]> git.ipfire.org Git - thirdparty/linux.git/blob - drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c
projects / thirdparty / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
bnxt_en: Support for 64-bit flow handle.
[thirdparty/linux.git] / drivers / net / ethernet / broadcom / bnxt / bnxt_tc.c
1 /* Broadcom NetXtreme-C/E network driver.
2 *
3 * Copyright (c) 2017 Broadcom Limited
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation.
8 */
9
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 /* Return the dst fid of the func for flow forwarding
40 * For PFs: src_fid is the fid of the PF
41 * For VF-reps: src_fid the fid of the VF
42 */
43 static u16 bnxt_flow_get_dst_fid(struct bnxt *pf_bp, struct net_device *dev)
44 {
45 struct bnxt *bp;
46
47 /* check if dev belongs to the same switch */
48 if (!switchdev_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 /* Is dev a VF-rep? */
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 tc_action *tc_act)
65 {
66 struct net_device *dev = tcf_mirred_dev(tc_act);
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 tc_action *tc_act)
81 {
82 switch (tcf_vlan_action(tc_act)) {
83 case TCA_VLAN_ACT_POP:
84 actions->flags |= BNXT_TC_ACTION_FLAG_POP_VLAN;
85 break;
86 case TCA_VLAN_ACT_PUSH:
87 actions->flags |= BNXT_TC_ACTION_FLAG_PUSH_VLAN;
88 actions->push_vlan_tci = htons(tcf_vlan_push_vid(tc_act));
89 actions->push_vlan_tpid = tcf_vlan_push_proto(tc_act);
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 tc_action *tc_act)
100 {
101 struct ip_tunnel_info *tun_info = tcf_tunnel_info(tc_act);
102 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 tcf_exts *tc_exts)
117 {
118 const struct tc_action *tc_act;
119 int i, rc;
120
121 if (!tcf_exts_has_actions(tc_exts)) {
122 netdev_info(bp->dev, "no actions");
123 return -EINVAL;
124 }
125
126 tcf_exts_for_each_action(i, tc_act, tc_exts) {
127 /* Drop action */
128 if (is_tcf_gact_shot(tc_act)) {
129 actions->flags |= BNXT_TC_ACTION_FLAG_DROP;
130 return 0; /* don't bother with other actions */
131 }
132
133 /* Redirect action */
134 if (is_tcf_mirred_egress_redirect(tc_act)) {
135 rc = bnxt_tc_parse_redir(bp, actions, tc_act);
136 if (rc)
137 return rc;
138 continue;
139 }
140
141 /* Push/pop VLAN */
142 if (is_tcf_vlan(tc_act)) {
143 rc = bnxt_tc_parse_vlan(bp, actions, tc_act);
144 if (rc)
145 return rc;
146 continue;
147 }
148
149 /* Tunnel encap */
150 if (is_tcf_tunnel_set(tc_act)) {
151 rc = bnxt_tc_parse_tunnel_set(bp, actions, tc_act);
152 if (rc)
153 return rc;
154 continue;
155 }
156
157 /* Tunnel decap */
158 if (is_tcf_tunnel_release(tc_act)) {
159 actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_DECAP;
160 continue;
161 }
162 }
163
164 if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
165 if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
166 /* dst_fid is PF's fid */
167 actions->dst_fid = bp->pf.fw_fid;
168 } else {
169 /* find the FID from dst_dev */
170 actions->dst_fid =
171 bnxt_flow_get_dst_fid(bp, actions->dst_dev);
172 if (actions->dst_fid == BNXT_FID_INVALID)
173 return -EINVAL;
174 }
175 }
176
177 return 0;
178 }
179
180 #define GET_KEY(flow_cmd, key_type) \
181 skb_flow_dissector_target((flow_cmd)->dissector, key_type,\
182 (flow_cmd)->key)
183 #define GET_MASK(flow_cmd, key_type) \
184 skb_flow_dissector_target((flow_cmd)->dissector, key_type,\
185 (flow_cmd)->mask)
186
187 static int bnxt_tc_parse_flow(struct bnxt *bp,
188 struct tc_cls_flower_offload *tc_flow_cmd,
189 struct bnxt_tc_flow *flow)
190 {
191 struct flow_dissector *dissector = tc_flow_cmd->dissector;
192
193 /* KEY_CONTROL and KEY_BASIC are needed for forming a meaningful key */
194 if ((dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_CONTROL)) == 0 ||
195 (dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_BASIC)) == 0) {
196 netdev_info(bp->dev, "cannot form TC key: used_keys = 0x%x",
197 dissector->used_keys);
198 return -EOPNOTSUPP;
199 }
200
201 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_BASIC)) {
202 struct flow_dissector_key_basic *key =
203 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_BASIC);
204 struct flow_dissector_key_basic *mask =
205 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_BASIC);
206
207 flow->l2_key.ether_type = key->n_proto;
208 flow->l2_mask.ether_type = mask->n_proto;
209
210 if (key->n_proto == htons(ETH_P_IP) ||
211 key->n_proto == htons(ETH_P_IPV6)) {
212 flow->l4_key.ip_proto = key->ip_proto;
213 flow->l4_mask.ip_proto = mask->ip_proto;
214 }
215 }
216
217 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
218 struct flow_dissector_key_eth_addrs *key =
219 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ETH_ADDRS);
220 struct flow_dissector_key_eth_addrs *mask =
221 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_ETH_ADDRS);
222
223 flow->flags |= BNXT_TC_FLOW_FLAGS_ETH_ADDRS;
224 ether_addr_copy(flow->l2_key.dmac, key->dst);
225 ether_addr_copy(flow->l2_mask.dmac, mask->dst);
226 ether_addr_copy(flow->l2_key.smac, key->src);
227 ether_addr_copy(flow->l2_mask.smac, mask->src);
228 }
229
230 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_VLAN)) {
231 struct flow_dissector_key_vlan *key =
232 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_VLAN);
233 struct flow_dissector_key_vlan *mask =
234 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_VLAN);
235
236 flow->l2_key.inner_vlan_tci =
237 cpu_to_be16(VLAN_TCI(key->vlan_id, key->vlan_priority));
238 flow->l2_mask.inner_vlan_tci =
239 cpu_to_be16((VLAN_TCI(mask->vlan_id, mask->vlan_priority)));
240 flow->l2_key.inner_vlan_tpid = htons(ETH_P_8021Q);
241 flow->l2_mask.inner_vlan_tpid = htons(0xffff);
242 flow->l2_key.num_vlans = 1;
243 }
244
245 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
246 struct flow_dissector_key_ipv4_addrs *key =
247 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_IPV4_ADDRS);
248 struct flow_dissector_key_ipv4_addrs *mask =
249 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_IPV4_ADDRS);
250
251 flow->flags |= BNXT_TC_FLOW_FLAGS_IPV4_ADDRS;
252 flow->l3_key.ipv4.daddr.s_addr = key->dst;
253 flow->l3_mask.ipv4.daddr.s_addr = mask->dst;
254 flow->l3_key.ipv4.saddr.s_addr = key->src;
255 flow->l3_mask.ipv4.saddr.s_addr = mask->src;
256 } else if (dissector_uses_key(dissector,
257 FLOW_DISSECTOR_KEY_IPV6_ADDRS)) {
258 struct flow_dissector_key_ipv6_addrs *key =
259 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_IPV6_ADDRS);
260 struct flow_dissector_key_ipv6_addrs *mask =
261 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_IPV6_ADDRS);
262
263 flow->flags |= BNXT_TC_FLOW_FLAGS_IPV6_ADDRS;
