//
// Do NOT modify or remove this copyright and license
//
// Copyright (c) 2012-2023 Seagate Technology LLC and/or its Affiliates, All Rights Reserved
//
// This software is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
//
// ******************************************************************************************
// 
// \file nvme_helper.h
// \brief Defines the constants structures to help with NVM Express Specification
//        This file acts as a OS agnostic glue layer for different OSes. 

#pragma once
//typedef unsigned int* __uintptr_t;
#include "common_public.h"
#if defined (__cplusplus)
extern "C"
{
#endif

    #define NVME_IDENTIFY_DATA_LEN (4096)
    #define NVME_SMART_HEALTH_LOG_LEN (512)
    #define NVME_DWORD_SIZE (4)
    #define NVME_ALL_NAMESPACES       UINT32_C(0xFFFFFFFF) //This was chosen over 0 for backwards compatibility - TJE

    #define NVME_MAX_FW_SLOTS         (7)

    /* Controller Registers Section 3 & 3.1 NVMe specifications*/
    typedef  struct _nvmeBarCtrlRegisters {
        uint64_t    cap;        /* 00h Controller Capabilities */
        uint32_t    vs;         /* 08h Version */
        uint32_t    intms;      /* 0Ch Interrupt Mask Set */
        uint32_t    intmc;      /* 10h Interrupt Mask Clear */
        uint32_t    cc;         /* 14h Controller Configuration */
        uint32_t    reserved1;  /* 18h Reserved */
        uint32_t    csts;       /* 1Ch Controller Status */
        uint32_t    nssr;       /* 20h NVM Sumsystem Reset (Optional) */
        uint32_t    aqa;        /* 24h Admin Queue Attributes */
        uint64_t    asq;        /* 28h Admin SQ Base Address */
        uint64_t    acq;        /* 30h Admin CQ Base Address */
    } nvmeBarCtrlRegisters;

    typedef enum _eNvmeCmdType {
        NVM_ADMIN_CMD,
        NVM_CMD,
        NVM_UNKNOWN_CMD_SET //NVMe allows for additional command sets to be defined, but only 2 are currently, so make sure we have an "unknown" option
    } eNvmeCmdType; 

    typedef enum _eNvmeIdentifyCNS {
        NVME_IDENTIFY_NS = 0,
        NVME_IDENTIFY_CTRL = 1,
        NVME_IDENTIFY_ALL_ACTIVE_NS = 2,
        NVME_IDENTIFY_NS_ID_DESCRIPTOR_LIST = 3,
    } eNvmeIdentifyCNS;

    typedef enum _eNvmePowerFlags{
        NVME_PS_FLAG_MAX_POWER_SCALE    = 1 << 0,
        NVME_PS_FLAG_NON_OP_STATE   = 1 << 1,
    } eNvmePowerFlags;

#if 0
    typedef enum _eNvmeCtrlCap {
        NVME_ONCS_CTRL_COMPARE          = 1 << 0,
        NVME_ONCS_CTRL_WRITE_UNCORRECTABLE  = 1 << 1,
        NVME_ONCS_CTRL_DSM          = 1 << 2,
        NVME_VWC_CTRL_PRESENT           = 1 << 0,
    } eNvmeCtrlCap;
#endif
    typedef enum _eNvmeNameSpace {
        NVME_NS_LBAF_BEST_RP        = 0,
        NVME_NS_LBAF_BETTER_RP      = 1,
        NVME_NS_LBAF_GOOD_RP        = 2,
        NVME_NS_LBAF_DEGRADED_RP    = 3
    } eNvmeNameSpace ;

    //Figure 78: Get Log Page - Error Information Log Entry (Log Identifier 01h)
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmeErrLogEntry {
        uint64_t            errorCount;
        uint16_t            subQueueID;
        uint16_t            cmdID;
        uint16_t            statusField;
        uint16_t            paramErrLocation;
        uint64_t            lba;
        uint32_t            nsid;
        uint8_t             vendorSpecificInfoAvailable;
        uint8_t             resv1[3]; 
        uint64_t            cmdSpecificInfo;
        uint8_t             resv2[24];
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmeErrLogEntry;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmeErrLogEntry;
    #endif

    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmeSmartLog {
        uint8_t             criticalWarning;
        uint8_t             temperature[2];
        uint8_t             availSpare;
        uint8_t             spareThresh;
        uint8_t             percentUsed;
        uint8_t             enduranceGroupCriticalWarning;
        uint8_t             rsvd6[25];
        uint8_t             dataUnitsRead[16];
        uint8_t             dataUnitsWritten[16];
        uint8_t             hostReads[16];
        uint8_t             hostWrites[16];
        uint8_t             ctrlBusyTime[16];
        uint8_t             powerCycles[16];
        uint8_t             powerOnHours[16];
        uint8_t             unsafeShutdowns[16];
        uint8_t             mediaErrors[16];
        uint8_t             numErrLogEntries[16];
        uint32_t            warningTempTime;
        uint32_t            criticalCompTime;
        uint16_t            tempSensor[8];
        uint32_t            thermalMgmtTemp1TransCount;
        uint32_t            thermalMgmtTemp2TransCount;
        uint32_t            totalTimeThermalMgmtTemp1;
        uint32_t            totalTimeThermalMgmtTemp2;
        uint8_t             rsvd216[280];
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmeSmartLog;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmeSmartLog;
    #endif

    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmeFirmwareSlotInfo {
        uint8_t     afi; //Active Firmware Info Bit 2:0 indicates the firmware slot 
        uint8_t     rsvd1[7];
        uint64_t    FSR[7];
        uint8_t     rsvd2[448];
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmeFirmwareSlotInfo;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmeFirmwareSlotInfo;
    #endif

    enum {
        /* Self-test log Validation bits */
        NVME_SELF_TEST_VALID_NSID   = 1 << 0,
        NVME_SELF_TEST_VALID_FLBA   = 1 << 1,
        NVME_SELF_TEST_VALID_SCT    = 1 << 2,
        NVME_SELF_TEST_VALID_SC     = 1 << 3,
        NVME_SELF_TEST_REPORTS      = 20,
    };

    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmeSelfTestRes {
        uint8_t         deviceSelfTestStatus;
        uint8_t         segmentNum;
        uint8_t         validDiagnosticInfo;
        uint8_t         rsvd;
        uint64_t        powerOnHours;
        uint32_t        nsid;
        uint64_t        failingLba;
        uint8_t         statusCodeType;
        uint8_t         statusCode;
        uint8_t         vendorSpecific[2];
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmeSelfTestRes;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmeSelfTestRes;
    #endif
    
