Differential D24459 Diff 147476 sys/dev/virtio/console/virtio_console.c

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sys/dev/virtio/console/virtio_console.c

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#if defined(KDB)		#if defined(KDB)
int vtcport_alt_break_state;		int vtcport_alt_break_state;
#endif		#endif
};		};

#define VTCON_PORT_LOCK(_port) mtx_lock(&(_port)->vtcport_mtx)		#define VTCON_PORT_LOCK(_port) mtx_lock(&(_port)->vtcport_mtx)
#define VTCON_PORT_UNLOCK(_port) mtx_unlock(&(_port)->vtcport_mtx)		#define VTCON_PORT_UNLOCK(_port) mtx_unlock(&(_port)->vtcport_mtx)
		#define VTCON_PORT_ASSERT(_port, ma) mtx_assert(&(_port)->vtcport_mtx, (ma))

struct vtcon_softc_port {		struct vtcon_softc_port {
struct vtcon_softc *vcsp_sc;		struct vtcon_softc *vcsp_sc;
struct vtcon_port *vcsp_port;		struct vtcon_port *vcsp_port;
struct virtqueue *vcsp_invq;		struct virtqueue *vcsp_invq;
struct virtqueue *vcsp_outvq;		struct virtqueue *vcsp_outvq;
};		};

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vtcon_port_in(struct vtcon_port *port)		vtcon_port_in(struct vtcon_port *port)
{		{
struct virtqueue *vq;		struct virtqueue *vq;
struct tty *tp;		struct tty *tp;
char *buf;		char *buf;
uint32_t len;		uint32_t len;
int i, deq;		int i, deq;

		/* Effectively the ttydisc lock. */
		VTCON_PORT_ASSERT(port, MA_OWNED);
tp = port->vtcport_tty;		tp = port->vtcport_tty;
vq = port->vtcport_invq;		vq = port->vtcport_invq;

again:		again:
deq = 0;		deq = 0;

while ((buf = virtqueue_dequeue(vq, &len)) != NULL) {		while ((buf = virtqueue_dequeue(vq, &len)) != NULL) {
for (i = 0; i < len; i++) {		for (i = 0; i < len; i++) {
▲ Show 20 Lines • Show All 74 Lines • ▼ Show 20 Lines	vtcon_port_submit_event(struct vtcon_port *port, uint16_t event,
vtcon_ctrl_send_control(sc, port->vtcport_id, event, value);		vtcon_ctrl_send_control(sc, port->vtcport_id, event, value);
}		}

static int		static int
vtcon_tty_open(struct tty *tp)		vtcon_tty_open(struct tty *tp)
{		{
struct vtcon_port *port;		struct vtcon_port *port;

		/* Effectively VTCON_PORT_LOCK. */
		ttydisc_assert_locked(tp);
port = tty_softc(tp);		port = tty_softc(tp);
		if (port->vtcport_flags & VTCON_PORT_FLAG_GONE) {
if (port->vtcport_flags & VTCON_PORT_FLAG_GONE)
return (ENXIO);		return (ENXIO);
		}

vtcon_port_submit_event(port, VIRTIO_CONSOLE_PORT_OPEN, 1);		vtcon_port_submit_event(port, VIRTIO_CONSOLE_PORT_OPEN, 1);

return (0);		return (0);
}		}

static void		static void
vtcon_tty_close(struct tty *tp)		vtcon_tty_close(struct tty *tp)
{		{
struct vtcon_port *port;		struct vtcon_port *port;

		/* Effectively VTCON_PORT_LOCK. */
		ttydisc_assert_locked(tp);
port = tty_softc(tp);		port = tty_softc(tp);

if (port->vtcport_flags & VTCON_PORT_FLAG_GONE)		if (port->vtcport_flags & VTCON_PORT_FLAG_GONE)
return;		return;

vtcon_port_submit_event(port, VIRTIO_CONSOLE_PORT_OPEN, 0);		vtcon_port_submit_event(port, VIRTIO_CONSOLE_PORT_OPEN, 0);
}		}

static void		static void
vtcon_tty_outwakeup(struct tty *tp)		vtcon_tty_outwakeup(struct tty *tp)
{		{
struct vtcon_port *port;		struct vtcon_port *port;
char buf[VTCON_BULK_BUFSZ];		char buf[VTCON_BULK_BUFSZ];
int len;		int len;

		/* Effectively VTCON_PORT_LOCK. */
		ttydisc_assert_locked(tp);
port = tty_softc(tp);		port = tty_softc(tp);

if (port->vtcport_flags & VTCON_PORT_FLAG_GONE)		if (port->vtcport_flags & VTCON_PORT_FLAG_GONE)
return;		return;

while ((len = ttydisc_getc(tp, buf, sizeof(buf))) != 0)		while ((len = ttydisc_getc(tp, buf, sizeof(buf))) != 0)
vtcon_port_out(port, buf, len);		vtcon_port_out(port, buf, len);
}		}
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