[RFC 6/6] MdeModulePkg: Modify PciHostBridgeDxe to use new BmDmaLib library.

[Leo Duran <leo.duran@amd.com>]

Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Leo Duran  <leo.duran@amd.com>
---
 .../Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf  |   1 +
 .../Bus/Pci/PciHostBridgeDxe/PciRootBridge.h       |  13 +-
 .../Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c     | 272 +++++----------------
 MdeModulePkg/MdeModulePkg.dsc                      |   1 +
 4 files changed, 67 insertions(+), 220 deletions(-)

diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
index d8b0439..35bb5c4 100644
--- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
+++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
@@ -42,6 +42,7 @@ [LibraryClasses]
   BaseLib
   PciSegmentLib
   PciHostBridgeLib
+  BmDmaLib
 
 [Protocols]
   gEfiMetronomeArchProtocolGuid                   ## CONSUMES
diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h
index 13185b4..c125fcd 100644
--- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h
+++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h
@@ -34,6 +34,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/BaseLib.h>
 #include <Library/PciSegmentLib.h>
+#include <Library/BmDmaLib.h>
 #include "PciHostResource.h"
 
 
@@ -43,17 +44,6 @@ typedef enum {
   PciOperation
 } OPERATION_TYPE;
 
-#define MAP_INFO_SIGNATURE  SIGNATURE_32 ('_', 'm', 'a', 'p')
-typedef struct {
-  UINT32                                    Signature;
-  LIST_ENTRY                                Link;
-  EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation;
-  UINTN                                     NumberOfBytes;
-  UINTN                                     NumberOfPages;
-  EFI_PHYSICAL_ADDRESS                      HostAddress;
-  EFI_PHYSICAL_ADDRESS                      MappedHostAddress;
-} MAP_INFO;
-#define MAP_INFO_FROM_LINK(a) CR (a, MAP_INFO, Link, MAP_INFO_SIGNATURE)
 
 #define PCI_ROOT_BRIDGE_SIGNATURE SIGNATURE_32 ('_', 'p', 'r', 'b')
 
@@ -79,7 +69,6 @@ typedef struct {
   EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL   RootBridgeIo;
 
   BOOLEAN                           ResourceSubmitted;
-  LIST_ENTRY                        Maps;
 } PCI_ROOT_BRIDGE_INSTANCE;
 
 #define ROOT_BRIDGE_FROM_THIS(a) CR (a, PCI_ROOT_BRIDGE_INSTANCE, RootBridgeIo, PCI_ROOT_BRIDGE_SIGNATURE)
diff --git a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c
index 8af131b..8a74bf6 100644
--- a/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c
+++ b/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c
@@ -17,7 +17,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include "PciRootBridge.h"
 #include "PciHostResource.h"
 
-#define NO_MAPPING  (VOID *) (UINTN) -1
 
 //
 // Lookup table for increment values based on transfer widths
@@ -55,6 +54,39 @@ UINT8 mOutStride[] = {
   0  // EfiPciWidthFillUint64
 };
 
+
+BM_DMA_OPERATION
+ConvertDmaOperation (
+  IN     EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION  RbOperation
+  )
+{
+  BM_DMA_OPERATION BmOperation;
+
+  switch (RbOperation) {
+  case EfiPciOperationBusMasterRead:
+  case EfiPciOperationBusMasterRead64:
+    BmOperation = DmaOperationBusMasterRead;
+    break;
+
+  case EfiPciOperationBusMasterWrite:
+  case EfiPciOperationBusMasterWrite64:
+    BmOperation = DmaOperationBusMasterWrite;
+    break;
+
+  case EfiPciOperationBusMasterCommonBuffer:
+  case EfiPciOperationBusMasterCommonBuffer64:
+    BmOperation = DmaOperationBusMasterCommonBuffer;
+    break;
+
+  default:
+    BmOperation = DmaOperationBusMasterMaximum;
+    break;
+  }
+
+  return BmOperation;
+}
+
+
 /**
   Construct the Pci Root Bridge instance.
 
