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author | Florian Fainelli <f.fainelli@gmail.com> | 2014-08-27 17:04:46 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2014-08-27 22:59:39 -0700 |
commit | 3e8a72d1dae374cf6fc1dba97cec663585845ff9 (patch) | |
tree | 83a2ebc590d0dc90d27515dc15bf6323cb2a6c1b /net/dsa/slave.c | |
parent | 8663dc2002b02abfe5dfb0fb7e544b81982ad95b (diff) | |
download | op-kernel-dev-3e8a72d1dae374cf6fc1dba97cec663585845ff9.zip op-kernel-dev-3e8a72d1dae374cf6fc1dba97cec663585845ff9.tar.gz |
net: dsa: reduce number of protocol hooks
DSA is currently registering one packet_type function per EtherType it
needs to intercept in the receive path of a DSA-enabled Ethernet device.
Right now we have three of them: trailer, DSA and eDSA, and there might
be more in the future, this will not scale to the addition of new
protocols.
This patch proceeds with adding a new layer of abstraction and two new
functions:
dsa_switch_rcv() which will dispatch into the tag-protocol specific
receive function implemented by net/dsa/tag_*.c
dsa_slave_xmit() which will dispatch into the tag-protocol specific
transmit function implemented by net/dsa/tag_*.c
When we do create the per-port slave network devices, we iterate over
the switch protocol to assign the DSA-specific receive and transmit
operations.
A new fake ethertype value is used: ETH_P_XDSA to illustrate the fact
that this is no longer going to look like ETH_P_DSA or ETH_P_TRAILER
like it used to be.
This allows us to greatly simplify the check in eth_type_trans() and
always override the skb->protocol with ETH_P_XDSA for Ethernet switches
tagged protocol, while also reducing the number repetitive slave
netdevice_ops assignments.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa/slave.c')
-rw-r--r-- | net/dsa/slave.c | 45 |
1 files changed, 14 insertions, 31 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c index 45a1e34..ad1a913 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -171,6 +171,14 @@ static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) return -EOPNOTSUPP; } +static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct dsa_slave_priv *p = netdev_priv(dev); + struct dsa_switch_tree *dst = p->parent->dst; + + return dst->ops->xmit(skb, dev); +} + /* ethtool operations *******************************************************/ static int @@ -293,42 +301,16 @@ static const struct ethtool_ops dsa_slave_ethtool_ops = { .get_sset_count = dsa_slave_get_sset_count, }; -#ifdef CONFIG_NET_DSA_TAG_DSA -static const struct net_device_ops dsa_netdev_ops = { +static const struct net_device_ops dsa_slave_netdev_ops = { .ndo_init = dsa_slave_init, .ndo_open = dsa_slave_open, .ndo_stop = dsa_slave_close, - .ndo_start_xmit = dsa_xmit, + .ndo_start_xmit = dsa_slave_xmit, .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, .ndo_do_ioctl = dsa_slave_ioctl, }; -#endif -#ifdef CONFIG_NET_DSA_TAG_EDSA -static const struct net_device_ops edsa_netdev_ops = { - .ndo_init = dsa_slave_init, - .ndo_open = dsa_slave_open, - .ndo_stop = dsa_slave_close, - .ndo_start_xmit = edsa_xmit, - .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, - .ndo_do_ioctl = dsa_slave_ioctl, -}; -#endif -#ifdef CONFIG_NET_DSA_TAG_TRAILER -static const struct net_device_ops trailer_netdev_ops = { - .ndo_init = dsa_slave_init, - .ndo_open = dsa_slave_open, - .ndo_stop = dsa_slave_close, - .ndo_start_xmit = trailer_xmit, - .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, - .ndo_do_ioctl = dsa_slave_ioctl, -}; -#endif /* slave device setup *******************************************************/ struct net_device * @@ -349,21 +331,22 @@ dsa_slave_create(struct dsa_switch *ds, struct device *parent, slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; eth_hw_addr_inherit(slave_dev, master); slave_dev->tx_queue_len = 0; + slave_dev->netdev_ops = &dsa_slave_netdev_ops; switch (ds->dst->tag_protocol) { #ifdef CONFIG_NET_DSA_TAG_DSA case htons(ETH_P_DSA): - slave_dev->netdev_ops = &dsa_netdev_ops; + ds->dst->ops = &dsa_netdev_ops; break; #endif #ifdef CONFIG_NET_DSA_TAG_EDSA case htons(ETH_P_EDSA): - slave_dev->netdev_ops = &edsa_netdev_ops; + ds->dst->ops = &edsa_netdev_ops; break; #endif #ifdef CONFIG_NET_DSA_TAG_TRAILER case htons(ETH_P_TRAILER): - slave_dev->netdev_ops = &trailer_netdev_ops; + ds->dst->ops = &trailer_netdev_ops; break; #endif default: |