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