This source file includes following definitions.
- bnxt_flow_get_dst_fid
- bnxt_tc_parse_redir
- bnxt_tc_parse_vlan
- bnxt_tc_parse_tunnel_set
- bnxt_tc_parse_actions
- bnxt_tc_parse_flow
- bnxt_hwrm_cfa_flow_free
- ipv6_mask_len
- is_wildcard
- is_exactmatch
- is_vlan_tci_allowed
- bits_set
- bnxt_hwrm_cfa_flow_alloc
- hwrm_cfa_decap_filter_alloc
- hwrm_cfa_decap_filter_free
- hwrm_cfa_encap_record_alloc
- hwrm_cfa_encap_record_free
- bnxt_tc_put_l2_node
- bnxt_tc_get_l2_node
- bnxt_tc_get_ref_flow_handle
- bnxt_tc_can_offload
- bnxt_tc_put_tunnel_node
- bnxt_tc_get_tunnel_node
- bnxt_tc_get_ref_decap_handle
- bnxt_tc_put_decap_l2_node
- bnxt_tc_put_decap_handle
- bnxt_tc_resolve_tunnel_hdrs
- bnxt_tc_get_decap_handle
- bnxt_tc_put_encap_handle
- bnxt_tc_get_encap_handle
- bnxt_tc_put_tunnel_handle
- bnxt_tc_get_tunnel_handle
- __bnxt_tc_del_flow
- bnxt_tc_set_flow_dir
- bnxt_tc_set_src_fid
- bnxt_tc_add_flow
- bnxt_tc_del_flow
- bnxt_tc_get_flow_stats
- bnxt_fill_cfa_stats_req
- bnxt_hwrm_cfa_flow_stats_get
- accumulate_val
- bnxt_flow_stats_accum
- bnxt_tc_flow_stats_batch_update
- bnxt_tc_flow_stats_batch_prep
- bnxt_tc_flow_stats_work
- bnxt_tc_setup_flower
- bnxt_init_tc
- bnxt_shutdown_tc
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10 #include <linux/netdevice.h>
11 #include <linux/inetdevice.h>
12 #include <linux/if_vlan.h>
13 #include <net/flow_dissector.h>
14 #include <net/pkt_cls.h>
15 #include <net/tc_act/tc_gact.h>
16 #include <net/tc_act/tc_skbedit.h>
17 #include <net/tc_act/tc_mirred.h>
18 #include <net/tc_act/tc_vlan.h>
19 #include <net/tc_act/tc_tunnel_key.h>
20
21 #include "bnxt_hsi.h"
22 #include "bnxt.h"
23 #include "bnxt_sriov.h"
24 #include "bnxt_tc.h"
25 #include "bnxt_vfr.h"
26
27 #define BNXT_FID_INVALID 0xffff
28 #define VLAN_TCI(vid, prio) ((vid) | ((prio) << VLAN_PRIO_SHIFT))
29
30 #define is_vlan_pcp_wildcarded(vlan_tci_mask) \
31 ((ntohs(vlan_tci_mask) & VLAN_PRIO_MASK) == 0x0000)
32 #define is_vlan_pcp_exactmatch(vlan_tci_mask) \
33 ((ntohs(vlan_tci_mask) & VLAN_PRIO_MASK) == VLAN_PRIO_MASK)
34 #define is_vlan_pcp_zero(vlan_tci) \
35 ((ntohs(vlan_tci) & VLAN_PRIO_MASK) == 0x0000)
36 #define is_vid_exactmatch(vlan_tci_mask) \
37 ((ntohs(vlan_tci_mask) & VLAN_VID_MASK) == VLAN_VID_MASK)
38
39
40
41
42
43 static u16 bnxt_flow_get_dst_fid(struct bnxt *pf_bp, struct net_device *dev)
44 {
45 struct bnxt *bp;
46
47
48 if (!netdev_port_same_parent_id(pf_bp->dev, dev)) {
49 netdev_info(pf_bp->dev, "dev(ifindex=%d) not on same switch",
50 dev->ifindex);
51 return BNXT_FID_INVALID;
52 }
53
54
55 if (bnxt_dev_is_vf_rep(dev))
56 return bnxt_vf_rep_get_fid(dev);
57
58 bp = netdev_priv(dev);
59 return bp->pf.fw_fid;
60 }
61
62 static int bnxt_tc_parse_redir(struct bnxt *bp,
63 struct bnxt_tc_actions *actions,
64 const struct flow_action_entry *act)
65 {
66 struct net_device *dev = act->dev;
67
68 if (!dev) {
69 netdev_info(bp->dev, "no dev in mirred action");
70 return -EINVAL;
71 }
72
73 actions->flags |= BNXT_TC_ACTION_FLAG_FWD;
74 actions->dst_dev = dev;
75 return 0;
76 }
77
78 static int bnxt_tc_parse_vlan(struct bnxt *bp,
79 struct bnxt_tc_actions *actions,
80 const struct flow_action_entry *act)
81 {
82 switch (act->id) {
83 case FLOW_ACTION_VLAN_POP:
84 actions->flags |= BNXT_TC_ACTION_FLAG_POP_VLAN;
85 break;
86 case FLOW_ACTION_VLAN_PUSH:
87 actions->flags |= BNXT_TC_ACTION_FLAG_PUSH_VLAN;
88 actions->push_vlan_tci = htons(act->vlan.vid);
89 actions->push_vlan_tpid = act->vlan.proto;
90 break;
91 default:
92 return -EOPNOTSUPP;
93 }
94 return 0;
95 }
96
97 static int bnxt_tc_parse_tunnel_set(struct bnxt *bp,
98 struct bnxt_tc_actions *actions,
99 const struct flow_action_entry *act)
100 {
101 const struct ip_tunnel_info *tun_info = act->tunnel;
102 const struct ip_tunnel_key *tun_key = &tun_info->key;
103
104 if (ip_tunnel_info_af(tun_info) != AF_INET) {
105 netdev_info(bp->dev, "only IPv4 tunnel-encap is supported");
106 return -EOPNOTSUPP;
107 }
108
109 actions->tun_encap_key = *tun_key;
110 actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP;
111 return 0;
112 }
113
114 static int bnxt_tc_parse_actions(struct bnxt *bp,
115 struct bnxt_tc_actions *actions,
116 struct flow_action *flow_action)
117 {
118 struct flow_action_entry *act;
119 int i, rc;
120
121 if (!flow_action_has_entries(flow_action)) {
122 netdev_info(bp->dev, "no actions");
123 return -EINVAL;
124 }
125
126 flow_action_for_each(i, act, flow_action) {
127 switch (act->id) {
128 case FLOW_ACTION_DROP:
129 actions->flags |= BNXT_TC_ACTION_FLAG_DROP;
130 return 0;
131 case FLOW_ACTION_REDIRECT:
132 rc = bnxt_tc_parse_redir(bp, actions, act);
133 if (rc)
134 return rc;
135 break;
136 case FLOW_ACTION_VLAN_POP:
137 case FLOW_ACTION_VLAN_PUSH:
138 case FLOW_ACTION_VLAN_MANGLE:
139 rc = bnxt_tc_parse_vlan(bp, actions, act);
140 if (rc)
141 return rc;
142 break;
143 case FLOW_ACTION_TUNNEL_ENCAP:
144 rc = bnxt_tc_parse_tunnel_set(bp, actions, act);
145 if (rc)
146 return rc;
147 break;
148 case FLOW_ACTION_TUNNEL_DECAP:
149 actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_DECAP;
150 break;
151 default:
152 break;
153 }
154 }
155
156 if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
157 if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
158
159 actions->dst_fid = bp->pf.fw_fid;
160 } else {
161
162 actions->dst_fid =
163 bnxt_flow_get_dst_fid(bp, actions->dst_dev);
164 if (actions->dst_fid == BNXT_FID_INVALID)
165 return -EINVAL;
166 }
167 }
168
169 return 0;
170 }
171
172 static int bnxt_tc_parse_flow(struct bnxt *bp,
173 struct flow_cls_offload *tc_flow_cmd,
174 struct bnxt_tc_flow *flow)
175 {
176 struct flow_rule *rule = flow_cls_offload_flow_rule(tc_flow_cmd);
177 struct flow_dissector *dissector = rule->match.dissector;
178
179
180 if ((dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_CONTROL)) == 0 ||
181 (dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_BASIC)) == 0) {
182 netdev_info(bp->dev, "cannot form TC key: used_keys = 0x%x",
183 dissector->used_keys);
184 return -EOPNOTSUPP;
185 }
186
187 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
188 struct flow_match_basic match;
189
190 flow_rule_match_basic(rule, &match);
191 flow->l2_key.ether_type = match.key->n_proto;
192 flow->l2_mask.ether_type = match.mask->n_proto;
193
194 if (match.key->n_proto == htons(ETH_P_IP) ||
195 match.key->n_proto == htons(ETH_P_IPV6)) {
196 flow->l4_key.ip_proto = match.key->ip_proto;
197 flow->l4_mask.ip_proto = match.mask->ip_proto;
198 }
199 }
200
201 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
202 struct flow_match_eth_addrs match;
203
204 flow_rule_match_eth_addrs(rule, &match);
205 flow->flags |= BNXT_TC_FLOW_FLAGS_ETH_ADDRS;
206 ether_addr_copy(flow->l2_key.dmac, match.key->dst);
207 ether_addr_copy(flow->l2_mask.dmac, match.mask->dst);
208 ether_addr_copy(flow->l2_key.smac, match.key->src);
