net/mlx5: HWS, added modify header pattern and args handling

Packet headers/metadta manipulations are split into two parts:
 - Header Modify Pattern: an object that describes which fields
   will be modified and in which way
 - Header Modify Argument: an object that provides the values
   to be used for header modification
Reviewed-by: Hamdan Agbariya <hamdani@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_pat_arg.h

+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2024 NVIDIA Corporation & Affiliates */
+
+#ifndef MLX5HWS_PAT_ARG_H_
+#define MLX5HWS_PAT_ARG_H_
+
+/* Modify-header arg pool */
+enum mlx5hws_arg_chunk_size {
+	MLX5HWS_ARG_CHUNK_SIZE_1,
+	/* Keep MIN updated when changing */
+	MLX5HWS_ARG_CHUNK_SIZE_MIN = MLX5HWS_ARG_CHUNK_SIZE_1,
+	MLX5HWS_ARG_CHUNK_SIZE_2,
+	MLX5HWS_ARG_CHUNK_SIZE_3,
+	MLX5HWS_ARG_CHUNK_SIZE_4,
+	MLX5HWS_ARG_CHUNK_SIZE_MAX,
+};
+
+enum {
+	MLX5HWS_MODIFY_ACTION_SIZE = 8,
+	MLX5HWS_ARG_DATA_SIZE = 64,
+};
+
+struct mlx5hws_pattern_cache {
+	struct mutex lock; /* Protect pattern list */
+	struct list_head ptrn_list;
+};
+
+struct mlx5hws_pattern_cache_item {
+	struct {
+		u32 pattern_id;
+		u8 *data;
+		u16 num_of_actions;
+	} mh_data;
+	u32 refcount;
+	struct list_head ptrn_list_node;
+};
+
+enum mlx5hws_arg_chunk_size
+mlx5hws_arg_get_arg_log_size(u16 num_of_actions);
+
+u32 mlx5hws_arg_get_arg_size(u16 num_of_actions);
+
+enum mlx5hws_arg_chunk_size
+mlx5hws_arg_data_size_to_arg_log_size(u16 data_size);
+
+u32 mlx5hws_arg_data_size_to_arg_size(u16 data_size);
+
+int mlx5hws_pat_init_pattern_cache(struct mlx5hws_pattern_cache **cache);
+
+void mlx5hws_pat_uninit_pattern_cache(struct mlx5hws_pattern_cache *cache);
+
+bool mlx5hws_pat_verify_actions(struct mlx5hws_context *ctx, __be64 pattern[], size_t sz);
+
+int mlx5hws_arg_create(struct mlx5hws_context *ctx,
+		       u8 *data,
+		       size_t data_sz,
+		       u32 log_bulk_sz,
+		       bool write_data,
+		       u32 *arg_id);
+
+void mlx5hws_arg_destroy(struct mlx5hws_context *ctx, u32 arg_id);
+
+int mlx5hws_arg_create_modify_header_arg(struct mlx5hws_context *ctx,
+					 __be64 *data,
+					 u8 num_of_actions,
+					 u32 log_bulk_sz,
+					 bool write_data,
+					 u32 *modify_hdr_arg_id);
+
+int mlx5hws_pat_get_pattern(struct mlx5hws_context *ctx,
+			    __be64 *pattern,
+			    size_t pattern_sz,
+			    u32 *ptrn_id);
+
+void mlx5hws_pat_put_pattern(struct mlx5hws_context *ctx,
+			     u32 ptrn_id);
+
+bool mlx5hws_arg_is_valid_arg_request_size(struct mlx5hws_context *ctx,
+					   u32 arg_size);
+
+bool mlx5hws_pat_require_reparse(__be64 *actions, u16 num_of_actions);
+
+void mlx5hws_arg_write(struct mlx5hws_send_engine *queue,
+		       void *comp_data,
+		       u32 arg_idx,
+		       u8 *arg_data,
+		       size_t data_size);
+
+void mlx5hws_arg_decapl3_write(struct mlx5hws_send_engine *queue,
+			       u32 arg_idx,
+			       u8 *arg_data,
+			       u16 num_of_actions);
+
+int mlx5hws_arg_write_inline_arg_data(struct mlx5hws_context *ctx,
+				      u32 arg_idx,
+				      u8 *arg_data,
+				      size_t data_size);
+
+void mlx5hws_pat_calc_nope(__be64 *pattern, size_t num_actions, size_t max_actions,
+			   size_t *new_size, u32 *nope_location, __be64 *new_pat);
+#endif /* MLX5HWS_PAT_ARG_H_ */