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33#include <linux/mlx5/fs.h>
34#include "en.h"
35
36struct mlx5e_ethtool_rule {
37 struct list_head list;
38 struct ethtool_rx_flow_spec flow_spec;
39 struct mlx5_flow_rule *rule;
40 struct mlx5e_ethtool_table *eth_ft;
41};
42
43static void put_flow_table(struct mlx5e_ethtool_table *eth_ft)
44{
45 if (!--eth_ft->num_rules) {
46 mlx5_destroy_flow_table(eth_ft->ft);
47 eth_ft->ft = NULL;
48 }
49}
50
51#define MLX5E_ETHTOOL_L3_L4_PRIO 0
52#define MLX5E_ETHTOOL_L2_PRIO (MLX5E_ETHTOOL_L3_L4_PRIO + ETHTOOL_NUM_L3_L4_FTS)
53#define MLX5E_ETHTOOL_NUM_ENTRIES 64000
54#define MLX5E_ETHTOOL_NUM_GROUPS 10
55static struct mlx5e_ethtool_table *get_flow_table(struct mlx5e_priv *priv,
56 struct ethtool_rx_flow_spec *fs,
57 int num_tuples)
58{
59 struct mlx5e_ethtool_table *eth_ft;
60 struct mlx5_flow_namespace *ns;
61 struct mlx5_flow_table *ft;
62 int max_tuples;
63 int table_size;
64 int prio;
65
66 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
67 case TCP_V4_FLOW:
68 case UDP_V4_FLOW:
69 max_tuples = ETHTOOL_NUM_L3_L4_FTS;
70 prio = MLX5E_ETHTOOL_L3_L4_PRIO + (max_tuples - num_tuples);
71 eth_ft = &priv->fs.ethtool.l3_l4_ft[prio];
72 break;
73 case IP_USER_FLOW:
74 max_tuples = ETHTOOL_NUM_L3_L4_FTS;
75 prio = MLX5E_ETHTOOL_L3_L4_PRIO + (max_tuples - num_tuples);
76 eth_ft = &priv->fs.ethtool.l3_l4_ft[prio];
77 break;
78 case ETHER_FLOW:
79 max_tuples = ETHTOOL_NUM_L2_FTS;
80 prio = max_tuples - num_tuples;
81 eth_ft = &priv->fs.ethtool.l2_ft[prio];
82 prio += MLX5E_ETHTOOL_L2_PRIO;
83 break;
84 default:
85 return ERR_PTR(-EINVAL);
86 }
87
88 eth_ft->num_rules++;
89 if (eth_ft->ft)
90 return eth_ft;
91
92 ns = mlx5_get_flow_namespace(priv->mdev,
93 MLX5_FLOW_NAMESPACE_ETHTOOL);
94 if (!ns)
95 return ERR_PTR(-ENOTSUPP);
96
97 table_size = min_t(u32, BIT(MLX5_CAP_FLOWTABLE(priv->mdev,
98 flow_table_properties_nic_receive.log_max_ft_size)),
99 MLX5E_ETHTOOL_NUM_ENTRIES);
100 ft = mlx5_create_auto_grouped_flow_table(ns, prio,
101 table_size,
102 MLX5E_ETHTOOL_NUM_GROUPS, 0);
103 if (IS_ERR(ft))
104 return (void *)ft;
105
106 eth_ft->ft = ft;
107 return eth_ft;
108}
109
110static void mask_spec(u8 *mask, u8 *val, size_t size)
111{
112 unsigned int i;
113
114 for (i = 0; i < size; i++, mask++, val++)
115 *((u8 *)val) = *((u8 *)mask) & *((u8 *)val);
116}
117
118static void set_ips(void *outer_headers_v, void *outer_headers_c, __be32 ip4src_m,
119 __be32 ip4src_v, __be32 ip4dst_m, __be32 ip4dst_v)
120{
121 if (ip4src_m) {
122 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_v,
123 src_ipv4_src_ipv6.ipv4_layout.ipv4),
124 &ip4src_v, sizeof(ip4src_v));
125 memset(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_c,
126 src_ipv4_src_ipv6.ipv4_layout.ipv4),
127 0xff, sizeof(ip4src_m));
128 }
129 if (ip4dst_m) {
130 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_v,
131 dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
132 &ip4dst_v, sizeof(ip4dst_v));
133 memset(MLX5_ADDR_OF(fte_match_set_lyr_2_4, outer_headers_c,
134 dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
135 0xff, sizeof(ip4dst_m));
136 }
