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authorVinicius Costa Gomes <vinicius.gomes@intel.com>2018-04-10 10:49:59 -0700
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2018-04-25 11:07:51 -0700
commite086be9ab21cc2a0894e0f72ff8c974aba0b296e (patch)
tree6d7e8e8b23e29f8cab210e46fe41cad02e3c83af /drivers/net/ethernet/intel/igb/igb_main.c
parentigb: Add the skeletons for tc-flower offloading (diff)
downloadlinux-dev-e086be9ab21cc2a0894e0f72ff8c974aba0b296e.tar.xz
linux-dev-e086be9ab21cc2a0894e0f72ff8c974aba0b296e.zip
igb: Add support for adding offloaded clsflower filters
This allows filters added by tc-flower and specifying MAC addresses, Ethernet types, and the VLAN priority field, to be offloaded to the controller. This reuses most of the infrastructure used by ethtool, but clsflower filters are kept in a separated list, so they are invisible to ethtool. To setup clsflower offloading: $ tc qdisc replace dev eth0 handle 100: parent root mqprio \ num_tc 3 map 2 2 1 0 2 2 2 2 2 2 2 2 2 2 2 2 \ queues 1@0 1@1 2@2 hw 0 (clsflower offloading depends on the netword driver to be configured with multiple traffic classes, we use mqprio's 'num_tc' parameter to set it to 3) $ tc qdisc add dev eth0 ingress Examples of filters: $ tc filter add dev eth0 parent ffff: flower \ dst_mac aa:aa:aa:aa:aa:aa \ hw_tc 2 skip_sw (just a simple filter filtering for the destination MAC address and steering that traffic to queue 2) $ tc filter add dev enp2s0 parent ffff: proto 0x22f0 flower \ src_mac cc:cc:cc:cc:cc:cc \ hw_tc 1 skip_sw (as the i210 doesn't support steering traffic based on the source address alone, we need to use another steering traffic, in this case we are using the ethernet type (0x22f0) to steer traffic to queue 1) Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_main.c')
-rw-r--r--drivers/net/ethernet/intel/igb/igb_main.c188
1 files changed, 186 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 26b0f0efc97e..3ce43207a35f 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -2514,16 +2514,197 @@ static int igb_offload_cbs(struct igb_adapter *adapter,
return 0;
}
+#define ETHER_TYPE_FULL_MASK ((__force __be16)~0)
+#define VLAN_PRIO_FULL_MASK (0x07)
+
+static int igb_parse_cls_flower(struct igb_adapter *adapter,
+ struct tc_cls_flower_offload *f,
+ int traffic_class,
+ struct igb_nfc_filter *input)
+{
+ struct netlink_ext_ack *extack = f->common.extack;
+
+ if (f->dissector->used_keys &
+ ~(BIT(FLOW_DISSECTOR_KEY_BASIC) |
+ BIT(FLOW_DISSECTOR_KEY_CONTROL) |
+ BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
+ BIT(FLOW_DISSECTOR_KEY_VLAN))) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Unsupported key used, only BASIC, CONTROL, ETH_ADDRS and VLAN are supported");
+ return -EOPNOTSUPP;
+ }
+
+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
+ struct flow_dissector_key_eth_addrs *key, *mask;
+
+ key = skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_ETH_ADDRS,
+ f->key);
+ mask = skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_ETH_ADDRS,
+ f->mask);
+
+ if (!is_zero_ether_addr(mask->dst)) {
+ if (!is_broadcast_ether_addr(mask->dst)) {
+ NL_SET_ERR_MSG_MOD(extack, "Only full masks are supported for destination MAC address");
+ return -EINVAL;
+ }
+
+ input->filter.match_flags |=
+ IGB_FILTER_FLAG_DST_MAC_ADDR;
+ ether_addr_copy(input->filter.dst_addr, key->dst);
+ }
+
+ if (!is_zero_ether_addr(mask->src)) {
+ if (!is_broadcast_ether_addr(mask->src)) {
+ NL_SET_ERR_MSG_MOD(extack, "Only full masks are supported for source MAC address");
+ return -EINVAL;
+ }
+
+ input->filter.match_flags |=
+ IGB_FILTER_FLAG_SRC_MAC_ADDR;
+ ether_addr_copy(input->filter.src_addr, key->src);