209 ether_addr_copy(flow->l2_mask.smac, match.mask->src);
210 }
211
212 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
213 struct flow_match_vlan match;
214
215 flow_rule_match_vlan(rule, &match);
216 flow->l2_key.inner_vlan_tci =
217 cpu_to_be16(VLAN_TCI(match.key->vlan_id,
218 match.key->vlan_priority));
219 flow->l2_mask.inner_vlan_tci =
220 cpu_to_be16((VLAN_TCI(match.mask->vlan_id,
221 match.mask->vlan_priority)));
222 flow->l2_key.inner_vlan_tpid = htons(ETH_P_8021Q);
223 flow->l2_mask.inner_vlan_tpid = htons(0xffff);
224 flow->l2_key.num_vlans = 1;
225 }
226
227 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
228 struct flow_match_ipv4_addrs match;
229
230 flow_rule_match_ipv4_addrs(rule, &match);
231 flow->flags |= BNXT_TC_FLOW_FLAGS_IPV4_ADDRS;
232 flow->l3_key.ipv4.daddr.s_addr = match.key->dst;
233 flow->l3_mask.ipv4.daddr.s_addr = match.mask->dst;
234 flow->l3_key.ipv4.saddr.s_addr = match.key->src;
235 flow->l3_mask.ipv4.saddr.s_addr = match.mask->src;
236 } else if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
237 struct flow_match_ipv6_addrs match;
238
239 flow_rule_match_ipv6_addrs(rule, &match);
240 flow->flags |= BNXT_TC_FLOW_FLAGS_IPV6_ADDRS;
241 flow->l3_key.ipv6.daddr = match.key->dst;
242 flow->l3_mask.ipv6.daddr = match.mask->dst;
243 flow->l3_key.ipv6.saddr = match.key->src;
244 flow->l3_mask.ipv6.saddr = match.mask->src;
245 }
246
247 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
248 struct flow_match_ports match;
249
250 flow_rule_match_ports(rule, &match);
251 flow->flags |= BNXT_TC_FLOW_FLAGS_PORTS;
252 flow->l4_key.ports.dport = match.key->dst;
253 flow->l4_mask.ports.dport = match.mask->dst;
254 flow->l4_key.ports.sport = match.key->src;
255 flow->l4_mask.ports.sport = match.mask->src;
256 }
257
258 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP)) {
259 struct flow_match_icmp match;
260
261 flow_rule_match_icmp(rule, &match);
262 flow->flags |= BNXT_TC_FLOW_FLAGS_ICMP;
263 flow->l4_key.icmp.type = match.key->type;
264 flow->l4_key.icmp.code = match.key->code;
265 flow->l4_mask.icmp.type = match.mask->type;
266 flow->l4_mask.icmp.code = match.mask->code;
267 }
268
269 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
270 struct flow_match_ipv4_addrs match;
271
272 flow_rule_match_enc_ipv4_addrs(rule, &match);
273 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS;
274 flow->tun_key.u.ipv4.dst = match.key->dst;
275 flow->tun_mask.u.ipv4.dst = match.mask->dst;
276 flow->tun_key.u.ipv4.src = match.key->src;
277 flow->tun_mask.u.ipv4.src = match.mask->src;
278 } else if (flow_rule_match_key(rule,
279 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS)) {
280 return -EOPNOTSUPP;
281 }
282
283 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
284 struct flow_match_enc_keyid match;
285
286 flow_rule_match_enc_keyid(rule, &match);
287 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ID;
288 flow->tun_key.tun_id = key32_to_tunnel_id(match.key->keyid);
289 flow->tun_mask.tun_id = key32_to_tunnel_id(match.mask->keyid);
290 }
291
292 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
293 struct flow_match_ports match;
294
295 flow_rule_match_enc_ports(rule, &match);
296 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_PORTS;
297 flow->tun_key.tp_dst = match.key->dst;
298 flow->tun_mask.tp_dst = match.mask->dst;
299 flow->tun_key.tp_src = match.key->src;
300 flow->tun_mask.tp_src = match.mask->src;
301 }
302
303 return bnxt_tc_parse_actions(bp, &flow->actions, &rule->action);
304 }
305
306 static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp,
307 struct bnxt_tc_flow_node *flow_node)
308 {
309 struct hwrm_cfa_flow_free_input req = { 0 };
310 int rc;
311
312 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_FREE, -1, -1);
313 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE)
314 req.ext_flow_handle = flow_node->ext_flow_handle;
315 else
316 req.flow_handle = flow_node->flow_handle;
317
318 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
319 if (rc)
320 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
321
322 return rc;
323 }
324
325 static int ipv6_mask_len(struct in6_addr *mask)
326 {
327 int mask_len = 0, i;
328
329 for (i = 0; i < 4; i++)
330 mask_len += inet_mask_len(mask->s6_addr32[i]);
331
332 return mask_len;
333 }
334
335 static bool is_wildcard(void *mask, int len)
336 {
337 const u8 *p = mask;
338 int i;
339
340 for (i = 0; i < len; i++) {
341 if (p[i] != 0)
342 return false;
343 }
344 return true;
345 }
346
347 static bool is_exactmatch(void *mask, int len)
348 {
349 const u8 *p = mask;
350 int i;
351
352 for (i = 0; i < len; i++)
353 if (p[i] != 0xff)
354 return false;
355
356 return true;
357 }
358
359 static bool is_vlan_tci_allowed(__be16 vlan_tci_mask,
360 __be16 vlan_tci)
361 {
362
363
364
365 if (is_vid_exactmatch(vlan_tci_mask) &&
366 ((is_vlan_pcp_exactmatch(vlan_tci_mask) &&
367 is_vlan_pcp_zero(vlan_tci)) ||
368 is_vlan_pcp_wildcarded(vlan_tci_mask)))
369 return true;
370
371 return false;
372 }
373
374 static bool bits_set(void *key, int len)
375 {
376 const u8 *p = key;
377 int i;
378
379 for (i = 0; i < len; i++)
380 if (p[i] != 0)
381 return true;
382
383 return false;
384 }
385
386 static int bnxt_hwrm_cfa_flow_alloc(struct bnxt *bp, struct bnxt_tc_flow *flow,
387 __le16 ref_flow_handle,
388 __le32 tunnel_handle,
389 struct bnxt_tc_flow_node *flow_node)
390 {
391 struct bnxt_tc_actions *actions = &flow->actions;
392 struct bnxt_tc_l3_key *l3_mask = &flow->l3_mask;
393 struct bnxt_tc_l3_key *l3_key = &flow->l3_key;
394 struct hwrm_cfa_flow_alloc_input req = { 0 };
395 struct hwrm_cfa_flow_alloc_output *resp;
396 u16 flow_flags = 0, action_flags = 0;
397 int rc;
398
399 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_ALLOC, -1, -1);
400
401 req.src_fid = cpu_to_le16(flow->src_fid);
402 req.ref_flow_handle = ref_flow_handle;
403
404 if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP ||
405 actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
406 req.tunnel_handle = tunnel_handle;
407 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_TUNNEL;
408 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_TUNNEL;
409 }
410
411 req.ethertype = flow->l2_key.ether_type;
412 req.ip_proto = flow->l4_key.ip_proto;
413
414 if (flow->flags & BNXT_TC_FLOW_FLAGS_ETH_ADDRS) {
415 memcpy(req.dmac, flow->l2_key.dmac, ETH_ALEN);
416 memcpy(req.smac, flow->l2_key.smac, ETH_ALEN);
417 }
418
419 if (flow->l2_key.num_vlans > 0) {
420 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_NUM_VLAN_ONE;
421
422
423
424
425 req.outer_vlan_tci = flow->l2_key.inner_vlan_tci;
426 }
427
428
429 if (is_wildcard(l3_mask, sizeof(*l3_mask)) &&
430 is_wildcard(&flow->l4_mask, sizeof(flow->l4_mask))) {
431 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_L2;
432 } else {
433 flow_flags |= flow->l2_key.ether_type == htons(ETH_P_IP) ?
