static void
sclp_console_write(struct console *console, const char *message,
unsigned int count)
{
unsigned long flags;
void *page;
int written;
if (count == 0)
return;
spin_lock_irqsave(&sclp_con_lock, flags);
/*
*/
do {
/* */
if (sclp_conbuf == NULL) {
while (list_empty(&sclp_con_pages)) {
if (sclp_con_suspended)
goto out;
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_con_lock, flags);
}
page = sclp_con_pages.next;
list_del((struct list_head *) page);
sclp_conbuf = sclp_make_buffer(page, sclp_con_columns,
sclp_con_width_htab);
}
/* */
written = sclp_write(sclp_conbuf, (const unsigned char *)
message, count);
if (written == count)
break;
/*
*/
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_conbuf_emit();
spin_lock_irqsave(&sclp_con_lock, flags);
message += written;
count -= written;
} while (count > 0);
/* */
if (sclp_conbuf != NULL && sclp_chars_in_buffer(sclp_conbuf) != 0 &&
!timer_pending(&sclp_con_timer)) {
init_timer(&sclp_con_timer);
sclp_con_timer.function = sclp_console_timeout;
sclp_con_timer.data = 0UL;
sclp_con_timer.expires = jiffies + HZ/10;
add_timer(&sclp_con_timer);
}
out:
spin_unlock_irqrestore(&sclp_con_lock, flags);
}
static void
sclp_console_write(struct console *console, const char *message,
unsigned int count)
{
unsigned long flags;
void *page;
int written;
if (count == 0)
return;
spin_lock_irqsave(&sclp_con_lock, flags);
/*
* process escape characters, write message into buffer,
* send buffer to SCLP
*/
do {
/* make sure we have a console output buffer */
if (sclp_conbuf == NULL) {
while (list_empty(&sclp_con_pages)) {
if (sclp_con_suspended)
goto out;
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_con_lock, flags);
}
page = sclp_con_pages.next;
list_del((struct list_head *) page);
sclp_conbuf = sclp_make_buffer(page, sclp_con_columns,
sclp_con_width_htab);
}
/* try to write the string to the current output buffer */
written = sclp_write(sclp_conbuf, (const unsigned char *)
message, count);
if (written == count)
break;
/*
* Not all characters could be written to the current
* output buffer. Emit the buffer, create a new buffer
* and then output the rest of the string.
*/
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_conbuf_emit();
spin_lock_irqsave(&sclp_con_lock, flags);
message += written;
count -= written;
} while (count > 0);
/* Setup timer to output current console buffer after 1/10 second */
if (sclp_conbuf != NULL && sclp_chars_in_buffer(sclp_conbuf) != 0 &&
!timer_pending(&sclp_con_timer)) {
init_timer(&sclp_con_timer);
sclp_con_timer.function = sclp_console_timeout;
sclp_con_timer.data = 0UL;
sclp_con_timer.expires = jiffies + HZ/10;
add_timer(&sclp_con_timer);
}
out:
spin_unlock_irqrestore(&sclp_con_lock, flags);
}
static void sclp_console_resume(void)
{
unsigned long flags;
spin_lock_irqsave(&sclp_con_lock, flags);
sclp_con_suspended = 0;
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_conbuf_emit();
}
/*
* This routine is called from panic when the kernel
* is going to give up. We have to make sure that all buffers
* will be flushed to the SCLP.
*/
static void
sclp_console_flush(void)
{
unsigned long flags;
sclp_conbuf_emit();
spin_lock_irqsave(&sclp_con_lock, flags);
if (timer_pending(&sclp_con_timer))
del_timer(&sclp_con_timer);
while (sclp_con_buffer_count > 0) {
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_con_lock, flags);
}
spin_unlock_irqrestore(&sclp_con_lock, flags);
}
static void
sclp_console_flush(void)
{
sclp_conbuf_emit();
sclp_console_sync_queue();
}
static void
sclp_console_timeout(unsigned long data)
{
sclp_conbuf_emit();
}
