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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2019 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
#include <net/devlink.h>
#include <uapi/linux/devlink.h>
#include "core.h"
#include "reg.h"
#include "spectrum.h"
#define MLXSW_SP_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT
static void mlxsw_sp_rx_drop_listener(struct sk_buff *skb, u8 local_port,
void *priv);
static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port,
void *trap_ctx);
#define MLXSW_SP_TRAP_DROP(_id, _group_id) \
DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \
DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
MLXSW_SP_TRAP_METADATA)
#define MLXSW_SP_TRAP_EXCEPTION(_id, _group_id) \
DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \
DEVLINK_TRAP_GROUP_GENERIC(_group_id), \
MLXSW_SP_TRAP_METADATA)
#define MLXSW_SP_RXL_DISCARD(_id, _group_id) \
MLXSW_RXL(mlxsw_sp_rx_drop_listener, DISCARD_##_id, SET_FW_DEFAULT, \
false, SP_##_group_id, DISCARD)
#define MLXSW_SP_RXL_EXCEPTION(_id, _group_id, _action) \
MLXSW_RXL(mlxsw_sp_rx_exception_listener, _id, \
_action, false, SP_##_group_id, DISCARD)
static struct devlink_trap mlxsw_sp_traps_arr[] = {
MLXSW_SP_TRAP_DROP(SMAC_MC, L2_DROPS),
MLXSW_SP_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS),
MLXSW_SP_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS),
MLXSW_SP_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS),
MLXSW_SP_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS),
MLXSW_SP_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS),
MLXSW_SP_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS),
MLXSW_SP_TRAP_DROP(NON_IP_PACKET, L3_DROPS),
MLXSW_SP_TRAP_DROP(UC_DIP_MC_DMAC, L3_DROPS),
MLXSW_SP_TRAP_DROP(DIP_LB, L3_DROPS),
MLXSW_SP_TRAP_DROP(SIP_MC, L3_DROPS),
MLXSW_SP_TRAP_DROP(SIP_LB, L3_DROPS),
MLXSW_SP_TRAP_DROP(CORRUPTED_IP_HDR, L3_DROPS),
MLXSW_SP_TRAP_DROP(IPV4_SIP_BC, L3_DROPS),
MLXSW_SP_TRAP_DROP(IPV6_MC_DIP_RESERVED_SCOPE, L3_DROPS),
MLXSW_SP_TRAP_DROP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, L3_DROPS),
MLXSW_SP_TRAP_EXCEPTION(MTU_ERROR, L3_DROPS),
MLXSW_SP_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS),
MLXSW_SP_TRAP_EXCEPTION(RPF, L3_DROPS),
MLXSW_SP_TRAP_EXCEPTION(REJECT_ROUTE, L3_DROPS),
MLXSW_SP_TRAP_EXCEPTION(UNRESOLVED_NEIGH, L3_DROPS),
MLXSW_SP_TRAP_EXCEPTION(IPV4_LPM_UNICAST_MISS, L3_DROPS),
MLXSW_SP_TRAP_EXCEPTION(IPV6_LPM_UNICAST_MISS, L3_DROPS),
};
static struct mlxsw_listener mlxsw_sp_listeners_arr[] = {
MLXSW_SP_RXL_DISCARD(ING_PACKET_SMAC_MC, L2_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_SWITCH_VTAG_ALLOW, L2_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_SWITCH_VLAN, L2_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_SWITCH_STP, L2_DISCARDS),
MLXSW_SP_RXL_DISCARD(LOOKUP_SWITCH_UC, L2_DISCARDS),
