From: Eli Cohen <e...@nvidia.com>

Add code to accept MAC configuration through vdpa tool. The MAC is
written into the config struct and later can be retrieved through
get_config().

Examples:
1. Configure MAC:
$ vdpa dev config set vdpa0 mac 00:11:22:33:44:55

2. Show configured params:
$ vdpa dev config show
vdpa0: mac 00:11:22:33:44:55 link down link_announce false mtu 0 speed 0 duplex 0

Signed-off-by: Eli Cohen <e...@nvidia.com>
Reviewed-by: Parav Pandit <pa...@nvidia.com>
---
changelog:
v2->v3:
 - following new api for config space setup for mgmt tool
v1->v2:
 - following new api for config get/set for mgmt tool
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c 
b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index dda5dc6f7737..7f3d09f201fc 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1831,6 +1831,30 @@ static void mlx5_vdpa_set_config(struct vdpa_device 
*vdev, unsigned int offset,
        /* not supported */
 }
 
+static int mlx5_vdpa_setup_config(struct vdpa_device *vdev,
+                                 const struct vdpa_dev_set_config *config)
+{
+       struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
+       struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
+       int err = 0;
+
+       mutex_lock(&ndev->reslock);
+       if (ndev->setup)
+               err = -EBUSY;
+       mutex_unlock(&ndev->reslock);
+
+       if (err)
+               return err;
+
+       if (config->net_mask.mtu_valid)
+               return -EOPNOTSUPP;
+
+       if (config->net_mask.mac_valid)
+               memcpy(ndev->config.mac, config->net.mac, ETH_ALEN);
+
+       return 0;
+}
+
 static u32 mlx5_vdpa_get_generation(struct vdpa_device *vdev)
 {
        struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
@@ -1909,6 +1933,7 @@ static const struct vdpa_config_ops mlx5_vdpa_ops = {
        .get_config_size = mlx5_vdpa_get_config_size,
        .get_config = mlx5_vdpa_get_config,
        .set_config = mlx5_vdpa_set_config,
+       .setup_config = mlx5_vdpa_setup_config,
        .get_generation = mlx5_vdpa_get_generation,
        .set_map = mlx5_vdpa_set_map,
        .free = mlx5_vdpa_free,
-- 
2.26.2

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