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/** @file
Module produces Device I/O on top of PCI Root Bridge I/O for Segment 0 only.
This is a valid assumption because many of the EFI 1.02/EFI 1.10 systems that may have provided
Device I/O were single segment platforms. The goal of the ECP is to provide compatibility with the
drivers/apps that may have used Device I/O.
Device I/O is on list of deprecated protocols for UEFI 2.0 and later.
This module module layers Device I/O on top of PCI Root Bridge I/O (Segment 0)
Use if:
There are no EDK modules present that produces Device I/O
EFI drivers included that consume Device I/O
Platform required to support EFI drivers that consume Device I/O
Platform required to support EFI applications that consume Device I/O
Copyright (c) 2008 - 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.
**/
#include <PiDxe.h>
#include <IndustryStandard/Pci.h>
#include <Protocol/DeviceIo.h>
#include <Protocol/PciRootBridgeIo.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DevicePathLib.h>
/**
Perform reading memory mapped I/O space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The destination buffer to store results.
@retval EFI_SUCCESS The data was read from the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
);
/**
Perform writing memory mapped I/O space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The source buffer of data to be written.
@retval EFI_SUCCESS The data was written to the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
);
/**
Perform reading I/O space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The destination buffer to store results.
@retval EFI_SUCCESS The data was read from the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
);
/**
Perform writing I/O space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The source buffer of data to be written.
@retval EFI_SUCCESS The data was written to the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
);
/**
Perform reading PCI configuration space of device
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The destination buffer to store results.
@retval EFI_SUCCESS The data was read from the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
);
/**
Perform writing PCI configuration space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The source buffer of data to be written.
@retval EFI_SUCCESS The data was written to the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
);
/**
Provides an EFI Device Path for a PCI device with the given PCI configuration space address.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Address The PCI configuration space address of the device
whose Device Path is going to be returned.
@param PciDevicePath A pointer to the pointer for the EFI Device Path
for PciAddress. Memory for the Device Path is
allocated from the pool.
@retval EFI_SUCCESS The PciDevicePath returns a pointer to a valid EFI
Device Path.
@retval EFI_UNSUPPORTED The PciAddress does not map to a valid EFI Device
Path.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
of resources.
**/
EFI_STATUS
EFIAPI
DeviceIoPciDevicePath (
IN EFI_DEVICE_IO_PROTOCOL *This,
IN UINT64 Address,
IN OUT EFI_DEVICE_PATH_PROTOCOL **PciDevicePath
);
/**
Provides the device-specific addresses needed to access system memory.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Operation Indicates if the bus master is going to read or
write to system memory.
@param HostAddress The system memory address to map to the device.
@param NumberOfBytes On input the number of bytes to map. On output the
number of bytes that were mapped.
@param DeviceAddress The resulting map address for the bus master
device to use to access the hosts HostAddress.
@param Mapping A resulting value to pass to Unmap().
@retval EFI_SUCCESS The range was mapped for the returned
NumberOfBytes.
@retval EFI_INVALID_PARAMETER The Operation or HostAddress is undefined.
@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common
buffer.
@retval EFI_DEVICE_ERROR The system hardware could not map the requested
address.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
of resources.
**/
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
);
/**
Completes the Map() operation and releases any corresponding resources.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Mapping The mapping value returned from Map().
@retval EFI_SUCCESS The range was unmapped.
@retval EFI_DEVICE_ERROR The data was not committed to the target system
memory.
**/
EFI_STATUS
EFIAPI
DeviceIoUnmap (
IN EFI_DEVICE_IO_PROTOCOL *This,
IN VOID *Mapping
);
/**
Allocates pages that are suitable for an EFIBusMasterCommonBuffer mapping.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Type The type allocation to perform.
@param MemoryType The type of memory to allocate,
EfiBootServicesData or EfiRuntimeServicesData.
@param Pages The number of pages to allocate.
@param PhysicalAddress A pointer to store the base address of the
allocated range.
@retval EFI_SUCCESS The requested memory pages were allocated.
@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
@retval EFI_INVALID_PARAMETER The requested memory type is invalid.
