* [PATCH 0/2] MdePkg/UefiDevicePathLib: Separate the lib instances
@ 2019-11-28 2:15 Gao, Zhichao
2019-11-28 2:15 ` [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path lib Gao, Zhichao
2019-11-28 2:15 ` [PATCH 2/2] MdePkg/dsc: Add UefiDevicePathLibMandatoryDevicePathProtocol for build Gao, Zhichao
0 siblings, 2 replies; 5+ messages in thread
From: Gao, Zhichao @ 2019-11-28 2:15 UTC (permalink / raw)
To: devel; +Cc: Michael D Kinney, Liming Gao, Vitaly Cheptsov
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2298
The UefiDevicePathLibOptionalDevicePathProtocolConstructor's implementation
isn't match with its instance name.
Remove the ASSERT and depex of the gEfiDevicePathUtilitiesProtocolGuid
because of "Optional".
Add a mandatory instance to force using the DevicePathUtilities,
DevicePathToText and DevicePathFromText protocol with the ASSERT
and depex.
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Vitaly Cheptsov <vit9696@protonmail.com>
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
Zhichao Gao (2):
MdePkg/UefiDevicePathLib: Separate the device path lib
MdePkg/dsc: Add UefiDevicePathLibMandatoryDevicePathProtocol for build
...DevicePathLibMandatoryDevicePathProtocol.c | 469 ++++++++++++++++++
...vicePathLibMandatoryDevicePathProtocol.inf | 86 ++++
...vicePathLibMandatoryDevicePathProtocol.uni | 18 +
...iDevicePathLibOptionalDevicePathProtocol.c | 7 +-
...evicePathLibOptionalDevicePathProtocol.inf | 5 +-
MdePkg/MdePkg.dsc | 3 +-
6 files changed, 578 insertions(+), 10 deletions(-)
create mode 100644 MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.c
create mode 100644 MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.inf
create mode 100644 MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.uni
--
2.21.0.windows.1
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path lib
2019-11-28 2:15 [PATCH 0/2] MdePkg/UefiDevicePathLib: Separate the lib instances Gao, Zhichao
@ 2019-11-28 2:15 ` Gao, Zhichao
2019-12-10 1:04 ` Liming Gao
2019-11-28 2:15 ` [PATCH 2/2] MdePkg/dsc: Add UefiDevicePathLibMandatoryDevicePathProtocol for build Gao, Zhichao
1 sibling, 1 reply; 5+ messages in thread
From: Gao, Zhichao @ 2019-11-28 2:15 UTC (permalink / raw)
To: devel; +Cc: Michael D Kinney, Liming Gao, Vitaly Cheptsov
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2298
UefiDevicePathLibOptionalDevicePathProtocol's implementation isn't
fit its description. It should be implement as blow:
Try to find the DevicePathProtocol, if found then use it to implement
the interface. Else, use the local interface. It should not have the
depex and ASSERT of gEfiDevicePathUtilitiesProtocolGuid when not find
the DevicePathProtocol.
Add a mandatory one to force using the DevicePathUtilities,
DevicePathToText and DevicePathFromText protocol.
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Vitaly Cheptsov <vit9696@protonmail.com>
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
---
...DevicePathLibMandatoryDevicePathProtocol.c | 469 ++++++++++++++++++
...vicePathLibMandatoryDevicePathProtocol.inf | 86 ++++
...vicePathLibMandatoryDevicePathProtocol.uni | 18 +
...iDevicePathLibOptionalDevicePathProtocol.c | 7 +-
...evicePathLibOptionalDevicePathProtocol.inf | 5 +-
5 files changed, 576 insertions(+), 9 deletions(-)
create mode 100644 MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.c
create mode 100644 MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.inf
create mode 100644 MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.uni
diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.c b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.c
new file mode 100644
index 0000000000..fa27110fd4
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.c
@@ -0,0 +1,469 @@
+/** @file
+ Device Path services. The thing to remember is device paths are built out of
+ nodes. The device path is terminated by an end node that is length
+ sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is sizeof(EFI_DEVICE_PATH_PROTOCOL)
+ all over this file.
+
+ The only place where multi-instance device paths are supported is in
+ environment varibles. Multi-instance device paths should never be placed
+ on a Handle.
+
+ Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+#include "UefiDevicePathLib.h"
+
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_DEVICE_PATH_UTILITIES_PROTOCOL *mDevicePathLibDevicePathUtilities = NULL;
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *mDevicePathLibDevicePathToText = NULL;
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *mDevicePathLibDevicePathFromText = NULL;
+
+/**
+ The constructor function caches the pointer to DevicePathUtilites protocol,
+ DevicePathToText protocol and DevicePathFromText protocol.
+
+ The constructor function locates these three protocols from protocol database.
+ It will caches the pointer to local protocol instance if that operation fails
+ and it will always return EFI_SUCCESS.
+
+ @param ImageHandle The firmware allocated handle for the EFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+UefiDevicePathLibMandatoryDevicePathProtocolConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = gBS->LocateProtocol (
+ &gEfiDevicePathUtilitiesProtocolGuid,
+ NULL,
+ (VOID**) &mDevicePathLibDevicePathUtilities
+ );
+ ASSERT_EFI_ERROR (Status);
+ ASSERT (mDevicePathLibDevicePathUtilities != NULL);
+
+ Status = gBS->LocateProtocol (
+ &gEfiDevicePathToTextProtocolGuid,
+ NULL,
+ (VOID**) &mDevicePathLibDevicePathToText
+ );
+ ASSERT_EFI_ERROR (Status);
+ ASSERT (mDevicePathLibDevicePathToText != NULL);
+
+ Status = gBS->LocateProtocol (
+ &gEfiDevicePathFromTextProtocolGuid,
+ NULL,
+ (VOID**) &mDevicePathLibDevicePathFromText
+ );
+ ASSERT_EFI_ERROR (Status);
+ ASSERT (mDevicePathLibDevicePathFromText != NULL);
+
+ return Status;
+}
+
+/**
+ Returns the size of a device path in bytes.
+
+ This function returns the size, in bytes, of the device path data structure
+ specified by DevicePath including the end of device path node.
+ If DevicePath is NULL or invalid, then 0 is returned.
+
+ @param DevicePath A pointer to a device path data structure.
+
+ @retval 0 If DevicePath is NULL or invalid.
+ @retval Others The size of a device path in bytes.
+
+**/
+UINTN
+EFIAPI
+GetDevicePathSize (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
+ )
+{
+ if (mDevicePathLibDevicePathUtilities != NULL) {
+ return mDevicePathLibDevicePathUtilities->GetDevicePathSize (DevicePath);
+ }
+
+ ASSERT (FALSE);
+ return 0;
+}
+
+/**
+ Creates a new copy of an existing device path.
+
+ This function allocates space for a new copy of the device path specified by DevicePath.
+ If DevicePath is NULL, then NULL is returned. If the memory is successfully
+ allocated, then the contents of DevicePath are copied to the newly allocated
+ buffer, and a pointer to that buffer is returned. Otherwise, NULL is returned.
+ The memory for the new device path is allocated from EFI boot services memory.
+ It is the responsibility of the caller to free the memory allocated.
+
+ @param DevicePath A pointer to a device path data structure.
+
+ @retval NULL DevicePath is NULL or invalid.
+ @retval Others A pointer to the duplicated device path.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+DuplicateDevicePath (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
+ )
+{
+ if (mDevicePathLibDevicePathUtilities != NULL) {
+ return mDevicePathLibDevicePathUtilities->DuplicateDevicePath (DevicePath);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Creates a new device path by appending a second device path to a first device path.
+
+ This function creates a new device path by appending a copy of SecondDevicePath
+ to a copy of FirstDevicePath in a newly allocated buffer. Only the end-of-device-path
+ device node from SecondDevicePath is retained. The newly created device path is
+ returned. If FirstDevicePath is NULL, then it is ignored, and a duplicate of
+ SecondDevicePath is returned. If SecondDevicePath is NULL, then it is ignored,
+ and a duplicate of FirstDevicePath is returned. If both FirstDevicePath and
+ SecondDevicePath are NULL, then a copy of an end-of-device-path is returned.
+
+ If there is not enough memory for the newly allocated buffer, then NULL is returned.
+ The memory for the new device path is allocated from EFI boot services memory.
+ It is the responsibility of the caller to free the memory allocated.
+
+ @param FirstDevicePath A pointer to a device path data structure.
+ @param SecondDevicePath A pointer to a device path data structure.
+
+ @retval NULL If there is not enough memory for the newly allocated buffer.
+ @retval NULL If FirstDevicePath or SecondDevicePath is invalid.
+ @retval Others A pointer to the new device path if success.
+ Or a copy an end-of-device-path if both FirstDevicePath and SecondDevicePath are NULL.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+AppendDevicePath (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *FirstDevicePath, OPTIONAL
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath OPTIONAL
+ )
+{
+ if (mDevicePathLibDevicePathUtilities != NULL) {
+ return mDevicePathLibDevicePathUtilities->AppendDevicePath (FirstDevicePath, SecondDevicePath);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Creates a new path by appending the device node to the device path.
+
+ This function creates a new device path by appending a copy of the device node
+ specified by DevicePathNode to a copy of the device path specified by DevicePath
+ in an allocated buffer. The end-of-device-path device node is moved after the
+ end of the appended device node.
+ If DevicePathNode is NULL then a copy of DevicePath is returned.
+ If DevicePath is NULL then a copy of DevicePathNode, followed by an end-of-device
+ path device node is returned.
+ If both DevicePathNode and DevicePath are NULL then a copy of an end-of-device-path
+ device node is returned.
+ If there is not enough memory to allocate space for the new device path, then
+ NULL is returned.
+ The memory is allocated from EFI boot services memory. It is the responsibility
+ of the caller to free the memory allocated.
+
+ @param DevicePath A pointer to a device path data structure.
+ @param DevicePathNode A pointer to a single device path node.
