net/mlx5_core: Introduce flow steering firmware commands

Introduce new Flow Steering (FS) firmware commands,
in-order to support the new flow steering infrastructure.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/Makefile

@@ -2,7 +2,7 @@ obj-$(CONFIG_MLX5_CORE)		+= mlx5_core.o
 
 mlx5_core-y :=	main.o cmd.o debugfs.o fw.o eq.o uar.o pagealloc.o \
 		health.o mcg.o cq.o srq.o alloc.o qp.o port.o mr.o pd.o   \
-		mad.o transobj.o vport.o sriov.o
+		mad.o transobj.o vport.o sriov.o fs_cmd.o
 mlx5_core-$(CONFIG_MLX5_CORE_EN) += wq.o flow_table.o eswitch.o \
 		en_main.o en_flow_table.o en_ethtool.o en_tx.o en_rx.o \
 		en_txrx.o

drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c

@@ -0,0 +1,239 @@
+/*
+ * Copyright (c) 2015, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/mlx5/driver.h>
+#include <linux/mlx5/device.h>
+#include <linux/mlx5/mlx5_ifc.h>
+
+#include "fs_core.h"
+#include "fs_cmd.h"
+#include "mlx5_core.h"
+
+int mlx5_cmd_create_flow_table(struct mlx5_core_dev *dev,
+			       enum fs_flow_table_type type, unsigned int level,
+			       unsigned int log_size, unsigned int *table_id)
+{
+	u32 out[MLX5_ST_SZ_DW(create_flow_table_out)];
+	u32 in[MLX5_ST_SZ_DW(create_flow_table_in)];
+	int err;
+
+	memset(in, 0, sizeof(in));
+
+	MLX5_SET(create_flow_table_in, in, opcode,
+		 MLX5_CMD_OP_CREATE_FLOW_TABLE);
+
+	MLX5_SET(create_flow_table_in, in, table_type, type);
+	MLX5_SET(create_flow_table_in, in, level, level);
+	MLX5_SET(create_flow_table_in, in, log_size, log_size);
+
+	memset(out, 0, sizeof(out));
+	err = mlx5_cmd_exec_check_status(dev, in, sizeof(in), out,
+					 sizeof(out));
+
+	if (!err)
+		*table_id = MLX5_GET(create_flow_table_out, out,
+				     table_id);
+	return err;
+}
+
+int mlx5_cmd_destroy_flow_table(struct mlx5_core_dev *dev,
+				struct mlx5_flow_table *ft)
+{
+	u32 in[MLX5_ST_SZ_DW(destroy_flow_table_in)];
+	u32 out[MLX5_ST_SZ_DW(destroy_flow_table_out)];
+
+	memset(in, 0, sizeof(in));
+	memset(out, 0, sizeof(out));
+
+	MLX5_SET(destroy_flow_table_in, in, opcode,
+		 MLX5_CMD_OP_DESTROY_FLOW_TABLE);
+	MLX5_SET(destroy_flow_table_in, in, table_type, ft->type);
+	MLX5_SET(destroy_flow_table_in, in, table_id, ft->id);
+
+	return mlx5_cmd_exec_check_status(dev, in, sizeof(in), out,
+					  sizeof(out));
+}
+
+int mlx5_cmd_create_flow_group(struct mlx5_core_dev *dev,
+			       struct mlx5_flow_table *ft,
+			       u32 *in,
+			       unsigned int *group_id)
+{
+	int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
+	u32 out[MLX5_ST_SZ_DW(create_flow_group_out)];
+	int err;
+
+	memset(out, 0, sizeof(out));
+
+	MLX5_SET(create_flow_group_in, in, opcode,
+		 MLX5_CMD_OP_CREATE_FLOW_GROUP);
+	MLX5_SET(create_flow_group_in, in, table_type, ft->type);
+	MLX5_SET(create_flow_group_in, in, table_id, ft->id);
+
+	err = mlx5_cmd_exec_check_status(dev, in,
+					 inlen, out,
+					 sizeof(out));
+	if (!err)
+		*group_id = MLX5_GET(create_flow_group_out, out,
+				     group_id);
+
+	return err;
+}
+
+int mlx5_cmd_destroy_flow_group(struct mlx5_core_dev *dev,
+				struct mlx5_flow_table *ft,
+				unsigned int group_id)
+{
+	u32 out[MLX5_ST_SZ_DW(destroy_flow_group_out)];
+	u32 in[MLX5_ST_SZ_DW(destroy_flow_group_in)];
+
+	memset(in, 0, sizeof(in));
+	memset(out, 0, sizeof(out));
+
+	MLX5_SET(destroy_flow_group_in, in, opcode,
+		 MLX5_CMD_OP_DESTROY_FLOW_GROUP);
+	MLX5_SET(destroy_flow_group_in, in, table_type, ft->type);
+	MLX5_SET(destroy_flow_group_in, in, table_id, ft->id);
