+++ /dev/null
-/*++
-
-Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
-This program and the accompanying materials
-are licensed and made available under the terms and conditions of the BSD License
-which accompanies this distribution. The full text of the license may be found at
-http://opensource.org/licenses/bsd-license.php
-
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-Module Name:
-
- DeviceIo.c
-
-Abstract:
-
- EFI PC-AT PCI Device IO driver
-
---*/
-#include "PcatPciRootBridge.h"
-#include "DeviceIo.h"
-
-EFI_STATUS
-DeviceIoConstructor (
- IN EFI_HANDLE Handle,
- IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo,
- IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
- IN UINT16 PrimaryBus,
- IN UINT16 SubordinateBus
- )
-/*++
-
-Routine Description:
-
- Initialize and install a Device IO protocol on a empty device path handle.
-
-Arguments:
-
- Handle - Handle of PCI RootBridge IO instance
- PciRootBridgeIo - PCI RootBridge IO instance
- DevicePath - Device Path of PCI RootBridge IO instance
- PrimaryBus - Primary Bus
- SubordinateBus - Subordinate Bus
-
-Returns:
-
- EFI_SUCCESS - This driver is added to ControllerHandle.
- EFI_ALREADY_STARTED - This driver is already running on ControllerHandle.
- Others - This driver does not support this device.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- //
- // Initialize the Device IO device instance.
- //
- Private = AllocateZeroPool (sizeof (DEVICE_IO_PRIVATE_DATA));
- if (Private == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
-
- Private->Signature = DEVICE_IO_PRIVATE_DATA_SIGNATURE;
- Private->Handle = Handle;
- Private->PciRootBridgeIo = PciRootBridgeIo;
- Private->DevicePath = DevicePath;
- Private->PrimaryBus = PrimaryBus;
- Private->SubordinateBus = SubordinateBus;
-
- Private->DeviceIo.Mem.Read = DeviceIoMemRead;
- Private->DeviceIo.Mem.Write = DeviceIoMemWrite;
- Private->DeviceIo.Io.Read = DeviceIoIoRead;
- Private->DeviceIo.Io.Write = DeviceIoIoWrite;
- Private->DeviceIo.Pci.Read = DeviceIoPciRead;
- Private->DeviceIo.Pci.Write = DeviceIoPciWrite;
- Private->DeviceIo.PciDevicePath = DeviceIoPciDevicePath;
- Private->DeviceIo.Map = DeviceIoMap;
- Private->DeviceIo.Unmap = DeviceIoUnmap;
- Private->DeviceIo.AllocateBuffer = DeviceIoAllocateBuffer;
- Private->DeviceIo.Flush = DeviceIoFlush;
- Private->DeviceIo.FreeBuffer = DeviceIoFreeBuffer;
-
- //
- // Install protocol interfaces for the Device IO device.
- //
- Status = gBS->InstallMultipleProtocolInterfaces (
- &Private->Handle,
- &gEfiDeviceIoProtocolGuid,
- &Private->DeviceIo,
- NULL
- );
- ASSERT_EFI_ERROR (Status);
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoMemRead (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN EFI_IO_WIDTH Width,
- IN UINT64 Address,
- IN UINTN Count,
- IN OUT VOID *Buffer
- )
-/*++
-
-Routine Description:
-
- Perform reading memory mapped I/O space of device.
-
-Arguments:
-
- This - A pointer to EFI_DEVICE_IO protocol instance.
- Width - Width of I/O operations.
- Address - The base address of I/O operations.
- Count - The number of I/O operations to perform.
- Bytes moves is Width size * Count, starting at Address.
- Buffer - The destination buffer to store results.
-
-Returns:
-
- EFI_SUCCESS - The data was read from the device.
- EFI_INVALID_PARAMETER - Width is invalid.
- EFI_OUT_OF_RESOURCES - The request could not be completed due to lack of resources.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- if (Width > MMIO_COPY_UINT64) {
- return EFI_INVALID_PARAMETER;
- }
- if (Width >= MMIO_COPY_UINT8) {
- Width = (EFI_IO_WIDTH) (Width - MMIO_COPY_UINT8);
- Status = Private->PciRootBridgeIo->CopyMem (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width,
- (UINT64)(UINTN) Buffer,
- Address,
- Count
- );
- } else {
- Status = Private->PciRootBridgeIo->Mem.Read (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width,
- Address,
- Count,
- Buffer
- );
- }
-
- return Status;
-}
-
-
-
-EFI_STATUS
-EFIAPI
-DeviceIoMemWrite (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN EFI_IO_WIDTH Width,
- IN UINT64 Address,
- IN UINTN Count,
- IN OUT VOID *Buffer
- )
-/*++
-
-Routine Description:
-
- Perform writing memory mapped I/O space of device.
