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drivers: ethernet: eth_virtio_net: Support MAC address config #100106

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Merged
merged 1 commit into from
Nov 28, 2025
Merged

drivers: ethernet: eth_virtio_net: Support MAC address config #100106

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14 changes: 3 additions & 11 deletions drivers/ethernet/eth_virtio_net.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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;
};

Expand Down Expand Up @@ -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) {
Expand All @@ -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, \
Expand Down