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmeSelfTestLog {
        uint8_t                 crntDevSelftestOprn;
        uint8_t                 crntDevSelftestCompln;
        uint8_t                 rsvd[2];
        nvmeSelfTestRes         result[20];
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmeSelfTestLog;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmeSelfTestLog;
    #endif

    enum {
        NVME_CMD_EFFECTS_CSUPP      = 1 << 0,
        NVME_CMD_EFFECTS_LBCC       = 1 << 1,
        NVME_CMD_EFFECTS_NCC        = 1 << 2,
        NVME_CMD_EFFECTS_NIC        = 1 << 3,
        NVME_CMD_EFFECTS_CCC        = 1 << 4,
        NVME_CMD_EFFECTS_CSE_MASK   = 3 << 16,
    };

    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmeEffectsLog {
        uint32_t acs[256];
        uint32_t iocs[256];
        uint8_t  resv[2048];
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmeEffectsLog;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmeEffectsLog;
    #endif


    typedef enum _eNvmeSmartAttr{
        NVME_SMART_CRIT_SPARE_      = 1 << 0,
        NVME_SMART_CRIT_TEMPERATURE_    = 1 << 1,
        NVME_SMART_CRIT_RELIABILITY_    = 1 << 2,
        NVME_SMART_CRIT_MEDIA_      = 1 << 3,
        NVME_SMART_CRIT_VOLATILE_MEMORY_    = 1 << 4,
    } eNvmeSmartAttr;

    typedef struct _nvmeLBARangeType {
        uint8_t             rangeType; //type
        uint8_t             attributes;
        uint8_t             rsvd2[14];
        uint64_t            slba;
        uint64_t            nlb;
        uint8_t             guid[16];
        uint8_t             rsvd48[16];
    } nvmeLBARangeType;

    typedef enum _eNvmeLBARanges {
        NVME_LBART_TYPE_FS_ = 0x01,
        NVME_LBART_TYPE_RAID_   = 0x02,
        NVME_LBART_TYPE_CACHE_  = 0x03,
        NVME_LBART_TYPE_SWAP_   = 0x04,

        NVME_LBART_ATTRIB_TEMP_ = 1 << 0,
        NVME_LBART_ATTRIB_HIDE_ = 1 << 1,
    } eNvmeLBARanges;


    /**
     * Seagate Specific Log pages - Start
     */

    /**
     * Seagate NVMe specific structures to identify all supported 
     * log pages. 
     */
    #define MAX_LOG_PAGE_LEN    4096

    /**
     * Log Page 0xC5 - Supported Log Pages
     */
    typedef struct _logPageMapEntry
    {
        uint32_t logPageID;
        uint32_t logPageSignature;
        uint32_t logPageVersion;
    } logPageMapEntry;
    
    #define MAX_SUPPORTED_LOG_PAGE_ENTRIES ((MAX_LOG_PAGE_LEN - sizeof(uint32_t)) / sizeof(logPageMapEntry))
    
    typedef struct _logPageMap
    {
       uint32_t numLogPages;
       logPageMapEntry logPageEntry[MAX_SUPPORTED_LOG_PAGE_ENTRIES];
    } logPageMap;

    /**
     * Get Log Page - Supercap DRAM SMART Log Entry (Log Identifier 
     * CFh) 
     */

    typedef struct _u128
    {
        uint64_t LS__u64;
        uint64_t MS__u64;
    } u128;

    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__) 
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmeSuperCapDramSmartAttr {
       uint16_t     superCapCurrentTemperature;        // 00-01
       uint16_t     superCapMaximumTemperature;        // 02-03
       uint8_t      superCapStatus;                    // 04
       uint8_t      reserved5to7[3];                   // 05-07
       u128         dataUnitsReadToDramNamespace;      // 08-23
       u128         dataUnitsWrittenToDramNamespace;   // 24-39
       uint64_t     dramCorrectableErrorCount;         // 40-47
       uint64_t     dramUncorrectableErrorCount;       // 48-55
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmeSuperCapDramSmartAttr;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmeSuperCapDramSmartAttr;
    #endif

    typedef struct _nvmeSuperCapDramSmart {
       nvmeSuperCapDramSmartAttr    attrScSmart;
       uint8_t                      vendorSpecificReserved[456];        // 56-511
    } nvmeSuperCapDramSmart;

    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__) 
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmeTemetryLogHdr {
        uint8_t     logId;
        uint8_t     rsvd1[4];
        uint8_t     ieeeId[3];
        uint16_t    teleDataArea1;
        uint16_t    teleDataArea2;
        uint16_t    teleDataArea3;
        uint8_t     rsvd14[368];
        uint8_t     teleDataAval;
        uint8_t     teleDataGenNum;
        uint8_t     reasonIdentifier[128];
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmeTemetryLogHdr;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmeTemetryLogHdr;
    #endif

/**************************
* PCIE ERROR INFORMATION
**************************/
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__) 
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmePcieErrorLogPage {
       uint32_t   version;
       uint32_t   badDllpErrCnt;
       uint32_t   badTlpErrCnt;
       uint32_t   rcvrErrCnt;
       uint32_t   replayTOErrCnt;
       uint32_t   replayNumRolloverErrCnt;
       uint32_t   fcProtocolErrCnt;
       uint32_t   dllpProtocolErrCnt;
       uint32_t   cmpltnTOErrCnt;
       uint32_t   rcvrQOverflowErrCnt;
       uint32_t   unexpectedCplTlpErrCnt;
       uint32_t   cplTlpURErrCnt;
       uint32_t   cplTlpCAErrCnt;
       uint32_t   reqCAErrCnt;
       uint32_t   reqURErrCnt;
       uint32_t   ecrcErrCnt;
       uint32_t   malformedTlpErrCnt;
       uint32_t   cplTlpPoisonedErrCnt;
       uint32_t   memRdTlpPoisonedErrCnt;
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    } nvmePcieErrorLogPage;
    #pragma pack(pop)
    #else
    }__attribute__((packed,aligned(1))) nvmePcieErrorLogPage;
    #endif
//EOF PCIE ERROR INFORMATION


    /**
     * Seagate Specific Log pages - End
     */


    /* I/O commands */

    typedef enum _eNvmeOPCodes {
        NVME_CMD_FLUSH                  = 0x00,
        NVME_CMD_WRITE                  = 0x01,
        NVME_CMD_READ                   = 0x02,
        NVME_CMD_WRITE_UNCOR            = 0x04,
        NVME_CMD_COMPARE                = 0x05,
        NVME_CMD_WRITE_ZEROS            = 0x08,
        NVME_CMD_DATA_SET_MANAGEMENT    = 0x09,
        NVME_CMD_VERIFY                 = 0x0C,
        NVME_CMD_RESERVATION_REGISTER   = 0x0D,
        NVME_CMD_RESERVATION_REPORT     = 0x0E,
        NVME_CMD_RESERVATION_ACQUIRE    = 0x11,
        NVME_CMD_RESERVATION_RELEASE    = 0x15,
    } eNvmeOPCodes;


