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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Microsemi Ocelot Switch TC driver
*
* Copyright (c) 2019 Microsemi Corporation
*/
#include "ocelot_tc.h"
#include "ocelot_police.h"
#include "ocelot_ace.h"
#include <net/pkt_cls.h>
static int ocelot_setup_tc_cls_matchall(struct ocelot_port *port,
struct tc_cls_matchall_offload *f,
bool ingress)
{
struct netlink_ext_ack *extack = f->common.extack;
struct ocelot_policer pol = { 0 };
struct flow_action_entry *action;
int err;
netdev_dbg(port->dev, "%s: port %u command %d cookie %lu\n",
__func__, port->chip_port, f->command, f->cookie);
if (!ingress) {
NL_SET_ERR_MSG_MOD(extack, "Only ingress is supported");
return -EOPNOTSUPP;
}
switch (f->command) {
case TC_CLSMATCHALL_REPLACE:
if (!flow_offload_has_one_action(&f->rule->action)) {
NL_SET_ERR_MSG_MOD(extack,
"Only one action is supported");
return -EOPNOTSUPP;
}
if (port->tc.block_shared) {
NL_SET_ERR_MSG_MOD(extack,
"Rate limit is not supported on shared blocks");
return -EOPNOTSUPP;
}
action = &f->rule->action.entries[0];
if (action->id != FLOW_ACTION_POLICE) {
NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
return -EOPNOTSUPP;
}
if (port->tc.police_id && port->tc.police_id != f->cookie) {
NL_SET_ERR_MSG_MOD(extack,
"Only one policer per port is supported\n");
return -EEXIST;
}
pol.rate = (u32)div_u64(action->police.rate_bytes_ps, 1000) * 8;
pol.burst = (u32)div_u64(action->police.rate_bytes_ps *
PSCHED_NS2TICKS(action->police.burst),
PSCHED_TICKS_PER_SEC);
err = ocelot_port_policer_add(port, &pol);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Could not add policer\n");
return err;
}
port->tc.police_id = f->cookie;
port->tc.offload_cnt++;
return 0;
case TC_CLSMATCHALL_DESTROY:
if (port->tc.police_id != f->cookie)
return -ENOENT;
err = ocelot_port_policer_del(port);
if (err) {
NL_SET_ERR_MSG_MOD(extack,
"Could not delete policer\n");
return err;
}
port->tc.police_id = 0;
port->tc.offload_cnt--;
return 0;
case TC_CLSMATCHALL_STATS: /* fall through */
default:
return -EOPNOTSUPP;
}
}
static int ocelot_setup_tc_block_cb(enum tc_setup_type type,
void *type_data,
void *cb_priv, bool ingress)
{
struct ocelot_port *port = cb_priv;
if (!tc_cls_can_offload_and_chain0(port->dev, type_data))
return -EOPNOTSUPP;
switch (type) {
case TC_SETUP_CLSMATCHALL:
netdev_dbg(port->dev, "tc_block_cb: TC_SETUP_CLSMATCHALL %s\n",
ingress ? "ingress" : "egress");
return ocelot_setup_tc_cls_matchall(port, type_data, ingress);
case TC_SETUP_CLSFLOWER:
return 0;
default:
netdev_dbg(port->dev, "tc_block_cb: type %d %s\n",
type,
ingress ? "ingress" : "egress");
return -EOPNOTSUPP;
}
}
static int ocelot_setup_tc_block_cb_ig(enum tc_setup_type type,
void *type_data,
void *cb_priv)
{
return ocelot_setup_tc_block_cb(type, type_data,
cb_priv, true);
}
static int ocelot_setup_tc_block_cb_eg(enum tc_setup_type type,
void *type_data,
void *cb_priv)
{
return ocelot_setup_tc_block_cb(type, type_data,
cb_priv, false);
}
static LIST_HEAD(ocelot_block_cb_list);
static int ocelot_setup_tc_block(struct ocelot_port *port,
struct flow_block_offload *f)
{
struct flow_block_cb *block_cb;
flow_setup_cb_t *cb;
int err;
netdev_dbg(port->dev, "tc_block command %d, binder_type %d\n",
f->command, f->binder_type);
if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) {
cb = ocelot_setup_tc_block_cb_ig;
port->tc.block_shared = f->block_shared;
} else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS) {
cb = ocelot_setup_tc_block_cb_eg;
} else {
return -EOPNOTSUPP;
}
f->driver_block_list = &ocelot_block_cb_list;
switch (f->command) {
case FLOW_BLOCK_BIND:
if (flow_block_cb_is_busy(cb, port, &ocelot_block_cb_list))
return -EBUSY;
block_cb = flow_block_cb_alloc(cb, port, port, NULL);
if (IS_ERR(block_cb))
return PTR_ERR(block_cb);
err = ocelot_setup_tc_block_flower_bind(port, f);
if (err < 0) {
flow_block_cb_free(block_cb);
return err;
}
flow_block_cb_add(block_cb, f);
list_add_tail(&block_cb->driver_list, f->driver_block_list);
return 0;
case FLOW_BLOCK_UNBIND:
block_cb = flow_block_cb_lookup(f->block, cb, port);
if (!block_cb)
return -ENOENT;
ocelot_setup_tc_block_flower_unbind(port, f);
flow_block_cb_remove(block_cb, f);
list_del(&block_cb->driver_list);
return 0;
default:
return -EOPNOTSUPP;
}
}
int ocelot_setup_tc(struct net_device *dev, enum tc_setup_type type,
void *type_data)
{
struct ocelot_port *port = netdev_priv(dev);
switch (type) {
case TC_SETUP_BLOCK:
return ocelot_setup_tc_block(port, type_data);
default:
return -EOPNOTSUPP;
}
return 0;
}
|