+
+ @retval NULL If there is not enough memory for the new device path.
+ @retval Others A pointer to the new device path if success.
+ A copy of DevicePathNode followed by an end-of-device-path node
+ if both FirstDevicePath and SecondDevicePath are NULL.
+ A copy of an end-of-device-path node if both FirstDevicePath
+ and SecondDevicePath are NULL.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+AppendDevicePathNode (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathNode OPTIONAL
+ )
+{
+ if (mDevicePathLibDevicePathUtilities != NULL) {
+ return mDevicePathLibDevicePathUtilities->AppendDeviceNode (DevicePath, DevicePathNode);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Creates a new device path by appending the specified device path instance to the specified device
+ path.
+
+ This function creates a new device path by appending a copy of the device path
+ instance specified by DevicePathInstance to a copy of the device path specified
+ by DevicePath in a allocated buffer.
+ The end-of-device-path device node is moved after the end of the appended device
+ path instance and a new end-of-device-path-instance node is inserted between.
+ If DevicePath is NULL, then a copy if DevicePathInstance is returned.
+ If DevicePathInstance is NULL, then NULL is returned.
+ If DevicePath or DevicePathInstance is invalid, then NULL is returned.
+ If there is not enough memory to allocate space for the new device path, then
+ NULL is returned.
+ The memory is allocated from EFI boot services memory. It is the responsibility
+ of the caller to free the memory allocated.
+
+ @param DevicePath A pointer to a device path data structure.
+ @param DevicePathInstance A pointer to a device path instance.
+
+ @return A pointer to the new device path.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+AppendDevicePathInstance (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance OPTIONAL
+ )
+{
+ if (mDevicePathLibDevicePathUtilities != NULL) {
+ return mDevicePathLibDevicePathUtilities->AppendDevicePathInstance (DevicePath, DevicePathInstance);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Creates a copy of the current device path instance and returns a pointer to the next device path
+ instance.
+
+ This function creates a copy of the current device path instance. It also updates
+ DevicePath to point to the next device path instance in the device path (or NULL
+ if no more) and updates Size to hold the size of the device path instance copy.
+ If DevicePath is NULL, then NULL is returned.
+ If DevicePath points to a invalid device path, then NULL is returned.
+ If there is not enough memory to allocate space for the new device path, then
+ NULL is returned.
+ The memory is allocated from EFI boot services memory. It is the responsibility
+ of the caller to free the memory allocated.
+ If Size is NULL, then ASSERT().
+
+ @param DevicePath On input, this holds the pointer to the current
+ device path instance. On output, this holds
+ the pointer to the next device path instance
+ or NULL if there are no more device path
+ instances in the device path pointer to a
+ device path data structure.
+ @param Size On output, this holds the size of the device
+ path instance, in bytes or zero, if DevicePath
+ is NULL.
+
+ @return A pointer to the current device path instance.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+GetNextDevicePathInstance (
+ IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath,
+ OUT UINTN *Size
+ )
+{
+ if (mDevicePathLibDevicePathUtilities != NULL) {
+ return mDevicePathLibDevicePathUtilities->GetNextDevicePathInstance (DevicePath, Size);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Creates a device node.
+
+ This function creates a new device node in a newly allocated buffer of size
+ NodeLength and initializes the device path node header with NodeType and NodeSubType.
+ The new device path node is returned.
+ If NodeLength is smaller than a device path header, then NULL is returned.
+ If there is not enough memory to allocate space for the new device path, then
+ NULL is returned.
+ The memory is allocated from EFI boot services memory. It is the responsibility
+ of the caller to free the memory allocated.
+
+ @param NodeType The device node type for the new device node.
+ @param NodeSubType The device node sub-type for the new device node.
+ @param NodeLength The length of the new device node.
+
+ @return The new device path.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+CreateDeviceNode (
+ IN UINT8 NodeType,
+ IN UINT8 NodeSubType,
+ IN UINT16 NodeLength
+ )
+{
+ if (mDevicePathLibDevicePathUtilities != NULL) {
+ return mDevicePathLibDevicePathUtilities->CreateDeviceNode (NodeType, NodeSubType, NodeLength);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Determines if a device path is single or multi-instance.
+
+ This function returns TRUE if the device path specified by DevicePath is
+ multi-instance.
+ Otherwise, FALSE is returned.
+ If DevicePath is NULL or invalid, then FALSE is returned.
+
+ @param DevicePath A pointer to a device path data structure.
+
+ @retval TRUE DevicePath is multi-instance.
+ @retval FALSE DevicePath is not multi-instance, or DevicePath
+ is NULL or invalid.
+
+**/
+BOOLEAN
+EFIAPI
+IsDevicePathMultiInstance (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
+ )
+{
+ if (mDevicePathLibDevicePathUtilities != NULL) {
+ return mDevicePathLibDevicePathUtilities->IsDevicePathMultiInstance (DevicePath);
+ }
+
+ ASSERT (FALSE);
+ return FALSE;
+}
+
+/**
+ Converts a device node to its string representation.
+
+ @param DeviceNode A Pointer to the device node to be converted.
+ @param DisplayOnly If DisplayOnly is TRUE, then the shorter text representation
+ of the display node is used, where applicable. If DisplayOnly
+ is FALSE, then the longer text representation of the display node
+ is used.
+ @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut forms of text
+ representation for a device node can be used, where applicable.
+
+ @return A pointer to the allocated text representation of the device node or NULL if DeviceNode
+ is NULL or there was insufficient memory.
+
+**/
+CHAR16 *
+EFIAPI
+ConvertDeviceNodeToText (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode,
+ IN BOOLEAN DisplayOnly,
+ IN BOOLEAN AllowShortcuts
+ )
+{
+ if (mDevicePathLibDevicePathToText != NULL) {
+ return mDevicePathLibDevicePathToText->ConvertDeviceNodeToText (DeviceNode, DisplayOnly, AllowShortcuts);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Converts a device path to its text representation.
+
+ @param DevicePath A Pointer to the device to be converted.
+ @param DisplayOnly If DisplayOnly is TRUE, then the shorter text representation
+ of the display node is used, where applicable. If DisplayOnly
+ is FALSE, then the longer text representation of the display node
+ is used.
+ @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut forms of text
+ representation for a device node can be used, where applicable.
+
+ @return A pointer to the allocated text representation of the device path or
+ NULL if DeviceNode is NULL or there was insufficient memory.
+
+**/
+CHAR16 *
+EFIAPI
+ConvertDevicePathToText (
+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
+ IN BOOLEAN DisplayOnly,
+ IN BOOLEAN AllowShortcuts
+ )
+{
+ if (mDevicePathLibDevicePathToText != NULL) {
+ return mDevicePathLibDevicePathToText->ConvertDevicePathToText (DevicePath, DisplayOnly, AllowShortcuts);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Convert text to the binary representation of a device node.
+
+ @param TextDeviceNode TextDeviceNode points to the text representation of a device
+ node. Conversion starts with the first character and continues
+ until the first non-device node character.
+
+ @return A pointer to the EFI device node or NULL if TextDeviceNode is NULL or there was
+ insufficient memory or text unsupported.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+ConvertTextToDeviceNode (
+ IN CONST CHAR16 *TextDeviceNode
+ )
+{
+ if (mDevicePathLibDevicePathFromText != NULL) {
+ return mDevicePathLibDevicePathFromText->ConvertTextToDeviceNode (TextDeviceNode);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
+/**
+ Convert text to the binary representation of a device path.
+
+
+ @param TextDevicePath TextDevicePath points to the text representation of a device
+ path. Conversion starts with the first character and continues
+ until the first non-device node character.
+
+ @return A pointer to the allocated device path or NULL if TextDeviceNode is NULL or
+ there was insufficient memory.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+ConvertTextToDevicePath (
+ IN CONST CHAR16 *TextDevicePath
+ )
+{
+ if (mDevicePathLibDevicePathFromText != NULL) {
+ return mDevicePathLibDevicePathFromText->ConvertTextToDevicePath (TextDevicePath);
+ }
+
+ ASSERT (FALSE);
+ return NULL;
+}
+
diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.inf b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.inf
new file mode 100644
index 0000000000..eb545d4601
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.inf
@@ -0,0 +1,86 @@
+## @file
+# Instance of Device Path Library based on Device Path Protocol.
+#
+# Device Path Library that layers on top of the UEFI 2.0 Device Path Protocol.
+# If the DevicePathFromText/DevicePathToText protocol doesn't exist, the library
+# uses its internal conversion logic.
+#
+# Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = UefiDevicePathLibMandatoryDevicePathProtocol
+ MODULE_UNI_FILE = UefiDevicePathLibMandatoryDevicePathProtocol.uni
+ FILE_GUID = 5A8389AF-DAE4-407E-8FD5-D026948BC579
+ MODULE_TYPE = UEFI_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = DevicePathLib|DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER SMM_CORE
+
+ CONSTRUCTOR = UefiDevicePathLibMandatoryDevicePathProtocolConstructor
+
+#
+# VALID_ARCHITECTURES = IA32 X64 EBC
+#
+
+[Sources]
+ DevicePathUtilities.c
+ DevicePathToText.c
+ DevicePathFromText.c
+ UefiDevicePathLibMandatoryDevicePathProtocol.c
+ UefiDevicePathLib.h
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+
+[LibraryClasses]
+ BaseLib
+ UefiBootServicesTableLib
+ MemoryAllocationLib
+ DebugLib
+ BaseMemoryLib
+ PcdLib
+ PrintLib
+
+[Guids]
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiVTUTF8Guid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiVT100Guid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiVT100PlusGuid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiPcAnsiGuid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiUartDevicePathGuid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiSasDevicePathGuid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiVirtualDiskGuid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiVirtualCdGuid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiPersistentVirtualDiskGuid
+ ## SOMETIMES_CONSUMES ## GUID
+ gEfiPersistentVirtualCdGuid
+
+[Protocols]
+ gEfiDevicePathProtocolGuid ## SOMETIMES_CONSUMES
+ gEfiDevicePathUtilitiesProtocolGuid ## CONSUMES
+ gEfiDevicePathToTextProtocolGuid ## SOMETIMES_CONSUMES
+ gEfiDevicePathFromTextProtocolGuid ## SOMETIMES_CONSUMES
+ gEfiDebugPortProtocolGuid ## UNDEFINED
+
+[Pcd]
+ gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount ## SOMETIMES_CONSUMES
+
+[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER, Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
+ gEfiDevicePathUtilitiesProtocolGuid AND
+ gEfiDevicePathToTextProtocolGuid AND
+ gEfiDevicePathFromTextProtocolGuid
+
diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.uni b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.uni
new file mode 100644
index 0000000000..070f0add9f
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.uni
@@ -0,0 +1,18 @@
+// /** @file
+// Instance of Device Path Library based on Device Path Protocol.