    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    #pragma pack(push, 1)
    #endif
    typedef struct _nvmCommand {
        uint8_t             opcode; //CDW0
        uint8_t             flags; //CDW0
        uint16_t            commandId; //CDW0
        uint32_t            nsid; //CDW1
        uint32_t            cdw2; //CDW2
        uint32_t            cdw3; //CDW3
        uint64_t            metadata; //CDW4 & 5
        uint64_t            prp1; //CDW6 & 7
        uint64_t            prp2; //CDW8 & 9
        uint32_t            cdw10;//CDW10
        uint32_t            cdw11;//CDW11
        uint32_t            cdw12;//CDW12
        uint32_t            cdw13;//CDW13
        uint32_t            cdw14;//CDW14
        uint32_t            cdw15;//CDW15
    #if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
        }nvmCommand;
    #pragma pack(pop)
    #else
        }__attribute__((packed, aligned(1))) nvmCommand;
    #endif

#if 0
    typedef struct _nvmeRWCommand {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            nsid;
        uint64_t            rsvd2;
        uint64_t            metadata;
        uint64_t            prp1;
        uint64_t            prp2;
        uint64_t            slba;
        uint16_t            length;
        uint16_t            control;
        uint32_t            dsmgmt;
        uint32_t            reftag;
        uint16_t            apptag;
        uint16_t            appmask;
    } nvmeRWCommand;

    typedef enum _eNvmeRWCmds {
        NVME_RW_LR_         = 1 << 15,
        NVME_RW_FUA_            = 1 << 14,
        NVME_RW_DSM_FREQ_UNSPEC_        = 0,
        NVME_RW_DSM_FREQ_TYPICAL_   = 1,
        NVME_RW_DSM_FREQ_RARE_      = 2,
        NVME_RW_DSM_FREQ_READS_     = 3,
        NVME_RW_DSM_FREQ_WRITES_        = 4,
        NVME_RW_DSM_FREQ_RW_        = 5,
        NVME_RW_DSM_FREQ_ONCE_      = 6,
        NVME_RW_DSM_FREQ_PREFETCH_  = 7,
        NVME_RW_DSM_FREQ_TEMP_      = 8,
        NVME_RW_DSM_LATENCY_NONE_   = 0 << 4,
        NVME_RW_DSM_LATENCY_IDLE_   = 1 << 4,
        NVME_RW_DSM_LATENCY_NORM_   = 2 << 4,
        NVME_RW_DSM_LATENCY_LOW_        = 3 << 4,
        NVME_RW_DSM_SEQ_REQ_        = 1 << 6,
        NVME_RW_DSM_COMPRESSED_     = 1 << 7,
    } eNvmeRWCmds;

    typedef struct _nvmeDsmCmd {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            nsid;
        uint64_t            rsvd2[2];
        uint64_t            prp1;
        uint64_t            prp2;
        uint32_t            nr;
        uint32_t            attributes;
        uint32_t            rsvd12[4];
    } nvmeDsmCmd;

    typedef enum _eNvmeDsmCmds{
        NVME_DSMGMT_IDR_        = 1 << 0,
        NVME_DSMGMT_IDW_        = 1 << 1,
        NVME_DSMGMT_AD_     = 1 << 2,
    } eNvmeDsmCmds;

    typedef struct _nvmeDsmRange {
        uint32_t            cattr;
        uint32_t            nlb;
        uint64_t            slba;
    } nvmeDsmRange;
#endif

    // NVMe Spec - Figure 62: Firmware Commit - Command Dword 10
    typedef enum _nvmeFWCommitAction {
        NVME_CA_REPLACE_NOT_ACTIVITED = 0,
        NVME_CA_REPLACE_ACTIVITE_ON_RST = 1,
        NVME_CA_ACTIVITE_ON_RST = 2,
        NVME_CA_ACTIVITE_IMMEDIATE = 3,
        NVME_CA_DOWNLOAD_REP_BOOT_PART_W_PART_ID    = 6,
        NVME_CA_MARK_BOOT_PART_AS_ACTIVE    = 7
    } nvmeFWCommitAction;

    /* Admin commands */
    typedef enum _eNVMeAdminOpCodes {
        NVME_ADMIN_CMD_DELETE_SQ                    = 0x00,
        NVME_ADMIN_CMD_CREATE_SQ                    = 0x01,
        NVME_ADMIN_CMD_GET_LOG_PAGE                 = 0x02,
        NVME_ADMIN_CMD_DELETE_CQ                    = 0x04,
        NVME_ADMIN_CMD_CREATE_CQ                    = 0x05,
        NVME_ADMIN_CMD_IDENTIFY                     = 0x06,
        NVME_ADMIN_CMD_ABORT_CMD                    = 0x08,
        NVME_ADMIN_CMD_SET_FEATURES                 = 0x09,
        NVME_ADMIN_CMD_GET_FEATURES                 = 0x0A,
        NVME_ADMIN_CMD_ASYNC_EVENT                  = 0x0C,
        NVME_ADMIN_CMD_NAMESPACE_MANAGEMENT         = 0x0D,
        NVME_ADMIN_CMD_ACTIVATE_FW                  = 0x10,
        NVME_ADMIN_CMD_DOWNLOAD_FW                  = 0x11,
        NVME_ADMIN_CMD_DEVICE_SELF_TEST             = 0x14,
        NVME_ADMIN_CMD_NAMESPACE_ATTACHMENT         = 0x15,
        NVME_ADMIN_CMD_KEEP_ALIVE                   = 0x18,
        NVME_ADMIN_CMD_DIRECTIVE_SEND               = 0x19,
        NVME_ADMIN_CMD_DIRECTIVE_RECEIVE            = 0x1A,
        NVME_ADMIN_CMD_VIRTUALIZATION_MANAGEMENT    = 0x1C,
        NVME_ADMIN_CMD_NVME_MI_SEND                 = 0x1D,
        NVME_ADMIN_CMD_NVME_MI_RECEIVE              = 0x1E,
        NVME_ADMIN_CMD_DOORBELL_BUFFER_CONFIG       = 0x7C,
        NVME_ADMIN_CMD_NVME_OVER_FABRICS            = 0x7F,
        NVME_ADMIN_CMD_FORMAT_NVM                   = 0x80,
        NVME_ADMIN_CMD_SECURITY_SEND                = 0x81,
        NVME_ADMIN_CMD_SECURITY_RECV                = 0x82,
        NVME_ADMIN_CMD_SANITIZE                     = 0x84,
    } eNVMeAdminOpCodes;

