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@@ -0,0 +1,429 @@
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+/*
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+ * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
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+ *
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+ * This software is available to you under a choice of one of two
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+ * licenses. You may choose to be licensed under the terms of the GNU
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+ * General Public License (GPL) Version 2, available from the file
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+ * COPYING in the main directory of this source tree, or the
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+ * OpenIB.org BSD license below:
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+ *
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+ * Redistribution and use in source and binary forms, with or
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+ * without modification, are permitted provided that the following
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+ * conditions are met:
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+ *
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+ * - Redistributions of source code must retain the above
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+ * copyright notice, this list of conditions and the following
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+ * disclaimer.
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+ *
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+ * - Redistributions in binary form must reproduce the above
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+ * copyright notice, this list of conditions and the following
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+ * disclaimer in the documentation and/or other materials
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+ * provided with the distribution.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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+ * SOFTWARE.
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+ */
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+
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+#include <net/flow_dissector.h>
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+#include <net/pkt_cls.h>
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+#include <net/tc_act/tc_gact.h>
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+#include <net/tc_act/tc_skbedit.h>
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+#include <linux/mlx5/fs.h>
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+#include <linux/mlx5/device.h>
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+#include <linux/rhashtable.h>
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+#include "en.h"
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+#include "en_tc.h"
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+
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+struct mlx5e_tc_flow {
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+ struct rhash_head node;
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+ u64 cookie;
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+ struct mlx5_flow_rule *rule;
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+};
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+
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+#define MLX5E_TC_FLOW_TABLE_NUM_ENTRIES 1024
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+#define MLX5E_TC_FLOW_TABLE_NUM_GROUPS 4
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+
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+static struct mlx5_flow_rule *mlx5e_tc_add_flow(struct mlx5e_priv *priv,
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+ u32 *match_c, u32 *match_v,
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+ u32 action, u32 flow_tag)
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+{
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+ struct mlx5_flow_destination dest = {
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+ .type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE,
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+ {.ft = priv->fts.vlan.t},
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+ };
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+ struct mlx5_flow_rule *rule;
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+ bool table_created = false;
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+
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+ if (IS_ERR_OR_NULL(priv->fts.tc.t)) {
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+ priv->fts.tc.t =
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+ mlx5_create_auto_grouped_flow_table(priv->fts.ns, 0,
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+ MLX5E_TC_FLOW_TABLE_NUM_ENTRIES,
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+ MLX5E_TC_FLOW_TABLE_NUM_GROUPS);
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+ if (IS_ERR(priv->fts.tc.t)) {
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+ netdev_err(priv->netdev,
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+ "Failed to create tc offload table\n");
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+ return ERR_CAST(priv->fts.tc.t);
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+ }
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+
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+ table_created = true;
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+ }
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+
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+ rule = mlx5_add_flow_rule(priv->fts.tc.t, MLX5_MATCH_OUTER_HEADERS,
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+ match_c, match_v,
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+ action, flow_tag,
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+ action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST ? &dest : NULL);
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+
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+ if (IS_ERR(rule) && table_created) {
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+ mlx5_destroy_flow_table(priv->fts.tc.t);
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+ priv->fts.tc.t = NULL;
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+ }
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+
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+ return rule;
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+}
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+
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+static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
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+ struct mlx5_flow_rule *rule)
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+{
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+ mlx5_del_flow_rule(rule);
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+
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+ if (!mlx5e_tc_num_filters(priv)) {
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+ mlx5_destroy_flow_table(priv->fts.tc.t);
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+ priv->fts.tc.t = NULL;
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+ }
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+}
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+
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+static int parse_cls_flower(struct mlx5e_priv *priv,
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+ u32 *match_c, u32 *match_v,
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+ struct tc_cls_flower_offload *f)
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+{
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+ void *headers_c = MLX5_ADDR_OF(fte_match_param, match_c, outer_headers);
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+ void *headers_v = MLX5_ADDR_OF(fte_match_param, match_v, outer_headers);
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+ u16 addr_type = 0;
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+ u8 ip_proto = 0;
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+
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+ if (f->dissector->used_keys &
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+ ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
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+ BIT(FLOW_DISSECTOR_KEY_BASIC) |
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+ BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
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+ BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
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+ BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
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+ BIT(FLOW_DISSECTOR_KEY_PORTS))) {
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+ netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
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+ f->dissector->used_keys);
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+ return -EOPNOTSUPP;
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+ }
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+