@@ -168,7 +200,6 @@ CreateRootBridge (
     TypeMax * sizeof (EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR) + sizeof (EFI_ACPI_END_TAG_DESCRIPTOR)
     );
   ASSERT (RootBridge->ConfigBuffer != NULL);
-  InitializeListHead (&RootBridge->Maps);
 
   CopyMem (&RootBridge->Bus, &Bridge->Bus, sizeof (PCI_ROOT_BRIDGE_APERTURE));
   CopyMem (&RootBridge->Io, &Bridge->Io, sizeof (PCI_ROOT_BRIDGE_APERTURE));
@@ -1053,118 +1084,27 @@ RootBridgeIoMap (
   OUT    VOID                                       **Mapping
   )
 {
-  EFI_STATUS                                        Status;
-  PCI_ROOT_BRIDGE_INSTANCE                          *RootBridge;
-  EFI_PHYSICAL_ADDRESS                              PhysicalAddress;
-  MAP_INFO                                          *MapInfo;
-
-  if (HostAddress == NULL || NumberOfBytes == NULL || DeviceAddress == NULL ||
-      Mapping == NULL) {
-    return EFI_INVALID_PARAMETER;
-  }
-
-  //
-  // Make sure that Operation is valid
-  //
-  if ((UINT32) Operation >= EfiPciOperationMaximum) {
-    return EFI_INVALID_PARAMETER;
-  }
+  PCI_ROOT_BRIDGE_INSTANCE *RootBridge;
+  BOOLEAN                  DmaAbove4GB;
+  BM_DMA_OPERATION         BmOperation;
 
   RootBridge = ROOT_BRIDGE_FROM_THIS (This);
-
-  PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
-  if ((!RootBridge->DmaAbove4G ||
-       (Operation != EfiPciOperationBusMasterRead64 &&
-        Operation != EfiPciOperationBusMasterWrite64 &&
-        Operation != EfiPciOperationBusMasterCommonBuffer64)) &&
-      ((PhysicalAddress + *NumberOfBytes) > SIZE_4GB)) {
-
-    //
-    // If the root bridge or the device cannot handle performing DMA above
-    // 4GB but any part of the DMA transfer being mapped is above 4GB, then
-    // map the DMA transfer to a buffer below 4GB.
-    //
-
-    if (Operation == EfiPciOperationBusMasterCommonBuffer ||
-        Operation == EfiPciOperationBusMasterCommonBuffer64) {
-      //
-      // Common Buffer operations can not be remapped.  If the common buffer
-      // if above 4GB, then it is not possible to generate a mapping, so return
-      // an error.
-      //
-      return EFI_UNSUPPORTED;
-    }
-
-    //
-    // Allocate a MAP_INFO structure to remember the mapping when Unmap() is
-    // called later.
-    //
-    MapInfo = AllocatePool (sizeof (MAP_INFO));
-    if (MapInfo == NULL) {
-      *NumberOfBytes = 0;
-      return EFI_OUT_OF_RESOURCES;
-    }
-
-    //
-    // Initialize the MAP_INFO structure
-    //
-    MapInfo->Signature         = MAP_INFO_SIGNATURE;
-    MapInfo->Operation         = Operation;
-    MapInfo->NumberOfBytes     = *NumberOfBytes;
-    MapInfo->NumberOfPages     = EFI_SIZE_TO_PAGES (MapInfo->NumberOfBytes);
-    MapInfo->HostAddress       = PhysicalAddress;
-    MapInfo->MappedHostAddress = SIZE_4GB - 1;
-
-    //
-    // Allocate a buffer below 4GB to map the transfer to.
-    //
-    Status = gBS->AllocatePages (
-                    AllocateMaxAddress,
-                    EfiBootServicesData,
-                    MapInfo->NumberOfPages,
-                    &MapInfo->MappedHostAddress
-                    );
-    if (EFI_ERROR (Status)) {
-      FreePool (MapInfo);
-      *NumberOfBytes = 0;
-      return Status;
-    }
-
-    //
-    // If this is a read operation from the Bus Master's point of view,
-    // then copy the contents of the real buffer into the mapped buffer
-    // so the Bus Master can read the contents of the real buffer.
-    //
-    if (Operation == EfiPciOperationBusMasterRead ||
-        Operation == EfiPciOperationBusMasterRead64) {
-      CopyMem (
-        (VOID *) (UINTN) MapInfo->MappedHostAddress,
-        (VOID *) (UINTN) MapInfo->HostAddress,
-        MapInfo->NumberOfBytes
-        );
-    }
-
-    InsertTailList (&RootBridge->Maps, &MapInfo->Link);
-
-    //
-    // The DeviceAddress is the address of the maped buffer below 4GB
-    //
-    *DeviceAddress = MapInfo->MappedHostAddress;
-    //
-    // Return a pointer to the MAP_INFO structure in Mapping
-    //
-    *Mapping       = MapInfo;
-  } else {
-    //
-    // If the root bridge CAN handle performing DMA above 4GB or
-    // the transfer is below 4GB, so the DeviceAddress is simply the
-    // HostAddress
-    //
-    *DeviceAddress = PhysicalAddress;
-    *Mapping       = NO_MAPPING;
-  }
-
-  return EFI_SUCCESS;
+  DmaAbove4GB = RootBridge->DmaAbove4G && (
+                  Operation == EfiPciOperationBusMasterRead64 ||
+                  Operation == EfiPciOperationBusMasterWrite64 ||
+                  Operation == EfiPciOperationBusMasterCommonBuffer64
+                  );
+
+  BmOperation = ConvertDmaOperation (Operation);
+
+  return BmDmaMap (
+           DmaAbove4GB,
+           BmOperation,
+           HostAddress,
+           NumberOfBytes,
+           DeviceAddress,
+           Mapping
+           );
 }
 