    //This enum should only be for thing in set/get features commands!!!
    //Anything else should be in a separate enum. No need to clutter this one!
    //TODO: we should name these so we don't need a trailing underscore
    typedef enum _eNvmeFeatures {
        NVME_FEAT_ARBITRATION_  = 0x01,
        NVME_FEAT_POWER_MGMT_   = 0x02,
        NVME_FEAT_LBA_RANGE_    = 0x03,
        NVME_FEAT_TEMP_THRESH_  = 0x04,
        NVME_FEAT_ERR_RECOVERY_ = 0x05,
        NVME_FEAT_VOLATILE_WC_  = 0x06,
        NVME_FEAT_NUM_QUEUES_   = 0x07,
        NVME_FEAT_IRQ_COALESCE_ = 0x08,
        NVME_FEAT_IRQ_CONFIG_   = 0x09,
        NVME_FEAT_WRITE_ATOMIC_ = 0x0A,
        NVME_FEAT_ASYNC_EVENT_  = 0x0B,
        NVME_FEAT_AUTONOMOUS_POWER_STATE_TRANSITION_    = 0x0C,
        NVME_FEAT_HOST_MEMORY_BUFFER_   = 0x0D,
        NVME_FEAT_TIMESTAMP_            = 0x0E,
        NVME_FEAT_KEEP_ALIVE_TIMER_     = 0x0F,
        NVME_FEAT_HOST_CONTROLLED_THERMAL_MANAGEMENT_   = 0x10,
        NVME_FEAT_NON_OPERATIONAL_POWER_STATE_CONFIG_   = 0x11,
        //NVM command set specific
        NVME_FEAT_SOFTWARE_PROGRESS_MARKER_ = 0x80,
        NVME_FEAT_HOST_IDENTIFIER_          = 0x81,
        NVME_FEAT_RESERVATION_NOTIFICATION_MASK_    = 0x82,
        NVME_FEAT_RESERVATION_PERSISTANCE_          = 0x83,
    } eNvmeFeatures;

    //Not sure where these belong...but not in the above enum
    /*NVME_QUEUE_PHYS_CONTIG_   = (1 << 0),
        NVME_CQ_IRQ_ENABLED_    = (1 << 1),
        NVME_SQ_PRIO_URGENT_    = (0 << 1),
        NVME_SQ_PRIO_HIGH_  = (1 << 1),
        NVME_SQ_PRIO_MEDIUM_    = (2 << 1),
        NVME_SQ_PRIO_LOW_   = (3 << 1),*/

    typedef enum _eNvmeLogs
    {
        NVME_LOG_SUPPORTED_PAGES_ID = 0x00,
        NVME_LOG_ERROR_ID = 0x01,
        NVME_LOG_SMART_ID = 0x02,
        NVME_LOG_FW_SLOT_ID = 0x03,
        NVME_LOG_CHANGED_NAMESPACE_LIST = 0x04,
        NVME_LOG_CMD_SPT_EFET_ID = 0x05,
        NVME_LOG_DEV_SELF_TEST_ID = 0x06,
        NVME_LOG_TELEMETRY_HOST_ID = 0x07,
        NVME_LOG_TELEMETRY_CTRL_ID = 0x08,
        NVME_LOG_ENDURANCE_GROUP_INFO_ID = 0x09,
        NVME_LOG_PREDICTABLE_LATENCY_PER_NVM_SET_ID = 0x0A,
        NVME_LOG_PREDICTABLE_LATENCY_EVENT_AGREGATE_ID = 0x0B,
        NVME_LOG_ASYMMETRIC_NAMESPACE_ACCESS_ID = 0x0C,
        NVME_LOG_PERSISTENT_EVENT_LOG_ID = 0x0D,
        NVME_LOG_COMMAND_SET_SPECIFIC_ID = 0x0E,
        NVME_LOG_ENDURANCE_GROUP_EVENT_AGREGATE_ID = 0x0F,
        NVME_LOG_MEDIA_UNIT_STATUS_ID = 0x10,
        NVME_LOG_SUPPORTED_CAPACITY_CONFIGURATION_LIST_ID = 0x11,
        NVME_LOG_FETURE_IDENTIFIERS_SUPPORTED_AND_EFFECTS_ID = 0x12,
        NVME_LOG_MN_COMMANDS_SUPPORTED_AND_EFFECTS_ID = 0x13,
        NVME_LOG_COMMAND_AND_FEATURE_LOCKDOWN_ID = 0x14,
        NVME_LOG_BOOT_PARTITION_ID = 0x15,
        NVME_LOG_ROTATIONAL_MEDIA_INFORMATION_ID = 0x16,
        NVME_LOG_DISCOVERY_ID = 0x70,
        NVME_LOG_RESERVATION_ID = 0x80,
        NVME_LOG_SANITIZE_ID = 0x81,
    }eNvmeLogs;

    typedef enum _eNvmeFeaturesSelectValue {
        NVME_CURRENT_FEAT_SEL,
        NVME_DEFAULT_FEAT_SEL,
        NVME_SAVED_FEAT_SEL,
        NVME_SUPPORTED_FEAT_SEL
    } eNvmeFeaturesSelectValue;

    typedef struct _nvmeGetLogPageCmdOpts {
        uint32_t    nsid;
        uint64_t    metadata; // MPTR
        //uint64_t  addr;   //PRP Entry 1
        uint8_t     *addr;   //PRP Entry 1
        uint32_t    metadataLen;
        uint32_t    dataLen;
        uint8_t     lid; //Log Page identifier, part of Command Dword 10(CDW10)
        //Additional attributes to support Log Page 7 and 8
        uint32_t     lsp;
        uint32_t     rae;
        uint64_t    offset;
    } nvmeGetLogPageCmdOpts;

    /* This Command options structure is common for both Get/Set
       According to nvme spec prp1, prp2, Dword 10 and Dword 11
       are used in the Admin Get/Set features commands
    */
    typedef struct _nvmeFeaturesCmdOpt {
        uint8_t* dataPtr;
        uint32_t dataLength;
        //Following are part of Dword 10 in nvmeSpec 
        uint8_t     sv; // Save Value Used for Set Features command as Bit 31 
        uint8_t     rsvd; // //this part is reserved for both Get/Set Features
        uint8_t     sel; // Select Value SEL Bit 10:08 are used in Get Features. 
        uint8_t     fid; // Feature Identifier used for both Get/Set
        uint32_t    featSetGetValue; //Value returned or to be set as Dword11
        uint32_t    nsid;
    } nvmeFeaturesCmdOpt;

