mlxsw: core: Introduce flexible actions support

Each entry which is matched during ACL lookup points to an action set.
This action set contains up to three separate actions. If more actions
are needed to be chained, the extended set is created to hold them
in KVD linear area.

This patch implements handling of sets and encoding of actions.
Currectly, only two actions are supported. Drop and forward. Forward
action uses PBS pointer to KVD linear area, so the action code needs to
take care of this as well.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/Makefile

 obj-$(CONFIG_MLXSW_CORE)	+= mlxsw_core.o
-mlxsw_core-objs			:= core.o core_acl_flex_keys.o
+mlxsw_core-objs			:= core.o core_acl_flex_keys.o \
+				   core_acl_flex_actions.o
 mlxsw_core-$(CONFIG_MLXSW_CORE_HWMON) += core_hwmon.o
 mlxsw_core-$(CONFIG_MLXSW_CORE_THERMAL) += core_thermal.o
 obj-$(CONFIG_MLXSW_PCI)		+= mlxsw_pci.o

drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h

+/*
+ * drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h
+ * 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.
+ */
+
+#ifndef _MLXSW_CORE_ACL_FLEX_ACTIONS_H
+#define _MLXSW_CORE_ACL_FLEX_ACTIONS_H
+
+#include <linux/types.h>
+
+struct mlxsw_afa;
+struct mlxsw_afa_block;
+
+struct mlxsw_afa_ops {
+	int (*kvdl_set_add)(void *priv, u32 *p_kvdl_index,
+			    char *enc_actions, bool is_first);
+	void (*kvdl_set_del)(void *priv, u32 kvdl_index, bool is_first);
+	int (*kvdl_fwd_entry_add)(void *priv, u32 *p_kvdl_index, u8 local_port);
+	void (*kvdl_fwd_entry_del)(void *priv, u32 kvdl_index);
+};
+
+struct mlxsw_afa *mlxsw_afa_create(unsigned int max_acts_per_set,
+				   const struct mlxsw_afa_ops *ops,
+				   void *ops_priv);
+void mlxsw_afa_destroy(struct mlxsw_afa *mlxsw_afa);
+struct mlxsw_afa_block *mlxsw_afa_block_create(struct mlxsw_afa *mlxsw_afa);
+void mlxsw_afa_block_destroy(struct mlxsw_afa_block *block);
+int mlxsw_afa_block_commit(struct mlxsw_afa_block *block);
+char *mlxsw_afa_block_first_set(struct mlxsw_afa_block *block);
+u32 mlxsw_afa_block_first_set_kvdl_index(struct mlxsw_afa_block *block);
+void mlxsw_afa_block_continue(struct mlxsw_afa_block *block);
+void mlxsw_afa_block_jump(struct mlxsw_afa_block *block, u16 group_id);
+int mlxsw_afa_block_append_drop(struct mlxsw_afa_block *block);
+int mlxsw_afa_block_append_fwd(struct mlxsw_afa_block *block,
+			       u8 local_port, bool in_port);
+
+#endif