434 CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV4 :
435 CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV6;
436
437 if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV4_ADDRS) {
438 req.ip_dst[0] = l3_key->ipv4.daddr.s_addr;
439 req.ip_dst_mask_len =
440 inet_mask_len(l3_mask->ipv4.daddr.s_addr);
441 req.ip_src[0] = l3_key->ipv4.saddr.s_addr;
442 req.ip_src_mask_len =
443 inet_mask_len(l3_mask->ipv4.saddr.s_addr);
444 } else if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV6_ADDRS) {
445 memcpy(req.ip_dst, l3_key->ipv6.daddr.s6_addr32,
446 sizeof(req.ip_dst));
447 req.ip_dst_mask_len =
448 ipv6_mask_len(&l3_mask->ipv6.daddr);
449 memcpy(req.ip_src, l3_key->ipv6.saddr.s6_addr32,
450 sizeof(req.ip_src));
451 req.ip_src_mask_len =
452 ipv6_mask_len(&l3_mask->ipv6.saddr);
453 }
454 }
455
456 if (flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) {
457 req.l4_src_port = flow->l4_key.ports.sport;
458 req.l4_src_port_mask = flow->l4_mask.ports.sport;
459 req.l4_dst_port = flow->l4_key.ports.dport;
460 req.l4_dst_port_mask = flow->l4_mask.ports.dport;
461 } else if (flow->flags & BNXT_TC_FLOW_FLAGS_ICMP) {
462
463 req.l4_src_port = htons(flow->l4_key.icmp.type);
464 req.l4_src_port_mask = htons(flow->l4_mask.icmp.type);
465 req.l4_dst_port = htons(flow->l4_key.icmp.code);
466 req.l4_dst_port_mask = htons(flow->l4_mask.icmp.code);
467 }
468 req.flags = cpu_to_le16(flow_flags);
469
470 if (actions->flags & BNXT_TC_ACTION_FLAG_DROP) {
471 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_DROP;
472 } else {
473 if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
474 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_FWD;
475 req.dst_fid = cpu_to_le16(actions->dst_fid);
476 }
477 if (actions->flags & BNXT_TC_ACTION_FLAG_PUSH_VLAN) {
478 action_flags |=
479 CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
480 req.l2_rewrite_vlan_tpid = actions->push_vlan_tpid;
481 req.l2_rewrite_vlan_tci = actions->push_vlan_tci;
482 memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN);
483 memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN);
484 }
485 if (actions->flags & BNXT_TC_ACTION_FLAG_POP_VLAN) {
486 action_flags |=
487 CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
488
489 req.l2_rewrite_vlan_tpid = 0;
490 memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN);
491 memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN);
492 }
493 }
494 req.action_flags = cpu_to_le16(action_flags);
495
496 mutex_lock(&bp->hwrm_cmd_lock);
497 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
498 if (!rc) {
499 resp = bnxt_get_hwrm_resp_addr(bp, &req);
500
501
502
503
504
505
506
507
508
509 flow_node->flow_handle = resp->flow_handle;
510 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) {
511 flow_node->ext_flow_handle = resp->ext_flow_handle;
512 flow_node->flow_id = resp->flow_id;
513 }
514 }
515 mutex_unlock(&bp->hwrm_cmd_lock);
516 return rc;
517 }
518
519 static int hwrm_cfa_decap_filter_alloc(struct bnxt *bp,
520 struct bnxt_tc_flow *flow,
521 struct bnxt_tc_l2_key *l2_info,
522 __le32 ref_decap_handle,
523 __le32 *decap_filter_handle)
524 {
525 struct hwrm_cfa_decap_filter_alloc_input req = { 0 };
526 struct hwrm_cfa_decap_filter_alloc_output *resp;
527 struct ip_tunnel_key *tun_key = &flow->tun_key;
528 u32 enables = 0;
529 int rc;
530
531 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_ALLOC, -1, -1);
532
533 req.flags = cpu_to_le32(CFA_DECAP_FILTER_ALLOC_REQ_FLAGS_OVS_TUNNEL);
534 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_TYPE |
535 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IP_PROTOCOL;
536 req.tunnel_type = CFA_DECAP_FILTER_ALLOC_REQ_TUNNEL_TYPE_VXLAN;
537 req.ip_protocol = CFA_DECAP_FILTER_ALLOC_REQ_IP_PROTOCOL_UDP;
538
539 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ID) {
540 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_ID;
541
542 req.tunnel_id = tunnel_id_to_key32(tun_key->tun_id);
543 }
544
545 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS) {
546 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_MACADDR;
547 ether_addr_copy(req.dst_macaddr, l2_info->dmac);
548 }
549 if (l2_info->num_vlans) {
550 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_T_IVLAN_VID;
551 req.t_ivlan_vid = l2_info->inner_vlan_tci;
552 }
553
554 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_ETHERTYPE;
555 req.ethertype = htons(ETH_P_IP);
556
557 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS) {
558 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_SRC_IPADDR |
559 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_IPADDR |
560 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IPADDR_TYPE;
561 req.ip_addr_type = CFA_DECAP_FILTER_ALLOC_REQ_IP_ADDR_TYPE_IPV4;
562 req.dst_ipaddr[0] = tun_key->u.ipv4.dst;
563 req.src_ipaddr[0] = tun_key->u.ipv4.src;
564 }
565
566 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_PORTS) {
567 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_PORT;
568 req.dst_port = tun_key->tp_dst;
569 }
570
571
572
573
574 req.l2_ctxt_ref_id = (__force __le16)ref_decap_handle;
575 req.enables = cpu_to_le32(enables);
576
577 mutex_lock(&bp->hwrm_cmd_lock);
578 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
579 if (!rc) {
580 resp = bnxt_get_hwrm_resp_addr(bp, &req);
581 *decap_filter_handle = resp->decap_filter_id;
582 } else {
583 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
584 }
585 mutex_unlock(&bp->hwrm_cmd_lock);
586
587 return rc;
588 }
589
590 static int hwrm_cfa_decap_filter_free(struct bnxt *bp,
591 __le32 decap_filter_handle)
592 {
593 struct hwrm_cfa_decap_filter_free_input req = { 0 };
594 int rc;
595
596 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_FREE, -1, -1);
597 req.decap_filter_id = decap_filter_handle;
598
599 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
600 if (rc)
601 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
602
603 return rc;
604 }
605