#if 0
    typedef struct _nvmeIdentify {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            nsid;
        uint64_t            rsvd2[2];
        uint64_t            prp1;
        uint64_t            prp2;
        uint32_t            cns;
        uint32_t            rsvd11[5];
    } nvmeIdentify;

    typedef struct _nvmeFeatures {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            nsid;
        uint64_t            rsvd2[2];
        uint64_t            prp1;
        uint64_t            prp2;
        uint32_t            fid;
        uint32_t            dword11;
        uint32_t            rsvd12[4];
    } nvmeFeatures;

    typedef struct _nvmeCreateCQ {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            rsvd1[5];
        uint64_t            prp1;
        uint64_t            rsvd8;
        uint16_t            cqid;
        uint16_t            qsize;
        uint16_t            cqFlags;
        uint16_t            irq_vector;
        uint32_t            rsvd12[4];
    } nvmeCreateCQ;

    typedef struct _nvmeCreateSQ {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            rsvd1[5];
        uint64_t            prp1;
        uint64_t            rsvd8;
        uint16_t            sqid;
        uint16_t            qsize;
        uint16_t            sqFlags;
        uint16_t            cqid;
        uint32_t            rsvd12[4];
    } nvmeCreateSQ;

    typedef struct _nvmeDeleteQueue {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            rsvd1[9];
        uint16_t            qid;
        uint16_t            rsvd10;
        uint32_t            rsvd11[5];
    } nvmeDeleteQueue;

    typedef struct _nvmeAbortCmd {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            rsvd1[9];
        uint16_t            sqid;
        uint16_t            cid;
        uint32_t            rsvd11[5];
    } nvmeAbortCmd;

    typedef struct _nvmeDownloadFirmware {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            rsvd1[5];
        uint64_t            prp1;
        uint64_t            prp2;
        uint32_t            numd;
        uint32_t            offset;
        uint32_t            rsvd12[4];
    } nvmeDownloadFirmware;
#endif

    typedef enum _eProtectionInfoLoc {
        PROTECTION_INFO_AT_END,
        PROTECTION_INFO_AT_BEGIN
    } eProtectionInfoLoc;

    typedef struct _nvmeFormatCmdOpts {
        uint32_t            nsid; //Can be 0xFFFFFFFF to apply to all namespaces
        uint8_t             lbaf; //nible that contains a 0-16 LBA format to apply 
        uint8_t             ms;   //Metadata Setting. 1 if metadata is xfered as part of extended lba. 
        uint8_t             pi;   //Protection Information. 0=none, 1=Type1 PI, 2=Type2, 3=Type3 
        uint8_t             pil;  //Protection Information Location. 1=PI xfered as first 8 bytes of metadata
        uint8_t             ses;  //Secure Erase Settings. 0=none requested, 1=requested, 2=use Crtypto Erase
    } nvmeFormatCmdOpts;

#if 0
    typedef struct _nvmeFormatCMD {
        uint8_t             opcode;
        uint8_t             flags;
        uint16_t            commandId;
        uint32_t            nsid;
        uint64_t            rsvd2[4];
        uint32_t            cdw10;
        uint32_t            rsvd11[5];
    } nvmeFormatCMD;
#endif

    typedef enum _eNvmeStatusCodeType
    {
        NVME_SCT_GENERIC_COMMAND_STATUS = 0,
        NVME_SCT_COMMAND_SPECIFIC_STATUS = 1,
        NVME_SCT_MEDIA_AND_DATA_INTEGRITY_ERRORS = 2,
        NVME_SCT_PATH_RELATED_STATUS    = 3,
        //3-6 are reserved
        NVME_SCT_VENDOR_SPECIFIC_STATUS = 7
    }eNvmeStatusCodeType;

    typedef enum _eNvmeGenericStatusCode {
        NVME_GEN_SC_SUCCESS_                                    = 0x0,
        NVME_GEN_SC_INVALID_OPCODE_                             = 0x1,
        NVME_GEN_SC_INVALID_FIELD_                              = 0x2,
        NVME_GEN_SC_CMDID_CONFLICT_                             = 0x3,
        NVME_GEN_SC_DATA_XFER_ERROR_                            = 0x4,
        NVME_GEN_SC_POWER_LOSS_                                 = 0x5,
        NVME_GEN_SC_INTERNAL_                                   = 0x6,
        NVME_GEN_SC_ABORT_REQ_                                  = 0x7,
        NVME_GEN_SC_ABORT_QUEUE_                                = 0x8,
        NVME_GEN_SC_FUSED_FAIL_                                 = 0x9,
        NVME_GEN_SC_FUSED_MISSING_                              = 0xA,
        NVME_GEN_SC_INVALID_NS_                                 = 0xB,
        NVME_GEN_SC_CMD_SEQ_ERROR_                              = 0xC,
        NVME_GEN_SC_INVALID_SGL_SEGMENT_DESCRIPTOR              = 0x0D,
        NVME_GEN_SC_INVALID_NUMBER_OF_SGL_DESCRIPTORS           = 0x0E,
        NVME_GEN_SC_DATA_SGL_LENGTH_INVALID                     = 0x0F,
        NVME_GEN_SC_METADATA_SGL_LENGTH_INVALID                 = 0x10,
        NVME_GEN_SC_SGL_DESCRIPTOR_TYPE_INVALID                 = 0x11,
        NVME_GEN_SC_INVALID_USE_OF_CONTROLLER_MEMORY_BUFFER     = 0x12,
        NVME_GEN_SC_PRP_OFFSET_INVALID                          = 0x13,
        NVME_GEN_SC_ATOMIC_WRITE_UNIT_EXCEEDED                  = 0x14,
        NVME_GEN_SC_OPERATION_DENIED                            = 0x15,
        NVME_GEN_SC_SGL_OFFSET_INVALID                          = 0x16,
        NVME_GEN_SC_HOST_IDENTIFIER_INCONSISTENT_FORMAT         = 0x18,
        NVME_GEN_SC_KEEP_ALIVE_TIMEOUT_EXPIRED                  = 0x19,
        NVME_GEN_SC_KEEP_ALIVE_TIMEOUT_INVALID                  = 0x1A,
        NVME_GEN_SC_COMMAND_ABORTED_DUE_TO_PREEMPT_AND_ABORT    = 0x1B,
        NVME_GEN_SC_SANITIZE_FAILED                             = 0x1C,
        NVME_GEN_SC_SANITIZE_IN_PROGRESS                        = 0x1D,
        NVME_GEN_SC_SGL_DATA_BLOCK_GRANULARITY_INVALID          = 0x1E,
        NVME_GEN_SC_COMMAND_NOT_SUPPORTED_FOR_QUEUE_IN_CMB      = 0x1F,
        NVME_GEN_SC_NS_IS_WRITE_PROTECTED                       = 0x20,
        NVME_GEN_SC_COMMAND_INTERRUPTED                         = 0x21,
        NVME_GEN_SC_TRANSIENT_TRANSPORT_ERROR                   = 0x22,
        NVME_GEN_SC_COMMAND_PROHIBITED_BY_CMD_AND_FEAT_LOCKDOWN = 0x23,
        NVME_GEN_SC_ADMIN_COMMAND_MEDIA_NOT_READY               = 0x24,
        //80-BF are NVM command set specific
        NVME_GEN_SC_LBA_RANGE_                                  = 0x80,
        NVME_GEN_SC_CAP_EXCEEDED_                               = 0x81,
        NVME_GEN_SC_NS_NOT_READY_                               = 0x82,
        NVME_GEN_SC_RESERVATION_CONFLICT                        = 0x83,
        NVME_GEN_SC_FORMAT_IN_PROGRESS                          = 0x84,
        NVME_GEN_SC_INVALID_VALUE_SIZE                          = 0x85,
        NVME_GEN_SC_INVALID_KEY_SIZE                            = 0x86,
        NVME_GEN_SC_KV_KEY_DOES_NOT_EXIST                       = 0x87,
        NVME_GEN_SC_UNRECOVERED_ERROR                           = 0x88,
        NVME_GEN_SC_KEY_EXISTS                                  = 0x89,
    } eNvmeReturnStatus;

