp->kbd->port = &tp->port;
tp->kbd->fn_handler[KVAL(K_INCRCONSOLE)] = tty3270_exit_tty;
tp->kbd->fn_handler[KVAL(K_SCROLLBACK)] = tty3270_scroll_backward;
tp->kbd->fn_handler[KVAL(K_SCROLLFORW)] = tty3270_scroll_forward;
@@ -935,14 +926,13 @@ tty3270_open(struct tty_struct *tty, struct file * filp)
static void
tty3270_close(struct tty_struct *tty, struct file * filp)
{
- struct tty3270 *tp;
+ struct tty3270 *tp = tty->driver_data;
if (tty->count > 1)
return;
- tp = (struct tty3270 *) tty->driver_data;
if (tp) {
tty->driver_data = NULL;
- tp->tty = tp->kbd->tty = NULL;
+ tty_port_tty_set(&tp->port, NULL);
raw3270_put_view(&tp->view);
}
}
@@ -1391,7 +1381,7 @@ tty3270_escape_sequence(struct tty3270 *tp, char ch)
tty3270_lf(tp);
break;
case 'Z': /* Respond ID. */
- kbd_puts_queue(tp->tty, "\033[?6c");
+ kbd_puts_queue(&tp->port, "\033[?6c");
break;
case '7': /* Save cursor position. */
tp->saved_cx = tp->cx;
@@ -1437,11 +1427,11 @@ tty3270_escape_sequence(struct tty3270 *tp, char ch)
tp->esc_state = ESnormal;
if (ch == 'n' && !tp->esc_ques) {
if (tp->esc_par[0] == 5) /* Status report. */
- kbd_puts_queue(tp->tty, "\033[0n");
+ kbd_puts_queue(&tp->port, "\033[0n");
else if (tp->esc_par[0] == 6) { /* Cursor report. */
char buf[40];
sprintf(buf, "\033[%d;%dR", tp->cy + 1, tp->cx + 1);
- kbd_puts_queue(tp->tty, buf);
+ kbd_puts_queue(&tp->port, buf);
}
return;
}
@@ -1513,12 +1503,13 @@ tty3270_escape_sequence(struct tty3270 *tp, char ch)
* String write routine for 3270 ttys
*/
static void
-tty3270_do_write(struct tty3270 *tp, const unsigned char *buf, int count)
+tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty,
+ const unsigned char *buf, int count)
{
int i_msg, i;
spin_lock_bh(&tp->view.lock);
- for (i_msg = 0; !tp->tty->stopped && i_msg < count; i_msg++) {
+ for (i_msg = 0; !tty->stopped && i_msg < count; i_msg++) {
if (tp->esc_state != 0) {
/* Continue escape sequence. */
tty3270_escape_sequence(tp, buf[i_msg]);
@@ -1595,10 +1586,10 @@ tty3270_write(struct tty_struct * tty,
if (!tp)
return 0;
if (tp->char_count > 0) {
- tty3270_do_write(tp, tp->char_buf, tp->char_count);
+ tty3270_do_write(tp, tty, tp->char_buf, tp->char_count);
tp->char_count = 0;
}
- tty3270_do_write(tp, buf, count);
+ tty3270_do_write(tp, tty, buf, count);
return count;
}
@@ -1629,7 +1620,7 @@ tty3270_flush_chars(struct tty_struct *tty)
if (!tp)
return;
if (tp->char_count > 0) {
- tty3270_do_write(tp, tp->char_buf, tp->char_count);
+ tty3270_do_write(tp, tty, tp->char_buf, tp->char_count);
tp->char_count = 0;
}
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-25 05:19:39 +0000