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Merge tag 'scmi-fixes-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep...
[linux-2.6-block.git] / drivers / net / ethernet / broadcom / bnxt / bnxt_tc.c
CommitLineData
2ae7408f
SP		 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>
8c95f773 19#include <net/tc_act/tc_tunnel_key.h>
2ae7408f
SP		 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
2ae7408f
SP		 27#define BNXT_FID_INVALID 0xffff
28#define VLAN_TCI(vid, prio) ((vid) | ((prio) << VLAN_PRIO_SHIFT))
29
e32d4e60
VD		 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
2ae7408f
SP		 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 */
43static 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 */
52d5254a 48 if (!netdev_port_same_parent_id(pf_bp->dev, dev)) {
2ae7408f
SP		 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? */
dd4ea1da 55 if (bnxt_dev_is_vf_rep(dev))
2ae7408f
SP		 56 return bnxt_vf_rep_get_fid(dev);
57
58 bp = netdev_priv(dev);
59 return bp->pf.fw_fid;
60}
61
62static int bnxt_tc_parse_redir(struct bnxt *bp,
63 struct bnxt_tc_actions *actions,
73867881 64 const struct flow_action_entry *act)
2ae7408f 65{
73867881 66 struct net_device *dev = act->dev;
2ae7408f 67
2ae7408f 68 if (!dev) {
9f8a739e 69 netdev_info(bp->dev, "no dev in mirred action");
2ae7408f
SP		 70 return -EINVAL;
71 }
72
2ae7408f 73 actions->flags |= BNXT_TC_ACTION_FLAG_FWD;
2ae7408f
SP		 74 actions->dst_dev = dev;
75 return 0;
76}
77
8c6ec361
DC		 78static int bnxt_tc_parse_vlan(struct bnxt *bp,
79 struct bnxt_tc_actions *actions,
73867881 80 const struct flow_action_entry *act)
2ae7408f 81{
73867881
PNA		 82 switch (act->id) {
83 case FLOW_ACTION_VLAN_POP:
2ae7408f 84 actions->flags |= BNXT_TC_ACTION_FLAG_POP_VLAN;
8c6ec361 85 break;
73867881 86 case FLOW_ACTION_VLAN_PUSH:
2ae7408f 87 actions->flags |= BNXT_TC_ACTION_FLAG_PUSH_VLAN;
73867881
PNA		 88 actions->push_vlan_tci = htons(act->vlan.vid);
89 actions->push_vlan_tpid = act->vlan.proto;
8c6ec361
DC		 90 break;
91 default:
92 return -EOPNOTSUPP;
2ae7408f 93 }
8c6ec361 94 return 0;
2ae7408f
SP		 95}
96
8c95f773
SP		 97static int bnxt_tc_parse_tunnel_set(struct bnxt *bp,
98 struct bnxt_tc_actions *actions,
73867881 99 const struct flow_action_entry *act)
8c95f773 100{
73867881
PNA		 101 const struct ip_tunnel_info *tun_info = act->tunnel;
102 const struct ip_tunnel_key *tun_key = &tun_info->key;
8c95f773
SP		 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
2ae7408f
SP		 114static int bnxt_tc_parse_actions(struct bnxt *bp,
115 struct bnxt_tc_actions *actions,
73867881 116 struct flow_action *flow_action)
2ae7408f 117{
73867881 118 struct flow_action_entry *act;
244cd96a 119 int i, rc;
2ae7408f 120
73867881 121 if (!flow_action_has_entries(flow_action)) {
2ae7408f
SP		 122 netdev_info(bp->dev, "no actions");
123 return -EINVAL;
124 }
125
73867881
PNA		 126 flow_action_for_each(i, act, flow_action) {
127 switch (act->id) {
128 case FLOW_ACTION_DROP:
2ae7408f
SP		 129 actions->flags |= BNXT_TC_ACTION_FLAG_DROP;
130 return 0; /* don't bother with other actions */
73867881
PNA		 131 case FLOW_ACTION_REDIRECT:
132 rc = bnxt_tc_parse_redir(bp, actions, act);
2ae7408f
SP		 133 if (rc)
134 return rc;
73867881
PNA		 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);
8c6ec361
DC		 140 if (rc)
141 return rc;
73867881
PNA		 142 break;
143 case FLOW_ACTION_TUNNEL_ENCAP:
144 rc = bnxt_tc_parse_tunnel_set(bp, actions, act);
8c95f773
SP		 145 if (rc)
146 return rc;
73867881
PNA		 147 break;
148 case FLOW_ACTION_TUNNEL_DECAP:
8c95f773 149 actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_DECAP;
73867881
PNA		 150 break;
151 default:
152 break;
8c95f773 153 }
2ae7408f
SP		 154 }
155
e9ecc731
SP		 156 if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
157 if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
158 /* dst_fid is PF's fid */
159 actions->dst_fid = bp->pf.fw_fid;
160 } else {
161 /* find the FID from dst_dev */
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 }
8c95f773
SP		 167 }
168
92425c40 169 return 0;
2ae7408f
SP		 170}
171
2ae7408f 172static int bnxt_tc_parse_flow(struct bnxt *bp,
f9e30088 173 struct flow_cls_offload *tc_flow_cmd,
2ae7408f
SP		 174 struct bnxt_tc_flow *flow)
175{
f9e30088 176 struct flow_rule *rule = flow_cls_offload_flow_rule(tc_flow_cmd);
8f256622 177 struct flow_dissector *dissector = rule->match.dissector;
2ae7408f
SP		 178
179 /* KEY_CONTROL and KEY_BASIC are needed for forming a meaningful key */
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
8f256622
PNA		 187 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
188 struct flow_match_basic match;
2ae7408f 189
8f256622
PNA		 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;
2ae7408f 193
8f256622
PNA		 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;
2ae7408f
SP		 198 }
199 }
200
8f256622
PNA		 201 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
202 struct flow_match_eth_addrs match;
2ae7408f 203
8f256622 204 flow_rule_match_eth_addrs(rule, &match);
2ae7408f 205 flow->flags |= BNXT_TC_FLOW_FLAGS_ETH_ADDRS;
8f256622
PNA		 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);
2ae7408f
SP		 210 }
211
8f256622
PNA		 212 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
213 struct flow_match_vlan match;
2ae7408f 214
8f256622 215 flow_rule_match_vlan(rule, &match);
2ae7408f 216 flow->l2_key.inner_vlan_tci =
8f256622
PNA		 217 cpu_to_be16(VLAN_TCI(match.key->vlan_id,
218 match.key->vlan_priority));
2ae7408f 219 flow->l2_mask.inner_vlan_tci =
8f256622
PNA		 220 cpu_to_be16((VLAN_TCI(match.mask->vlan_id,
221 match.mask->vlan_priority)));
2ae7408f
SP		 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
8f256622
PNA		 227 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) {
228 struct flow_match_ipv4_addrs match;
2ae7408f 229
8f256622 230 flow_rule_match_ipv4_addrs(rule, &match);
2ae7408f 231 flow->flags |= BNXT_TC_FLOW_FLAGS_IPV4_ADDRS;
8f256622
PNA		 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);
2ae7408f 240 flow->flags |= BNXT_TC_FLOW_FLAGS_IPV6_ADDRS;
8f256622
PNA		 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;
2ae7408f
SP		 245 }
246
8f256622
PNA		 247 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) {
248 struct flow_match_ports match;
2ae7408f 249
8f256622 250 flow_rule_match_ports(rule, &match);
2ae7408f 251 flow->flags |= BNXT_TC_FLOW_FLAGS_PORTS;
8f256622
PNA		 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;
2ae7408f
SP		 256 }
257
8f256622
PNA		 258 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP)) {
259 struct flow_match_icmp match;
2ae7408f 260
8f256622 261 flow_rule_match_icmp(rule, &match);
2ae7408f 262 flow->flags |= BNXT_TC_FLOW_FLAGS_ICMP;
8f256622
PNA		 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;
2ae7408f
SP		 267 }
268
8f256622
PNA		 269 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
270 struct flow_match_ipv4_addrs match;
8c95f773 271
8f256622 272 flow_rule_match_enc_ipv4_addrs(rule, &match);
8c95f773 273 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS;
8f256622
PNA		 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,
8c95f773
SP		 279 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS)) {
280 return -EOPNOTSUPP;
281 }
282
8f256622
PNA		 283 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
284 struct flow_match_enc_keyid match;
8c95f773 285
8f256622 286 flow_rule_match_enc_keyid(rule, &match);
8c95f773 287 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ID;
8f256622
PNA		 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);
8c95f773
SP		 290 }
291
8f256622
PNA		 292 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
293 struct flow_match_ports match;
8c95f773 294
8f256622 295 flow_rule_match_enc_ports(rule, &match);
8c95f773 296 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_PORTS;
8f256622
PNA		 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;
8c95f773
SP		 301 }
302
73867881 303 return bnxt_tc_parse_actions(bp, &flow->actions, &rule->action);
2ae7408f
SP		 304}
305
abd43a13
VD		 306static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp,
307 struct bnxt_tc_flow_node *flow_node)
2ae7408f 308{
db1d36a2
SP		 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);
abd43a13
VD		 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;
db1d36a2
SP		 317
318 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
319 if (rc)
abd43a13 320 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
6ae777ea
VD		 321
322 if (rc)
323 rc = -EIO;
db1d36a2
SP		 324 return rc;
325}
326
327static int ipv6_mask_len(struct in6_addr *mask)
328{
329 int mask_len = 0, i;
330
331 for (i = 0; i < 4; i++)
332 mask_len += inet_mask_len(mask->s6_addr32[i]);
333
334 return mask_len;
335}
336
337static bool is_wildcard(void *mask, int len)
338{
339 const u8 *p = mask;
340 int i;
341
342 for (i = 0; i < len; i++) {
343 if (p[i] != 0)
344 return false;
345 }
346 return true;
2ae7408f
SP		 347}
348
e85a9be9
AG		 349static bool is_exactmatch(void *mask, int len)
350{
351 const u8 *p = mask;
352 int i;
353
354 for (i = 0; i < len; i++)
355 if (p[i] != 0xff)
356 return false;
357
358 return true;
359}
360
e32d4e60
VD		 361static bool is_vlan_tci_allowed(__be16 vlan_tci_mask,
362 __be16 vlan_tci)
363{
364 /* VLAN priority must be either exactly zero or fully wildcarded and
365 * VLAN id must be exact match.