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+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
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+ struct flow_dissector_key_control *key =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_BASIC,
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+ f->key);
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+ addr_type = key->addr_type;
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+ }
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+
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+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
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+ struct flow_dissector_key_basic *key =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_BASIC,
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+ f->key);
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+ struct flow_dissector_key_basic *mask =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_BASIC,
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+ f->mask);
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+ ip_proto = key->ip_proto;
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+
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
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+ ntohs(mask->n_proto));
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
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+ ntohs(key->n_proto));
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+
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_c, ip_protocol,
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+ mask->ip_proto);
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol,
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+ key->ip_proto);
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+ }
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+
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+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
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+ struct flow_dissector_key_eth_addrs *key =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_ETH_ADDRS,
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+ f->key);
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+ struct flow_dissector_key_eth_addrs *mask =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_ETH_ADDRS,
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+ f->mask);
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+
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+ ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
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+ dmac_47_16),
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+ mask->dst);
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+ ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
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+ dmac_47_16),
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+ key->dst);
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+
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+ ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
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+ smac_47_16),
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+ mask->src);
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+ ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
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+ smac_47_16),
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+ key->src);
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+ }
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+
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+ if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
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+ struct flow_dissector_key_ipv4_addrs *key =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_IPV4_ADDRS,
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+ f->key);
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+ struct flow_dissector_key_ipv4_addrs *mask =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_IPV4_ADDRS,
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+ f->mask);
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+
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+ memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
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+ src_ipv4_src_ipv6.ipv4_layout.ipv4),
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+ &mask->src, sizeof(mask->src));
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+ memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
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+ src_ipv4_src_ipv6.ipv4_layout.ipv4),
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+ &key->src, sizeof(key->src));
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+ memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
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+ dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
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+ &mask->dst, sizeof(mask->dst));
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+ memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
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+ dst_ipv4_dst_ipv6.ipv4_layout.ipv4),
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+ &key->dst, sizeof(key->dst));
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+ }
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+
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+ if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
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+ struct flow_dissector_key_ipv6_addrs *key =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_IPV6_ADDRS,
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+ f->key);
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+ struct flow_dissector_key_ipv6_addrs *mask =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_IPV6_ADDRS,
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+ f->mask);
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+
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+ memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
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+ src_ipv4_src_ipv6.ipv6_layout.ipv6),
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+ &mask->src, sizeof(mask->src));
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+ memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
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+ src_ipv4_src_ipv6.ipv6_layout.ipv6),
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+ &key->src, sizeof(key->src));
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+
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+ memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
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+ dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
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+ &mask->dst, sizeof(mask->dst));
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+ memcpy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
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+ dst_ipv4_dst_ipv6.ipv6_layout.ipv6),
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+ &key->dst, sizeof(key->dst));
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+ }
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+
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+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
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+ struct flow_dissector_key_ports *key =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_PORTS,
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+ f->key);
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+ struct flow_dissector_key_ports *mask =
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+ skb_flow_dissector_target(f->dissector,
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+ FLOW_DISSECTOR_KEY_PORTS,
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+ f->mask);
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+ switch (ip_proto) {
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+ case IPPROTO_TCP:
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_c,
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+ tcp_sport, ntohs(mask->src));
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_v,
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+ tcp_sport, ntohs(key->src));
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+
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_c,
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+ tcp_dport, ntohs(mask->dst));
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_v,
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+ tcp_dport, ntohs(key->dst));
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+ break;
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+
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+ case IPPROTO_UDP:
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_c,
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+ udp_sport, ntohs(mask->src));
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_v,
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+ udp_sport, ntohs(key->src));
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+