-
-Arguments:
-
- This - A pointer to EFI_DEVICE_IO protocol instance.
- Width - Width of I/O operations.
- Address - The base address of I/O operations.
- Count - The number of I/O operations to perform.
- Bytes moves is Width size * Count, starting at Address.
- Buffer - The source buffer of data to be written.
-
-Returns:
-
- EFI_SUCCESS - The data was written to the device.
- EFI_INVALID_PARAMETER - Width is invalid.
- EFI_OUT_OF_RESOURCES - The request could not be completed due to lack of resources.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- if (Width > MMIO_COPY_UINT64) {
- return EFI_INVALID_PARAMETER;
- }
- if (Width >= MMIO_COPY_UINT8) {
- Width = (EFI_IO_WIDTH) (Width - MMIO_COPY_UINT8);
- Status = Private->PciRootBridgeIo->CopyMem (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width,
- Address,
- (UINT64)(UINTN) Buffer,
- Count
- );
- } else {
- Status = Private->PciRootBridgeIo->Mem.Write (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width,
- Address,
- Count,
- Buffer
- );
- }
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoIoRead (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN EFI_IO_WIDTH Width,
- IN UINT64 Address,
- IN UINTN Count,
- IN OUT VOID *Buffer
- )
-/*++
-
-Routine Description:
-
- Perform reading I/O space of device.
-
-Arguments:
-
- This - A pointer to EFI_DEVICE_IO protocol instance.
- Width - Width of I/O operations.
- Address - The base address of I/O operations.
- Count - The number of I/O operations to perform.
- Bytes moves is Width size * Count, starting at Address.
- Buffer - The destination buffer to store results.
-
-Returns:
-
- EFI_SUCCESS - The data was read from the device.
- EFI_INVALID_PARAMETER - Width is invalid.
- EFI_OUT_OF_RESOURCES - The request could not be completed due to lack of resources.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- if (Width >= MMIO_COPY_UINT8) {
- return EFI_INVALID_PARAMETER;
- }
-
- Status = Private->PciRootBridgeIo->Io.Read (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width,
- Address,
- Count,
- Buffer
- );
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoIoWrite (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN EFI_IO_WIDTH Width,
- IN UINT64 Address,
- IN UINTN Count,
- IN OUT VOID *Buffer
- )
-/*++
-
-Routine Description:
-
- Perform writing I/O space of device.
-
-Arguments:
-
- This - A pointer to EFI_DEVICE_IO protocol instance.
- Width - Width of I/O operations.
- Address - The base address of I/O operations.
- Count - The number of I/O operations to perform.
- Bytes moves is Width size * Count, starting at Address.
- Buffer - The source buffer of data to be written.
-
-Returns:
-
- EFI_SUCCESS - The data was written to the device.
- EFI_INVALID_PARAMETER - Width is invalid.
- EFI_OUT_OF_RESOURCES - The request could not be completed due to lack of resources.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- if (Width >= MMIO_COPY_UINT8) {
- return EFI_INVALID_PARAMETER;
- }
-
- Status = Private->PciRootBridgeIo->Io.Write (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width,
- Address,
- Count,
- Buffer
- );
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoPciRead (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN EFI_IO_WIDTH Width,
- IN UINT64 Address,
- IN UINTN Count,
- IN OUT VOID *Buffer
- )
-/*++
-
-Routine Description:
-
- Perform reading PCI configuration space of device
-
-Arguments:
-
- This - A pointer to EFI_DEVICE_IO protocol instance.
- Width - Width of I/O operations.
- Address - The base address of I/O operations.
- Count - The number of I/O operations to perform.
- Bytes moves is Width size * Count, starting at Address.
- Buffer - The destination buffer to store results.
-
-Returns:
-
- EFI_SUCCESS - The data was read from the device.
- EFI_INVALID_PARAMETER - Width is invalid.
