system76-edk2/MdeModulePkg/Bus/Pci/PciBusDxe/PciResourceSupport.h

/** @file
  PCI resources support functions declaration for PCI Bus module.

Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _EFI_PCI_RESOURCE_SUPPORT_H_
#define _EFI_PCI_RESOURCE_SUPPORT_H_

typedef enum {
  PciResUsageTypical,
  PciResUsagePadding
} PCI_RESOURCE_USAGE;

#define PCI_RESOURCE_SIGNATURE  SIGNATURE_32 ('p', 'c', 'r', 'c')

typedef struct {
  UINT32                Signature;
  LIST_ENTRY            Link;
  LIST_ENTRY            ChildList;
  PCI_IO_DEVICE         *PciDev;
  UINT64                Alignment;
  UINT64                Offset;
  UINT8                 Bar;
  PCI_BAR_TYPE          ResType;
  UINT64                Length;
  BOOLEAN               Reserved;
  PCI_RESOURCE_USAGE    ResourceUsage;
  BOOLEAN               Virtual;
} PCI_RESOURCE_NODE;

#define RESOURCE_NODE_FROM_LINK(a) \
  CR (a, PCI_RESOURCE_NODE, Link, PCI_RESOURCE_SIGNATURE)

/**
  The function is used to skip VGA range.

  @param Start    Returned start address including VGA range.
  @param Length   The length of VGA range.

**/
VOID
SkipVGAAperture (
  OUT UINT64  *Start,
  IN  UINT64  Length
  );

/**
  This function is used to skip ISA aliasing aperture.

  @param Start    Returned start address including ISA aliasing aperture.
  @param Length   The length of ISA aliasing aperture.

**/
VOID
SkipIsaAliasAperture (
  OUT UINT64  *Start,
  IN  UINT64  Length
  );

/**
  This function inserts a resource node into the resource list.
  The resource list is sorted in descend order.

  @param Bridge  PCI resource node for bridge.
  @param ResNode Resource node want to be inserted.

**/
VOID
InsertResourceNode (
  IN OUT PCI_RESOURCE_NODE  *Bridge,
  IN     PCI_RESOURCE_NODE  *ResNode
  );

/**
  This routine is used to merge two different resource trees in need of
  resource degradation.

  For example, if an upstream PPB doesn't support,
  prefetchable memory decoding, the PCI bus driver will choose to call this function
  to merge prefetchable memory resource list into normal memory list.

  If the TypeMerge is TRUE, Res resource type is changed to the type of destination resource
  type.
  If Dst is NULL or Res is NULL, ASSERT ().

  @param Dst        Point to destination resource tree.
  @param Res        Point to source resource tree.
  @param TypeMerge  If the TypeMerge is TRUE, Res resource type is changed to the type of
                    destination resource type.

**/
VOID
MergeResourceTree (
  IN PCI_RESOURCE_NODE  *Dst,
  IN PCI_RESOURCE_NODE  *Res,
  IN BOOLEAN            TypeMerge
  );

/**
  This function is used to calculate the IO16 aperture
  for a bridge.

  @param Bridge    PCI resource node for bridge.

**/
VOID
CalculateApertureIo16 (
  IN PCI_RESOURCE_NODE  *Bridge
  );

/**
  This function is used to calculate the resource aperture
  for a given bridge device.

  @param Bridge      PCI resource node for given bridge device.

**/
VOID
CalculateResourceAperture (
  IN PCI_RESOURCE_NODE  *Bridge
  );

/**
  Get IO/Memory resource info for given PCI device.

  @param PciDev     Pci device instance.
  @param IoNode     Resource info node for IO .
  @param Mem32Node  Resource info node for 32-bit memory.
  @param PMem32Node Resource info node for 32-bit Prefetchable Memory.
  @param Mem64Node  Resource info node for 64-bit memory.
  @param PMem64Node Resource info node for 64-bit Prefetchable Memory.

**/
VOID
GetResourceFromDevice (
  IN     PCI_IO_DEVICE      *PciDev,
  IN OUT PCI_RESOURCE_NODE  *IoNode,
  IN OUT PCI_RESOURCE_NODE  *Mem32Node,
  IN OUT PCI_RESOURCE_NODE  *PMem32Node,
  IN OUT PCI_RESOURCE_NODE  *Mem64Node,
  IN OUT PCI_RESOURCE_NODE  *PMem64Node
  );

/**
  This function is used to create a resource node.

  @param PciDev       Pci device instance.
  @param Length       Length of Io/Memory resource.
  @param Alignment    Alignment of resource.
  @param Bar          Bar index.
  @param ResType      Type of resource: IO/Memory.
  @param ResUsage     Resource usage.