137 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v,
138 ethertype, ETH_P_IP);
139 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c,
140 ethertype, 0xffff);
141}
142
143static int set_flow_attrs(u32 *match_c, u32 *match_v,
144 struct ethtool_rx_flow_spec *fs)
145{
146 void *outer_headers_c = MLX5_ADDR_OF(fte_match_param, match_c,
147 outer_headers);
148 void *outer_headers_v = MLX5_ADDR_OF(fte_match_param, match_v,
149 outer_headers);
150 u32 flow_type = fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT);
151 struct ethtool_tcpip4_spec *l4_mask;
152 struct ethtool_tcpip4_spec *l4_val;
153 struct ethtool_usrip4_spec *l3_mask;
154 struct ethtool_usrip4_spec *l3_val;
155 struct ethhdr *eth_val;
156 struct ethhdr *eth_mask;
157
158 switch (flow_type) {
159 case TCP_V4_FLOW:
160 l4_mask = &fs->m_u.tcp_ip4_spec;
161 l4_val = &fs->h_u.tcp_ip4_spec;
162 set_ips(outer_headers_v, outer_headers_c, l4_mask->ip4src,
163 l4_val->ip4src, l4_mask->ip4dst, l4_val->ip4dst);
164
165 if (l4_mask->psrc) {
166 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c, tcp_sport,
167 0xffff);
168 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v, tcp_sport,
169 ntohs(l4_val->psrc));
170 }
171 if (l4_mask->pdst) {
172 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c, tcp_dport,
173 0xffff);
174 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v, tcp_dport,
175 ntohs(l4_val->pdst));
176 }
177 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c, ip_protocol,
178 0xffff);
179 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v, ip_protocol,
180 IPPROTO_TCP);
181 break;
182 case UDP_V4_FLOW:
183 l4_mask = &fs->m_u.tcp_ip4_spec;
184 l4_val = &fs->h_u.tcp_ip4_spec;
185 set_ips(outer_headers_v, outer_headers_c, l4_mask->ip4src,
186 l4_val->ip4src, l4_mask->ip4dst, l4_val->ip4dst);
187
188 if (l4_mask->psrc) {
189 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c, udp_sport,
190 0xffff);
191 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v, udp_sport,
192 ntohs(l4_val->psrc));
193 }
194 if (l4_mask->pdst) {
195 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c, udp_dport,
196 0xffff);
197 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v, udp_dport,
198 ntohs(l4_val->pdst));
199 }
200 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c, ip_protocol,
201 0xffff);
202 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v, ip_protocol,
203 IPPROTO_UDP);
204 break;
205 case IP_USER_FLOW:
206 l3_mask = &fs->m_u.usr_ip4_spec;
207 l3_val = &fs->h_u.usr_ip4_spec;
208 set_ips(outer_headers_v, outer_headers_c, l3_mask->ip4src,
209 l3_val->ip4src, l3_mask->ip4dst, l3_val->ip4dst);
210 break;
211 case ETHER_FLOW:
212 eth_mask = &fs->m_u.ether_spec;
213 eth_val = &fs->h_u.ether_spec;
214
215 mask_spec((u8 *)eth_mask, (u8 *)eth_val, sizeof(*eth_mask));
216 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4,
217 outer_headers_c, smac_47_16),
218 eth_mask->h_source);
219 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4,
220 outer_headers_v, smac_47_16),
221 eth_val->h_source);
222 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4,
223 outer_headers_c, dmac_47_16),
224 eth_mask->h_dest);