    typedef enum _eNvmeCmdSpecificStatus 
    {
        NVME_CMD_SP_SC_CQ_INVALID_                              = 0x00,
        NVME_CMD_SP_SC_QID_INVALID_                             = 0x01,
        NVME_CMD_SP_SC_QUEUE_SIZE_                              = 0x02,
        NVME_CMD_SP_SC_ABORT_LIMIT_                             = 0x03,
        //NVME_CMD_SP_SC_ABORT_MISSING_ = 0x04,//reserved in NVMe specs
        NVME_CMD_SP_SC_ASYNC_LIMIT_                             = 0x05,
        NVME_CMD_SP_SC_INVALID_FIRMWARE_SLOT_                   = 0x06,
        NVME_CMD_SP_SC_INVALIDFIRMWARE_IMAGE_                   = 0x07,
        NVME_CMD_SP_SC_INVALID_INTERRUPT_VECTOR_                = 0x08,
        NVME_CMD_SP_SC_INVALID_LOG_PAGE_                        = 0x09,
        NVME_CMD_SP_SC_INVALID_FORMAT_                          = 0x0A,
        NVME_CMD_SP_SC_FW_ACT_REQ_CONVENTIONAL_RESET            = 0x0B,
        NVME_CMD_SP_SC_INVALID_QUEUE_DELETION                   = 0x0C,
        NVME_CMD_SP_SC_FEATURE_IDENTIFIER_NOT_SAVABLE           = 0x0D,
        NVME_CMD_SP_SC_FEATURE_NOT_CHANGEABLE                   = 0x0E,
        NVME_CMD_SP_SC_FEATURE_NOT_NAMESPACE_SPECIFC            = 0x0F,
        NVME_CMD_SP_SC_FW_ACT_REQ_NVM_SUBSYS_RESET              = 0x10,
        NVME_CMD_SP_SC_FW_ACT_REQ_RESET                         = 0x11,
        NVME_CMD_SP_SC_FW_ACT_REQ_MAX_TIME_VIOALTION            = 0x12,
        NVME_CMD_SP_SC_FW_ACT_PROHIBITED                        = 0x13,
        NVME_CMD_SP_SC_OVERLAPPING_RANGE                        = 0x14,
        NVME_CMD_SP_SC_NS_INSUFFICIENT_CAP                      = 0x15,
        NVME_CMD_SP_SC_NS_ID_UNAVAILABLE                        = 0x16,
        NVME_CMD_SP_SC_NS_ALREADY_ATTACHED                      = 0x18,
        NVME_CMD_SP_SC_NS_IS_PRIVATE                            = 0x19,
        NVME_CMD_SP_SC_NS_NOT_ATTACHED                          = 0x1A,
        NVME_CMD_SP_SC_THIN_PROVISIONING_NOT_SUPPORTED          = 0x1B,
        NVME_CMD_SP_SC_CONTROLLER_LIST_INVALID                  = 0x1C,
        NVME_CMD_SP_SC_DEVICE_SELF_TEST_IN_PROGRESS             = 0x1D,
        NVME_CMD_SP_SC_BOOT_PARTITION_WRITE_PROHIBITED          = 0x1E,
        NVME_CMD_SP_SC_INVALID_CONTROLLER_IDENTIFIER            = 0x1F,
        NVME_CMD_SP_SC_INVALID_SECONDARY_CONTROLLER_STATE       = 0x20,
        NVME_CMD_SP_SC_INVALID_NUMBER_OF_CONTROLLER_RESOURCES   = 0x21,
        NVME_CMD_SP_SC_INVALID_RESOURCE_IDENTIFIER              = 0x22,
        NVME_CMD_SP_SC_SANITIZE_PROHIBITED_WHILE_PERSISTENT_MEMORY_REGION_IS_ENABLED    = 0x23,
        NVME_CMD_SP_SC_ANA_GROUP_IDENTIFIER_INVALID              = 0x24,
        NVME_CMD_SP_SC_ANA_ATTACH_FAILED                        = 0x25,
        NVME_CMD_SP_SC_INSUFFICIENT_CAPACITY                    = 0x26,
        NVME_CMD_SP_SC_NAMESPACE_ATTACHMENT_LIMIT_EXCEEDED      = 0x27,
        NVME_CMD_SP_SC_PROHIBITION_OF_COMMAND_EXECUTION_NOT_SUPPORTED   = 0x28,
        NVME_CMD_SP_SC_IO_COMMAND_SET_NOT_SUPPORTED             = 0x29,
        NVME_CMD_SP_SC_IO_COMMAND_SET_NOT_ENABLED               = 0x2A,
        NVME_CMD_SP_SC_IO_COMMAND_SET_COMBINATION_REJECTED      = 0x2B,
        NVME_CMD_SP_SC_INVALID_IO_COMMAND_SET                   = 0x2C,
        NVME_CMD_SP_SC_IDENTIFIER_UNAVAILABLE                   = 0x2D,
        //70-7F are Directive Specific
        // 
        //80-BF are NVM command set specific
        //IO Commands
        NVME_CMD_SP_SC_CONFLICTING_ATTRIBUTES_                  = 0x80,
        NVME_CMD_SP_SC_INVALID_PROTECTION_INFORMATION           = 0x81,
        NVME_CMD_SP_SC_ATTEMPTED_WRITE_TO_READ_ONLY_RANGE       = 0x82,
        NVME_CMD_SP_SC_COMMAND_SIZE_LIMIT_EXCEEDED              = 0x83,
        NVME_CMD_SP_SC_ZONED_BOUNDARY_ERROR                     = 0xB8,
        NVME_CMD_SP_SC_ZONE_IS_FULL                             = 0xB9,
        NVME_CMD_SP_SC_ZONE_IS_READ_ONLY                        = 0xBA,
        NVME_CMD_SP_SC_ZONE_IS_OFFLINE                          = 0xBB,
        NVME_CMD_SP_SC_ZONE_INVALID_WRITE                       = 0xBC,
        NVME_CMD_SP_SC_TOO_MANY_ACTIVE_ZONES                    = 0xBD,
        NVME_CMD_SP_SC_TOO_MANY_OPEN_ZONES                      = 0xBE,
        NVME_CMD_SP_SC_INVALID_ZONE_STATE_TRANSITION            = 0xBF,
        //TODO: Fabrics Commands
    }eNvmeCmdSpecificStatus;

