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audk/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c

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/** @file
This code produces the Smbios protocol. It also responsible for constructing
SMBIOS table into system table.
Copyright (c) 2009 - 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 "SmbiosDxe.h"
//
// Module Global:
// Since this driver will only ever produce one instance of the
// protocol you are not required to dynamically allocate the PrivateData.
//
SMBIOS_INSTANCE mPrivateData;
UINTN mPreAllocatedPages = 0;
//
// Chassis for SMBIOS entry point structure that is to be installed into EFI system config table.
//
SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure = NULL;
SMBIOS_TABLE_ENTRY_POINT EntryPointStructureData = {
//
// AnchorString
//
{
0x5f,
0x53,
0x4d,
0x5f
},
//
// EntryPointStructureChecksum,TO BE FILLED
//
0,
//
// EntryPointStructure Length
//
0x1f,
//
// MajorVersion
//
(UINT8) (FixedPcdGet16 (PcdSmbiosVersion) >> 8),
//
// MinorVersion
//
(UINT8) (FixedPcdGet16 (PcdSmbiosVersion) & 0x00ff),
//
// MaxStructureSize, TO BE FILLED
//
0,
//
// EntryPointRevision
//
0,
//
// FormattedArea
//
{
0,
0,
0,
0,
0
},
//
// IntermediateAnchorString
//
{
0x5f,
0x44,
0x4d,
0x49,
0x5f
},
//
// IntermediateChecksum, TO BE FILLED
//
0,
//
// StructureTableLength, TO BE FILLED
//
0,
//
// StructureTableAddress, TO BE FILLED
//
0,
//
// NumberOfSmbiosStructures, TO BE FILLED
//
0,
//
// SmbiosBcdRevision
//
0
};
/**
Get the full size of SMBIOS structure including optional strings that follow the formatted structure.
@param This The EFI_SMBIOS_PROTOCOL instance.
@param Head Pointer to the beginning of SMBIOS structure.
@param Size The returned size.
@param NumberOfStrings The returned number of optional strings that follow the formatted structure.
@retval EFI_SUCCESS Size retured in Size.
@retval EFI_INVALID_PARAMETER Input SMBIOS structure mal-formed or Size is NULL.
**/
EFI_STATUS
EFIAPI
GetSmbiosStructureSize (
IN CONST EFI_SMBIOS_PROTOCOL *This,
IN EFI_SMBIOS_TABLE_HEADER *Head,
OUT UINTN *Size,
OUT UINTN *NumberOfStrings
)
{
UINTN FullSize;
UINTN StrLen;
UINTN MaxLen;
INT8* CharInStr;
if (Size == NULL || NumberOfStrings == NULL) {
return EFI_INVALID_PARAMETER;
}
FullSize = Head->Length;
CharInStr = (INT8*)Head + Head->Length;
*Size = FullSize;
*NumberOfStrings = 0;
StrLen = 0;
//
// look for the two consecutive zeros, check the string limit by the way.
//
while (*CharInStr != 0 || *(CharInStr+1) != 0) {
if (*CharInStr == 0) {
*Size += 1;
CharInStr++;
}
if (This->MajorVersion < 2 || (This->MajorVersion == 2 && This->MinorVersion < 7)){
MaxLen = SMBIOS_STRING_MAX_LENGTH;
} else {
//
// Reference SMBIOS 2.7, chapter 6.1.3, it will have no limit on the length of each individual text string.
// However, the length of the entire structure table (including all strings) must be reported
// in the Structure Table Length field of the SMBIOS Structure Table Entry Point,
// which is a WORD field limited to 65,535 bytes.
//
MaxLen = SMBIOS_TABLE_MAX_LENGTH;
}
for (StrLen = 0 ; StrLen < MaxLen; StrLen++) {
if (*(CharInStr+StrLen) == 0) {
break;
}
}
if (StrLen == MaxLen) {
return EFI_INVALID_PARAMETER;
}
//
// forward the pointer
//
CharInStr += StrLen;
*Size += StrLen;
*NumberOfStrings += 1;
}
//
// count ending two zeros.
//
*Size += 2;
return EFI_SUCCESS;
}
/**
Determin whether an SmbiosHandle has already in use.
@param Head Pointer to the beginning of SMBIOS structure.
@param Handle A unique handle will be assigned to the SMBIOS record.
@retval TRUE Smbios handle already in use.
@retval FALSE Smbios handle is NOT used.
**/
BOOLEAN
EFIAPI
CheckSmbiosHandleExistance (
IN LIST_ENTRY *Head,
IN EFI_SMBIOS_HANDLE Handle
)
{
LIST_ENTRY *Link;
SMBIOS_HANDLE_ENTRY *HandleEntry;
for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
HandleEntry = SMBIOS_HANDLE_ENTRY_FROM_LINK(Link);
if (HandleEntry->SmbiosHandle == Handle) {
return TRUE;
}
}
return FALSE;
}
/**
Get the max SmbiosHandle that could be use.
@param This The EFI_SMBIOS_PROTOCOL instance.
@param MaxHandle The max handle that could be assigned to the SMBIOS record.
**/
VOID
EFIAPI
GetMaxSmbiosHandle (
IN CONST EFI_SMBIOS_PROTOCOL *This,
IN OUT EFI_SMBIOS_HANDLE *MaxHandle
)
{
if (This->MajorVersion == 2 && This->MinorVersion == 0) {
*MaxHandle = 0xFFFE;
} else {
*MaxHandle = 0xFEFF;
}
}
/**
Get an SmbiosHandle that could use.
@param This The EFI_SMBIOS_PROTOCOL instance.
@param SmbiosHandle A unique handle will be assigned to the SMBIOS record.
@retval EFI_SUCCESS Smbios handle got.
