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295 lines
8.8 KiB
295 lines
8.8 KiB
/*
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* Copyright (C) 2017 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/bitfield.h>
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#include <net/pkt_cls.h>
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#include "cmsg.h"
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#include "main.h"
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static void
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nfp_flower_compile_meta_tci(struct nfp_flower_meta_two *frame,
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struct tc_cls_flower_offload *flow, u8 key_type,
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bool mask_version)
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{
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struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
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struct flow_dissector_key_vlan *flow_vlan;
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u16 tmp_tci;
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memset(frame, 0, sizeof(struct nfp_flower_meta_two));
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/* Populate the metadata frame. */
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frame->nfp_flow_key_layer = key_type;
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frame->mask_id = ~0;
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if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
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flow_vlan = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_VLAN,
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target);
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/* Populate the tci field. */
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if (flow_vlan->vlan_id) {
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tmp_tci = FIELD_PREP(NFP_FLOWER_MASK_VLAN_PRIO,
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flow_vlan->vlan_priority) |
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FIELD_PREP(NFP_FLOWER_MASK_VLAN_VID,
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flow_vlan->vlan_id) |
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NFP_FLOWER_MASK_VLAN_CFI;
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frame->tci = cpu_to_be16(tmp_tci);
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}
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}
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}
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static void
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nfp_flower_compile_meta(struct nfp_flower_meta_one *frame, u8 key_type)
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{
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frame->nfp_flow_key_layer = key_type;
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frame->mask_id = 0;
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frame->reserved = 0;
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}
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static int
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nfp_flower_compile_port(struct nfp_flower_in_port *frame, u32 cmsg_port,
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bool mask_version)
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{
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if (mask_version) {
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frame->in_port = cpu_to_be32(~0);
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return 0;
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}
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frame->in_port = cpu_to_be32(cmsg_port);
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return 0;
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}
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static void
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nfp_flower_compile_mac(struct nfp_flower_mac_mpls *frame,
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struct tc_cls_flower_offload *flow,
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bool mask_version)
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{
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struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
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struct flow_dissector_key_eth_addrs *addr;
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memset(frame, 0, sizeof(struct nfp_flower_mac_mpls));
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if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
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addr = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_ETH_ADDRS,
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target);
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/* Populate mac frame. */
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ether_addr_copy(frame->mac_dst, &addr->dst[0]);
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ether_addr_copy(frame->mac_src, &addr->src[0]);
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}
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if (mask_version)
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frame->mpls_lse = cpu_to_be32(~0);
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}
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static void
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nfp_flower_compile_tport(struct nfp_flower_tp_ports *frame,
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struct tc_cls_flower_offload *flow,
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bool mask_version)
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{
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struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
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struct flow_dissector_key_ports *tp;
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memset(frame, 0, sizeof(struct nfp_flower_tp_ports));
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if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
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tp = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_PORTS,
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target);
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frame->port_src = tp->src;
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frame->port_dst = tp->dst;
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}
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}
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static void
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nfp_flower_compile_ipv4(struct nfp_flower_ipv4 *frame,
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struct tc_cls_flower_offload *flow,
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bool mask_version)
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{
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struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
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struct flow_dissector_key_ipv4_addrs *addr;
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struct flow_dissector_key_basic *basic;
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/* Wildcard TOS/TTL for now. */
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memset(frame, 0, sizeof(struct nfp_flower_ipv4));
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if (dissector_uses_key(flow->dissector,
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FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
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addr = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_IPV4_ADDRS,
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target);
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frame->ipv4_src = addr->src;
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frame->ipv4_dst = addr->dst;
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}
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if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
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basic = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_BASIC,
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target);
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frame->proto = basic->ip_proto;
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}
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}
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static void
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nfp_flower_compile_ipv6(struct nfp_flower_ipv6 *frame,
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struct tc_cls_flower_offload *flow,
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bool mask_version)
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{
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struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
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struct flow_dissector_key_ipv6_addrs *addr;