  @return PCI resource node created for given PCI device.
          NULL means PCI resource node is not created.

**/
PCI_RESOURCE_NODE *
CreateResourceNode (
  IN PCI_IO_DEVICE       *PciDev,
  IN UINT64              Length,
  IN UINT64              Alignment,
  IN UINT8               Bar,
  IN PCI_BAR_TYPE        ResType,
  IN PCI_RESOURCE_USAGE  ResUsage
  );

/**
  This function is used to create a IOV VF resource node.

  @param PciDev       Pci device instance.
  @param Length       Length of Io/Memory resource.
  @param Alignment    Alignment of resource.
  @param Bar          Bar index.
  @param ResType      Type of resource: IO/Memory.
  @param ResUsage     Resource usage.

  @return PCI resource node created for given VF PCI device.
          NULL means PCI resource node is not created.

**/
PCI_RESOURCE_NODE *
CreateVfResourceNode (
  IN PCI_IO_DEVICE       *PciDev,
  IN UINT64              Length,
  IN UINT64              Alignment,
  IN UINT8               Bar,
  IN PCI_BAR_TYPE        ResType,
  IN PCI_RESOURCE_USAGE  ResUsage
  );

/**
  This function is used to extract resource request from
  device node list.

  @param Bridge     Pci device instance.
  @param IoNode     Resource info node for IO.
  @param Mem32Node  Resource info node for 32-bit memory.
  @param PMem32Node Resource info node for 32-bit Prefetchable Memory.
  @param Mem64Node  Resource info node for 64-bit memory.
  @param PMem64Node Resource info node for 64-bit Prefetchable Memory.

**/
VOID
CreateResourceMap (
  IN     PCI_IO_DEVICE      *Bridge,
  IN OUT PCI_RESOURCE_NODE  *IoNode,
  IN OUT PCI_RESOURCE_NODE  *Mem32Node,
  IN OUT PCI_RESOURCE_NODE  *PMem32Node,
  IN OUT PCI_RESOURCE_NODE  *Mem64Node,
  IN OUT PCI_RESOURCE_NODE  *PMem64Node
  );

/**
  This function is used to do the resource padding for a specific platform.

  @param PciDev     Pci device instance.
  @param IoNode     Resource info node for IO.
  @param Mem32Node  Resource info node for 32-bit memory.
  @param PMem32Node Resource info node for 32-bit Prefetchable Memory.
  @param Mem64Node  Resource info node for 64-bit memory.
  @param PMem64Node Resource info node for 64-bit Prefetchable Memory.

**/
VOID
ResourcePaddingPolicy (
  IN PCI_IO_DEVICE      *PciDev,
  IN PCI_RESOURCE_NODE  *IoNode,
  IN PCI_RESOURCE_NODE  *Mem32Node,
  IN PCI_RESOURCE_NODE  *PMem32Node,
  IN PCI_RESOURCE_NODE  *Mem64Node,
  IN PCI_RESOURCE_NODE  *PMem64Node
  );

/**
  This function is used to degrade resource if the upstream bridge
  doesn't support certain resource. Degradation path is
  PMEM64 -> MEM64  -> MEM32
  PMEM64 -> PMEM32 -> MEM32
  IO32   -> IO16.

  @param Bridge     Pci device instance.
  @param Mem32Node  Resource info node for 32-bit memory.
  @param PMem32Node Resource info node for 32-bit Prefetchable Memory.
  @param Mem64Node  Resource info node for 64-bit memory.
  @param PMem64Node Resource info node for 64-bit Prefetchable Memory.

**/
VOID
DegradeResource (
  IN PCI_IO_DEVICE      *Bridge,
  IN PCI_RESOURCE_NODE  *Mem32Node,
  IN PCI_RESOURCE_NODE  *PMem32Node,
  IN PCI_RESOURCE_NODE  *Mem64Node,
  IN PCI_RESOURCE_NODE  *PMem64Node
  );

/**
  Test whether bridge device support decode resource.

  @param Bridge    Bridge device instance.
  @param Decode    Decode type according to resource type.

  @return TRUE     The bridge device support decode resource.
  @return FALSE    The bridge device don't support decode resource.

**/
BOOLEAN
BridgeSupportResourceDecode (
  IN PCI_IO_DEVICE  *Bridge,
  IN UINT32         Decode
  );

/**
  This function is used to program the resource allocated
  for each resource node under specified bridge.

  @param Base     Base address of resource to be programmed.
  @param Bridge   PCI resource node for the bridge device.

  @retval EFI_SUCCESS            Successfully to program all resources
                                 on given PCI bridge device.
  @retval EFI_OUT_OF_RESOURCES   Base is all one.

