2 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
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23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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33 #include <net/flow_dissector.h>
34 #include <net/pkt_cls.h>
35 #include <net/tc_act/tc_gact.h>
36 #include <net/tc_act/tc_skbedit.h>
37 #include <linux/mlx5/fs.h>
38 #include <linux/mlx5/device.h>
39 #include <linux/rhashtable.h>
43 struct mlx5e_tc_flow {
44 struct rhash_head node;
46 struct mlx5_flow_rule *rule;
49 #define MLX5E_TC_FLOW_TABLE_NUM_ENTRIES 1024
50 #define MLX5E_TC_FLOW_TABLE_NUM_GROUPS 4
52 static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv,
53 u32 *match_c, u32 *match_v,
54 u32 action, u32 flow_tag)
56 struct mlx5_flow_destination dest = {
57 .type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE,
58 {.ft = priv->fts.vlan.t},
60 struct mlx5_flow_rule *rule;
61 bool table_created = false;
63 if (IS_ERR_OR_NULL(priv->fts.tc.t)) {
65 mlx5_create_auto_grouped_flow_table(priv->fts.ns, 0,
66 MLX5E_TC_FLOW_TABLE_NUM_ENTRIES,
67 MLX5E_TC_FLOW_TABLE_NUM_GROUPS);
68 if (IS_ERR(priv->fts.tc.t)) {
69 netdev_err(priv->netdev,
70 "Failed to create tc offload table\n");
71 return ERR_CAST(priv->fts.tc.t);
77 rule = mlx5_add_flow_rule(priv->fts.tc.t, MLX5_MATCH_OUTER_HEADERS,
80 action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST ? &dest : NULL);
82 if (IS_ERR(rule) && table_created) {
83 mlx5_destroy_flow_table(priv->fts.tc.t);
84 priv->fts.tc.t = NULL;
90 static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
91 struct mlx5_flow_rule *rule)
93 mlx5_del_flow_rule(rule);
95 if (!mlx5e_tc_num_filters(priv)) {
96 mlx5_destroy_flow_table(priv->fts.tc.t);
97 priv->fts.tc.t = NULL;
101 static int parse_cls_flower(struct mlx5e_priv *priv,
102 u32 *match_c, u32 *match_v,
103 struct tc_cls_flower_offload *f)
105 void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c, outer_headers);
106 void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v, outer_headers);
110 if (f->dissector->used_keys &
111 ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
112 BIT(FLOW_DISSECTOR_KEY_BASIC) |
113 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
114 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
115 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
116 BIT(FLOW_DISSECTOR_KEY_PORTS))) {
117 netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
118 f->dissector->used_keys);
122 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
123 struct flow_dissector_key_control *key =
124 skb_flow_dissector_target(f->dissector,
125 FLOW_DISSECTOR_KEY_BASIC,
127 addr_type = key->addr_type;
130 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
131 struct flow_dissector_key_basic *key =
132 skb_flow_dissector_target(f->dissector,
133 FLOW_DISSECTOR_KEY_BASIC,
135 struct flow_dissector_key_basic *mask =
136 skb_flow_dissector_target(f->dissector,
137 FLOW_DISSECTOR_KEY_BASIC,
139 ip_proto = key->ip_proto;
141 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
142 ntohs(mask->n_proto));
143 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
144 ntohs(key->n_proto));
146 MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
148 MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
152 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
153 struct flow_dissector_key_eth_addrs *key =
154 skb_flow_dissector_target(f->dissector,
155 FLOW_DISSECTOR_KEY_ETH_ADDRS,
157 struct flow_dissector_key_eth_addrs *mask =
158 skb_flow_dissector_target(f->dissector,
159 FLOW_DISSECTOR_KEY_ETH_ADDRS,
162 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
165 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
169 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
172 ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
177 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
178 struct flow_dissector_key_ipv4_addrs *key =
179 skb_flow_dissector_target(f->dissector,
180 FLOW_DISSECTOR_KEY_IPV4_ADDRS,
182 struct flow_dissector_key_ipv4_addrs *mask =
183 skb_flow_dissector_target(f->dissector,
184 FLOW_DISSECTOR_KEY_IPV4_ADDRS,
187 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
188 src_ipv4_src_ipv6.ipv4_layout.ipv4),
189 &mask->src, sizeof(mask->src));
190 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
191 src_ipv4_src_ipv6.ipv4_layout.ipv4),
192 &key->src, sizeof(key->src));
193 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
194 dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
195 &mask->dst, sizeof(mask->dst));
196 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
197 dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
198 &key->dst, sizeof(key->dst));
201 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