MLXSW_SP_RXL_DISCARD(LOOKUP_SWITCH_MC_NULL, L2_DISCARDS),
MLXSW_SP_RXL_DISCARD(LOOKUP_SWITCH_LB, L2_DISCARDS),
MLXSW_SP_RXL_DISCARD(ROUTER2, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_ROUTER_NON_IP_PACKET, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_ROUTER_UC_DIP_MC_DMAC, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_ROUTER_DIP_LB, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_ROUTER_SIP_MC, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_ROUTER_SIP_LB, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_ROUTER_CORRUPTED_IP_HDR, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(ING_ROUTER_IPV4_SIP_BC, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(IPV6_MC_DIP_RESERVED_SCOPE, L3_DISCARDS),
MLXSW_SP_RXL_DISCARD(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, L3_DISCARDS),
MLXSW_SP_RXL_EXCEPTION(MTUERROR, ROUTER_EXP, TRAP_TO_CPU),
MLXSW_SP_RXL_EXCEPTION(TTLERROR, ROUTER_EXP, TRAP_TO_CPU),
MLXSW_SP_RXL_EXCEPTION(RPF, RPF, TRAP_TO_CPU),
MLXSW_SP_RXL_EXCEPTION(RTR_INGRESS1, REMOTE_ROUTE, TRAP_TO_CPU),
MLXSW_SP_RXL_EXCEPTION(HOST_MISS_IPV4, HOST_MISS, TRAP_TO_CPU),
MLXSW_SP_RXL_EXCEPTION(HOST_MISS_IPV6, HOST_MISS, TRAP_TO_CPU),
MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER3, REMOTE_ROUTE,
TRAP_EXCEPTION_TO_CPU),
MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM4, ROUTER_EXP,
TRAP_EXCEPTION_TO_CPU),
MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM6, ROUTER_EXP,
TRAP_EXCEPTION_TO_CPU),
};
/* Mapping between hardware trap and devlink trap. Multiple hardware traps can
* be mapped to the same devlink trap. Order is according to
* 'mlxsw_sp_listeners_arr'.
*/
static u16 mlxsw_sp_listener_devlink_map[] = {
DEVLINK_TRAP_GENERIC_ID_SMAC_MC,
DEVLINK_TRAP_GENERIC_ID_VLAN_TAG_MISMATCH,
DEVLINK_TRAP_GENERIC_ID_INGRESS_VLAN_FILTER,
DEVLINK_TRAP_GENERIC_ID_INGRESS_STP_FILTER,
DEVLINK_TRAP_GENERIC_ID_EMPTY_TX_LIST,
DEVLINK_TRAP_GENERIC_ID_EMPTY_TX_LIST,
DEVLINK_TRAP_GENERIC_ID_PORT_LOOPBACK_FILTER,
DEVLINK_TRAP_GENERIC_ID_BLACKHOLE_ROUTE,
DEVLINK_TRAP_GENERIC_ID_NON_IP_PACKET,
DEVLINK_TRAP_GENERIC_ID_UC_DIP_MC_DMAC,
DEVLINK_TRAP_GENERIC_ID_DIP_LB,
DEVLINK_TRAP_GENERIC_ID_SIP_MC,
DEVLINK_TRAP_GENERIC_ID_SIP_LB,
DEVLINK_TRAP_GENERIC_ID_CORRUPTED_IP_HDR,
DEVLINK_TRAP_GENERIC_ID_IPV4_SIP_BC,
DEVLINK_TRAP_GENERIC_ID_IPV6_MC_DIP_RESERVED_SCOPE,
DEVLINK_TRAP_GENERIC_ID_IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE,
DEVLINK_TRAP_GENERIC_ID_MTU_ERROR,
DEVLINK_TRAP_GENERIC_ID_TTL_ERROR,
DEVLINK_TRAP_GENERIC_ID_RPF,
DEVLINK_TRAP_GENERIC_ID_REJECT_ROUTE,
DEVLINK_TRAP_GENERIC_ID_UNRESOLVED_NEIGH,
DEVLINK_TRAP_GENERIC_ID_UNRESOLVED_NEIGH,
DEVLINK_TRAP_GENERIC_ID_UNRESOLVED_NEIGH,
DEVLINK_TRAP_GENERIC_ID_IPV4_LPM_UNICAST_MISS,
DEVLINK_TRAP_GENERIC_ID_IPV6_LPM_UNICAST_MISS,
};
static int mlxsw_sp_rx_listener(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
u8 local_port,
