2 * Copyright (C) 2017 Netronome Systems, Inc.
4 * This software is dual licensed under the GNU General License Version 2,
5 * June 1991 as shown in the file COPYING in the top-level directory of this
6 * source tree or the BSD 2-Clause License provided below. You have the
7 * option to license this software under the complete terms of either license.
9 * The BSD 2-Clause License:
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12 * without modification, are permitted provided that the following
15 * 1. Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * 2. Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <net/pkt_cls.h>
36 #include "../nfpcore/nfp_cpp.h"
37 #include "../nfp_app.h"
38 #include "../nfp_main.h"
39 #include "../nfp_net.h"
40 #include "../nfp_port.h"
43 static bool nfp_net_ebpf_capable(struct nfp_net *nn)
45 #ifdef __LITTLE_ENDIAN
46 if (nn->cap & NFP_NET_CFG_CTRL_BPF &&
47 nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI)
54 nfp_bpf_xdp_offload(struct nfp_app *app, struct nfp_net *nn,
55 struct bpf_prog *prog)
57 bool running, xdp_running;
60 if (!nfp_net_ebpf_capable(nn))
63 running = nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF;
64 xdp_running = running && nn->dp.bpf_offload_xdp;
66 if (!prog && !xdp_running)
68 if (prog && running && !xdp_running)
71 ret = nfp_net_bpf_offload(nn, prog, running);
72 /* Stop offload if replace not possible */
74 nfp_bpf_xdp_offload(app, nn, NULL);
76 nn->dp.bpf_offload_xdp = prog && !ret;
80 static const char *nfp_bpf_extra_cap(struct nfp_app *app, struct nfp_net *nn)
82 return nfp_net_ebpf_capable(nn) ? "BPF" : "";
86 nfp_bpf_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
90 nn->app_priv = kzalloc(sizeof(struct nfp_bpf_vnic), GFP_KERNEL);
94 err = nfp_app_nic_vnic_alloc(app, nn, id);
104 static void nfp_bpf_vnic_free(struct nfp_app *app, struct nfp_net *nn)
106 struct nfp_bpf_vnic *bv = nn->app_priv;
108 if (nn->dp.bpf_offload_xdp)
109 nfp_bpf_xdp_offload(app, nn, NULL);
110 WARN_ON(bv->tc_prog);
114 static int nfp_bpf_setup_tc_block_cb(enum tc_setup_type type,
115 void *type_data, void *cb_priv)
117 struct tc_cls_bpf_offload *cls_bpf = type_data;
118 struct nfp_net *nn = cb_priv;
119 struct bpf_prog *oldprog;
120 struct nfp_bpf_vnic *bv;
123 if (type != TC_SETUP_CLSBPF ||
124 !tc_can_offload(nn->dp.netdev) ||
125 !nfp_net_ebpf_capable(nn) ||
126 cls_bpf->common.protocol != htons(ETH_P_ALL) ||
127 cls_bpf->common.chain_index)
130 /* Only support TC direct action */
131 if (!cls_bpf->exts_integrated ||
132 tcf_exts_has_actions(cls_bpf->exts)) {
133 nn_err(nn, "only direct action with no legacy actions supported\n");
137 if (cls_bpf->command != TC_CLSBPF_OFFLOAD)
141 oldprog = cls_bpf->oldprog;
143 /* Don't remove if oldprog doesn't match driver's state */
144 if (bv->tc_prog != oldprog) {
150 err = nfp_net_bpf_offload(nn, cls_bpf->prog, oldprog);
154 bv->tc_prog = cls_bpf->prog;
158 static int nfp_bpf_setup_tc_block(struct net_device *netdev,
159 struct tc_block_offload *f)
161 struct nfp_net *nn = netdev_priv(netdev);
163 if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
166 switch (f->command) {
168 return tcf_block_cb_register(f->block,
169 nfp_bpf_setup_tc_block_cb,
171 case TC_BLOCK_UNBIND:
172 tcf_block_cb_unregister(f->block,
173 nfp_bpf_setup_tc_block_cb,
181 static int nfp_bpf_setup_tc(struct nfp_app *app, struct net_device *netdev,
182 enum tc_setup_type type, void *type_data)
186 return nfp_bpf_setup_tc_block(netdev, type_data);
192 static bool nfp_bpf_tc_busy(struct nfp_app *app, struct nfp_net *nn)
194 return nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF;
197 const struct nfp_app_type app_bpf = {
198 .id = NFP_APP_BPF_NIC,
201 .extra_cap = nfp_bpf_extra_cap,
203 .vnic_alloc = nfp_bpf_vnic_alloc,
204 .vnic_free = nfp_bpf_vnic_free,
206 .setup_tc = nfp_bpf_setup_tc,
207 .tc_busy = nfp_bpf_tc_busy,
208 .xdp_offload = nfp_bpf_xdp_offload,
210 .bpf_verifier_prep = nfp_bpf_verifier_prep,
211 .bpf_translate = nfp_bpf_translate,
212 .bpf_destroy = nfp_bpf_destroy,