 /**
@@ -1191,58 +1131,7 @@ RootBridgeIoUnmap (
   IN VOID                             *Mapping
   )
 {
-  MAP_INFO                 *MapInfo;
-  LIST_ENTRY               *Link;
-  PCI_ROOT_BRIDGE_INSTANCE *RootBridge;
-
-  RootBridge = ROOT_BRIDGE_FROM_THIS (This);
-  //
-  // See if the Map() operation associated with this Unmap() required a mapping
-  // buffer. If a mapping buffer was not required, then this function simply
-  // returns EFI_SUCCESS.
-  //
-  if (Mapping == NO_MAPPING) {
-    return EFI_SUCCESS;
-  }
-
-  MapInfo = NO_MAPPING;
-  for (Link = GetFirstNode (&RootBridge->Maps)
-       ; !IsNull (&RootBridge->Maps, Link)
-       ; Link = GetNextNode (&RootBridge->Maps, Link)
-       ) {
-    MapInfo = MAP_INFO_FROM_LINK (Link);
-    if (MapInfo == Mapping) {
-      break;
-    }
-  }
-  //
-  // Mapping is not a valid value returned by Map()
-  //
-  if (MapInfo != Mapping) {
-    return EFI_INVALID_PARAMETER;
-  }
-  RemoveEntryList (&MapInfo->Link);
-
-  //
-  // If this is a write operation from the Bus Master's point of view,
-  // then copy the contents of the mapped buffer into the real buffer
-  // so the processor can read the contents of the real buffer.
-  //
-  if (MapInfo->Operation == EfiPciOperationBusMasterWrite ||
-      MapInfo->Operation == EfiPciOperationBusMasterWrite64) {
-    CopyMem (
-      (VOID *) (UINTN) MapInfo->HostAddress,
-      (VOID *) (UINTN) MapInfo->MappedHostAddress,
-      MapInfo->NumberOfBytes
-      );
-  }
-
-  //
-  // Free the mapped buffer and the MAP_INFO structure.
-  //
-  gBS->FreePages (MapInfo->MappedHostAddress, MapInfo->NumberOfPages);
-  FreePool (Mapping);
-  return EFI_SUCCESS;
+  return BmDmaUnmap (Mapping);
 }
 