264 flow->l3_key.ipv6.daddr = key->dst;
265 flow->l3_mask.ipv6.daddr = mask->dst;
266 flow->l3_key.ipv6.saddr = key->src;
267 flow->l3_mask.ipv6.saddr = mask->src;
268 }
269
270 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_PORTS)) {
271 struct flow_dissector_key_ports *key =
272 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_PORTS);
273 struct flow_dissector_key_ports *mask =
274 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_PORTS);
275
276 flow->flags |= BNXT_TC_FLOW_FLAGS_PORTS;
277 flow->l4_key.ports.dport = key->dst;
278 flow->l4_mask.ports.dport = mask->dst;
279 flow->l4_key.ports.sport = key->src;
280 flow->l4_mask.ports.sport = mask->src;
281 }
282
283 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ICMP)) {
284 struct flow_dissector_key_icmp *key =
285 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ICMP);
286 struct flow_dissector_key_icmp *mask =
287 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_ICMP);
288
289 flow->flags |= BNXT_TC_FLOW_FLAGS_ICMP;
290 flow->l4_key.icmp.type = key->type;
291 flow->l4_key.icmp.code = key->code;
292 flow->l4_mask.icmp.type = mask->type;
293 flow->l4_mask.icmp.code = mask->code;
294 }
295
296 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
297 struct flow_dissector_key_ipv4_addrs *key =
298 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS);
299 struct flow_dissector_key_ipv4_addrs *mask =
300 GET_MASK(tc_flow_cmd,
301 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS);
302
303 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS;
304 flow->tun_key.u.ipv4.dst = key->dst;
305 flow->tun_mask.u.ipv4.dst = mask->dst;
306 flow->tun_key.u.ipv4.src = key->src;
307 flow->tun_mask.u.ipv4.src = mask->src;
308 } else if (dissector_uses_key(dissector,
309 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS)) {
310 return -EOPNOTSUPP;
311 }
312
313 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
314 struct flow_dissector_key_keyid *key =
315 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_KEYID);
316 struct flow_dissector_key_keyid *mask =
317 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_KEYID);
318
319 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ID;
320 flow->tun_key.tun_id = key32_to_tunnel_id(key->keyid);
321 flow->tun_mask.tun_id = key32_to_tunnel_id(mask->keyid);
322 }
323
324 if (dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
325 struct flow_dissector_key_ports *key =
326 GET_KEY(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_PORTS);
327 struct flow_dissector_key_ports *mask =
328 GET_MASK(tc_flow_cmd, FLOW_DISSECTOR_KEY_ENC_PORTS);
329
330 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_PORTS;
331 flow->tun_key.tp_dst = key->dst;
332 flow->tun_mask.tp_dst = mask->dst;
333 flow->tun_key.tp_src = key->src;
334 flow->tun_mask.tp_src = mask->src;
335 }
336
337 return bnxt_tc_parse_actions(bp, &flow->actions, tc_flow_cmd->exts);
338 }
339
340 static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp,
341 struct bnxt_tc_flow_node *flow_node)
342 {
343 struct hwrm_cfa_flow_free_input req = { 0 };
344 int rc;
345
346 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_FREE, -1, -1);
347 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE)
348 req.ext_flow_handle = flow_node->ext_flow_handle;
349 else
350 req.flow_handle = flow_node->flow_handle;
351
352 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
353 if (rc)
354 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
355
356 if (rc)
357 rc = -EIO;
358 return rc;
359 }
360
361 static int ipv6_mask_len(struct in6_addr *mask)
362 {
363 int mask_len = 0, i;
364
365 for (i = 0; i < 4; i++)
366 mask_len += inet_mask_len(mask->s6_addr32[i]);
367
368 return mask_len;
369 }
370
371 static bool is_wildcard(void *mask, int len)
372 {
373 const u8 *p = mask;
374 int i;
375
376 for (i = 0; i < len; i++) {
377 if (p[i] != 0)
378 return false;
379 }
380 return true;
381 }
382
383 static bool is_exactmatch(void *mask, int len)
384 {
385 const u8 *p = mask;
386 int i;
387
388 for (i = 0; i < len; i++)
389 if (p[i] != 0xff)
390 return false;
391
392 return true;
393 }
394
395 static bool is_vlan_tci_allowed(__be16 vlan_tci_mask,
396 __be16 vlan_tci)
397 {
398 /* VLAN priority must be either exactly zero or fully wildcarded and
399 * VLAN id must be exact match.
400 */
401 if (is_vid_exactmatch(vlan_tci_mask) &&
402 ((is_vlan_pcp_exactmatch(vlan_tci_mask) &&
403 is_vlan_pcp_zero(vlan_tci)) ||
404 is_vlan_pcp_wildcarded(vlan_tci_mask)))
405 return true;
406
407 return false;
408 }
409
410 static bool bits_set(void *key, int len)
411 {
412 const u8 *p = key;
413 int i;
414
415 for (i = 0; i < len; i++)
416 if (p[i] != 0)
417 return true;
418
419 return false;
420 }
421
422 static int bnxt_hwrm_cfa_flow_alloc(struct bnxt *bp, struct bnxt_tc_flow *flow,
423 __le16 ref_flow_handle,
424 __le32 tunnel_handle,
425 struct bnxt_tc_flow_node *flow_node)
426 {
427 struct bnxt_tc_actions *actions = &flow->actions;
428 struct bnxt_tc_l3_key *l3_mask = &flow->l3_mask;
429 struct bnxt_tc_l3_key *l3_key = &flow->l3_key;
430 struct hwrm_cfa_flow_alloc_input req = { 0 };
431 struct hwrm_cfa_flow_alloc_output *resp;
432 u16 flow_flags = 0, action_flags = 0;
433 int rc;
434
435 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_ALLOC, -1, -1);
436
437 req.src_fid = cpu_to_le16(flow->src_fid);
438 req.ref_flow_handle = ref_flow_handle;
439
440 if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP ||
441 actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
442 req.tunnel_handle = tunnel_handle;
443 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_TUNNEL;
444 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_TUNNEL;
445 }
446
447 req.ethertype = flow->l2_key.ether_type;
448 req.ip_proto = flow->l4_key.ip_proto;
449
450 if (flow->flags & BNXT_TC_FLOW_FLAGS_ETH_ADDRS) {
451 memcpy(req.dmac, flow->l2_key.dmac, ETH_ALEN);
452 memcpy(req.smac, flow->l2_key.smac, ETH_ALEN);
453 }
454
455 if (flow->l2_key.num_vlans > 0) {
456 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_NUM_VLAN_ONE;
457 /* FW expects the inner_vlan_tci value to be set
458 * in outer_vlan_tci when num_vlans is 1 (which is
459 * always the case in TC.)
460 */
461 req.outer_vlan_tci = flow->l2_key.inner_vlan_tci;
462 }
463
464 /* If all IP and L4 fields are wildcarded then this is an L2 flow */
465 if (is_wildcard(l3_mask, sizeof(*l3_mask)) &&
466 is_wildcard(&flow->l4_mask, sizeof(flow->l4_mask))) {
467 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_L2;
468 } else {
469 flow_flags |= flow->l2_key.ether_type == htons(ETH_P_IP) ?
