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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / net / ethernet / netronome / nfp / flower / offload.c
blob46ffc2c2089301d21bf24f92b85fb807e146a436
1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
3
4 #include <linux/skbuff.h>
5 #include <net/devlink.h>
6 #include <net/pkt_cls.h>
7
8 #include "cmsg.h"
9 #include "main.h"
10 #include "conntrack.h"
11 #include "../nfpcore/nfp_cpp.h"
12 #include "../nfpcore/nfp_nsp.h"
13 #include "../nfp_app.h"
14 #include "../nfp_main.h"
15 #include "../nfp_net.h"
16 #include "../nfp_port.h"
17
18 #define NFP_FLOWER_SUPPORTED_TCPFLAGS \
19 (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST | \
20 TCPHDR_PSH | TCPHDR_URG)
21
22 #define NFP_FLOWER_SUPPORTED_CTLFLAGS \
23 (FLOW_DIS_IS_FRAGMENT | \
24 FLOW_DIS_FIRST_FRAG)
25
26 #define NFP_FLOWER_WHITELIST_DISSECTOR \
27 (BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) | \
28 BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) | \
29 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | \
30 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | \
31 BIT_ULL(FLOW_DISSECTOR_KEY_TCP) | \
32 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) | \
33 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) | \
34 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN) | \
35 BIT_ULL(FLOW_DISSECTOR_KEY_CVLAN) | \
36 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
37 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
38 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
39 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
40 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
41 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_OPTS) | \
42 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IP) | \
43 BIT_ULL(FLOW_DISSECTOR_KEY_MPLS) | \
44 BIT_ULL(FLOW_DISSECTOR_KEY_CT) | \
45 BIT_ULL(FLOW_DISSECTOR_KEY_META) | \
46 BIT_ULL(FLOW_DISSECTOR_KEY_IP))
47
48 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR \
49 (BIT_ULL(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
50 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
51 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
52 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
53 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_OPTS) | \
54 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
55 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IP))
56
57 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R \
58 (BIT_ULL(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
59 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS))
60
61 #define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_V6_R \
62 (BIT_ULL(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
63 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS))
64
65 #define NFP_FLOWER_MERGE_FIELDS \
66 (NFP_FLOWER_LAYER_PORT | \
67 NFP_FLOWER_LAYER_MAC | \
68 NFP_FLOWER_LAYER_TP | \
69 NFP_FLOWER_LAYER_IPV4 | \
70 NFP_FLOWER_LAYER_IPV6)
71
72 #define NFP_FLOWER_PRE_TUN_RULE_FIELDS \
73 (NFP_FLOWER_LAYER_EXT_META | \
74 NFP_FLOWER_LAYER_PORT | \
75 NFP_FLOWER_LAYER_MAC | \
76 NFP_FLOWER_LAYER_IPV4 | \
77 NFP_FLOWER_LAYER_IPV6)
78
79 struct nfp_flower_merge_check {
80 union {
81 struct {
82 __be16 tci;
83 struct nfp_flower_mac_mpls l2;
84 struct nfp_flower_tp_ports l4;
85 union {
86 struct nfp_flower_ipv4 ipv4;
87 struct nfp_flower_ipv6 ipv6;
88 };
89 };
90 unsigned long vals[8];
91 };
92 };
93
94 int
95 nfp_flower_xmit_flow(struct nfp_app *app, struct nfp_fl_payload *nfp_flow,
96 u8 mtype)
97 {
98 u32 meta_len, key_len, mask_len, act_len, tot_len;
99 struct sk_buff *skb;
100 unsigned char *msg;
101
102 meta_len = sizeof(struct nfp_fl_rule_metadata);
103 key_len = nfp_flow->meta.key_len;
104 mask_len = nfp_flow->meta.mask_len;
105 act_len = nfp_flow->meta.act_len;
106
107 tot_len = meta_len + key_len + mask_len + act_len;
108
109 /* Convert to long words as firmware expects
110 * lengths in units of NFP_FL_LW_SIZ.
111 */
112 nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ;
113 nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ;
114 nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ;
115
116 skb = nfp_flower_cmsg_alloc(app, tot_len, mtype, GFP_KERNEL);
117 if (!skb)
118 return -ENOMEM;
119
120 msg = nfp_flower_cmsg_get_data(skb);
121 memcpy(msg, &nfp_flow->meta, meta_len);
122 memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len);
123 memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len);
124 memcpy(&msg[meta_len + key_len + mask_len],
125 nfp_flow->action_data, act_len);
126
127 /* Convert back to bytes as software expects
128 * lengths in units of bytes.
129 */
130 nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ;
131 nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ;
132 nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ;
133
134 nfp_ctrl_tx(app->ctrl, skb);
135
136 return 0;
137 }
138
139 static bool nfp_flower_check_higher_than_mac(struct flow_rule *rule)
140 {
141 return flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS) ||
142 flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS) ||
143 flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS) ||
144 flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP);
145 }
146
147 static bool nfp_flower_check_higher_than_l3(struct flow_rule *rule)
148 {
149 return flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS) ||
150 flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP);
151 }
152
153 static int
154 nfp_flower_calc_opt_layer(struct flow_dissector_key_enc_opts *enc_opts,
155 u32 *key_layer_two, int *key_size, bool ipv6,
156 struct netlink_ext_ack *extack)
157 {
158 if (enc_opts->len > NFP_FL_MAX_GENEVE_OPT_KEY ||
159 (ipv6 && enc_opts->len > NFP_FL_MAX_GENEVE_OPT_KEY_V6)) {
160 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: geneve options exceed maximum length");
161 return -EOPNOTSUPP;
162 }
163
164 if (enc_opts->len > 0) {
165 *key_layer_two |= NFP_FLOWER_LAYER2_GENEVE_OP;
166 *key_size += sizeof(struct nfp_flower_geneve_options);
167 }
168
169 return 0;
170 }
171
172 static int
173 nfp_flower_calc_udp_tun_layer(struct flow_dissector_key_ports *enc_ports,
174 struct flow_dissector_key_enc_opts *enc_op,
175 u32 *key_layer_two, u8 *key_layer, int *key_size,
176 struct nfp_flower_priv *priv,
177 enum nfp_flower_tun_type *tun_type, bool ipv6,
178 struct netlink_ext_ack *extack)
179 {
180 int err;
181
182 switch (enc_ports->dst) {
183 case htons(IANA_VXLAN_UDP_PORT):
184 *tun_type = NFP_FL_TUNNEL_VXLAN;
185 *key_layer |= NFP_FLOWER_LAYER_VXLAN;
186
187 if (ipv6) {
188 *key_layer |= NFP_FLOWER_LAYER_EXT_META;
189 *key_size += sizeof(struct nfp_flower_ext_meta);
190 *key_layer_two |= NFP_FLOWER_LAYER2_TUN_IPV6;
191 *key_size += sizeof(struct nfp_flower_ipv6_udp_tun);
192 } else {
193 *key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
194 }
195
196 if (enc_op) {
197 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: encap options not supported on vxlan tunnels");
198 return -EOPNOTSUPP;
199 }
200 break;
201 case htons(GENEVE_UDP_PORT):
202 if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)) {
203 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve offload");
204 return -EOPNOTSUPP;
205 }
206 *tun_type = NFP_FL_TUNNEL_GENEVE;
207 *key_layer |= NFP_FLOWER_LAYER_EXT_META;
208 *key_size += sizeof(struct nfp_flower_ext_meta);
209 *key_layer_two |= NFP_FLOWER_LAYER2_GENEVE;
210
211 if (ipv6) {
212 *key_layer_two |= NFP_FLOWER_LAYER2_TUN_IPV6;
213 *key_size += sizeof(struct nfp_flower_ipv6_udp_tun);
214 } else {
215 *key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
216 }
217
218 if (!enc_op)
219 break;
220 if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT)) {
221 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support geneve option offload");
222 return -EOPNOTSUPP;
223 }
224 err = nfp_flower_calc_opt_layer(enc_op, key_layer_two, key_size,
225 ipv6, extack);
226 if (err)
227 return err;
228 break;
229 default:
230 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: tunnel type unknown");
231 return -EOPNOTSUPP;
232 }
233
234 return 0;
235 }
236
237 int
238 nfp_flower_calculate_key_layers(struct nfp_app *app,
239 struct net_device *netdev,
240 struct nfp_fl_key_ls *ret_key_ls,
241 struct flow_rule *rule,
242 enum nfp_flower_tun_type *tun_type,
243 struct netlink_ext_ack *extack)
244 {
245 struct flow_dissector *dissector = rule->match.dissector;
246 struct flow_match_basic basic = { NULL, NULL};
247 struct nfp_flower_priv *priv = app->priv;
248 u32 key_layer_two;
249 u8 key_layer;
250 int key_size;
251 int err;
252
253 if (dissector->used_keys & ~NFP_FLOWER_WHITELIST_DISSECTOR) {
