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https://github.com/tianocore/edk2
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ea8447eec7
Removed the global variables in ArmFfaSecRxTxMap. Rx/Tx buffer HOB is now created within the Map function rather than in the constructor of ArmFfaSecLib. This allows for the use of the HOB to find the Rx/Tx buffer information. Signed-off-by: Raymond Diaz <raymonddiaz@microsoft.com>
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/** @file
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Arm Ffa library code for PeilessSec
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Copyright (c) 2025, Arm Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Glossary:
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- FF-A - Firmware Framework for Arm A-profile
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@par Reference(s):
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- Arm Firmware Framework for Arm A-Profile [https://developer.arm.com/documentation/den0077/latest]
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**/
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#include <Uefi.h>
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#include <Pi/PiMultiPhase.h>
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#include <Library/ArmLib.h>
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#include <Library/ArmSmcLib.h>
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#include <Library/ArmFfaLib.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/PcdLib.h>
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#include <IndustryStandard/ArmFfaSvc.h>
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#include <Guid/ArmFfaRxTxBufferInfo.h>
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#include "ArmFfaCommon.h"
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#include "ArmFfaRxTxMap.h"
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/**
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ArmFfaLib Constructor.
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@param [in] FileHandle File Handle
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@param [in] PeiServices Pei Service Table
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@retval EFI_SUCCESS Success
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@retval Others Error
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**/
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EFI_STATUS
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EFIAPI
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ArmFfaSecLibConstructor (
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IN VOID
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)
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{
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EFI_STATUS Status;
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UINTN Property1;
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UINTN Property2;
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UINT16 PartId;
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BOOLEAN IsFfaSupported;
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Status = ArmFfaLibCommonInit (&PartId, &IsFfaSupported);
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if (EFI_ERROR (Status)) {
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if (!IsFfaSupported) {
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/*
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* EFI_UNSUPPORTED return from ArmFfaLibCommonInit() means
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* FF-A interface doesn't support.
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* However, It doesn't make failure of loading driver/library instance
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* (i.e) ArmPkg's MmCommunication Dxe/PEI Driver uses as well as SpmMm.
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* So If FF-A is not supported the the MmCommunication Dxe/PEI falls
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* back to SpmMm.
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* For this case, return EFI_SUCCESS.
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*/
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return EFI_SUCCESS;
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}
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return Status;
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}
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Status = ArmFfaLibRxTxMap ();
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if (EFI_ERROR (Status)) {
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if (Status != EFI_UNSUPPORTED) {
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return Status;
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}
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/*
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* When ARM_FID_FFA_PARTITION_INFO_GET_REGS is supported,
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* Rx/Tx buffer might not be required to request service to
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* secure partition.
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* So, consider EFI_UNSUPPORTED for Rx/Tx buffer as SUCCESS.
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*/
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Status = ArmFfaLibGetFeatures (
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ARM_FID_FFA_PARTITION_INFO_GET_REGS,
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0x00,
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&Property1,
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&Property2
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);
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if (!EFI_ERROR (Status)) {
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DEBUG ((DEBUG_INFO, "%a Rx/Tx buffer doesn't support.\n", __func__));
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}
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return Status;
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}
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return EFI_SUCCESS;
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}
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/**
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Return partition or VM ID
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@param[out] PartId The partition or VM ID
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@retval EFI_SUCCESS Partition ID or VM ID returned
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@retval Others Errors
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**/
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EFI_STATUS
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EFIAPI
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ArmFfaLibGetPartId (
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OUT UINT16 *PartId
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)
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{
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return ArmFfaLibPartitionIdGet (PartId);
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}
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/**
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Check FF-A support or not.
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@retval TRUE Supported
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@retval FALSE Not supported
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**/
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BOOLEAN
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EFIAPI
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IsFfaSupported (
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IN VOID
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)
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{
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return ArmFfaLibIsFfaSupported ();
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}
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