- EFI_OUT_OF_RESOURCES - The request could not be completed due to lack of resources.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- if ((UINT32)Width >= MMIO_COPY_UINT8) {
- return EFI_INVALID_PARAMETER;
- }
-
- Status = Private->PciRootBridgeIo->Pci.Read (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width,
- Address,
- Count,
- Buffer
- );
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoPciWrite (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN EFI_IO_WIDTH Width,
- IN UINT64 Address,
- IN UINTN Count,
- IN OUT VOID *Buffer
- )
-/*++
-
-Routine Description:
-
- Perform writing PCI configuration space of device.
-
-Arguments:
-
- This - A pointer to EFI_DEVICE_IO protocol instance.
- Width - Width of I/O operations.
- Address - The base address of I/O operations.
- Count - The number of I/O operations to perform.
- Bytes moves is Width size * Count, starting at Address.
- Buffer - The source buffer of data to be written.
-
-Returns:
-
- EFI_SUCCESS - The data was written to the device.
- EFI_INVALID_PARAMETER - Width is invalid.
- EFI_OUT_OF_RESOURCES - The request could not be completed due to lack of resources.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- if ((UINT32)Width >= MMIO_COPY_UINT8) {
- return EFI_INVALID_PARAMETER;
- }
-
- Status = Private->PciRootBridgeIo->Pci.Write (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width,
- Address,
- Count,
- Buffer
- );
-
- return Status;
-}
-
-EFI_DEVICE_PATH_PROTOCOL *
-AppendPciDevicePath (
- IN DEVICE_IO_PRIVATE_DATA *Private,
- IN UINT8 Bus,
- IN UINT8 Device,
- IN UINT8 Function,
- IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
- IN OUT UINT16 *BridgePrimaryBus,
- IN OUT UINT16 *BridgeSubordinateBus
- )
-/*++
-
-Routine Description:
-
- Append a PCI device path node to another device path.
-
-Arguments:
-
- Private - A pointer to DEVICE_IO_PRIVATE_DATA instance.
- Bus - PCI bus number of the device.
- Device - PCI device number of the device.
- Function - PCI function number of the device.
- DevicePath - Original device path which will be appended a PCI device path node.
- BridgePrimaryBus - Primary bus number of the bridge.
- BridgeSubordinateBus - Subordinate bus number of the bridge.
-
-Returns:
-
- Pointer to the appended PCI device path.
-
---*/
-{
- UINT16 ThisBus;
- UINT8 ThisDevice;
- UINT8 ThisFunc;
- UINT64 Address;
- PCI_TYPE01 PciBridge;
- PCI_TYPE01 *PciPtr;
- EFI_DEVICE_PATH_PROTOCOL *ReturnDevicePath;
- PCI_DEVICE_PATH PciNode;
-
- PciPtr = &PciBridge;
- for (ThisBus = *BridgePrimaryBus; ThisBus <= *BridgeSubordinateBus; ThisBus++) {
- for (ThisDevice = 0; ThisDevice <= PCI_MAX_DEVICE; ThisDevice++) {
- for (ThisFunc = 0; ThisFunc <= PCI_MAX_FUNC; ThisFunc++) {
- Address = EFI_PCI_ADDRESS (ThisBus, ThisDevice, ThisFunc, 0);
- ZeroMem (PciPtr, sizeof (PCI_TYPE01));
- Private->DeviceIo.Pci.Read (
- &Private->DeviceIo,
- IO_UINT32,
- Address,
- 1,
- &(PciPtr->Hdr.VendorId)
- );
- if ((PciPtr->Hdr.VendorId == 0xffff) && (ThisFunc == 0)) {
- break;
- }
- if (PciPtr->Hdr.VendorId == 0xffff) {
- continue;
- }
-
- Private->DeviceIo.Pci.Read (
- &Private->DeviceIo,
- IO_UINT32,
- Address,
- sizeof (PCI_TYPE01) / sizeof (UINT32),
- PciPtr
- );
- if (IS_PCI_BRIDGE (PciPtr)) {
- if (Bus >= PciPtr->Bridge.SecondaryBus && Bus <= PciPtr->Bridge.SubordinateBus) {
-
- PciNode.Header.Type = HARDWARE_DEVICE_PATH;
- PciNode.Header.SubType = HW_PCI_DP;
- SetDevicePathNodeLength (&PciNode.Header, sizeof (PciNode));
-
- PciNode.Device = ThisDevice;
- PciNode.Function = ThisFunc;
- ReturnDevicePath = AppendDevicePathNode (DevicePath, &PciNode.Header);
-
- *BridgePrimaryBus = PciPtr->Bridge.SecondaryBus;
- *BridgeSubordinateBus = PciPtr->Bridge.SubordinateBus;
- return ReturnDevicePath;
- }
- }
-
- if ((ThisFunc == 0) && ((PciPtr->Hdr.HeaderType & HEADER_TYPE_MULTI_FUNCTION) == 0x0)) {
- //
- // Skip sub functions, this is not a multi function device
- //
- break;
- }
- }
- }
- }
-
- ZeroMem (&PciNode, sizeof (PciNode));
- PciNode.Header.Type = HARDWARE_DEVICE_PATH;
- PciNode.Header.SubType = HW_PCI_DP;
- SetDevicePathNodeLength (&PciNode.Header, sizeof (PciNode));
- PciNode.Device = Device;
- PciNode.Function = Function;
-
- ReturnDevicePath = AppendDevicePathNode (DevicePath, &PciNode.Header);
-
- *BridgePrimaryBus = 0xffff;
- *BridgeSubordinateBus = 0xffff;
- return ReturnDevicePath;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoPciDevicePath (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN UINT64 Address,
- IN OUT EFI_DEVICE_PATH_PROTOCOL **PciDevicePath
- )
-/*++
-
-Routine Description:
-
- Provides an EFI Device Path for a PCI device with the given PCI configuration space address.