+ }
+ }
+
+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
+ struct flow_dissector_key_basic *key, *mask;
+
+ key = skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_BASIC,
+ f->key);
+ mask = skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_BASIC,
+ f->mask);
+
+ if (mask->n_proto) {
+ if (mask->n_proto != ETHER_TYPE_FULL_MASK) {
+ NL_SET_ERR_MSG_MOD(extack, "Only full mask is supported for EtherType filter");
+ return -EINVAL;
+ }
+
+ input->filter.match_flags |= IGB_FILTER_FLAG_ETHER_TYPE;
+ input->filter.etype = key->n_proto;
+ }
+ }
+
+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
+ struct flow_dissector_key_vlan *key, *mask;
+
+ key = skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_VLAN,
+ f->key);
+ mask = skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_VLAN,
+ f->mask);
+
+ if (mask->vlan_priority) {
+ if (mask->vlan_priority != VLAN_PRIO_FULL_MASK) {
+ NL_SET_ERR_MSG_MOD(extack, "Only full mask is supported for VLAN priority");
+ return -EINVAL;
+ }
+
+ input->filter.match_flags |= IGB_FILTER_FLAG_VLAN_TCI;
+ input->filter.vlan_tci = key->vlan_priority;
+ }
+ }
+
+ input->action = traffic_class;
+ input->cookie = f->cookie;
+
+ return 0;
+}
+
static int igb_configure_clsflower(struct igb_adapter *adapter,
struct tc_cls_flower_offload *cls_flower)
{
- return -EOPNOTSUPP;
+ struct netlink_ext_ack *extack = cls_flower->common.extack;
+ struct igb_nfc_filter *filter, *f;
+ int err, tc;
+
+ tc = tc_classid_to_hwtc(adapter->netdev, cls_flower->classid);
+ if (tc < 0) {
+ NL_SET_ERR_MSG_MOD(extack, "Invalid traffic class");
+ return -EINVAL;
+ }
+
+ filter = kzalloc(sizeof(*filter), GFP_KERNEL);
+ if (!filter)
+ return -ENOMEM;
+
+ err = igb_parse_cls_flower(adapter, cls_flower, tc, filter);
+ if (err < 0)
+ goto err_parse;
+
+ spin_lock(&adapter->nfc_lock);
+
+ hlist_for_each_entry(f, &adapter->nfc_filter_list, nfc_node) {
+ if (!memcmp(&f->filter, &filter->filter, sizeof(f->filter))) {
+ err = -EEXIST;
+ NL_SET_ERR_MSG_MOD(extack,
+ "This filter is already set in ethtool");
+ goto err_locked;
+ }
+ }
+
+ hlist_for_each_entry(f, &adapter->cls_flower_list, nfc_node) {
+ if (!memcmp(&f->filter, &filter->filter, sizeof(f->filter))) {
+ err = -EEXIST;
+ NL_SET_ERR_MSG_MOD(extack,
+ "This filter is already set in cls_flower");
+ goto err_locked;
+ }
+ }
+
+ err = igb_add_filter(adapter, filter);
+ if (err < 0) {
+ NL_SET_ERR_MSG_MOD(extack, "Could not add filter to the adapter");
+ goto err_locked;
+ }
+
+ hlist_add_head(&filter->nfc_node, &adapter->cls_flower_list);
+
+ spin_unlock(&adapter->nfc_lock);
+
+ return 0;
+
+err_locked:
+ spin_unlock(&adapter->nfc_lock);
+
+err_parse:
+ kfree(filter);
+
+ return err;
}
static int igb_delete_clsflower(struct igb_adapter *adapter,
struct tc_cls_flower_offload *cls_flower)
{
- return -EOPNOTSUPP;
+ struct igb_nfc_filter *filter;
+ int err;
+
+ spin_lock(&adapter->nfc_lock);
+
+ hlist_for_each_entry(filter, &adapter->cls_flower_list, nfc_node)
+ if (filter->cookie == cls_flower->cookie)
+ break;
+
+ if (!filter) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ err = igb_erase_filter(adapter, filter);
+ if (err < 0)
+ goto out;
+
+ hlist_del(&filter->nfc_node);
+ kfree(filter);
+
+out:
+ spin_unlock(&adapter->nfc_lock);
+
+ return err;
}
static int igb_setup_tc_cls_flower(struct igb_adapter *adapter,
@@ -9368,6 +9549,9 @@ static void igb_nfc_filter_exit(struct igb_adapter *adapter)
hlist_for_each_entry(rule, &adapter->nfc_filter_list, nfc_node)
igb_erase_filter(adapter, rule);
+ hlist_for_each_entry(rule, &adapter->cls_flower_list, nfc_node)
+ igb_erase_filter(adapter, rule);
+
spin_unlock(&adapter->nfc_lock);
}