254 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match not supported");
255 return -EOPNOTSUPP;
256 }
257
258 /* If any tun dissector is used then the required set must be used. */
259 if (dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR &&
260 (dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_V6_R)
261 != NFP_FLOWER_WHITELIST_TUN_DISSECTOR_V6_R &&
262 (dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
263 != NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R) {
264 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: tunnel match not supported");
265 return -EOPNOTSUPP;
266 }
267
268 key_layer_two = 0;
269 key_layer = NFP_FLOWER_LAYER_PORT;
270 key_size = sizeof(struct nfp_flower_meta_tci) +
271 sizeof(struct nfp_flower_in_port);
272
273 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS) ||
274 flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_MPLS)) {
275 key_layer |= NFP_FLOWER_LAYER_MAC;
276 key_size += sizeof(struct nfp_flower_mac_mpls);
277 }
278
279 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
280 struct flow_match_vlan vlan;
281
282 flow_rule_match_vlan(rule, &vlan);
283 if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_PCP) &&
284 vlan.key->vlan_priority) {
285 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support VLAN PCP offload");
286 return -EOPNOTSUPP;
287 }
288 if (priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ &&
289 !(key_layer_two & NFP_FLOWER_LAYER2_QINQ)) {
290 key_layer |= NFP_FLOWER_LAYER_EXT_META;
291 key_size += sizeof(struct nfp_flower_ext_meta);
292 key_size += sizeof(struct nfp_flower_vlan);
293 key_layer_two |= NFP_FLOWER_LAYER2_QINQ;
294 }
295 }
296
297 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN)) {
298 struct flow_match_vlan cvlan;
299
300 if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ)) {
301 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: loaded firmware does not support VLAN QinQ offload");
302 return -EOPNOTSUPP;
303 }
304
305 flow_rule_match_vlan(rule, &cvlan);
306 if (!(key_layer_two & NFP_FLOWER_LAYER2_QINQ)) {
307 key_layer |= NFP_FLOWER_LAYER_EXT_META;
308 key_size += sizeof(struct nfp_flower_ext_meta);
309 key_size += sizeof(struct nfp_flower_vlan);
310 key_layer_two |= NFP_FLOWER_LAYER2_QINQ;
311 }
312 }
313
314 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
315 struct flow_match_enc_opts enc_op = { NULL, NULL };
316 struct flow_match_ipv4_addrs ipv4_addrs;
317 struct flow_match_ipv6_addrs ipv6_addrs;
318 struct flow_match_control enc_ctl;
319 struct flow_match_ports enc_ports;
320 bool ipv6_tun = false;
321
322 flow_rule_match_enc_control(rule, &enc_ctl);
323
324 if (flow_rule_has_enc_control_flags(enc_ctl.mask->flags,
325 extack))
326 return -EOPNOTSUPP;
327
328 if (enc_ctl.mask->addr_type != 0xffff) {
329 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: wildcarded protocols on tunnels are not supported");
330 return -EOPNOTSUPP;
331 }
332
333 ipv6_tun = enc_ctl.key->addr_type ==
334 FLOW_DISSECTOR_KEY_IPV6_ADDRS;
335 if (ipv6_tun &&
336 !(priv->flower_ext_feats & NFP_FL_FEATS_IPV6_TUN)) {
337 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: firmware does not support IPv6 tunnels");
338 return -EOPNOTSUPP;
339 }
340
341 if (!ipv6_tun &&
342 enc_ctl.key->addr_type != FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
343 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: tunnel address type not IPv4 or IPv6");
344 return -EOPNOTSUPP;
345 }
346
347 if (ipv6_tun) {
348 flow_rule_match_enc_ipv6_addrs(rule, &ipv6_addrs);
349 if (memchr_inv(&ipv6_addrs.mask->dst, 0xff,
350 sizeof(ipv6_addrs.mask->dst))) {
351 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: only an exact match IPv6 destination address is supported");
352 return -EOPNOTSUPP;
353 }
354 } else {
355 flow_rule_match_enc_ipv4_addrs(rule, &ipv4_addrs);
356 if (ipv4_addrs.mask->dst != cpu_to_be32(~0)) {
357 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: only an exact match IPv4 destination address is supported");
358 return -EOPNOTSUPP;
359 }
360 }
361
362 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_OPTS))
363 flow_rule_match_enc_opts(rule, &enc_op);
364
365 if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
366 /* Check if GRE, which has no enc_ports */
367 if (!netif_is_gretap(netdev) && !netif_is_ip6gretap(netdev)) {
368 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: an exact match on L4 destination port is required for non-GRE tunnels");
369 return -EOPNOTSUPP;
370 }
371
372 *tun_type = NFP_FL_TUNNEL_GRE;
373 key_layer |= NFP_FLOWER_LAYER_EXT_META;
374 key_size += sizeof(struct nfp_flower_ext_meta);
375 key_layer_two |= NFP_FLOWER_LAYER2_GRE;
376
377 if (ipv6_tun) {
378 key_layer_two |= NFP_FLOWER_LAYER2_TUN_IPV6;
379 key_size +=
380 sizeof(struct nfp_flower_ipv6_gre_tun);
381 } else {
382 key_size +=
383 sizeof(struct nfp_flower_ipv4_gre_tun);
384 }
385
386 if (enc_op.key) {
387 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: encap options not supported on GRE tunnels");
388 return -EOPNOTSUPP;
389 }
390 } else {
391 flow_rule_match_enc_ports(rule, &enc_ports);
392 if (enc_ports.mask->dst != cpu_to_be16(~0)) {
393 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: only an exact match L4 destination port is supported");
394 return -EOPNOTSUPP;
395 }
396
397 err = nfp_flower_calc_udp_tun_layer(enc_ports.key,
398 enc_op.key,
399 &key_layer_two,
400 &key_layer,
401 &key_size, priv,
402 tun_type, ipv6_tun,
403 extack);
404 if (err)
405 return err;
406
407 /* Ensure the ingress netdev matches the expected
408 * tun type.
409 */
410 if (!nfp_fl_netdev_is_tunnel_type(netdev, *tun_type)) {
411 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: ingress netdev does not match the expected tunnel type");
412 return -EOPNOTSUPP;
413 }
414 }
415 }
416
417 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC))
418 flow_rule_match_basic(rule, &basic);
419
420 if (basic.mask && basic.mask->n_proto) {
421 /* Ethernet type is present in the key. */
422 switch (basic.key->n_proto) {
423 case cpu_to_be16(ETH_P_IP):
424 key_layer |= NFP_FLOWER_LAYER_IPV4;
425 key_size += sizeof(struct nfp_flower_ipv4);
426 break;
427
428 case cpu_to_be16(ETH_P_IPV6):
429 key_layer |= NFP_FLOWER_LAYER_IPV6;
430 key_size += sizeof(struct nfp_flower_ipv6);
431 break;
432
433 /* Currently we do not offload ARP
434 * because we rely on it to get to the host.
435 */
436 case cpu_to_be16(ETH_P_ARP):
437 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: ARP not supported");
438 return -EOPNOTSUPP;
439
440 case cpu_to_be16(ETH_P_MPLS_UC):
441 case cpu_to_be16(ETH_P_MPLS_MC):
442 if (!(key_layer & NFP_FLOWER_LAYER_MAC)) {
443 key_layer |= NFP_FLOWER_LAYER_MAC;
444 key_size += sizeof(struct nfp_flower_mac_mpls);
445 }
446 break;
447
448 /* Will be included in layer 2. */
449 case cpu_to_be16(ETH_P_8021Q):
450 break;
451
452 default:
453 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match on given EtherType is not supported");
454 return -EOPNOTSUPP;
455 }
456 } else if (nfp_flower_check_higher_than_mac(rule)) {
457 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot match above L2 without specified EtherType");
458 return -EOPNOTSUPP;
459 }
460
461 if (basic.mask && basic.mask->ip_proto) {
462 switch (basic.key->ip_proto) {
463 case IPPROTO_TCP:
464 case IPPROTO_UDP:
465 case IPPROTO_SCTP:
466 case IPPROTO_ICMP:
467 case IPPROTO_ICMPV6:
468 key_layer |= NFP_FLOWER_LAYER_TP;
469 key_size += sizeof(struct nfp_flower_tp_ports);
470 break;
471 }
472 }
473
474 if (!(key_layer & NFP_FLOWER_LAYER_TP) &&
475 nfp_flower_check_higher_than_l3(rule)) {
476 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: cannot match on L4 information without specified IP protocol type");
477 return -EOPNOTSUPP;
478 }
479
480 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_TCP)) {
481 struct flow_match_tcp tcp;
482 u32 tcp_flags;
483
484 flow_rule_match_tcp(rule, &tcp);
485 tcp_flags = be16_to_cpu(tcp.key->flags);
486
487 if (tcp_flags & ~NFP_FLOWER_SUPPORTED_TCPFLAGS) {
488 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: no match support for selected TCP flags");
489 return -EOPNOTSUPP;
490 }
491
492 /* We only support PSH and URG flags when either
493 * FIN, SYN or RST is present as well.
494 */
495 if ((tcp_flags & (TCPHDR_PSH | TCPHDR_URG)) &&
496 !(tcp_flags & (TCPHDR_FIN | TCPHDR_SYN | TCPHDR_RST))) {
497 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: PSH and URG is only supported when used with FIN, SYN or RST");
498 return -EOPNOTSUPP;
499 }
500
501 /* We need to store TCP flags in the either the IPv4 or IPv6 key
502 * space, thus we need to ensure we include a IPv4/IPv6 key
503 * layer if we have not done so already.
