/*

 * Copyright (c) 2001-2020 Mellanox Technologies, Ltd. 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

 * 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 SRC_VMA_DEV_RING_ETH_DIRECT_H_

#define SRC_VMA_DEV_RING_ETH_DIRECT_H_

#include <tr1/unordered_map>

#include "dev/ring_simple.h"

typedef std::pair<void*, size_t> pair_void_size_t;

typedef std::pair<uint32_t, int> pair_mr_ref_t;

namespace std { namespace tr1 {

template<>

class hash<pair_void_size_t>

{

public:

	size_t operator()(const pair_void_size_t &key) const

	{

		hash<size_t>_hash;

		return _hash((uint64_t)key.first ^ key.second);

	}

};

}}

typedef std::tr1::unordered_map<pair_void_size_t, pair_mr_ref_t> addr_len_mr_map_t;

class ring_eth_direct : public ring_eth

{

public:

	ring_eth_direct(int if_index,

		    vma_external_mem_attr *ext_ring_attr, ring *parent = NULL);

	virtual		~ring_eth_direct();

	virtual qp_mgr*	create_qp_mgr(const ib_ctx_handler* ib_ctx,

					      uint8_t port_num,

					      struct ibv_comp_channel* p_rx_comp_event_channel);

	// memory handler

	virtual int	reg_mr(void *addr, size_t length, uint32_t &lkey);

	virtual int	dereg_mr(void *addr, size_t length);

	// dummy functions to block memory usage and internal thread

	virtual void	init_tx_buffers(uint32_t count);

	virtual mem_buf_desc_t* mem_buf_tx_get(ring_user_id_t id, bool b_block, int n_num_mem_bufs = 1);

	virtual int	drain_and_proccess(cq_type_t cq_type);

	virtual int	poll_and_process_element_rx(uint64_t* p_cq_poll_sn,

					void* pv_fd_ready_array);

private:

	vma_external_mem_attr	m_ring_attr;

	addr_len_mr_map_t	m_mr_map;

};

#endif /* SRC_VMA_DEV_RING_ETH_DIRECT_H_ */