+//
+// Device Path Library that layers on top of the UEFI 2.0 Device Path Protocol.
+// If the DevicePathFromText/DevicePathToText protocol doesn't exist, the library
+// uses its internal conversion logic.
+//
+// Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT #language en-US "Instance of Device Path Library based on Device Path Protocol."
+
+#string STR_MODULE_DESCRIPTION #language en-US "Instance of Device Path Library based on Device Path Protocol."
+
diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.c b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.c
index 106ff245cc..68b4abfa2d 100644
--- a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.c
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.c
@@ -8,7 +8,7 @@
environment varibles. Multi-instance device paths should never be placed
on a Handle.
- Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2013 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -21,8 +21,7 @@ GLOBAL_REMOVE_IF_UNREFERENCED EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *mDevicePathLib
GLOBAL_REMOVE_IF_UNREFERENCED EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *mDevicePathLibDevicePathFromText = NULL;
/**
- The constructor function caches the pointer to DevicePathUtilites protocol,
- DevicePathToText protocol and DevicePathFromText protocol.
+ The constructor function caches the pointer to DevicePathUtilites protocol.
The constructor function locates these three protocols from protocol database.
It will caches the pointer to local protocol instance if that operation fails
@@ -48,8 +47,6 @@ UefiDevicePathLibOptionalDevicePathProtocolConstructor (
NULL,
(VOID**) &mDevicePathLibDevicePathUtilities
);
- ASSERT_EFI_ERROR (Status);
- ASSERT (mDevicePathLibDevicePathUtilities != NULL);
return Status;
}
diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf
index e812e3e1d4..d194300bde 100644
--- a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf
@@ -5,7 +5,7 @@
# If the DevicePathFromText/DevicePathToText protocol doesn't exist, the library
# uses its internal conversion logic.
#
-# Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2013 - 2019, Intel Corporation. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -79,6 +79,3 @@
[Pcd]
gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount ## SOMETIMES_CONSUMES
-[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER, Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
- gEfiDevicePathUtilitiesProtocolGuid
-
--
2.21.0.windows.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/2] MdePkg/dsc: Add UefiDevicePathLibMandatoryDevicePathProtocol for build
2019-11-28 2:15 [PATCH 0/2] MdePkg/UefiDevicePathLib: Separate the lib instances Gao, Zhichao
2019-11-28 2:15 ` [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path lib Gao, Zhichao
@ 2019-11-28 2:15 ` Gao, Zhichao
1 sibling, 0 replies; 5+ messages in thread
From: Gao, Zhichao @ 2019-11-28 2:15 UTC (permalink / raw)
To: devel; +Cc: Michael D Kinney, Liming Gao, Vitaly Cheptsov
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2298
Add the new instance lib for build.
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Vitaly Cheptsov <vit9696@protonmail.com>
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
---
MdePkg/MdePkg.dsc | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
index 0aeafaaacc..9e9813dd27 100644
--- a/MdePkg/MdePkg.dsc
+++ b/MdePkg/MdePkg.dsc
@@ -1,7 +1,7 @@
## @file
# EFI/PI MdePkg Package
#
-# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2007 - 2019, Intel Corporation. All rights reserved.<BR>
# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -99,6 +99,7 @@
MdePkg/Library/UefiDebugLibStdErr/UefiDebugLibStdErr.inf
MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf
+ MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePathProtocol.inf
MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLibDevicePathProtocol.inf
MdePkg/Library/UefiDriverEntryPoint/UefiDriverEntryPoint.inf
MdePkg/Library/UefiLib/UefiLib.inf
--
2.21.0.windows.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path lib
2019-11-28 2:15 ` [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path lib Gao, Zhichao
@ 2019-12-10 1:04 ` Liming Gao
2019-12-10 10:14 ` Gao, Zhichao
0 siblings, 1 reply; 5+ messages in thread
From: Liming Gao @ 2019-12-10 1:04 UTC (permalink / raw)
To: Gao, Zhichao, devel@edk2.groups.io
Cc: Kinney, Michael D, Vitaly Cheptsov, Gao, Liming
Zhichao:
The change is good. New library instance is benefit for image size.
But, please make sure library constructor always return success. Otherwise, error status will assert in autogen code.
Thanks
Liming
>-----Original Message-----
>From: Gao, Zhichao
>Sent: Thursday, November 28, 2019 10:15 AM
>To: devel@edk2.groups.io
>Cc: Kinney, Michael D <michael.d.kinney@intel.com>; Gao, Liming
><liming.gao@intel.com>; Vitaly Cheptsov <vit9696@protonmail.com>
>Subject: [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path lib
>
>REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2298
>
>UefiDevicePathLibOptionalDevicePathProtocol's implementation isn't
>fit its description. It should be implement as blow:
>Try to find the DevicePathProtocol, if found then use it to implement
>the interface. Else, use the local interface. It should not have the
>depex and ASSERT of gEfiDevicePathUtilitiesProtocolGuid when not find
>the DevicePathProtocol.
>
>Add a mandatory one to force using the DevicePathUtilities,
>DevicePathToText and DevicePathFromText protocol.
>
>Cc: Michael D Kinney <michael.d.kinney@intel.com>
>Cc: Liming Gao <liming.gao@intel.com>
>Cc: Vitaly Cheptsov <vit9696@protonmail.com>
>Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
>---
> ...DevicePathLibMandatoryDevicePathProtocol.c | 469
>++++++++++++++++++
> ...vicePathLibMandatoryDevicePathProtocol.inf | 86 ++++
> ...vicePathLibMandatoryDevicePathProtocol.uni | 18 +
> ...iDevicePathLibOptionalDevicePathProtocol.c | 7 +-
> ...evicePathLibOptionalDevicePathProtocol.inf | 5 +-
> 5 files changed, 576 insertions(+), 9 deletions(-)
> create mode 100644
>MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePath
>Protocol.c
> create mode 100644
>MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePath
>Protocol.inf
> create mode 100644
>MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePath
>Protocol.uni
>
>diff --git
>a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
>hProtocol.c
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
>thProtocol.c
>new file mode 100644
>index 0000000000..fa27110fd4
>--- /dev/null
>+++
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
>thProtocol.c
>@@ -0,0 +1,469 @@
>+/** @file
>+ Device Path services. The thing to remember is device paths are built out of
>+ nodes. The device path is terminated by an end node that is length
>+ sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is
>sizeof(EFI_DEVICE_PATH_PROTOCOL)
>+ all over this file.
>+
>+ The only place where multi-instance device paths are supported is in
>+ environment varibles. Multi-instance device paths should never be placed
>+ on a Handle.
>+
>+ Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
>+ SPDX-License-Identifier: BSD-2-Clause-Patent
>+
>+**/
>+
>+
>+#include "UefiDevicePathLib.h"
>+
>+GLOBAL_REMOVE_IF_UNREFERENCED
>EFI_DEVICE_PATH_UTILITIES_PROTOCOL *mDevicePathLibDevicePathUtilities
>= NULL;
>+GLOBAL_REMOVE_IF_UNREFERENCED
>EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *mDevicePathLibDevicePathToText
>= NULL;
>+GLOBAL_REMOVE_IF_UNREFERENCED
>EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL
>*mDevicePathLibDevicePathFromText = NULL;
>+
>+/**
>+ The constructor function caches the pointer to DevicePathUtilites protocol,
>+ DevicePathToText protocol and DevicePathFromText protocol.
>+
>+ The constructor function locates these three protocols from protocol
>database.
>+ It will caches the pointer to local protocol instance if that operation fails
>+ and it will always return EFI_SUCCESS.
>+
>+ @param ImageHandle The firmware allocated handle for the EFI image.
>+ @param SystemTable A pointer to the EFI System Table.
>+
>+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
>+
>+**/
>+EFI_STATUS
>+EFIAPI
>+UefiDevicePathLibMandatoryDevicePathProtocolConstructor (
>+ IN EFI_HANDLE ImageHandle,
>+ IN EFI_SYSTEM_TABLE *SystemTable
>+ )
>+{
>+ EFI_STATUS Status;
>+
>+ Status = gBS->LocateProtocol (
>+ &gEfiDevicePathUtilitiesProtocolGuid,
>+ NULL,
>+ (VOID**) &mDevicePathLibDevicePathUtilities
>+ );
>+ ASSERT_EFI_ERROR (Status);
>+ ASSERT (mDevicePathLibDevicePathUtilities != NULL);
>+
>+ Status = gBS->LocateProtocol (
>+ &gEfiDevicePathToTextProtocolGuid,
>+ NULL,
>+ (VOID**) &mDevicePathLibDevicePathToText
>+ );
>+ ASSERT_EFI_ERROR (Status);
>+ ASSERT (mDevicePathLibDevicePathToText != NULL);
>+
>+ Status = gBS->LocateProtocol (
>+ &gEfiDevicePathFromTextProtocolGuid,
>+ NULL,
>+ (VOID**) &mDevicePathLibDevicePathFromText
>+ );
>+ ASSERT_EFI_ERROR (Status);
>+ ASSERT (mDevicePathLibDevicePathFromText != NULL);
>+
>+ return Status;
>+}
>+
>+/**
>+ Returns the size of a device path in bytes.
