/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2019-2023 Broadcom
 * All rights reserved.
 */

#ifndef _TF_EM_COMMON_H_
#define _TF_EM_COMMON_H_

#include "hcapi_cfa_defs.h"
#include "tf_core.h"
#include "tf_session.h"
#include "ll.h"

/**
 * Function to search for table scope control block structure
 * with specified table scope ID.
 *
 * [in] tbl_scope_id
 *   Table scope ID to search for
 *
 * Returns:
 *  Pointer to the found table scope control block struct or NULL if
 *   table scope control block struct not found
 */
struct tf_tbl_scope_cb *tbl_scope_cb_find(uint32_t tbl_scope_id);

/**
 * Table scope control block content
 */
struct tf_em_caps {
	uint32_t flags;
	uint32_t supported;
	uint32_t max_entries_supported;
	uint16_t key_entry_size;
	uint16_t record_entry_size;
	uint16_t efc_entry_size;
};

/**
 *  EEM data
 *
 *  Link list of ext em data allocated and managed by EEM module
 *  for a TruFlow session.
 */
struct em_ext_db {
	struct ll tbl_scope_ll;
	struct rm_db *eem_db[TF_DIR_MAX];
};

/**
 * Table Scope Control Block
 *
 * Holds private data for a table scope.
 */
struct tf_tbl_scope_cb {
	/**
	 * Linked list of tbl_scope
	 */
	struct ll_entry ll_entry; /* For inserting in link list, must be
				   * first field of struct.
				   */

	uint32_t tbl_scope_id;

       /** The pf or parent pf of the vf used for table scope creation
	*/
	uint16_t pf;
	struct hcapi_cfa_em_ctx_mem_info em_ctx_info[TF_DIR_MAX];
	struct tf_em_caps em_caps[TF_DIR_MAX];
	struct stack ext_act_pool[TF_DIR_MAX];
	uint32_t *ext_act_pool_mem[TF_DIR_MAX];
};

/**
 * Create and initialize a stack to use for action entries
 *
 * [in] dir
 *   Direction
 * [in] tbl_scope_id
 *   Table scope ID
 * [in] num_entries
 *   Number of EEM entries
 * [in] entry_sz_bytes
 *   Size of the entry
 *
 * Returns:
 *   0       - Success
 *   -ENOMEM - Out of memory
 *   -EINVAL - Failure
 */
int tf_create_tbl_pool_external(enum tf_dir dir,
				struct tf_tbl_scope_cb *tbl_scope_cb,
				uint32_t num_entries,
				uint32_t entry_sz_bytes);

/**
 * Delete and cleanup action record allocation stack
 *
 * [in] dir
 *   Direction
 * [in] tbl_scope_id
 *   Table scope ID
 *
 */
void tf_destroy_tbl_pool_external(enum tf_dir dir,
				  struct tf_tbl_scope_cb *tbl_scope_cb);

/**
 * Get hash mask for current EEM table size
 *
 * [in] num_entries
 *   Number of EEM entries
 */
uint32_t tf_em_get_key_mask(int num_entries);

/**
 * Populate key_entry
 *
 * [in] result
 *   Entry data
 * [in] in_key
 *   Key data
 * [out] key_entry
 *   Completed key record
 */
void tf_em_create_key_entry(struct cfa_p4_eem_entry_hdr *result,
			    uint8_t	       *in_key,
			    struct cfa_p4_eem_64b_entry *key_entry);

/**
 * Find base page address for offset into specified table type
 *
 * [in] tbl_scope_cb
 *   Table scope
 * [in] dir
 *   Direction
 * [in] Offset
 *   Offset in to table
 * [in] table_type
 *   Table type
 *
 * Returns:
 *
 * 0                                 - Failure
 * Void pointer to page base address - Success
 */
void *tf_em_get_table_page(struct tf_tbl_scope_cb *tbl_scope_cb,
			   enum tf_dir dir,
			   uint32_t offset,
			   enum hcapi_cfa_em_table_type table_type);

/**
 * Validates EM number of entries requested
 *
 * [in] tbl_scope_cb
 *   Pointer to table scope control block to be populated
 *
 * [in] parms
 *   Pointer to input parameters
 *
 * Returns:
 *   0       - Success
 *   -EINVAL - Parameter error
 */
int tf_em_validate_num_entries(struct tf_tbl_scope_cb *tbl_scope_cb,
			       struct tf_alloc_tbl_scope_parms *parms);

/**
 * Size the EM table based on capabilities
 *
 * [in] tbl
 *   EM table to size
 *
 * Returns:
 *   0        - Success
 *   - EINVAL - Parameter error
 *   - ENOMEM - Out of memory
 */
int tf_em_size_table(struct hcapi_cfa_em_table *tbl,
		     uint32_t page_size);

/**
 * Look up table scope control block using tbl_scope_id from
 * tf_session
 *
 * [in] tbl_scope_cb
 *   Pointer to Truflow Handle
 *
 * [in] tbl_scope_id
 *   table scope id
 *
 * Returns:
 *   - Pointer to the tf_tbl_scope_cb, if found.
 *   - (NULL) on failure, not found.
 */
struct tf_tbl_scope_cb *
tf_em_ext_common_tbl_scope_find(struct tf *tfp,
				uint32_t tbl_scope_id);
#endif /* _TF_EM_COMMON_H_ */