sparc32_dma: use object link instead of qdev property to pass IOMMU r…

…eference

This enables us to remove the last remaining (opaque) qdev property. Whilst we
are here, also update iommu_init() to use TYPE_SUN4M_IOMMU instead of a
hardcoded string.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Artyom Tarasenko <atar4qemu@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

hw/dma/sparc32_dma.c

@@ -263,24 +263,21 @@ static void sparc32_dma_device_init(Object *obj)
 
     sysbus_init_mmio(sbd, &s->iomem);
 
+    object_property_add_link(OBJECT(dev), "iommu", TYPE_SUN4M_IOMMU,
+                             (Object **) &s->iommu,
+                             qdev_prop_allow_set_link_before_realize,
+                             0, NULL);
+
     qdev_init_gpio_in(dev, dma_set_irq, 1);
     qdev_init_gpio_out(dev, s->gpio, 2);
 }
 
-static Property sparc32_dma_device_properties[] = {
-    DEFINE_PROP_PTR("iommu_opaque", DMADeviceState, iommu),
-    DEFINE_PROP_END_OF_LIST(),
-};
-
 static void sparc32_dma_device_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->reset = sparc32_dma_device_reset;
     dc->vmsd = &vmstate_sparc32_dma_device;
-    dc->props = sparc32_dma_device_properties;
-    /* Reason: pointer property "iommu_opaque" */
-    dc->user_creatable = false;
 }
 
 static const TypeInfo sparc32_dma_device_info = {

hw/sparc/sun4m.c

@@ -296,7 +296,7 @@ static void *iommu_init(hwaddr addr, uint32_t version, qemu_irq irq)
     DeviceState *dev;
     SysBusDevice *s;
 
-    dev = qdev_create(NULL, "iommu");
+    dev = qdev_create(NULL, TYPE_SUN4M_IOMMU);
     qdev_prop_set_uint32(dev, "version", version);
     qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
@@ -312,7 +312,7 @@ static void *sparc32_dma_init(hwaddr daddr, void *iommu, int is_ledma)
     SysBusDevice *s;
 
     dev = qdev_create(NULL, is_ledma ? "sparc32-ledma" : "sparc32-espdma");
-    qdev_prop_set_ptr(dev, "iommu_opaque", iommu);
+    object_property_set_link(OBJECT(dev), OBJECT(iommu), "iommu", &error_abort);
     qdev_init_nofail(dev);
     s = SYS_BUS_DEVICE(dev);
     sysbus_mmio_map(s, 0, daddr);