470 CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV4 :
471 CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV6;
472
473 if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV4_ADDRS) {
474 req.ip_dst[0] = l3_key->ipv4.daddr.s_addr;
475 req.ip_dst_mask_len =
476 inet_mask_len(l3_mask->ipv4.daddr.s_addr);
477 req.ip_src[0] = l3_key->ipv4.saddr.s_addr;
478 req.ip_src_mask_len =
479 inet_mask_len(l3_mask->ipv4.saddr.s_addr);
480 } else if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV6_ADDRS) {
481 memcpy(req.ip_dst, l3_key->ipv6.daddr.s6_addr32,
482 sizeof(req.ip_dst));
483 req.ip_dst_mask_len =
484 ipv6_mask_len(&l3_mask->ipv6.daddr);
485 memcpy(req.ip_src, l3_key->ipv6.saddr.s6_addr32,
486 sizeof(req.ip_src));
487 req.ip_src_mask_len =
488 ipv6_mask_len(&l3_mask->ipv6.saddr);
489 }
490 }
491
492 if (flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) {
493 req.l4_src_port = flow->l4_key.ports.sport;
494 req.l4_src_port_mask = flow->l4_mask.ports.sport;
495 req.l4_dst_port = flow->l4_key.ports.dport;
496 req.l4_dst_port_mask = flow->l4_mask.ports.dport;
497 } else if (flow->flags & BNXT_TC_FLOW_FLAGS_ICMP) {
498 /* l4 ports serve as type/code when ip_proto is ICMP */
499 req.l4_src_port = htons(flow->l4_key.icmp.type);
500 req.l4_src_port_mask = htons(flow->l4_mask.icmp.type);
501 req.l4_dst_port = htons(flow->l4_key.icmp.code);
502 req.l4_dst_port_mask = htons(flow->l4_mask.icmp.code);
503 }
504 req.flags = cpu_to_le16(flow_flags);
505
506 if (actions->flags & BNXT_TC_ACTION_FLAG_DROP) {
507 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_DROP;
508 } else {
509 if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
510 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_FWD;
511 req.dst_fid = cpu_to_le16(actions->dst_fid);
512 }
513 if (actions->flags & BNXT_TC_ACTION_FLAG_PUSH_VLAN) {
514 action_flags |=
515 CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
516 req.l2_rewrite_vlan_tpid = actions->push_vlan_tpid;
517 req.l2_rewrite_vlan_tci = actions->push_vlan_tci;
518 memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN);
519 memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN);
520 }
521 if (actions->flags & BNXT_TC_ACTION_FLAG_POP_VLAN) {
522 action_flags |=
523 CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
524 /* Rewrite config with tpid = 0 implies vlan pop */
525 req.l2_rewrite_vlan_tpid = 0;
526 memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN);
527 memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN);
528 }
529 }
530 req.action_flags = cpu_to_le16(action_flags);
531
532 mutex_lock(&bp->hwrm_cmd_lock);
533 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
534 if (!rc) {
535 resp = bnxt_get_hwrm_resp_addr(bp, &req);
536 /* CFA_FLOW_ALLOC response interpretation:
537 * fw with fw with
538 * 16-bit 64-bit
539 * flow handle flow handle
540 * =========== ===========
541 * flow_handle flow handle flow context id
542 * ext_flow_handle INVALID flow handle
543 * flow_id INVALID flow counter id
544 */
545 flow_node->flow_handle = resp->flow_handle;
546 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) {
547 flow_node->ext_flow_handle = resp->ext_flow_handle;
548 flow_node->flow_id = resp->flow_id;
549 }
550 }
551 mutex_unlock(&bp->hwrm_cmd_lock);
552
553 if (rc == HWRM_ERR_CODE_RESOURCE_ALLOC_ERROR)
554 rc = -ENOSPC;
555 else if (rc)
556 rc = -EIO;
557 return rc;
558 }
559
560 static int hwrm_cfa_decap_filter_alloc(struct bnxt *bp,
561 struct bnxt_tc_flow *flow,
562 struct bnxt_tc_l2_key *l2_info,
563 __le32 ref_decap_handle,
564 __le32 *decap_filter_handle)
565 {
566 struct hwrm_cfa_decap_filter_alloc_input req = { 0 };
567 struct hwrm_cfa_decap_filter_alloc_output *resp;
568 struct ip_tunnel_key *tun_key = &flow->tun_key;
569 u32 enables = 0;
570 int rc;
571
572 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_ALLOC, -1, -1);
573
574 req.flags = cpu_to_le32(CFA_DECAP_FILTER_ALLOC_REQ_FLAGS_OVS_TUNNEL);
575 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_TYPE |
576 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IP_PROTOCOL;
577 req.tunnel_type = CFA_DECAP_FILTER_ALLOC_REQ_TUNNEL_TYPE_VXLAN;
578 req.ip_protocol = CFA_DECAP_FILTER_ALLOC_REQ_IP_PROTOCOL_UDP;
579
580 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ID) {
581 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_ID;
582 /* tunnel_id is wrongly defined in hsi defn. as __le32 */
583 req.tunnel_id = tunnel_id_to_key32(tun_key->tun_id);
584 }
585
586 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS) {
587 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_MACADDR;
588 ether_addr_copy(req.dst_macaddr, l2_info->dmac);
589 }
590 if (l2_info->num_vlans) {
591 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_T_IVLAN_VID;
592 req.t_ivlan_vid = l2_info->inner_vlan_tci;
593 }
594
595 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_ETHERTYPE;
596 req.ethertype = htons(ETH_P_IP);
597
598 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS) {
599 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_SRC_IPADDR |
600 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_IPADDR |
601 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IPADDR_TYPE;
602 req.ip_addr_type = CFA_DECAP_FILTER_ALLOC_REQ_IP_ADDR_TYPE_IPV4;
603 req.dst_ipaddr[0] = tun_key->u.ipv4.dst;
604 req.src_ipaddr[0] = tun_key->u.ipv4.src;
605 }
606
607 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_PORTS) {
608 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_PORT;
609 req.dst_port = tun_key->tp_dst;
610 }
611
612 /* Eventhough the decap_handle returned by hwrm_cfa_decap_filter_alloc
613 * is defined as __le32, l2_ctxt_ref_id is defined in HSI as __le16.
614 */
615 req.l2_ctxt_ref_id = (__force __le16)ref_decap_handle;
616 req.enables = cpu_to_le32(enables);
617
618 mutex_lock(&bp->hwrm_cmd_lock);
619 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
620 if (!rc) {
621 resp = bnxt_get_hwrm_resp_addr(bp, &req);
622 *decap_filter_handle = resp->decap_filter_id;
623 } else {
624 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
625 }
626 mutex_unlock(&bp->hwrm_cmd_lock);
627
628 if (rc)
629 rc = -EIO;
630 return rc;
631 }
632
633 static int hwrm_cfa_decap_filter_free(struct bnxt *bp,
634 __le32 decap_filter_handle)
635 {
636 struct hwrm_cfa_decap_filter_free_input req = { 0 };
637 int rc;
638
639 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_FREE, -1, -1);
640 req.decap_filter_id = decap_filter_handle;
641
642 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
643 if (rc)
644 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
645
646 if (rc)
647 rc = -EIO;
648 return rc;
649 }
650
651 static int hwrm_cfa_encap_record_alloc(struct bnxt *bp,
652 struct ip_tunnel_key *encap_key,
653 struct bnxt_tc_l2_key *l2_info,
654 __le32 *encap_record_handle)
655 {
656 struct hwrm_cfa_encap_record_alloc_input req = { 0 };
657 struct hwrm_cfa_encap_record_alloc_output *resp;
658 struct hwrm_cfa_encap_data_vxlan *encap =
659 (struct hwrm_cfa_encap_data_vxlan *)&req.encap_data;
660 struct hwrm_vxlan_ipv4_hdr *encap_ipv4 =
661 (struct hwrm_vxlan_ipv4_hdr *)encap->l3;
662 int rc;
663
664 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_ALLOC, -1, -1);
665
666 req.encap_type = CFA_ENCAP_RECORD_ALLOC_REQ_ENCAP_TYPE_VXLAN;
667
668 ether_addr_copy(encap->dst_mac_addr, l2_info->dmac);
669 ether_addr_copy(encap->src_mac_addr, l2_info->smac);
670 if (l2_info->num_vlans) {
671 encap->num_vlan_tags = l2_info->num_vlans;
672 encap->ovlan_tci = l2_info->inner_vlan_tci;
673 encap->ovlan_tpid = l2_info->inner_vlan_tpid;
674 }
675
676 encap_ipv4->ver_hlen = 4 << VXLAN_IPV4_HDR_VER_HLEN_VERSION_SFT;
677 encap_ipv4->ver_hlen |= 5 << VXLAN_IPV4_HDR_VER_HLEN_HEADER_LENGTH_SFT;
678 encap_ipv4->ttl = encap_key->ttl;
679
680 encap_ipv4->dest_ip_addr = encap_key->u.ipv4.dst;
681 encap_ipv4->src_ip_addr = encap_key->u.ipv4.src;
682 encap_ipv4->protocol = IPPROTO_UDP;
683
684 encap->dst_port = encap_key->tp_dst;
685 encap->vni = tunnel_id_to_key32(encap_key->tun_id);
686
687 mutex_lock(&bp->hwrm_cmd_lock);
688 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
689 if (!rc) {
690 resp = bnxt_get_hwrm_resp_addr(bp, &req);
691 *encap_record_handle = resp->encap_record_id;
692 } else {
693 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
694 }
695 mutex_unlock(&bp->hwrm_cmd_lock);
696
697 if (rc)
698 rc = -EIO;
699 return rc;
700 }
701
702 static int hwrm_cfa_encap_record_free(struct bnxt *bp,
703 __le32 encap_record_handle)
704 {
705 struct hwrm_cfa_encap_record_free_input req = { 0 };
706 int rc;
707
708 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_FREE, -1, -1);
709 req.encap_record_id = encap_record_handle;
710
711 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
712 if (rc)
713 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
714
715 if (rc)
716 rc = -EIO;
717 return rc;
718 }
719
720 static int bnxt_tc_put_l2_node(struct bnxt *bp,
721 struct bnxt_tc_flow_node *flow_node)
722 {
723 struct bnxt_tc_l2_node *l2_node = flow_node->l2_node;
724 struct bnxt_tc_info *tc_info = bp->tc_info;
725 int rc;
726
727 /* remove flow_node from the L2 shared flow list */
728 list_del(&flow_node->l2_list_node);
729 if (--l2_node->refcount == 0) {
730 rc = rhashtable_remove_fast(&tc_info->l2_table, &l2_node->node,
731 tc_info->l2_ht_params);
732 if (rc)
733 netdev_err(bp->dev,
734 "Error: %s: rhashtable_remove_fast: %d",
735 __func__, rc);
736 kfree_rcu(l2_node, rcu);
737 }
738 return 0;
739 }
740
741 static struct bnxt_tc_l2_node *
742 bnxt_tc_get_l2_node(struct bnxt *bp, struct rhashtable *l2_table,
743 struct rhashtable_params ht_params,
744 struct bnxt_tc_l2_key *l2_key)
745 {
746 struct bnxt_tc_l2_node *l2_node;
747 int rc;
748
749 l2_node = rhashtable_lookup_fast(l2_table, l2_key, ht_params);
750 if (!l2_node) {
751 l2_node = kzalloc(sizeof(*l2_node), GFP_KERNEL);
752 if (!l2_node) {
753 rc = -ENOMEM;
754 return NULL;
755 }
756
757 l2_node->key = *l2_key;
758 rc = rhashtable_insert_fast(l2_table, &l2_node->node,
759 ht_params);
760 if (rc) {
761 kfree_rcu(l2_node, rcu);
762 netdev_err(bp->dev,
763 "Error: %s: rhashtable_insert_fast: %d",
764 __func__, rc);
765 return NULL;
766 }
767 INIT_LIST_HEAD(&l2_node->common_l2_flows);
768 }
769 return l2_node;
770 }
771
772 /* Get the ref_flow_handle for a flow by checking if there are any other
773 * flows that share the same L2 key as this flow.