366 */
367 if (is_vid_exactmatch(vlan_tci_mask) &&
368 ((is_vlan_pcp_exactmatch(vlan_tci_mask) &&
369 is_vlan_pcp_zero(vlan_tci)) ||
370 is_vlan_pcp_wildcarded(vlan_tci_mask)))
371 return true;
372
373 return false;
374}
375
e85a9be9
AG		 376static bool bits_set(void *key, int len)
377{
378 const u8 *p = key;
379 int i;
380
381 for (i = 0; i < len; i++)
382 if (p[i] != 0)
383 return true;
384
385 return false;
386}
387
2ae7408f 388static int bnxt_hwrm_cfa_flow_alloc(struct bnxt *bp, struct bnxt_tc_flow *flow,
8c95f773 389 __le16 ref_flow_handle,
abd43a13
VD		 390 __le32 tunnel_handle,
391 struct bnxt_tc_flow_node *flow_node)
2ae7408f 392{
db1d36a2
SP		 393 struct bnxt_tc_actions *actions = &flow->actions;
394 struct bnxt_tc_l3_key *l3_mask = &flow->l3_mask;
395 struct bnxt_tc_l3_key *l3_key = &flow->l3_key;
396 struct hwrm_cfa_flow_alloc_input req = { 0 };
5c209fc8 397 struct hwrm_cfa_flow_alloc_output *resp;
db1d36a2
SP		 398 u16 flow_flags = 0, action_flags = 0;
399 int rc;
400
401 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_ALLOC, -1, -1);
402
403 req.src_fid = cpu_to_le16(flow->src_fid);
404 req.ref_flow_handle = ref_flow_handle;
8c95f773
SP		 405
406 if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP ||
407 actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) {
408 req.tunnel_handle = tunnel_handle;
409 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_TUNNEL;
410 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_TUNNEL;
411 }
412
db1d36a2
SP		 413 req.ethertype = flow->l2_key.ether_type;
414 req.ip_proto = flow->l4_key.ip_proto;
415
416 if (flow->flags & BNXT_TC_FLOW_FLAGS_ETH_ADDRS) {
417 memcpy(req.dmac, flow->l2_key.dmac, ETH_ALEN);
418 memcpy(req.smac, flow->l2_key.smac, ETH_ALEN);
419 }
420
421 if (flow->l2_key.num_vlans > 0) {
422 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_NUM_VLAN_ONE;
423 /* FW expects the inner_vlan_tci value to be set
424 * in outer_vlan_tci when num_vlans is 1 (which is
425 * always the case in TC.)
426 */
427 req.outer_vlan_tci = flow->l2_key.inner_vlan_tci;
428 }
429
430 /* If all IP and L4 fields are wildcarded then this is an L2 flow */
7deea450 431 if (is_wildcard(l3_mask, sizeof(*l3_mask)) &&
db1d36a2
SP		 432 is_wildcard(&flow->l4_mask, sizeof(flow->l4_mask))) {
433 flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_L2;
434 } else {
435 flow_flags |= flow->l2_key.ether_type == htons(ETH_P_IP) ?
436 CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV4 :
437 CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV6;
438
439 if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV4_ADDRS) {
440 req.ip_dst[0] = l3_key->ipv4.daddr.s_addr;
441 req.ip_dst_mask_len =
442 inet_mask_len(l3_mask->ipv4.daddr.s_addr);
443 req.ip_src[0] = l3_key->ipv4.saddr.s_addr;
444 req.ip_src_mask_len =
445 inet_mask_len(l3_mask->ipv4.saddr.s_addr);
446 } else if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV6_ADDRS) {
447 memcpy(req.ip_dst, l3_key->ipv6.daddr.s6_addr32,
448 sizeof(req.ip_dst));
449 req.ip_dst_mask_len =
450 ipv6_mask_len(&l3_mask->ipv6.daddr);
451 memcpy(req.ip_src, l3_key->ipv6.saddr.s6_addr32,
452 sizeof(req.ip_src));
453 req.ip_src_mask_len =
454 ipv6_mask_len(&l3_mask->ipv6.saddr);
455 }
456 }
457
458 if (flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) {
459 req.l4_src_port = flow->l4_key.ports.sport;
460 req.l4_src_port_mask = flow->l4_mask.ports.sport;
461 req.l4_dst_port = flow->l4_key.ports.dport;
462 req.l4_dst_port_mask = flow->l4_mask.ports.dport;
463 } else if (flow->flags & BNXT_TC_FLOW_FLAGS_ICMP) {
464 /* l4 ports serve as type/code when ip_proto is ICMP */
465 req.l4_src_port = htons(flow->l4_key.icmp.type);
466 req.l4_src_port_mask = htons(flow->l4_mask.icmp.type);
467 req.l4_dst_port = htons(flow->l4_key.icmp.code);
468 req.l4_dst_port_mask = htons(flow->l4_mask.icmp.code);
469 }
470 req.flags = cpu_to_le16(flow_flags);
471
472 if (actions->flags & BNXT_TC_ACTION_FLAG_DROP) {
473 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_DROP;
474 } else {
475 if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) {
476 action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_FWD;
477 req.dst_fid = cpu_to_le16(actions->dst_fid);
478 }
479 if (actions->flags & BNXT_TC_ACTION_FLAG_PUSH_VLAN) {
480 action_flags |=
481 CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
482 req.l2_rewrite_vlan_tpid = actions->push_vlan_tpid;
483 req.l2_rewrite_vlan_tci = actions->push_vlan_tci;
484 memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN);
485 memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN);
486 }
487 if (actions->flags & BNXT_TC_ACTION_FLAG_POP_VLAN) {
488 action_flags |=
489 CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE;
490 /* Rewrite config with tpid = 0 implies vlan pop */
491 req.l2_rewrite_vlan_tpid = 0;
492 memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN);
493 memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN);
494 }
495 }
496 req.action_flags = cpu_to_le16(action_flags);
497
498 mutex_lock(&bp->hwrm_cmd_lock);
db1d36a2 499 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
5c209fc8
VD		 500 if (!rc) {
501 resp = bnxt_get_hwrm_resp_addr(bp, &req);
abd43a13
VD		 502 /* CFA_FLOW_ALLOC response interpretation:
503 * fw with fw with
504 * 16-bit 64-bit
505 * flow handle flow handle
506 * =========== ===========
507 * flow_handle flow handle flow context id
508 * ext_flow_handle INVALID flow handle
509 * flow_id INVALID flow counter id
510 */
511 flow_node->flow_handle = resp->flow_handle;
512 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) {
513 flow_node->ext_flow_handle = resp->ext_flow_handle;
514 flow_node->flow_id = resp->flow_id;
515 }
5c209fc8 516 }
db1d36a2
SP		 517 mutex_unlock(&bp->hwrm_cmd_lock);
518
6ae777ea
VD		 519 if (rc == HWRM_ERR_CODE_RESOURCE_ALLOC_ERROR)
520 rc = -ENOSPC;
521 else if (rc)
522 rc = -EIO;
db1d36a2 523 return rc;
2ae7408f
SP		 524}
525
8c95f773
SP		 526static int hwrm_cfa_decap_filter_alloc(struct bnxt *bp,
527 struct bnxt_tc_flow *flow,
528 struct bnxt_tc_l2_key *l2_info,
529 __le32 ref_decap_handle,
530 __le32 *decap_filter_handle)
531{
f484f678 532 struct hwrm_cfa_decap_filter_alloc_input req = { 0 };
5c209fc8 533 struct hwrm_cfa_decap_filter_alloc_output *resp;
f484f678
SP		 534 struct ip_tunnel_key *tun_key = &flow->tun_key;
535 u32 enables = 0;
536 int rc;
537
538 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_ALLOC, -1, -1);
539
540 req.flags = cpu_to_le32(CFA_DECAP_FILTER_ALLOC_REQ_FLAGS_OVS_TUNNEL);
541 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_TYPE |
542 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IP_PROTOCOL;
543 req.tunnel_type = CFA_DECAP_FILTER_ALLOC_REQ_TUNNEL_TYPE_VXLAN;