@retval EFI_UNSUPPORTED The requested PhysicalAddress is not supported on
this platform.
**/
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
);
/**
Flushes any posted write data to the device.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@retval EFI_SUCCESS The buffers were flushed.
@retval EFI_DEVICE_ERROR The buffers were not flushed due to a hardware
error.
**/
EFI_STATUS
EFIAPI
DeviceIoFlush (
IN EFI_DEVICE_IO_PROTOCOL *This
);
/**
Frees pages that were allocated with AllocateBuffer().
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Pages The number of pages to free.
@param HostAddress The base address of the range to free.
@retval EFI_SUCCESS The requested memory pages were freed.
@retval EFI_NOT_FOUND The requested memory pages were not allocated with
AllocateBuffer().
@retval EFI_INVALID_PARAMETER HostAddress is not page aligned or Pages is
invalid.
**/
EFI_STATUS
EFIAPI
DeviceIoFreeBuffer (
IN EFI_DEVICE_IO_PROTOCOL *This,
IN UINTN Pages,
IN EFI_PHYSICAL_ADDRESS HostAddress
);
#define DEVICE_IO_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('D', 'e', 'I', 'O')
typedef struct {
UINTN Signature;
EFI_DEVICE_IO_PROTOCOL DeviceIo;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
UINT16 PrimaryBus;
UINT16 SubordinateBus;
} DEVICE_IO_PRIVATE_DATA;
#define DEVICE_IO_PRIVATE_DATA_FROM_THIS(a) CR (a, DEVICE_IO_PRIVATE_DATA, DeviceIo, DEVICE_IO_PRIVATE_DATA_SIGNATURE)
#define MAX_COMMON_BUFFER 0x00000000FFFFFFFF
EFI_EVENT mPciRootBridgeIoRegistration;
//
// Device Io Volume Protocol template
//
DEVICE_IO_PRIVATE_DATA gDeviceIoPrivateDataTemplate = {
DEVICE_IO_PRIVATE_DATA_SIGNATURE,
{
{
DeviceIoMemRead,
DeviceIoMemWrite
},
{
DeviceIoIoRead,
DeviceIoIoWrite
},
{
DeviceIoPciRead,
DeviceIoPciWrite,
},
DeviceIoMap,
DeviceIoPciDevicePath,
DeviceIoUnmap,
DeviceIoAllocateBuffer,
DeviceIoFlush,
DeviceIoFreeBuffer
},
NULL, // PciRootBridgeIo
NULL, // DevicePath
0, // PrimaryBus
255 // SubordinateBus
};
/**
This notification function is invoked when an instance of the
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL is produced. It installs another instance of the
EFI_DEVICE_IO_PROTOCOL on the same handle.
@param Event The event that occured
@param Context Context of event. Not used in this nofication function.
**/
VOID
EFIAPI
PciRootBridgeIoNotificationEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
UINTN BufferSize;
EFI_HANDLE Handle;
DEVICE_IO_PRIVATE_DATA *Private;
EFI_DEVICE_IO_PROTOCOL *DeviceIo;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *PciRootBridgeIo;
while (TRUE) {
BufferSize = sizeof (Handle);
Status = gBS->LocateHandle (
ByRegisterNotify,
&gEfiPciRootBridgeIoProtocolGuid,
mPciRootBridgeIoRegistration,
&BufferSize,
&Handle
);
if (EFI_ERROR (Status)) {
//
// Exit Path of While Loop....
//
break;
}
//
// Skip this handle if the Device Io Protocol is already installed
//
Status = gBS->HandleProtocol (
Handle,
&gEfiDeviceIoProtocolGuid,
(VOID **)&DeviceIo
);
if (!EFI_ERROR (Status)) {
continue;
}
//
// Retrieve the Pci Root Bridge IO Protocol
//
Status = gBS->HandleProtocol (
Handle,
&gEfiPciRootBridgeIoProtocolGuid,
(VOID **)&PciRootBridgeIo
);
ASSERT_EFI_ERROR (Status);
//
// We only install Device IO for PCI bus in Segment 0.