**/
EFI_STATUS
ProgramResource (
  IN UINT64             Base,
  IN PCI_RESOURCE_NODE  *Bridge
  );

/**
  Program Bar register for PCI device.

  @param Base  Base address for PCI device resource to be programmed.
  @param Node  Point to resource node structure.

**/
VOID
ProgramBar (
  IN UINT64             Base,
  IN PCI_RESOURCE_NODE  *Node
  );

/**
  Program IOV VF Bar register for PCI device.

  @param Base  Base address for PCI device resource to be programmed.
  @param Node  Point to resource node structure.

**/
EFI_STATUS
ProgramVfBar (
  IN UINT64             Base,
  IN PCI_RESOURCE_NODE  *Node
  );

/**
  Program PCI-PCI bridge aperture.

  @param Base  Base address for resource.
  @param Node  Point to resource node structure.

**/
VOID
ProgramPpbApperture (
  IN UINT64             Base,
  IN PCI_RESOURCE_NODE  *Node
  );

/**
  Program parent bridge for Option Rom.

  @param PciDevice      Pci device instance.
  @param OptionRomBase  Base address for Option Rom.
  @param Enable         Enable or disable PCI memory.

**/
VOID
ProgramUpstreamBridgeForRom (
  IN PCI_IO_DEVICE  *PciDevice,
  IN UINT32         OptionRomBase,
  IN BOOLEAN        Enable
  );

/**
  Test whether resource exists for a bridge.

  @param Bridge  Point to resource node for a bridge.

  @retval TRUE   There is resource on the given bridge.
  @retval FALSE  There isn't resource on the given bridge.

**/
BOOLEAN
ResourceRequestExisted (
  IN PCI_RESOURCE_NODE  *Bridge
  );

/**
  Initialize resource pool structure.

  @param ResourcePool Point to resource pool structure. This pool
                      is reset to all zero when returned.
  @param ResourceType Type of resource.

**/
VOID
InitializeResourcePool (
  IN OUT PCI_RESOURCE_NODE  *ResourcePool,
  IN     PCI_BAR_TYPE       ResourceType
  );

/**
  Destroy given resource tree.

  @param Bridge  PCI resource root node of resource tree.

**/
VOID
DestroyResourceTree (
  IN PCI_RESOURCE_NODE  *Bridge
  );

/**
  Insert resource padding for P2C.

  @param PciDev     Pci device instance.
  @param IoNode     Resource info node for IO.
  @param Mem32Node  Resource info node for 32-bit memory.
  @param PMem32Node Resource info node for 32-bit Prefetchable Memory.
  @param Mem64Node  Resource info node for 64-bit memory.
  @param PMem64Node Resource info node for 64-bit Prefetchable Memory.

**/
VOID
ResourcePaddingForCardBusBridge (
  IN PCI_IO_DEVICE      *PciDev,
  IN PCI_RESOURCE_NODE  *IoNode,
  IN PCI_RESOURCE_NODE  *Mem32Node,
  IN PCI_RESOURCE_NODE  *PMem32Node,
  IN PCI_RESOURCE_NODE  *Mem64Node,
  IN PCI_RESOURCE_NODE  *PMem64Node
  );

/**
  Program PCI Card device register for given resource node.

  @param Base    Base address of PCI Card device to be programmed.
  @param Node    Given resource node.

**/
VOID
ProgramP2C (
  IN UINT64             Base,
  IN PCI_RESOURCE_NODE  *Node
  );

/**
  Create padding resource node.

  @param PciDev     Pci device instance.
  @param IoNode     Resource info node for IO.
  @param Mem32Node  Resource info node for 32-bit memory.
  @param PMem32Node Resource info node for 32-bit Prefetchable Memory.
  @param Mem64Node  Resource info node for 64-bit memory.
  @param PMem64Node Resource info node for 64-bit Prefetchable Memory.

**/
VOID
ApplyResourcePadding (
  IN PCI_IO_DEVICE      *PciDev,
  IN PCI_RESOURCE_NODE  *IoNode,
  IN PCI_RESOURCE_NODE  *Mem32Node,
  IN PCI_RESOURCE_NODE  *PMem32Node,
  IN PCI_RESOURCE_NODE  *Mem64Node,
  IN PCI_RESOURCE_NODE  *PMem64Node
  );

/**
  Get padding resource for PCI-PCI bridge.

  @param  PciIoDevice     PCI-PCI bridge device instance.

  @note   Feature flag PcdPciBusHotplugDeviceSupport determines
          whether need to pad resource for them.
**/
VOID
GetResourcePaddingPpb (
  IN  PCI_IO_DEVICE  *PciIoDevice
  );

#endif