774 */
775 static int
776 bnxt_tc_get_ref_flow_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
777 struct bnxt_tc_flow_node *flow_node,
778 __le16 *ref_flow_handle)
779 {
780 struct bnxt_tc_info *tc_info = bp->tc_info;
781 struct bnxt_tc_flow_node *ref_flow_node;
782 struct bnxt_tc_l2_node *l2_node;
783
784 l2_node = bnxt_tc_get_l2_node(bp, &tc_info->l2_table,
785 tc_info->l2_ht_params,
786 &flow->l2_key);
787 if (!l2_node)
788 return -1;
789
790 /* If any other flow is using this l2_node, use it's flow_handle
791 * as the ref_flow_handle
792 */
793 if (l2_node->refcount > 0) {
794 ref_flow_node = list_first_entry(&l2_node->common_l2_flows,
795 struct bnxt_tc_flow_node,
796 l2_list_node);
797 *ref_flow_handle = ref_flow_node->flow_handle;
798 } else {
799 *ref_flow_handle = cpu_to_le16(0xffff);
800 }
801
802 /* Insert the l2_node into the flow_node so that subsequent flows
803 * with a matching l2 key can use the flow_handle of this flow
804 * as their ref_flow_handle
805 */
806 flow_node->l2_node = l2_node;
807 list_add(&flow_node->l2_list_node, &l2_node->common_l2_flows);
808 l2_node->refcount++;
809 return 0;
810 }
811
812 /* After the flow parsing is done, this routine is used for checking
813 * if there are any aspects of the flow that prevent it from being
814 * offloaded.
815 */
816 static bool bnxt_tc_can_offload(struct bnxt *bp, struct bnxt_tc_flow *flow)
817 {
818 /* If L4 ports are specified then ip_proto must be TCP or UDP */
819 if ((flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) &&
820 (flow->l4_key.ip_proto != IPPROTO_TCP &&
821 flow->l4_key.ip_proto != IPPROTO_UDP)) {
822 netdev_info(bp->dev, "Cannot offload non-TCP/UDP (%d) ports",
823 flow->l4_key.ip_proto);
824 return false;
825 }
826
827 /* Currently source/dest MAC cannot be partial wildcard */
828 if (bits_set(&flow->l2_key.smac, sizeof(flow->l2_key.smac)) &&
829 !is_exactmatch(flow->l2_mask.smac, sizeof(flow->l2_mask.smac))) {
830 netdev_info(bp->dev, "Wildcard match unsupported for Source MAC\n");
831 return false;
832 }
833 if (bits_set(&flow->l2_key.dmac, sizeof(flow->l2_key.dmac)) &&
834 !is_exactmatch(&flow->l2_mask.dmac, sizeof(flow->l2_mask.dmac))) {
835 netdev_info(bp->dev, "Wildcard match unsupported for Dest MAC\n");
836 return false;
837 }
838
839 /* Currently VLAN fields cannot be partial wildcard */
840 if (bits_set(&flow->l2_key.inner_vlan_tci,
841 sizeof(flow->l2_key.inner_vlan_tci)) &&
842 !is_vlan_tci_allowed(flow->l2_mask.inner_vlan_tci,
843 flow->l2_key.inner_vlan_tci)) {
844 netdev_info(bp->dev, "Unsupported VLAN TCI\n");
845 return false;
846 }
847 if (bits_set(&flow->l2_key.inner_vlan_tpid,
848 sizeof(flow->l2_key.inner_vlan_tpid)) &&
849 !is_exactmatch(&flow->l2_mask.inner_vlan_tpid,
850 sizeof(flow->l2_mask.inner_vlan_tpid))) {
851 netdev_info(bp->dev, "Wildcard match unsupported for VLAN TPID\n");
852 return false;
853 }
854
855 /* Currently Ethertype must be set */
856 if (!is_exactmatch(&flow->l2_mask.ether_type,
857 sizeof(flow->l2_mask.ether_type))) {
858 netdev_info(bp->dev, "Wildcard match unsupported for Ethertype\n");
859 return false;
860 }
861
862 return true;
863 }
864
865 /* Returns the final refcount of the node on success
866 * or a -ve error code on failure
867 */
868 static int bnxt_tc_put_tunnel_node(struct bnxt *bp,
869 struct rhashtable *tunnel_table,
870 struct rhashtable_params *ht_params,
871 struct bnxt_tc_tunnel_node *tunnel_node)
872 {
873 int rc;
874
875 if (--tunnel_node->refcount == 0) {
876 rc = rhashtable_remove_fast(tunnel_table, &tunnel_node->node,
877 *ht_params);
878 if (rc) {
879 netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc);
880 rc = -1;
881 }
882 kfree_rcu(tunnel_node, rcu);
883 return rc;
884 } else {
885 return tunnel_node->refcount;
886 }
887 }
888
889 /* Get (or add) either encap or decap tunnel node from/to the supplied
890 * hash table.