504 */
505 if (!basic.key) {
506 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match on TCP flags requires a match on L3 protocol");
507 return -EOPNOTSUPP;
508 }
509
510 if (!(key_layer & NFP_FLOWER_LAYER_IPV4) &&
511 !(key_layer & NFP_FLOWER_LAYER_IPV6)) {
512 switch (basic.key->n_proto) {
513 case cpu_to_be16(ETH_P_IP):
514 key_layer |= NFP_FLOWER_LAYER_IPV4;
515 key_size += sizeof(struct nfp_flower_ipv4);
516 break;
517
518 case cpu_to_be16(ETH_P_IPV6):
519 key_layer |= NFP_FLOWER_LAYER_IPV6;
520 key_size += sizeof(struct nfp_flower_ipv6);
521 break;
522
523 default:
524 NL_SET_ERR_MSG_MOD(extack, "unsupported offload: match on TCP flags requires a match on IPv4/IPv6");
525 return -EOPNOTSUPP;
526 }
527 }
528 }
529
530 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
531 struct flow_match_control ctl;
532
533 flow_rule_match_control(rule, &ctl);
534
535 if (!flow_rule_is_supp_control_flags(NFP_FLOWER_SUPPORTED_CTLFLAGS,
536 ctl.mask->flags, extack))
537 return -EOPNOTSUPP;
538 }
539
540 ret_key_ls->key_layer = key_layer;
541 ret_key_ls->key_layer_two = key_layer_two;
542 ret_key_ls->key_size = key_size;
543
544 return 0;
545 }
546
547 struct nfp_fl_payload *
548 nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer)
549 {
550 struct nfp_fl_payload *flow_pay;
551
552 flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL);
553 if (!flow_pay)
554 return NULL;
555
556 flow_pay->meta.key_len = key_layer->key_size;
557 flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL);
558 if (!flow_pay->unmasked_data)
559 goto err_free_flow;
560
561 flow_pay->meta.mask_len = key_layer->key_size;
562 flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL);
563 if (!flow_pay->mask_data)
564 goto err_free_unmasked;
565
566 flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL);
567 if (!flow_pay->action_data)
568 goto err_free_mask;
569
570 flow_pay->nfp_tun_ipv4_addr = 0;
571 flow_pay->nfp_tun_ipv6 = NULL;
572 flow_pay->meta.flags = 0;
573 INIT_LIST_HEAD(&flow_pay->linked_flows);
574 flow_pay->in_hw = false;
575 flow_pay->pre_tun_rule.dev = NULL;
576
577 return flow_pay;
578
579 err_free_mask:
580 kfree(flow_pay->mask_data);
581 err_free_unmasked:
582 kfree(flow_pay->unmasked_data);
583 err_free_flow:
584 kfree(flow_pay);
585 return NULL;
586 }
587
588 static int
589 nfp_flower_update_merge_with_actions(struct nfp_fl_payload *flow,
590 struct nfp_flower_merge_check *merge,
591 u8 *last_act_id, int *act_out)
592 {
593 struct nfp_fl_set_ipv6_tc_hl_fl *ipv6_tc_hl_fl;
594 struct nfp_fl_set_ip4_ttl_tos *ipv4_ttl_tos;
595 struct nfp_fl_set_ip4_addrs *ipv4_add;
596 struct nfp_fl_set_ipv6_addr *ipv6_add;
597 struct nfp_fl_push_vlan *push_vlan;
598 struct nfp_fl_pre_tunnel *pre_tun;
599 struct nfp_fl_set_tport *tport;
600 struct nfp_fl_set_eth *eth;
601 struct nfp_fl_act_head *a;
602 unsigned int act_off = 0;
603 bool ipv6_tun = false;
604 u8 act_id = 0;
605 u8 *ports;
606 int i;
607
608 while (act_off < flow->meta.act_len) {
609 a = (struct nfp_fl_act_head *)&flow->action_data[act_off];
610 act_id = a->jump_id;
611
612 switch (act_id) {
613 case NFP_FL_ACTION_OPCODE_OUTPUT:
614 if (act_out)
615 (*act_out)++;
616 break;
617 case NFP_FL_ACTION_OPCODE_PUSH_VLAN:
618 push_vlan = (struct nfp_fl_push_vlan *)a;
619 if (push_vlan->vlan_tci)
620 merge->tci = cpu_to_be16(0xffff);
621 break;
622 case NFP_FL_ACTION_OPCODE_POP_VLAN:
623 merge->tci = cpu_to_be16(0);
624 break;
625 case NFP_FL_ACTION_OPCODE_SET_TUNNEL:
626 /* New tunnel header means l2 to l4 can be matched. */
627 eth_broadcast_addr(&merge->l2.mac_dst[0]);
628 eth_broadcast_addr(&merge->l2.mac_src[0]);
629 memset(&merge->l4, 0xff,
630 sizeof(struct nfp_flower_tp_ports));
631 if (ipv6_tun)
632 memset(&merge->ipv6, 0xff,
633 sizeof(struct nfp_flower_ipv6));
634 else
635 memset(&merge->ipv4, 0xff,
636 sizeof(struct nfp_flower_ipv4));
637 break;
638 case NFP_FL_ACTION_OPCODE_SET_ETHERNET:
639 eth = (struct nfp_fl_set_eth *)a;
640 for (i = 0; i < ETH_ALEN; i++)
641 merge->l2.mac_dst[i] |= eth->eth_addr_mask[i];
642 for (i = 0; i < ETH_ALEN; i++)
643 merge->l2.mac_src[i] |=
644 eth->eth_addr_mask[ETH_ALEN + i];
645 break;
646 case NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS:
647 ipv4_add = (struct nfp_fl_set_ip4_addrs *)a;
648 merge->ipv4.ipv4_src |= ipv4_add->ipv4_src_mask;
649 merge->ipv4.ipv4_dst |= ipv4_add->ipv4_dst_mask;
650 break;
651 case NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS:
652 ipv4_ttl_tos = (struct nfp_fl_set_ip4_ttl_tos *)a;
653 merge->ipv4.ip_ext.ttl |= ipv4_ttl_tos->ipv4_ttl_mask;
654 merge->ipv4.ip_ext.tos |= ipv4_ttl_tos->ipv4_tos_mask;
655 break;
656 case NFP_FL_ACTION_OPCODE_SET_IPV6_SRC:
657 ipv6_add = (struct nfp_fl_set_ipv6_addr *)a;
658 for (i = 0; i < 4; i++)
659 merge->ipv6.ipv6_src.in6_u.u6_addr32[i] |=
660 ipv6_add->ipv6[i].mask;
661 break;
662 case NFP_FL_ACTION_OPCODE_SET_IPV6_DST:
663 ipv6_add = (struct nfp_fl_set_ipv6_addr *)a;
664 for (i = 0; i < 4; i++)
665 merge->ipv6.ipv6_dst.in6_u.u6_addr32[i] |=
666 ipv6_add->ipv6[i].mask;
667 break;
668 case NFP_FL_ACTION_OPCODE_SET_IPV6_TC_HL_FL:
669 ipv6_tc_hl_fl = (struct nfp_fl_set_ipv6_tc_hl_fl *)a;
670 merge->ipv6.ip_ext.ttl |=
671 ipv6_tc_hl_fl->ipv6_hop_limit_mask;
672 merge->ipv6.ip_ext.tos |= ipv6_tc_hl_fl->ipv6_tc_mask;
673 merge->ipv6.ipv6_flow_label_exthdr |=
674 ipv6_tc_hl_fl->ipv6_label_mask;
675 break;
676 case NFP_FL_ACTION_OPCODE_SET_UDP:
677 case NFP_FL_ACTION_OPCODE_SET_TCP:
678 tport = (struct nfp_fl_set_tport *)a;
679 ports = (u8 *)&merge->l4.port_src;
680 for (i = 0; i < 4; i++)
681 ports[i] |= tport->tp_port_mask[i];
682 break;
683 case NFP_FL_ACTION_OPCODE_PRE_TUNNEL:
684 pre_tun = (struct nfp_fl_pre_tunnel *)a;
685 ipv6_tun = be16_to_cpu(pre_tun->flags) &
686 NFP_FL_PRE_TUN_IPV6;
687 break;
688 case NFP_FL_ACTION_OPCODE_PRE_LAG:
689 case NFP_FL_ACTION_OPCODE_PUSH_GENEVE:
690 break;
691 default:
692 return -EOPNOTSUPP;
693 }
694
695 act_off += a->len_lw << NFP_FL_LW_SIZ;
696 }
697
698 if (last_act_id)
699 *last_act_id = act_id;
700
701 return 0;
702 }
703
704 static int
705 nfp_flower_populate_merge_match(struct nfp_fl_payload *flow,
706 struct nfp_flower_merge_check *merge,
707 bool extra_fields)
708 {
709 struct nfp_flower_meta_tci *meta_tci;
710 u8 *mask = flow->mask_data;
711 u8 key_layer, match_size;
712
713 memset(merge, 0, sizeof(struct nfp_flower_merge_check));
714
715 meta_tci = (struct nfp_flower_meta_tci *)mask;
716 key_layer = meta_tci->nfp_flow_key_layer;
717
718 if (key_layer & ~NFP_FLOWER_MERGE_FIELDS && !extra_fields)
719 return -EOPNOTSUPP;
720
721 merge->tci = meta_tci->tci;
722 mask += sizeof(struct nfp_flower_meta_tci);
723
724 if (key_layer & NFP_FLOWER_LAYER_EXT_META)
725 mask += sizeof(struct nfp_flower_ext_meta);
726
727 mask += sizeof(struct nfp_flower_in_port);
728
729 if (key_layer & NFP_FLOWER_LAYER_MAC) {
730 match_size = sizeof(struct nfp_flower_mac_mpls);
731 memcpy(&merge->l2, mask, match_size);
732 mask += match_size;
733 }
734
735 if (key_layer & NFP_FLOWER_LAYER_TP) {
736 match_size = sizeof(struct nfp_flower_tp_ports);
737 memcpy(&merge->l4, mask, match_size);
738 mask += match_size;
739 }
740
741 if (key_layer & NFP_FLOWER_LAYER_IPV4) {
742 match_size = sizeof(struct nfp_flower_ipv4);
743 memcpy(&merge->ipv4, mask, match_size);
744 }
745
746 if (key_layer & NFP_FLOWER_LAYER_IPV6) {
747 match_size = sizeof(struct nfp_flower_ipv6);
748 memcpy(&merge->ipv6, mask, match_size);
749 }
750
751 return 0;
752 }
753
754 static int
755 nfp_flower_can_merge(struct nfp_fl_payload *sub_flow1,
756 struct nfp_fl_payload *sub_flow2)
757 {
758 /* Two flows can be merged if sub_flow2 only matches on bits that are
759 * either matched by sub_flow1 or set by a sub_flow1 action. This
760 * ensures that every packet that hits sub_flow1 and recirculates is
761 * guaranteed to hit sub_flow2.