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struct flow_dissector_key_basic *basic;
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/* Wildcard LABEL/TOS/TTL for now. */
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memset(frame, 0, sizeof(struct nfp_flower_ipv6));
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if (dissector_uses_key(flow->dissector,
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FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
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addr = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_IPV6_ADDRS,
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target);
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frame->ipv6_src = addr->src;
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frame->ipv6_dst = addr->dst;
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}
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if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
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basic = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_BASIC,
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target);
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frame->proto = basic->ip_proto;
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}
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}
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int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow,
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struct nfp_fl_key_ls *key_ls,
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struct net_device *netdev,
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struct nfp_fl_payload *nfp_flow)
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{
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int err;
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u8 *ext;
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u8 *msk;
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memset(nfp_flow->unmasked_data, 0, key_ls->key_size);
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memset(nfp_flow->mask_data, 0, key_ls->key_size);
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ext = nfp_flow->unmasked_data;
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msk = nfp_flow->mask_data;
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if (NFP_FLOWER_LAYER_PORT & key_ls->key_layer) {
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/* Populate Exact Metadata. */
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nfp_flower_compile_meta_tci((struct nfp_flower_meta_two *)ext,
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flow, key_ls->key_layer, false);
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/* Populate Mask Metadata. */
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nfp_flower_compile_meta_tci((struct nfp_flower_meta_two *)msk,
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flow, key_ls->key_layer, true);
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ext += sizeof(struct nfp_flower_meta_two);
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msk += sizeof(struct nfp_flower_meta_two);
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/* Populate Exact Port data. */
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err = nfp_flower_compile_port((struct nfp_flower_in_port *)ext,
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nfp_repr_get_port_id(netdev),
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false);
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if (err)
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return err;
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/* Populate Mask Port Data. */
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err = nfp_flower_compile_port((struct nfp_flower_in_port *)msk,
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nfp_repr_get_port_id(netdev),
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true);
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if (err)
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return err;
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ext += sizeof(struct nfp_flower_in_port);
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msk += sizeof(struct nfp_flower_in_port);
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} else {
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/* Populate Exact Metadata. */
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nfp_flower_compile_meta((struct nfp_flower_meta_one *)ext,
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key_ls->key_layer);
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/* Populate Mask Metadata. */
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nfp_flower_compile_meta((struct nfp_flower_meta_one *)msk,
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key_ls->key_layer);
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ext += sizeof(struct nfp_flower_meta_one);
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msk += sizeof(struct nfp_flower_meta_one);
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}
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if (NFP_FLOWER_LAYER_META & key_ls->key_layer) {
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/* Additional Metadata Fields.
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* Currently unsupported.
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*/
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return -EOPNOTSUPP;
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}
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if (NFP_FLOWER_LAYER_MAC & key_ls->key_layer) {
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/* Populate Exact MAC Data. */
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nfp_flower_compile_mac((struct nfp_flower_mac_mpls *)ext,
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flow, false);
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/* Populate Mask MAC Data. */
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nfp_flower_compile_mac((struct nfp_flower_mac_mpls *)msk,
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flow, true);
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ext += sizeof(struct nfp_flower_mac_mpls);
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msk += sizeof(struct nfp_flower_mac_mpls);
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}
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if (NFP_FLOWER_LAYER_TP & key_ls->key_layer) {
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/* Populate Exact TP Data. */
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nfp_flower_compile_tport((struct nfp_flower_tp_ports *)ext,
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flow, false);
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/* Populate Mask TP Data. */
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nfp_flower_compile_tport((struct nfp_flower_tp_ports *)msk,
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flow, true);
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ext += sizeof(struct nfp_flower_tp_ports);
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msk += sizeof(struct nfp_flower_tp_ports);
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}
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if (NFP_FLOWER_LAYER_IPV4 & key_ls->key_layer) {
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/* Populate Exact IPv4 Data. */
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nfp_flower_compile_ipv4((struct nfp_flower_ipv4 *)ext,
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flow, false);
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/* Populate Mask IPv4 Data. */
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nfp_flower_compile_ipv4((struct nfp_flower_ipv4 *)msk,
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flow, true);
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ext += sizeof(struct nfp_flower_ipv4);
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msk += sizeof(struct nfp_flower_ipv4);
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}
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if (NFP_FLOWER_LAYER_IPV6 & key_ls->key_layer) {
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/* Populate Exact IPv4 Data. */
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nfp_flower_compile_ipv6((struct nfp_flower_ipv6 *)ext,
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flow, false);
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/* Populate Mask IPv4 Data. */
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nfp_flower_compile_ipv6((struct nfp_flower_ipv6 *)msk,
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flow, true);
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ext += sizeof(struct nfp_flower_ipv6);
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msk += sizeof(struct nfp_flower_ipv6);
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}
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return 0;
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}
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