refactor net uio driver and improve logging

Signed-off-by: Bill Nguyen <[email protected]>

tools/linux/include/uio/net.h

@@ -12,6 +12,29 @@
 
 typedef struct {
     /* Any info that the VMM wants to give us go in here */
+
+    /* We need these as the network virtualisers give us physical addresses
+       in the data region, so we need the base to get the offsets to actually
+       read the data. */
     uint64_t rx_paddr;
     uint64_t tx_paddrs[NUM_NETWORK_CLIENTS];
 } vmm_net_info_t;
+
+/* These are where the UIO shared memory regions and IRQs live */
+#define UIO_PATH_SDDF_NET_CONTROL_AND_DATA_QUEUES "/dev/uio0"
+
+/* This is how the VMM notify us of notifications from virt TX and RX.
+   Once IRQ is enabled by writing to a UIO FD from these, a read on the same
+   FD will block until the VMM does a virq_inject on the associated IRQ number
+   in device tree. */
+#define UIO_PATH_SDDF_NET_INCOMING_TX_IRQ "/dev/uio1"
+#define UIO_PATH_SDDF_NET_INCOMING_RX_IRQ "/dev/uio2"
+
+/* Data passing between the VMM and guest. Currently it is used for passing the
+   physical addresses of the data regions */
+#define UIO_PATH_SDDF_NET_SHARED_DATA "/dev/uio3"
+
+/* This is how the guest can signal back to VMM, the physical address of these
+   UIO regions are unmapped, so a fault is generated */
+#define UIO_PATH_SDDF_NET_TX_FAULT_TO_VMM "/dev/uio4"
+#define UIO_PATH_SDDF_NET_RX_FAULT_TO_VMM "/dev/uio5"