202 struct flow_dissector_key_ipv6_addrs *key =
203 skb_flow_dissector_target(f->dissector,
204 FLOW_DISSECTOR_KEY_IPV6_ADDRS,
206 struct flow_dissector_key_ipv6_addrs *mask =
207 skb_flow_dissector_target(f->dissector,
208 FLOW_DISSECTOR_KEY_IPV6_ADDRS,
211 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
212 src_ipv4_src_ipv6.ipv6_layout.ipv6),
213 &mask->src, sizeof(mask->src));
214 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
215 src_ipv4_src_ipv6.ipv6_layout.ipv6),
216 &key->src, sizeof(key->src));
218 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
219 dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
220 &mask->dst, sizeof(mask->dst));
221 memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
222 dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
223 &key->dst, sizeof(key->dst));
226 if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
227 struct flow_dissector_key_ports *key =
228 skb_flow_dissector_target(f->dissector,
229 FLOW_DISSECTOR_KEY_PORTS,
231 struct flow_dissector_key_ports *mask =
232 skb_flow_dissector_target(f->dissector,
233 FLOW_DISSECTOR_KEY_PORTS,
237 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
238 tcp_sport, ntohs(mask->src));
239 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
240 tcp_sport, ntohs(key->src));
242 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
243 tcp_dport, ntohs(mask->dst));
244 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
245 tcp_dport, ntohs(key->dst));
249 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
250 udp_sport, ntohs(mask->src));
251 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
252 udp_sport, ntohs(key->src));
254 MLX5_SET(fte_match_set_lyr_2_4, headers_c,
255 udp_dport, ntohs(mask->dst));
256 MLX5_SET(fte_match_set_lyr_2_4, headers_v,
257 udp_dport, ntohs(key->dst));
260 netdev_err(priv->netdev,
261 "Only UDP and TCP transport are supported\n");
269 static int parse_tc_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
270 u32 *action, u32 *flow_tag)
272 const struct tc_action *a;
274 if (tc_no_actions(exts))
277 *flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
280 tc_for_each_action(a, exts) {
281 /* Only support a single action per rule */
285 if (is_tcf_gact_shot(a)) {
286 *action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
290 if (is_tcf_skbedit_mark(a)) {
291 u32 mark = tcf_skbedit_mark(a);
293 if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
294 netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
300 *action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
310 int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
311 struct tc_cls_flower_offload *f)
313 struct mlx5e_tc_flow_table *tc = &priv->fts.tc;
319 struct mlx5e_tc_flow *flow;
320 struct mlx5_flow_rule *old = NULL;
322 flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
327 flow = kzalloc(sizeof(*flow), GFP_KERNEL);
329 match_c = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
330 match_v = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
331 if (!match_c || !match_v || !flow) {
336 flow->cookie = f->cookie;
338 err = parse_cls_flower(priv, match_c, match_v, f);
342 err = parse_tc_actions(priv, f->exts, &action, &flow_tag);
346 err = rhashtable_insert_fast(&tc->ht, &flow->node,
351 flow->rule = mlx5e_tc_add_flow(priv, match_c, match_v, action,
353 if (IS_ERR(flow->rule)) {
354 err = PTR_ERR(flow->rule);
359 mlx5e_tc_del_flow(priv, old);
364 rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
375 int mlx5e_delete_flower(struct mlx5e_priv *priv,
376 struct tc_cls_flower_offload *f)
378 struct mlx5e_tc_flow *flow;
379 struct mlx5e_tc_flow_table *tc = &priv->fts.tc;
381 flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
386 rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
388 mlx5e_tc_del_flow(priv, flow->rule);
395 static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
396 .head_offset = offsetof(struct mlx5e_tc_flow, node),
397 .key_offset = offsetof(struct mlx5e_tc_flow, cookie),
398 .key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
399 .automatic_shrinking = true,
402 int mlx5e_tc_init(struct mlx5e_priv *priv)
404 struct mlx5e_tc_flow_table *tc = &priv->fts.tc;
406 tc->ht_params = mlx5e_tc_flow_ht_params;
407 return rhashtable_init(&tc->ht, &tc->ht_params);
410 static void _mlx5e_tc_del_flow(void *ptr, void *arg)
412 struct mlx5e_tc_flow *flow = ptr;
413 struct mlx5e_priv *priv = arg;
415 mlx5e_tc_del_flow(priv, flow->rule);
419 void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
421 struct mlx5e_tc_flow_table *tc = &priv->fts.tc;
423 rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);
425 if (!IS_ERR_OR_NULL(priv->fts.tc.t)) {
426 mlx5_destroy_flow_table(priv->fts.tc.t);
427 priv->fts.tc.t = NULL;