xen/console/xen_console.c

43 #include <sys/cons.h>
66 typedef void xencons_early_init_t(struct xencons_priv *cons);
69 typedef int xencons_read_t(struct xencons_priv *cons, char *buffer,
71 typedef int xencons_write_t(struct xencons_priv *cons, const char *buffer,
202 static inline void xencons_lock(struct xencons_priv *cons)
206 		mtx_lock_spin(&cons->mtx);
210 static inline void xencons_unlock(struct xencons_priv *cons)
214 		mtx_unlock_spin(&cons->mtx);
217 #define xencons_lock_assert(cons)	mtx_assert(&(cons)->mtx, MA_OWNED)
221 xencons_early_init_hypervisor(struct xencons_priv *cons)
233 	struct xencons_priv *cons;
236 	cons = tty_softc(tp);
239 	    intr_handler, tp, INTR_TYPE_TTY | INTR_MPSAFE, &cons->intr_handle);
247 xencons_write_hypervisor(struct xencons_priv *cons, const char *buffer,
257 xencons_read_hypervisor(struct xencons_priv *cons, char *buffer,
261 	xencons_lock_assert(cons);
275 xencons_early_init_ring(struct xencons_priv *cons)
278 	cons->intf = (struct xencons_interface *)console_page;
279 	cons->evtchn = HYPERVISOR_start_info->console.domU.evtchn;
285 	struct xencons_priv *cons;
288 	cons = tty_softc(tp);
290 	if (cons->evtchn == 0)
293 	err = xen_intr_bind_local_port(dev, cons->evtchn, NULL,
294 	    intr_handler, tp, INTR_TYPE_TTY | INTR_MPSAFE, &cons->intr_handle);
302 xencons_notify_ring(struct xencons_priv *cons)
309 	if (__predict_true(cons->intr_handle != NULL))
310 		xen_intr_signal(cons->intr_handle);
313 			.port = cons->evtchn
321 xencons_write_ring(struct xencons_priv *cons, const char *buffer,
328 	intf = cons->intf;
330 	xencons_lock_assert(cons);
348 	xencons_notify_ring(cons);
354 xencons_read_ring(struct xencons_priv *cons, char *buffer, unsigned int size)
360 	intf = cons->intf;
362 	xencons_lock_assert(cons);
379 		xencons_notify_ring(cons);
417 xencons_rx(struct xencons_priv *cons)
422 	xencons_lock(cons);
423 	while ((sz = cons->ops->read(cons, buf, sizeof(buf))) > 0) {
427 			cons->rbuf[RBUF_MASK(cons->rp++)] = buf[i];
429 	xencons_unlock(cons);
434 xencons_tx_full(struct xencons_priv *cons)
438 	xencons_lock(cons);
439 	used = cons->wp - cons->wc;
440 	xencons_unlock(cons);
446 xencons_tx_flush(struct xencons_priv *cons, int force)
450 	xencons_lock(cons);
451 	while (cons->wc != cons->wp) {
453 		sz = cons->wp - cons->wc;
454 		if (sz > (WBUF_SIZE - WBUF_MASK(cons->wc)))
455 			sz = WBUF_SIZE - WBUF_MASK(cons->wc);
456 		sent = cons->ops->write(cons, &cons->wbuf[WBUF_MASK(cons->wc)],
473 		cons->wc += sent;
475 	xencons_unlock(cons);
479 xencons_putc(struct xencons_priv *cons, int c, bool force_flush)
482 	xencons_lock(cons);
483 	if ((cons->wp - cons->wc) < WBUF_SIZE)
484 		cons->wbuf[WBUF_MASK(cons->wp++)] = c;
485 	xencons_unlock(cons);
487 	xencons_tx_flush(cons, force_flush);
489 	return (xencons_tx_full(cons));
493 xencons_getc(struct xencons_priv *cons)
497 	xencons_lock(cons);
498 	if (cons->rp != cons->rc) {
500 		ret = (int)cons->rbuf[RBUF_MASK(cons->rc)];
501 		cons->rc++;
506 	xencons_unlock(cons);
516 	struct xencons_priv *cons;
518 	cons = tty_softc(tp);
526 	if (xencons_tx_full(cons))
531 		cons_full = xencons_putc(cons, c, false);
540 	struct xencons_priv *cons;
544 	cons = tty_softc(tp);
555 	if (!cons->opened)
558 	xencons_rx(cons);
561 	while ((ret = xencons_getc(cons)) != -1) {
563 		kdb_alt_break(ret, &cons->altbrk);
571 	xencons_tx_flush(cons, 0);
648 	struct xencons_priv *cons;
650 	cons = tty_softc(tp);
652 	cons->opened = true;
660 	struct xencons_priv *cons;
662 	cons = tty_softc(tp);
664 	cons->opened = false;
671 	struct xencons_priv *cons;
674 	cons = tty_softc(tp);
677 		callout_reset(&cons->callout, XC_POLLTIME,
684 	struct xencons_priv *cons;
686 	cons = tty_softc(tp);
688 	callout_stop(&cons->callout);
691 		callout_reset(&cons->callout, XC_POLLTIME,
735 	struct xencons_priv *cons;
738 	cons = &main_cons;
740 	tp = tty_alloc(&xencons_ttydevsw, cons);
744 	callout_init_mtx(&cons->callout, tty_getlock(tp), 0);
746 	err = cons->ops->init(dev, tp, xencons_intr);
764 	struct xencons_priv *cons;
769 	cons = tty_softc(tp);
770 	xen_intr_unbind(&cons->intr_handle);
772 	err = cons->ops->init(dev, tp, xencons_intr);