>+
>+ This function returns the size, in bytes, of the device path data structure
>+ specified by DevicePath including the end of device path node.
>+ If DevicePath is NULL or invalid, then 0 is returned.
>+
>+ @param DevicePath A pointer to a device path data structure.
>+
>+ @retval 0 If DevicePath is NULL or invalid.
>+ @retval Others The size of a device path in bytes.
>+
>+**/
>+UINTN
>+EFIAPI
>+GetDevicePathSize (
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
>+ )
>+{
>+ if (mDevicePathLibDevicePathUtilities != NULL) {
>+ return mDevicePathLibDevicePathUtilities->GetDevicePathSize
>(DevicePath);
>+ }
>+
>+ ASSERT (FALSE);
>+ return 0;
>+}
>+
>+/**
>+ Creates a new copy of an existing device path.
>+
>+ This function allocates space for a new copy of the device path specified by
>DevicePath.
>+ If DevicePath is NULL, then NULL is returned. If the memory is successfully
>+ allocated, then the contents of DevicePath are copied to the newly
>allocated
>+ buffer, and a pointer to that buffer is returned. Otherwise, NULL is
>returned.
>+ The memory for the new device path is allocated from EFI boot services
>memory.
>+ It is the responsibility of the caller to free the memory allocated.
>+
>+ @param DevicePath A pointer to a device path data structure.
>+
>+ @retval NULL DevicePath is NULL or invalid.
>+ @retval Others A pointer to the duplicated device path.
>+
>+**/
>+EFI_DEVICE_PATH_PROTOCOL *
>+EFIAPI
>+DuplicateDevicePath (
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
>+ )
>+{
>+ if (mDevicePathLibDevicePathUtilities != NULL) {
>+ return mDevicePathLibDevicePathUtilities->DuplicateDevicePath
>(DevicePath);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Creates a new device path by appending a second device path to a first
>device path.
>+
>+ This function creates a new device path by appending a copy of
>SecondDevicePath
>+ to a copy of FirstDevicePath in a newly allocated buffer. Only the end-of-
>device-path
>+ device node from SecondDevicePath is retained. The newly created device
>path is
>+ returned. If FirstDevicePath is NULL, then it is ignored, and a duplicate of
>+ SecondDevicePath is returned. If SecondDevicePath is NULL, then it is
>ignored,
>+ and a duplicate of FirstDevicePath is returned. If both FirstDevicePath and
>+ SecondDevicePath are NULL, then a copy of an end-of-device-path is
>returned.
>+
>+ If there is not enough memory for the newly allocated buffer, then NULL is
>returned.
>+ The memory for the new device path is allocated from EFI boot services
>memory.
>+ It is the responsibility of the caller to free the memory allocated.
>+
>+ @param FirstDevicePath A pointer to a device path data structure.
>+ @param SecondDevicePath A pointer to a device path data structure.
>+
>+ @retval NULL If there is not enough memory for the newly allocated
>buffer.
>+ @retval NULL If FirstDevicePath or SecondDevicePath is invalid.
>+ @retval Others A pointer to the new device path if success.
>+ Or a copy an end-of-device-path if both FirstDevicePath and
>SecondDevicePath are NULL.
>+
>+**/
>+EFI_DEVICE_PATH_PROTOCOL *
>+EFIAPI
>+AppendDevicePath (
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *FirstDevicePath, OPTIONAL
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath OPTIONAL
>+ )
>+{
>+ if (mDevicePathLibDevicePathUtilities != NULL) {
>+ return mDevicePathLibDevicePathUtilities->AppendDevicePath
>(FirstDevicePath, SecondDevicePath);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Creates a new path by appending the device node to the device path.
>+
>+ This function creates a new device path by appending a copy of the device
>node
>+ specified by DevicePathNode to a copy of the device path specified by
>DevicePath
>+ in an allocated buffer. The end-of-device-path device node is moved after
>the
>+ end of the appended device node.
>+ If DevicePathNode is NULL then a copy of DevicePath is returned.
>+ If DevicePath is NULL then a copy of DevicePathNode, followed by an end-
>of-device
>+ path device node is returned.
>+ If both DevicePathNode and DevicePath are NULL then a copy of an end-of-
>device-path
>+ device node is returned.
>+ If there is not enough memory to allocate space for the new device path,
>then
>+ NULL is returned.
>+ The memory is allocated from EFI boot services memory. It is the
>responsibility
>+ of the caller to free the memory allocated.
>+
>+ @param DevicePath A pointer to a device path data structure.
>+ @param DevicePathNode A pointer to a single device path node.
>+
>+ @retval NULL If there is not enough memory for the new device path.
>+ @retval Others A pointer to the new device path if success.
>+ A copy of DevicePathNode followed by an end-of-device-path
>node
>+ if both FirstDevicePath and SecondDevicePath are NULL.
>+ A copy of an end-of-device-path node if both FirstDevicePath
>+ and SecondDevicePath are NULL.
>+
>+**/
>+EFI_DEVICE_PATH_PROTOCOL *
>+EFIAPI
>+AppendDevicePathNode (
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathNode OPTIONAL
>+ )
>+{
>+ if (mDevicePathLibDevicePathUtilities != NULL) {
>+ return mDevicePathLibDevicePathUtilities->AppendDeviceNode
>(DevicePath, DevicePathNode);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Creates a new device path by appending the specified device path instance
>to the specified device
>+ path.
>+
>+ This function creates a new device path by appending a copy of the device
>path
>+ instance specified by DevicePathInstance to a copy of the device path
>specified
>+ by DevicePath in a allocated buffer.
>+ The end-of-device-path device node is moved after the end of the
>appended device
>+ path instance and a new end-of-device-path-instance node is inserted
>between.
>+ If DevicePath is NULL, then a copy if DevicePathInstance is returned.
>+ If DevicePathInstance is NULL, then NULL is returned.
>+ If DevicePath or DevicePathInstance is invalid, then NULL is returned.
>+ If there is not enough memory to allocate space for the new device path,
>then
>+ NULL is returned.
>+ The memory is allocated from EFI boot services memory. It is the
>responsibility
>+ of the caller to free the memory allocated.
>+
>+ @param DevicePath A pointer to a device path data structure.
>+ @param DevicePathInstance A pointer to a device path instance.
>+
>+ @return A pointer to the new device path.
>+
>+**/
>+EFI_DEVICE_PATH_PROTOCOL *
>+EFIAPI
>+AppendDevicePathInstance (
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance OPTIONAL
>+ )
>+{
>+ if (mDevicePathLibDevicePathUtilities != NULL) {
>+ return mDevicePathLibDevicePathUtilities->AppendDevicePathInstance
>(DevicePath, DevicePathInstance);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Creates a copy of the current device path instance and returns a pointer to
>the next device path
>+ instance.
>+
>+ This function creates a copy of the current device path instance. It also
>updates
>+ DevicePath to point to the next device path instance in the device path (or
>NULL
>+ if no more) and updates Size to hold the size of the device path instance
>copy.
>+ If DevicePath is NULL, then NULL is returned.
>+ If DevicePath points to a invalid device path, then NULL is returned.
>+ If there is not enough memory to allocate space for the new device path,
>then
>+ NULL is returned.
>+ The memory is allocated from EFI boot services memory. It is the
>responsibility
>+ of the caller to free the memory allocated.
>+ If Size is NULL, then ASSERT().
>+
>+ @param DevicePath On input, this holds the pointer to the current
>+ device path instance. On output, this holds
>+ the pointer to the next device path instance
>+ or NULL if there are no more device path
>+ instances in the device path pointer to a
>+ device path data structure.
>+ @param Size On output, this holds the size of the device
>+ path instance, in bytes or zero, if DevicePath
>+ is NULL.
>+
>+ @return A pointer to the current device path instance.
>+
>+**/
>+EFI_DEVICE_PATH_PROTOCOL *
>+EFIAPI
>+GetNextDevicePathInstance (
>+ IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath,
>+ OUT UINTN *Size
>+ )
>+{
>+ if (mDevicePathLibDevicePathUtilities != NULL) {
>+ return mDevicePathLibDevicePathUtilities->GetNextDevicePathInstance
>(DevicePath, Size);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Creates a device node.
>+
>+ This function creates a new device node in a newly allocated buffer of size
>+ NodeLength and initializes the device path node header with NodeType
>and NodeSubType.
>+ The new device path node is returned.
>+ If NodeLength is smaller than a device path header, then NULL is returned.
>+ If there is not enough memory to allocate space for the new device path,
>then
>+ NULL is returned.
>+ The memory is allocated from EFI boot services memory. It is the
>responsibility
>+ of the caller to free the memory allocated.
>+
>+ @param NodeType The device node type for the new device
>node.
>+ @param NodeSubType The device node sub-type for the new
>device node.
>+ @param NodeLength The length of the new device node.
>+
>+ @return The new device path.
>+
>+**/
>+EFI_DEVICE_PATH_PROTOCOL *
>+EFIAPI
>+CreateDeviceNode (
>+ IN UINT8 NodeType,
>+ IN UINT8 NodeSubType,
>+ IN UINT16 NodeLength
>+ )
>+{
>+ if (mDevicePathLibDevicePathUtilities != NULL) {
>+ return mDevicePathLibDevicePathUtilities->CreateDeviceNode (NodeType,
>NodeSubType, NodeLength);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Determines if a device path is single or multi-instance.
>+
>+ This function returns TRUE if the device path specified by DevicePath is
>+ multi-instance.
>+ Otherwise, FALSE is returned.
>+ If DevicePath is NULL or invalid, then FALSE is returned.
>+
>+ @param DevicePath A pointer to a device path data structure.