606 static int hwrm_cfa_encap_record_alloc(struct bnxt *bp,
607 struct ip_tunnel_key *encap_key,
608 struct bnxt_tc_l2_key *l2_info,
609 __le32 *encap_record_handle)
610 {
611 struct hwrm_cfa_encap_record_alloc_input req = { 0 };
612 struct hwrm_cfa_encap_record_alloc_output *resp;
613 struct hwrm_cfa_encap_data_vxlan *encap =
614 (struct hwrm_cfa_encap_data_vxlan *)&req.encap_data;
615 struct hwrm_vxlan_ipv4_hdr *encap_ipv4 =
616 (struct hwrm_vxlan_ipv4_hdr *)encap->l3;
617 int rc;
618
619 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_ALLOC, -1, -1);
620
621 req.encap_type = CFA_ENCAP_RECORD_ALLOC_REQ_ENCAP_TYPE_VXLAN;
622
623 ether_addr_copy(encap->dst_mac_addr, l2_info->dmac);
624 ether_addr_copy(encap->src_mac_addr, l2_info->smac);
625 if (l2_info->num_vlans) {
626 encap->num_vlan_tags = l2_info->num_vlans;
627 encap->ovlan_tci = l2_info->inner_vlan_tci;
628 encap->ovlan_tpid = l2_info->inner_vlan_tpid;
629 }
630
631 encap_ipv4->ver_hlen = 4 << VXLAN_IPV4_HDR_VER_HLEN_VERSION_SFT;
632 encap_ipv4->ver_hlen |= 5 << VXLAN_IPV4_HDR_VER_HLEN_HEADER_LENGTH_SFT;
633 encap_ipv4->ttl = encap_key->ttl;
634
635 encap_ipv4->dest_ip_addr = encap_key->u.ipv4.dst;
636 encap_ipv4->src_ip_addr = encap_key->u.ipv4.src;
637 encap_ipv4->protocol = IPPROTO_UDP;
638
639 encap->dst_port = encap_key->tp_dst;
640 encap->vni = tunnel_id_to_key32(encap_key->tun_id);
641
642 mutex_lock(&bp->hwrm_cmd_lock);
643 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
644 if (!rc) {
645 resp = bnxt_get_hwrm_resp_addr(bp, &req);
646 *encap_record_handle = resp->encap_record_id;
647 } else {
648 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
649 }
650 mutex_unlock(&bp->hwrm_cmd_lock);
651
652 return rc;
653 }
654
655 static int hwrm_cfa_encap_record_free(struct bnxt *bp,
656 __le32 encap_record_handle)
657 {
658 struct hwrm_cfa_encap_record_free_input req = { 0 };
659 int rc;
660
661 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_FREE, -1, -1);
662 req.encap_record_id = encap_record_handle;
663
664 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
665 if (rc)
666 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
667
668 return rc;
669 }
670
671 static int bnxt_tc_put_l2_node(struct bnxt *bp,
672 struct bnxt_tc_flow_node *flow_node)
673 {
674 struct bnxt_tc_l2_node *l2_node = flow_node->l2_node;
675 struct bnxt_tc_info *tc_info = bp->tc_info;
676 int rc;
677
678
679 list_del(&flow_node->l2_list_node);
680 if (--l2_node->refcount == 0) {
681 rc = rhashtable_remove_fast(&tc_info->l2_table, &l2_node->node,
682 tc_info->l2_ht_params);
683 if (rc)
684 netdev_err(bp->dev,
685 "Error: %s: rhashtable_remove_fast: %d",
686 __func__, rc);
687 kfree_rcu(l2_node, rcu);
688 }
689 return 0;
690 }
691
692 static struct bnxt_tc_l2_node *
693 bnxt_tc_get_l2_node(struct bnxt *bp, struct rhashtable *l2_table,
694 struct rhashtable_params ht_params,
695 struct bnxt_tc_l2_key *l2_key)
696 {
697 struct bnxt_tc_l2_node *l2_node;
698 int rc;
699
700 l2_node = rhashtable_lookup_fast(l2_table, l2_key, ht_params);
701 if (!l2_node) {
702 l2_node = kzalloc(sizeof(*l2_node), GFP_KERNEL);
703 if (!l2_node) {
704 rc = -ENOMEM;
705 return NULL;
706 }
707
708 l2_node->key = *l2_key;
709 rc = rhashtable_insert_fast(l2_table, &l2_node->node,
710 ht_params);
711 if (rc) {
712 kfree_rcu(l2_node, rcu);
713 netdev_err(bp->dev,
714 "Error: %s: rhashtable_insert_fast: %d",
715 __func__, rc);
716 return NULL;
717 }
718 INIT_LIST_HEAD(&l2_node->common_l2_flows);
719 }
720 return l2_node;
721 }
722
723
724
725
726 static int
727 bnxt_tc_get_ref_flow_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
728 struct bnxt_tc_flow_node *flow_node,
729 __le16 *ref_flow_handle)
730 {
731 struct bnxt_tc_info *tc_info = bp->tc_info;
732 struct bnxt_tc_flow_node *ref_flow_node;
733 struct bnxt_tc_l2_node *l2_node;
734
735 l2_node = bnxt_tc_get_l2_node(bp, &tc_info->l2_table,
736 tc_info->l2_ht_params,
737 &flow->l2_key);
738 if (!l2_node)
739 return -1;
740
741
742
743
744 if (l2_node->refcount > 0) {
745 ref_flow_node = list_first_entry(&l2_node->common_l2_flows,
746 struct bnxt_tc_flow_node,
747 l2_list_node);
748 *ref_flow_handle = ref_flow_node->flow_handle;
749 } else {
750 *ref_flow_handle = cpu_to_le16(0xffff);
751 }
752
753
754
755
756
757 flow_node->l2_node = l2_node;
758 list_add(&flow_node->l2_list_node, &l2_node->common_l2_flows);
759 l2_node->refcount++;
760 return 0;
761 }
762
763
764
765
766
767 static bool bnxt_tc_can_offload(struct bnxt *bp, struct bnxt_tc_flow *flow)
768 {
769
770 if ((flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) &&
771 (flow->l4_key.ip_proto != IPPROTO_TCP &&
772 flow->l4_key.ip_proto != IPPROTO_UDP)) {
773 netdev_info(bp->dev, "Cannot offload non-TCP/UDP (%d) ports",
774 flow->l4_key.ip_proto);
775 return false;
776 }
777
778
779 if (bits_set(&flow->l2_key.smac, sizeof(flow->l2_key.smac)) &&
780 !is_exactmatch(flow->l2_mask.smac, sizeof(flow->l2_mask.smac))) {
781 netdev_info(bp->dev, "Wildcard match unsupported for Source MAC\n");
782 return false;
783 }
784 if (bits_set(&flow->l2_key.dmac, sizeof(flow->l2_key.dmac)) &&
785 !is_exactmatch(&flow->l2_mask.dmac, sizeof(flow->l2_mask.dmac))) {
786 netdev_info(bp->dev, "Wildcard match unsupported for Dest MAC\n");
787 return false;
788 }
789
790
791 if (bits_set(&flow->l2_key.inner_vlan_tci,
792 sizeof(flow->l2_key.inner_vlan_tci)) &&
793 !is_vlan_tci_allowed(flow->l2_mask.inner_vlan_tci,
794 flow->l2_key.inner_vlan_tci)) {
795 netdev_info(bp->dev, "Unsupported VLAN TCI\n");
796 return false;
797 }
798 if (bits_set(&flow->l2_key.inner_vlan_tpid,
799 sizeof(flow->l2_key.inner_vlan_tpid)) &&
800 !is_exactmatch(&flow->l2_mask.inner_vlan_tpid,
801 sizeof(flow->l2_mask.inner_vlan_tpid))) {
802 netdev_info(bp->dev, "Wildcard match unsupported for VLAN TPID\n");
803 return false;
804 }
805
806
807 if (!is_exactmatch(&flow->l2_mask.ether_type,
808 sizeof(flow->l2_mask.ether_type))) {
809 netdev_info(bp->dev, "Wildcard match unsupported for Ethertype\n");