    typedef enum _eNvmeMediaDataErrStatus
    {
        NVME_MED_ERR_SC_WRITE_FAULT_                            = 0x80,
        NVME_MED_ERR_SC_UNREC_READ_ERROR_                       = 0x81,
        NVME_MED_ERR_SC_ETE_GUARD_CHECK_                        = 0x82,
        NVME_MED_ERR_SC_ETE_APPTAG_CHECK_                       = 0x83,
        NVME_MED_ERR_SC_ETE_REFTAG_CHECK_                       = 0x84,
        NVME_MED_ERR_SC_COMPARE_FAILED_                         = 0x85,
        NVME_MED_ERR_SC_ACCESS_DENIED_                          = 0x86,
        NVME_MED_ERR_SC_DEALLOCATED_OR_UNWRITTEN_LOGICAL_BLOCK  = 0x87,
        NVME_MED_ERR_SC_END_TO_END_STORAGE_TAG_CHECK_ERROR      = 0x88,
    }eNvmeMediaDataErrStatus;

    typedef enum _eNvmePathRelatedStatus
    {
        NVME_PATH_SC_INTERNAL_PATH_ERROR    = 0x00,
        NVME_PATH_SC_ASYMMETRIC_ACCESS_PERSISTENT_LOSS  = 0x01,
        NVME_PATH_SC_ASYMMETRIC_ACCESS_INACCESSIBLE = 0x02,
        NVME_PATH_SC_ASYMMETRIC_ACCESS_TRANSITION   = 0x03,
        //60-6F are Controller detected Pathing errors
        NVME_PATH_SC_CONTROLLER_PATHING_ERROR   = 0x60,
        //70-7F are Host detected Pathing errors
        NVME_PATH_SC_HOST_PATHING_ERROR = 0x70,
        NVME_PATH_SC_COMMAND_ABORTED_BY_HOST    = 0x71,
        //80-BFh are other pathing errors
        //c0-FFh are vendor specific
    }eNvmePathRelatedStatus;


    //NVME_SC_DNR_          = 0x4000 //Where is this coming from???

#if 0
    typedef struct _nvmeCompletion {
        uint32_t    result;     /* Used by admin commands to return data */
        uint32_t    rsvd;
        uint16_t    sqHead; /* how much of this queue may be reclaimed */
        uint16_t    sqId;       /* submission queue that generated this entry */
        uint16_t    commandId;  /* of the command which completed */
        uint16_t    status;     /* did the command fail, and if so, why? */
    } nvmeCompletion;

    typedef struct _nvmeUserIO {
        uint8_t     opcode;
        uint8_t     flags;
        uint16_t    control;
        uint16_t    nblocks;
        uint16_t    rsvd;
        uint64_t    metadata;
        uint64_t    addr;
        uint64_t    slba;
        uint32_t    dsmgmt;
        uint32_t    reftag;
        uint16_t    apptag;
        uint16_t    appmask;
    } nvmeUserIO;
#endif

#if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
#pragma pack(push, 1)
#endif
    typedef struct _nvmeAdminCommand {
        uint8_t     opcode; //Common Dword 0 (CDW0)
        uint8_t     flags; //Common Dword 0 (CDW0) 
        uint16_t    rsvd1; //Common Dword 0 (CDW0)
        uint32_t    nsid;  //Namespace Identifier (NSID)
        uint32_t    cdw2; // Reserved?
        uint32_t    cdw3; // Reserved?
        uint64_t    metadata; // MPTR
        uint64_t    addr;   //PRP Entry 1
        uint32_t    metadataLen;
        uint32_t    empty; //Was set to datalen, but that is redundant where this is otherwise used. Need this here to keep this the correct size for use elsewhere.
        uint32_t    cdw10; //Command Dword 10(CDW10)
        uint32_t    cdw11; //Command Dword 10(CDW10)
        uint32_t    cdw12; //Command Dword 10(CDW10)
        uint32_t    cdw13; //Command Dword 10(CDW10)
        uint32_t    cdw14; //Command Dword 10(CDW10)
        uint32_t    cdw15; //Command Dword 10(CDW10)
#if !defined (__GNUC__) || defined (__MINGW32__) || defined (__MINGW64__)
    }nvmeAdminCommand;
#pragma pack(pop)
#else
    }__attribute__((packed, aligned(1))) nvmeAdminCommand;
#endif

    typedef struct _nvmCommandDWORDS {
        uint32_t            cdw0; //CDW0
        uint32_t            cdw1; //CDW1
        uint32_t            cdw2; //CDW2
        uint32_t            cdw3; //CDW3
        uint32_t            cdw4; //CDW4
        uint32_t            cdw5; //CDW5
        uint32_t            cdw6; //CDW6
        uint32_t            cdw7; //CDW7
        uint32_t            cdw8; //CDW8
        uint32_t            cdw9; //CDW9
        uint32_t            cdw10;//CDW10
        uint32_t            cdw11;//CDW11
        uint32_t            cdw12;//CDW12
        uint32_t            cdw13;//CDW13
        uint32_t            cdw14;//CDW14
        uint32_t            cdw15;//CDW15
    } nvmCommandDWORDS;

    typedef struct _nvmeCommands {
        union {
            nvmeAdminCommand adminCmd; //Use for commands part of the Admin command set
            nvmCommand nvmCmd; //Use for commands part of the NVM command set
            nvmCommandDWORDS dwords; //So that we can see the whole thing as separate DWORDs...mostly used for unknown case to print out. This is the 64 bytes of command structure.
        };
    } nvmeCommands;

    typedef struct _completionQueueEntry
    {
        bool dw0Valid;//OS doing passthrough may or may not get this field back...so this is set to indicate it was retrieved by the OS
        bool dw1Valid;
        bool dw2Valid;
        bool dw3Valid;//AKA status and CID. Don't expect a valid CID though! Not every OS will give us that.
        union {
            uint32_t commandSpecific;//AKA result
            uint32_t dw0;
        };
        union {
            uint32_t dw1Reserved;
            uint32_t dw1;
        };
        union {
            uint32_t sqIDandHeadPtr;//This likely won't contain anything valid even if the OS passthrough gave us this DWORD
            uint32_t dw2;
        };
        union {
            uint32_t statusAndCID;
            uint32_t dw3;
        };
    }completionQueueEntry;

    // \struct typedef struct _nvmeCmdCtx
    typedef struct _nvmeCmdCtx
    {
        tDevice                 *device;
        eNvmeCmdType            commandType;//admin vs nvm command (needed for some OSs to send to the correct queue)
        eDataTransferDirection  commandDirection;//this should match the NVMe definition in opcode bits 1:0. 00 - no data, 01 - host to controller (out), 10 - controller to host (in), 11 - bidirectional
        nvmeCommands            cmd; //cmd definition. This will be accessed depending on what is set to comandType field
        uint8_t                 *ptrData;//buffer to hold data being sent or received
        uint32_t                dataSize;//size of data being sent or received in BYTES
        uint32_t                timeout; //in seconds 
        completionQueueEntry    commandCompletionData;
        bool                    fwdlFirstSegment; //fwdl unique flag to help low-level OS code
        bool                    fwdlLastSegment; //fwdl unique flag to help low-level OS code
        uint32_t                delay_io;
    } nvmeCmdCtx;