891 */
892 static struct bnxt_tc_tunnel_node *
893 bnxt_tc_get_tunnel_node(struct bnxt *bp, struct rhashtable *tunnel_table,
894 struct rhashtable_params *ht_params,
895 struct ip_tunnel_key *tun_key)
896 {
897 struct bnxt_tc_tunnel_node *tunnel_node;
898 int rc;
899
900 tunnel_node = rhashtable_lookup_fast(tunnel_table, tun_key, *ht_params);
901 if (!tunnel_node) {
902 tunnel_node = kzalloc(sizeof(*tunnel_node), GFP_KERNEL);
903 if (!tunnel_node) {
904 rc = -ENOMEM;
905 goto err;
906 }
907
908 tunnel_node->key = *tun_key;
909 tunnel_node->tunnel_handle = INVALID_TUNNEL_HANDLE;
910 rc = rhashtable_insert_fast(tunnel_table, &tunnel_node->node,
911 *ht_params);
912 if (rc) {
913 kfree_rcu(tunnel_node, rcu);
914 goto err;
915 }
916 }
917 tunnel_node->refcount++;
918 return tunnel_node;
919 err:
920 netdev_info(bp->dev, "error rc=%d", rc);
921 return NULL;
922 }
923
924 static int bnxt_tc_get_ref_decap_handle(struct bnxt *bp,
925 struct bnxt_tc_flow *flow,
926 struct bnxt_tc_l2_key *l2_key,
927 struct bnxt_tc_flow_node *flow_node,
928 __le32 *ref_decap_handle)
929 {
930 struct bnxt_tc_info *tc_info = bp->tc_info;
931 struct bnxt_tc_flow_node *ref_flow_node;
932 struct bnxt_tc_l2_node *decap_l2_node;
933
934 decap_l2_node = bnxt_tc_get_l2_node(bp, &tc_info->decap_l2_table,
935 tc_info->decap_l2_ht_params,
936 l2_key);
937 if (!decap_l2_node)
938 return -1;
939
940 /* If any other flow is using this decap_l2_node, use it's decap_handle
941 * as the ref_decap_handle
942 */
943 if (decap_l2_node->refcount > 0) {
944 ref_flow_node =
945 list_first_entry(&decap_l2_node->common_l2_flows,
946 struct bnxt_tc_flow_node,
947 decap_l2_list_node);
948 *ref_decap_handle = ref_flow_node->decap_node->tunnel_handle;
949 } else {
950 *ref_decap_handle = INVALID_TUNNEL_HANDLE;
951 }
952
953 /* Insert the l2_node into the flow_node so that subsequent flows
954 * with a matching decap l2 key can use the decap_filter_handle of
955 * this flow as their ref_decap_handle
956 */
957 flow_node->decap_l2_node = decap_l2_node;
958 list_add(&flow_node->decap_l2_list_node,
959 &decap_l2_node->common_l2_flows);
960 decap_l2_node->refcount++;
961 return 0;
962 }
963
964 static void bnxt_tc_put_decap_l2_node(struct bnxt *bp,
965 struct bnxt_tc_flow_node *flow_node)
966 {
967 struct bnxt_tc_l2_node *decap_l2_node = flow_node->decap_l2_node;
968 struct bnxt_tc_info *tc_info = bp->tc_info;
969 int rc;
970
971 /* remove flow_node from the decap L2 sharing flow list */
972 list_del(&flow_node->decap_l2_list_node);
973 if (--decap_l2_node->refcount == 0) {
974 rc = rhashtable_remove_fast(&tc_info->decap_l2_table,
975 &decap_l2_node->node,
976 tc_info->decap_l2_ht_params);
977 if (rc)
978 netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc);
979 kfree_rcu(decap_l2_node, rcu);
980 }
981 }
982
983 static void bnxt_tc_put_decap_handle(struct bnxt *bp,
984 struct bnxt_tc_flow_node *flow_node)
985 {
986 __le32 decap_handle = flow_node->decap_node->tunnel_handle;
987 struct bnxt_tc_info *tc_info = bp->tc_info;
988 int rc;
989
990 if (flow_node->decap_l2_node)
991 bnxt_tc_put_decap_l2_node(bp, flow_node);
992
993 rc = bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table,
994 &tc_info->decap_ht_params,
995 flow_node->decap_node);
996 if (!rc && decap_handle != INVALID_TUNNEL_HANDLE)
997 hwrm_cfa_decap_filter_free(bp, decap_handle);
998 }
999
1000 static int bnxt_tc_resolve_tunnel_hdrs(struct bnxt *bp,
1001 struct ip_tunnel_key *tun_key,
1002 struct bnxt_tc_l2_key *l2_info)
1003 {
1004 #ifdef CONFIG_INET
1005 struct net_device *real_dst_dev = bp->dev;
1006 struct flowi4 flow = { {0} };
1007 struct net_device *dst_dev;
1008 struct neighbour *nbr;
1009 struct rtable *rt;
1010 int rc;
1011
1012 flow.flowi4_proto = IPPROTO_UDP;
1013 flow.fl4_dport = tun_key->tp_dst;
1014 flow.daddr = tun_key->u.ipv4.dst;
1015
1016 rt = ip_route_output_key(dev_net(real_dst_dev), &flow);
1017 if (IS_ERR(rt)) {
1018 netdev_info(bp->dev, "no route to %pI4b", &flow.daddr);
1019 return -EOPNOTSUPP;
1020 }
1021
1022 /* The route must either point to the real_dst_dev or a dst_dev that
1023 * uses the real_dst_dev.
1024 */
1025 dst_dev = rt->dst.dev;
1026 if (is_vlan_dev(dst_dev)) {
1027 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1028 struct vlan_dev_priv *vlan = vlan_dev_priv(dst_dev);
1029
1030 if (vlan->real_dev != real_dst_dev) {
1031 netdev_info(bp->dev,
1032 "dst_dev(%s) doesn't use PF-if(%s)",
1033 netdev_name(dst_dev),
1034 netdev_name(real_dst_dev));
1035 rc = -EOPNOTSUPP;
1036 goto put_rt;
1037 }
1038 l2_info->inner_vlan_tci = htons(vlan->vlan_id);
1039 l2_info->inner_vlan_tpid = vlan->vlan_proto;
1040 l2_info->num_vlans = 1;
1041 #endif
1042 } else if (dst_dev != real_dst_dev) {
1043 netdev_info(bp->dev,
1044 "dst_dev(%s) for %pI4b is not PF-if(%s)",
1045 netdev_name(dst_dev), &flow.daddr,
1046 netdev_name(real_dst_dev));
1047 rc = -EOPNOTSUPP;
1048 goto put_rt;
1049 }
1050
1051 nbr = dst_neigh_lookup(&rt->dst, &flow.daddr);
1052 if (!nbr) {
1053 netdev_info(bp->dev, "can't lookup neighbor for %pI4b",
1054 &flow.daddr);
1055 rc = -EOPNOTSUPP;
1056 goto put_rt;
1057 }
1058
1059 tun_key->u.ipv4.src = flow.saddr;
1060 tun_key->ttl = ip4_dst_hoplimit(&rt->dst);
1061 neigh_ha_snapshot(l2_info->dmac, nbr, dst_dev);
1062 ether_addr_copy(l2_info->smac, dst_dev->dev_addr);
1063 neigh_release(nbr);
1064 ip_rt_put(rt);
1065
1066 return 0;
1067 put_rt:
1068 ip_rt_put(rt);
1069 return rc;
1070 #else
1071 return -EOPNOTSUPP;
1072 #endif
1073 }
1074
1075 static int bnxt_tc_get_decap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
1076 struct bnxt_tc_flow_node *flow_node,
1077 __le32 *decap_filter_handle)
1078 {
1079 struct ip_tunnel_key *decap_key = &flow->tun_key;
1080 struct bnxt_tc_info *tc_info = bp->tc_info;
1081 struct bnxt_tc_l2_key l2_info = { {0} };
1082 struct bnxt_tc_tunnel_node *decap_node;
1083 struct ip_tunnel_key tun_key = { 0 };
1084 struct bnxt_tc_l2_key *decap_l2_info;
1085 __le32 ref_decap_handle;
1086 int rc;
1087
1088 /* Check if there's another flow using the same tunnel decap.
1089 * If not, add this tunnel to the table and resolve the other
1090 * tunnel header fileds. Ignore src_port in the tunnel_key,
1091 * since it is not required for decap filters.
1092 */
1093 decap_key->tp_src = 0;
1094 decap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->decap_table,
1095 &tc_info->decap_ht_params,
1096 decap_key);
1097 if (!decap_node)
1098 return -ENOMEM;
1099
1100 flow_node->decap_node = decap_node;
1101
1102 if (decap_node->tunnel_handle != INVALID_TUNNEL_HANDLE)
1103 goto done;
1104
1105 /* Resolve the L2 fields for tunnel decap
1106 * Resolve the route for remote vtep (saddr) of the decap key
1107 * Find it's next-hop mac addrs
1108 */
1109 tun_key.u.ipv4.dst = flow->tun_key.u.ipv4.src;
1110 tun_key.tp_dst = flow->tun_key.tp_dst;
1111 rc = bnxt_tc_resolve_tunnel_hdrs(bp, &tun_key, &l2_info);
1112 if (rc)
1113 goto put_decap;
1114
1115 decap_l2_info = &decap_node->l2_info;
1116 /* decap smac is wildcarded */
1117 ether_addr_copy(decap_l2_info->dmac, l2_info.smac);
1118 if (l2_info.num_vlans) {
1119 decap_l2_info->num_vlans = l2_info.num_vlans;
1120 decap_l2_info->inner_vlan_tpid = l2_info.inner_vlan_tpid;
1121 decap_l2_info->inner_vlan_tci = l2_info.inner_vlan_tci;
1122 }
1123 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS;
1124
1125 /* For getting a decap_filter_handle we first need to check if
1126 * there are any other decap flows that share the same tunnel L2
1127 * key and if so, pass that flow's decap_filter_handle as the
1128 * ref_decap_handle for this flow.