810 return false;
811 }
812
813 return true;
814 }
815
816
817
818
819 static int bnxt_tc_put_tunnel_node(struct bnxt *bp,
820 struct rhashtable *tunnel_table,
821 struct rhashtable_params *ht_params,
822 struct bnxt_tc_tunnel_node *tunnel_node)
823 {
824 int rc;
825
826 if (--tunnel_node->refcount == 0) {
827 rc = rhashtable_remove_fast(tunnel_table, &tunnel_node->node,
828 *ht_params);
829 if (rc) {
830 netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc);
831 rc = -1;
832 }
833 kfree_rcu(tunnel_node, rcu);
834 return rc;
835 } else {
836 return tunnel_node->refcount;
837 }
838 }
839
840
841
842
843 static struct bnxt_tc_tunnel_node *
844 bnxt_tc_get_tunnel_node(struct bnxt *bp, struct rhashtable *tunnel_table,
845 struct rhashtable_params *ht_params,
846 struct ip_tunnel_key *tun_key)
847 {
848 struct bnxt_tc_tunnel_node *tunnel_node;
849 int rc;
850
851 tunnel_node = rhashtable_lookup_fast(tunnel_table, tun_key, *ht_params);
852 if (!tunnel_node) {
853 tunnel_node = kzalloc(sizeof(*tunnel_node), GFP_KERNEL);
854 if (!tunnel_node) {
855 rc = -ENOMEM;
856 goto err;
857 }
858
859 tunnel_node->key = *tun_key;
860 tunnel_node->tunnel_handle = INVALID_TUNNEL_HANDLE;
861 rc = rhashtable_insert_fast(tunnel_table, &tunnel_node->node,
862 *ht_params);
863 if (rc) {
864 kfree_rcu(tunnel_node, rcu);
865 goto err;
866 }
867 }
868 tunnel_node->refcount++;
869 return tunnel_node;
870 err:
871 netdev_info(bp->dev, "error rc=%d", rc);
872 return NULL;
873 }
874
875 static int bnxt_tc_get_ref_decap_handle(struct bnxt *bp,
876 struct bnxt_tc_flow *flow,
877 struct bnxt_tc_l2_key *l2_key,
878 struct bnxt_tc_flow_node *flow_node,
879 __le32 *ref_decap_handle)
880 {
881 struct bnxt_tc_info *tc_info = bp->tc_info;
882 struct bnxt_tc_flow_node *ref_flow_node;
883 struct bnxt_tc_l2_node *decap_l2_node;
884
885 decap_l2_node = bnxt_tc_get_l2_node(bp, &tc_info->decap_l2_table,
886 tc_info->decap_l2_ht_params,
887 l2_key);
888 if (!decap_l2_node)
889 return -1;
890
891
892
893
894 if (decap_l2_node->refcount > 0) {
895 ref_flow_node =
896 list_first_entry(&decap_l2_node->common_l2_flows,
897 struct bnxt_tc_flow_node,
898 decap_l2_list_node);
899 *ref_decap_handle = ref_flow_node->decap_node->tunnel_handle;
900 } else {
901 *ref_decap_handle = INVALID_TUNNEL_HANDLE;
902 }
903
904
905
906
907
908 flow_node->decap_l2_node = decap_l2_node;
909 list_add(&flow_node->decap_l2_list_node,
910 &decap_l2_node->common_l2_flows);
911 decap_l2_node->refcount++;
912 return 0;
913 }
914
915 static void bnxt_tc_put_decap_l2_node(struct bnxt *bp,
916 struct bnxt_tc_flow_node *flow_node)
917 {
918 struct bnxt_tc_l2_node *decap_l2_node = flow_node->decap_l2_node;
919 struct bnxt_tc_info *tc_info = bp->tc_info;
920 int rc;
921
922
923 list_del(&flow_node->decap_l2_list_node);
924 if (--decap_l2_node->refcount == 0) {
925 rc = rhashtable_remove_fast(&tc_info->decap_l2_table,
926 &decap_l2_node->node,
927 tc_info->decap_l2_ht_params);
928 if (rc)
929 netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc);
930 kfree_rcu(decap_l2_node, rcu);
931 }
932 }
933
934 static void bnxt_tc_put_decap_handle(struct bnxt *bp,
935 struct bnxt_tc_flow_node *flow_node)
936 {
937 __le32 decap_handle = flow_node->decap_node->tunnel_handle;
938 struct bnxt_tc_info *tc_info = bp->tc_info;
939 int rc;
940
941 if (flow_node->decap_l2_node)
942 bnxt_tc_put_decap_l2_node(bp, flow_node);
943
944 rc = bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table,
945 &tc_info->decap_ht_params,
946 flow_node->decap_node);
947 if (!rc && decap_handle != INVALID_TUNNEL_HANDLE)
948 hwrm_cfa_decap_filter_free(bp, decap_handle);
949 }
950
951 static int bnxt_tc_resolve_tunnel_hdrs(struct bnxt *bp,
952 struct ip_tunnel_key *tun_key,
953 struct bnxt_tc_l2_key *l2_info)
954 {
955 #ifdef CONFIG_INET
956 struct net_device *real_dst_dev = bp->dev;
957 struct flowi4 flow = { {0} };
958 struct net_device *dst_dev;
959 struct neighbour *nbr;
960 struct rtable *rt;
961 int rc;
962
963 flow.flowi4_proto = IPPROTO_UDP;
964 flow.fl4_dport = tun_key->tp_dst;
965 flow.daddr = tun_key->u.ipv4.dst;
966
967 rt = ip_route_output_key(dev_net(real_dst_dev), &flow);
968 if (IS_ERR(rt)) {
969 netdev_info(bp->dev, "no route to %pI4b", &flow.daddr);
970 return -EOPNOTSUPP;
971 }
972
973
974
975
976 dst_dev = rt->dst.dev;
977 if (is_vlan_dev(dst_dev)) {
978 #if IS_ENABLED(CONFIG_VLAN_8021Q)
979 struct vlan_dev_priv *vlan = vlan_dev_priv(dst_dev);
980
981 if (vlan->real_dev != real_dst_dev) {
982 netdev_info(bp->dev,
983 "dst_dev(%s) doesn't use PF-if(%s)",
984 netdev_name(dst_dev),
985 netdev_name(real_dst_dev));
986 rc = -EOPNOTSUPP;
987 goto put_rt;
988 }
989 l2_info->inner_vlan_tci = htons(vlan->vlan_id);
990 l2_info->inner_vlan_tpid = vlan->vlan_proto;
991 l2_info->num_vlans = 1;
992 #endif
993 } else if (dst_dev != real_dst_dev) {
994 netdev_info(bp->dev,
995 "dst_dev(%s) for %pI4b is not PF-if(%s)",
996 netdev_name(dst_dev), &flow.daddr,
997 netdev_name(real_dst_dev));
998 rc = -EOPNOTSUPP;
999 goto put_rt;
1000 }
1001
1002 nbr = dst_neigh_lookup(&rt->dst, &flow.daddr);
1003 if (!nbr) {
1004 netdev_info(bp->dev, "can't lookup neighbor for %pI4b",
1005 &flow.daddr);
1006 rc = -EOPNOTSUPP;
1007 goto put_rt;
1008 }
1009
1010 tun_key->u.ipv4.src = flow.saddr;
1011 tun_key->ttl = ip4_dst_hoplimit(&rt->dst);
1012 neigh_ha_snapshot(l2_info->dmac, nbr, dst_dev);
1013 ether_addr_copy(l2_info->smac, dst_dev->dev_addr);
1014 neigh_release(nbr);
1015 ip_rt_put(rt);
1016
1017 return 0;
1018 put_rt:
1019 ip_rt_put(rt);
1020 return rc;
1021 #else
1022 return -EOPNOTSUPP;
1023 #endif
1024 }
1025
1026 static int bnxt_tc_get_decap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
1027 struct bnxt_tc_flow_node *flow_node,
1028 __le32 *decap_filter_handle)
1029 {
1030 struct ip_tunnel_key *decap_key = &flow->tun_key;
1031 struct bnxt_tc_info *tc_info = bp->tc_info;
1032 struct bnxt_tc_l2_key l2_info = { {0} };
1033 struct bnxt_tc_tunnel_node *decap_node;