>+
>+ @retval TRUE DevicePath is multi-instance.
>+ @retval FALSE DevicePath is not multi-instance, or DevicePath
>+ is NULL or invalid.
>+
>+**/
>+BOOLEAN
>+EFIAPI
>+IsDevicePathMultiInstance (
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
>+ )
>+{
>+ if (mDevicePathLibDevicePathUtilities != NULL) {
>+ return mDevicePathLibDevicePathUtilities->IsDevicePathMultiInstance
>(DevicePath);
>+ }
>+
>+ ASSERT (FALSE);
>+ return FALSE;
>+}
>+
>+/**
>+ Converts a device node to its string representation.
>+
>+ @param DeviceNode A Pointer to the device node to be converted.
>+ @param DisplayOnly If DisplayOnly is TRUE, then the shorter text
>representation
>+ of the display node is used, where applicable. If DisplayOnly
>+ is FALSE, then the longer text representation of the display
>node
>+ is used.
>+ @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut
>forms of text
>+ representation for a device node can be used, where
>applicable.
>+
>+ @return A pointer to the allocated text representation of the device node
>or NULL if DeviceNode
>+ is NULL or there was insufficient memory.
>+
>+**/
>+CHAR16 *
>+EFIAPI
>+ConvertDeviceNodeToText (
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode,
>+ IN BOOLEAN DisplayOnly,
>+ IN BOOLEAN AllowShortcuts
>+ )
>+{
>+ if (mDevicePathLibDevicePathToText != NULL) {
>+ return mDevicePathLibDevicePathToText->ConvertDeviceNodeToText
>(DeviceNode, DisplayOnly, AllowShortcuts);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Converts a device path to its text representation.
>+
>+ @param DevicePath A Pointer to the device to be converted.
>+ @param DisplayOnly If DisplayOnly is TRUE, then the shorter text
>representation
>+ of the display node is used, where applicable. If DisplayOnly
>+ is FALSE, then the longer text representation of the display node
>+ is used.
>+ @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut forms
>of text
>+ representation for a device node can be used, where applicable.
>+
>+ @return A pointer to the allocated text representation of the device path
>or
>+ NULL if DeviceNode is NULL or there was insufficient memory.
>+
>+**/
>+CHAR16 *
>+EFIAPI
>+ConvertDevicePathToText (
>+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
>+ IN BOOLEAN DisplayOnly,
>+ IN BOOLEAN AllowShortcuts
>+ )
>+{
>+ if (mDevicePathLibDevicePathToText != NULL) {
>+ return mDevicePathLibDevicePathToText->ConvertDevicePathToText
>(DevicePath, DisplayOnly, AllowShortcuts);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Convert text to the binary representation of a device node.
>+
>+ @param TextDeviceNode TextDeviceNode points to the text
>representation of a device
>+ node. Conversion starts with the first character and continues
>+ until the first non-device node character.
>+
>+ @return A pointer to the EFI device node or NULL if TextDeviceNode is
>NULL or there was
>+ insufficient memory or text unsupported.
>+
>+**/
>+EFI_DEVICE_PATH_PROTOCOL *
>+EFIAPI
>+ConvertTextToDeviceNode (
>+ IN CONST CHAR16 *TextDeviceNode
>+ )
>+{
>+ if (mDevicePathLibDevicePathFromText != NULL) {
>+ return mDevicePathLibDevicePathFromText->ConvertTextToDeviceNode
>(TextDeviceNode);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>+/**
>+ Convert text to the binary representation of a device path.
>+
>+
>+ @param TextDevicePath TextDevicePath points to the text representation
>of a device
>+ path. Conversion starts with the first character and continues
>+ until the first non-device node character.
>+
>+ @return A pointer to the allocated device path or NULL if TextDeviceNode
>is NULL or
>+ there was insufficient memory.
>+
>+**/
>+EFI_DEVICE_PATH_PROTOCOL *
>+EFIAPI
>+ConvertTextToDevicePath (
>+ IN CONST CHAR16 *TextDevicePath
>+ )
>+{
>+ if (mDevicePathLibDevicePathFromText != NULL) {
>+ return mDevicePathLibDevicePathFromText->ConvertTextToDevicePath
>(TextDevicePath);
>+ }
>+
>+ ASSERT (FALSE);
>+ return NULL;
>+}
>+
>diff --git
>a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
>hProtocol.inf
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
>thProtocol.inf
>new file mode 100644
>index 0000000000..eb545d4601
>--- /dev/null
>+++
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
>thProtocol.inf
>@@ -0,0 +1,86 @@
>+## @file
>+# Instance of Device Path Library based on Device Path Protocol.
>+#
>+# Device Path Library that layers on top of the UEFI 2.0 Device Path Protocol.
>+# If the DevicePathFromText/DevicePathToText protocol doesn't exist, the
>library
>+# uses its internal conversion logic.
>+#
>+# Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
>+#
>+# SPDX-License-Identifier: BSD-2-Clause-Patent
>+#
>+#
>+##
>+
>+[Defines]
>+ INF_VERSION = 0x00010005
>+ BASE_NAME = UefiDevicePathLibMandatoryDevicePathProtocol
>+ MODULE_UNI_FILE =
>UefiDevicePathLibMandatoryDevicePathProtocol.uni
>+ FILE_GUID = 5A8389AF-DAE4-407E-8FD5-D026948BC579
>+ MODULE_TYPE = UEFI_DRIVER
>+ VERSION_STRING = 1.0
>+ LIBRARY_CLASS = DevicePathLib|DXE_DRIVER
>DXE_RUNTIME_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER
>SMM_CORE
>+
>+ CONSTRUCTOR =
>UefiDevicePathLibMandatoryDevicePathProtocolConstructor
>+
>+#
>+# VALID_ARCHITECTURES = IA32 X64 EBC
>+#
>+
>+[Sources]
>+ DevicePathUtilities.c
>+ DevicePathToText.c
>+ DevicePathFromText.c
>+ UefiDevicePathLibMandatoryDevicePathProtocol.c
>+ UefiDevicePathLib.h
>+
>+[Packages]
>+ MdePkg/MdePkg.dec
>+
>+
>+[LibraryClasses]
>+ BaseLib
>+ UefiBootServicesTableLib
>+ MemoryAllocationLib
>+ DebugLib
>+ BaseMemoryLib
>+ PcdLib
>+ PrintLib
>+
>+[Guids]
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiVTUTF8Guid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiVT100Guid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiVT100PlusGuid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiPcAnsiGuid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiUartDevicePathGuid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiSasDevicePathGuid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiVirtualDiskGuid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiVirtualCdGuid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiPersistentVirtualDiskGuid
>+ ## SOMETIMES_CONSUMES ## GUID
>+ gEfiPersistentVirtualCdGuid
>+
>+[Protocols]
>+ gEfiDevicePathProtocolGuid ## SOMETIMES_CONSUMES
>+ gEfiDevicePathUtilitiesProtocolGuid ## CONSUMES
>+ gEfiDevicePathToTextProtocolGuid ## SOMETIMES_CONSUMES
>+ gEfiDevicePathFromTextProtocolGuid ## SOMETIMES_CONSUMES
>+ gEfiDebugPortProtocolGuid ## UNDEFINED
>+
>+[Pcd]
>+ gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount ##
>SOMETIMES_CONSUMES
>+
>+[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER,
>Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
>+ gEfiDevicePathUtilitiesProtocolGuid AND
>+ gEfiDevicePathToTextProtocolGuid AND
>+ gEfiDevicePathFromTextProtocolGuid
>+
>diff --git
>a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
>hProtocol.uni
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
>thProtocol.uni
>new file mode 100644
>index 0000000000..070f0add9f
>--- /dev/null
>+++
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
>thProtocol.uni
>@@ -0,0 +1,18 @@
>+// /** @file
>+// Instance of Device Path Library based on Device Path Protocol.
>+//
>+// Device Path Library that layers on top of the UEFI 2.0 Device Path Protocol.
>+// If the DevicePathFromText/DevicePathToText protocol doesn't exist, the
>library
>+// uses its internal conversion logic.
>+//
>+// Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>
>+//
>+// SPDX-License-Identifier: BSD-2-Clause-Patent
>+//
>+// **/
>+
>+
>+#string STR_MODULE_ABSTRACT #language en-US "Instance of Device
>Path Library based on Device Path Protocol."
>+
>+#string STR_MODULE_DESCRIPTION #language en-US "Instance of
>Device Path Library based on Device Path Protocol."
>+
>diff --git
>a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathP
>rotocol.c
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePath
>Protocol.c
>index 106ff245cc..68b4abfa2d 100644
>---
>a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathP
>rotocol.c
>+++
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePath
>Protocol.c
>@@ -8,7 +8,7 @@
> environment varibles. Multi-instance device paths should never be placed
> on a Handle.
>
>- Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
>+ Copyright (c) 2013 - 2019, Intel Corporation. All rights reserved.<BR>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> **/
>@@ -21,8 +21,7 @@ GLOBAL_REMOVE_IF_UNREFERENCED
>EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *mDevicePathLib
> GLOBAL_REMOVE_IF_UNREFERENCED
>EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL
>*mDevicePathLibDevicePathFromText = NULL;
>
> /**
>- The constructor function caches the pointer to DevicePathUtilites protocol,
>- DevicePathToText protocol and DevicePathFromText protocol.
>+ The constructor function caches the pointer to DevicePathUtilites protocol.
>
> The constructor function locates these three protocols from protocol
>database.
> It will caches the pointer to local protocol instance if that operation fails
>@@ -48,8 +47,6 @@
>UefiDevicePathLibOptionalDevicePathProtocolConstructor (
> NULL,
> (VOID**) &mDevicePathLibDevicePathUtilities
> );
>- ASSERT_EFI_ERROR (Status);
>- ASSERT (mDevicePathLibDevicePathUtilities != NULL);
> return Status;
> }
>
>diff --git
>a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathP
>rotocol.inf
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePath
>Protocol.inf
>index e812e3e1d4..d194300bde 100644
>---
>a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathP
>rotocol.inf
>+++
>b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePath
>Protocol.inf
>@@ -5,7 +5,7 @@
> # If the DevicePathFromText/DevicePathToText protocol doesn't exist, the
>library
> # uses its internal conversion logic.
