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net/mlx4_en: adding loopback support

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Device must be in promiscuous mode or DMAC must be same as the host MAC, or
else packet will be dropped by the HW rx filtering.

Signed-off-by: Amir Vadai <amirv@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amir Vadai 2011-11-26 19:55:19 +00:00 committed by David S. Miller
parent 559a9f1d35
commit 60d6fe99e4
4 changed files with 22 additions and 2 deletions
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19
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
View file

@ -974,6 +974,21 @@ static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
return 0;
}
static int mlx4_en_set_features(struct net_device *netdev,
netdev_features_t features)
{
struct mlx4_en_priv *priv = netdev_priv(netdev);
if (features & NETIF_F_LOOPBACK)
priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
else
priv->ctrl_flags &=
cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
return 0;
}
static const struct net_device_ops mlx4_netdev_ops = {
.ndo_open = mlx4_en_open,
.ndo_stop = mlx4_en_close,
@ -990,6 +1005,7 @@ static const struct net_device_ops mlx4_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = mlx4_en_netpoll,
#endif
.ndo_set_features = mlx4_en_set_features,
};
int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
@ -1022,6 +1038,8 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
priv->port = port;
priv->port_up = false;
priv->flags = prof->flags;
priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
MLX4_WQE_CTRL_SOLICITED);
priv->tx_ring_num = prof->tx_ring_num;
priv->rx_ring_num = prof->rx_ring_num;
priv->mac_index = -1;
@ -1088,6 +1106,7 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
dev->features = dev->hw_features | NETIF_F_HIGHDMA |
NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
NETIF_F_HW_VLAN_FILTER;
dev->hw_features |= NETIF_F_LOOPBACK;
mdev->pndev[port] = dev;

3
drivers/net/ethernet/mellanox/mlx4/en_tx.c
View file

@ -679,8 +679,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
tx_desc->ctrl.vlan_tag = cpu_to_be16(vlan_tag);
tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_VLAN * !!vlan_tag;
tx_desc->ctrl.fence_size = (real_size / 16) & 0x3f;
tx_desc->ctrl.srcrb_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
MLX4_WQE_CTRL_SOLICITED);
tx_desc->ctrl.srcrb_flags = priv->ctrl_flags;
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
MLX4_WQE_CTRL_TCP_UDP_CSUM);

1
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
View file

@ -453,6 +453,7 @@ struct mlx4_en_priv {
int base_qpn;
struct mlx4_en_rss_map rss_map;
u32 ctrl_flags;
u32 flags;
#define MLX4_EN_FLAG_PROMISC 0x1
#define MLX4_EN_FLAG_MC_PROMISC 0x2

1
include/linux/mlx4/qp.h
View file

@ -210,6 +210,7 @@ struct mlx4_wqe_ctrl_seg {
* [4] IP checksum
* [3:2] C (generate completion queue entry)
* [1] SE (solicited event)
* [0] FL (force loopback)
*/
__be32 srcrb_flags;
/*