1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* 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 <net/pkt_cls.h>
#include "../nfpcore/nfp_cpp.h"
#include "../nfp_app.h"
#include "../nfp_main.h"
#include "../nfp_net.h"
#include "../nfp_port.h"
#include "main.h"
static bool nfp_net_ebpf_capable(struct nfp_net *nn)
{
if (nn->cap & NFP_NET_CFG_CTRL_BPF &&
nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI)
return true;
return false;
}
static int
nfp_bpf_xdp_offload(struct nfp_app *app, struct nfp_net *nn,
struct bpf_prog *prog)
{
struct tc_cls_bpf_offload cmd = {
.prog = prog,
};
int ret;
if (!nfp_net_ebpf_capable(nn))
return -EINVAL;
if (nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF) {
if (!nn->dp.bpf_offload_xdp)
return prog ? -EBUSY : 0;
cmd.command = prog ? TC_CLSBPF_REPLACE : TC_CLSBPF_DESTROY;
} else {
if (!prog)
return 0;
cmd.command = TC_CLSBPF_ADD;
}
ret = nfp_net_bpf_offload(nn, &cmd);
/* Stop offload if replace not possible */
if (ret && cmd.command == TC_CLSBPF_REPLACE)
nfp_bpf_xdp_offload(app, nn, NULL);
nn->dp.bpf_offload_xdp = prog && !ret;
return ret;
}
static const char *nfp_bpf_extra_cap(struct nfp_app *app, struct nfp_net *nn)
{
return nfp_net_ebpf_capable(nn) ? "BPF" : "";
}
static int
nfp_bpf_vnic_init(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
{
struct nfp_net_bpf_priv *priv;
int ret;
/* Limit to single port, otherwise it's just a NIC */
if (id > 0) {
nfp_warn(app->cpp,
"BPF NIC doesn't support more than one port right now\n");
nn->port = nfp_port_alloc(app, NFP_PORT_INVALID, nn->dp.netdev);
return PTR_ERR_OR_ZERO(nn->port);
}
priv = kmalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
nn->app_priv = priv;
spin_lock_init(&priv->rx_filter_lock);
setup_timer(&priv->rx_filter_stats_timer,
nfp_net_filter_stats_timer, (unsigned long)nn);
ret = nfp_app_nic_vnic_init(app, nn, id);
if (ret)
kfree(priv);
return ret;
}
static void nfp_bpf_vnic_clean(struct nfp_app *app, struct nfp_net *nn)
{
if (nn->dp.bpf_offload_xdp)
nfp_bpf_xdp_offload(app, nn, NULL);
kfree(nn->app_priv);
}
static int nfp_bpf_setup_tc(struct nfp_app *app, struct net_device *netdev,
enum tc_setup_type type,
struct tc_to_netdev *tc)
{
struct tc_cls_bpf_offload *cls_bpf = tc->cls_bpf;
struct nfp_net *nn = netdev_priv(netdev);
if (type != TC_SETUP_CLSBPF || !nfp_net_ebpf_capable(nn) ||
TC_H_MAJ(cls_bpf->common.handle) != TC_H_MAJ(TC_H_INGRESS) ||
cls_bpf->common.protocol != htons(ETH_P_ALL) ||
cls_bpf->common.chain_index)
return -EOPNOTSUPP;
if (nn->dp.bpf_offload_xdp)
return -EBUSY;
return nfp_net_bpf_offload(nn, cls_bpf);
}
static bool nfp_bpf_tc_busy(struct nfp_app *app, struct nfp_net *nn)
{
return nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF;
}
const struct nfp_app_type app_bpf = {
.id = NFP_APP_BPF_NIC,
.name = "ebpf",
.extra_cap = nfp_bpf_extra_cap,
.vnic_init = nfp_bpf_vnic_init,
.vnic_clean = nfp_bpf_vnic_clean,
.setup_tc = nfp_bpf_setup_tc,
.tc_busy = nfp_bpf_tc_busy,
.xdp_offload = nfp_bpf_xdp_offload,
};
|