1129 */
1130 rc = bnxt_tc_get_ref_decap_handle(bp, flow, decap_l2_info, flow_node,
1131 &ref_decap_handle);
1132 if (rc)
1133 goto put_decap;
1134
1135 /* Issue the hwrm cmd to allocate a decap filter handle */
1136 rc = hwrm_cfa_decap_filter_alloc(bp, flow, decap_l2_info,
1137 ref_decap_handle,
1138 &decap_node->tunnel_handle);
1139 if (rc)
1140 goto put_decap_l2;
1141
1142 done:
1143 *decap_filter_handle = decap_node->tunnel_handle;
1144 return 0;
1145
1146 put_decap_l2:
1147 bnxt_tc_put_decap_l2_node(bp, flow_node);
1148 put_decap:
1149 bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table,
1150 &tc_info->decap_ht_params,
1151 flow_node->decap_node);
1152 return rc;
1153 }
1154
1155 static void bnxt_tc_put_encap_handle(struct bnxt *bp,
1156 struct bnxt_tc_tunnel_node *encap_node)
1157 {
1158 __le32 encap_handle = encap_node->tunnel_handle;
1159 struct bnxt_tc_info *tc_info = bp->tc_info;
1160 int rc;
1161
1162 rc = bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table,
1163 &tc_info->encap_ht_params, encap_node);
1164 if (!rc && encap_handle != INVALID_TUNNEL_HANDLE)
1165 hwrm_cfa_encap_record_free(bp, encap_handle);
1166 }
1167
1168 /* Lookup the tunnel encap table and check if there's an encap_handle
1169 * alloc'd already.
1170 * If not, query L2 info via a route lookup and issue an encap_record_alloc
1171 * cmd to FW.
1172 */
1173 static int bnxt_tc_get_encap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
1174 struct bnxt_tc_flow_node *flow_node,
1175 __le32 *encap_handle)
1176 {
1177 struct ip_tunnel_key *encap_key = &flow->actions.tun_encap_key;
1178 struct bnxt_tc_info *tc_info = bp->tc_info;
1179 struct bnxt_tc_tunnel_node *encap_node;
1180 int rc;
1181
1182 /* Check if there's another flow using the same tunnel encap.
1183 * If not, add this tunnel to the table and resolve the other
1184 * tunnel header fileds
1185 */
1186 encap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->encap_table,
1187 &tc_info->encap_ht_params,
1188 encap_key);
1189 if (!encap_node)
1190 return -ENOMEM;
1191
1192 flow_node->encap_node = encap_node;
1193
1194 if (encap_node->tunnel_handle != INVALID_TUNNEL_HANDLE)
1195 goto done;
1196
1197 rc = bnxt_tc_resolve_tunnel_hdrs(bp, encap_key, &encap_node->l2_info);
1198 if (rc)
1199 goto put_encap;
1200
1201 /* Allocate a new tunnel encap record */
1202 rc = hwrm_cfa_encap_record_alloc(bp, encap_key, &encap_node->l2_info,
1203 &encap_node->tunnel_handle);
1204 if (rc)
1205 goto put_encap;
1206
1207 done:
1208 *encap_handle = encap_node->tunnel_handle;
1209 return 0;
1210
1211 put_encap:
1212 bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table,
1213 &tc_info->encap_ht_params, encap_node);
1214 return rc;
1215 }
1216
1217 static void bnxt_tc_put_tunnel_handle(struct bnxt *bp,
1218 struct bnxt_tc_flow *flow,
1219 struct bnxt_tc_flow_node *flow_node)
1220 {
1221 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1222 bnxt_tc_put_decap_handle(bp, flow_node);
1223 else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP)
1224 bnxt_tc_put_encap_handle(bp, flow_node->encap_node);
1225 }
1226
1227 static int bnxt_tc_get_tunnel_handle(struct bnxt *bp,
1228 struct bnxt_tc_flow *flow,
1229 struct bnxt_tc_flow_node *flow_node,
1230 __le32 *tunnel_handle)
1231 {
1232 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1233 return bnxt_tc_get_decap_handle(bp, flow, flow_node,
1234 tunnel_handle);
1235 else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP)
1236 return bnxt_tc_get_encap_handle(bp, flow, flow_node,
1237 tunnel_handle);
1238 else
1239 return 0;
1240 }
1241 static int __bnxt_tc_del_flow(struct bnxt *bp,
1242 struct bnxt_tc_flow_node *flow_node)
1243 {
1244 struct bnxt_tc_info *tc_info = bp->tc_info;
1245 int rc;
1246
1247 /* send HWRM cmd to free the flow-id */
1248 bnxt_hwrm_cfa_flow_free(bp, flow_node);
1249
1250 mutex_lock(&tc_info->lock);
1251
1252 /* release references to any tunnel encap/decap nodes */
1253 bnxt_tc_put_tunnel_handle(bp, &flow_node->flow, flow_node);
1254
1255 /* release reference to l2 node */
1256 bnxt_tc_put_l2_node(bp, flow_node);
1257
1258 mutex_unlock(&tc_info->lock);
1259
1260 rc = rhashtable_remove_fast(&tc_info->flow_table, &flow_node->node,
1261 tc_info->flow_ht_params);
1262 if (rc)
1263 netdev_err(bp->dev, "Error: %s: rhashtable_remove_fast rc=%d",
1264 __func__, rc);
1265
1266 kfree_rcu(flow_node, rcu);
1267 return 0;
1268 }
1269
1270 static void bnxt_tc_set_flow_dir(struct bnxt *bp, struct bnxt_tc_flow *flow,
1271 u16 src_fid)
1272 {
1273 flow->dir = (bp->pf.fw_fid == src_fid) ? BNXT_DIR_RX : BNXT_DIR_TX;
1274 }
1275
1276 static void bnxt_tc_set_src_fid(struct bnxt *bp, struct bnxt_tc_flow *flow,
1277 u16 src_fid)
1278 {
1279 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1280 flow->src_fid = bp->pf.fw_fid;
1281 else
1282 flow->src_fid = src_fid;
1283 }
1284
1285 /* Add a new flow or replace an existing flow.
1286 * Notes on locking:
1287 * There are essentially two critical sections here.
1288 * 1. while adding a new flow
1289 * a) lookup l2-key
1290 * b) issue HWRM cmd and get flow_handle
1291 * c) link l2-key with flow
1292 * 2. while deleting a flow
1293 * a) unlinking l2-key from flow
1294 * A lock is needed to protect these two critical sections.
1295 *
1296 * The hash-tables are already protected by the rhashtable API.
1297 */
1298 static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid,
1299 struct tc_cls_flower_offload *tc_flow_cmd)
1300 {
1301 struct bnxt_tc_flow_node *new_node, *old_node;
1302 struct bnxt_tc_info *tc_info = bp->tc_info;
1303 struct bnxt_tc_flow *flow;
1304 __le32 tunnel_handle = 0;
1305 __le16 ref_flow_handle;
1306 int rc;
1307
1308 /* allocate memory for the new flow and it's node */
1309 new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
1310 if (!new_node) {
1311 rc = -ENOMEM;
1312 goto done;
1313 }
1314 new_node->cookie = tc_flow_cmd->cookie;
1315 flow = &new_node->flow;
1316
1317 rc = bnxt_tc_parse_flow(bp, tc_flow_cmd, flow);
1318 if (rc)
1319 goto free_node;
1320
1321 bnxt_tc_set_src_fid(bp, flow, src_fid);
1322
1323 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE)
1324 bnxt_tc_set_flow_dir(bp, flow, src_fid);
1325
1326 if (!bnxt_tc_can_offload(bp, flow)) {
1327 rc = -ENOSPC;
1328 goto free_node;
1329 }
1330
1331 /* If a flow exists with the same cookie, delete it */
1332 old_node = rhashtable_lookup_fast(&tc_info->flow_table,
1333 &tc_flow_cmd->cookie,
1334 tc_info->flow_ht_params);
1335 if (old_node)
1336 __bnxt_tc_del_flow(bp, old_node);
1337
1338 /* Check if the L2 part of the flow has been offloaded already.