1034 struct ip_tunnel_key tun_key = { 0 };
1035 struct bnxt_tc_l2_key *decap_l2_info;
1036 __le32 ref_decap_handle;
1037 int rc;
1038
1039
1040
1041
1042
1043
1044 decap_key->tp_src = 0;
1045 decap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->decap_table,
1046 &tc_info->decap_ht_params,
1047 decap_key);
1048 if (!decap_node)
1049 return -ENOMEM;
1050
1051 flow_node->decap_node = decap_node;
1052
1053 if (decap_node->tunnel_handle != INVALID_TUNNEL_HANDLE)
1054 goto done;
1055
1056
1057
1058
1059
1060 tun_key.u.ipv4.dst = flow->tun_key.u.ipv4.src;
1061 tun_key.tp_dst = flow->tun_key.tp_dst;
1062 rc = bnxt_tc_resolve_tunnel_hdrs(bp, &tun_key, &l2_info);
1063 if (rc)
1064 goto put_decap;
1065
1066 decap_l2_info = &decap_node->l2_info;
1067
1068 ether_addr_copy(decap_l2_info->dmac, l2_info.smac);
1069 if (l2_info.num_vlans) {
1070 decap_l2_info->num_vlans = l2_info.num_vlans;
1071 decap_l2_info->inner_vlan_tpid = l2_info.inner_vlan_tpid;
1072 decap_l2_info->inner_vlan_tci = l2_info.inner_vlan_tci;
1073 }
1074 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS;
1075
1076
1077
1078
1079
1080
1081 rc = bnxt_tc_get_ref_decap_handle(bp, flow, decap_l2_info, flow_node,
1082 &ref_decap_handle);
1083 if (rc)
1084 goto put_decap;
1085
1086
1087 rc = hwrm_cfa_decap_filter_alloc(bp, flow, decap_l2_info,
1088 ref_decap_handle,
1089 &decap_node->tunnel_handle);
1090 if (rc)
1091 goto put_decap_l2;
1092
1093 done:
1094 *decap_filter_handle = decap_node->tunnel_handle;
1095 return 0;
1096
1097 put_decap_l2:
1098 bnxt_tc_put_decap_l2_node(bp, flow_node);
1099 put_decap:
1100 bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table,
1101 &tc_info->decap_ht_params,
1102 flow_node->decap_node);
1103 return rc;
1104 }
1105
1106 static void bnxt_tc_put_encap_handle(struct bnxt *bp,
1107 struct bnxt_tc_tunnel_node *encap_node)
1108 {
1109 __le32 encap_handle = encap_node->tunnel_handle;
1110 struct bnxt_tc_info *tc_info = bp->tc_info;
1111 int rc;
1112
1113 rc = bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table,
1114 &tc_info->encap_ht_params, encap_node);
1115 if (!rc && encap_handle != INVALID_TUNNEL_HANDLE)
1116 hwrm_cfa_encap_record_free(bp, encap_handle);
1117 }
1118
1119
1120
1121
1122
1123
1124 static int bnxt_tc_get_encap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
1125 struct bnxt_tc_flow_node *flow_node,
1126 __le32 *encap_handle)
1127 {
1128 struct ip_tunnel_key *encap_key = &flow->actions.tun_encap_key;
1129 struct bnxt_tc_info *tc_info = bp->tc_info;
1130 struct bnxt_tc_tunnel_node *encap_node;
1131 int rc;
1132
1133
1134
1135
1136
1137 encap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->encap_table,
1138 &tc_info->encap_ht_params,
1139 encap_key);
1140 if (!encap_node)
1141 return -ENOMEM;
1142
1143 flow_node->encap_node = encap_node;
1144
1145 if (encap_node->tunnel_handle != INVALID_TUNNEL_HANDLE)
1146 goto done;
1147
1148 rc = bnxt_tc_resolve_tunnel_hdrs(bp, encap_key, &encap_node->l2_info);
1149 if (rc)
1150 goto put_encap;
1151
1152
1153 rc = hwrm_cfa_encap_record_alloc(bp, encap_key, &encap_node->l2_info,
1154 &encap_node->tunnel_handle);
1155 if (rc)
1156 goto put_encap;
1157
1158 done:
1159 *encap_handle = encap_node->tunnel_handle;
1160 return 0;
1161
1162 put_encap:
1163 bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table,
1164 &tc_info->encap_ht_params, encap_node);
1165 return rc;
1166 }
1167
1168 static void bnxt_tc_put_tunnel_handle(struct bnxt *bp,
1169 struct bnxt_tc_flow *flow,
1170 struct bnxt_tc_flow_node *flow_node)
1171 {
1172 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1173 bnxt_tc_put_decap_handle(bp, flow_node);
1174 else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP)
1175 bnxt_tc_put_encap_handle(bp, flow_node->encap_node);
1176 }
1177
1178 static int bnxt_tc_get_tunnel_handle(struct bnxt *bp,
1179 struct bnxt_tc_flow *flow,
1180 struct bnxt_tc_flow_node *flow_node,
1181 __le32 *tunnel_handle)
1182 {
1183 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1184 return bnxt_tc_get_decap_handle(bp, flow, flow_node,
1185 tunnel_handle);
1186 else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP)
1187 return bnxt_tc_get_encap_handle(bp, flow, flow_node,
1188 tunnel_handle);
1189 else
1190 return 0;
1191 }
1192 static int __bnxt_tc_del_flow(struct bnxt *bp,
1193 struct bnxt_tc_flow_node *flow_node)
1194 {
1195 struct bnxt_tc_info *tc_info = bp->tc_info;
1196 int rc;
1197
1198
1199 bnxt_hwrm_cfa_flow_free(bp, flow_node);
1200
1201 mutex_lock(&tc_info->lock);
1202
1203
1204 bnxt_tc_put_tunnel_handle(bp, &flow_node->flow, flow_node);
1205
1206
1207 bnxt_tc_put_l2_node(bp, flow_node);
1208
1209 mutex_unlock(&tc_info->lock);
1210
1211 rc = rhashtable_remove_fast(&tc_info->flow_table, &flow_node->node,
1212 tc_info->flow_ht_params);
1213 if (rc)
1214 netdev_err(bp->dev, "Error: %s: rhashtable_remove_fast rc=%d",
1215 __func__, rc);
1216
1217 kfree_rcu(flow_node, rcu);
1218 return 0;
1219 }
1220
1221 static void bnxt_tc_set_flow_dir(struct bnxt *bp, struct bnxt_tc_flow *flow,
1222 u16 src_fid)
1223 {
1224 flow->l2_key.dir = (bp->pf.fw_fid == src_fid) ? BNXT_DIR_RX : BNXT_DIR_TX;
1225 }
1226
1227 static void bnxt_tc_set_src_fid(struct bnxt *bp, struct bnxt_tc_flow *flow,
1228 u16 src_fid)
1229 {
1230 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1231 flow->src_fid = bp->pf.fw_fid;
1232 else
1233 flow->src_fid = src_fid;
1234 }
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249 static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid,
1250 struct flow_cls_offload *tc_flow_cmd)
1251 {
1252 struct bnxt_tc_flow_node *new_node, *old_node;
1253 struct bnxt_tc_info *tc_info = bp->tc_info;
1254 struct bnxt_tc_flow *flow;
1255 __le32 tunnel_handle = 0;
1256 __le16 ref_flow_handle;
1257 int rc;
1258
1259
1260 new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
1261 if (!new_node) {
1262 rc = -ENOMEM;
1263 goto done;
1264 }
1265 new_node->cookie = tc_flow_cmd->cookie;