762 */
763 struct nfp_flower_merge_check sub_flow1_merge, sub_flow2_merge;
764 int err, act_out = 0;
765 u8 last_act_id = 0;
766
767 err = nfp_flower_populate_merge_match(sub_flow1, &sub_flow1_merge,
768 true);
769 if (err)
770 return err;
771
772 err = nfp_flower_populate_merge_match(sub_flow2, &sub_flow2_merge,
773 false);
774 if (err)
775 return err;
776
777 err = nfp_flower_update_merge_with_actions(sub_flow1, &sub_flow1_merge,
778 &last_act_id, &act_out);
779 if (err)
780 return err;
781
782 /* Must only be 1 output action and it must be the last in sequence. */
783 if (act_out != 1 || last_act_id != NFP_FL_ACTION_OPCODE_OUTPUT)
784 return -EOPNOTSUPP;
785
786 /* Reject merge if sub_flow2 matches on something that is not matched
787 * on or set in an action by sub_flow1.
788 */
789 err = bitmap_andnot(sub_flow2_merge.vals, sub_flow2_merge.vals,
790 sub_flow1_merge.vals,
791 sizeof(struct nfp_flower_merge_check) * 8);
792 if (err)
793 return -EINVAL;
794
795 return 0;
796 }
797
798 static unsigned int
799 nfp_flower_copy_pre_actions(char *act_dst, char *act_src, int len,
800 bool *tunnel_act)
801 {
802 unsigned int act_off = 0, act_len;
803 struct nfp_fl_act_head *a;
804 u8 act_id = 0;
805
806 while (act_off < len) {
807 a = (struct nfp_fl_act_head *)&act_src[act_off];
808 act_len = a->len_lw << NFP_FL_LW_SIZ;
809 act_id = a->jump_id;
810
811 switch (act_id) {
812 case NFP_FL_ACTION_OPCODE_PRE_TUNNEL:
813 if (tunnel_act)
814 *tunnel_act = true;
815 fallthrough;
816 case NFP_FL_ACTION_OPCODE_PRE_LAG:
817 memcpy(act_dst + act_off, act_src + act_off, act_len);
818 break;
819 default:
820 return act_off;
821 }
822
823 act_off += act_len;
824 }
825
826 return act_off;
827 }
828
829 static int
830 nfp_fl_verify_post_tun_acts(char *acts, int len, struct nfp_fl_push_vlan **vlan)
831 {
832 struct nfp_fl_act_head *a;
833 unsigned int act_off = 0;
834
835 while (act_off < len) {
836 a = (struct nfp_fl_act_head *)&acts[act_off];
837
838 if (a->jump_id == NFP_FL_ACTION_OPCODE_PUSH_VLAN && !act_off)
839 *vlan = (struct nfp_fl_push_vlan *)a;
840 else if (a->jump_id != NFP_FL_ACTION_OPCODE_OUTPUT)
841 return -EOPNOTSUPP;
842
843 act_off += a->len_lw << NFP_FL_LW_SIZ;
844 }
845
846 /* Ensure any VLAN push also has an egress action. */
847 if (*vlan && act_off <= sizeof(struct nfp_fl_push_vlan))
848 return -EOPNOTSUPP;
849
850 return 0;
851 }
852
853 static int
854 nfp_fl_push_vlan_after_tun(char *acts, int len, struct nfp_fl_push_vlan *vlan)
855 {
856 struct nfp_fl_set_tun *tun;
857 struct nfp_fl_act_head *a;
858 unsigned int act_off = 0;
859
860 while (act_off < len) {
861 a = (struct nfp_fl_act_head *)&acts[act_off];
862
863 if (a->jump_id == NFP_FL_ACTION_OPCODE_SET_TUNNEL) {
864 tun = (struct nfp_fl_set_tun *)a;
865 tun->outer_vlan_tpid = vlan->vlan_tpid;
866 tun->outer_vlan_tci = vlan->vlan_tci;
867
868 return 0;
869 }
870
871 act_off += a->len_lw << NFP_FL_LW_SIZ;
872 }
873
874 /* Return error if no tunnel action is found. */
875 return -EOPNOTSUPP;
876 }
877
878 static int
879 nfp_flower_merge_action(struct nfp_fl_payload *sub_flow1,
880 struct nfp_fl_payload *sub_flow2,
881 struct nfp_fl_payload *merge_flow)
882 {
883 unsigned int sub1_act_len, sub2_act_len, pre_off1, pre_off2;
884 struct nfp_fl_push_vlan *post_tun_push_vlan = NULL;
885 bool tunnel_act = false;
886 char *merge_act;
887 int err;
888
889 /* The last action of sub_flow1 must be output - do not merge this. */
890 sub1_act_len = sub_flow1->meta.act_len - sizeof(struct nfp_fl_output);
891 sub2_act_len = sub_flow2->meta.act_len;
892
893 if (!sub2_act_len)
894 return -EINVAL;
895
896 if (sub1_act_len + sub2_act_len > NFP_FL_MAX_A_SIZ)
897 return -EINVAL;
898
899 /* A shortcut can only be applied if there is a single action. */
900 if (sub1_act_len)
901 merge_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
902 else
903 merge_flow->meta.shortcut = sub_flow2->meta.shortcut;
904
905 merge_flow->meta.act_len = sub1_act_len + sub2_act_len;
906 merge_act = merge_flow->action_data;
907
908 /* Copy any pre-actions to the start of merge flow action list. */
909 pre_off1 = nfp_flower_copy_pre_actions(merge_act,
910 sub_flow1->action_data,
911 sub1_act_len, &tunnel_act);
912 merge_act += pre_off1;
913 sub1_act_len -= pre_off1;
914 pre_off2 = nfp_flower_copy_pre_actions(merge_act,
915 sub_flow2->action_data,
916 sub2_act_len, NULL);
917 merge_act += pre_off2;
918 sub2_act_len -= pre_off2;
919
920 /* FW does a tunnel push when egressing, therefore, if sub_flow 1 pushes
921 * a tunnel, there are restrictions on what sub_flow 2 actions lead to a
922 * valid merge.
923 */
924 if (tunnel_act) {
925 char *post_tun_acts = &sub_flow2->action_data[pre_off2];
926
927 err = nfp_fl_verify_post_tun_acts(post_tun_acts, sub2_act_len,
928 &post_tun_push_vlan);
929 if (err)
930 return err;
931
932 if (post_tun_push_vlan) {
933 pre_off2 += sizeof(*post_tun_push_vlan);
934 sub2_act_len -= sizeof(*post_tun_push_vlan);
935 }
936 }
937
938 /* Copy remaining actions from sub_flows 1 and 2. */
939 memcpy(merge_act, sub_flow1->action_data + pre_off1, sub1_act_len);
940
941 if (post_tun_push_vlan) {
942 /* Update tunnel action in merge to include VLAN push. */
943 err = nfp_fl_push_vlan_after_tun(merge_act, sub1_act_len,
944 post_tun_push_vlan);
945 if (err)
946 return err;
947
948 merge_flow->meta.act_len -= sizeof(*post_tun_push_vlan);
949 }
950
951 merge_act += sub1_act_len;
952 memcpy(merge_act, sub_flow2->action_data + pre_off2, sub2_act_len);
953
954 return 0;
955 }
956
957 /* Flow link code should only be accessed under RTNL. */
958 static void nfp_flower_unlink_flow(struct nfp_fl_payload_link *link)
959 {
960 list_del(&link->merge_flow.list);
961 list_del(&link->sub_flow.list);
962 kfree(link);
963 }
964
965 static void nfp_flower_unlink_flows(struct nfp_fl_payload *merge_flow,
966 struct nfp_fl_payload *sub_flow)
967 {
968 struct nfp_fl_payload_link *link;
969
970 list_for_each_entry(link, &merge_flow->linked_flows, merge_flow.list)
971 if (link->sub_flow.flow == sub_flow) {
972 nfp_flower_unlink_flow(link);
973 return;
974 }
975 }
976
977 static int nfp_flower_link_flows(struct nfp_fl_payload *merge_flow,
978 struct nfp_fl_payload *sub_flow)
979 {
980 struct nfp_fl_payload_link *link;
981
982 link = kmalloc(sizeof(*link), GFP_KERNEL);
983 if (!link)
984 return -ENOMEM;
985
986 link->merge_flow.flow = merge_flow;
987 list_add_tail(&link->merge_flow.list, &merge_flow->linked_flows);
988 link->sub_flow.flow = sub_flow;
989 list_add_tail(&link->sub_flow.list, &sub_flow->linked_flows);
990
991 return 0;
992 }
993
994 /**
995 * nfp_flower_merge_offloaded_flows() - Merge 2 existing flows to single flow.
996 * @app: Pointer to the APP handle
997 * @sub_flow1: Initial flow matched to produce merge hint
998 * @sub_flow2: Post recirculation flow matched in merge hint
999 *
1000 * Combines 2 flows (if valid) to a single flow, removing the initial from hw
1001 * and offloading the new, merged flow.
1002 *
1003 * Return: negative value on error, 0 in success.
