[PATCH linux-next v7 7/8] vdpa/mlx5: Support configuration of MAC

Parav Pandit
2021-10-26T17:55:18Z

From: Eli Cohen <elic at 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 while adding a device:
$ vdpa dev add mgmtdev pci/0000:06:00.2 name 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 max_vq_pairs 8 mtu
1500

Signed-off-by: Eli Cohen <elic at nvidia.com>
Reviewed-by: Parav Pandit <parav at nvidia.com>
Acked-by: Jason Wang <jasowang at redhat.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c
b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 8d1539728a59..cc027499c4d3 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -6,6 +6,7 @@
 #include <linux/vringh.h>
 #include <uapi/linux/virtio_net.h>
 #include <uapi/linux/virtio_ids.h>
+#include <uapi/linux/vdpa.h>
 #include <linux/virtio_config.h>
 #include <linux/auxiliary_bus.h>
 #include <linux/mlx5/cq.h>
@@ -2524,17 +2525,20 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev
*v_mdev, const char *name,
 		goto err_mtu;

 	ndev->config.mtu = cpu_to_mlx5vdpa16(mvdev, mtu);
-	ndev->config.status |= cpu_to_mlx5vdpa16(mvdev, VIRTIO_NET_S_LINK_UP);
-
-	err = mlx5_query_nic_vport_mac_address(mdev, 0, 0, config->mac);
-	if (err)
-		goto err_mtu;

 	if (get_link_state(mvdev))
 		ndev->config.status |= cpu_to_mlx5vdpa16(mvdev, VIRTIO_NET_S_LINK_UP);
 	else
 		ndev->config.status &= cpu_to_mlx5vdpa16(mvdev,
~VIRTIO_NET_S_LINK_UP);

+	if (add_config->mask & (1 << VDPA_ATTR_DEV_NET_CFG_MACADDR)) {
+		memcpy(ndev->config.mac, add_config->net.mac, ETH_ALEN);
+	} else {
+		err = mlx5_query_nic_vport_mac_address(mdev, 0, 0, config->mac);
+		if (err)
+			goto err_mtu;
+	}
+
 	if (!is_zero_ether_addr(config->mac)) {
 		pfmdev = pci_get_drvdata(pci_physfn(mdev->pdev));
 		err = mlx5_mpfs_add_mac(pfmdev, config->mac);
@@ -2632,6 +2636,7 @@ static int mlx5v_probe(struct auxiliary_device *adev,
 	mgtdev->mgtdev.ops = &mdev_ops;
 	mgtdev->mgtdev.device = mdev->device;
 	mgtdev->mgtdev.id_table = id_table;
+	mgtdev->mgtdev.config_attr_mask = (1 <<
VDPA_ATTR_DEV_NET_CFG_MACADDR);
 	mgtdev->madev = madev;

 	err = vdpa_mgmtdev_register(&mgtdev->mgtdev);
--
2.25.4