1339 * If so, bump up it's refcnt and get it's reference handle.
1340 */
1341 mutex_lock(&tc_info->lock);
1342 rc = bnxt_tc_get_ref_flow_handle(bp, flow, new_node, &ref_flow_handle);
1343 if (rc)
1344 goto unlock;
1345
1346 /* If the flow involves tunnel encap/decap, get tunnel_handle */
1347 rc = bnxt_tc_get_tunnel_handle(bp, flow, new_node, &tunnel_handle);
1348 if (rc)
1349 goto put_l2;
1350
1351 /* send HWRM cmd to alloc the flow */
1352 rc = bnxt_hwrm_cfa_flow_alloc(bp, flow, ref_flow_handle,
1353 tunnel_handle, new_node);
1354 if (rc)
1355 goto put_tunnel;
1356
1357 flow->lastused = jiffies;
1358 spin_lock_init(&flow->stats_lock);
1359 /* add new flow to flow-table */
1360 rc = rhashtable_insert_fast(&tc_info->flow_table, &new_node->node,
1361 tc_info->flow_ht_params);
1362 if (rc)
1363 goto hwrm_flow_free;
1364
1365 mutex_unlock(&tc_info->lock);
1366 return 0;
1367
1368 hwrm_flow_free:
1369 bnxt_hwrm_cfa_flow_free(bp, new_node);
1370 put_tunnel:
1371 bnxt_tc_put_tunnel_handle(bp, flow, new_node);
1372 put_l2:
1373 bnxt_tc_put_l2_node(bp, new_node);
1374 unlock:
1375 mutex_unlock(&tc_info->lock);
1376 free_node:
1377 kfree_rcu(new_node, rcu);
1378 done:
1379 netdev_err(bp->dev, "Error: %s: cookie=0x%lx error=%d",
1380 __func__, tc_flow_cmd->cookie, rc);
1381 return rc;
1382 }
1383
1384 static int bnxt_tc_del_flow(struct bnxt *bp,
1385 struct tc_cls_flower_offload *tc_flow_cmd)
1386 {
1387 struct bnxt_tc_info *tc_info = bp->tc_info;
1388 struct bnxt_tc_flow_node *flow_node;
1389
1390 flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
1391 &tc_flow_cmd->cookie,
1392 tc_info->flow_ht_params);
1393 if (!flow_node)
1394 return -EINVAL;
1395
1396 return __bnxt_tc_del_flow(bp, flow_node);
1397 }
1398
1399 static int bnxt_tc_get_flow_stats(struct bnxt *bp,
1400 struct tc_cls_flower_offload *tc_flow_cmd)
1401 {
1402 struct bnxt_tc_flow_stats stats, *curr_stats, *prev_stats;
1403 struct bnxt_tc_info *tc_info = bp->tc_info;
1404 struct bnxt_tc_flow_node *flow_node;
1405 struct bnxt_tc_flow *flow;
1406 unsigned long lastused;
1407
1408 flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
1409 &tc_flow_cmd->cookie,
1410 tc_info->flow_ht_params);
1411 if (!flow_node)
1412 return -1;
1413
1414 flow = &flow_node->flow;
1415 curr_stats = &flow->stats;
1416 prev_stats = &flow->prev_stats;
1417
1418 spin_lock(&flow->stats_lock);
1419 stats.packets = curr_stats->packets - prev_stats->packets;
1420 stats.bytes = curr_stats->bytes - prev_stats->bytes;
1421 *prev_stats = *curr_stats;
1422 lastused = flow->lastused;
1423 spin_unlock(&flow->stats_lock);
1424
1425 tcf_exts_stats_update(tc_flow_cmd->exts, stats.bytes, stats.packets,
1426 lastused);
1427 return 0;
1428 }
1429
1430 static void bnxt_fill_cfa_stats_req(struct bnxt *bp,
1431 struct bnxt_tc_flow_node *flow_node,
1432 __le16 *flow_handle, __le32 *flow_id)
1433 {
1434 u16 handle;
1435
1436 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) {
1437 *flow_id = flow_node->flow_id;
1438
1439 /* If flow_id is used to fetch flow stats then:
1440 * 1. lower 12 bits of flow_handle must be set to all 1s.
1441 * 2. 15th bit of flow_handle must specify the flow
1442 * direction (TX/RX).
1443 */
1444 if (flow_node->flow.dir == BNXT_DIR_RX)
1445 handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_DIR_RX |
1446 CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK;
1447 else
1448 handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK;
1449
1450 *flow_handle = cpu_to_le16(handle);
1451 } else {
1452 *flow_handle = flow_node->flow_handle;
1453 }
1454 }
1455
1456 static int
1457 bnxt_hwrm_cfa_flow_stats_get(struct bnxt *bp, int num_flows,
1458 struct bnxt_tc_stats_batch stats_batch[])
1459 {
1460 struct hwrm_cfa_flow_stats_input req = { 0 };
1461 struct hwrm_cfa_flow_stats_output *resp;
1462 __le16 *req_flow_handles = &req.flow_handle_0;
1463 __le32 *req_flow_ids = &req.flow_id_0;
1464 int rc, i;
1465
1466 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_STATS, -1, -1);
1467 req.num_flows = cpu_to_le16(num_flows);
1468 for (i = 0; i < num_flows; i++) {
1469 struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node;
1470
1471 bnxt_fill_cfa_stats_req(bp, flow_node,
1472 &req_flow_handles[i], &req_flow_ids[i]);
1473 }
1474
1475 mutex_lock(&bp->hwrm_cmd_lock);
1476 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
1477 if (!rc) {
1478 __le64 *resp_packets;
1479 __le64 *resp_bytes;
1480
1481 resp = bnxt_get_hwrm_resp_addr(bp, &req);
1482 resp_packets = &resp->packet_0;
1483 resp_bytes = &resp->byte_0;
1484
1485 for (i = 0; i < num_flows; i++) {
1486 stats_batch[i].hw_stats.packets =
1487 le64_to_cpu(resp_packets[i]);
1488 stats_batch[i].hw_stats.bytes =
1489 le64_to_cpu(resp_bytes[i]);
1490 }
1491 } else {
1492 netdev_info(bp->dev, "error rc=%d", rc);
1493 }
1494 mutex_unlock(&bp->hwrm_cmd_lock);
1495
1496 if (rc)
1497 rc = -EIO;
1498 return rc;
1499 }
1500
1501 /* Add val to accum while handling a possible wraparound
1502 * of val. Eventhough val is of type u64, its actual width
1503 * is denoted by mask and will wrap-around beyond that width.
1504 */
1505 static void accumulate_val(u64 *accum, u64 val, u64 mask)
1506 {
1507 #define low_bits(x, mask) ((x) & (mask))
1508 #define high_bits(x, mask) ((x) & ~(mask))
1509 bool wrapped = val < low_bits(*accum, mask);
1510
1511 *accum = high_bits(*accum, mask) + val;
1512 if (wrapped)
1513 *accum += (mask + 1);
1514 }
1515
1516 /* The HW counters' width is much less than 64bits.