 /**
@@ -1282,56 +1171,23 @@ RootBridgeIoAllocateBuffer (
   IN  UINT64                           Attributes
   )
 {
-  EFI_STATUS                Status;
-  EFI_PHYSICAL_ADDRESS      PhysicalAddress;
-  PCI_ROOT_BRIDGE_INSTANCE  *RootBridge;
-  EFI_ALLOCATE_TYPE         AllocateType;
+  PCI_ROOT_BRIDGE_INSTANCE *RootBridge;
+  BOOLEAN                  DmaAbove4GB;
 
-  //
-  // Validate Attributes
-  //
   if ((Attributes & EFI_PCI_ATTRIBUTE_INVALID_FOR_ALLOCATE_BUFFER) != 0) {
     return EFI_UNSUPPORTED;
   }
 
-  //
-  // Check for invalid inputs
-  //
-  if (HostAddress == NULL) {
-    return EFI_INVALID_PARAMETER;
-  }
-
-  //
-  // The only valid memory types are EfiBootServicesData and
-  // EfiRuntimeServicesData
-  //
-  if (MemoryType != EfiBootServicesData &&
-      MemoryType != EfiRuntimeServicesData) {
-    return EFI_INVALID_PARAMETER;
-  }
-
   RootBridge = ROOT_BRIDGE_FROM_THIS (This);
+  DmaAbove4GB = RootBridge->DmaAbove4G &&
+                  (Attributes & EFI_PCI_ATTRIBUTE_DUAL_ADDRESS_CYCLE) != 0;
 
-  AllocateType = AllocateAnyPages;
-  if (!RootBridge->DmaAbove4G ||
-      (Attributes & EFI_PCI_ATTRIBUTE_DUAL_ADDRESS_CYCLE) == 0) {
-    //
-    // Limit allocations to memory below 4GB
-    //
-    AllocateType    = AllocateMaxAddress;
-    PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (SIZE_4GB - 1);
-  }
-  Status = gBS->AllocatePages (
-                  AllocateType,
-                  MemoryType,
-                  Pages,
-                  &PhysicalAddress
-                  );
-  if (!EFI_ERROR (Status)) {
-    *HostAddress = (VOID *) (UINTN) PhysicalAddress;
-  }
-
-  return Status;
+  return BmDmaAllocateBuffer (
+           DmaAbove4GB,
+           MemoryType,
+           Pages,
+           HostAddress
+           );
 }
 
 /**
@@ -1356,7 +1212,7 @@ RootBridgeIoFreeBuffer (
   OUT VOID                             *HostAddress
   )
 {
-  return gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress, Pages);
+  return BmDmaFreeBuffer (Pages, HostAddress);
 }
 
 /**
diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc
index b343c19..47aa9b9 100644
--- a/MdeModulePkg/MdeModulePkg.dsc
+++ b/MdeModulePkg/MdeModulePkg.dsc
@@ -83,6 +83,7 @@ [LibraryClasses]
   PalLib|MdePkg/Library/BasePalLibNull/BasePalLibNull.inf
   CustomizedDisplayLib|MdeModulePkg/Library/CustomizedDisplayLib/CustomizedDisplayLib.inf
   FrameBufferBltLib|MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.inf
+  BmDmaLib|MdeModulePkg/Library/DxeBmDmaLib/DxeBmDmaLib.inf
   #
   # Misc
   #
-- 
1.9.1