544 req.ip_protocol = CFA_DECAP_FILTER_ALLOC_REQ_IP_PROTOCOL_UDP;
545
546 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ID) {
547 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_ID;
548 /* tunnel_id is wrongly defined in hsi defn. as __le32 */
549 req.tunnel_id = tunnel_id_to_key32(tun_key->tun_id);
550 }
551
552 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS) {
c8fb7b82 553 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_MACADDR;
f484f678 554 ether_addr_copy(req.dst_macaddr, l2_info->dmac);
f484f678
SP		 555 }
556 if (l2_info->num_vlans) {
557 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_T_IVLAN_VID;
558 req.t_ivlan_vid = l2_info->inner_vlan_tci;
559 }
560
561 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_ETHERTYPE;
562 req.ethertype = htons(ETH_P_IP);
563
564 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS) {
565 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_SRC_IPADDR |
566 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_IPADDR |
567 CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IPADDR_TYPE;
568 req.ip_addr_type = CFA_DECAP_FILTER_ALLOC_REQ_IP_ADDR_TYPE_IPV4;
569 req.dst_ipaddr[0] = tun_key->u.ipv4.dst;
570 req.src_ipaddr[0] = tun_key->u.ipv4.src;
571 }
572
573 if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_PORTS) {
574 enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_PORT;
575 req.dst_port = tun_key->tp_dst;
576 }
577
578 /* Eventhough the decap_handle returned by hwrm_cfa_decap_filter_alloc
579 * is defined as __le32, l2_ctxt_ref_id is defined in HSI as __le16.
580 */
581 req.l2_ctxt_ref_id = (__force __le16)ref_decap_handle;
582 req.enables = cpu_to_le32(enables);
583
584 mutex_lock(&bp->hwrm_cmd_lock);
585 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
5c209fc8
VD		 586 if (!rc) {
587 resp = bnxt_get_hwrm_resp_addr(bp, &req);
f484f678 588 *decap_filter_handle = resp->decap_filter_id;
5c209fc8 589 } else {
f484f678 590 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
5c209fc8 591 }
f484f678
SP		 592 mutex_unlock(&bp->hwrm_cmd_lock);
593
6ae777ea
VD		 594 if (rc)
595 rc = -EIO;
f484f678 596 return rc;
8c95f773
SP		 597}
598
599static int hwrm_cfa_decap_filter_free(struct bnxt *bp,
600 __le32 decap_filter_handle)
601{
f484f678
SP		 602 struct hwrm_cfa_decap_filter_free_input req = { 0 };
603 int rc;
604
605 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_FREE, -1, -1);
606 req.decap_filter_id = decap_filter_handle;
607
608 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
609 if (rc)
610 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
6ae777ea
VD		 611
612 if (rc)
613 rc = -EIO;
f484f678 614 return rc;
8c95f773
SP		 615}
616
617static int hwrm_cfa_encap_record_alloc(struct bnxt *bp,
618 struct ip_tunnel_key *encap_key,
619 struct bnxt_tc_l2_key *l2_info,
620 __le32 *encap_record_handle)
621{
f484f678 622 struct hwrm_cfa_encap_record_alloc_input req = { 0 };
5c209fc8 623 struct hwrm_cfa_encap_record_alloc_output *resp;
f484f678
SP		 624 struct hwrm_cfa_encap_data_vxlan *encap =
625 (struct hwrm_cfa_encap_data_vxlan *)&req.encap_data;
626 struct hwrm_vxlan_ipv4_hdr *encap_ipv4 =
627 (struct hwrm_vxlan_ipv4_hdr *)encap->l3;
628 int rc;
629
630 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_ALLOC, -1, -1);
631
632 req.encap_type = CFA_ENCAP_RECORD_ALLOC_REQ_ENCAP_TYPE_VXLAN;
633
634 ether_addr_copy(encap->dst_mac_addr, l2_info->dmac);
635 ether_addr_copy(encap->src_mac_addr, l2_info->smac);
636 if (l2_info->num_vlans) {
637 encap->num_vlan_tags = l2_info->num_vlans;
638 encap->ovlan_tci = l2_info->inner_vlan_tci;
639 encap->ovlan_tpid = l2_info->inner_vlan_tpid;
640 }
641
642 encap_ipv4->ver_hlen = 4 << VXLAN_IPV4_HDR_VER_HLEN_VERSION_SFT;
643 encap_ipv4->ver_hlen |= 5 << VXLAN_IPV4_HDR_VER_HLEN_HEADER_LENGTH_SFT;
644 encap_ipv4->ttl = encap_key->ttl;
645
646 encap_ipv4->dest_ip_addr = encap_key->u.ipv4.dst;
647 encap_ipv4->src_ip_addr = encap_key->u.ipv4.src;
648 encap_ipv4->protocol = IPPROTO_UDP;
649
650 encap->dst_port = encap_key->tp_dst;
651 encap->vni = tunnel_id_to_key32(encap_key->tun_id);
652
653 mutex_lock(&bp->hwrm_cmd_lock);
654 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
5c209fc8
VD		 655 if (!rc) {
656 resp = bnxt_get_hwrm_resp_addr(bp, &req);
f484f678 657 *encap_record_handle = resp->encap_record_id;
5c209fc8 658 } else {
f484f678 659 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
5c209fc8 660 }
f484f678
SP		 661 mutex_unlock(&bp->hwrm_cmd_lock);
662
6ae777ea
VD		 663 if (rc)
664 rc = -EIO;
f484f678 665 return rc;
8c95f773
SP		 666}
667
668static int hwrm_cfa_encap_record_free(struct bnxt *bp,
669 __le32 encap_record_handle)
670{
f484f678
SP		 671 struct hwrm_cfa_encap_record_free_input req = { 0 };
672 int rc;
673
674 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_FREE, -1, -1);
675 req.encap_record_id = encap_record_handle;
676
677 rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
678 if (rc)
679 netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc);
6ae777ea
VD		 680
681 if (rc)
682 rc = -EIO;
f484f678 683 return rc;
8c95f773
SP		 684}
685
2ae7408f
SP		 686static int bnxt_tc_put_l2_node(struct bnxt *bp,
687 struct bnxt_tc_flow_node *flow_node)
688{
689 struct bnxt_tc_l2_node *l2_node = flow_node->l2_node;
cd66358e 690 struct bnxt_tc_info *tc_info = bp->tc_info;
2ae7408f
SP		 691 int rc;
692
693 /* remove flow_node from the L2 shared flow list */
694 list_del(&flow_node->l2_list_node);
695 if (--l2_node->refcount == 0) {
696 rc = rhashtable_remove_fast(&tc_info->l2_table, &l2_node->node,
697 tc_info->l2_ht_params);
698 if (rc)
699 netdev_err(bp->dev,
700 "Error: %s: rhashtable_remove_fast: %d",
701 __func__, rc);
702 kfree_rcu(l2_node, rcu);
703 }
704 return 0;
705}
706
707static struct bnxt_tc_l2_node *
708bnxt_tc_get_l2_node(struct bnxt *bp, struct rhashtable *l2_table,
709 struct rhashtable_params ht_params,
710 struct bnxt_tc_l2_key *l2_key)
711{
712 struct bnxt_tc_l2_node *l2_node;
713 int rc;
714
715 l2_node = rhashtable_lookup_fast(l2_table, l2_key, ht_params);
716 if (!l2_node) {
717 l2_node = kzalloc(sizeof(*l2_node), GFP_KERNEL);
718 if (!l2_node) {
719 rc = -ENOMEM;
720 return NULL;
721 }
722
723 l2_node->key = *l2_key;
724 rc = rhashtable_insert_fast(l2_table, &l2_node->node,
725 ht_params);
726 if (rc) {
8c95f773 727 kfree_rcu(l2_node, rcu);
2ae7408f
SP		 728 netdev_err(bp->dev,
729 "Error: %s: rhashtable_insert_fast: %d",
730 __func__, rc);
731 return NULL;
732 }
733 INIT_LIST_HEAD(&l2_node->common_l2_flows);
734 }
735 return l2_node;
736}
737
738/* Get the ref_flow_handle for a flow by checking if there are any other
739 * flows that share the same L2 key as this flow.