1004 */
1005 int nfp_flower_merge_offloaded_flows(struct nfp_app *app,
1006 struct nfp_fl_payload *sub_flow1,
1007 struct nfp_fl_payload *sub_flow2)
1008 {
1009 struct nfp_flower_priv *priv = app->priv;
1010 struct nfp_fl_payload *merge_flow;
1011 struct nfp_fl_key_ls merge_key_ls;
1012 struct nfp_merge_info *merge_info;
1013 u64 parent_ctx = 0;
1014 int err;
1015
1016 if (sub_flow1 == sub_flow2 ||
1017 nfp_flower_is_merge_flow(sub_flow1) ||
1018 nfp_flower_is_merge_flow(sub_flow2))
1019 return -EINVAL;
1020
1021 /* Check if the two flows are already merged */
1022 parent_ctx = (u64)(be32_to_cpu(sub_flow1->meta.host_ctx_id)) << 32;
1023 parent_ctx |= (u64)(be32_to_cpu(sub_flow2->meta.host_ctx_id));
1024 if (rhashtable_lookup_fast(&priv->merge_table,
1025 &parent_ctx, merge_table_params)) {
1026 nfp_flower_cmsg_warn(app, "The two flows are already merged.\n");
1027 return 0;
1028 }
1029
1030 err = nfp_flower_can_merge(sub_flow1, sub_flow2);
1031 if (err)
1032 return err;
1033
1034 merge_key_ls.key_size = sub_flow1->meta.key_len;
1035
1036 merge_flow = nfp_flower_allocate_new(&merge_key_ls);
1037 if (!merge_flow)
1038 return -ENOMEM;
1039
1040 merge_flow->tc_flower_cookie = (unsigned long)merge_flow;
1041 merge_flow->ingress_dev = sub_flow1->ingress_dev;
1042
1043 memcpy(merge_flow->unmasked_data, sub_flow1->unmasked_data,
1044 sub_flow1->meta.key_len);
1045 memcpy(merge_flow->mask_data, sub_flow1->mask_data,
1046 sub_flow1->meta.mask_len);
1047
1048 err = nfp_flower_merge_action(sub_flow1, sub_flow2, merge_flow);
1049 if (err)
1050 goto err_destroy_merge_flow;
1051
1052 err = nfp_flower_link_flows(merge_flow, sub_flow1);
1053 if (err)
1054 goto err_destroy_merge_flow;
1055
1056 err = nfp_flower_link_flows(merge_flow, sub_flow2);
1057 if (err)
1058 goto err_unlink_sub_flow1;
1059
1060 err = nfp_compile_flow_metadata(app, merge_flow->tc_flower_cookie, merge_flow,
1061 merge_flow->ingress_dev, NULL);
1062 if (err)
1063 goto err_unlink_sub_flow2;
1064
1065 err = rhashtable_insert_fast(&priv->flow_table, &merge_flow->fl_node,
1066 nfp_flower_table_params);
1067 if (err)
1068 goto err_release_metadata;
1069
1070 merge_info = kmalloc(sizeof(*merge_info), GFP_KERNEL);
1071 if (!merge_info) {
1072 err = -ENOMEM;
1073 goto err_remove_rhash;
1074 }
1075 merge_info->parent_ctx = parent_ctx;
1076 err = rhashtable_insert_fast(&priv->merge_table, &merge_info->ht_node,
1077 merge_table_params);
1078 if (err)
1079 goto err_destroy_merge_info;
1080
1081 err = nfp_flower_xmit_flow(app, merge_flow,
1082 NFP_FLOWER_CMSG_TYPE_FLOW_MOD);
1083 if (err)
1084 goto err_remove_merge_info;
1085
1086 merge_flow->in_hw = true;
1087 sub_flow1->in_hw = false;
1088
1089 return 0;
1090
1091 err_remove_merge_info:
1092 WARN_ON_ONCE(rhashtable_remove_fast(&priv->merge_table,
1093 &merge_info->ht_node,
1094 merge_table_params));
1095 err_destroy_merge_info:
1096 kfree(merge_info);
1097 err_remove_rhash:
1098 WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
1099 &merge_flow->fl_node,
1100 nfp_flower_table_params));
1101 err_release_metadata:
1102 nfp_modify_flow_metadata(app, merge_flow);
1103 err_unlink_sub_flow2:
1104 nfp_flower_unlink_flows(merge_flow, sub_flow2);
1105 err_unlink_sub_flow1:
1106 nfp_flower_unlink_flows(merge_flow, sub_flow1);
1107 err_destroy_merge_flow:
1108 kfree(merge_flow->action_data);
1109 kfree(merge_flow->mask_data);
1110 kfree(merge_flow->unmasked_data);
1111 kfree(merge_flow);
1112 return err;
1113 }
1114
1115 /**
1116 * nfp_flower_validate_pre_tun_rule()
1117 * @app: Pointer to the APP handle
1118 * @flow: Pointer to NFP flow representation of rule
1119 * @key_ls: Pointer to NFP key layers structure
1120 * @extack: Netlink extended ACK report
1121 *
1122 * Verifies the flow as a pre-tunnel rule.
1123 *
1124 * Return: negative value on error, 0 if verified.
1125 */
1126 static int
1127 nfp_flower_validate_pre_tun_rule(struct nfp_app *app,
1128 struct nfp_fl_payload *flow,
1129 struct nfp_fl_key_ls *key_ls,
1130 struct netlink_ext_ack *extack)
1131 {
1132 struct nfp_flower_priv *priv = app->priv;
1133 struct nfp_flower_meta_tci *meta_tci;
1134 struct nfp_flower_mac_mpls *mac;
1135 u8 *ext = flow->unmasked_data;
1136 struct nfp_fl_act_head *act;
1137 u8 *mask = flow->mask_data;
1138 bool vlan = false;
1139 int act_offset;
1140 u8 key_layer;
1141
1142 meta_tci = (struct nfp_flower_meta_tci *)flow->unmasked_data;
1143 key_layer = key_ls->key_layer;
1144 if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ)) {
1145 if (meta_tci->tci & cpu_to_be16(NFP_FLOWER_MASK_VLAN_PRESENT)) {
1146 u16 vlan_tci = be16_to_cpu(meta_tci->tci);
1147
1148 vlan_tci &= ~NFP_FLOWER_MASK_VLAN_PRESENT;
1149 flow->pre_tun_rule.vlan_tci = cpu_to_be16(vlan_tci);
1150 vlan = true;
1151 } else {
1152 flow->pre_tun_rule.vlan_tci = cpu_to_be16(0xffff);
1153 }
1154 }
1155
1156 if (key_layer & ~NFP_FLOWER_PRE_TUN_RULE_FIELDS) {
1157 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: too many match fields");
1158 return -EOPNOTSUPP;
1159 } else if (key_ls->key_layer_two & ~NFP_FLOWER_LAYER2_QINQ) {
1160 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: non-vlan in extended match fields");
1161 return -EOPNOTSUPP;
1162 }
1163
1164 if (!(key_layer & NFP_FLOWER_LAYER_MAC)) {
1165 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: MAC fields match required");
1166 return -EOPNOTSUPP;
1167 }
1168
1169 if (!(key_layer & NFP_FLOWER_LAYER_IPV4) &&
1170 !(key_layer & NFP_FLOWER_LAYER_IPV6)) {
1171 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: match on ipv4/ipv6 eth_type must be present");
1172 return -EOPNOTSUPP;
1173 }
1174
1175 if (key_layer & NFP_FLOWER_LAYER_IPV6)
1176 flow->pre_tun_rule.is_ipv6 = true;
1177 else
1178 flow->pre_tun_rule.is_ipv6 = false;
1179
1180 /* Skip fields known to exist. */
1181 mask += sizeof(struct nfp_flower_meta_tci);
1182 ext += sizeof(struct nfp_flower_meta_tci);
1183 if (key_ls->key_layer_two) {
1184 mask += sizeof(struct nfp_flower_ext_meta);
1185 ext += sizeof(struct nfp_flower_ext_meta);
1186 }
1187 mask += sizeof(struct nfp_flower_in_port);
1188 ext += sizeof(struct nfp_flower_in_port);
1189
1190 /* Ensure destination MAC address is fully matched. */
1191 mac = (struct nfp_flower_mac_mpls *)mask;
1192 if (!is_broadcast_ether_addr(&mac->mac_dst[0])) {
1193 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: dest MAC field must not be masked");
1194 return -EOPNOTSUPP;
1195 }
1196
1197 /* Ensure source MAC address is fully matched. This is only needed
1198 * for firmware with the DECAP_V2 feature enabled. Don't do this
1199 * for firmware without this feature to keep old behaviour.
1200 */
1201 if (priv->flower_ext_feats & NFP_FL_FEATS_DECAP_V2) {
1202 mac = (struct nfp_flower_mac_mpls *)mask;
1203 if (!is_broadcast_ether_addr(&mac->mac_src[0])) {
1204 NL_SET_ERR_MSG_MOD(extack,
1205 "unsupported pre-tunnel rule: source MAC field must not be masked");
1206 return -EOPNOTSUPP;
1207 }
1208 }
1209
1210 if (mac->mpls_lse) {
1211 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: MPLS not supported");
1212 return -EOPNOTSUPP;
1213 }
1214
1215 /* Ensure destination MAC address matches pre_tun_dev. */
1216 mac = (struct nfp_flower_mac_mpls *)ext;
1217 if (memcmp(&mac->mac_dst[0], flow->pre_tun_rule.dev->dev_addr, 6)) {
1218 NL_SET_ERR_MSG_MOD(extack,
1219 "unsupported pre-tunnel rule: dest MAC must match output dev MAC");
1220 return -EOPNOTSUPP;
1221 }
1222
1223 /* Save mac addresses in pre_tun_rule entry for later use */
1224 memcpy(&flow->pre_tun_rule.loc_mac, &mac->mac_dst[0], ETH_ALEN);
1225 memcpy(&flow->pre_tun_rule.rem_mac, &mac->mac_src[0], ETH_ALEN);
1226
1227 mask += sizeof(struct nfp_flower_mac_mpls);
1228 ext += sizeof(struct nfp_flower_mac_mpls);
1229 if (key_layer & NFP_FLOWER_LAYER_IPV4 ||
1230 key_layer & NFP_FLOWER_LAYER_IPV6) {
1231 /* Flags and proto fields have same offset in IPv4 and IPv6. */
1232 int ip_flags = offsetof(struct nfp_flower_ipv4, ip_ext.flags);
1233 int ip_proto = offsetof(struct nfp_flower_ipv4, ip_ext.proto);
1234 int size;
1235 int i;
1236
1237 size = key_layer & NFP_FLOWER_LAYER_IPV4 ?