+	MLX5_SET(destroy_flow_group_in, in, group_id, group_id);
+
+	return mlx5_cmd_exec_check_status(dev, in, sizeof(in), out,
+					  sizeof(out));
+}
+
+static int mlx5_cmd_set_fte(struct mlx5_core_dev *dev,
+			    int opmod, int modify_mask,
+			    struct mlx5_flow_table *ft,
+			    unsigned group_id,
+			    struct fs_fte *fte)
+{
+	unsigned int inlen = MLX5_ST_SZ_BYTES(set_fte_in) +
+		fte->dests_size * MLX5_ST_SZ_BYTES(dest_format_struct);
+	u32 out[MLX5_ST_SZ_DW(set_fte_out)];
+	struct mlx5_flow_rule *dst;
+	void *in_flow_context;
+	void *in_match_value;
+	void *in_dests;
+	u32 *in;
+	int err;
+
+	in = mlx5_vzalloc(inlen);
+	if (!in) {
+		mlx5_core_warn(dev, "failed to allocate inbox\n");
+		return -ENOMEM;
+	}
+
+	MLX5_SET(set_fte_in, in, opcode, MLX5_CMD_OP_SET_FLOW_TABLE_ENTRY);
+	MLX5_SET(set_fte_in, in, op_mod, opmod);
+	MLX5_SET(set_fte_in, in, modify_enable_mask, modify_mask);
+	MLX5_SET(set_fte_in, in, table_type, ft->type);
+	MLX5_SET(set_fte_in, in, table_id,   ft->id);
+	MLX5_SET(set_fte_in, in, flow_index, fte->index);
+
+	in_flow_context = MLX5_ADDR_OF(set_fte_in, in, flow_context);
+	MLX5_SET(flow_context, in_flow_context, group_id, group_id);
+	MLX5_SET(flow_context, in_flow_context, flow_tag, fte->flow_tag);
+	MLX5_SET(flow_context, in_flow_context, action, fte->action);
+	MLX5_SET(flow_context, in_flow_context, destination_list_size,
+		 fte->dests_size);
+	in_match_value = MLX5_ADDR_OF(flow_context, in_flow_context,
+				      match_value);
+	memcpy(in_match_value, &fte->val, MLX5_ST_SZ_BYTES(fte_match_param));
+
+	in_dests = MLX5_ADDR_OF(flow_context, in_flow_context, destination);
+	list_for_each_entry(dst, &fte->node.children, node.list) {
+		unsigned int id;
+
+		MLX5_SET(dest_format_struct, in_dests, destination_type,
+			 dst->dest_attr.type);
+		if (dst->dest_attr.type ==
+		    MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE)
+			id = dst->dest_attr.ft->id;
+		else
+			id = dst->dest_attr.tir_num;
+		MLX5_SET(dest_format_struct, in_dests, destination_id, id);
+		in_dests += MLX5_ST_SZ_BYTES(dest_format_struct);
+	}
+	memset(out, 0, sizeof(out));
+	err = mlx5_cmd_exec_check_status(dev, in, inlen, out,
+					 sizeof(out));
+	kvfree(in);
+
+	return err;
+}
+
+int mlx5_cmd_create_fte(struct mlx5_core_dev *dev,
+			struct mlx5_flow_table *ft,
+			unsigned group_id,
+			struct fs_fte *fte)
+{
+	return	mlx5_cmd_set_fte(dev, 0, 0, ft, group_id, fte);
+}
+
+int mlx5_cmd_update_fte(struct mlx5_core_dev *dev,
+			struct mlx5_flow_table *ft,
+			unsigned group_id,
+			struct fs_fte *fte)
+{
+	int opmod;
+	int modify_mask;
+	int atomic_mod_cap = MLX5_CAP_FLOWTABLE(dev,
+						flow_table_properties_nic_receive.
+						flow_modify_en);
+	if (!atomic_mod_cap)
+		return -ENOTSUPP;
+	opmod = 1;
+	modify_mask = 1 <<
+		MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST;
+
+	return	mlx5_cmd_set_fte(dev, opmod, modify_mask, ft, group_id, fte);
+}
+
+int mlx5_cmd_delete_fte(struct mlx5_core_dev *dev,
+			struct mlx5_flow_table *ft,
+			unsigned int index)
+{
+	u32 out[MLX5_ST_SZ_DW(delete_fte_out)];
+	u32 in[MLX5_ST_SZ_DW(delete_fte_in)];
+	int err;
+
+	memset(in, 0, sizeof(in));
+	memset(out, 0, sizeof(out));
+
+	MLX5_SET(delete_fte_in, in, opcode, MLX5_CMD_OP_DELETE_FLOW_TABLE_ENTRY);
+	MLX5_SET(delete_fte_in, in, table_type, ft->type);
+	MLX5_SET(delete_fte_in, in, table_id, ft->id);
+	MLX5_SET(delete_fte_in, in, flow_index, index);
+
+	err =  mlx5_cmd_exec_check_status(dev, in, sizeof(in), out, sizeof(out));
+
+	return err;
+}

drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.h

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2015, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _MLX5_FS_CMD_
+#define _MLX5_FS_CMD_
+
+int mlx5_cmd_create_flow_table(struct mlx5_core_dev *dev,
+			       enum fs_flow_table_type type, unsigned int level,
+			       unsigned int log_size, unsigned int *table_id);
+
+int mlx5_cmd_destroy_flow_table(struct mlx5_core_dev *dev,
+				struct mlx5_flow_table *ft);
+
+int mlx5_cmd_create_flow_group(struct mlx5_core_dev *dev,
+			       struct mlx5_flow_table *ft,
+			       u32 *in, unsigned int *group_id);
+
+int mlx5_cmd_destroy_flow_group(struct mlx5_core_dev *dev,
+				struct mlx5_flow_table *ft,
+				unsigned int group_id);
+
+int mlx5_cmd_create_fte(struct mlx5_core_dev *dev,
+			struct mlx5_flow_table *ft,
+			unsigned group_id,
+			struct fs_fte *fte);
+
+int mlx5_cmd_update_fte(struct mlx5_core_dev *dev,
+			struct mlx5_flow_table *ft,
+			unsigned group_id,
+			struct fs_fte *fte);
+
+int mlx5_cmd_delete_fte(struct mlx5_core_dev *dev,
+			struct mlx5_flow_table *ft,
+			unsigned int index);
+
+#endif

drivers/net/ethernet/mellanox/mlx5/core/fs_core.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2015, Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _MLX5_FS_CORE_
+#define _MLX5_FS_CORE_
+
+#include <linux/mlx5/fs.h>
+
+enum fs_node_type {
+	FS_TYPE_NAMESPACE,
+	FS_TYPE_PRIO,
+	FS_TYPE_FLOW_TABLE,
+	FS_TYPE_FLOW_GROUP,
+	FS_TYPE_FLOW_ENTRY,
+	FS_TYPE_FLOW_DEST
+};
+
+enum fs_flow_table_type {
+	FS_FT_NIC_RX	 = 0x0,
+};
+
+enum fs_fte_status {
+	FS_FTE_STATUS_EXISTING = 1UL << 0,
+};
+
+struct fs_node {
+	struct list_head	list;
+	struct list_head	children;
+	enum fs_node_type	type;
+};
+
+struct mlx5_flow_rule {
+	struct fs_node				node;
+	struct mlx5_flow_destination		dest_attr;
+};
+
+struct mlx5_flow_table {
+	struct fs_node			node;
+	u32				id;
+	enum fs_flow_table_type		type;
+};
+
+struct fs_fte {
+	struct fs_node			node;
+	u32				val[MLX5_ST_SZ_DW(fte_match_param)];
+	u32				dests_size;
+	u32				flow_tag;
+	u32				index;
+	u32				action;
+};
+
+#endif