Allow DSA drivers to support forward offloading from a bridge by:
- Passing calls to .ndo_dfwd_{add,del}_station to the drivers.
- Recording the subordinate device of offloaded skbs in the control
buffer so that the tagger can take the appropriate action.
Signed-off-by: Tobias Waldekranz <tob...@waldekranz.com>
---
include/net/dsa.h | 7 +++++++
net/dsa/slave.c | 36 ++++++++++++++++++++++++++++++++++--
2 files changed, 41 insertions(+), 2 deletions(-)
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 1f9ba9889034..77d4df819299 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -119,6 +119,7 @@ struct dsa_netdevice_ops {
struct dsa_skb_cb {
struct sk_buff *clone;
+ struct net_device *sb_dev;
};
struct __dsa_skb_cb {
@@ -828,6 +829,12 @@ struct dsa_switch_ops {
const struct
switchdev_obj_ring_role_mrp *mrp);
int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port,
const struct
switchdev_obj_ring_role_mrp *mrp);
+
+ /* L2 forward offloading */
+ void * (*dfwd_add_station)(struct dsa_switch *ds, int port,
+ struct net_device *sb_dev);
+ void (*dfwd_del_station)(struct dsa_switch *ds, int port,
+ struct net_device *sb_dev);
};
#define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 77b33bd161b8..3689ffa2dbb8 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -657,6 +657,13 @@ static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb,
struct net_device *dev)
return dsa_enqueue_skb(nskb, dev);
}
+static u16 dsa_slave_select_queue(struct net_device *dev, struct sk_buff *skb,
+ struct net_device *sb_dev)
+{
+ DSA_SKB_CB(skb)->sb_dev = sb_dev;
+ return netdev_pick_tx(dev, skb, sb_dev);
+}
+
/* ethtool operations *******************************************************/
static void dsa_slave_get_drvinfo(struct net_device *dev,
@@ -1708,10 +1715,33 @@ static int dsa_slave_fill_forward_path(struct
net_device_path_ctx *ctx,
return 0;
}
+static void *dsa_slave_dfwd_add_station(struct net_device *dev,
+ struct net_device *sb_dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->dfwd_add_station)
+ return ds->ops->dfwd_add_station(ds, dp->index, sb_dev);
+
+ return ERR_PTR(-EOPNOTSUPP);
+}
+
+static void dsa_slave_dfwd_del_station(struct net_device *dev,
+ void *sb_dev)
+{
+ struct dsa_port *dp = dsa_slave_to_port(dev);
+ struct dsa_switch *ds = dp->ds;
+
+ if (ds->ops->dfwd_del_station)
+ ds->ops->dfwd_del_station(ds, dp->index, sb_dev);
+}
+
static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_open = dsa_slave_open,
.ndo_stop = dsa_slave_close,
.ndo_start_xmit = dsa_slave_xmit,
+ .ndo_select_queue = dsa_slave_select_queue,
.ndo_change_rx_flags = dsa_slave_change_rx_flags,
.ndo_set_rx_mode = dsa_slave_set_rx_mode,
.ndo_set_mac_address = dsa_slave_set_mac_address,
@@ -1734,6 +1764,8 @@ static const struct net_device_ops dsa_slave_netdev_ops =
{
.ndo_get_devlink_port = dsa_slave_get_devlink_port,
.ndo_change_mtu = dsa_slave_change_mtu,
.ndo_fill_forward_path = dsa_slave_fill_forward_path,
+ .ndo_dfwd_add_station = dsa_slave_dfwd_add_station,
+ .ndo_dfwd_del_station = dsa_slave_dfwd_del_station,
};
static struct device_type dsa_type = {
@@ -1914,8 +1946,8 @@ int dsa_slave_create(struct dsa_port *port)
slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
- slave_dev->hw_features |= NETIF_F_HW_TC;
- slave_dev->features |= NETIF_F_LLTX;
+ slave_dev->hw_features |= NETIF_F_HW_TC | NETIF_F_HW_L2FW_DOFFLOAD;
+ slave_dev->features |= NETIF_F_LLTX | NETIF_F_HW_L2FW_DOFFLOAD;
slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
if (!is_zero_ether_addr(port->mac))
ether_addr_copy(slave_dev->dev_addr, port->mac);
--
2.25.1
