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cxgb4: add tc flower match support for vlan 

Add support for matching on vlan tci.  Construct vlan tci match param
based on vlan-id and vlan-pcp values supplied by tc.

Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kumar Sanghvi 2017-10-18 20:49:08 +05:30 committed by David S. Miller
parent bda1e22915
commit ad9af3e09c
1 changed files with 35 additions and 0 deletions
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35
drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
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@ -160,6 +160,40 @@ static void cxgb4_process_flow_match(struct net_device *dev,
fs->mask.tos = mask->tos;
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
struct flow_dissector_key_vlan *key, *mask;
u16 vlan_tci, vlan_tci_mask;
key = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_VLAN,
cls->key);
mask = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_VLAN,
cls->mask);
vlan_tci = key->vlan_id | (key->vlan_priority <<
VLAN_PRIO_SHIFT);
vlan_tci_mask = mask->vlan_id | (mask->vlan_priority <<
VLAN_PRIO_SHIFT);
fs->val.ivlan = cpu_to_be16(vlan_tci);
fs->mask.ivlan = cpu_to_be16(vlan_tci_mask);
/* Chelsio adapters use ivlan_vld bit to match vlan packets
* as 802.1Q. Also, when vlan tag is present in packets,
* ethtype match is used then to match on ethtype of inner
* header ie. the header following the vlan header.
* So, set the ivlan_vld based on ethtype info supplied by
* TC for vlan packets if its 802.1Q. And then reset the
* ethtype value else, hw will try to match the supplied
* ethtype value with ethtype of inner header.
*/
if (fs->val.ethtype == ETH_P_8021Q) {
fs->val.ivlan_vld = 1;
fs->mask.ivlan_vld = 1;
fs->val.ethtype = 0;
fs->mask.ethtype = 0;
}
}
/* Match only packets coming from the ingress port where this
* filter will be created.
*/
@ -179,6 +213,7 @@ static int cxgb4_validate_flow_match(struct net_device *dev,
BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_PORTS) |
BIT(FLOW_DISSECTOR_KEY_VLAN) |
BIT(FLOW_DISSECTOR_KEY_IP))) {
netdev_warn(dev, "Unsupported key used: 0x%x\n",
cls->dissector->used_keys);