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data_buffer.h
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//////////////////////////////////////////////////////////////////////////////////
// data_buffer.h for Cosmos+ OpenSSD
// Copyright (c) 2017 Hanyang University ENC Lab.
// Contributed by Yong Ho Song <[email protected]>
// Jaewook Kwak <[email protected]>
//
// This file is part of Cosmos+ OpenSSD.
//
// Cosmos+ OpenSSD is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// Cosmos+ OpenSSD is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Cosmos+ OpenSSD; see the file COPYING.
// If not, see <http://www.gnu.org/licenses/>.
//////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////
// Company: ENC Lab. <http://enc.hanyang.ac.kr>
// Engineer: Jaewook Kwak <[email protected]>
//
// Project Name: Cosmos+ OpenSSD
// Design Name: Cosmos+ Firmware
// Module Name: Data Buffer Manager
// File Name: data_buffer.h
//
// Version: v1.0.0
//
// Description:
// - define parameters, data structure and functions of data buffer manager
//////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////
// Revision History:
//
// * v1.0.0
// - First draft
//////////////////////////////////////////////////////////////////////////////////
#ifndef DATA_BUFFER_H_
#define DATA_BUFFER_H_
#include "ftl_config.h"
#define AVAILABLE_DATA_BUFFER_ENTRY_COUNT (16 * USER_DIES)
#define AVAILABLE_TEMPORARY_DATA_BUFFER_ENTRY_COUNT (USER_DIES)
#define DATA_BUF_NONE 0xffff
#define DATA_BUF_FAIL 0xffff
#define DATA_BUF_DIRTY 1
#define DATA_BUF_CLEAN 0
#define FindDataBufHashTableEntry(logicalSliceAddr) ((logicalSliceAddr) % AVAILABLE_DATA_BUFFER_ENTRY_COUNT)
typedef struct _DATA_BUF_ENTRY {
unsigned int logicalSliceAddr;
unsigned int prevEntry : 16;//for lru
unsigned int nextEntry : 16;
unsigned int blockingReqTail : 16;
unsigned int hashPrevEntry : 16;
unsigned int hashNextEntry : 16;
unsigned int dirty : 1;
unsigned int reserved0 : 15;
} DATA_BUF_ENTRY, *P_DATA_BUF_ENTRY;
typedef struct _DATA_BUF_MAP{
DATA_BUF_ENTRY dataBuf[AVAILABLE_DATA_BUFFER_ENTRY_COUNT];
} DATA_BUF_MAP, *P_DATA_BUF_MAP;
typedef struct _DATA_BUF_LRU_LIST {
unsigned int headEntry : 16;
unsigned int tailEntry : 16;
} DATA_BUF_LRU_LIST, *P_DATA_BUF_LRU_LIST;
typedef struct _DATA_BUF_HASH_ENTRY{
unsigned int headEntry : 16;
unsigned int tailEntry : 16;
} DATA_BUF_HASH_ENTRY, *P_DATA_BUF_HASH_ENTRY;
typedef struct _DATA_BUF_HASH_TABLE{
DATA_BUF_HASH_ENTRY dataBufHash[AVAILABLE_DATA_BUFFER_ENTRY_COUNT];
} DATA_BUF_HASH_TABLE, *P_DATA_BUF_HASH_TABLE;
typedef struct _TEMPORARY_DATA_BUF_ENTRY {
unsigned int blockingReqTail : 16;
unsigned int reserved0 : 16;
} TEMPORARY_DATA_BUF_ENTRY, *P_TEMPORARY_DATA_BUF_ENTRY;
typedef struct _TEMPORARY_DATA_BUF_MAP{
TEMPORARY_DATA_BUF_ENTRY tempDataBuf[AVAILABLE_TEMPORARY_DATA_BUFFER_ENTRY_COUNT];
} TEMPORARY_DATA_BUF_MAP, *P_TEMPORARY_DATA_BUF_MAP;
void InitDataBuf();
unsigned int CheckDataBufHit(unsigned int reqSlotTag);
unsigned int AllocateDataBuf();
void UpdateDataBufEntryInfoBlockingReq(unsigned int bufEntry, unsigned int reqSlotTag);
unsigned int AllocateTempDataBuf(unsigned int dieNo);
void UpdateTempDataBufEntryInfoBlockingReq(unsigned int bufEntry, unsigned int reqSlotTag);
void PutToDataBufHashList(unsigned int bufEntry);
void SelectiveGetFromDataBufHashList(unsigned int bufEntry);
extern P_DATA_BUF_MAP dataBufMapPtr;
extern DATA_BUF_LRU_LIST dataBufLruList;
extern P_DATA_BUF_HASH_TABLE dataBufHashTable;
extern P_TEMPORARY_DATA_BUF_MAP tempDataBufMapPtr;
#endif /* DATA_BUFFER_H_ */