diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/flower/match.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/flower/match.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/flower/match.c b/drivers/net/ethernet/netronome/nfp/flower/match.c new file mode 100644 index 000000000000..0e08404480ef --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/flower/match.c @@ -0,0 +1,292 @@ +/* + * 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 flow_dissector_key_vlan *flow_vlan; + u16 tmp_tci; + + /* Populate the metadata frame. */ + frame->nfp_flow_key_layer = key_type; + frame->mask_id = ~0; + + if (mask_version) { + frame->tci = cpu_to_be16(~0); + return; + } + + flow_vlan = skb_flow_dissector_target(flow->dissector, + FLOW_DISSECTOR_KEY_VLAN, + flow->key); + + /* Populate the tci field. */ + if (!flow_vlan->vlan_id) { + tmp_tci = 0; + } else { + 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 *flow_mac; + + flow_mac = skb_flow_dissector_target(flow->dissector, + FLOW_DISSECTOR_KEY_ETH_ADDRS, + target); + + memset(frame, 0, sizeof(struct nfp_flower_mac_mpls)); + + /* Populate mac frame. */ + ether_addr_copy(frame->mac_dst, &flow_mac->dst[0]); + ether_addr_copy(frame->mac_src, &flow_mac->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 *flow_tp; + + flow_tp = skb_flow_dissector_target(flow->dissector, + FLOW_DISSECTOR_KEY_PORTS, + target); + + frame->port_src = flow_tp->src; + frame->port_dst = flow_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 *flow_ipv4; + struct flow_dissector_key_basic *flow_basic; + + flow_ipv4 = skb_flow_dissector_target(flow->dissector, + FLOW_DISSECTOR_KEY_IPV4_ADDRS, + target); + + flow_basic = skb_flow_dissector_target(flow->dissector, + FLOW_DISSECTOR_KEY_BASIC, + target); + + /* Populate IPv4 frame. */ + frame->reserved = 0; + frame->ipv4_src = flow_ipv4->src; + frame->ipv4_dst = flow_ipv4->dst; + frame->proto = flow_basic->ip_proto; + /* Wildcard TOS/TTL for now. */ + frame->tos = 0; + frame->ttl = 0; +} + +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 *flow_ipv6; + struct flow_dissector_key_basic *flow_basic; + + flow_ipv6 = skb_flow_dissector_target(flow->dissector, + FLOW_DISSECTOR_KEY_IPV6_ADDRS, + target); + + flow_basic = skb_flow_dissector_target(flow->dissector, + FLOW_DISSECTOR_KEY_BASIC, + target); + + /* Populate IPv6 frame. */ + frame->reserved = 0; + frame->ipv6_src = flow_ipv6->src; + frame->ipv6_dst = flow_ipv6->dst; + frame->proto = flow_basic->ip_proto; + /* Wildcard LABEL/TOS/TTL for now. */ + frame->ipv6_flow_label_exthdr = 0; + frame->tos = 0; + frame->ttl = 0; +} + +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; +} |