// See the file description at @file for details.
//
if (PciRootBridgeIo->SegmentNumber != 0) {
continue;
}
//
// Allocate private data structure
//
Private = AllocateCopyPool (sizeof (DEVICE_IO_PRIVATE_DATA), &gDeviceIoPrivateDataTemplate);
if (Private == NULL) {
continue;
}
Private->PciRootBridgeIo = PciRootBridgeIo;
Status = gBS->HandleProtocol (
Handle,
&gEfiDevicePathProtocolGuid,
(VOID **) &Private->DevicePath
);
//
// Install Device Io onto same handle
//
Status = gBS->InstallMultipleProtocolInterfaces (
&Handle,
&gEfiDeviceIoProtocolGuid,
&Private->DeviceIo,
NULL
);
ASSERT_EFI_ERROR (Status);
}
}
/**
The user Entry Point for DXE driver. The user code starts with this function
as the real entry point for the image goes into a library that calls this
function.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
InitializeDeviceIo (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EfiCreateProtocolNotifyEvent (
&gEfiPciRootBridgeIoProtocolGuid,
TPL_CALLBACK,
PciRootBridgeIoNotificationEvent,
NULL,
&mPciRootBridgeIoRegistration
);
return EFI_SUCCESS;
}
/**
Perform reading memory mapped I/O space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The destination buffer to store results.
@retval EFI_SUCCESS The data was read from the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
)
{
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;
}
/**
Perform writing memory mapped I/O space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The source buffer of data to be written.
@retval EFI_SUCCESS The data was written to the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
)
{
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;
}
/**
Perform reading I/O space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The destination buffer to store results.
@retval EFI_SUCCESS The data was read from the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
)
{
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;
}
/**
Perform writing I/O space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The source buffer of data to be written.
@retval EFI_SUCCESS The data was written to the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
)
{
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;
}
/**
Perform reading PCI configuration space of device
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The destination buffer to store results.
@retval EFI_SUCCESS The data was read from the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
)
{
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;
}
/**
Perform writing PCI configuration space of device.
@param This A pointer to EFI_DEVICE_IO protocol instance.
@param Width Width of I/O operations.
@param Address The base address of I/O operations.
@param Count The number of I/O operations to perform. Bytes
moves is Width size * Count, starting at Address.
@param Buffer The source buffer of data to be written.
@retval EFI_SUCCESS The data was written to the device.
@retval EFI_INVALID_PARAMETER Width is invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to lack of
resources.
**/
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
)
{
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;
}
/**
Append a PCI device path node to another device path.
@param Private A pointer to DEVICE_IO_PRIVATE_DATA instance.
@param Bus PCI bus number of the device.
@param Device PCI device number of the device.
@param Function PCI function number of the device.
@param DevicePath Original device path which will be appended a PCI
device path node.
@param BridgePrimaryBus Primary bus number of the bridge.
@param BridgeSubordinateBus Subordinate bus number of the bridge.
@return Pointer to the appended PCI device path.
**/
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
)
{
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;
} else {
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) != HEADER_TYPE_MULTI_FUNCTION)) {
//
// Skip sub functions, this is not a multi function device
//
ThisFunc = 8;
}
}
}
}
}
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;
}
/**
Provides an EFI Device Path for a PCI device with the given PCI configuration space address.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Address The PCI configuration space address of the device
whose Device Path is going to be returned.
@param PciDevicePath A pointer to the pointer for the EFI Device Path
for PciAddress. Memory for the Device Path is
allocated from the pool.
@retval EFI_SUCCESS The PciDevicePath returns a pointer to a valid EFI
Device Path.
@retval EFI_UNSUPPORTED The PciAddress does not map to a valid EFI Device
Path.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
of resources.
**/
EFI_STATUS
EFIAPI
DeviceIoPciDevicePath (
IN EFI_DEVICE_IO_PROTOCOL *This,
IN UINT64 Address,
IN OUT EFI_DEVICE_PATH_PROTOCOL **PciDevicePath
)
{
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;
}
/**
Provides the device-specific addresses needed to access system memory.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Operation Indicates if the bus master is going to read or
write to system memory.