1266 flow = &new_node->flow;
1267
1268 rc = bnxt_tc_parse_flow(bp, tc_flow_cmd, flow);
1269 if (rc)
1270 goto free_node;
1271
1272 bnxt_tc_set_src_fid(bp, flow, src_fid);
1273 bnxt_tc_set_flow_dir(bp, flow, flow->src_fid);
1274
1275 if (!bnxt_tc_can_offload(bp, flow)) {
1276 rc = -EOPNOTSUPP;
1277 goto free_node;
1278 }
1279
1280
1281 old_node = rhashtable_lookup_fast(&tc_info->flow_table,
1282 &tc_flow_cmd->cookie,
1283 tc_info->flow_ht_params);
1284 if (old_node)
1285 __bnxt_tc_del_flow(bp, old_node);
1286
1287
1288
1289
1290 mutex_lock(&tc_info->lock);
1291 rc = bnxt_tc_get_ref_flow_handle(bp, flow, new_node, &ref_flow_handle);
1292 if (rc)
1293 goto unlock;
1294
1295
1296 rc = bnxt_tc_get_tunnel_handle(bp, flow, new_node, &tunnel_handle);
1297 if (rc)
1298 goto put_l2;
1299
1300
1301 rc = bnxt_hwrm_cfa_flow_alloc(bp, flow, ref_flow_handle,
1302 tunnel_handle, new_node);
1303 if (rc)
1304 goto put_tunnel;
1305
1306 flow->lastused = jiffies;
1307 spin_lock_init(&flow->stats_lock);
1308
1309 rc = rhashtable_insert_fast(&tc_info->flow_table, &new_node->node,
1310 tc_info->flow_ht_params);
1311 if (rc)
1312 goto hwrm_flow_free;
1313
1314 mutex_unlock(&tc_info->lock);
1315 return 0;
1316
1317 hwrm_flow_free:
1318 bnxt_hwrm_cfa_flow_free(bp, new_node);
1319 put_tunnel:
1320 bnxt_tc_put_tunnel_handle(bp, flow, new_node);
1321 put_l2:
1322 bnxt_tc_put_l2_node(bp, new_node);
1323 unlock:
1324 mutex_unlock(&tc_info->lock);
1325 free_node:
1326 kfree_rcu(new_node, rcu);
1327 done:
1328 netdev_err(bp->dev, "Error: %s: cookie=0x%lx error=%d",
1329 __func__, tc_flow_cmd->cookie, rc);
1330 return rc;
1331 }
1332
1333 static int bnxt_tc_del_flow(struct bnxt *bp,
1334 struct flow_cls_offload *tc_flow_cmd)
1335 {
1336 struct bnxt_tc_info *tc_info = bp->tc_info;
1337 struct bnxt_tc_flow_node *flow_node;
1338
1339 flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
1340 &tc_flow_cmd->cookie,
1341 tc_info->flow_ht_params);
1342 if (!flow_node)
1343 return -EINVAL;
1344
1345 return __bnxt_tc_del_flow(bp, flow_node);
1346 }
1347
1348 static int bnxt_tc_get_flow_stats(struct bnxt *bp,
1349 struct flow_cls_offload *tc_flow_cmd)
1350 {
1351 struct bnxt_tc_flow_stats stats, *curr_stats, *prev_stats;
1352 struct bnxt_tc_info *tc_info = bp->tc_info;
1353 struct bnxt_tc_flow_node *flow_node;
1354 struct bnxt_tc_flow *flow;
1355 unsigned long lastused;
1356
1357 flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
1358 &tc_flow_cmd->cookie,
1359 tc_info->flow_ht_params);
1360 if (!flow_node)
1361 return -1;
1362
1363 flow = &flow_node->flow;
1364 curr_stats = &flow->stats;
1365 prev_stats = &flow->prev_stats;
1366
1367 spin_lock(&flow->stats_lock);
1368 stats.packets = curr_stats->packets - prev_stats->packets;
1369 stats.bytes = curr_stats->bytes - prev_stats->bytes;
1370 *prev_stats = *curr_stats;
1371 lastused = flow->lastused;
1372 spin_unlock(&flow->stats_lock);
1373
1374 flow_stats_update(&tc_flow_cmd->stats, stats.bytes, stats.packets,
1375 lastused);
1376 return 0;
1377 }
1378
1379 static void bnxt_fill_cfa_stats_req(struct bnxt *bp,
1380 struct bnxt_tc_flow_node *flow_node,
1381 __le16 *flow_handle, __le32 *flow_id)
1382 {
1383 u16 handle;
1384
1385 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) {
1386 *flow_id = flow_node->flow_id;
1387
1388
1389
1390
1391
1392
1393 if (flow_node->flow.l2_key.dir == BNXT_DIR_RX)
1394 handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_DIR_RX |
1395 CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK;
1396 else
1397 handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK;
1398
1399 *flow_handle = cpu_to_le16(handle);
1400 } else {
1401 *flow_handle = flow_node->flow_handle;
1402 }
1403 }
1404
1405 static int
1406 bnxt_hwrm_cfa_flow_stats_get(struct bnxt *bp, int num_flows,
1407 struct bnxt_tc_stats_batch stats_batch[])
1408 {
1409 struct hwrm_cfa_flow_stats_input req = { 0 };
1410 struct hwrm_cfa_flow_stats_output *resp;
1411 __le16 *req_flow_handles = &req.flow_handle_0;
1412 __le32 *req_flow_ids = &req.flow_id_0;
1413 int rc, i;
1414
1415 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_STATS, -1, -1);
1416 req.num_flows = cpu_to_le16(num_flows);
1417 for (i = 0; i < num_flows; i++) {
1418 struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node;
1419
1420 bnxt_fill_cfa_stats_req(bp, flow_node,
1421 &req_flow_handles[i], &req_flow_ids[i]);
1422 }
1423
1424 mutex_lock(&bp->hwrm_cmd_lock);
1425 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
1426 if (!rc) {
1427 __le64 *resp_packets;
1428 __le64 *resp_bytes;
1429
1430 resp = bnxt_get_hwrm_resp_addr(bp, &req);
1431 resp_packets = &resp->packet_0;
1432 resp_bytes = &resp->byte_0;
1433
1434 for (i = 0; i < num_flows; i++) {
1435 stats_batch[i].hw_stats.packets =
1436 le64_to_cpu(resp_packets[i]);
1437 stats_batch[i].hw_stats.bytes =
1438 le64_to_cpu(resp_bytes[i]);
1439 }
1440 } else {
1441 netdev_info(bp->dev, "error rc=%d", rc);
1442 }
1443 mutex_unlock(&bp->hwrm_cmd_lock);
1444
1445 return rc;
1446 }
1447
1448
1449
1450
1451
1452 static void accumulate_val(u64 *accum, u64 val, u64 mask)
1453 {
1454 #define low_bits(x, mask) ((x) & (mask))
1455 #define high_bits(x, mask) ((x) & ~(mask))
1456 bool wrapped = val < low_bits(*accum, mask);
1457
1458 *accum = high_bits(*accum, mask) + val;
1459 if (wrapped)
1460 *accum += (mask + 1);
1461 }
1462
1463
1464
1465
1466 static void bnxt_flow_stats_accum(struct bnxt_tc_info *tc_info,
1467 struct bnxt_tc_flow_stats *acc_stats,
1468 struct bnxt_tc_flow_stats *hw_stats)
1469 {
1470 accumulate_val(&acc_stats->bytes, hw_stats->bytes, tc_info->bytes_mask);
1471 accumulate_val(&acc_stats->packets, hw_stats->packets,
1472 tc_info->packets_mask);
1473 }
1474
1475 static int
1476 bnxt_tc_flow_stats_batch_update(struct bnxt *bp, int num_flows,
1477 struct bnxt_tc_stats_batch stats_batch[])
1478 {
1479 struct bnxt_tc_info *tc_info = bp->tc_info;
1480 int rc, i;
1481
1482 rc = bnxt_hwrm_cfa_flow_stats_get(bp, num_flows, stats_batch);