740 */
741static int
742bnxt_tc_get_ref_flow_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
743 struct bnxt_tc_flow_node *flow_node,
744 __le16 *ref_flow_handle)
745{
cd66358e 746 struct bnxt_tc_info *tc_info = bp->tc_info;
2ae7408f
SP		 747 struct bnxt_tc_flow_node *ref_flow_node;
748 struct bnxt_tc_l2_node *l2_node;
749
750 l2_node = bnxt_tc_get_l2_node(bp, &tc_info->l2_table,
751 tc_info->l2_ht_params,
752 &flow->l2_key);
753 if (!l2_node)
754 return -1;
755
756 /* If any other flow is using this l2_node, use it's flow_handle
757 * as the ref_flow_handle
758 */
759 if (l2_node->refcount > 0) {
760 ref_flow_node = list_first_entry(&l2_node->common_l2_flows,
761 struct bnxt_tc_flow_node,
762 l2_list_node);
763 *ref_flow_handle = ref_flow_node->flow_handle;
764 } else {
765 *ref_flow_handle = cpu_to_le16(0xffff);
766 }
767
768 /* Insert the l2_node into the flow_node so that subsequent flows
769 * with a matching l2 key can use the flow_handle of this flow
770 * as their ref_flow_handle
771 */
772 flow_node->l2_node = l2_node;
773 list_add(&flow_node->l2_list_node, &l2_node->common_l2_flows);
774 l2_node->refcount++;
775 return 0;
776}
777
778/* After the flow parsing is done, this routine is used for checking
779 * if there are any aspects of the flow that prevent it from being
780 * offloaded.
781 */
782static bool bnxt_tc_can_offload(struct bnxt *bp, struct bnxt_tc_flow *flow)
783{
784 /* If L4 ports are specified then ip_proto must be TCP or UDP */
785 if ((flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) &&
786 (flow->l4_key.ip_proto != IPPROTO_TCP &&
787 flow->l4_key.ip_proto != IPPROTO_UDP)) {
788 netdev_info(bp->dev, "Cannot offload non-TCP/UDP (%d) ports",
789 flow->l4_key.ip_proto);
790 return false;
791 }
792
e85a9be9
AG		 793 /* Currently source/dest MAC cannot be partial wildcard */
794 if (bits_set(&flow->l2_key.smac, sizeof(flow->l2_key.smac)) &&
795 !is_exactmatch(flow->l2_mask.smac, sizeof(flow->l2_mask.smac))) {
796 netdev_info(bp->dev, "Wildcard match unsupported for Source MAC\n");
797 return false;
798 }
799 if (bits_set(&flow->l2_key.dmac, sizeof(flow->l2_key.dmac)) &&
800 !is_exactmatch(&flow->l2_mask.dmac, sizeof(flow->l2_mask.dmac))) {
801 netdev_info(bp->dev, "Wildcard match unsupported for Dest MAC\n");
802 return false;
803 }
804
805 /* Currently VLAN fields cannot be partial wildcard */
806 if (bits_set(&flow->l2_key.inner_vlan_tci,
807 sizeof(flow->l2_key.inner_vlan_tci)) &&
e32d4e60
VD		 808 !is_vlan_tci_allowed(flow->l2_mask.inner_vlan_tci,
809 flow->l2_key.inner_vlan_tci)) {
810 netdev_info(bp->dev, "Unsupported VLAN TCI\n");
e85a9be9
AG		 811 return false;
812 }
813 if (bits_set(&flow->l2_key.inner_vlan_tpid,
814 sizeof(flow->l2_key.inner_vlan_tpid)) &&
815 !is_exactmatch(&flow->l2_mask.inner_vlan_tpid,
816 sizeof(flow->l2_mask.inner_vlan_tpid))) {
817 netdev_info(bp->dev, "Wildcard match unsupported for VLAN TPID\n");
818 return false;
819 }
820
821 /* Currently Ethertype must be set */
822 if (!is_exactmatch(&flow->l2_mask.ether_type,
823 sizeof(flow->l2_mask.ether_type))) {
824 netdev_info(bp->dev, "Wildcard match unsupported for Ethertype\n");
825 return false;
826 }
827
2ae7408f
SP		 828 return true;
829}
830
8c95f773
SP		 831/* Returns the final refcount of the node on success
832 * or a -ve error code on failure
833 */
834static int bnxt_tc_put_tunnel_node(struct bnxt *bp,
835 struct rhashtable *tunnel_table,
836 struct rhashtable_params *ht_params,
837 struct bnxt_tc_tunnel_node *tunnel_node)
838{
839 int rc;
840
841 if (--tunnel_node->refcount == 0) {
842 rc = rhashtable_remove_fast(tunnel_table, &tunnel_node->node,
843 *ht_params);
844 if (rc) {
845 netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc);
846 rc = -1;
847 }
848 kfree_rcu(tunnel_node, rcu);
849 return rc;
850 } else {
851 return tunnel_node->refcount;
852 }
853}
854
855/* Get (or add) either encap or decap tunnel node from/to the supplied
856 * hash table.
857 */
858static struct bnxt_tc_tunnel_node *
859bnxt_tc_get_tunnel_node(struct bnxt *bp, struct rhashtable *tunnel_table,
860 struct rhashtable_params *ht_params,
861 struct ip_tunnel_key *tun_key)
862{
863 struct bnxt_tc_tunnel_node *tunnel_node;
864 int rc;
865
866 tunnel_node = rhashtable_lookup_fast(tunnel_table, tun_key, *ht_params);
867 if (!tunnel_node) {
868 tunnel_node = kzalloc(sizeof(*tunnel_node), GFP_KERNEL);
869 if (!tunnel_node) {
870 rc = -ENOMEM;
871 goto err;
872 }
873
874 tunnel_node->key = *tun_key;
875 tunnel_node->tunnel_handle = INVALID_TUNNEL_HANDLE;
876 rc = rhashtable_insert_fast(tunnel_table, &tunnel_node->node,
877 *ht_params);
878 if (rc) {
879 kfree_rcu(tunnel_node, rcu);
880 goto err;
881 }
882 }
883 tunnel_node->refcount++;
884 return tunnel_node;
885err:
886 netdev_info(bp->dev, "error rc=%d", rc);
887 return NULL;
888}
889
890static int bnxt_tc_get_ref_decap_handle(struct bnxt *bp,
891 struct bnxt_tc_flow *flow,
892 struct bnxt_tc_l2_key *l2_key,
893 struct bnxt_tc_flow_node *flow_node,
894 __le32 *ref_decap_handle)
895{
cd66358e 896 struct bnxt_tc_info *tc_info = bp->tc_info;
8c95f773
SP		 897 struct bnxt_tc_flow_node *ref_flow_node;
898 struct bnxt_tc_l2_node *decap_l2_node;
899
900 decap_l2_node = bnxt_tc_get_l2_node(bp, &tc_info->decap_l2_table,
901 tc_info->decap_l2_ht_params,
902 l2_key);
903 if (!decap_l2_node)
904 return -1;
905
906 /* If any other flow is using this decap_l2_node, use it's decap_handle
907 * as the ref_decap_handle
908 */
909 if (decap_l2_node->refcount > 0) {
910 ref_flow_node =
911 list_first_entry(&decap_l2_node->common_l2_flows,
912 struct bnxt_tc_flow_node,
913 decap_l2_list_node);
914 *ref_decap_handle = ref_flow_node->decap_node->tunnel_handle;
915 } else {
916 *ref_decap_handle = INVALID_TUNNEL_HANDLE;
917 }
918
919 /* Insert the l2_node into the flow_node so that subsequent flows
920 * with a matching decap l2 key can use the decap_filter_handle of
921 * this flow as their ref_decap_handle
922 */
923 flow_node->decap_l2_node = decap_l2_node;
924 list_add(&flow_node->decap_l2_list_node,
925 &decap_l2_node->common_l2_flows);
926 decap_l2_node->refcount++;
927 return 0;
928}
929
930static void bnxt_tc_put_decap_l2_node(struct bnxt *bp,
931 struct bnxt_tc_flow_node *flow_node)
932{
933 struct bnxt_tc_l2_node *decap_l2_node = flow_node->decap_l2_node;
cd66358e 934 struct bnxt_tc_info *tc_info = bp->tc_info;
8c95f773
SP		 935 int rc;
936
937 /* remove flow_node from the decap L2 sharing flow list */
938 list_del(&flow_node->decap_l2_list_node);
939 if (--decap_l2_node->refcount == 0) {