225 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4,
226 outer_headers_v, dmac_47_16),
227 eth_val->h_dest);
228 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c, ethertype,
229 ntohs(eth_mask->h_proto));
230 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v, ethertype,
231 ntohs(eth_val->h_proto));
232 break;
233 default:
234 return -EINVAL;
235 }
236
237 if ((fs->flow_type & FLOW_EXT) &&
238 (fs->m_ext.vlan_tci & cpu_to_be16(VLAN_VID_MASK))) {
239 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c,
240 vlan_tag, 1);
241 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v,
242 vlan_tag, 1);
243 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_c,
244 first_vid, 0xfff);
245 MLX5_SET(fte_match_set_lyr_2_4, outer_headers_v,
246 first_vid, ntohs(fs->h_ext.vlan_tci));
247 }
248 if (fs->flow_type & FLOW_MAC_EXT &&
249 !is_zero_ether_addr(fs->m_ext.h_dest)) {
250 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4,
251 outer_headers_c, dmac_47_16),
252 fs->m_ext.h_dest);
253 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4,
254 outer_headers_v, dmac_47_16),
255 fs->h_ext.h_dest);
256 }
257
258 return 0;
259}
260
261static void add_rule_to_list(struct mlx5e_priv *priv,
262 struct mlx5e_ethtool_rule *rule)
263{
264 struct mlx5e_ethtool_rule *iter;
265 struct list_head *head = &priv->fs.ethtool.rules;
266
267 list_for_each_entry(iter, &priv->fs.ethtool.rules, list) {
268 if (iter->flow_spec.location > rule->flow_spec.location)
269 break;
270 head = &iter->list;
271 }
272 priv->fs.ethtool.tot_num_rules++;
273 list_add(&rule->list, head);
274}
275
276static bool outer_header_zero(u32 *match_criteria)
277{
278 int size = MLX5_ST_SZ_BYTES(fte_match_param);
279 char *outer_headers_c = MLX5_ADDR_OF(fte_match_param, match_criteria,
280 outer_headers);
281
282 return outer_headers_c[0] == 0 && !memcmp(outer_headers_c,
283 outer_headers_c + 1,
284 size - 1);
285}
286
287static struct mlx5_flow_rule *add_ethtool_flow_rule(struct mlx5e_priv *priv,
288 struct mlx5_flow_table *ft,
289 struct ethtool_rx_flow_spec *fs)
290{
291 struct mlx5_flow_destination *dst = NULL;
292 struct mlx5_flow_spec *spec;
293 struct mlx5_flow_rule *rule;
294 int err = 0;
295 u32 action;
296
297 spec = mlx5_vzalloc(sizeof(*spec));
298 if (!spec)
299 return ERR_PTR(-ENOMEM);
300 err = set_flow_attrs(spec->match_criteria, spec->match_value,
301 fs);
302 if (err)
303 goto free;
304
305 if (fs->ring_cookie == RX_CLS_FLOW_DISC) {
306 action = MLX5_FLOW_CONTEXT_ACTION_DROP;
307 } else {
308 dst = kzalloc(sizeof(*dst), GFP_KERNEL);
309 if (!dst) {
310 err = -ENOMEM;
311 goto free;
312 }
313
314 dst->type = MLX5_FLOW_DESTINATION_TYPE_TIR;
315 dst->tir_num = priv->direct_tir[fs->ring_cookie].tirn;
316 action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
317 }
318
319 spec->match_criteria_enable = (!outer_header_zero(spec->match_criteria));
320 rule = mlx5_add_flow_rule(ft, spec, action,
321 MLX5_FS_DEFAULT_FLOW_TAG, dst);
322 if (IS_ERR(rule)) {
323 err = PTR_ERR(rule);
324 netdev_err(priv->netdev, "%s: failed to add ethtool steering rule: %d\n",
325 __func__, err);
326 goto free;
327 }
328free:
