X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdePkg%2FInclude%2FProtocol%2FDevicePathUtilities.h;h=72ea8da0171c2eb3e1725c2f2e8808a03b5223ff;hp=3874d63491dbf8a120ce16f6689ed454714ac460;hb=fed5f4475948fd09cb71ba4c9f3918af1c3a7ba6;hpb=19bee90c32772dd225332193858d9c2fcd2930aa
diff --git a/MdePkg/Include/Protocol/DevicePathUtilities.h b/MdePkg/Include/Protocol/DevicePathUtilities.h
index 3874d63491..72ea8da017 100644
--- a/MdePkg/Include/Protocol/DevicePathUtilities.h
+++ b/MdePkg/Include/Protocol/DevicePathUtilities.h
@@ -2,8 +2,8 @@
EFI_DEVICE_PATH_UTILITIES_PROTOCOL as defined in UEFI 2.0.
Use to create and manipulate device paths and device nodes.
- Copyright (c) 2006, Intel Corporation
- All rights reserved. This program and the accompanying materials
+ Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.
+ 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
@@ -16,12 +16,9 @@
#ifndef __DEVICE_PATH_UTILITIES_PROTOCOL_H__
#define __DEVICE_PATH_UTILITIES_PROTOCOL_H__
-
-#include
-
-//
-// Device Path Utilities protocol
-//
+///
+/// Device Path Utilities protocol
+///
#define EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID \
{ \
0x379be4e, 0xd706, 0x437d, {0xb0, 0x37, 0xed, 0xb8, 0x2f, 0xb7, 0x72, 0xa4 } \
@@ -32,15 +29,15 @@
@param DevicePath Points to the start of the EFI device path.
- @retval Size Size of the specified device path, in bytes, including the end-of-path tag.
+ @return Size Size of the specified device path, in bytes, including the end-of-path tag.
+ @retval 0 DevicePath is NULL
**/
typedef
UINTN
(EFIAPI *EFI_DEVICE_PATH_UTILS_GET_DEVICE_PATH_SIZE)(
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
- )
-;
+ );
/**
@@ -49,25 +46,26 @@ UINTN
@param DevicePath Points to the source EFI device path.
@retval Pointer A pointer to the duplicate device path.
- @retval NULL insufficient memory
+ @retval NULL insufficient memory or DevicePath is NULL
**/
typedef
EFI_DEVICE_PATH_PROTOCOL*
(EFIAPI *EFI_DEVICE_PATH_UTILS_DUP_DEVICE_PATH)(
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
- )
-;
+ );
/**
Create a new path by appending the second device path to the first.
+ If Src1 is NULL and Src2 is non-NULL, then a duplicate of Src2 is returned.
+ If Src1 is non-NULL and Src2 is NULL, then a duplicate of Src1 is returned.
+ If Src1 and Src2 are both NULL, then a copy of an end-of-device-path is returned.
- @param Src1 Points to the first device path. If NULL, then it is ignored.
- @param Src2 Points to the second device path. If NULL, then it is ignored.
+ @param Src1 Points to the first device path.
+ @param Src2 Points to the second device path.
@retval Pointer A pointer to the newly created device path.
@retval NULL Memory could not be allocated
- or either DevicePath or DeviceNode is NULL.
**/
typedef
@@ -75,18 +73,19 @@ EFI_DEVICE_PATH_PROTOCOL*
(EFIAPI *EFI_DEVICE_PATH_UTILS_APPEND_PATH)(
IN CONST EFI_DEVICE_PATH_PROTOCOL *Src1,
IN CONST EFI_DEVICE_PATH_PROTOCOL *Src2
- )
-;
+ );
/**
Creates a new path by appending the device node to the device path.
+ If DeviceNode is NULL then a copy of DevicePath is returned.
+ If DevicePath is NULL then a copy of DeviceNode, followed by an end-of-device path device node is returned.
+ If both DeviceNode and DevicePath are NULL then a copy of an end-of-device-path device node is returned.
@param DevicePath Points to the device path.
@param DeviceNode Points to the device node.
@retval Pointer A pointer to the allocated device node.
- @retval NULL Memory could not be allocated
- or either DevicePath or DeviceNode is NULL.
+ @retval NULL There was insufficient memory.
**/
typedef
@@ -94,8 +93,7 @@ EFI_DEVICE_PATH_PROTOCOL*
(EFIAPI *EFI_DEVICE_PATH_UTILS_APPEND_NODE)(
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode
- )
-;
+ );
/**
Creates a new path by appending the specified device path instance to the specified device path.
@@ -112,8 +110,7 @@ EFI_DEVICE_PATH_PROTOCOL*
(EFIAPI *EFI_DEVICE_PATH_UTILS_APPEND_INSTANCE)(
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance
- )
-;
+ );
/**
Creates a copy of the current device path instance and returns a pointer to the next device path
@@ -124,7 +121,8 @@ EFI_DEVICE_PATH_PROTOCOL*
device path instance or NULL if there are no more device
path instances in the device path.
@param DevicePathInstanceSize On output, this holds the size of the device path instance,
- in bytes or zero, if DevicePathInstance is zero.
+ in bytes or zero, if DevicePathInstance is NULL.
+ If NULL, then the instance size is not output.
@retval Pointer A pointer to the copy of the current device path instance.
@retval NULL DevicePathInstace was NULL on entry or there was insufficient memory.
@@ -135,8 +133,7 @@ EFI_DEVICE_PATH_PROTOCOL*
(EFIAPI *EFI_DEVICE_PATH_UTILS_GET_NEXT_INSTANCE)(
IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePathInstance,
OUT UINTN *DevicePathInstanceSize
- )
-;
+ );
/**
Creates a device node
@@ -155,12 +152,11 @@ EFI_DEVICE_PATH_PROTOCOL*
**/
typedef
EFI_DEVICE_PATH_PROTOCOL*
-(EFIAPI *EFI_DEVICE_PATH_CREATE_NODE)(
+(EFIAPI *EFI_DEVICE_PATH_UTILS_CREATE_NODE)(
IN UINT8 NodeType,
IN UINT8 NodeSubType,
IN UINT16 NodeLength
-)
-;
+);
/**
Returns whether a device path is multi-instance.
@@ -175,10 +171,11 @@ typedef
BOOLEAN
(EFIAPI *EFI_DEVICE_PATH_UTILS_IS_MULTI_INSTANCE)(
IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
- )
-;
+ );
-
+///
+/// This protocol is used to creates and manipulates device paths and device nodes.
+///
typedef struct {
EFI_DEVICE_PATH_UTILS_GET_DEVICE_PATH_SIZE GetDevicePathSize;
EFI_DEVICE_PATH_UTILS_DUP_DEVICE_PATH DuplicateDevicePath;
@@ -187,7 +184,7 @@ typedef struct {
EFI_DEVICE_PATH_UTILS_APPEND_INSTANCE AppendDevicePathInstance;
EFI_DEVICE_PATH_UTILS_GET_NEXT_INSTANCE GetNextDevicePathInstance;
EFI_DEVICE_PATH_UTILS_IS_MULTI_INSTANCE IsDevicePathMultiInstance;
- EFI_DEVICE_PATH_CREATE_NODE CreateDeviceNode;
+ EFI_DEVICE_PATH_UTILS_CREATE_NODE CreateDeviceNode;
} EFI_DEVICE_PATH_UTILITIES_PROTOCOL;
extern EFI_GUID gEfiDevicePathUtilitiesProtocolGuid;