1517 * Handle possible wrap-around while updating the stat counters
1518 */
1519 static void bnxt_flow_stats_accum(struct bnxt_tc_info *tc_info,
1520 struct bnxt_tc_flow_stats *acc_stats,
1521 struct bnxt_tc_flow_stats *hw_stats)
1522 {
1523 accumulate_val(&acc_stats->bytes, hw_stats->bytes, tc_info->bytes_mask);
1524 accumulate_val(&acc_stats->packets, hw_stats->packets,
1525 tc_info->packets_mask);
1526 }
1527
1528 static int
1529 bnxt_tc_flow_stats_batch_update(struct bnxt *bp, int num_flows,
1530 struct bnxt_tc_stats_batch stats_batch[])
1531 {
1532 struct bnxt_tc_info *tc_info = bp->tc_info;
1533 int rc, i;
1534
1535 rc = bnxt_hwrm_cfa_flow_stats_get(bp, num_flows, stats_batch);
1536 if (rc)
1537 return rc;
1538
1539 for (i = 0; i < num_flows; i++) {
1540 struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node;
1541 struct bnxt_tc_flow *flow = &flow_node->flow;
1542
1543 spin_lock(&flow->stats_lock);
1544 bnxt_flow_stats_accum(tc_info, &flow->stats,
1545 &stats_batch[i].hw_stats);
1546 if (flow->stats.packets != flow->prev_stats.packets)
1547 flow->lastused = jiffies;
1548 spin_unlock(&flow->stats_lock);
1549 }
1550
1551 return 0;
1552 }
1553
1554 static int
1555 bnxt_tc_flow_stats_batch_prep(struct bnxt *bp,
1556 struct bnxt_tc_stats_batch stats_batch[],
1557 int *num_flows)
1558 {
1559 struct bnxt_tc_info *tc_info = bp->tc_info;
1560 struct rhashtable_iter *iter = &tc_info->iter;
1561 void *flow_node;
1562 int rc, i;
1563
1564 rhashtable_walk_start(iter);
1565
1566 rc = 0;
1567 for (i = 0; i < BNXT_FLOW_STATS_BATCH_MAX; i++) {
1568 flow_node = rhashtable_walk_next(iter);
1569 if (IS_ERR(flow_node)) {
1570 i = 0;
1571 if (PTR_ERR(flow_node) == -EAGAIN) {
1572 continue;
1573 } else {
1574 rc = PTR_ERR(flow_node);
1575 goto done;
1576 }
1577 }
1578
1579 /* No more flows */
1580 if (!flow_node)
1581 goto done;
1582
1583 stats_batch[i].flow_node = flow_node;
1584 }
1585 done:
1586 rhashtable_walk_stop(iter);
1587 *num_flows = i;
1588 return rc;
1589 }
1590
1591 void bnxt_tc_flow_stats_work(struct bnxt *bp)
1592 {
1593 struct bnxt_tc_info *tc_info = bp->tc_info;
1594 int num_flows, rc;
1595
1596 num_flows = atomic_read(&tc_info->flow_table.nelems);
1597 if (!num_flows)
1598 return;
1599
1600 rhashtable_walk_enter(&tc_info->flow_table, &tc_info->iter);
1601
1602 for (;;) {
1603 rc = bnxt_tc_flow_stats_batch_prep(bp, tc_info->stats_batch,
1604 &num_flows);
1605 if (rc) {
1606 if (rc == -EAGAIN)
1607 continue;
1608 break;
1609 }
1610
1611 if (!num_flows)
1612 break;
1613
1614 bnxt_tc_flow_stats_batch_update(bp, num_flows,
1615 tc_info->stats_batch);
1616 }
1617
1618 rhashtable_walk_exit(&tc_info->iter);
1619 }
1620
1621 int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
1622 struct tc_cls_flower_offload *cls_flower)
1623 {
1624 switch (cls_flower->command) {
1625 case TC_CLSFLOWER_REPLACE:
1626 return bnxt_tc_add_flow(bp, src_fid, cls_flower);
1627 case TC_CLSFLOWER_DESTROY:
1628 return bnxt_tc_del_flow(bp, cls_flower);
1629 case TC_CLSFLOWER_STATS:
1630 return bnxt_tc_get_flow_stats(bp, cls_flower);
1631 default:
1632 return -EOPNOTSUPP;
1633 }
1634 }
1635
1636 static const struct rhashtable_params bnxt_tc_flow_ht_params = {
1637 .head_offset = offsetof(struct bnxt_tc_flow_node, node),
1638 .key_offset = offsetof(struct bnxt_tc_flow_node, cookie),
1639 .key_len = sizeof(((struct bnxt_tc_flow_node *)0)->cookie),
1640 .automatic_shrinking = true
1641 };
1642
1643 static const struct rhashtable_params bnxt_tc_l2_ht_params = {
1644 .head_offset = offsetof(struct bnxt_tc_l2_node, node),
1645 .key_offset = offsetof(struct bnxt_tc_l2_node, key),
1646 .key_len = BNXT_TC_L2_KEY_LEN,
1647 .automatic_shrinking = true
1648 };
1649
1650 static const struct rhashtable_params bnxt_tc_decap_l2_ht_params = {
1651 .head_offset = offsetof(struct bnxt_tc_l2_node, node),
1652 .key_offset = offsetof(struct bnxt_tc_l2_node, key),
1653 .key_len = BNXT_TC_L2_KEY_LEN,
1654 .automatic_shrinking = true
1655 };
1656
1657 static const struct rhashtable_params bnxt_tc_tunnel_ht_params = {
1658 .head_offset = offsetof(struct bnxt_tc_tunnel_node, node),
1659 .key_offset = offsetof(struct bnxt_tc_tunnel_node, key),
1660 .key_len = sizeof(struct ip_tunnel_key),
1661 .automatic_shrinking = true
1662 };
1663
1664 /* convert counter width in bits to a mask */
1665 #define mask(width) ((u64)~0 >> (64 - (width)))
1666
1667 int bnxt_init_tc(struct bnxt *bp)
1668 {
1669 struct bnxt_tc_info *tc_info;
1670 int rc;
1671
1672 if (bp->hwrm_spec_code < 0x10803) {
1673 netdev_warn(bp->dev,
1674 "Firmware does not support TC flower offload.\n");
1675 return -ENOTSUPP;
1676 }
1677
1678 tc_info = kzalloc(sizeof(*tc_info), GFP_KERNEL);
1679 if (!tc_info)
1680 return -ENOMEM;
1681 mutex_init(&tc_info->lock);
1682
1683 /* Counter widths are programmed by FW */
1684 tc_info->bytes_mask = mask(36);
1685 tc_info->packets_mask = mask(28);
1686
1687 tc_info->flow_ht_params = bnxt_tc_flow_ht_params;
1688 rc = rhashtable_init(&tc_info->flow_table, &tc_info->flow_ht_params);
1689 if (rc)
1690 goto free_tc_info;
1691
1692 tc_info->l2_ht_params = bnxt_tc_l2_ht_params;
1693 rc = rhashtable_init(&tc_info->l2_table, &tc_info->l2_ht_params);
1694 if (rc)
1695 goto destroy_flow_table;
1696
1697 tc_info->decap_l2_ht_params = bnxt_tc_decap_l2_ht_params;
1698 rc = rhashtable_init(&tc_info->decap_l2_table,
1699 &tc_info->decap_l2_ht_params);
1700 if (rc)
1701 goto destroy_l2_table;
1702
1703 tc_info->decap_ht_params = bnxt_tc_tunnel_ht_params;
1704 rc = rhashtable_init(&tc_info->decap_table,
1705 &tc_info->decap_ht_params);
1706 if (rc)
1707 goto destroy_decap_l2_table;
1708
1709 tc_info->encap_ht_params = bnxt_tc_tunnel_ht_params;
1710 rc = rhashtable_init(&tc_info->encap_table,
1711 &tc_info->encap_ht_params);
1712 if (rc)
1713 goto destroy_decap_table;
1714
1715 tc_info->enabled = true;
1716 bp->dev->hw_features |= NETIF_F_HW_TC;
1717 bp->dev->features |= NETIF_F_HW_TC;
1718 bp->tc_info = tc_info;
1719 return 0;
1720
1721 destroy_decap_table:
1722 rhashtable_destroy(&tc_info->decap_table);
1723 destroy_decap_l2_table:
1724 rhashtable_destroy(&tc_info->decap_l2_table);
1725 destroy_l2_table:
1726 rhashtable_destroy(&tc_info->l2_table);
1727 destroy_flow_table:
1728 rhashtable_destroy(&tc_info->flow_table);
1729 free_tc_info:
1730 kfree(tc_info);
1731 return rc;
1732 }
1733
1734 void bnxt_shutdown_tc(struct bnxt *bp)
1735 {
1736 struct bnxt_tc_info *tc_info = bp->tc_info;
1737
1738 if (!bnxt_tc_flower_enabled(bp))
1739 return;
1740
1741 rhashtable_destroy(&tc_info->flow_table);
1742 rhashtable_destroy(&tc_info->l2_table);
1743 rhashtable_destroy(&tc_info->decap_l2_table);
1744 rhashtable_destroy(&tc_info->decap_table);
1745 rhashtable_destroy(&tc_info->encap_table);
1746 kfree(tc_info);
1747 bp->tc_info = NULL;
1748 }
A mirror of Linus' kernel repository