1483 if (rc)
1484 return rc;
1485
1486 for (i = 0; i < num_flows; i++) {
1487 struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node;
1488 struct bnxt_tc_flow *flow = &flow_node->flow;
1489
1490 spin_lock(&flow->stats_lock);
1491 bnxt_flow_stats_accum(tc_info, &flow->stats,
1492 &stats_batch[i].hw_stats);
1493 if (flow->stats.packets != flow->prev_stats.packets)
1494 flow->lastused = jiffies;
1495 spin_unlock(&flow->stats_lock);
1496 }
1497
1498 return 0;
1499 }
1500
1501 static int
1502 bnxt_tc_flow_stats_batch_prep(struct bnxt *bp,
1503 struct bnxt_tc_stats_batch stats_batch[],
1504 int *num_flows)
1505 {
1506 struct bnxt_tc_info *tc_info = bp->tc_info;
1507 struct rhashtable_iter *iter = &tc_info->iter;
1508 void *flow_node;
1509 int rc, i;
1510
1511 rhashtable_walk_start(iter);
1512
1513 rc = 0;
1514 for (i = 0; i < BNXT_FLOW_STATS_BATCH_MAX; i++) {
1515 flow_node = rhashtable_walk_next(iter);
1516 if (IS_ERR(flow_node)) {
1517 i = 0;
1518 if (PTR_ERR(flow_node) == -EAGAIN) {
1519 continue;
1520 } else {
1521 rc = PTR_ERR(flow_node);
1522 goto done;
1523 }
1524 }
1525
1526
1527 if (!flow_node)
1528 goto done;
1529
1530 stats_batch[i].flow_node = flow_node;
1531 }
1532 done:
1533 rhashtable_walk_stop(iter);
1534 *num_flows = i;
1535 return rc;
1536 }
1537
1538 void bnxt_tc_flow_stats_work(struct bnxt *bp)
1539 {
1540 struct bnxt_tc_info *tc_info = bp->tc_info;
1541 int num_flows, rc;
1542
1543 num_flows = atomic_read(&tc_info->flow_table.nelems);
1544 if (!num_flows)
1545 return;
1546
1547 rhashtable_walk_enter(&tc_info->flow_table, &tc_info->iter);
1548
1549 for (;;) {
1550 rc = bnxt_tc_flow_stats_batch_prep(bp, tc_info->stats_batch,
1551 &num_flows);
1552 if (rc) {
1553 if (rc == -EAGAIN)
1554 continue;
1555 break;
1556 }
1557
1558 if (!num_flows)
1559 break;
1560
1561 bnxt_tc_flow_stats_batch_update(bp, num_flows,
1562 tc_info->stats_batch);
1563 }
1564
1565 rhashtable_walk_exit(&tc_info->iter);
1566 }
1567
1568 int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
1569 struct flow_cls_offload *cls_flower)
1570 {
1571 switch (cls_flower->command) {
1572 case FLOW_CLS_REPLACE:
1573 return bnxt_tc_add_flow(bp, src_fid, cls_flower);
1574 case FLOW_CLS_DESTROY:
1575 return bnxt_tc_del_flow(bp, cls_flower);
1576 case FLOW_CLS_STATS:
1577 return bnxt_tc_get_flow_stats(bp, cls_flower);
1578 default:
1579 return -EOPNOTSUPP;
1580 }
1581 }
1582
1583 static const struct rhashtable_params bnxt_tc_flow_ht_params = {
1584 .head_offset = offsetof(struct bnxt_tc_flow_node, node),
1585 .key_offset = offsetof(struct bnxt_tc_flow_node, cookie),
1586 .key_len = sizeof(((struct bnxt_tc_flow_node *)0)->cookie),
1587 .automatic_shrinking = true
1588 };
1589
1590 static const struct rhashtable_params bnxt_tc_l2_ht_params = {
1591 .head_offset = offsetof(struct bnxt_tc_l2_node, node),
1592 .key_offset = offsetof(struct bnxt_tc_l2_node, key),
1593 .key_len = BNXT_TC_L2_KEY_LEN,
1594 .automatic_shrinking = true
1595 };
1596
1597 static const struct rhashtable_params bnxt_tc_decap_l2_ht_params = {
1598 .head_offset = offsetof(struct bnxt_tc_l2_node, node),
1599 .key_offset = offsetof(struct bnxt_tc_l2_node, key),
1600 .key_len = BNXT_TC_L2_KEY_LEN,
1601 .automatic_shrinking = true
1602 };
1603
1604 static const struct rhashtable_params bnxt_tc_tunnel_ht_params = {
1605 .head_offset = offsetof(struct bnxt_tc_tunnel_node, node),
1606 .key_offset = offsetof(struct bnxt_tc_tunnel_node, key),
1607 .key_len = sizeof(struct ip_tunnel_key),
1608 .automatic_shrinking = true
1609 };
1610
1611
1612 #define mask(width) ((u64)~0 >> (64 - (width)))
1613
1614 int bnxt_init_tc(struct bnxt *bp)
1615 {
1616 struct bnxt_tc_info *tc_info;
1617 int rc;
1618
1619 if (bp->hwrm_spec_code < 0x10803) {
1620 netdev_warn(bp->dev,
1621 "Firmware does not support TC flower offload.\n");
1622 return -ENOTSUPP;
1623 }
1624
1625 tc_info = kzalloc(sizeof(*tc_info), GFP_KERNEL);
1626 if (!tc_info)
1627 return -ENOMEM;
1628 mutex_init(&tc_info->lock);
1629
1630
1631 tc_info->bytes_mask = mask(36);
1632 tc_info->packets_mask = mask(28);
1633
1634 tc_info->flow_ht_params = bnxt_tc_flow_ht_params;
1635 rc = rhashtable_init(&tc_info->flow_table, &tc_info->flow_ht_params);
1636 if (rc)
1637 goto free_tc_info;
1638
1639 tc_info->l2_ht_params = bnxt_tc_l2_ht_params;
1640 rc = rhashtable_init(&tc_info->l2_table, &tc_info->l2_ht_params);
1641 if (rc)
1642 goto destroy_flow_table;
1643
1644 tc_info->decap_l2_ht_params = bnxt_tc_decap_l2_ht_params;
1645 rc = rhashtable_init(&tc_info->decap_l2_table,
1646 &tc_info->decap_l2_ht_params);
1647 if (rc)
1648 goto destroy_l2_table;
1649
1650 tc_info->decap_ht_params = bnxt_tc_tunnel_ht_params;
1651 rc = rhashtable_init(&tc_info->decap_table,
1652 &tc_info->decap_ht_params);
1653 if (rc)
1654 goto destroy_decap_l2_table;
1655
1656 tc_info->encap_ht_params = bnxt_tc_tunnel_ht_params;
1657 rc = rhashtable_init(&tc_info->encap_table,
1658 &tc_info->encap_ht_params);
1659 if (rc)
1660 goto destroy_decap_table;
1661
1662 tc_info->enabled = true;
1663 bp->dev->hw_features |= NETIF_F_HW_TC;
1664 bp->dev->features |= NETIF_F_HW_TC;
1665 bp->tc_info = tc_info;
1666 return 0;
1667
1668 destroy_decap_table:
1669 rhashtable_destroy(&tc_info->decap_table);
1670 destroy_decap_l2_table:
1671 rhashtable_destroy(&tc_info->decap_l2_table);
1672 destroy_l2_table:
1673 rhashtable_destroy(&tc_info->l2_table);
1674 destroy_flow_table:
1675 rhashtable_destroy(&tc_info->flow_table);
1676 free_tc_info:
1677 kfree(tc_info);
1678 return rc;
1679 }
1680
1681 void bnxt_shutdown_tc(struct bnxt *bp)
1682 {
1683 struct bnxt_tc_info *tc_info = bp->tc_info;
1684
1685 if (!bnxt_tc_flower_enabled(bp))
1686 return;
1687
1688 rhashtable_destroy(&tc_info->flow_table);
1689 rhashtable_destroy(&tc_info->l2_table);
1690 rhashtable_destroy(&tc_info->decap_l2_table);
1691 rhashtable_destroy(&tc_info->decap_table);
1692 rhashtable_destroy(&tc_info->encap_table);
1693 kfree(tc_info);
1694 bp->tc_info = NULL;
1695 }