329 kvfree(spec);
330 kfree(dst);
331 return err ? ERR_PTR(err) : rule;
332}
333
334static void del_ethtool_rule(struct mlx5e_priv *priv,
335 struct mlx5e_ethtool_rule *eth_rule)
336{
337 if (eth_rule->rule)
338 mlx5_del_flow_rule(eth_rule->rule);
339 list_del(ð_rule->list);
340 priv->fs.ethtool.tot_num_rules--;
341 put_flow_table(eth_rule->eth_ft);
342 kfree(eth_rule);
343}
344
345static struct mlx5e_ethtool_rule *find_ethtool_rule(struct mlx5e_priv *priv,
346 int location)
347{
348 struct mlx5e_ethtool_rule *iter;
349
350 list_for_each_entry(iter, &priv->fs.ethtool.rules, list) {
351 if (iter->flow_spec.location == location)
352 return iter;
353 }
354 return NULL;
355}
356
357static struct mlx5e_ethtool_rule *get_ethtool_rule(struct mlx5e_priv *priv,
358 int location)
359{
360 struct mlx5e_ethtool_rule *eth_rule;
361
362 eth_rule = find_ethtool_rule(priv, location);
363 if (eth_rule)
364 del_ethtool_rule(priv, eth_rule);
365
366 eth_rule = kzalloc(sizeof(*eth_rule), GFP_KERNEL);
367 if (!eth_rule)
368 return ERR_PTR(-ENOMEM);
369
370 add_rule_to_list(priv, eth_rule);
371 return eth_rule;
372}
373
374#define MAX_NUM_OF_ETHTOOL_RULES BIT(10)
375
376#define all_ones(field) (field == (__force typeof(field))-1)
377#define all_zeros_or_all_ones(field) \
378 ((field) == 0 || (field) == (__force typeof(field))-1)
379
380static int validate_flow(struct mlx5e_priv *priv,
381 struct ethtool_rx_flow_spec *fs)
382{
383 struct ethtool_tcpip4_spec *l4_mask;
384 struct ethtool_usrip4_spec *l3_mask;
385 struct ethhdr *eth_mask;
386 int num_tuples = 0;
387
388 if (fs->location >= MAX_NUM_OF_ETHTOOL_RULES)
389 return -EINVAL;
390
391 if (fs->ring_cookie >= priv->params.num_channels &&
392 fs->ring_cookie != RX_CLS_FLOW_DISC)
393 return -EINVAL;
394
395 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT)) {
396 case ETHER_FLOW:
397 eth_mask = &fs->m_u.ether_spec;
398 if (!is_zero_ether_addr(eth_mask->h_dest))
399 num_tuples++;
400 if (!is_zero_ether_addr(eth_mask->h_source))
401 num_tuples++;
402 if (eth_mask->h_proto)
403 num_tuples++;
404 break;
405 case TCP_V4_FLOW:
406 case UDP_V4_FLOW:
407 if (fs->m_u.tcp_ip4_spec.tos)
408 return -EINVAL;
409 l4_mask = &fs->m_u.tcp_ip4_spec;
410 if (l4_mask->ip4src) {
411 if (!all_ones(l4_mask->ip4src))
412 return -EINVAL;
413 num_tuples++;
414 }
415 if (l4_mask->ip4dst) {
416 if (!all_ones(l4_mask->ip4dst))
417 return -EINVAL;
418 num_tuples++;
419 }
420 if (l4_mask->psrc) {
421 if (!all_ones(l4_mask->psrc))
422 return -EINVAL;
423 num_tuples++;
424 }
425 if (l4_mask->pdst) {
426 if (!all_ones(l4_mask->pdst))
427 return -EINVAL;
428 num_tuples++;
429 }
430
431 num_tuples++;
432 break;
433 case IP_USER_FLOW:
434 l3_mask = &fs->m_u.usr_ip4_spec;
435 if (l3_mask->l4_4_bytes || l3_mask->tos || l3_mask->proto ||
436 fs->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
437 return -EINVAL;
438 if (l3_mask->ip4src) {
439 if (!all_ones(l3_mask->ip4src))
440 return -EINVAL;
441 num_tuples++;
442 }
443 if (l3_mask->ip4dst) {
444 if (!all_ones(l3_mask->ip4dst))
445 return -EINVAL;
446 num_tuples++;
447 }
448
449 num_tuples++;
450 break;
451 default:
452 return -EINVAL;
