--- /dev/null
+/*
+ * drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
+ * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2017 Jiri Pirko <jiri@mellanox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the names of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <net/flow_dissector.h>
+#include <net/pkt_cls.h>
+#include <net/tc_act/tc_gact.h>
+#include <net/tc_act/tc_mirred.h>
+
+#include "spectrum.h"
+#include "core_acl_flex_keys.h"
+
+static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
+ struct net_device *dev,
+ struct mlxsw_sp_acl_rule_info *rulei,
+ struct tcf_exts *exts)
+{
+ const struct tc_action *a;
+ LIST_HEAD(actions);
+ int err;
+
+ if (tc_no_actions(exts))
+ return 0;
+
+ tcf_exts_to_list(exts, &actions);
+ list_for_each_entry(a, &actions, list) {
+ if (is_tcf_gact_shot(a)) {
+ err = mlxsw_sp_acl_rulei_act_drop(rulei);
+ if (err)
+ return err;
+ } else if (is_tcf_mirred_egress_redirect(a)) {
+ int ifindex = tcf_mirred_ifindex(a);
+ struct net_device *out_dev;
+
+ out_dev = __dev_get_by_index(dev_net(dev), ifindex);
+ if (out_dev == dev)
+ out_dev = NULL;
+
+ err = mlxsw_sp_acl_rulei_act_fwd(mlxsw_sp, rulei,
+ out_dev);
+ if (err)
+ return err;
+ } else {
+ dev_err(mlxsw_sp->bus_info->dev, "Unsupported action\n");
+ return -EOPNOTSUPP;
+ }
+ }
+ return 0;
+}
+
+static void mlxsw_sp_flower_parse_ipv4(struct mlxsw_sp_acl_rule_info *rulei,
+ struct tc_cls_flower_offload *f)
+{
+ struct flow_dissector_key_ipv4_addrs *key =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_IPV4_ADDRS,
+ f->key);
+ struct flow_dissector_key_ipv4_addrs *mask =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_IPV4_ADDRS,
+ f->mask);
+
+ mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_IP4,
+ ntohl(key->src), ntohl(mask->src));
+ mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_IP4,
+ ntohl(key->dst), ntohl(mask->dst));
+}
+
+static void mlxsw_sp_flower_parse_ipv6(struct mlxsw_sp_acl_rule_info *rulei,
+ struct tc_cls_flower_offload *f)
+{
+ struct flow_dissector_key_ipv6_addrs *key =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+ f->key);
+ struct flow_dissector_key_ipv6_addrs *mask =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_IPV6_ADDRS,
+ f->mask);
+ size_t addr_half_size = sizeof(key->src) / 2;
+
+ mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_HI,
+ &key->src.s6_addr[0],
+ &mask->src.s6_addr[0],
+ addr_half_size);
+ mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP6_LO,
+ &key->src.s6_addr[addr_half_size],
+ &mask->src.s6_addr[addr_half_size],
+ addr_half_size);
+ mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_HI,
+ &key->dst.s6_addr[0],
+ &mask->dst.s6_addr[0],
+ addr_half_size);
+ mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP6_LO,
+ &key->dst.s6_addr[addr_half_size],
+ &mask->dst.s6_addr[addr_half_size],
+ addr_half_size);
+}
+
+static int mlxsw_sp_flower_parse_ports(struct mlxsw_sp *mlxsw_sp,
+ struct mlxsw_sp_acl_rule_info *rulei,
+ struct tc_cls_flower_offload *f,
+ u8 ip_proto)
+{
+ struct flow_dissector_key_ports *key, *mask;
+
+ if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS))
+ return 0;
+
+ if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
+ dev_err(mlxsw_sp->bus_info->dev, "Only UDP and TCP keys are supported\n");
+ return -EINVAL;
+ }
+
+ key = skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_PORTS,
+ f->key);
+ mask = skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_PORTS,
+ f->mask);
+ mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_L4_PORT,
+ ntohs(key->dst), ntohs(mask->dst));
+ mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_L4_PORT,
+ ntohs(key->src), ntohs(mask->src));
+ return 0;
+}
+
+static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
+ struct net_device *dev,
+ struct mlxsw_sp_acl_rule_info *rulei,
+ struct tc_cls_flower_offload *f)
+{
+ u16 addr_type = 0;
+ u8 ip_proto = 0;
+ int err;
+
+ if (f->dissector->used_keys &
+ ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