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_c,
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+ udp_dport, ntohs(mask->dst));
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+ MLX5_SET(fte_match_set_lyr_2_4, headers_v,
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+ udp_dport, ntohs(key->dst));
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+ break;
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+ default:
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+ netdev_err(priv->netdev,
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+ "Only UDP and TCP transport are supported\n");
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+ return -EINVAL;
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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+static int parse_tc_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,
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+ u32 *action, u32 *flow_tag)
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+{
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+ const struct tc_action *a;
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+
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+ if (tc_no_actions(exts))
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+ return -EINVAL;
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+
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+ *flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
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+ *action = 0;
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+
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+ tc_for_each_action(a, exts) {
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+ /* Only support a single action per rule */
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+ if (*action)
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+ return -EINVAL;
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+
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+ if (is_tcf_gact_shot(a)) {
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+ *action |= MLX5_FLOW_CONTEXT_ACTION_DROP;
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+ continue;
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+ }
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+
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+ if (is_tcf_skbedit_mark(a)) {
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+ u32 mark = tcf_skbedit_mark(a);
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+
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+ if (mark & ~MLX5E_TC_FLOW_ID_MASK) {
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+ netdev_warn(priv->netdev, "Bad flow mark - only 16 bit is supported: 0x%x\n",
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+ mark);
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+ return -EINVAL;
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+ }
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+
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+ *flow_tag = mark;
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+ *action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
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+ continue;
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+ }
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+
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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+int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,
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+ struct tc_cls_flower_offload *f)
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+{
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+ struct mlx5e_tc_flow_table *tc = &priv->fts.tc;
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+ u32 *match_c;
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+ u32 *match_v;
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+ int err = 0;
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+ u32 flow_tag;
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+ u32 action;
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+ struct mlx5e_tc_flow *flow;
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+ struct mlx5_flow_rule *old = NULL;
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+
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+ flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
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+ tc->ht_params);
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+ if (flow)
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+ old = flow->rule;
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+ else
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+ flow = kzalloc(sizeof(*flow), GFP_KERNEL);
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+
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+ match_c = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
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+ match_v = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);
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+ if (!match_c || !match_v || !flow) {
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+ err = -ENOMEM;
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+ goto err_free;
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+ }
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+
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+ flow->cookie = f->cookie;
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+
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+ err = parse_cls_flower(priv, match_c, match_v, f);
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+ if (err < 0)
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+ goto err_free;
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+
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+ err = parse_tc_actions(priv, f->exts, &action, &flow_tag);
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+ if (err < 0)
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+ goto err_free;
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+
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+ err = rhashtable_insert_fast(&tc->ht, &flow->node,
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+ tc->ht_params);
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+ if (err)
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+ goto err_free;
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+
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+ flow->rule = mlx5e_tc_add_flow(priv, match_c, match_v, action,
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+ flow_tag);
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+ if (IS_ERR(flow->rule)) {
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+ err = PTR_ERR(flow->rule);
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+ goto err_hash_del;
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+ }
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+
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+ if (old)
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+ mlx5e_tc_del_flow(priv, old);
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+
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+ goto out;
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+
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+err_hash_del:
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+ rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
|
|
|
+
|
|
|
+err_free:
|
|
|
+ if (!old)
|
|
|
+ kfree(flow);
|
|
|
+out:
|
|
|
+ kfree(match_c);
|
|
|
+ kfree(match_v);
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+int mlx5e_delete_flower(struct mlx5e_priv *priv,
|
|
|
+ struct tc_cls_flower_offload *f)
|
|
|
+{
|
|
|
+ struct mlx5e_tc_flow *flow;
|
|
|
+ struct mlx5e_tc_flow_table *tc = &priv->fts.tc;
|
|
|
+
|
|
|
+ flow = rhashtable_lookup_fast(&tc->ht, &f->cookie,
|
|
|
+ tc->ht_params);
|
|
|
+ if (!flow)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ rhashtable_remove_fast(&tc->ht, &flow->node, tc->ht_params);
|
|
|
+
|
|
|
+ mlx5e_tc_del_flow(priv, flow->rule);
|
|
|
+
|
|
|
+ kfree(flow);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct rhashtable_params mlx5e_tc_flow_ht_params = {
|
|
|
+ .head_offset = offsetof(struct mlx5e_tc_flow, node),
|
|
|
+ .key_offset = offsetof(struct mlx5e_tc_flow, cookie),
|
|
|
+ .key_len = sizeof(((struct mlx5e_tc_flow *)0)->cookie),
|
|
|
+ .automatic_shrinking = true,
|
|
|
+};
|
|
|
+
|
|
|
+int mlx5e_tc_init(struct mlx5e_priv *priv)
|
|
|
+{
|
|
|
+ struct mlx5e_tc_flow_table *tc = &priv->fts.tc;
|
|
|
+
|
|
|
+ tc->ht_params = mlx5e_tc_flow_ht_params;
|
|
|
+ return rhashtable_init(&tc->ht, &tc->ht_params);
|
|
|
+}
|
|
|
+
|
|
|
+static void _mlx5e_tc_del_flow(void *ptr, void *arg)
|
|
|
+{
|
|
|
+ struct mlx5e_tc_flow *flow = ptr;
|
|
|
+ struct mlx5e_priv *priv = arg;
|
|
|
+
|
|
|
+ mlx5e_tc_del_flow(priv, flow->rule);
|
|
|
+ kfree(flow);
|
|
|
+}
|
|
|
+
|
|
|
+void mlx5e_tc_cleanup(struct mlx5e_priv *priv)
|
|
|
+{
|
|
|
+ struct mlx5e_tc_flow_table *tc = &priv->fts.tc;
|
|
|
+
|
|
|
+ rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, priv);
|
|
|
+
|
|
|
+ if (!IS_ERR_OR_NULL(priv->fts.tc.t)) {
|
|
|
+ mlx5_destroy_flow_table(priv->fts.tc.t);
|
|
|
+ priv->fts.tc.t = NULL;
|
|
|
+ }
|
|
|
+}
|
David S. Miller