drivers: ethernet: eth_virtio_net: Support MAC address config

Update the virtio ethernet driver to use a MAC address configuration
struct.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>

Author: pdgendt

drivers/ethernet/eth_virtio_net.c

@@ -11,7 +11,6 @@
 #include <zephyr/drivers/virtio/virtqueue.h>
 #include <zephyr/sys/util.h>
 #include <zephyr/sys/atomic.h>
-#include <zephyr/random/random.h>
 #include "eth.h"
 
 #define DT_DRV_COMPAT virtio_net
@@ -95,7 +94,7 @@ enum _virtio_net_hdr_gso_types {
 
 struct virtnet_config {
 	const struct device *vdev;
-	bool random_mac;
+	struct net_eth_mac_config mcfg;
 	unsigned int inst;
 };
 
@@ -215,13 +214,7 @@ static int virtnet_dev_init(const struct device *dev)
 	const struct virtnet_config *config = dev->config;
 	struct virtnet_data *data = dev->data;
 
-	if (config->random_mac) {
-		sys_rand_get(data->mac, sizeof(data->mac));
-		/* make it a locally administered, unicast address */
-		/* (2nd hex digit of 1st byte is 2) */
-		data->mac[0] &= ~(BIT(0) | BIT(2) | BIT(3));
-		data->mac[0] |= BIT(1);
-	}
+	(void)net_eth_mac_load(&config->mcfg, data->mac);
 
 	data->virtio_devcfg = virtio_get_device_specific_config(config->vdev);
 	if (data->virtio_devcfg == NULL) {
@@ -248,11 +241,10 @@ static struct ethernet_api virtnet_api = {
 #define VIRTIO_NET_DEFINE(inst)                                                                    \
 	static struct virtnet_data virtnet_data_##inst = {                                         \
 		.dev = DEVICE_DT_INST_GET(inst),                                                   \
-		.mac = DT_INST_PROP_OR(inst, local_mac_address, {0}),                              \
 	};                                                                                         \
 	static const struct virtnet_config virtnet_config_##inst = {                               \
 		.vdev = DEVICE_DT_GET(DT_INST_PARENT(inst)),                                       \
-		.random_mac = DT_INST_PROP(inst, zephyr_random_mac_address),                       \
+		.mcfg = NET_ETH_MAC_DT_INST_CONFIG_INIT(inst),                                     \
 	};                                                                                         \
 	ETH_NET_DEVICE_DT_INST_DEFINE(inst, virtnet_dev_init, NULL, &virtnet_data_##inst,          \
 				      &virtnet_config_##inst, CONFIG_ETH_INIT_PRIORITY,            \