-
-Arguments:
-
- This - A pointer to the EFI_DEVICE_IO_INTERFACE instance.
- Address - The PCI configuration space address of the device whose Device Path
- is going to be returned.
- PciDevicePath - A pointer to the pointer for the EFI Device Path for PciAddress.
- Memory for the Device Path is allocated from the pool.
-
-Returns:
-
- EFI_SUCCESS - The PciDevicePath returns a pointer to a valid EFI Device Path.
- EFI_UNSUPPORTED - The PciAddress does not map to a valid EFI Device Path.
- EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
-
---*/
-{
- DEVICE_IO_PRIVATE_DATA *Private;
- UINT16 PrimaryBus;
- UINT16 SubordinateBus;
- UINT8 Bus;
- UINT8 Device;
- UINT8 Func;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- Bus = (UINT8) (((UINT32) Address >> 24) & 0xff);
- Device = (UINT8) (((UINT32) Address >> 16) & 0xff);
- Func = (UINT8) (((UINT32) Address >> 8) & 0xff);
-
- if (Bus < Private->PrimaryBus || Bus > Private->SubordinateBus) {
- return EFI_UNSUPPORTED;
- }
-
- *PciDevicePath = Private->DevicePath;
- PrimaryBus = Private->PrimaryBus;
- SubordinateBus = Private->SubordinateBus;
- do {
- *PciDevicePath = AppendPciDevicePath (
- Private,
- Bus,
- Device,
- Func,
- *PciDevicePath,
- &PrimaryBus,
- &SubordinateBus
- );
- if (*PciDevicePath == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- } while (PrimaryBus != 0xffff);
-
- return EFI_SUCCESS;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoMap (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN EFI_IO_OPERATION_TYPE Operation,
- IN EFI_PHYSICAL_ADDRESS *HostAddress,
- IN OUT UINTN *NumberOfBytes,
- OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
- OUT VOID **Mapping
- )
-/*++
-
-Routine Description:
-
- Provides the device-specific addresses needed to access system memory.
-
-Arguments:
-
- This - A pointer to the EFI_DEVICE_IO_INTERFACE instance.
- Operation - Indicates if the bus master is going to read or write to system memory.
- HostAddress - The system memory address to map to the device.
- NumberOfBytes - On input the number of bytes to map. On output the number of bytes
- that were mapped.
- DeviceAddress - The resulting map address for the bus master device to use to access the
- hosts HostAddress.
- Mapping - A resulting value to pass to Unmap().
-
-Returns:
-
- EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.
- EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.
- EFI_UNSUPPORTED - The HostAddress cannot be mapped as a common buffer.
- EFI_DEVICE_ERROR - The system hardware could not map the requested address.
- EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- if ((UINT32)Operation > EfiBusMasterCommonBuffer) {
- return EFI_INVALID_PARAMETER;
- }
-
- if (((UINTN) (*HostAddress) != (*HostAddress)) && Operation == EfiBusMasterCommonBuffer) {
- return EFI_UNSUPPORTED;
- }
-
- Status = Private->PciRootBridgeIo->Map (
- Private->PciRootBridgeIo,
- (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION) Operation,
- (VOID *) (UINTN) (*HostAddress),
- NumberOfBytes,
- DeviceAddress,
- Mapping
- );
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoUnmap (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN VOID *Mapping
- )
-/*++
-
-Routine Description:
-
- Completes the Map() operation and releases any corresponding resources.
