aboutsummaryrefslogtreecommitdiffstats
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.c90
1 files changed, 73 insertions, 17 deletions
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index e96fc7fd9498..272cb6cd1b2a 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -92,6 +92,7 @@ struct tty3270 {
unsigned char inattr; /* Visible/invisible input. */
int throttle, attn; /* tty throttle/unthrottle. */
struct tasklet_struct readlet; /* Tasklet to issue read request. */
+ struct tasklet_struct hanglet; /* Tasklet to hang up the tty. */
struct kbd_data *kbd; /* key_maps stuff. */
/* Escape sequence parsing. */
@@ -319,6 +320,27 @@ tty3270_blank_line(struct tty3270 *tp)
}
/*
+ * Create a blank screen and remove all lines from the history.
+ */
+static void
+tty3270_blank_screen(struct tty3270 *tp)
+{
+ struct string *s, *n;
+ int i;
+
+ for (i = 0; i < tp->view.rows - 2; i++)
+ tp->screen[i].len = 0;
+ tp->nr_up = 0;
+ list_for_each_entry_safe(s, n, &tp->lines, list) {
+ list_del(&s->list);
+ if (!list_empty(&s->update))
+ list_del(&s->update);
+ tp->nr_lines--;
+ free_string(&tp->freemem, s);
+ }
+}
+
+/*
* Write request completion callback.
*/
static void
@@ -405,7 +427,10 @@ tty3270_update(struct tty3270 *tp)
if (raw3270_request_add_data(wrq, str, len) != 0)
break;
list_del_init(&s->update);
- sba = s->string + s->len - 3;
+ if (s->string[s->len - 4] == TO_RA)
+ sba = s->string + s->len - 3;
+ else
+ sba = invalid_sba;
}
if (list_empty(&tp->update))
updated |= TTY_UPDATE_LIST;
@@ -622,6 +647,16 @@ tty3270_issue_read(struct tty3270 *tp, int lock)
}
/*
+ * Hang up the tty
+ */
+static void
+tty3270_hangup_tasklet(struct tty3270 *tp)
+{
+ tty_port_tty_hangup(&tp->port, true);
+ raw3270_put_view(&tp->view);
+}
+
+/*
* Switch to the tty view.
*/
static int
@@ -642,7 +677,7 @@ tty3270_deactivate(struct raw3270_view *view)
del_timer(&tp->timer);
}
-static int
+static void
tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
{
/* Handle ATTN. Schedule tasklet to read aid. */
@@ -654,17 +689,19 @@ tty3270_irq(struct tty3270 *tp, struct raw3270_request *rq, struct irb *irb)
}
if (rq) {
- if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)
+ if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) {
rq->rc = -EIO;
- else
+ raw3270_get_view(&tp->view);
+ tasklet_schedule(&tp->hanglet);
+ } else {
/* Normal end. Copy residual count. */
rq->rescnt = irb->scsw.cmd.count;
+ }
} else if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {
/* Interrupt without an outstanding request -> update all */
tp->update_flags = TTY_UPDATE_ALL;
tty3270_set_timer(tp, 1);
}
- return RAW3270_IO_DONE;
}
/*
@@ -716,6 +753,9 @@ tty3270_alloc_view(void)
tasklet_init(&tp->readlet,
(void (*)(unsigned long)) tty3270_read_tasklet,
(unsigned long) tp->read);
+ tasklet_init(&tp->hanglet,
+ (void (*)(unsigned long)) tty3270_hangup_tasklet,
+ (unsigned long) tp);
INIT_WORK(&tp->resize_work, tty3270_resize_work);
return tp;
@@ -814,6 +854,7 @@ static void tty3270_resize_work(struct work_struct *work)
return;
/* Switch to new output size */
spin_lock_bh(&tp->view.lock);
+ tty3270_blank_screen(tp);
oscreen = tp->screen;
orows = tp->view.rows;