453 }
454 if ((fs->flow_type & FLOW_EXT)) {
455 if (fs->m_ext.vlan_etype ||
456 (fs->m_ext.vlan_tci != cpu_to_be16(VLAN_VID_MASK)))
457 return -EINVAL;
458
459 if (fs->m_ext.vlan_tci) {
460 if (be16_to_cpu(fs->h_ext.vlan_tci) >= VLAN_N_VID)
461 return -EINVAL;
462 }
463 num_tuples++;
464 }
465
466 if (fs->flow_type & FLOW_MAC_EXT &&
467 !is_zero_ether_addr(fs->m_ext.h_dest))
468 num_tuples++;
469
470 return num_tuples;
471}
472
473int mlx5e_ethtool_flow_replace(struct mlx5e_priv *priv,
474 struct ethtool_rx_flow_spec *fs)
475{
476 struct mlx5e_ethtool_table *eth_ft;
477 struct mlx5e_ethtool_rule *eth_rule;
478 struct mlx5_flow_rule *rule;
479 int num_tuples;
480 int err;
481
482 num_tuples = validate_flow(priv, fs);
483 if (num_tuples <= 0) {
484 netdev_warn(priv->netdev, "%s: flow is not valid\n", __func__);
485 return -EINVAL;
486 }
487
488 eth_ft = get_flow_table(priv, fs, num_tuples);
489 if (IS_ERR(eth_ft))
490 return PTR_ERR(eth_ft);
491
492 eth_rule = get_ethtool_rule(priv, fs->location);
493 if (IS_ERR(eth_rule)) {
494 put_flow_table(eth_ft);
495 return PTR_ERR(eth_rule);
496 }
497
498 eth_rule->flow_spec = *fs;
499 eth_rule->eth_ft = eth_ft;
500 if (!eth_ft->ft) {
501 err = -EINVAL;
502 goto del_ethtool_rule;
503 }
504 rule = add_ethtool_flow_rule(priv, eth_ft->ft, fs);
505 if (IS_ERR(rule)) {
506 err = PTR_ERR(rule);
507 goto del_ethtool_rule;
508 }
509
510 eth_rule->rule = rule;
511
512 return 0;
513
514del_ethtool_rule:
515 del_ethtool_rule(priv, eth_rule);
516
517 return err;
518}
519
520int mlx5e_ethtool_flow_remove(struct mlx5e_priv *priv,
521 int location)
522{
523 struct mlx5e_ethtool_rule *eth_rule;
524 int err = 0;
525
526 if (location >= MAX_NUM_OF_ETHTOOL_RULES)
527 return -ENOSPC;
528
529 eth_rule = find_ethtool_rule(priv, location);
530 if (!eth_rule) {
531 err = -ENOENT;
532 goto out;
533 }
534
535 del_ethtool_rule(priv, eth_rule);
536out:
537 return err;
538}
539
540int mlx5e_ethtool_get_flow(struct mlx5e_priv *priv, struct ethtool_rxnfc *info,
541 int location)
542{
543 struct mlx5e_ethtool_rule *eth_rule;
544
545 if (location < 0 || location >= MAX_NUM_OF_ETHTOOL_RULES)
546 return -EINVAL;
547
548 list_for_each_entry(eth_rule, &priv->fs.ethtool.rules, list) {
549 if (eth_rule->flow_spec.location == location) {
550 info->fs = eth_rule->flow_spec;
551 return 0;
552 }
553 }
554
555 return -ENOENT;
556}
557
558int mlx5e_ethtool_get_all_flows(struct mlx5e_priv *priv, struct ethtool_rxnfc *info,
559 u32 *rule_locs)
560{
561 int location = 0;
562 int idx = 0;
563 int err = 0;
564
565 while ((!err || err == -ENOENT) && idx < info->rule_cnt) {
566 err = mlx5e_ethtool_get_flow(priv, info, location);
567 if (!err)
568 rule_locs[idx++] = location;
569 location++;
570 }
571 return err;
572}
573
574void mlx5e_ethtool_cleanup_steering(struct mlx5e_priv *priv)
575{
576 struct mlx5e_ethtool_rule *iter;
577 struct mlx5e_ethtool_rule *temp;
578
579 list_for_each_entry_safe(iter, temp, &priv->fs.ethtool.rules, list)
580 del_ethtool_rule(priv, iter);
581}
582
583void mlx5e_ethtool_init_steering(struct mlx5e_priv *priv)
584{
585 INIT_LIST_HEAD(&priv->fs.ethtool.rules);
586}
587
