ArmGicMsiFrameParser.c

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#include <Library/BaseMemoryLib.h>
#include "CmObjectDescUtility.h"
#include "FdtHwInfoParser.h"
#include "Arm/Gic/ArmGicDispatcher.h"
#include "Arm/Gic/ArmGicMsiFrameParser.h"
 
STATIC CONST COMPATIBILITY_STR  MsiFrameCompatibleStr[] = {
  { "arm,gic-v2m-frame" }
};
 
STATIC CONST COMPATIBILITY_INFO  MsiFrameCompatibleInfo = {
  ARRAY_SIZE (MsiFrameCompatibleStr),
  MsiFrameCompatibleStr
};
 
STATIC
EFI_STATUS
EFIAPI
MsiFrameNodeParser (
  IN  CONST VOID                 *Fdt,
  IN  INT32                      MsiFrameNode,
  IN  UINT32                     MsiFrameId,
  OUT CM_ARM_GIC_MSI_FRAME_INFO  *MsiFrameInfo
  )
{
  EFI_STATUS   Status;
  INT32        AddressCells;
  CONST UINT8  *Data;
  INT32        DataSize;
 
  if ((Fdt == NULL) ||
      (MsiFrameInfo == NULL))
  {
    ASSERT (0);
    return EFI_INVALID_PARAMETER;
  }
 
  Status = FdtGetParentAddressInfo (Fdt, MsiFrameNode, &AddressCells, NULL);
  if (EFI_ERROR (Status)) {
    ASSERT (0);
    return Status;
  }
 
  // Don't support more than 64 bits and less than 32 bits addresses.
  if ((AddressCells < 1)  ||
      (AddressCells > 2))
  {
    ASSERT (0);
    return EFI_ABORTED;
  }
 
  Data = fdt_getprop (Fdt, MsiFrameNode, "reg", &DataSize);
  if ((Data == NULL) || (DataSize < (INT32)(AddressCells * sizeof (UINT32)))) {
    // If error or not enough space.
    ASSERT (0);
    return EFI_ABORTED;
  }
 
  if (AddressCells == 2) {
    MsiFrameInfo->PhysicalBaseAddress = fdt64_to_cpu (*(UINT64 *)Data);
  } else {
    MsiFrameInfo->PhysicalBaseAddress = fdt32_to_cpu (*(UINT32 *)Data);
  }
 
  MsiFrameInfo->GicMsiFrameId = MsiFrameId;
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
ArmGicMsiFrameInfoParser (
  IN  CONST FDT_HW_INFO_PARSER_HANDLE  FdtParserHandle,
  IN        INT32                      FdtBranch
  )
{
  EFI_STATUS  Status;
  INT32       MsiFrameNode;
  UINT32      MsiFrameNodeCount;
 
  UINT32                     Index;
  CM_ARM_GIC_MSI_FRAME_INFO  MsiFrameInfo;
  VOID                       *Fdt;
 
  if (FdtParserHandle == NULL) {
    ASSERT (0);
    return EFI_INVALID_PARAMETER;
  }
 
  Fdt = FdtParserHandle->Fdt;
 
  // Count the number of nodes having the "interrupt-controller" property.
  Status = FdtCountPropNodeInBranch (
             Fdt,
             FdtBranch,
             "msi-controller",
             &MsiFrameNodeCount
             );
  if (EFI_ERROR (Status)) {
    ASSERT (0);
    return Status;
  }
 
  if (MsiFrameNodeCount == 0) {
    return EFI_NOT_FOUND;
  }
 
  // Parse each node having the "msi-controller" property.
  MsiFrameNode = FdtBranch;
  for (Index = 0; Index < MsiFrameNodeCount; Index++) {
    ZeroMem (&MsiFrameInfo, sizeof (CM_ARM_GIC_MSI_FRAME_INFO));
 
    Status = FdtGetNextPropNodeInBranch (
               Fdt,
               FdtBranch,
               "msi-controller",
               &MsiFrameNode
               );
    if (EFI_ERROR (Status)) {
      ASSERT (0);
      if (Status == EFI_NOT_FOUND) {
        // Should have found the node.
        Status = EFI_ABORTED;
      }
 
      return Status;
    }
 
    if (!FdtNodeIsCompatible (Fdt, MsiFrameNode, &MsiFrameCompatibleInfo)) {
      ASSERT (0);
      Status = EFI_UNSUPPORTED;
      return Status;
    }
 
    // Parse the Msi information.
    Status = MsiFrameNodeParser (
               Fdt,
               MsiFrameNode,
               Index,
               &MsiFrameInfo
               );
    if (EFI_ERROR (Status)) {
      ASSERT (0);
      return Status;
    }
 
    // Add the CmObj to the Configuration Manager.
    Status = AddSingleCmObj (
               FdtParserHandle,
               CREATE_CM_ARM_OBJECT_ID (EArmObjGicMsiFrameInfo),
               &MsiFrameInfo,
               sizeof (CM_ARM_GIC_MSI_FRAME_INFO),
               NULL
               );
    if (EFI_ERROR (Status)) {
      ASSERT (0);
      return Status;
    }
  } // for
 
  return Status;
}