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158 lines
4.3 KiB
158 lines
4.3 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 <net/pkt_cls.h>
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#include "../nfpcore/nfp_cpp.h"
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#include "../nfp_app.h"
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#include "../nfp_main.h"
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#include "../nfp_net.h"
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#include "../nfp_port.h"
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#include "main.h"
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static bool nfp_net_ebpf_capable(struct nfp_net *nn)
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{
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if (nn->cap & NFP_NET_CFG_CTRL_BPF &&
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nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI)
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return true;
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return false;
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}
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static int
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nfp_bpf_xdp_offload(struct nfp_app *app, struct nfp_net *nn,
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struct bpf_prog *prog)
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{
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struct tc_cls_bpf_offload cmd = {
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.prog = prog,
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};
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int ret;
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if (!nfp_net_ebpf_capable(nn))
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return -EINVAL;
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if (nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF) {
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if (!nn->dp.bpf_offload_xdp)
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return prog ? -EBUSY : 0;
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cmd.command = prog ? TC_CLSBPF_REPLACE : TC_CLSBPF_DESTROY;
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} else {
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if (!prog)
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return 0;
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cmd.command = TC_CLSBPF_ADD;
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}
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ret = nfp_net_bpf_offload(nn, &cmd);
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/* Stop offload if replace not possible */
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if (ret && cmd.command == TC_CLSBPF_REPLACE)
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nfp_bpf_xdp_offload(app, nn, NULL);
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nn->dp.bpf_offload_xdp = prog && !ret;
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return ret;
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}
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static const char *nfp_bpf_extra_cap(struct nfp_app *app, struct nfp_net *nn)
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{
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return nfp_net_ebpf_capable(nn) ? "BPF" : "";
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}
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static int
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nfp_bpf_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
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{
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struct nfp_net_bpf_priv *priv;
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int ret;
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/* Limit to single port, otherwise it's just a NIC */
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if (id > 0) {
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nfp_warn(app->cpp,
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"BPF NIC doesn't support more than one port right now\n");
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nn->port = nfp_port_alloc(app, NFP_PORT_INVALID, nn->dp.netdev);
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return PTR_ERR_OR_ZERO(nn->port);
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}
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priv = kmalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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nn->app_priv = priv;
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spin_lock_init(&priv->rx_filter_lock);
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setup_timer(&priv->rx_filter_stats_timer,
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nfp_net_filter_stats_timer, (unsigned long)nn);
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ret = nfp_app_nic_vnic_alloc(app, nn, id);
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if (ret)
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kfree(priv);
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return ret;
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}
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static void nfp_bpf_vnic_free(struct nfp_app *app, struct nfp_net *nn)
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{
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if (nn->dp.bpf_offload_xdp)
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nfp_bpf_xdp_offload(app, nn, NULL);
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kfree(nn->app_priv);
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}
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static int nfp_bpf_setup_tc(struct nfp_app *app, struct net_device *netdev,
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enum tc_setup_type type, void *type_data)
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{
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struct tc_cls_bpf_offload *cls_bpf = type_data;
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struct nfp_net *nn = netdev_priv(netdev);
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if (type != TC_SETUP_CLSBPF || !nfp_net_ebpf_capable(nn) ||
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!is_classid_clsact_ingress(cls_bpf->common.classid) ||
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cls_bpf->common.protocol != htons(ETH_P_ALL) ||
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cls_bpf->common.chain_index)
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return -EOPNOTSUPP;
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if (nn->dp.bpf_offload_xdp)
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return -EBUSY;
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return nfp_net_bpf_offload(nn, cls_bpf);
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}
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static bool nfp_bpf_tc_busy(struct nfp_app *app, struct nfp_net *nn)
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{
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return nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF;
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}
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const struct nfp_app_type app_bpf = {
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.id = NFP_APP_BPF_NIC,
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.name = "ebpf",
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.extra_cap = nfp_bpf_extra_cap,
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.vnic_alloc = nfp_bpf_vnic_alloc,
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.vnic_free = nfp_bpf_vnic_free,
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.setup_tc = nfp_bpf_setup_tc,
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.tc_busy = nfp_bpf_tc_busy,
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.xdp_offload = nfp_bpf_xdp_offload,
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};
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