@param HostAddress The system memory address to map to the device.
@param NumberOfBytes On input the number of bytes to map. On output the
number of bytes that were mapped.
@param DeviceAddress The resulting map address for the bus master
device to use to access the hosts HostAddress.
@param Mapping A resulting value to pass to Unmap().
@retval EFI_SUCCESS The range was mapped for the returned
NumberOfBytes.
@retval EFI_INVALID_PARAMETER The Operation or HostAddress is undefined.
@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common
buffer.
@retval EFI_DEVICE_ERROR The system hardware could not map the requested
address.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
of resources.
**/
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
)
{
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;
}
/**
Completes the Map() operation and releases any corresponding resources.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Mapping The mapping value returned from Map().
@retval EFI_SUCCESS The range was unmapped.
@retval EFI_DEVICE_ERROR The data was not committed to the target system
memory.
**/
EFI_STATUS
EFIAPI
DeviceIoUnmap (
IN EFI_DEVICE_IO_PROTOCOL *This,
IN VOID *Mapping
)
{
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;
}
/**
Allocates pages that are suitable for an EFIBusMasterCommonBuffer mapping.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Type The type allocation to perform.
@param MemoryType The type of memory to allocate,
EfiBootServicesData or EfiRuntimeServicesData.
@param Pages The number of pages to allocate.
@param PhysicalAddress A pointer to store the base address of the
allocated range.
@retval EFI_SUCCESS The requested memory pages were allocated.
@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
@retval EFI_INVALID_PARAMETER The requested memory type is invalid.
@retval EFI_UNSUPPORTED The requested PhysicalAddress is not supported on
this platform.
**/
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
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS HostAddress;
DEVICE_IO_PRIVATE_DATA *Private;
VOID *HostAddress2;
Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
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;
}
HostAddress2 = (VOID *) (UINTN) (HostAddress);
Status = Private->PciRootBridgeIo->AllocateBuffer (
Private->PciRootBridgeIo,
Type,
MemoryType,
Pages,
&HostAddress2,
EFI_PCI_ATTRIBUTE_MEMORY_WRITE_COMBINE |
EFI_PCI_ATTRIBUTE_MEMORY_CACHED
);
if (EFI_ERROR (Status)) {
return Status;
}
*PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress2;
return EFI_SUCCESS;
}
/**
Flushes any posted write data to the device.
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@retval EFI_SUCCESS The buffers were flushed.
@retval EFI_DEVICE_ERROR The buffers were not flushed due to a hardware
error.
**/
EFI_STATUS
EFIAPI
DeviceIoFlush (
IN EFI_DEVICE_IO_PROTOCOL *This
)
{
EFI_STATUS Status;
DEVICE_IO_PRIVATE_DATA *Private;
Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
Status = Private->PciRootBridgeIo->Flush (Private->PciRootBridgeIo);
return Status;
}
/**
Frees pages that were allocated with AllocateBuffer().
@param This A pointer to the EFI_DEVICE_IO_INTERFACE instance.
@param Pages The number of pages to free.
@param HostAddress The base address of the range to free.
@retval EFI_SUCCESS The requested memory pages were freed.
@retval EFI_NOT_FOUND The requested memory pages were not allocated with
AllocateBuffer().
@retval EFI_INVALID_PARAMETER HostAddress is not page aligned or Pages is
invalid.
**/
EFI_STATUS
EFIAPI
DeviceIoFreeBuffer (
IN EFI_DEVICE_IO_PROTOCOL *This,
IN UINTN Pages,
IN EFI_PHYSICAL_ADDRESS HostAddress
)
{
DEVICE_IO_PRIVATE_DATA *Private;
Private = DEVICE_IO_PRIVATE_DATA_FROM_THIS (This);
if (((HostAddress & EFI_PAGE_MASK) != 0) || (Pages <= 0)) {
return EFI_INVALID_PARAMETER;
}
return Private->PciRootBridgeIo->FreeBuffer (
Private->PciRootBridgeIo,
Pages,
(VOID *) (UINTN) HostAddress
);
}
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