tp->view.model = tp->n_model;
@@ -824,7 +865,6 @@ static void tty3270_resize_work(struct work_struct *work)
free_string(&tp->freemem, tp->status);
tty3270_create_prompt(tp);
tty3270_create_status(tp);
- tp->nr_up = 0;
while (tp->nr_lines < tp->view.rows - 2)
tty3270_blank_line(tp);
tp->update_flags = TTY_UPDATE_ALL;
@@ -838,6 +878,7 @@ static void tty3270_resize_work(struct work_struct *work)
ws.ws_row = tp->view.rows - 2;
ws.ws_col = tp->view.cols;
tty_do_resize(tty, &ws);
+ tty_kref_put(tty);
}
static void
@@ -845,6 +886,8 @@ tty3270_resize(struct raw3270_view *view, int model, int rows, int cols)
{
struct tty3270 *tp = container_of(view, struct tty3270, view);
+ if (tp->n_model == model && tp->n_rows == rows && tp->n_cols == cols)
+ return;
tp->n_model = model;
tp->n_rows = rows;
tp->n_cols = cols;
@@ -923,10 +966,8 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
tty->winsize.ws_row = tp->view.rows - 2;
tty->winsize.ws_col = tp->view.cols;
tp->port.low_latency = 0;
- /* why to reassign? */
- tty_port_tty_set(&tp->port, tty);
tp->inattr = TF_INPUT;
- return tty_port_install(&tp->port, driver, tty);
+ goto port_install;
}
if (tty3270_max_index < tty->index + 1)
tty3270_max_index = tty->index + 1;
@@ -952,7 +993,6 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
return rc;
}
- tty_port_tty_set(&tp->port, tty);
tp->port.low_latency = 0;
tty->winsize.ws_row = tp->view.rows - 2;
tty->winsize.ws_col = tp->view.cols;
@@ -974,6 +1014,7 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
raw3270_activate_view(&tp->view);
+port_install:
rc = tty_port_install(&tp->port, driver, tty);
if (rc) {
raw3270_put_view(&tp->view);
@@ -1010,18 +1051,18 @@ tty3270_close(struct tty_struct *tty, struct file * filp)
if (tty->count > 1)
return;
- if (tp) {
- tty->driver_data = NULL;
+ if (tp)
tty_port_tty_set(&tp->port, NULL);
- }
}
static void tty3270_cleanup(struct tty_struct *tty)
{
struct tty3270 *tp = tty->driver_data;
- if (tp)
+ if (tp) {
+ tty->driver_data = NULL;
raw3270_put_view(&tp->view);
+ }
}
/*
@@ -1788,7 +1829,22 @@ tty3270_unthrottle(struct tty_struct * tty)
static void
tty3270_hangup(struct tty_struct *tty)
{
- // FIXME: implement
+ struct tty3270 *tp;
+
+ tp = tty->driver_data;
+ if (!tp)
+ return;
+ spin_lock_bh(&tp->view.lock);
+ tp->cx = tp->saved_cx = 0;
+ tp->cy = tp->saved_cy = 0;
+ tp->highlight = tp->saved_highlight = TAX_RESET;
+ tp->f_color = tp->saved_f_color = TAC_RESET;
+ tty3270_blank_screen(tp);
+ while (tp->nr_lines < tp->view.rows - 2)
+ tty3270_blank_line(tp);
+ tp->update_flags = TTY_UPDATE_ALL;
+ spin_unlock_bh(&tp->view.lock);
+ tty3270_set_timer(tp, 1);
}
static void
@@ -1804,7 +1860,7 @@ static int tty3270_ioctl(struct tty_struct *tty, unsigned int cmd,
tp = tty->driver_data;
if (!tp)
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
return kbd_ioctl(tp->kbd, cmd, arg);
}
@@ -1818,7 +1874,7 @@ static long tty3270_compat_ioctl(struct tty_struct *tty,
tp = tty->driver_data;
if (!tp)
return -ENODEV;
- if (tty->flags & (1 << TTY_IO_ERROR))
+ if (tty_io_error(tty))
return -EIO;
return kbd_ioctl(tp->kbd, cmd, (unsigned long)compat_ptr(arg));
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.