struct mlxsw_sp_port *mlxsw_sp_port)
{
struct mlxsw_sp_port_pcpu_stats *pcpu_stats;
if (unlikely(!mlxsw_sp_port)) {
dev_warn_ratelimited(mlxsw_sp->bus_info->dev, "Port %d: skb received for non-existent port\n",
local_port);
kfree_skb(skb);
return -EINVAL;
}
skb->dev = mlxsw_sp_port->dev;
pcpu_stats = this_cpu_ptr(mlxsw_sp_port->pcpu_stats);
u64_stats_update_begin(&pcpu_stats->syncp);
pcpu_stats->rx_packets++;
pcpu_stats->rx_bytes += skb->len;
u64_stats_update_end(&pcpu_stats->syncp);
skb->protocol = eth_type_trans(skb, skb->dev);
return 0;
}
static void mlxsw_sp_rx_drop_listener(struct sk_buff *skb, u8 local_port,
void *trap_ctx)
{
struct devlink_port *in_devlink_port;
struct mlxsw_sp_port *mlxsw_sp_port;
struct mlxsw_sp *mlxsw_sp;
struct devlink *devlink;
mlxsw_sp = devlink_trap_ctx_priv(trap_ctx);
mlxsw_sp_port = mlxsw_sp->ports[local_port];
if (mlxsw_sp_rx_listener(mlxsw_sp, skb, local_port, mlxsw_sp_port))
return;
devlink = priv_to_devlink(mlxsw_sp->core);
in_devlink_port = mlxsw_core_port_devlink_port_get(mlxsw_sp->core,
local_port);
skb_push(skb, ETH_HLEN);
devlink_trap_report(devlink, skb, trap_ctx, in_devlink_port);
consume_skb(skb);
}
static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port,
void *trap_ctx)
{
struct devlink_port *in_devlink_port;
struct mlxsw_sp_port *mlxsw_sp_port;
struct mlxsw_sp *mlxsw_sp;
struct devlink *devlink;
mlxsw_sp = devlink_trap_ctx_priv(trap_ctx);
mlxsw_sp_port = mlxsw_sp->ports[local_port];
if (mlxsw_sp_rx_listener(mlxsw_sp, skb, local_port, mlxsw_sp_port))
return;
devlink = priv_to_devlink(mlxsw_sp->core);
in_devlink_port = mlxsw_core_port_devlink_port_get(mlxsw_sp->core,
local_port);
skb_push(skb, ETH_HLEN);
devlink_trap_report(devlink, skb, trap_ctx, in_devlink_port);
skb_pull(skb, ETH_HLEN);
skb->offload_fwd_mark = 1;
netif_receive_skb(skb);
}
int mlxsw_sp_devlink_traps_init(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
if (WARN_ON(ARRAY_SIZE(mlxsw_sp_listener_devlink_map) !=
ARRAY_SIZE(mlxsw_sp_listeners_arr)))
return -EINVAL;
return devlink_traps_register(devlink, mlxsw_sp_traps_arr,
ARRAY_SIZE(mlxsw_sp_traps_arr),
mlxsw_sp);
}
void mlxsw_sp_devlink_traps_fini(struct mlxsw_sp *mlxsw_sp)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
devlink_traps_unregister(devlink, mlxsw_sp_traps_arr,
ARRAY_SIZE(mlxsw_sp_traps_arr));
}
int mlxsw_sp_trap_init(struct mlxsw_core *mlxsw_core,
const struct devlink_trap *trap, void *trap_ctx)
{
int i;
for (i = 0; i < ARRAY_SIZE(mlxsw_sp_listener_devlink_map); i++) {
struct mlxsw_listener *listener;
int err;
if (mlxsw_sp_listener_devlink_map[i] != trap->id)
continue;
listener = &mlxsw_sp_listeners_arr[i];
err = mlxsw_core_trap_register(mlxsw_core, listener, trap_ctx);
if (err)
return err;
}
return 0;
}
void mlxsw_sp_trap_fini(struct mlxsw_core *mlxsw_core,
const struct devlink_trap *trap, void *trap_ctx)
{
int i;