1238 sizeof(struct nfp_flower_ipv4) :
1239 sizeof(struct nfp_flower_ipv6);
1240
1241
1242 /* Ensure proto and flags are the only IP layer fields. */
1243 for (i = 0; i < size; i++)
1244 if (mask[i] && i != ip_flags && i != ip_proto) {
1245 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: only flags and proto can be matched in ip header");
1246 return -EOPNOTSUPP;
1247 }
1248 ext += size;
1249 mask += size;
1250 }
1251
1252 if ((priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ)) {
1253 if (key_ls->key_layer_two & NFP_FLOWER_LAYER2_QINQ) {
1254 struct nfp_flower_vlan *vlan_tags;
1255 u16 vlan_tpid;
1256 u16 vlan_tci;
1257
1258 vlan_tags = (struct nfp_flower_vlan *)ext;
1259
1260 vlan_tci = be16_to_cpu(vlan_tags->outer_tci);
1261 vlan_tpid = be16_to_cpu(vlan_tags->outer_tpid);
1262
1263 vlan_tci &= ~NFP_FLOWER_MASK_VLAN_PRESENT;
1264 flow->pre_tun_rule.vlan_tci = cpu_to_be16(vlan_tci);
1265 flow->pre_tun_rule.vlan_tpid = cpu_to_be16(vlan_tpid);
1266 vlan = true;
1267 } else {
1268 flow->pre_tun_rule.vlan_tci = cpu_to_be16(0xffff);
1269 flow->pre_tun_rule.vlan_tpid = cpu_to_be16(0xffff);
1270 }
1271 }
1272
1273 /* Action must be a single egress or pop_vlan and egress. */
1274 act_offset = 0;
1275 act = (struct nfp_fl_act_head *)&flow->action_data[act_offset];
1276 if (vlan) {
1277 if (act->jump_id != NFP_FL_ACTION_OPCODE_POP_VLAN) {
1278 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: match on VLAN must have VLAN pop as first action");
1279 return -EOPNOTSUPP;
1280 }
1281
1282 act_offset += act->len_lw << NFP_FL_LW_SIZ;
1283 act = (struct nfp_fl_act_head *)&flow->action_data[act_offset];
1284 }
1285
1286 if (act->jump_id != NFP_FL_ACTION_OPCODE_OUTPUT) {
1287 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: non egress action detected where egress was expected");
1288 return -EOPNOTSUPP;
1289 }
1290
1291 act_offset += act->len_lw << NFP_FL_LW_SIZ;
1292
1293 /* Ensure there are no more actions after egress. */
1294 if (act_offset != flow->meta.act_len) {
1295 NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: egress is not the last action");
1296 return -EOPNOTSUPP;
1297 }
1298
1299 return 0;
1300 }
1301
1302 static bool offload_pre_check(struct flow_cls_offload *flow)
1303 {
1304 struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
1305 struct flow_dissector *dissector = rule->match.dissector;
1306 struct flow_match_ct ct;
1307
1308 if (dissector->used_keys & BIT_ULL(FLOW_DISSECTOR_KEY_CT)) {
1309 flow_rule_match_ct(rule, &ct);
1310 /* Allow special case where CT match is all 0 */
1311 if (memchr_inv(ct.key, 0, sizeof(*ct.key)))
1312 return false;
1313 }
1314
1315 if (flow->common.chain_index)
1316 return false;
1317
1318 return true;
1319 }
1320
1321 /**
1322 * nfp_flower_add_offload() - Adds a new flow to hardware.
1323 * @app: Pointer to the APP handle
1324 * @netdev: netdev structure.
1325 * @flow: TC flower classifier offload structure.
1326 *
1327 * Adds a new flow to the repeated hash structure and action payload.
1328 *
1329 * Return: negative value on error, 0 if configured successfully.
1330 */
1331 static int
1332 nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
1333 struct flow_cls_offload *flow)
1334 {
1335 struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
1336 enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE;
1337 struct nfp_flower_priv *priv = app->priv;
1338 struct netlink_ext_ack *extack = NULL;
1339 struct nfp_fl_payload *flow_pay;
1340 struct nfp_fl_key_ls *key_layer;
1341 struct nfp_port *port = NULL;
1342 int err;
1343
1344 extack = flow->common.extack;
1345 if (nfp_netdev_is_nfp_repr(netdev))
1346 port = nfp_port_from_netdev(netdev);
1347
1348 if (is_pre_ct_flow(flow))
1349 return nfp_fl_ct_handle_pre_ct(priv, netdev, flow, extack, NULL);
1350
1351 if (is_post_ct_flow(flow))
1352 return nfp_fl_ct_handle_post_ct(priv, netdev, flow, extack);
1353
1354 if (!offload_pre_check(flow))
1355 return -EOPNOTSUPP;
1356
1357 key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
1358 if (!key_layer)
1359 return -ENOMEM;
1360
1361 err = nfp_flower_calculate_key_layers(app, netdev, key_layer, rule,
1362 &tun_type, extack);
1363 if (err)
1364 goto err_free_key_ls;
1365
1366 flow_pay = nfp_flower_allocate_new(key_layer);
1367 if (!flow_pay) {
1368 err = -ENOMEM;
1369 goto err_free_key_ls;
1370 }
1371
1372 err = nfp_flower_compile_flow_match(app, rule, key_layer, netdev,
1373 flow_pay, tun_type, extack);
1374 if (err)
1375 goto err_destroy_flow;
1376
1377 err = nfp_flower_compile_action(app, rule, netdev, flow_pay, extack);
1378 if (err)
1379 goto err_destroy_flow;
1380
1381 if (flow_pay->pre_tun_rule.dev) {
1382 err = nfp_flower_validate_pre_tun_rule(app, flow_pay, key_layer, extack);
1383 if (err)
1384 goto err_destroy_flow;
1385 }
1386
1387 err = nfp_compile_flow_metadata(app, flow->cookie, flow_pay, netdev, extack);
1388 if (err)
1389 goto err_destroy_flow;
1390
1391 flow_pay->tc_flower_cookie = flow->cookie;
1392 err = rhashtable_insert_fast(&priv->flow_table, &flow_pay->fl_node,
1393 nfp_flower_table_params);
1394 if (err) {
1395 NL_SET_ERR_MSG_MOD(extack, "invalid entry: cannot insert flow into tables for offloads");
1396 goto err_release_metadata;
1397 }
1398
1399 if (flow_pay->pre_tun_rule.dev) {
1400 if (priv->flower_ext_feats & NFP_FL_FEATS_DECAP_V2) {
1401 struct nfp_predt_entry *predt;
1402
1403 predt = kzalloc(sizeof(*predt), GFP_KERNEL);
1404 if (!predt) {
1405 err = -ENOMEM;
1406 goto err_remove_rhash;
1407 }
1408 predt->flow_pay = flow_pay;
1409 INIT_LIST_HEAD(&predt->nn_list);
1410 spin_lock_bh(&priv->predt_lock);
1411 list_add(&predt->list_head, &priv->predt_list);
1412 flow_pay->pre_tun_rule.predt = predt;
1413 nfp_tun_link_and_update_nn_entries(app, predt);
1414 spin_unlock_bh(&priv->predt_lock);
1415 } else {
1416 err = nfp_flower_xmit_pre_tun_flow(app, flow_pay);
1417 }
1418 } else {
1419 err = nfp_flower_xmit_flow(app, flow_pay,
1420 NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
1421 }
1422
1423 if (err)
1424 goto err_remove_rhash;
1425
1426 if (port)
1427 port->tc_offload_cnt++;
1428
1429 flow_pay->in_hw = true;
1430
1431 /* Deallocate flow payload when flower rule has been destroyed. */
1432 kfree(key_layer);
1433
1434 return 0;
1435
1436 err_remove_rhash:
1437 WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
1438 &flow_pay->fl_node,
1439 nfp_flower_table_params));
1440 err_release_metadata:
1441 nfp_modify_flow_metadata(app, flow_pay);
1442 err_destroy_flow:
1443 if (flow_pay->nfp_tun_ipv6)
1444 nfp_tunnel_put_ipv6_off(app, flow_pay->nfp_tun_ipv6);
1445 kfree(flow_pay->action_data);
1446 kfree(flow_pay->mask_data);
1447 kfree(flow_pay->unmasked_data);
1448 kfree(flow_pay);
1449 err_free_key_ls:
1450 kfree(key_layer);
1451 return err;
1452 }
1453
1454 static void
1455 nfp_flower_remove_merge_flow(struct nfp_app *app,
1456 struct nfp_fl_payload *del_sub_flow,
1457 struct nfp_fl_payload *merge_flow)
1458 {
1459 struct nfp_flower_priv *priv = app->priv;
1460 struct nfp_fl_payload_link *link, *temp;
1461 struct nfp_merge_info *merge_info;
1462 struct nfp_fl_payload *origin;
1463 u64 parent_ctx = 0;
1464 bool mod = false;
1465 int err;
1466
1467 link = list_first_entry(&merge_flow->linked_flows,
1468 struct nfp_fl_payload_link, merge_flow.list);
1469 origin = link->sub_flow.flow;
1470
1471 /* Re-add rule the merge had overwritten if it has not been deleted. */
1472 if (origin != del_sub_flow)
1473 mod = true;
1474
1475 err = nfp_modify_flow_metadata(app, merge_flow);
1476 if (err) {
1477 nfp_flower_cmsg_warn(app, "Metadata fail for merge flow delete.\n");
1478 goto err_free_links;
1479 }
1480
1481 if (!mod) {
1482 err = nfp_flower_xmit_flow(app, merge_flow,
1483 NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
1484 if (err) {
1485 nfp_flower_cmsg_warn(app, "Failed to delete merged flow.\n");
1486 goto err_free_links;
1487 }
1488 } else {
1489 __nfp_modify_flow_metadata(priv, origin);
1490 err = nfp_flower_xmit_flow(app, origin,
1491 NFP_FLOWER_CMSG_TYPE_FLOW_MOD);
1492 if (err)
1493 nfp_flower_cmsg_warn(app, "Failed to revert merge flow.\n");
1494 origin->in_hw = true;
1495 }
1496
1497 err_free_links:
1498 /* Clean any links connected with the merged flow. */
1499 list_for_each_entry_safe(link, temp, &merge_flow->linked_flows,
1500 merge_flow.list) {
1501 u32 ctx_id = be32_to_cpu(link->sub_flow.flow->meta.host_ctx_id);
1502
1503 parent_ctx = (parent_ctx << 32) | (u64)(ctx_id);
1504 nfp_flower_unlink_flow(link);
1505 }
1506
1507 merge_info = rhashtable_lookup_fast(&priv->merge_table,
1508 &parent_ctx,
1509 merge_table_params);
1510 if (merge_info) {
1511 WARN_ON_ONCE(rhashtable_remove_fast(&priv->merge_table,
1512 &merge_info->ht_node,
1513 merge_table_params));
1514 kfree(merge_info);
1515 }
1516
1517 kfree(merge_flow->action_data);
1518 kfree(merge_flow->mask_data);
1519 kfree(merge_flow->unmasked_data);
1520 WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
1521 &merge_flow->fl_node,
1522 nfp_flower_table_params));
1523 kfree_rcu(merge_flow, rcu);
1524 }
1525
1526 void
1527 nfp_flower_del_linked_merge_flows(struct nfp_app *app,
1528 struct nfp_fl_payload *sub_flow)
1529 {
1530 struct nfp_fl_payload_link *link, *temp;
1531
1532 /* Remove any merge flow formed from the deleted sub_flow. */
1533 list_for_each_entry_safe(link, temp, &sub_flow->linked_flows,
1534 sub_flow.list)
1535 nfp_flower_remove_merge_flow(app, sub_flow,
1536 link->merge_flow.flow);
1537 }
1538
1539 /**
1540 * nfp_flower_del_offload() - Removes a flow from hardware.
