Function its_cmd_send

freebsd/arm64/arm64/gicv3_its.c:1747–1788

}

static int
its_cmd_send(device_t dev, struct its_cmd_desc *desc)
{
	struct gicv3_its_softc *sc;
	struct its_cmd *cmd, *cmd_sync, *cmd_write;
	struct its_col col_sync;
	struct its_cmd_desc desc_sync;
	uint64_t target, cwriter;

	sc = device_get_softc(dev);
	mtx_lock_spin(&sc->sc_its_cmd_lock);
	cmd = its_cmd_alloc_locked(dev);
	if (cmd == NULL) {
		device_printf(dev, "could not allocate ITS command\n");
		mtx_unlock_spin(&sc->sc_its_cmd_lock);
		return (EBUSY);
	}

	target = its_cmd_prepare(cmd, desc);
	its_cmd_sync(sc, cmd);

	if (target != ITS_TARGET_NONE) {
		cmd_sync = its_cmd_alloc_locked(dev);
		if (cmd_sync != NULL) {
			desc_sync.cmd_type = ITS_CMD_SYNC;
			col_sync.col_target = target;
			desc_sync.cmd_desc_sync.col = &col_sync;
			its_cmd_prepare(cmd_sync, &desc_sync);
			its_cmd_sync(sc, cmd_sync);
		}
	}

	/* Update GITS_CWRITER */
	cwriter = sc->sc_its_cmd_next_idx * sizeof(struct its_cmd);
	gic_its_write_8(sc, GITS_CWRITER, cwriter);
	cmd_write = &sc->sc_its_cmd_base[sc->sc_its_cmd_next_idx];
	mtx_unlock_spin(&sc->sc_its_cmd_lock);

	its_cmd_wait_completion(dev, cmd, cmd_write);

	return (0);
}

/* Handlers to send commands */
static void