940 rc = rhashtable_remove_fast(&tc_info->decap_l2_table,
941 &decap_l2_node->node,
942 tc_info->decap_l2_ht_params);
943 if (rc)
944 netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc);
945 kfree_rcu(decap_l2_node, rcu);
946 }
947}
948
949static void bnxt_tc_put_decap_handle(struct bnxt *bp,
950 struct bnxt_tc_flow_node *flow_node)
951{
952 __le32 decap_handle = flow_node->decap_node->tunnel_handle;
cd66358e 953 struct bnxt_tc_info *tc_info = bp->tc_info;
8c95f773
SP		 954 int rc;
955
956 if (flow_node->decap_l2_node)
957 bnxt_tc_put_decap_l2_node(bp, flow_node);
958
959 rc = bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table,
960 &tc_info->decap_ht_params,
961 flow_node->decap_node);
962 if (!rc && decap_handle != INVALID_TUNNEL_HANDLE)
963 hwrm_cfa_decap_filter_free(bp, decap_handle);
964}
965
966static int bnxt_tc_resolve_tunnel_hdrs(struct bnxt *bp,
967 struct ip_tunnel_key *tun_key,
e9ecc731 968 struct bnxt_tc_l2_key *l2_info)
8c95f773 969{
952c5719 970#ifdef CONFIG_INET
e9ecc731 971 struct net_device *real_dst_dev = bp->dev;
8c95f773
SP		 972 struct flowi4 flow = { {0} };
973 struct net_device *dst_dev;
974 struct neighbour *nbr;
975 struct rtable *rt;
976 int rc;
977
978 flow.flowi4_proto = IPPROTO_UDP;
979 flow.fl4_dport = tun_key->tp_dst;
980 flow.daddr = tun_key->u.ipv4.dst;
981
982 rt = ip_route_output_key(dev_net(real_dst_dev), &flow);
983 if (IS_ERR(rt)) {
984 netdev_info(bp->dev, "no route to %pI4b", &flow.daddr);
985 return -EOPNOTSUPP;
986 }
987
988 /* The route must either point to the real_dst_dev or a dst_dev that
989 * uses the real_dst_dev.
990 */
991 dst_dev = rt->dst.dev;
992 if (is_vlan_dev(dst_dev)) {
952c5719 993#if IS_ENABLED(CONFIG_VLAN_8021Q)
8c95f773
SP		 994 struct vlan_dev_priv *vlan = vlan_dev_priv(dst_dev);
995
996 if (vlan->real_dev != real_dst_dev) {
997 netdev_info(bp->dev,
998 "dst_dev(%s) doesn't use PF-if(%s)",
999 netdev_name(dst_dev),
1000 netdev_name(real_dst_dev));
1001 rc = -EOPNOTSUPP;
1002 goto put_rt;
1003 }
1004 l2_info->inner_vlan_tci = htons(vlan->vlan_id);
1005 l2_info->inner_vlan_tpid = vlan->vlan_proto;
1006 l2_info->num_vlans = 1;
952c5719 1007#endif
8c95f773
SP		 1008 } else if (dst_dev != real_dst_dev) {
1009 netdev_info(bp->dev,
1010 "dst_dev(%s) for %pI4b is not PF-if(%s)",
1011 netdev_name(dst_dev), &flow.daddr,
1012 netdev_name(real_dst_dev));
1013 rc = -EOPNOTSUPP;
1014 goto put_rt;
1015 }
1016
1017 nbr = dst_neigh_lookup(&rt->dst, &flow.daddr);
1018 if (!nbr) {
1019 netdev_info(bp->dev, "can't lookup neighbor for %pI4b",
1020 &flow.daddr);
1021 rc = -EOPNOTSUPP;
1022 goto put_rt;
1023 }
1024
1025 tun_key->u.ipv4.src = flow.saddr;
1026 tun_key->ttl = ip4_dst_hoplimit(&rt->dst);
1027 neigh_ha_snapshot(l2_info->dmac, nbr, dst_dev);
1028 ether_addr_copy(l2_info->smac, dst_dev->dev_addr);
1029 neigh_release(nbr);
1030 ip_rt_put(rt);
1031
1032 return 0;
1033put_rt:
1034 ip_rt_put(rt);
1035 return rc;
952c5719
MC		 1036#else
1037 return -EOPNOTSUPP;
1038#endif
8c95f773
SP		 1039}
1040
1041static int bnxt_tc_get_decap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
1042 struct bnxt_tc_flow_node *flow_node,
1043 __le32 *decap_filter_handle)
1044{
1045 struct ip_tunnel_key *decap_key = &flow->tun_key;
cd66358e 1046 struct bnxt_tc_info *tc_info = bp->tc_info;
8c95f773
SP		 1047 struct bnxt_tc_l2_key l2_info = { {0} };
1048 struct bnxt_tc_tunnel_node *decap_node;
1049 struct ip_tunnel_key tun_key = { 0 };
1050 struct bnxt_tc_l2_key *decap_l2_info;
1051 __le32 ref_decap_handle;
1052 int rc;
1053
1054 /* Check if there's another flow using the same tunnel decap.
1055 * If not, add this tunnel to the table and resolve the other
479ca3bf
SB		 1056 * tunnel header fileds. Ignore src_port in the tunnel_key,
1057 * since it is not required for decap filters.
8c95f773 1058 */
479ca3bf 1059 decap_key->tp_src = 0;
8c95f773
SP		 1060 decap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->decap_table,
1061 &tc_info->decap_ht_params,
1062 decap_key);
1063 if (!decap_node)
1064 return -ENOMEM;
1065
1066 flow_node->decap_node = decap_node;
1067
1068 if (decap_node->tunnel_handle != INVALID_TUNNEL_HANDLE)
1069 goto done;
1070
1071 /* Resolve the L2 fields for tunnel decap
1072 * Resolve the route for remote vtep (saddr) of the decap key
1073 * Find it's next-hop mac addrs
1074 */
1075 tun_key.u.ipv4.dst = flow->tun_key.u.ipv4.src;
1076 tun_key.tp_dst = flow->tun_key.tp_dst;
e9ecc731 1077 rc = bnxt_tc_resolve_tunnel_hdrs(bp, &tun_key, &l2_info);
8c95f773
SP		 1078 if (rc)
1079 goto put_decap;
1080
8c95f773 1081 decap_l2_info = &decap_node->l2_info;
c8fb7b82 1082 /* decap smac is wildcarded */
8c95f773 1083 ether_addr_copy(decap_l2_info->dmac, l2_info.smac);
8c95f773
SP		 1084 if (l2_info.num_vlans) {
1085 decap_l2_info->num_vlans = l2_info.num_vlans;
1086 decap_l2_info->inner_vlan_tpid = l2_info.inner_vlan_tpid;
1087 decap_l2_info->inner_vlan_tci = l2_info.inner_vlan_tci;
1088 }
1089 flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS;
1090
1091 /* For getting a decap_filter_handle we first need to check if
1092 * there are any other decap flows that share the same tunnel L2
1093 * key and if so, pass that flow's decap_filter_handle as the
1094 * ref_decap_handle for this flow.
1095 */
1096 rc = bnxt_tc_get_ref_decap_handle(bp, flow, decap_l2_info, flow_node,
1097 &ref_decap_handle);
1098 if (rc)
1099 goto put_decap;
1100
1101 /* Issue the hwrm cmd to allocate a decap filter handle */
1102 rc = hwrm_cfa_decap_filter_alloc(bp, flow, decap_l2_info,
1103 ref_decap_handle,
1104 &decap_node->tunnel_handle);
1105 if (rc)
1106 goto put_decap_l2;
1107
1108done:
1109 *decap_filter_handle = decap_node->tunnel_handle;
1110 return 0;
1111
1112put_decap_l2:
1113 bnxt_tc_put_decap_l2_node(bp, flow_node);
1114put_decap:
1115 bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table,
1116 &tc_info->decap_ht_params,
1117 flow_node->decap_node);
1118 return rc;
1119}
1120
1121static void bnxt_tc_put_encap_handle(struct bnxt *bp,
1122 struct bnxt_tc_tunnel_node *encap_node)
1123{
1124 __le32 encap_handle = encap_node->tunnel_handle;
cd66358e 1125 struct bnxt_tc_info *tc_info = bp->tc_info;
8c95f773
SP		 1126 int rc;
1127
1128 rc = bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table,
1129 &tc_info->encap_ht_params, encap_node);
1130 if (!rc && encap_handle != INVALID_TUNNEL_HANDLE)
1131 hwrm_cfa_encap_record_free(bp, encap_handle);
1132}
1133
1134/* Lookup the tunnel encap table and check if there's an encap_handle
1135 * alloc'd already.