1541 * @app: Pointer to the APP handle
1542 * @netdev: netdev structure.
1543 * @flow: TC flower classifier offload structure
1544 *
1545 * Removes a flow from the repeated hash structure and clears the
1546 * action payload. Any flows merged from this are also deleted.
1547 *
1548 * Return: negative value on error, 0 if removed successfully.
1549 */
1550 static int
1551 nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev,
1552 struct flow_cls_offload *flow)
1553 {
1554 struct nfp_flower_priv *priv = app->priv;
1555 struct nfp_fl_ct_map_entry *ct_map_ent;
1556 struct netlink_ext_ack *extack = NULL;
1557 struct nfp_fl_payload *nfp_flow;
1558 struct nfp_port *port = NULL;
1559 int err;
1560
1561 extack = flow->common.extack;
1562 if (nfp_netdev_is_nfp_repr(netdev))
1563 port = nfp_port_from_netdev(netdev);
1564
1565 /* Check ct_map_table */
1566 ct_map_ent = rhashtable_lookup_fast(&priv->ct_map_table, &flow->cookie,
1567 nfp_ct_map_params);
1568 if (ct_map_ent) {
1569 err = nfp_fl_ct_del_flow(ct_map_ent);
1570 return err;
1571 }
1572
1573 nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, netdev);
1574 if (!nfp_flow) {
1575 NL_SET_ERR_MSG_MOD(extack, "invalid entry: cannot remove flow that does not exist");
1576 return -ENOENT;
1577 }
1578
1579 err = nfp_modify_flow_metadata(app, nfp_flow);
1580 if (err)
1581 goto err_free_merge_flow;
1582
1583 if (nfp_flow->nfp_tun_ipv4_addr)
1584 nfp_tunnel_del_ipv4_off(app, nfp_flow->nfp_tun_ipv4_addr);
1585
1586 if (nfp_flow->nfp_tun_ipv6)
1587 nfp_tunnel_put_ipv6_off(app, nfp_flow->nfp_tun_ipv6);
1588
1589 if (!nfp_flow->in_hw) {
1590 err = 0;
1591 goto err_free_merge_flow;
1592 }
1593
1594 if (nfp_flow->pre_tun_rule.dev) {
1595 if (priv->flower_ext_feats & NFP_FL_FEATS_DECAP_V2) {
1596 struct nfp_predt_entry *predt;
1597
1598 predt = nfp_flow->pre_tun_rule.predt;
1599 if (predt) {
1600 spin_lock_bh(&priv->predt_lock);
1601 nfp_tun_unlink_and_update_nn_entries(app, predt);
1602 list_del(&predt->list_head);
1603 spin_unlock_bh(&priv->predt_lock);
1604 kfree(predt);
1605 }
1606 } else {
1607 err = nfp_flower_xmit_pre_tun_del_flow(app, nfp_flow);
1608 }
1609 } else {
1610 err = nfp_flower_xmit_flow(app, nfp_flow,
1611 NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
1612 }
1613 /* Fall through on error. */
1614
1615 err_free_merge_flow:
1616 nfp_flower_del_linked_merge_flows(app, nfp_flow);
1617 if (port)
1618 port->tc_offload_cnt--;
1619 kfree(nfp_flow->action_data);
1620 kfree(nfp_flow->mask_data);
1621 kfree(nfp_flow->unmasked_data);
1622 WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
1623 &nfp_flow->fl_node,
1624 nfp_flower_table_params));
1625 kfree_rcu(nfp_flow, rcu);
1626 return err;
1627 }
1628
1629 static void
1630 __nfp_flower_update_merge_stats(struct nfp_app *app,
1631 struct nfp_fl_payload *merge_flow)
1632 {
1633 struct nfp_flower_priv *priv = app->priv;
1634 struct nfp_fl_payload_link *link;
1635 struct nfp_fl_payload *sub_flow;
1636 u64 pkts, bytes, used;
1637 u32 ctx_id;
1638
1639 ctx_id = be32_to_cpu(merge_flow->meta.host_ctx_id);
1640 pkts = priv->stats[ctx_id].pkts;
1641 /* Do not cycle subflows if no stats to distribute. */
1642 if (!pkts)
1643 return;
1644 bytes = priv->stats[ctx_id].bytes;
1645 used = priv->stats[ctx_id].used;
1646
1647 /* Reset stats for the merge flow. */
1648 priv->stats[ctx_id].pkts = 0;
1649 priv->stats[ctx_id].bytes = 0;
1650
1651 /* The merge flow has received stats updates from firmware.
1652 * Distribute these stats to all subflows that form the merge.
1653 * The stats will collected from TC via the subflows.
1654 */
1655 list_for_each_entry(link, &merge_flow->linked_flows, merge_flow.list) {
1656 sub_flow = link->sub_flow.flow;
1657 ctx_id = be32_to_cpu(sub_flow->meta.host_ctx_id);
1658 priv->stats[ctx_id].pkts += pkts;
1659 priv->stats[ctx_id].bytes += bytes;
1660 priv->stats[ctx_id].used = max_t(u64, used,
1661 priv->stats[ctx_id].used);
1662 }
1663 }
1664
1665 void
1666 nfp_flower_update_merge_stats(struct nfp_app *app,
1667 struct nfp_fl_payload *sub_flow)
1668 {
1669 struct nfp_fl_payload_link *link;
1670
1671 /* Get merge flows that the subflow forms to distribute their stats. */
1672 list_for_each_entry(link, &sub_flow->linked_flows, sub_flow.list)
1673 __nfp_flower_update_merge_stats(app, link->merge_flow.flow);
1674 }
1675
1676 /**
1677 * nfp_flower_get_stats() - Populates flow stats obtained from hardware.
1678 * @app: Pointer to the APP handle
1679 * @netdev: Netdev structure.
1680 * @flow: TC flower classifier offload structure
1681 *
1682 * Populates a flow statistics structure which which corresponds to a
1683 * specific flow.
1684 *
1685 * Return: negative value on error, 0 if stats populated successfully.
