diff options
Diffstat (limited to 'drivers/net/ethernet/qualcomm')
4 files changed, 122 insertions, 6 deletions
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c index b5fe3f4d22a6..71bee1af71ef 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c @@ -109,6 +109,36 @@ static int rmnet_register_real_device(struct net_device *real_dev) return 0; } +static void rmnet_unregister_bridge(struct net_device *dev, + struct rmnet_port *port) +{ + struct net_device *rmnet_dev, *bridge_dev; + struct rmnet_port *bridge_port; + + if (port->rmnet_mode != RMNET_EPMODE_BRIDGE) + return; + + /* bridge slave handling */ + if (!port->nr_rmnet_devs) { + rmnet_dev = netdev_master_upper_dev_get_rcu(dev); + netdev_upper_dev_unlink(dev, rmnet_dev); + + bridge_dev = port->bridge_ep; + + bridge_port = rmnet_get_port_rtnl(bridge_dev); + bridge_port->bridge_ep = NULL; + bridge_port->rmnet_mode = RMNET_EPMODE_VND; + } else { + bridge_dev = port->bridge_ep; + + bridge_port = rmnet_get_port_rtnl(bridge_dev); + rmnet_dev = netdev_master_upper_dev_get_rcu(bridge_dev); + netdev_upper_dev_unlink(bridge_dev, rmnet_dev); + + rmnet_unregister_real_device(bridge_dev, bridge_port); + } +} + static int rmnet_newlink(struct net *src_net, struct net_device *dev, struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) @@ -190,10 +220,10 @@ static void rmnet_dellink(struct net_device *dev, struct list_head *head) ep = rmnet_get_endpoint(port, mux_id); if (ep) { hlist_del_init_rcu(&ep->hlnode); + rmnet_unregister_bridge(dev, port); rmnet_vnd_dellink(mux_id, port, ep); kfree(ep); } - rmnet_unregister_real_device(real_dev, port); unregister_netdevice_queue(dev, head); @@ -237,6 +267,8 @@ static void rmnet_force_unassociate_device(struct net_device *dev) d.port = port; rcu_read_lock(); + rmnet_unregister_bridge(dev, port); + netdev_walk_all_lower_dev_rcu(real_dev, rmnet_dev_walk_unreg, &d); rcu_read_unlock(); unregister_netdevice_many(&list); @@ -321,6 +353,65 @@ struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port, u8 mux_id) return NULL; } +int rmnet_add_bridge(struct net_device *rmnet_dev, + struct net_device *slave_dev, + struct netlink_ext_ack *extack) +{ + struct rmnet_priv *priv = netdev_priv(rmnet_dev); + struct net_device *real_dev = priv->real_dev; + struct rmnet_port *port, *slave_port; + int err; + + port = rmnet_get_port(real_dev); + + /* If there is more than one rmnet dev attached, its probably being + * used for muxing. Skip the briding in that case + */ + if (port->nr_rmnet_devs > 1) + return -EINVAL; + + if (rmnet_is_real_dev_registered(slave_dev)) + return -EBUSY; + + err = rmnet_register_real_device(slave_dev); + if (err) + return -EBUSY; + + err = netdev_master_upper_dev_link(slave_dev, rmnet_dev, NULL, NULL, + extack); + if (err) + return -EINVAL; + + slave_port = rmnet_get_port(slave_dev); + slave_port->rmnet_mode = RMNET_EPMODE_BRIDGE; + slave_port->bridge_ep = real_dev; + + port->rmnet_mode = RMNET_EPMODE_BRIDGE; + port->bridge_ep = slave_dev; + + netdev_dbg(slave_dev, "registered with rmnet as slave\n"); + return 0; +} + +int rmnet_del_bridge(struct net_device *rmnet_dev, + struct net_device *slave_dev) +{ + struct rmnet_priv *priv = netdev_priv(rmnet_dev); + struct net_device *real_dev = priv->real_dev; + struct rmnet_port *port, *slave_port; + + port = rmnet_get_port(real_dev); + port->rmnet_mode = RMNET_EPMODE_VND; + port->bridge_ep = NULL; + + netdev_upper_dev_unlink(slave_dev, rmnet_dev); + slave_port = rmnet_get_port(slave_dev); + rmnet_unregister_real_device(slave_dev, slave_port); + + netdev_dbg(slave_dev, "removed from rmnet as slave\n"); + return 0; +} + /* Startup/Shutdown */ static int __init rmnet_init(void) diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h index 8849986980f8..60115e69e415 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.h @@ -36,6 +36,7 @@ struct rmnet_port { u8 nr_rmnet_devs; u8 rmnet_mode; struct hlist_head muxed_ep[RMNET_MAX_LOGICAL_EP]; + struct net_device *bridge_ep; }; extern struct rtnl_link_ops rmnet_link_ops; @@ -47,5 +48,9 @@ struct rmnet_priv { struct rmnet_port *rmnet_get_port(struct net_device *real_dev); struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port, u8 mux_id); - +int rmnet_add_bridge(struct net_device *rmnet_dev, + struct net_device *slave_dev, + struct netlink_ext_ack *extack); +int rmnet_del_bridge(struct net_device *rmnet_dev, + struct net_device *slave_dev); #endif /* _RMNET_CONFIG_H_ */ diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c index fa24ffb69713..df3d2d16ce55 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c @@ -149,6 +149,17 @@ static int rmnet_map_egress_handler(struct sk_buff *skb, return RMNET_MAP_SUCCESS; } +static rx_handler_result_t +rmnet_bridge_handler(struct sk_buff *skb, struct net_device *bridge_dev) +{ + if (bridge_dev) { + skb->dev = bridge_dev; + dev_queue_xmit(skb); + } + + return RX_HANDLER_CONSUMED; +} + /* Ingress / Egress Entry Points */ /* Processes packet as per ingress data format for receiving device. Logical @@ -157,10 +168,10 @@ static int rmnet_map_egress_handler(struct sk_buff *skb, */ rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb) { - struct rmnet_port *port; + int rc = RX_HANDLER_CONSUMED; struct sk_buff *skb = *pskb; + struct rmnet_port *port; struct net_device *dev; - int rc; if (!skb) return RX_HANDLER_CONSUMED; @@ -168,8 +179,15 @@ rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb) dev = skb->dev; port = rmnet_get_port(dev); - if (port->ingress_data_format & RMNET_INGRESS_FORMAT_MAP) - rc = rmnet_map_ingress_handler(skb, port); + switch (port->rmnet_mode) { + case RMNET_EPMODE_VND: + if (port->ingress_data_format & RMNET_INGRESS_FORMAT_MAP) + rc = rmnet_map_ingress_handler(skb, port); + break; + case RMNET_EPMODE_BRIDGE: + rc = rmnet_bridge_handler(skb, port->bridge_ep); + break; + } return rc; } diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c index 1b6747d7154f..12bd0bbd5235 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_vnd.c @@ -74,6 +74,8 @@ static const struct net_device_ops rmnet_vnd_ops = { .ndo_start_xmit = rmnet_vnd_start_xmit, .ndo_change_mtu = rmnet_vnd_change_mtu, .ndo_get_iflink = rmnet_vnd_get_iflink, + .ndo_add_slave = rmnet_add_bridge, + .ndo_del_slave = rmnet_del_bridge, }; /* Called by kernel whenever a new rmnet<n> device is created. Sets MTU, |