vcc.c (69851e4ab8feeb369119a44ddca430c0ee15f0d8) vcc.c (95713967ba52389f7cea75704d0cf048080ec218)
1// SPDX-License-Identifier: GPL-2.0
2/* vcc.c: sun4v virtual channel concentrator
3 *
4 * Copyright (C) 2017 Oracle. All rights reserved.
5 */
6
7#include <linux/delay.h>
8#include <linux/interrupt.h>

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799
800 vcc_ldc_hup(port);
801
802 vcc_put(port, false);
803
804 tty_port_hangup(tty->port);
805}
806
1// SPDX-License-Identifier: GPL-2.0
2/* vcc.c: sun4v virtual channel concentrator
3 *
4 * Copyright (C) 2017 Oracle. All rights reserved.
5 */
6
7#include <linux/delay.h>
8#include <linux/interrupt.h>

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799
800 vcc_ldc_hup(port);
801
802 vcc_put(port, false);
803
804 tty_port_hangup(tty->port);
805}
806
807static int vcc_write(struct tty_struct *tty, const u8 *buf, int count)
807static ssize_t vcc_write(struct tty_struct *tty, const u8 *buf, size_t count)
808{
809 struct vcc_port *port;
810 struct vio_vcc *pkt;
811 unsigned long flags;
812 int total_sent = 0;
813 int tosend = 0;
814 int rv = -EINVAL;
815

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821
822 spin_lock_irqsave(&port->lock, flags);
823
824 pkt = &port->buffer;
825 pkt->tag.type = VIO_TYPE_DATA;
826
827 while (count > 0) {
828 /* Minimum of data to write and space available */
808{
809 struct vcc_port *port;
810 struct vio_vcc *pkt;
811 unsigned long flags;
812 int total_sent = 0;
813 int tosend = 0;
814 int rv = -EINVAL;
815

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821
822 spin_lock_irqsave(&port->lock, flags);
823
824 pkt = &port->buffer;
825 pkt->tag.type = VIO_TYPE_DATA;
826
827 while (count > 0) {
828 /* Minimum of data to write and space available */
829 tosend = min(count, (VCC_BUFF_LEN - port->chars_in_buffer));
829 tosend = min_t(size_t, count,
830 (VCC_BUFF_LEN - port->chars_in_buffer));
830
831 if (!tosend)
832 break;
833
834 memcpy(&pkt->data[port->chars_in_buffer], &buf[total_sent],
835 tosend);
836 port->chars_in_buffer += tosend;
837 pkt->tag.stype = tosend;

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832 if (!tosend)
833 break;
834
835 memcpy(&pkt->data[port->chars_in_buffer], &buf[total_sent],
836 tosend);
837 port->chars_in_buffer += tosend;
838 pkt->tag.stype = tosend;

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