OvmfPkg: Apply uncrustify changes

[mirror_edk2.git] / OvmfPkg / Fdt / FdtPciPcdProducerLib / FdtPciPcdProducerLib.c

/** @file\r
  FDT client library for consumers of PCI related dynamic PCDs\r
\r
  Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Uefi.h>\r
\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
\r
#include <Protocol/FdtClient.h>\r
\r
//\r
// We expect the "ranges" property of "pci-host-ecam-generic" to consist of\r
// records like this.\r
//\r
#pragma pack (1)\r
typedef struct {\r
  UINT32    Type;\r
  UINT64    ChildBase;\r
  UINT64    CpuBase;\r
  UINT64    Size;\r
} DTB_PCI_HOST_RANGE_RECORD;\r
#pragma pack ()\r
\r
#define DTB_PCI_HOST_RANGE_RELOCATABLE   BIT31\r
#define DTB_PCI_HOST_RANGE_PREFETCHABLE  BIT30\r
#define DTB_PCI_HOST_RANGE_ALIASED       BIT29\r
#define DTB_PCI_HOST_RANGE_MMIO32        BIT25\r
#define DTB_PCI_HOST_RANGE_MMIO64        (BIT25 | BIT24)\r
#define DTB_PCI_HOST_RANGE_IO            BIT24\r
#define DTB_PCI_HOST_RANGE_TYPEMASK      (BIT31 | BIT30 | BIT29 | BIT25 | BIT24)\r
\r
STATIC\r
RETURN_STATUS\r
GetPciIoTranslation (\r
  IN  FDT_CLIENT_PROTOCOL  *FdtClient,\r
  IN  INT32                Node,\r
  OUT UINT64               *IoTranslation\r
  )\r
{\r
  UINT32      RecordIdx;\r
  CONST VOID  *Prop;\r
  UINT32      Len;\r
  EFI_STATUS  Status;\r
  UINT64      IoBase;\r
\r
  //\r
  // Iterate over "ranges".\r
  //\r
  Status = FdtClient->GetNodeProperty (FdtClient, Node, "ranges", &Prop, &Len);\r
  if (EFI_ERROR (Status) || (Len == 0) ||\r
      (Len % sizeof (DTB_PCI_HOST_RANGE_RECORD) != 0))\r
  {\r
    DEBUG ((DEBUG_ERROR, "%a: 'ranges' not found or invalid\n", __FUNCTION__));\r
    return RETURN_PROTOCOL_ERROR;\r
  }\r
\r
  for (RecordIdx = 0; RecordIdx < Len / sizeof (DTB_PCI_HOST_RANGE_RECORD);\r
       ++RecordIdx)\r
  {\r
    CONST DTB_PCI_HOST_RANGE_RECORD  *Record;\r
    UINT32                           Type;\r
\r
    Record = (CONST DTB_PCI_HOST_RANGE_RECORD *)Prop + RecordIdx;\r
    Type   = SwapBytes32 (Record->Type) & DTB_PCI_HOST_RANGE_TYPEMASK;\r
    if (Type == DTB_PCI_HOST_RANGE_IO) {\r
      IoBase         = SwapBytes64 (Record->ChildBase);\r
      *IoTranslation = SwapBytes64 (Record->CpuBase) - IoBase;\r
\r
      return RETURN_SUCCESS;\r
    }\r
  }\r
\r
  return RETURN_NOT_FOUND;\r
}\r
\r
RETURN_STATUS\r
EFIAPI\r
FdtPciPcdProducerLibConstructor (\r
  VOID\r
  )\r
{\r
  UINT64               PciExpressBaseAddress;\r
  FDT_CLIENT_PROTOCOL  *FdtClient;\r
  CONST UINT64         *Reg;\r
  UINT32               RegSize;\r
  EFI_STATUS           Status;\r
  INT32                Node;\r
  RETURN_STATUS        RetStatus;\r
  UINT64               IoTranslation;\r
  RETURN_STATUS        PcdStatus;\r
\r
  PciExpressBaseAddress = PcdGet64 (PcdPciExpressBaseAddress);\r
  if (PciExpressBaseAddress != MAX_UINT64) {\r
    //\r
    // Assume that the fact that PciExpressBaseAddress has been changed from\r
    // its default value of MAX_UINT64 implies that this code has been\r
    // executed already, in the context of another module. That means we can\r
    // assume that PcdPciIoTranslation has been discovered from the DT node\r
    // as well.\r
    //\r
    return EFI_SUCCESS;\r
  }\r
\r
  Status = gBS->LocateProtocol (\r
                  &gFdtClientProtocolGuid,\r
                  NULL,\r
                  (VOID **)&FdtClient\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  PciExpressBaseAddress = 0;\r
  Status                = FdtClient->FindCompatibleNode (\r
                                       FdtClient,\r
                                       "pci-host-ecam-generic",\r
                                       &Node\r
                                       );\r
\r
  if (!EFI_ERROR (Status)) {\r
    Status = FdtClient->GetNodeProperty (\r
                          FdtClient,\r
                          Node,\r
                          "reg",\r
                          (CONST VOID **)&Reg,\r
                          &RegSize\r
                          );\r
\r
    if (!EFI_ERROR (Status) && (RegSize == 2 * sizeof (UINT64))) {\r
      PciExpressBaseAddress = SwapBytes64 (*Reg);\r
\r
      PcdStatus = PcdSetBoolS (PcdPciDisableBusEnumeration, FALSE);\r
      ASSERT_RETURN_ERROR (PcdStatus);\r
\r
      IoTranslation = 0;\r
      RetStatus     = GetPciIoTranslation (FdtClient, Node, &IoTranslation);\r
      if (!RETURN_ERROR (RetStatus)) {\r
        PcdStatus = PcdSet64S (PcdPciIoTranslation, IoTranslation);\r
        ASSERT_RETURN_ERROR (PcdStatus);\r
      } else {\r
        //\r
        // Support for I/O BARs is not mandatory, and so it does not make sense\r
        // to abort in the general case. So leave it up to the actual driver to\r
        // complain about this if it wants to, and just issue a warning here.\r
        //\r
        DEBUG ((\r
          DEBUG_WARN,\r
          "%a: 'pci-host-ecam-generic' device encountered with no I/O range\n",\r
          __FUNCTION__\r
          ));\r
      }\r
    }\r
  }\r
\r
  PcdStatus = PcdSet64S (PcdPciExpressBaseAddress, PciExpressBaseAddress);\r
  ASSERT_RETURN_ERROR (PcdStatus);\r
\r
  return RETURN_SUCCESS;\r
}\r