etraxfs: remove PROP_PTR usage

etraxfs_dma_client are not Object, so can't be exposed to user with
QOM path. Let's remove property usage and move the constructor to the
.c unit, simplifying some code on the way.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/hw/net/etraxfs_eth.c b/hw/net/etraxfs_eth.c
index 4cfbf11..f30d963 100644
--- a/hw/net/etraxfs_eth.c
+++ b/hw/net/etraxfs_eth.c
@@ -338,14 +338,8 @@
     uint8_t macaddr[2][6];
     uint32_t regs[FS_ETH_MAX_REGS];
 
-    union {
-        void *vdma_out;
-        struct etraxfs_dma_client *dma_out;
-    };
-    union {
-        void *vdma_in;
-        struct etraxfs_dma_client *dma_in;
-    };
+    struct etraxfs_dma_client *dma_out;
+    struct etraxfs_dma_client *dma_in;
 
     /* MDIO bus.  */
     struct qemu_mdio mdio_bus;
@@ -635,8 +629,6 @@
 
 static Property etraxfs_eth_properties[] = {
     DEFINE_PROP_UINT32("phyaddr", ETRAXFSEthState, phyaddr, 1),
-    DEFINE_PROP_PTR("dma_out", ETRAXFSEthState, vdma_out),
-    DEFINE_PROP_PTR("dma_in", ETRAXFSEthState, vdma_in),
     DEFINE_NIC_PROPERTIES(ETRAXFSEthState, conf),
     DEFINE_PROP_END_OF_LIST(),
 };
@@ -648,10 +640,40 @@
     dc->realize = etraxfs_eth_realize;
     dc->reset = etraxfs_eth_reset;
     dc->props = etraxfs_eth_properties;
-    /* Reason: pointer properties "dma_out", "dma_in" */
+    /* Reason: dma_out, dma_in are not user settable */
     dc->user_creatable = false;
 }
 
+
+/* Instantiate an ETRAXFS Ethernet MAC.  */
+DeviceState *
+etraxfs_eth_init(NICInfo *nd, hwaddr base, int phyaddr,
+                 struct etraxfs_dma_client *dma_out,
+                 struct etraxfs_dma_client *dma_in)
+{
+    DeviceState *dev;
+    qemu_check_nic_model(nd, "fseth");
+
+    dev = qdev_create(NULL, "etraxfs-eth");
+    qdev_set_nic_properties(dev, nd);
+    qdev_prop_set_uint32(dev, "phyaddr", phyaddr);
+
+    /*
+     * TODO: QOM design, define a QOM interface for "I am an etraxfs
+     * DMA client" (which replaces the current 'struct
+     * etraxfs_dma_client' ad-hoc interface), implement it on the
+     * ethernet device, and then have QOM link properties on the DMA
+     * controller device so that you can pass the interface
+     * implementations to it.
+     */
+    ETRAX_FS_ETH(dev)->dma_out = dma_out;
+    ETRAX_FS_ETH(dev)->dma_in = dma_in;
+    qdev_init_nofail(dev);
+    sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
+
+    return dev;
+}
+
 static const TypeInfo etraxfs_eth_info = {
     .name          = TYPE_ETRAX_FS_ETH,
     .parent        = TYPE_SYS_BUS_DEVICE,