    //Smart attribute IDs

    typedef enum
    {
        VS_ATTR_ID_SOFT_READ_ERROR_RATE = 1,
        VS_ATTR_ID_REALLOCATED_SECTOR_COUNT  = 5,
        VS_ATTR_ID_POWER_ON_HOURS = 9,
        VS_ATTR_ID_POWER_FAIL_EVENT_COUNT = 11,
        VS_ATTR_ID_DEVICE_POWER_CYCLE_COUNT = 12,
        VS_ATTR_ID_RAW_READ_ERROR_RATE = 13,
        VS_ATTR_ID_GROWN_BAD_BLOCK_COUNT = 40,
        VS_ATTR_ID_END_2_END_CORRECTION_COUNT = 41,
        VS_ATTR_ID_MIN_MAX_WEAR_RANGE_COUNT = 42,
        VS_ATTR_ID_REFRESH_COUNT = 43,
        VS_ATTR_ID_BAD_BLOCK_COUNT_USER = 44,
        VS_ATTR_ID_BAD_BLOCK_COUNT_SYSTEM = 45,
        VS_ATTR_ID_THERMAL_THROTTLING_STATUS = 46,
        VS_ATTR_ID_ALL_PCIE_CORRECTABLE_ERROR_COUNT = 47,
        VS_ATTR_ID_ALL_PCIE_UNCORRECTABLE_ERROR_COUNT = 48,
        VS_ATTR_ID_INCOMPLETE_SHUTDOWN_COUNT = 49,
        VS_ATTR_ID_GB_ERASED_LSB = 100,
        VS_ATTR_ID_GB_ERASED_MSB = 101,
        VS_ATTR_ID_LIFETIME_ENTERING_PS4_COUNT = 102,
        VS_ATTR_ID_LIFETIME_ENTERING_PS3_COUNT = 103,
        VS_ATTR_ID_LIFETIME_DEVSLEEP_EXIT_COUNT = 104,
        VS_ATTR_ID_RETIRED_BLOCK_COUNT = 170,
        VS_ATTR_ID_PROGRAM_FAILURE_COUNT = 171,
        VS_ATTR_ID_ERASE_FAIL_COUNT = 172,
        VS_ATTR_ID_AVG_ERASE_COUNT = 173,
        VS_ATTR_ID_UNEXPECTED_POWER_LOSS_COUNT = 174,
        VS_ATTR_ID_WEAR_RANGE_DELTA = 177,
        VS_ATTR_ID_SATA_INTERFACE_DOWNSHIFT_COUNT = 183,
        VS_ATTR_ID_END_TO_END_CRC_ERROR_COUNT = 184,
        VS_ATTR_ID_UNCORRECTABLE_ECC_ERRORS = 188,
        VS_ATTR_ID_MAX_LIFE_TEMPERATURE = 194,
        VS_ATTR_ID_RAISE_ECC_CORRECTABLE_ERROR_COUNT = 195,
        VS_ATTR_ID_UNCORRECTABLE_RAISE_ERRORS = 198,
        VS_ATTR_ID_DRIVE_LIFE_PROTECTION_STATUS = 230,
        VS_ATTR_ID_REMAINING_SSD_LIFE  = 231,
        VS_ATTR_ID_LIFETIME_WRITES_TO_FLASH_LSB = 233,
        VS_ATTR_ID_LIFETIME_WRITES_TO_FLASH_MSB = 234,
        VS_ATTR_ID_LIFETIME_WRITES_FROM_HOST_LSB = 241,
        VS_ATTR_ID_LIFETIME_WRITES_FROM_HOST_MSB = 242,
        VS_ATTR_ID_LIFETIME_READS_TO_HOST_LSB = 243,
        VS_ATTR_ID_LIFETIME_READS_TO_HOST_MSB = 244,
        VS_ATTR_ID_FREE_SPACE = 245,
        VS_ATTR_ID_TRIM_COUNT_LSB = 250,
        VS_ATTR_ID_TRIM_COUNT_MSB = 251,
        VS_ATTR_ID_OP_PERCENTAGE = 252,
        VS_ATTR_ID_MAX_SOC_LIFE_TEMPERATURE = 253,
    } smart_attributes_ids;
    


/***************************
* Extended-SMART Information
***************************/
#pragma pack(push, 1)
#define NUMBER_EXTENDED_SMART_ATTRIBUTES      42

typedef enum _EXTENDED_SMART_VERSION_
{
    EXTENDED_SMART_VERSION_NONE,    // 0
    EXTENDED_SMART_VERSION_GEN,     // 1
    EXTENDED_SMART_VERSION_FB,      // 2
} EXTENDED_SMART_VERSION;

typedef struct _SmartVendorSpecific
{
   uint8_t   AttributeNumber;
   uint16_t  SmartStatus;
   uint8_t   NominalValue;
   uint8_t   LifetimeWorstValue;
   uint32_t  Raw0_3;
   uint8_t   RawHigh[3];
} SmartVendorSpecific;


typedef struct _EXTENDED_SMART_INFO_T
{
   uint16_t Version;
   SmartVendorSpecific vendorData[NUMBER_EXTENDED_SMART_ATTRIBUTES];
   uint8_t   vendor_specific_reserved[6];
}  EXTENDED_SMART_INFO_T;

typedef struct fb_smart_attribute_data
{
   uint8_t   AttributeNumber;         // 00
   uint8_t   Rsvd[3];                 // 01 -03
   uint32_t  LSDword;                 // 04-07
   uint32_t   MSDword;                 // 08 - 11
} fb_smart_attribute_data;


typedef struct _U128
{
    uint64_t  LSU64;
    uint64_t  MSU64;
} U128;

typedef struct _fb_log_page_CF_Attr
{
   uint16_t       SuperCapCurrentTemperature;        // 00-01
   uint16_t       SuperCapMaximumTemperature;        // 02-03
   uint8_t        SuperCapStatus;                    // 04
   uint8_t        Reserved5to7[3];                   // 05-07
   U128           DataUnitsReadToDramNamespace;      // 08-23
   U128           DataUnitsWrittenToDramNamespace;   // 24-39
   uint64_t       DramCorrectableErrorCount;         // 40-47
   uint64_t       DramUncorrectableErrorCount;       // 48-55
}fb_log_page_CF_Attr;

typedef struct _fb_log_page_CF
{
   fb_log_page_CF_Attr      AttrCF;
   uint8_t                  Vendor_Specific_Reserved[ 456 ];     // 56-511
}fb_log_page_CF;

#pragma pack(pop)

/* EOF Extended-SMART Information*/

#if defined (__cplusplus)
}
#endif