-
-Arguments:
-
- This - A pointer to the EFI_DEVICE_IO_INTERFACE instance.
- Mapping - The mapping value returned from Map().
-
-Returns:
-
- EFI_SUCCESS - The range was unmapped.
- EFI_DEVICE_ERROR - The data was not committed to the target system memory.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- Status = Private->PciRootBridgeIo->Unmap (
- Private->PciRootBridgeIo,
- Mapping
- );
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoAllocateBuffer (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN EFI_ALLOCATE_TYPE Type,
- IN EFI_MEMORY_TYPE MemoryType,
- IN UINTN Pages,
- IN OUT EFI_PHYSICAL_ADDRESS *PhysicalAddress
- )
-/*++
-
-Routine Description:
-
- Allocates pages that are suitable for an EFIBusMasterCommonBuffer mapping.
-
-Arguments:
-
- This - A pointer to the EFI_DEVICE_IO_INTERFACE instance.
- Type - The type allocation to perform.
- MemoryType - The type of memory to allocate, EfiBootServicesData or
- EfiRuntimeServicesData.
- Pages - The number of pages to allocate.
- PhysicalAddress - A pointer to store the base address of the allocated range.
-
-Returns:
-
- EFI_SUCCESS - The requested memory pages were allocated.
- EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
- EFI_INVALID_PARAMETER - The requested memory type is invalid.
- EFI_UNSUPPORTED - The requested PhysicalAddress is not supported on
- this platform.
-
---*/
-{
- EFI_STATUS Status;
- EFI_PHYSICAL_ADDRESS HostAddress;
-
- HostAddress = *PhysicalAddress;
-
- if ((MemoryType != EfiBootServicesData) && (MemoryType != EfiRuntimeServicesData)) {
- return EFI_INVALID_PARAMETER;
- }
-
- if ((UINT32)Type >= MaxAllocateType) {
- return EFI_INVALID_PARAMETER;
- }
-
- if ((Type == AllocateAddress) && (HostAddress + EFI_PAGES_TO_SIZE (Pages) - 1 > MAX_COMMON_BUFFER)) {
- return EFI_UNSUPPORTED;
- }
-
- if ((AllocateAnyPages == Type) || (AllocateMaxAddress == Type && HostAddress > MAX_COMMON_BUFFER)) {
- Type = AllocateMaxAddress;
- HostAddress = MAX_COMMON_BUFFER;
- }
-
- Status = gBS->AllocatePages (
- Type,
- MemoryType,
- Pages,
- &HostAddress
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
-
- *PhysicalAddress = HostAddress;
-
- return EFI_SUCCESS;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoFlush (
- IN EFI_DEVICE_IO_PROTOCOL *This
- )
-/*++
-
-Routine Description:
-
- Flushes any posted write data to the device.
-
-Arguments:
-
- This - A pointer to the EFI_DEVICE_IO_INTERFACE instance.
-
-Returns:
-
- EFI_SUCCESS - The buffers were flushed.
- EFI_DEVICE_ERROR - The buffers were not flushed due to a hardware error.
-
---*/
-{
- EFI_STATUS Status;
- DEVICE_IO_PRIVATE_DATA *Private;
-
- Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
-
- Status = Private->PciRootBridgeIo->Flush (Private->PciRootBridgeIo);
-
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-DeviceIoFreeBuffer (
- IN EFI_DEVICE_IO_PROTOCOL *This,
- IN UINTN Pages,
- IN EFI_PHYSICAL_ADDRESS HostAddress
- )
-/*++
-
-Routine Description:
-
- Frees pages that were allocated with AllocateBuffer().
-
-Arguments:
-
- This - A pointer to the EFI_DEVICE_IO_INTERFACE instance.
- Pages - The number of pages to free.
- HostAddress - The base address of the range to free.
-
-Returns:
-
- EFI_SUCCESS - The requested memory pages were freed.
- EFI_NOT_FOUND - The requested memory pages were not allocated with
- AllocateBuffer().
- EFI_INVALID_PARAMETER - HostAddress is not page aligned or Pages is invalid.
-
---*/
-{
- if (((HostAddress & EFI_PAGE_MASK) != 0) || (Pages <= 0)) {
- return EFI_INVALID_PARAMETER;
- }
-
- return gBS->FreePages (HostAddress, Pages);
-}
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