Function gicv3_its_alloc_msix

freebsd/arm64/arm64/gicv3_its.c:1364–1401

}

static int
gicv3_its_alloc_msix(device_t dev, device_t child, device_t *pic,
    struct intr_irqsrc **isrcp)
{
	struct gicv3_its_softc *sc;
	struct gicv3_its_irqsrc *girq;
	struct its_dev *its_dev;
	u_int nvecs, irq;

	nvecs = pci_msix_count(child);
	its_dev = its_device_get(dev, child, nvecs);
	if (its_dev == NULL)
		return (ENXIO);

	KASSERT(its_dev->lpis.lpi_free > 0,
	    ("gicv3_its_alloc_msix: No free LPIs"));
	sc = device_get_softc(dev);
	irq = its_dev->lpis.lpi_base + its_dev->lpis.lpi_num -
	    its_dev->lpis.lpi_free;

	girq = gicv3_its_alloc_irqsrc(dev, sc, irq);
	if (girq == NULL)
		return (ENXIO);
	girq->gi_id = its_dev->lpis.lpi_busy;
	girq->gi_its_dev = its_dev;

	its_dev->lpis.lpi_free--;
	its_dev->lpis.lpi_busy++;

	/* Map the message to the given IRQ */
	gicv3_its_select_cpu(dev, (struct intr_irqsrc *)girq);
	its_cmd_mapti(dev, girq);

	*pic = dev;
	*isrcp = (struct intr_irqsrc *)girq;

	return (0);
}

static int
gicv3_its_release_msix(device_t dev, device_t child, struct intr_irqsrc *isrc)