> #
>-# Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
>+# Copyright (c) 2013 - 2019, Intel Corporation. All rights reserved.<BR>
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent
> #
>@@ -79,6 +79,3 @@
> [Pcd]
> gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount ##
>SOMETIMES_CONSUMES
>
>-[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER,
>Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
>- gEfiDevicePathUtilitiesProtocolGuid
>-
>--
>2.21.0.windows.1
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path lib
2019-12-10 1:04 ` Liming Gao
@ 2019-12-10 10:14 ` Gao, Zhichao
0 siblings, 0 replies; 5+ messages in thread
From: Gao, Zhichao @ 2019-12-10 10:14 UTC (permalink / raw)
To: Gao, Liming, devel@edk2.groups.io; +Cc: Kinney, Michael D, Vitaly Cheptsov
The mandatory one is expected to catch the ASSERT. But the Optional one should return success. I would fix that in the V2 patch set.
Thanks,
Zhichao
> -----Original Message-----
> From: Gao, Liming <liming.gao@intel.com>
> Sent: Tuesday, December 10, 2019 9:04 AM
> To: Gao, Zhichao <zhichao.gao@intel.com>; devel@edk2.groups.io
> Cc: Kinney, Michael D <michael.d.kinney@intel.com>; Vitaly Cheptsov
> <vit9696@protonmail.com>; Gao, Liming <liming.gao@intel.com>
> Subject: RE: [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path
> lib
>
> Zhichao:
> The change is good. New library instance is benefit for image size.
>
> But, please make sure library constructor always return success. Otherwise,
> error status will assert in autogen code.
>
> Thanks
> Liming
> >-----Original Message-----
> >From: Gao, Zhichao
> >Sent: Thursday, November 28, 2019 10:15 AM
> >To: devel@edk2.groups.io
> >Cc: Kinney, Michael D <michael.d.kinney@intel.com>; Gao, Liming
> ><liming.gao@intel.com>; Vitaly Cheptsov <vit9696@protonmail.com>
> >Subject: [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path
> >lib
> >
> >REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2298
> >
> >UefiDevicePathLibOptionalDevicePathProtocol's implementation isn't fit
> >its description. It should be implement as blow:
> >Try to find the DevicePathProtocol, if found then use it to implement
> >the interface. Else, use the local interface. It should not have the
> >depex and ASSERT of gEfiDevicePathUtilitiesProtocolGuid when not find
> >the DevicePathProtocol.
> >
> >Add a mandatory one to force using the DevicePathUtilities,
> >DevicePathToText and DevicePathFromText protocol.
> >
> >Cc: Michael D Kinney <michael.d.kinney@intel.com>
> >Cc: Liming Gao <liming.gao@intel.com>
> >Cc: Vitaly Cheptsov <vit9696@protonmail.com>
> >Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
> >---
> > ...DevicePathLibMandatoryDevicePathProtocol.c | 469
> >++++++++++++++++++
> > ...vicePathLibMandatoryDevicePathProtocol.inf | 86 ++++
> >...vicePathLibMandatoryDevicePathProtocol.uni | 18 +
> > ...iDevicePathLibOptionalDevicePathProtocol.c | 7 +-
> > ...evicePathLibOptionalDevicePathProtocol.inf | 5 +-
> > 5 files changed, 576 insertions(+), 9 deletions(-) create mode 100644
> >MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePath
> >Protocol.c
> > create mode 100644
> >MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePath
> >Protocol.inf
> > create mode 100644
> >MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePath
> >Protocol.uni
> >
> >diff --git
> >a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
> >hProtocol.c
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
> >thProtocol.c
> >new file mode 100644
> >index 0000000000..fa27110fd4
> >--- /dev/null
> >+++
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
> >thProtocol.c
> >@@ -0,0 +1,469 @@
> >+/** @file
> >+ Device Path services. The thing to remember is device paths are
> >+built out of
> >+ nodes. The device path is terminated by an end node that is length
> >+ sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is
> >sizeof(EFI_DEVICE_PATH_PROTOCOL)
> >+ all over this file.
> >+
> >+ The only place where multi-instance device paths are supported is in
> >+ environment varibles. Multi-instance device paths should never be
> >+ placed on a Handle.
> >+
> >+ Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
> >+ SPDX-License-Identifier: BSD-2-Clause-Patent
> >+
> >+**/
> >+
> >+
> >+#include "UefiDevicePathLib.h"
> >+
> >+GLOBAL_REMOVE_IF_UNREFERENCED
> >EFI_DEVICE_PATH_UTILITIES_PROTOCOL *mDevicePathLibDevicePathUtilities
> >= NULL;
> >+GLOBAL_REMOVE_IF_UNREFERENCED
> >EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *mDevicePathLibDevicePathToText
> >= NULL;
> >+GLOBAL_REMOVE_IF_UNREFERENCED
> >EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL
> >*mDevicePathLibDevicePathFromText = NULL;
> >+
> >+/**
> >+ The constructor function caches the pointer to DevicePathUtilites
> >+protocol,
> >+ DevicePathToText protocol and DevicePathFromText protocol.
> >+
> >+ The constructor function locates these three protocols from protocol
> >database.
> >+ It will caches the pointer to local protocol instance if that
> >+ operation fails and it will always return EFI_SUCCESS.
> >+
> >+ @param ImageHandle The firmware allocated handle for the EFI image.
> >+ @param SystemTable A pointer to the EFI System Table.
> >+
> >+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
> >+
> >+**/
> >+EFI_STATUS
> >+EFIAPI
> >+UefiDevicePathLibMandatoryDevicePathProtocolConstructor (
> >+ IN EFI_HANDLE ImageHandle,
> >+ IN EFI_SYSTEM_TABLE *SystemTable
> >+ )
> >+{
> >+ EFI_STATUS Status;
> >+
> >+ Status = gBS->LocateProtocol (
> >+ &gEfiDevicePathUtilitiesProtocolGuid,
> >+ NULL,
> >+ (VOID**) &mDevicePathLibDevicePathUtilities
> >+ );
> >+ ASSERT_EFI_ERROR (Status);
> >+ ASSERT (mDevicePathLibDevicePathUtilities != NULL);
> >+
> >+ Status = gBS->LocateProtocol (
> >+ &gEfiDevicePathToTextProtocolGuid,
> >+ NULL,
> >+ (VOID**) &mDevicePathLibDevicePathToText
> >+ );
> >+ ASSERT_EFI_ERROR (Status);
> >+ ASSERT (mDevicePathLibDevicePathToText != NULL);
> >+
> >+ Status = gBS->LocateProtocol (
> >+ &gEfiDevicePathFromTextProtocolGuid,
> >+ NULL,
> >+ (VOID**) &mDevicePathLibDevicePathFromText
> >+ );
> >+ ASSERT_EFI_ERROR (Status);
> >+ ASSERT (mDevicePathLibDevicePathFromText != NULL);
> >+
> >+ return Status;
> >+}
> >+
> >+/**
> >+ Returns the size of a device path in bytes.
> >+
> >+ This function returns the size, in bytes, of the device path data
> >+ structure specified by DevicePath including the end of device path node.
> >+ If DevicePath is NULL or invalid, then 0 is returned.
> >+
> >+ @param DevicePath A pointer to a device path data structure.
> >+
> >+ @retval 0 If DevicePath is NULL or invalid.
> >+ @retval Others The size of a device path in bytes.
> >+
> >+**/
> >+UINTN
> >+EFIAPI
> >+GetDevicePathSize (
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathUtilities != NULL) {
> >+ return mDevicePathLibDevicePathUtilities->GetDevicePathSize
> >(DevicePath);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return 0;
> >+}
> >+
> >+/**
> >+ Creates a new copy of an existing device path.
> >+
> >+ This function allocates space for a new copy of the device path
> >+ specified by
> >DevicePath.
> >+ If DevicePath is NULL, then NULL is returned. If the memory is
> >+ successfully allocated, then the contents of DevicePath are copied
> >+ to the newly
> >allocated
> >+ buffer, and a pointer to that buffer is returned. Otherwise, NULL
> >+ is
> >returned.
> >+ The memory for the new device path is allocated from EFI boot
> >+ services
> >memory.
> >+ It is the responsibility of the caller to free the memory allocated.
> >+
> >+ @param DevicePath A pointer to a device path data structure.
> >+
> >+ @retval NULL DevicePath is NULL or invalid.
> >+ @retval Others A pointer to the duplicated device path.
> >+
> >+**/
> >+EFI_DEVICE_PATH_PROTOCOL *
> >+EFIAPI
> >+DuplicateDevicePath (
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathUtilities != NULL) {
> >+ return mDevicePathLibDevicePathUtilities->DuplicateDevicePath
> >(DevicePath);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Creates a new device path by appending a second device path to a
> >+first
> >device path.
> >+
> >+ This function creates a new device path by appending a copy of
> >SecondDevicePath
> >+ to a copy of FirstDevicePath in a newly allocated buffer. Only the
> >+ end-of-
> >device-path
> >+ device node from SecondDevicePath is retained. The newly created
> >+ device
> >path is
> >+ returned. If FirstDevicePath is NULL, then it is ignored, and a
> >+ duplicate of SecondDevicePath is returned. If SecondDevicePath is
> >+ NULL, then it is
> >ignored,
> >+ and a duplicate of FirstDevicePath is returned. If both
> >+ FirstDevicePath and SecondDevicePath are NULL, then a copy of an
> >+ end-of-device-path is
> >returned.
> >+
> >+ If there is not enough memory for the newly allocated buffer, then
> >+ NULL is
> >returned.