+ BIT(FLOW_DISSECTOR_KEY_BASIC) |
+ BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
+ BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
+ BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
+ BIT(FLOW_DISSECTOR_KEY_PORTS))) {
+ dev_err(mlxsw_sp->bus_info->dev, "Unsupported key\n");
+ return -EOPNOTSUPP;
+ }
+
+ mlxsw_sp_acl_rulei_priority(rulei, f->prio);
+
+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
+ struct flow_dissector_key_control *key =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_CONTROL,
+ f->key);
+ addr_type = key->addr_type;
+ }
+
+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
+ struct flow_dissector_key_basic *key =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_BASIC,
+ f->key);
+ struct flow_dissector_key_basic *mask =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_BASIC,
+ f->mask);
+ ip_proto = key->ip_proto;
+ mlxsw_sp_acl_rulei_keymask_u32(rulei,
+ MLXSW_AFK_ELEMENT_ETHERTYPE,
+ ntohs(key->n_proto),
+ ntohs(mask->n_proto));
+ mlxsw_sp_acl_rulei_keymask_u32(rulei,
+ MLXSW_AFK_ELEMENT_IP_PROTO,
+ key->ip_proto, mask->ip_proto);
+ }
+
+ if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
+ struct flow_dissector_key_eth_addrs *key =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_ETH_ADDRS,
+ f->key);
+ struct flow_dissector_key_eth_addrs *mask =
+ skb_flow_dissector_target(f->dissector,
+ FLOW_DISSECTOR_KEY_ETH_ADDRS,
+ f->mask);
+
+ mlxsw_sp_acl_rulei_keymask_buf(rulei,
+ MLXSW_AFK_ELEMENT_DMAC,
+ key->dst, mask->dst,
+ sizeof(key->dst));
+ mlxsw_sp_acl_rulei_keymask_buf(rulei,
+ MLXSW_AFK_ELEMENT_SMAC,
+ key->src, mask->src,
+ sizeof(key->src));
+ }
+
+ if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS)
+ mlxsw_sp_flower_parse_ipv4(rulei, f);
+
+ if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS)
+ mlxsw_sp_flower_parse_ipv6(rulei, f);
+
+ err = mlxsw_sp_flower_parse_ports(mlxsw_sp, rulei, f, ip_proto);
+ if (err)
+ return err;
+
+ return mlxsw_sp_flower_parse_actions(mlxsw_sp, dev, rulei, f->exts);
+}
+
+int mlxsw_sp_flower_replace(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
+ __be16 protocol, struct tc_cls_flower_offload *f)
+{
+ struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+ struct net_device *dev = mlxsw_sp_port->dev;
+ struct mlxsw_sp_acl_rule_info *rulei;
+ struct mlxsw_sp_acl_ruleset *ruleset;
+ struct mlxsw_sp_acl_rule *rule;
+ int err;
+
+ ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, dev, ingress,
+ MLXSW_SP_ACL_PROFILE_FLOWER);
+ if (IS_ERR(ruleset))
+ return PTR_ERR(ruleset);
+
+ rule = mlxsw_sp_acl_rule_create(mlxsw_sp, ruleset, f->cookie);
+ if (IS_ERR(rule)) {
+ err = PTR_ERR(rule);
+ goto err_rule_create;
+ }
+
+ rulei = mlxsw_sp_acl_rule_rulei(rule);
+ err = mlxsw_sp_flower_parse(mlxsw_sp, dev, rulei, f);
+ if (err)
+ goto err_flower_parse;
+
+ err = mlxsw_sp_acl_rulei_commit(rulei);
+ if (err)
+ goto err_rulei_commit;
+
+ err = mlxsw_sp_acl_rule_add(mlxsw_sp, rule);
+ if (err)
+ goto err_rule_add;
+
+ mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
+ return 0;
+
+err_rule_add:
+err_rulei_commit:
+err_flower_parse:
+ mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
+err_rule_create:
+ mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
+ return err;
+}
+
+void mlxsw_sp_flower_destroy(struct mlxsw_sp_port *mlxsw_sp_port, bool ingress,
+ struct tc_cls_flower_offload *f)
+{
+ struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+ struct mlxsw_sp_acl_ruleset *ruleset;
+ struct mlxsw_sp_acl_rule *rule;
+
+ ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, mlxsw_sp_port->dev,
+ ingress,
+ MLXSW_SP_ACL_PROFILE_FLOWER);
+ if (WARN_ON(IS_ERR(ruleset)))
+ return;
+
+ rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
+ if (!WARN_ON(!rule)) {
+ mlxsw_sp_acl_rule_del(mlxsw_sp, rule);
+ mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
+ }
+
+ mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
+}
projects / platform / kernel / linux-rpi.git / commitdiff