1136 * If not, query L2 info via a route lookup and issue an encap_record_alloc
1137 * cmd to FW.
1138 */
1139static int bnxt_tc_get_encap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow,
1140 struct bnxt_tc_flow_node *flow_node,
1141 __le32 *encap_handle)
1142{
1143 struct ip_tunnel_key *encap_key = &flow->actions.tun_encap_key;
cd66358e 1144 struct bnxt_tc_info *tc_info = bp->tc_info;
8c95f773
SP		 1145 struct bnxt_tc_tunnel_node *encap_node;
1146 int rc;
1147
1148 /* Check if there's another flow using the same tunnel encap.
1149 * If not, add this tunnel to the table and resolve the other
1150 * tunnel header fileds
1151 */
1152 encap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->encap_table,
1153 &tc_info->encap_ht_params,
1154 encap_key);
1155 if (!encap_node)
1156 return -ENOMEM;
1157
1158 flow_node->encap_node = encap_node;
1159
1160 if (encap_node->tunnel_handle != INVALID_TUNNEL_HANDLE)
1161 goto done;
1162
e9ecc731 1163 rc = bnxt_tc_resolve_tunnel_hdrs(bp, encap_key, &encap_node->l2_info);
8c95f773
SP		 1164 if (rc)
1165 goto put_encap;
1166
1167 /* Allocate a new tunnel encap record */
1168 rc = hwrm_cfa_encap_record_alloc(bp, encap_key, &encap_node->l2_info,
1169 &encap_node->tunnel_handle);
1170 if (rc)
1171 goto put_encap;
1172
1173done:
1174 *encap_handle = encap_node->tunnel_handle;
1175 return 0;
1176
1177put_encap:
1178 bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table,
1179 &tc_info->encap_ht_params, encap_node);
1180 return rc;
1181}
1182
1183static void bnxt_tc_put_tunnel_handle(struct bnxt *bp,
1184 struct bnxt_tc_flow *flow,
1185 struct bnxt_tc_flow_node *flow_node)
1186{
1187 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1188 bnxt_tc_put_decap_handle(bp, flow_node);
1189 else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP)
1190 bnxt_tc_put_encap_handle(bp, flow_node->encap_node);
1191}
1192
1193static int bnxt_tc_get_tunnel_handle(struct bnxt *bp,
1194 struct bnxt_tc_flow *flow,
1195 struct bnxt_tc_flow_node *flow_node,
1196 __le32 *tunnel_handle)
1197{
1198 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1199 return bnxt_tc_get_decap_handle(bp, flow, flow_node,
1200 tunnel_handle);
1201 else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP)
1202 return bnxt_tc_get_encap_handle(bp, flow, flow_node,
1203 tunnel_handle);
1204 else
1205 return 0;
1206}
2ae7408f
SP		 1207static int __bnxt_tc_del_flow(struct bnxt *bp,
1208 struct bnxt_tc_flow_node *flow_node)
1209{
cd66358e 1210 struct bnxt_tc_info *tc_info = bp->tc_info;
2ae7408f
SP		 1211 int rc;
1212
1213 /* send HWRM cmd to free the flow-id */
abd43a13 1214 bnxt_hwrm_cfa_flow_free(bp, flow_node);
2ae7408f
SP		 1215
1216 mutex_lock(&tc_info->lock);
1217
8c95f773
SP		 1218 /* release references to any tunnel encap/decap nodes */
1219 bnxt_tc_put_tunnel_handle(bp, &flow_node->flow, flow_node);
1220
2ae7408f
SP		 1221 /* release reference to l2 node */
1222 bnxt_tc_put_l2_node(bp, flow_node);
1223
1224 mutex_unlock(&tc_info->lock);
1225
1226 rc = rhashtable_remove_fast(&tc_info->flow_table, &flow_node->node,
1227 tc_info->flow_ht_params);
1228 if (rc)
1229 netdev_err(bp->dev, "Error: %s: rhashtable_remove_fast rc=%d",
1230 __func__, rc);
1231
1232 kfree_rcu(flow_node, rcu);
1233 return 0;
1234}
1235
abd43a13
VD		 1236static void bnxt_tc_set_flow_dir(struct bnxt *bp, struct bnxt_tc_flow *flow,
1237 u16 src_fid)
1238{
9bf46566 1239 flow->l2_key.dir = (bp->pf.fw_fid == src_fid) ? BNXT_DIR_RX : BNXT_DIR_TX;
abd43a13
VD		 1240}
1241
e9ecc731
SP		 1242static void bnxt_tc_set_src_fid(struct bnxt *bp, struct bnxt_tc_flow *flow,
1243 u16 src_fid)
1244{
1245 if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP)
1246 flow->src_fid = bp->pf.fw_fid;
1247 else
1248 flow->src_fid = src_fid;
1249}
1250
2ae7408f
SP		 1251/* Add a new flow or replace an existing flow.
1252 * Notes on locking:
1253 * There are essentially two critical sections here.
1254 * 1. while adding a new flow
1255 * a) lookup l2-key
1256 * b) issue HWRM cmd and get flow_handle
1257 * c) link l2-key with flow
1258 * 2. while deleting a flow
1259 * a) unlinking l2-key from flow
1260 * A lock is needed to protect these two critical sections.
1261 *
1262 * The hash-tables are already protected by the rhashtable API.
1263 */
1264static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid,
f9e30088 1265 struct flow_cls_offload *tc_flow_cmd)
2ae7408f
SP		 1266{
1267 struct bnxt_tc_flow_node *new_node, *old_node;
cd66358e 1268 struct bnxt_tc_info *tc_info = bp->tc_info;
2ae7408f 1269 struct bnxt_tc_flow *flow;
8c95f773 1270 __le32 tunnel_handle = 0;
2ae7408f
SP		 1271 __le16 ref_flow_handle;
1272 int rc;
1273
1274 /* allocate memory for the new flow and it's node */
1275 new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
1276 if (!new_node) {
1277 rc = -ENOMEM;
1278 goto done;
1279 }
1280 new_node->cookie = tc_flow_cmd->cookie;
1281 flow = &new_node->flow;
1282
1283 rc = bnxt_tc_parse_flow(bp, tc_flow_cmd, flow);
1284 if (rc)
1285 goto free_node;
e9ecc731
SP		 1286
1287 bnxt_tc_set_src_fid(bp, flow, src_fid);
685ec6a8 1288 bnxt_tc_set_flow_dir(bp, flow, flow->src_fid);
abd43a13 1289
2ae7408f 1290 if (!bnxt_tc_can_offload(bp, flow)) {
b2d69122 1291 rc = -EOPNOTSUPP;
2ae7408f
SP		 1292 goto free_node;
1293 }
1294
1295 /* If a flow exists with the same cookie, delete it */
1296 old_node = rhashtable_lookup_fast(&tc_info->flow_table,
1297 &tc_flow_cmd->cookie,
1298 tc_info->flow_ht_params);
1299 if (old_node)
1300 __bnxt_tc_del_flow(bp, old_node);
1301
1302 /* Check if the L2 part of the flow has been offloaded already.
1303 * If so, bump up it's refcnt and get it's reference handle.