> >+ The memory for the new device path is allocated from EFI boot
> >+ services
> >memory.
> >+ It is the responsibility of the caller to free the memory allocated.
> >+
> >+ @param FirstDevicePath A pointer to a device path data structure.
> >+ @param SecondDevicePath A pointer to a device path data structure.
> >+
> >+ @retval NULL If there is not enough memory for the newly allocated
> >buffer.
> >+ @retval NULL If FirstDevicePath or SecondDevicePath is invalid.
> >+ @retval Others A pointer to the new device path if success.
> >+ Or a copy an end-of-device-path if both
> >+ FirstDevicePath and
> >SecondDevicePath are NULL.
> >+
> >+**/
> >+EFI_DEVICE_PATH_PROTOCOL *
> >+EFIAPI
> >+AppendDevicePath (
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *FirstDevicePath, OPTIONAL
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *SecondDevicePath OPTIONAL
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathUtilities != NULL) {
> >+ return mDevicePathLibDevicePathUtilities->AppendDevicePath
> >(FirstDevicePath, SecondDevicePath);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Creates a new path by appending the device node to the device path.
> >+
> >+ This function creates a new device path by appending a copy of the
> >+ device
> >node
> >+ specified by DevicePathNode to a copy of the device path specified
> >+ by
> >DevicePath
> >+ in an allocated buffer. The end-of-device-path device node is moved
> >+ after
> >the
> >+ end of the appended device node.
> >+ If DevicePathNode is NULL then a copy of DevicePath is returned.
> >+ If DevicePath is NULL then a copy of DevicePathNode, followed by an
> >+ end-
> >of-device
> >+ path device node is returned.
> >+ If both DevicePathNode and DevicePath are NULL then a copy of an
> >+ end-of-
> >device-path
> >+ device node is returned.
> >+ If there is not enough memory to allocate space for the new device
> >+ path,
> >then
> >+ NULL is returned.
> >+ The memory is allocated from EFI boot services memory. It is the
> >responsibility
> >+ of the caller to free the memory allocated.
> >+
> >+ @param DevicePath A pointer to a device path data structure.
> >+ @param DevicePathNode A pointer to a single device path node.
> >+
> >+ @retval NULL If there is not enough memory for the new device path.
> >+ @retval Others A pointer to the new device path if success.
> >+ A copy of DevicePathNode followed by an
> >+ end-of-device-path
> >node
> >+ if both FirstDevicePath and SecondDevicePath are NULL.
> >+ A copy of an end-of-device-path node if both FirstDevicePath
> >+ and SecondDevicePath are NULL.
> >+
> >+**/
> >+EFI_DEVICE_PATH_PROTOCOL *
> >+EFIAPI
> >+AppendDevicePathNode (
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathNode OPTIONAL
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathUtilities != NULL) {
> >+ return mDevicePathLibDevicePathUtilities->AppendDeviceNode
> >(DevicePath, DevicePathNode);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Creates a new device path by appending the specified device path
> >+instance
> >to the specified device
> >+ path.
> >+
> >+ This function creates a new device path by appending a copy of the
> >+ device
> >path
> >+ instance specified by DevicePathInstance to a copy of the device
> >+ path
> >specified
> >+ by DevicePath in a allocated buffer.
> >+ The end-of-device-path device node is moved after the end of the
> >appended device
> >+ path instance and a new end-of-device-path-instance node is inserted
> >between.
> >+ If DevicePath is NULL, then a copy if DevicePathInstance is returned.
> >+ If DevicePathInstance is NULL, then NULL is returned.
> >+ If DevicePath or DevicePathInstance is invalid, then NULL is returned.
> >+ If there is not enough memory to allocate space for the new device
> >+ path,
> >then
> >+ NULL is returned.
> >+ The memory is allocated from EFI boot services memory. It is the
> >responsibility
> >+ of the caller to free the memory allocated.
> >+
> >+ @param DevicePath A pointer to a device path data structure.
> >+ @param DevicePathInstance A pointer to a device path instance.
> >+
> >+ @return A pointer to the new device path.
> >+
> >+**/
> >+EFI_DEVICE_PATH_PROTOCOL *
> >+EFIAPI
> >+AppendDevicePathInstance (
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath, OPTIONAL
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance OPTIONAL
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathUtilities != NULL) {
> >+ return mDevicePathLibDevicePathUtilities->AppendDevicePathInstance
> >(DevicePath, DevicePathInstance);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Creates a copy of the current device path instance and returns a
> >+pointer to
> >the next device path
> >+ instance.
> >+
> >+ This function creates a copy of the current device path instance. It
> >+ also
> >updates
> >+ DevicePath to point to the next device path instance in the device
> >+ path (or
> >NULL
> >+ if no more) and updates Size to hold the size of the device path
> >+ instance
> >copy.
> >+ If DevicePath is NULL, then NULL is returned.
> >+ If DevicePath points to a invalid device path, then NULL is returned.
> >+ If there is not enough memory to allocate space for the new device
> >+ path,
> >then
> >+ NULL is returned.
> >+ The memory is allocated from EFI boot services memory. It is the
> >responsibility
> >+ of the caller to free the memory allocated.
> >+ If Size is NULL, then ASSERT().
> >+
> >+ @param DevicePath On input, this holds the pointer to the current
> >+ device path instance. On output, this holds
> >+ the pointer to the next device path instance
> >+ or NULL if there are no more device path
> >+ instances in the device path pointer to a
> >+ device path data structure.
> >+ @param Size On output, this holds the size of the device
> >+ path instance, in bytes or zero, if DevicePath
> >+ is NULL.
> >+
> >+ @return A pointer to the current device path instance.
> >+
> >+**/
> >+EFI_DEVICE_PATH_PROTOCOL *
> >+EFIAPI
> >+GetNextDevicePathInstance (
> >+ IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath,
> >+ OUT UINTN *Size
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathUtilities != NULL) {
> >+ return
> >+mDevicePathLibDevicePathUtilities->GetNextDevicePathInstance
> >(DevicePath, Size);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Creates a device node.
> >+
> >+ This function creates a new device node in a newly allocated buffer
> >+ of size NodeLength and initializes the device path node header with
> >+ NodeType
> >and NodeSubType.
> >+ The new device path node is returned.
> >+ If NodeLength is smaller than a device path header, then NULL is returned.
> >+ If there is not enough memory to allocate space for the new device
> >+ path,
> >then
> >+ NULL is returned.
> >+ The memory is allocated from EFI boot services memory. It is the
> >responsibility
> >+ of the caller to free the memory allocated.
> >+
> >+ @param NodeType The device node type for the new device
> >node.
> >+ @param NodeSubType The device node sub-type for the new
> >device node.
> >+ @param NodeLength The length of the new device node.
> >+
> >+ @return The new device path.
> >+
> >+**/
> >+EFI_DEVICE_PATH_PROTOCOL *
> >+EFIAPI
> >+CreateDeviceNode (
> >+ IN UINT8 NodeType,
> >+ IN UINT8 NodeSubType,
> >+ IN UINT16 NodeLength
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathUtilities != NULL) {
> >+ return mDevicePathLibDevicePathUtilities->CreateDeviceNode
> >+(NodeType,
> >NodeSubType, NodeLength);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Determines if a device path is single or multi-instance.
> >+
> >+ This function returns TRUE if the device path specified by
> >+ DevicePath is multi-instance.
> >+ Otherwise, FALSE is returned.
> >+ If DevicePath is NULL or invalid, then FALSE is returned.
> >+
> >+ @param DevicePath A pointer to a device path data structure.
> >+
> >+ @retval TRUE DevicePath is multi-instance.
> >+ @retval FALSE DevicePath is not multi-instance, or DevicePath
> >+ is NULL or invalid.
> >+
> >+**/
> >+BOOLEAN
> >+EFIAPI
> >+IsDevicePathMultiInstance (
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathUtilities != NULL) {
> >+ return
> >+mDevicePathLibDevicePathUtilities->IsDevicePathMultiInstance
> >(DevicePath);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return FALSE;
> >+}
> >+
> >+/**
> >+ Converts a device node to its string representation.
> >+
> >+ @param DeviceNode A Pointer to the device node to be converted.
> >+ @param DisplayOnly If DisplayOnly is TRUE, then the shorter text
> >representation
> >+ of the display node is used, where applicable. If DisplayOnly
> >+ is FALSE, then the longer text
> >+ representation of the display
> >node
> >+ is used.
> >+ @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut
> >forms of text
> >+ representation for a device node can be
> >+ used, where
> >applicable.
> >+
> >+ @return A pointer to the allocated text representation of the device
> >+ node
> >or NULL if DeviceNode
> >+ is NULL or there was insufficient memory.
> >+
> >+**/
> >+CHAR16 *
> >+EFIAPI
> >+ConvertDeviceNodeToText (
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DeviceNode,
> >+ IN BOOLEAN DisplayOnly,
> >+ IN BOOLEAN AllowShortcuts
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathToText != NULL) {
> >+ return mDevicePathLibDevicePathToText->ConvertDeviceNodeToText
> >(DeviceNode, DisplayOnly, AllowShortcuts);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Converts a device path to its text representation.
> >+
> >+ @param DevicePath A Pointer to the device to be converted.
> >+ @param DisplayOnly If DisplayOnly is TRUE, then the shorter text
> >representation
> >+ of the display node is used, where applicable. If DisplayOnly
> >+ is FALSE, then the longer text representation of the display node
> >+ is used.
> >+ @param AllowShortcuts If AllowShortcuts is TRUE, then the shortcut
> >+ forms
> >of text
> >+ representation for a device node can be used, where applicable.
> >+
> >+ @return A pointer to the allocated text representation of the device
> >+ path
> >or
> >+ NULL if DeviceNode is NULL or there was insufficient memory.