for (i = 0; i < ARRAY_SIZE(mlxsw_sp_listener_devlink_map); i++) {
struct mlxsw_listener *listener;
if (mlxsw_sp_listener_devlink_map[i] != trap->id)
continue;
listener = &mlxsw_sp_listeners_arr[i];
mlxsw_core_trap_unregister(mlxsw_core, listener, trap_ctx);
}
}
int mlxsw_sp_trap_action_set(struct mlxsw_core *mlxsw_core,
const struct devlink_trap *trap,
enum devlink_trap_action action)
{
int i;
for (i = 0; i < ARRAY_SIZE(mlxsw_sp_listener_devlink_map); i++) {
enum mlxsw_reg_hpkt_action hw_action;
struct mlxsw_listener *listener;
int err;
if (mlxsw_sp_listener_devlink_map[i] != trap->id)
continue;
listener = &mlxsw_sp_listeners_arr[i];
switch (action) {
case DEVLINK_TRAP_ACTION_DROP:
hw_action = MLXSW_REG_HPKT_ACTION_SET_FW_DEFAULT;
break;
case DEVLINK_TRAP_ACTION_TRAP:
hw_action = MLXSW_REG_HPKT_ACTION_TRAP_EXCEPTION_TO_CPU;
break;
default:
return -EINVAL;
}
err = mlxsw_core_trap_action_set(mlxsw_core, listener,
hw_action);
if (err)
return err;
}
return 0;
}
#define MLXSW_SP_DISCARD_POLICER_ID (MLXSW_REG_HTGT_TRAP_GROUP_MAX + 1)
static int
mlxsw_sp_trap_group_policer_init(struct mlxsw_sp *mlxsw_sp,
const struct devlink_trap_group *group)
{
enum mlxsw_reg_qpcr_ir_units ir_units;
char qpcr_pl[MLXSW_REG_QPCR_LEN];
u16 policer_id;
u8 burst_size;
bool is_bytes;
u32 rate;
switch (group->id) {
case DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS:/* fall through */
case DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS:
policer_id = MLXSW_SP_DISCARD_POLICER_ID;
ir_units = MLXSW_REG_QPCR_IR_UNITS_M;
is_bytes = false;
rate = 10 * 1024; /* 10Kpps */
burst_size = 7;
break;
default:
return -EINVAL;
}
mlxsw_reg_qpcr_pack(qpcr_pl, policer_id, ir_units, is_bytes, rate,
burst_size);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qpcr), qpcr_pl);
}
static int
__mlxsw_sp_trap_group_init(struct mlxsw_sp *mlxsw_sp,
const struct devlink_trap_group *group)
{
char htgt_pl[MLXSW_REG_HTGT_LEN];
u8 priority, tc, group_id;
u16 policer_id;
switch (group->id) {
case DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS:
group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L2_DISCARDS;
policer_id = MLXSW_SP_DISCARD_POLICER_ID;
priority = 0;
tc = 1;
break;
case DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS:
group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_DISCARDS;
policer_id = MLXSW_SP_DISCARD_POLICER_ID;
priority = 0;
tc = 1;
break;
default:
return -EINVAL;
}
mlxsw_reg_htgt_pack(htgt_pl, group_id, policer_id, priority, tc);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(htgt), htgt_pl);
}
int mlxsw_sp_trap_group_init(struct mlxsw_core *mlxsw_core,
const struct devlink_trap_group *group)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
int err;
err = mlxsw_sp_trap_group_policer_init(mlxsw_sp, group);
if (err)
return err;
err = __mlxsw_sp_trap_group_init(mlxsw_sp, group);
if (err)
return err;
return 0;
}
|