1304 */
1305 mutex_lock(&tc_info->lock);
1306 rc = bnxt_tc_get_ref_flow_handle(bp, flow, new_node, &ref_flow_handle);
1307 if (rc)
1308 goto unlock;
1309
8c95f773
SP		 1310 /* If the flow involves tunnel encap/decap, get tunnel_handle */
1311 rc = bnxt_tc_get_tunnel_handle(bp, flow, new_node, &tunnel_handle);
1312 if (rc)
1313 goto put_l2;
1314
2ae7408f
SP		 1315 /* send HWRM cmd to alloc the flow */
1316 rc = bnxt_hwrm_cfa_flow_alloc(bp, flow, ref_flow_handle,
abd43a13 1317 tunnel_handle, new_node);
2ae7408f 1318 if (rc)
8c95f773 1319 goto put_tunnel;
2ae7408f 1320
5a84acbe
SP		 1321 flow->lastused = jiffies;
1322 spin_lock_init(&flow->stats_lock);
2ae7408f
SP		 1323 /* add new flow to flow-table */
1324 rc = rhashtable_insert_fast(&tc_info->flow_table, &new_node->node,
1325 tc_info->flow_ht_params);
1326 if (rc)
1327 goto hwrm_flow_free;
1328
1329 mutex_unlock(&tc_info->lock);
1330 return 0;
1331
1332hwrm_flow_free:
abd43a13 1333 bnxt_hwrm_cfa_flow_free(bp, new_node);
8c95f773
SP		 1334put_tunnel:
1335 bnxt_tc_put_tunnel_handle(bp, flow, new_node);
2ae7408f
SP		 1336put_l2:
1337 bnxt_tc_put_l2_node(bp, new_node);
1338unlock:
1339 mutex_unlock(&tc_info->lock);
1340free_node:
8c95f773 1341 kfree_rcu(new_node, rcu);
2ae7408f
SP		 1342done:
1343 netdev_err(bp->dev, "Error: %s: cookie=0x%lx error=%d",
1344 __func__, tc_flow_cmd->cookie, rc);
1345 return rc;
1346}
1347
1348static int bnxt_tc_del_flow(struct bnxt *bp,
f9e30088 1349 struct flow_cls_offload *tc_flow_cmd)
2ae7408f 1350{
cd66358e 1351 struct bnxt_tc_info *tc_info = bp->tc_info;
2ae7408f
SP		 1352 struct bnxt_tc_flow_node *flow_node;
1353
1354 flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
1355 &tc_flow_cmd->cookie,
1356 tc_info->flow_ht_params);
b9ecc340 1357 if (!flow_node)
2ae7408f 1358 return -EINVAL;
2ae7408f
SP		 1359
1360 return __bnxt_tc_del_flow(bp, flow_node);
1361}
1362
1363static int bnxt_tc_get_flow_stats(struct bnxt *bp,
f9e30088 1364 struct flow_cls_offload *tc_flow_cmd)
2ae7408f 1365{
5a84acbe 1366 struct bnxt_tc_flow_stats stats, *curr_stats, *prev_stats;
cd66358e 1367 struct bnxt_tc_info *tc_info = bp->tc_info;
d7bc7305 1368 struct bnxt_tc_flow_node *flow_node;
5a84acbe
SP		 1369 struct bnxt_tc_flow *flow;
1370 unsigned long lastused;
d7bc7305
SP		 1371
1372 flow_node = rhashtable_lookup_fast(&tc_info->flow_table,
1373 &tc_flow_cmd->cookie,
1374 tc_info->flow_ht_params);
b9ecc340 1375 if (!flow_node)
d7bc7305 1376 return -1;
d7bc7305 1377
5a84acbe
SP		 1378 flow = &flow_node->flow;
1379 curr_stats = &flow->stats;
1380 prev_stats = &flow->prev_stats;
1381
1382 spin_lock(&flow->stats_lock);
1383 stats.packets = curr_stats->packets - prev_stats->packets;
1384 stats.bytes = curr_stats->bytes - prev_stats->bytes;
1385 *prev_stats = *curr_stats;
1386 lastused = flow->lastused;
1387 spin_unlock(&flow->stats_lock);
1388
3b1903ef
PNA		 1389 flow_stats_update(&tc_flow_cmd->stats, stats.bytes, stats.packets,
1390 lastused);
5a84acbe
SP		 1391 return 0;
1392}
1393
abd43a13
VD		 1394static void bnxt_fill_cfa_stats_req(struct bnxt *bp,
1395 struct bnxt_tc_flow_node *flow_node,
1396 __le16 *flow_handle, __le32 *flow_id)
1397{
1398 u16 handle;
1399
1400 if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) {
1401 *flow_id = flow_node->flow_id;
1402
1403 /* If flow_id is used to fetch flow stats then:
1404 * 1. lower 12 bits of flow_handle must be set to all 1s.
1405 * 2. 15th bit of flow_handle must specify the flow
1406 * direction (TX/RX).
1407 */
9bf46566 1408 if (flow_node->flow.l2_key.dir == BNXT_DIR_RX)
abd43a13
VD		 1409 handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_DIR_RX |
1410 CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK;
1411 else
1412 handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK;
1413
1414 *flow_handle = cpu_to_le16(handle);
1415 } else {
1416 *flow_handle = flow_node->flow_handle;
1417 }
1418}
1419
5a84acbe
SP		 1420static int
1421bnxt_hwrm_cfa_flow_stats_get(struct bnxt *bp, int num_flows,
1422 struct bnxt_tc_stats_batch stats_batch[])
1423{
5a84acbe 1424 struct hwrm_cfa_flow_stats_input req = { 0 };
5c209fc8 1425 struct hwrm_cfa_flow_stats_output *resp;
5a84acbe 1426 __le16 *req_flow_handles = &req.flow_handle_0;
abd43a13 1427 __le32 *req_flow_ids = &req.flow_id_0;
5a84acbe
SP		 1428 int rc, i;
1429
1430 bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_STATS, -1, -1);
1431 req.num_flows = cpu_to_le16(num_flows);
1432 for (i = 0; i < num_flows; i++) {
1433 struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node;
1434
abd43a13
VD		 1435 bnxt_fill_cfa_stats_req(bp, flow_node,
1436 &req_flow_handles[i], &req_flow_ids[i]);
5a84acbe
SP		 1437 }
1438
1439 mutex_lock(&bp->hwrm_cmd_lock);
1440 rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
1441 if (!rc) {
5c209fc8
VD		 1442 __le64 *resp_packets;
1443 __le64 *resp_bytes;
1444
1445 resp = bnxt_get_hwrm_resp_addr(bp, &req);
1446 resp_packets = &resp->packet_0;
1447 resp_bytes = &resp->byte_0;
5a84acbe
SP		 1448
1449 for (i = 0; i < num_flows; i++) {
1450 stats_batch[i].hw_stats.packets =
1451 le64_to_cpu(resp_packets[i]);
1452 stats_batch[i].hw_stats.bytes =
1453 le64_to_cpu(resp_bytes[i]);
1454 }
1455 } else {
1456 netdev_info(bp->dev, "error rc=%d", rc);
1457 }
5a84acbe 1458 mutex_unlock(&bp->hwrm_cmd_lock);
6ae777ea
VD		 1459
1460 if (rc)
1461 rc = -EIO;
5a84acbe
SP		 1462 return rc;
1463}
1464
1465/* Add val to accum while handling a possible wraparound
1466 * of val. Eventhough val is of type u64, its actual width
1467 * is denoted by mask and will wrap-around beyond that width.
1468 */
1469static void accumulate_val(u64 *accum, u64 val, u64 mask)
1470{
1471#define low_bits(x, mask) ((x) & (mask))
1472#define high_bits(x, mask) ((x) & ~(mask))
1473 bool wrapped = val < low_bits(*accum, mask);
1474
1475 *accum = high_bits(*accum, mask) + val;
1476 if (wrapped)
1477 *accum += (mask + 1);
1478}
1479
1480/* The HW counters' width is much less than 64bits.
