GmmCachePolicyCommon.cpp

/*==============================================================================
Copyright(c) 2017 Intel Corporation

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============================================================================*/

#include "Internal/Common/GmmLibInc.h"
#include "External/Common/GmmCachePolicy.h"

/////////////////////////////////////////////////////////////////////////////////////
/// Constructor for the GmmCachePolicyCommon Class, initializes the CachePolicy
/// @param[in]         pCachePolicy
/////////////////////////////////////////////////////////////////////////////////////
GmmLib::GmmCachePolicyCommon::GmmCachePolicyCommon(GMM_CACHE_POLICY_ELEMENT *pCachePolicy, Context *pGmmLibContext)
{
    this->pCachePolicy   = pCachePolicy;
    this->pGmmLibContext = pGmmLibContext;
    NumPATRegisters      = GMM_NUM_PAT_ENTRIES_LEGACY;
    NumMOCSRegisters     = GMM_MAX_NUMBER_MOCS_INDEXES;
}

/////////////////////////////////////////////////////////////////////////////////////
/// Returns the wanted memory type for this usage.
///
/// @param[in]      CachePolicy: cache policy for a usage
///
/// @return         wanted memory type
/////////////////////////////////////////////////////////////////////////////////////
GMM_GFX_MEMORY_TYPE GmmLib::GmmCachePolicyCommon::GetWantedMemoryType(const GMM_CACHE_POLICY_ELEMENT &CachePolicy)
{
    GMM_GFX_MEMORY_TYPE WantedMemoryType = GMM_GFX_UC_WITH_FENCE;
    if(CachePolicy.WT)
    {
        WantedMemoryType = GMM_GFX_WT;
    }
    else if(!(CachePolicy.LLC || CachePolicy.ELLC))
    {
        WantedMemoryType = GMM_GFX_UC_WITH_FENCE;
    }
    else
    {
        WantedMemoryType = GMM_GFX_WB;
    }
    return WantedMemoryType;
}

/////////////////////////////////////////////////////////////////////////////////////
/// Generates memory object based on resource usage
///
/// @param[in]     pResInfo: Resource info for resource , can be null
/// @param[in]     Usage: Current usage for resource
///
/// @return        MEMORY_OBJECT_CONTROL_STATE:    Populated memory object
///
/////////////////////////////////////////////////////////////////////////////////////
MEMORY_OBJECT_CONTROL_STATE GMM_STDCALL GmmLib::GmmCachePolicyCommon::CachePolicyGetOriginalMemoryObject(GMM_RESOURCE_INFO *pResInfo)
{
    MEMORY_OBJECT_CONTROL_STATE MOCS = pGmmLibContext->GetCachePolicyElement(GMM_RESOURCE_USAGE_UNKNOWN).MemoryObjectOverride;
   
    if(pResInfo)
    {
        MOCS = pResInfo->GetMOCS();
    }

    return MOCS;
}

/////////////////////////////////////////////////////////////////////////////////////
///      A simple getter function returning the MOCS (cache policy) for a given
///      use Usage of the named resource pResInfo.
///      Typically used to populate a SURFACE_STATE for a GPU task.
///
/// @param[in]     pResInfo: Resource info for resource, can be NULL.
/// @param[in]     Usage: Current usage for resource.
///
/// @return        MEMORY_OBJECT_CONTROL_STATE: Gen adjusted MOCS structure (cache
///                                             policy) for the given buffer use.
/////////////////////////////////////////////////////////////////////////////////////
MEMORY_OBJECT_CONTROL_STATE GMM_STDCALL GmmLib::GmmCachePolicyCommon::CachePolicyGetMemoryObject(GMM_RESOURCE_INFO *pResInfo, GMM_RESOURCE_USAGE_TYPE Usage)
{
    const GMM_CACHE_POLICY_ELEMENT *CachePolicy = NULL;
    __GMM_ASSERT(pGmmLibContext->GetCachePolicyElement(Usage).Initialized);
    CachePolicy = pGmmLibContext->GetCachePolicyUsage();
    // Prevent wrong Usage for XAdapter resources. UMD does not call GetMemoryObject on shader resources but,
    // when they add it someone could call it without knowing the restriction.
    if(pResInfo &&
       pResInfo->GetResFlags().Info.XAdapter &&
       (Usage != GMM_RESOURCE_USAGE_XADAPTER_SHARED_RESOURCE))
    {
        __GMM_ASSERT(false);
    }

    if(!pResInfo ||
       (CachePolicy[Usage].Override & CachePolicy[pResInfo->GetCachePolicyUsage()].IDCode) ||
       (CachePolicy[Usage].Override == ALWAYS_OVERRIDE))
    {
        return CachePolicy[Usage].MemoryObjectOverride;
    }
    else
    {
        return CachePolicy[Usage].MemoryObjectNoOverride;
    }
}
/////////////////////////////////////////////////////////////////////////////////////
///      A simple getter function returning the PAT (cache policy) for a given
///      use Usage of the named resource pResInfo.
///      Typically used to populate PPGTT/GGTT.
///
/// @param[in]     pResInfo: Resource info for resource, can be NULL.
/// @param[in]     Usage: Current usage for resource.
///
/// @return        PATIndex
/////////////////////////////////////////////////////////////////////////////////////
uint32_t GMM_STDCALL GmmLib::GmmCachePolicyCommon::CachePolicyGetPATIndex(GMM_RESOURCE_INFO *pResInfo, GMM_RESOURCE_USAGE_TYPE Usage, bool *pCompressionEnable, bool IsCpuCacheable)
{
    GMM_UNREFERENCED_PARAMETER(pResInfo);
    GMM_UNREFERENCED_PARAMETER(Usage);
    GMM_UNREFERENCED_PARAMETER(pCompressionEnable);
    GMM_UNREFERENCED_PARAMETER(IsCpuCacheable);

    return GMM_PAT_ERROR;
}

/////////////////////////////////////////////////////////////////////////////////////
/// Generates PTE based on resource usage
///
/// @param[in]     Usage: type of usage
///
/// @return        GMM_PTE_CACHE_CONTROL_BITS: Populated PTE
/////////////////////////////////////////////////////////////////////////////////////
GMM_PTE_CACHE_CONTROL_BITS GMM_STDCALL GmmLib::GmmCachePolicyCommon::CachePolicyGetPteType(GMM_RESOURCE_USAGE_TYPE Usage)
{
    __GMM_ASSERT(pGmmLibContext->GetCachePolicyElement(Usage).Initialized);
    return pGmmLibContext->GetCachePolicyElement(Usage).PTE;
}

/////////////////////////////////////////////////////////////////////////////////////
/// Returns number of PAT entries possible on that platform
///
/// @return        uint32_t
/////////////////////////////////////////////////////////////////////////////////////
uint32_t GMM_STDCALL GmmLib::GmmCachePolicyCommon::CachePolicyGetNumPATRegisters()
{
    return NumPATRegisters;
}

/////////////////////////////////////////////////////////////////////////////////////
/// Returns L1 cache attribute based on resource usage
///
/// @return        uint32_t
/////////////////////////////////////////////////////////////////////////////////////
uint32_t GMM_STDCALL GmmLib::GmmCachePolicyCommon::GetSurfaceStateL1CachePolicy(GMM_RESOURCE_USAGE_TYPE Usage)
{
    __GMM_ASSERT(pCachePolicy[Usage].Initialized);
    return pCachePolicy[Usage].L1CC;
}