1686 */
1687 static int
1688 nfp_flower_get_stats(struct nfp_app *app, struct net_device *netdev,
1689 struct flow_cls_offload *flow)
1690 {
1691 struct nfp_flower_priv *priv = app->priv;
1692 struct nfp_fl_ct_map_entry *ct_map_ent;
1693 struct netlink_ext_ack *extack = NULL;
1694 struct nfp_fl_payload *nfp_flow;
1695 u32 ctx_id;
1696
1697 /* Check ct_map table first */
1698 ct_map_ent = rhashtable_lookup_fast(&priv->ct_map_table, &flow->cookie,
1699 nfp_ct_map_params);
1700 if (ct_map_ent)
1701 return nfp_fl_ct_stats(flow, ct_map_ent);
1702
1703 extack = flow->common.extack;
1704 nfp_flow = nfp_flower_search_fl_table(app, flow->cookie, netdev);
1705 if (!nfp_flow) {
1706 NL_SET_ERR_MSG_MOD(extack, "invalid entry: cannot dump stats for flow that does not exist");
1707 return -EINVAL;
1708 }
1709
1710 ctx_id = be32_to_cpu(nfp_flow->meta.host_ctx_id);
1711
1712 spin_lock_bh(&priv->stats_lock);
1713 /* If request is for a sub_flow, update stats from merged flows. */
1714 if (!list_empty(&nfp_flow->linked_flows))
1715 nfp_flower_update_merge_stats(app, nfp_flow);
1716
1717 flow_stats_update(&flow->stats, priv->stats[ctx_id].bytes,
1718 priv->stats[ctx_id].pkts, 0, priv->stats[ctx_id].used,
1719 FLOW_ACTION_HW_STATS_DELAYED);
1720
1721 priv->stats[ctx_id].pkts = 0;
1722 priv->stats[ctx_id].bytes = 0;
1723 spin_unlock_bh(&priv->stats_lock);
1724
1725 return 0;
1726 }
1727
1728 static int
1729 nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev,
1730 struct flow_cls_offload *flower)
1731 {
1732 struct nfp_flower_priv *priv = app->priv;
1733 int ret;
1734
1735 if (!eth_proto_is_802_3(flower->common.protocol))
1736 return -EOPNOTSUPP;
1737
1738 mutex_lock(&priv->nfp_fl_lock);
1739 switch (flower->command) {
1740 case FLOW_CLS_REPLACE:
1741 ret = nfp_flower_add_offload(app, netdev, flower);
1742 break;
1743 case FLOW_CLS_DESTROY:
1744 ret = nfp_flower_del_offload(app, netdev, flower);
1745 break;
1746 case FLOW_CLS_STATS:
1747 ret = nfp_flower_get_stats(app, netdev, flower);
1748 break;
1749 default:
1750 ret = -EOPNOTSUPP;
1751 break;
1752 }
1753 mutex_unlock(&priv->nfp_fl_lock);
1754
1755 return ret;
1756 }
1757
1758 static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type,
1759 void *type_data, void *cb_priv)
1760 {
1761 struct flow_cls_common_offload *common = type_data;
1762 struct nfp_repr *repr = cb_priv;
1763
1764 if (!tc_can_offload_extack(repr->netdev, common->extack))
1765 return -EOPNOTSUPP;
1766
1767 switch (type) {
1768 case TC_SETUP_CLSFLOWER:
1769 return nfp_flower_repr_offload(repr->app, repr->netdev,
1770 type_data);
1771 case TC_SETUP_CLSMATCHALL:
1772 return nfp_flower_setup_qos_offload(repr->app, repr->netdev,
1773 type_data);
1774 default:
1775 return -EOPNOTSUPP;
1776 }
1777 }
1778
1779 static LIST_HEAD(nfp_block_cb_list);
1780
1781 static int nfp_flower_setup_tc_block(struct net_device *netdev,
1782 struct flow_block_offload *f)
1783 {
1784 struct nfp_repr *repr = netdev_priv(netdev);
1785 struct nfp_flower_repr_priv *repr_priv;
1786 struct flow_block_cb *block_cb;
1787
1788 if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
1789 return -EOPNOTSUPP;
1790
1791 repr_priv = repr->app_priv;
1792 repr_priv->block_shared = f->block_shared;
1793 f->driver_block_list = &nfp_block_cb_list;
1794 f->unlocked_driver_cb = true;
1795
1796 switch (f->command) {
1797 case FLOW_BLOCK_BIND:
1798 if (flow_block_cb_is_busy(nfp_flower_setup_tc_block_cb, repr,
1799 &nfp_block_cb_list))
1800 return -EBUSY;
1801
1802 block_cb = flow_block_cb_alloc(nfp_flower_setup_tc_block_cb,
1803 repr, repr, NULL);
1804 if (IS_ERR(block_cb))
1805 return PTR_ERR(block_cb);
1806
1807 flow_block_cb_add(block_cb, f);
1808 list_add_tail(&block_cb->driver_list, &nfp_block_cb_list);
1809 return 0;
1810 case FLOW_BLOCK_UNBIND:
1811 block_cb = flow_block_cb_lookup(f->block,
1812 nfp_flower_setup_tc_block_cb,
1813 repr);
1814 if (!block_cb)
1815 return -ENOENT;
1816
1817 flow_block_cb_remove(block_cb, f);
1818 list_del(&block_cb->driver_list);
1819 return 0;
1820 default:
1821 return -EOPNOTSUPP;
1822 }
1823 }
1824
1825 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
1826 enum tc_setup_type type, void *type_data)
1827 {
1828 switch (type) {
1829 case TC_SETUP_BLOCK:
1830 return nfp_flower_setup_tc_block(netdev, type_data);
1831 default:
1832 return -EOPNOTSUPP;
1833 }
1834 }
1835
1836 struct nfp_flower_indr_block_cb_priv {
1837 struct net_device *netdev;
1838 struct nfp_app *app;
1839 struct list_head list;
1840 };
1841
1842 static struct nfp_flower_indr_block_cb_priv *
1843 nfp_flower_indr_block_cb_priv_lookup(struct nfp_app *app,
1844 struct net_device *netdev)
1845 {
1846 struct nfp_flower_indr_block_cb_priv *cb_priv;
1847 struct nfp_flower_priv *priv = app->priv;
1848
1849 list_for_each_entry(cb_priv, &priv->indr_block_cb_priv, list)
1850 if (cb_priv->netdev == netdev)
1851 return cb_priv;
1852
1853 return NULL;
1854 }
1855
1856 static int nfp_flower_setup_indr_block_cb(enum tc_setup_type type,
1857 void *type_data, void *cb_priv)
1858 {
1859 struct nfp_flower_indr_block_cb_priv *priv = cb_priv;
1860
1861 switch (type) {
1862 case TC_SETUP_CLSFLOWER:
1863 return nfp_flower_repr_offload(priv->app, priv->netdev,
1864 type_data);
1865 default:
1866 return -EOPNOTSUPP;
1867 }
1868 }
1869
1870 void nfp_flower_setup_indr_tc_release(void *cb_priv)
1871 {
1872 struct nfp_flower_indr_block_cb_priv *priv = cb_priv;
1873
1874 list_del(&priv->list);
1875 kfree(priv);
1876 }
1877
1878 static int
1879 nfp_flower_setup_indr_tc_block(struct net_device *netdev, struct Qdisc *sch, struct nfp_app *app,
1880 struct flow_block_offload *f, void *data,
1881 void (*cleanup)(struct flow_block_cb *block_cb))
1882 {
1883 struct nfp_flower_indr_block_cb_priv *cb_priv;
1884 struct nfp_flower_priv *priv = app->priv;
1885 struct flow_block_cb *block_cb;
1886
1887 if ((f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS &&
1888 !nfp_flower_internal_port_can_offload(app, netdev)) ||
1889 (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS &&
1890 nfp_flower_internal_port_can_offload(app, netdev)))
1891 return -EOPNOTSUPP;
1892
1893 f->unlocked_driver_cb = true;
1894
1895 switch (f->command) {
1896 case FLOW_BLOCK_BIND:
1897 cb_priv = nfp_flower_indr_block_cb_priv_lookup(app, netdev);
1898 if (cb_priv &&
1899 flow_block_cb_is_busy(nfp_flower_setup_indr_block_cb,
1900 cb_priv,
1901 &nfp_block_cb_list))
1902 return -EBUSY;
1903
1904 cb_priv = kmalloc(sizeof(*cb_priv), GFP_KERNEL);
1905 if (!cb_priv)
1906 return -ENOMEM;
1907
1908 cb_priv->netdev = netdev;
1909 cb_priv->app = app;
1910 list_add(&cb_priv->list, &priv->indr_block_cb_priv);
1911
1912 block_cb = flow_indr_block_cb_alloc(nfp_flower_setup_indr_block_cb,
1913 cb_priv, cb_priv,
1914 nfp_flower_setup_indr_tc_release,
1915 f, netdev, sch, data, app, cleanup);
1916 if (IS_ERR(block_cb)) {
1917 list_del(&cb_priv->list);
1918 kfree(cb_priv);
1919 return PTR_ERR(block_cb);
1920 }
1921
1922 flow_block_cb_add(block_cb, f);
1923 list_add_tail(&block_cb->driver_list, &nfp_block_cb_list);
1924 return 0;
1925 case FLOW_BLOCK_UNBIND:
1926 cb_priv = nfp_flower_indr_block_cb_priv_lookup(app, netdev);
1927 if (!cb_priv)
1928 return -ENOENT;
1929
1930 block_cb = flow_block_cb_lookup(f->block,
1931 nfp_flower_setup_indr_block_cb,
1932 cb_priv);
1933 if (!block_cb)
1934 return -ENOENT;
1935
1936 flow_indr_block_cb_remove(block_cb, f);
1937 list_del(&block_cb->driver_list);
1938 return 0;
1939 default:
1940 return -EOPNOTSUPP;
1941 }
1942 return 0;
1943 }
1944
1945 static int
1946 nfp_setup_tc_no_dev(struct nfp_app *app, enum tc_setup_type type, void *data)
1947 {
1948 if (!data)
1949 return -EOPNOTSUPP;
1950
1951 switch (type) {
1952 case TC_SETUP_ACT:
1953 return nfp_setup_tc_act_offload(app, data);
1954 default:
1955 return -EOPNOTSUPP;
1956 }
1957 }
1958
1959 int
1960 nfp_flower_indr_setup_tc_cb(struct net_device *netdev, struct Qdisc *sch, void *cb_priv,
1961 enum tc_setup_type type, void *type_data,
1962 void *data,
1963 void (*cleanup)(struct flow_block_cb *block_cb))
1964 {
1965 if (!netdev)
1966 return nfp_setup_tc_no_dev(cb_priv, type, data);
1967
1968 if (!nfp_fl_is_netdev_to_offload(netdev))
1969 return -EOPNOTSUPP;
1970
1971 switch (type) {
1972 case TC_SETUP_BLOCK:
1973 return nfp_flower_setup_indr_tc_block(netdev, sch, cb_priv,
1974 type_data, data, cleanup);
1975 default:
1976 return -EOPNOTSUPP;
1977 }
1978 }
Kernel DRM miscellaneous fixes and cross-tree changes