1481 * Handle possible wrap-around while updating the stat counters
1482 */
1483static void bnxt_flow_stats_accum(struct bnxt_tc_info *tc_info,
1484 struct bnxt_tc_flow_stats *acc_stats,
1485 struct bnxt_tc_flow_stats *hw_stats)
1486{
1487 accumulate_val(&acc_stats->bytes, hw_stats->bytes, tc_info->bytes_mask);
1488 accumulate_val(&acc_stats->packets, hw_stats->packets,
1489 tc_info->packets_mask);
1490}
1491
1492static int
1493bnxt_tc_flow_stats_batch_update(struct bnxt *bp, int num_flows,
1494 struct bnxt_tc_stats_batch stats_batch[])
1495{
cd66358e 1496 struct bnxt_tc_info *tc_info = bp->tc_info;
5a84acbe
SP		 1497 int rc, i;
1498
1499 rc = bnxt_hwrm_cfa_flow_stats_get(bp, num_flows, stats_batch);
d7bc7305
SP		 1500 if (rc)
1501 return rc;
1502
5a84acbe
SP		 1503 for (i = 0; i < num_flows; i++) {
1504 struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node;
1505 struct bnxt_tc_flow *flow = &flow_node->flow;
1506
1507 spin_lock(&flow->stats_lock);
1508 bnxt_flow_stats_accum(tc_info, &flow->stats,
1509 &stats_batch[i].hw_stats);
1510 if (flow->stats.packets != flow->prev_stats.packets)
1511 flow->lastused = jiffies;
1512 spin_unlock(&flow->stats_lock);
1513 }
1514
2ae7408f
SP		 1515 return 0;
1516}
1517
5a84acbe
SP		 1518static int
1519bnxt_tc_flow_stats_batch_prep(struct bnxt *bp,
1520 struct bnxt_tc_stats_batch stats_batch[],
1521 int *num_flows)
1522{
cd66358e 1523 struct bnxt_tc_info *tc_info = bp->tc_info;
5a84acbe
SP		 1524 struct rhashtable_iter *iter = &tc_info->iter;
1525 void *flow_node;
1526 int rc, i;
1527
97a6ec4a 1528 rhashtable_walk_start(iter);
5a84acbe
SP		 1529
1530 rc = 0;
1531 for (i = 0; i < BNXT_FLOW_STATS_BATCH_MAX; i++) {
1532 flow_node = rhashtable_walk_next(iter);
1533 if (IS_ERR(flow_node)) {
1534 i = 0;
1535 if (PTR_ERR(flow_node) == -EAGAIN) {
1536 continue;
1537 } else {
1538 rc = PTR_ERR(flow_node);
1539 goto done;
1540 }
1541 }
1542
1543 /* No more flows */
1544 if (!flow_node)
1545 goto done;
1546
1547 stats_batch[i].flow_node = flow_node;
1548 }
1549done:
1550 rhashtable_walk_stop(iter);
1551 *num_flows = i;
1552 return rc;
1553}
1554
1555void bnxt_tc_flow_stats_work(struct bnxt *bp)
1556{
cd66358e 1557 struct bnxt_tc_info *tc_info = bp->tc_info;
5a84acbe
SP		 1558 int num_flows, rc;
1559
1560 num_flows = atomic_read(&tc_info->flow_table.nelems);
1561 if (!num_flows)
1562 return;
1563
1564 rhashtable_walk_enter(&tc_info->flow_table, &tc_info->iter);
1565
1566 for (;;) {
1567 rc = bnxt_tc_flow_stats_batch_prep(bp, tc_info->stats_batch,
1568 &num_flows);
1569 if (rc) {
1570 if (rc == -EAGAIN)
1571 continue;
1572 break;
1573 }
1574
1575 if (!num_flows)
1576 break;
1577
1578 bnxt_tc_flow_stats_batch_update(bp, num_flows,
1579 tc_info->stats_batch);
1580 }
1581
1582 rhashtable_walk_exit(&tc_info->iter);
1583}
1584
2ae7408f 1585int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
f9e30088 1586 struct flow_cls_offload *cls_flower)
2ae7408f 1587{
2ae7408f 1588 switch (cls_flower->command) {
f9e30088 1589 case FLOW_CLS_REPLACE:
83741bb0 1590 return bnxt_tc_add_flow(bp, src_fid, cls_flower);
f9e30088 1591 case FLOW_CLS_DESTROY:
83741bb0 1592 return bnxt_tc_del_flow(bp, cls_flower);
f9e30088 1593 case FLOW_CLS_STATS:
83741bb0
JP		 1594 return bnxt_tc_get_flow_stats(bp, cls_flower);
1595 default:
1596 return -EOPNOTSUPP;
2ae7408f 1597 }
2ae7408f
SP		 1598}
1599
1600static const struct rhashtable_params bnxt_tc_flow_ht_params = {
1601 .head_offset = offsetof(struct bnxt_tc_flow_node, node),
1602 .key_offset = offsetof(struct bnxt_tc_flow_node, cookie),
1603 .key_len = sizeof(((struct bnxt_tc_flow_node *)0)->cookie),
1604 .automatic_shrinking = true
1605};
1606
1607static const struct rhashtable_params bnxt_tc_l2_ht_params = {
1608 .head_offset = offsetof(struct bnxt_tc_l2_node, node),
1609 .key_offset = offsetof(struct bnxt_tc_l2_node, key),
1610 .key_len = BNXT_TC_L2_KEY_LEN,
1611 .automatic_shrinking = true
1612};
1613
8c95f773
SP		 1614static const struct rhashtable_params bnxt_tc_decap_l2_ht_params = {
1615 .head_offset = offsetof(struct bnxt_tc_l2_node, node),
1616 .key_offset = offsetof(struct bnxt_tc_l2_node, key),
1617 .key_len = BNXT_TC_L2_KEY_LEN,
1618 .automatic_shrinking = true
1619};
1620
1621static const struct rhashtable_params bnxt_tc_tunnel_ht_params = {
1622 .head_offset = offsetof(struct bnxt_tc_tunnel_node, node),
1623 .key_offset = offsetof(struct bnxt_tc_tunnel_node, key),
1624 .key_len = sizeof(struct ip_tunnel_key),
1625 .automatic_shrinking = true
1626};
1627
2ae7408f
SP		 1628/* convert counter width in bits to a mask */
1629#define mask(width) ((u64)~0 >> (64 - (width)))
1630
1631int bnxt_init_tc(struct bnxt *bp)
1632{
cd66358e 1633 struct bnxt_tc_info *tc_info;
2ae7408f
SP		 1634 int rc;
1635
8c95f773 1636 if (bp->hwrm_spec_code < 0x10803) {
2ae7408f
SP		 1637 netdev_warn(bp->dev,
1638 "Firmware does not support TC flower offload.\n");
1639 return -ENOTSUPP;
1640 }
cd66358e
SP		 1641
1642 tc_info = kzalloc(sizeof(*tc_info), GFP_KERNEL);
1643 if (!tc_info)
1644 return -ENOMEM;
2ae7408f
SP		 1645 mutex_init(&tc_info->lock);
1646
1647 /* Counter widths are programmed by FW */
1648 tc_info->bytes_mask = mask(36);
1649 tc_info->packets_mask = mask(28);
1650
1651 tc_info->flow_ht_params = bnxt_tc_flow_ht_params;
1652 rc = rhashtable_init(&tc_info->flow_table, &tc_info->flow_ht_params);
1653 if (rc)
cd66358e 1654 goto free_tc_info;
2ae7408f
SP		 1655
1656 tc_info->l2_ht_params = bnxt_tc_l2_ht_params;
1657 rc = rhashtable_init(&tc_info->l2_table, &tc_info->l2_ht_params);
1658 if (rc)
1659 goto destroy_flow_table;
1660
8c95f773
SP		 1661 tc_info->decap_l2_ht_params = bnxt_tc_decap_l2_ht_params;
1662 rc = rhashtable_init(&tc_info->decap_l2_table,
1663 &tc_info->decap_l2_ht_params);
1664 if (rc)
1665 goto destroy_l2_table;
1666
1667 tc_info->decap_ht_params = bnxt_tc_tunnel_ht_params;
1668 rc = rhashtable_init(&tc_info->decap_table,
1669 &tc_info->decap_ht_params);
1670 if (rc)
1671 goto destroy_decap_l2_table;
1672
1673 tc_info->encap_ht_params = bnxt_tc_tunnel_ht_params;
1674 rc = rhashtable_init(&tc_info->encap_table,
1675 &tc_info->encap_ht_params);
1676 if (rc)
1677 goto destroy_decap_table;
1678
2ae7408f
SP		 1679 tc_info->enabled = true;
1680 bp->dev->hw_features |= NETIF_F_HW_TC;
1681 bp->dev->features |= NETIF_F_HW_TC;
cd66358e 1682 bp->tc_info = tc_info;
2ae7408f
SP		 1683 return 0;
1684
8c95f773
SP		 1685destroy_decap_table:
1686 rhashtable_destroy(&tc_info->decap_table);
1687destroy_decap_l2_table:
1688 rhashtable_destroy(&tc_info->decap_l2_table);
1689destroy_l2_table:
1690 rhashtable_destroy(&tc_info->l2_table);
2ae7408f
SP		 1691destroy_flow_table:
1692 rhashtable_destroy(&tc_info->flow_table);
cd66358e
SP		 1693free_tc_info:
1694 kfree(tc_info);
2ae7408f
SP		 1695 return rc;
1696}
1697
1698void bnxt_shutdown_tc(struct bnxt *bp)
1699{
cd66358e 1700 struct bnxt_tc_info *tc_info = bp->tc_info;
2ae7408f 1701
cd66358e 1702 if (!bnxt_tc_flower_enabled(bp))
2ae7408f
SP		 1703 return;
1704
1705 rhashtable_destroy(&tc_info->flow_table);
1706 rhashtable_destroy(&tc_info->l2_table);
8c95f773
SP		 1707 rhashtable_destroy(&tc_info->decap_l2_table);
1708 rhashtable_destroy(&tc_info->decap_table);
1709 rhashtable_destroy(&tc_info->encap_table);
cd66358e
SP		 1710 kfree(tc_info);
1711 bp->tc_info = NULL;
2ae7408f 1712}
Linux 6.x block layer and io_uring tree(s)