> >+
> >+**/
> >+CHAR16 *
> >+EFIAPI
> >+ConvertDevicePathToText (
> >+ IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
> >+ IN BOOLEAN DisplayOnly,
> >+ IN BOOLEAN AllowShortcuts
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathToText != NULL) {
> >+ return mDevicePathLibDevicePathToText->ConvertDevicePathToText
> >(DevicePath, DisplayOnly, AllowShortcuts);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Convert text to the binary representation of a device node.
> >+
> >+ @param TextDeviceNode TextDeviceNode points to the text
> >representation of a device
> >+ node. Conversion starts with the first character and continues
> >+ until the first non-device node character.
> >+
> >+ @return A pointer to the EFI device node or NULL if TextDeviceNode
> >+ is
> >NULL or there was
> >+ insufficient memory or text unsupported.
> >+
> >+**/
> >+EFI_DEVICE_PATH_PROTOCOL *
> >+EFIAPI
> >+ConvertTextToDeviceNode (
> >+ IN CONST CHAR16 *TextDeviceNode
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathFromText != NULL) {
> >+ return mDevicePathLibDevicePathFromText->ConvertTextToDeviceNode
> >(TextDeviceNode);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >+/**
> >+ Convert text to the binary representation of a device path.
> >+
> >+
> >+ @param TextDevicePath TextDevicePath points to the text
> >+ representation
> >of a device
> >+ path. Conversion starts with the first character and continues
> >+ until the first non-device node character.
> >+
> >+ @return A pointer to the allocated device path or NULL if
> >+ TextDeviceNode
> >is NULL or
> >+ there was insufficient memory.
> >+
> >+**/
> >+EFI_DEVICE_PATH_PROTOCOL *
> >+EFIAPI
> >+ConvertTextToDevicePath (
> >+ IN CONST CHAR16 *TextDevicePath
> >+ )
> >+{
> >+ if (mDevicePathLibDevicePathFromText != NULL) {
> >+ return mDevicePathLibDevicePathFromText->ConvertTextToDevicePath
> >(TextDevicePath);
> >+ }
> >+
> >+ ASSERT (FALSE);
> >+ return NULL;
> >+}
> >+
> >diff --git
> >a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
> >hProtocol.inf
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
> >thProtocol.inf
> >new file mode 100644
> >index 0000000000..eb545d4601
> >--- /dev/null
> >+++
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
> >thProtocol.inf
> >@@ -0,0 +1,86 @@
> >+## @file
> >+# Instance of Device Path Library based on Device Path Protocol.
> >+#
> >+# Device Path Library that layers on top of the UEFI 2.0 Device Path Protocol.
> >+# If the DevicePathFromText/DevicePathToText protocol doesn't exist,
> >+the
> >library
> >+# uses its internal conversion logic.
> >+#
> >+# Copyright (c) 2019, Intel Corporation. All rights reserved.<BR> # #
> >+SPDX-License-Identifier: BSD-2-Clause-Patent # # ##
> >+
> >+[Defines]
> >+ INF_VERSION = 0x00010005
> >+ BASE_NAME = UefiDevicePathLibMandatoryDevicePathProtocol
> >+ MODULE_UNI_FILE =
> >UefiDevicePathLibMandatoryDevicePathProtocol.uni
> >+ FILE_GUID = 5A8389AF-DAE4-407E-8FD5-D026948BC579
> >+ MODULE_TYPE = UEFI_DRIVER
> >+ VERSION_STRING = 1.0
> >+ LIBRARY_CLASS = DevicePathLib|DXE_DRIVER
> >DXE_RUNTIME_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER
> SMM_CORE
> >+
> >+ CONSTRUCTOR =
> >UefiDevicePathLibMandatoryDevicePathProtocolConstructor
> >+
> >+#
> >+# VALID_ARCHITECTURES = IA32 X64 EBC
> >+#
> >+
> >+[Sources]
> >+ DevicePathUtilities.c
> >+ DevicePathToText.c
> >+ DevicePathFromText.c
> >+ UefiDevicePathLibMandatoryDevicePathProtocol.c
> >+ UefiDevicePathLib.h
> >+
> >+[Packages]
> >+ MdePkg/MdePkg.dec
> >+
> >+
> >+[LibraryClasses]
> >+ BaseLib
> >+ UefiBootServicesTableLib
> >+ MemoryAllocationLib
> >+ DebugLib
> >+ BaseMemoryLib
> >+ PcdLib
> >+ PrintLib
> >+
> >+[Guids]
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiVTUTF8Guid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiVT100Guid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiVT100PlusGuid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiPcAnsiGuid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiUartDevicePathGuid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiSasDevicePathGuid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiVirtualDiskGuid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiVirtualCdGuid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiPersistentVirtualDiskGuid
> >+ ## SOMETIMES_CONSUMES ## GUID
> >+ gEfiPersistentVirtualCdGuid
> >+
> >+[Protocols]
> >+ gEfiDevicePathProtocolGuid ## SOMETIMES_CONSUMES
> >+ gEfiDevicePathUtilitiesProtocolGuid ## CONSUMES
> >+ gEfiDevicePathToTextProtocolGuid ## SOMETIMES_CONSUMES
> >+ gEfiDevicePathFromTextProtocolGuid ## SOMETIMES_CONSUMES
> >+ gEfiDebugPortProtocolGuid ## UNDEFINED
> >+
> >+[Pcd]
> >+ gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount ##
> >SOMETIMES_CONSUMES
> >+
> >+[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER,
> >Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
> >+ gEfiDevicePathUtilitiesProtocolGuid AND
> >+ gEfiDevicePathToTextProtocolGuid AND
> >+ gEfiDevicePathFromTextProtocolGuid
> >+
> >diff --git
> >a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
> >hProtocol.uni
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
> >thProtocol.uni
> >new file mode 100644
> >index 0000000000..070f0add9f
> >--- /dev/null
> >+++
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePa
> >thProtocol.uni
> >@@ -0,0 +1,18 @@
> >+// /** @file
> >+// Instance of Device Path Library based on Device Path Protocol.
> >+//
> >+// Device Path Library that layers on top of the UEFI 2.0 Device Path Protocol.
> >+// If the DevicePathFromText/DevicePathToText protocol doesn't exist,
> >+the
> >library
> >+// uses its internal conversion logic.
> >+//
> >+// Copyright (c) 2013 - 2014, Intel Corporation. All rights
> >+reserved.<BR> // // SPDX-License-Identifier: BSD-2-Clause-Patent // //
> >+**/
> >+
> >+
> >+#string STR_MODULE_ABSTRACT #language en-US "Instance of Device
> >Path Library based on Device Path Protocol."
> >+
> >+#string STR_MODULE_DESCRIPTION #language en-US "Instance of
> >Device Path Library based on Device Path Protocol."
> >+
> >diff --git
> >a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathP
> >rotocol.c
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePath
> >Protocol.c
> >index 106ff245cc..68b4abfa2d 100644
> >---
> >a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathP
> >rotocol.c
> >+++
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePath
> >Protocol.c
> >@@ -8,7 +8,7 @@
> > environment varibles. Multi-instance device paths should never be placed
> > on a Handle.
> >
> >- Copyright (c) 2013 - 2018, Intel Corporation. All rights
> >reserved.<BR>
> >+ Copyright (c) 2013 - 2019, Intel Corporation. All rights
> >+ reserved.<BR>
> > SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> > **/
> >@@ -21,8 +21,7 @@ GLOBAL_REMOVE_IF_UNREFERENCED
> >EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *mDevicePathLib
> > GLOBAL_REMOVE_IF_UNREFERENCED
> >EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL
> >*mDevicePathLibDevicePathFromText = NULL;
> >
> > /**
> >- The constructor function caches the pointer to DevicePathUtilites
> >protocol,
> >- DevicePathToText protocol and DevicePathFromText protocol.
> >+ The constructor function caches the pointer to DevicePathUtilites protocol.
> >
> > The constructor function locates these three protocols from protocol
> >database.
> > It will caches the pointer to local protocol instance if that
> >operation fails @@ -48,8 +47,6 @@
> >UefiDevicePathLibOptionalDevicePathProtocolConstructor (
> > NULL,
> > (VOID**) &mDevicePathLibDevicePathUtilities
> > );
> >- ASSERT_EFI_ERROR (Status);
> >- ASSERT (mDevicePathLibDevicePathUtilities != NULL);
> > return Status;
> > }
> >
> >diff --git
> >a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathP
> >rotocol.inf
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePath
> >Protocol.inf
> >index e812e3e1d4..d194300bde 100644
> >---
> >a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathP
> >rotocol.inf
> >+++
> >b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePath
> >Protocol.inf
> >@@ -5,7 +5,7 @@
> > # If the DevicePathFromText/DevicePathToText protocol doesn't exist,
> >the library # uses its internal conversion logic.
> > #
> >-# Copyright (c) 2013 - 2018, Intel Corporation. All rights
> >reserved.<BR>
> >+# Copyright (c) 2013 - 2019, Intel Corporation. All rights
> >+reserved.<BR>
> > #
> > # SPDX-License-Identifier: BSD-2-Clause-Patent # @@ -79,6 +79,3 @@
> >[Pcd]
> > gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount ##
> >SOMETIMES_CONSUMES
> >
> >-[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER,
> >Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
> >- gEfiDevicePathUtilitiesProtocolGuid
> >-
> >--
> >2.21.0.windows.1
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-12-10 10:14 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-11-28 2:15 [PATCH 0/2] MdePkg/UefiDevicePathLib: Separate the lib instances Gao, Zhichao
2019-11-28 2:15 ` [PATCH 1/2] MdePkg/UefiDevicePathLib: Separate the device path lib Gao, Zhichao
2019-12-10 1:04 ` Liming Gao
2019-12-10 10:14 ` Gao, Zhichao
2019-11-28 2:15 ` [PATCH 2/2] MdePkg/dsc: Add UefiDevicePathLibMandatoryDevicePathProtocol for build Gao, Zhichao
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox