/** @file

Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include <PiDxe.h>
#include "PciPlatform.h"
#include <Guid/SetupVariable.h>

#ifdef EFI_PCI_IOV_SUPPORT

/**

    The GetSystemLowestPageSize() function retrieves the system lowest page size.
    
    @param This                 - Pointer to the EFI_PCI_IOV_PLATFORM_PROTOCOL instance.
    @param SystemLowestPageSize - The system lowest page size. (This system supports a
                                  page size of 2^(n+12) if bit n is set.)
    
    @retval EFI_SUCCESS           - The function completed successfully.
    @retval EFI_INVALID_PARAMETER - SystemLowestPageSize is NULL.
    
**/
EFI_STATUS
EFIAPI
GetSystemLowestPageSize (
  IN  EFI_PCI_IOV_PLATFORM_PROTOCOL           *This,
  OUT UINT32                                  *SystemLowestPageSize
)
{
  UINT8                                 SystemPageSize;  

  CopyMem (&SystemPageSize, (UINT8 *)PcdGetPtr(PcdSetupData) + OFFSET_OF(SYSTEM_CONFIGURATION, SystemPageSize), sizeof(UINT8));
  
  if (SystemLowestPageSize != NULL) {
    //
    // Page size is 4K
    //
    //*SystemLowestPageSize = 1;
    *SystemLowestPageSize = SystemPageSize;
  }
  return EFI_SUCCESS;
}

/**

    The GetIovPlatformPolicy() function retrieves the platform policy regarding PCI IOV.
    
    @param This         - Pointer to the EFI_PCI_IOV_PLATFORM_PROTOCOL instance.
    @param PciIovPolicy - The platform policy for PCI IOV configuration.
    
    @retval EFI_SUCCESS           - The function completed successfully.
    @retval EFI_INVALID_PARAMETER - PciPolicy is NULL.
    
**/
EFI_STATUS
EFIAPI 
GetIovPlatformPolicy (
  IN  EFI_PCI_IOV_PLATFORM_PROTOCOL           *This,
  OUT EFI_PCI_IOV_PLATFORM_POLICY             *PciIovPolicy
)
{
  UINT8                                 PolicyEnable;
  UINT8                                 ARIEnable;
  UINT8                                 SRIOVEnable;
  UINT8                                 MRIOVEnable;

  PolicyEnable = 0;
  
  CopyMem (&ARIEnable, (UINT8 *)PcdGetPtr(PcdSetupData) + OFFSET_OF(SYSTEM_CONFIGURATION, ARIEnable), sizeof(UINT8));
  CopyMem (&SRIOVEnable, (UINT8 *)PcdGetPtr(PcdSetupData) + OFFSET_OF(SYSTEM_CONFIGURATION, SRIOVEnable), sizeof(UINT8));
  CopyMem (&MRIOVEnable, (UINT8 *)PcdGetPtr(PcdSetupData) + OFFSET_OF(SYSTEM_CONFIGURATION, MRIOVEnable), sizeof(UINT8));

  if (ARIEnable == TRUE) {
    PolicyEnable = PolicyEnable | EFI_PCI_IOV_POLICY_ARI;
  }

  if (SRIOVEnable == TRUE) {
    PolicyEnable = PolicyEnable | EFI_PCI_IOV_POLICY_SRIOV;
  }

  if (MRIOVEnable == TRUE) {
    PolicyEnable = PolicyEnable | EFI_PCI_IOV_POLICY_MRIOV;
  }
  
  if (PciIovPolicy != NULL) {
    //*PciIovPolicy = EFI_PCI_IOV_POLICY_ARI | EFI_PCI_IOV_POLICY_SRIOV;
    *PciIovPolicy = PolicyEnable;
  }
  return EFI_SUCCESS;
}

#endif