@retval EFI_OUT_OF_RESOURCES Smbios handle is NOT available.
**/
EFI_STATUS
EFIAPI
GetAvailableSmbiosHandle (
IN CONST EFI_SMBIOS_PROTOCOL *This,
IN OUT EFI_SMBIOS_HANDLE *Handle
)
{
LIST_ENTRY *Head;
SMBIOS_INSTANCE *Private;
EFI_SMBIOS_HANDLE MaxSmbiosHandle;
EFI_SMBIOS_HANDLE AvailableHandle;
GetMaxSmbiosHandle(This, &MaxSmbiosHandle);
Private = SMBIOS_INSTANCE_FROM_THIS (This);
Head = &Private->AllocatedHandleListHead;
for (AvailableHandle = 0; AvailableHandle < MaxSmbiosHandle; AvailableHandle++) {
if (!CheckSmbiosHandleExistance(Head, AvailableHandle)) {
*Handle = AvailableHandle;
return EFI_SUCCESS;
}
}
return EFI_OUT_OF_RESOURCES;
}
/**
Add an SMBIOS record.
@param This The EFI_SMBIOS_PROTOCOL instance.
@param ProducerHandle The handle of the controller or driver associated with the SMBIOS information. NULL
means no handle.
@param SmbiosHandle On entry, the handle of the SMBIOS record to add. If FFFEh, then a unique handle
will be assigned to the SMBIOS record. If the SMBIOS handle is already in use,
EFI_ALREADY_STARTED is returned and the SMBIOS record is not updated.
@param Record The data for the fixed portion of the SMBIOS record. The format of the record is
determined by EFI_SMBIOS_TABLE_HEADER.Type. The size of the formatted area is defined
by EFI_SMBIOS_TABLE_HEADER.Length and either followed by a double-null (0x0000) or
a set of null terminated strings and a null.
@retval EFI_SUCCESS Record was added.
@retval EFI_OUT_OF_RESOURCES Record was not added due to lack of system resources.
@retval EFI_ALREADY_STARTED The SmbiosHandle passed in was already in use.
**/
EFI_STATUS
EFIAPI
SmbiosAdd (
IN CONST EFI_SMBIOS_PROTOCOL *This,
IN EFI_HANDLE ProducerHandle, OPTIONAL
IN OUT EFI_SMBIOS_HANDLE *SmbiosHandle,
IN EFI_SMBIOS_TABLE_HEADER *Record
)
{
VOID *Raw;
UINTN TotalSize;
UINTN RecordSize;
UINTN StructureSize;
UINTN NumberOfStrings;
EFI_STATUS Status;
LIST_ENTRY *Head;
SMBIOS_INSTANCE *Private;
EFI_SMBIOS_ENTRY *SmbiosEntry;
EFI_SMBIOS_HANDLE MaxSmbiosHandle;
SMBIOS_HANDLE_ENTRY *HandleEntry;
EFI_SMBIOS_RECORD_HEADER *InternalRecord;
if (SmbiosHandle == NULL) {
return EFI_INVALID_PARAMETER;
}
Private = SMBIOS_INSTANCE_FROM_THIS (This);
//
// Check whether SmbiosHandle is already in use
//
Head = &Private->AllocatedHandleListHead;
if (*SmbiosHandle != SMBIOS_HANDLE_PI_RESERVED && CheckSmbiosHandleExistance(Head, *SmbiosHandle)) {
return EFI_ALREADY_STARTED;
}
//
// when SmbiosHandle is 0xFFFE, an available handle will be assigned
//
if (*SmbiosHandle == SMBIOS_HANDLE_PI_RESERVED) {
Status = GetAvailableSmbiosHandle(This, SmbiosHandle);
if (EFI_ERROR(Status)) {
return Status;
}
} else {
//
// Check this handle validity
//
GetMaxSmbiosHandle(This, &MaxSmbiosHandle);
if (*SmbiosHandle > MaxSmbiosHandle) {
return EFI_INVALID_PARAMETER;
}
}
//
// Calculate record size and string number
//
Status = GetSmbiosStructureSize(This, Record, &StructureSize, &NumberOfStrings);
if (EFI_ERROR(Status)) {
return Status;
}
if (EntryPointStructure->TableLength + StructureSize > SMBIOS_TABLE_MAX_LENGTH) {
//
// The length of the entire structure table (including all strings) must be reported
// in the Structure Table Length field of the SMBIOS Structure Table Entry Point,
// which is a WORD field limited to 65,535 bytes.
//
return EFI_OUT_OF_RESOURCES;
}
//
// Enter into critical section
//
Status = EfiAcquireLockOrFail (&Private->DataLock);
if (EFI_ERROR (Status)) {
return Status;
}
RecordSize = sizeof (EFI_SMBIOS_RECORD_HEADER) + StructureSize;
TotalSize = sizeof (EFI_SMBIOS_ENTRY) + RecordSize;
//
// Allocate internal buffer
//
SmbiosEntry = AllocateZeroPool (TotalSize);
if (SmbiosEntry == NULL) {
EfiReleaseLock (&Private->DataLock);
return EFI_OUT_OF_RESOURCES;
}
HandleEntry = AllocateZeroPool (sizeof(SMBIOS_HANDLE_ENTRY));
if (HandleEntry == NULL) {
EfiReleaseLock (&Private->DataLock);
return EFI_OUT_OF_RESOURCES;
}
//
// Build Handle Entry and insert into linked list
//
HandleEntry->Signature = SMBIOS_HANDLE_ENTRY_SIGNATURE;
HandleEntry->SmbiosHandle = *SmbiosHandle;
InsertTailList(&Private->AllocatedHandleListHead, &HandleEntry->Link);
InternalRecord = (EFI_SMBIOS_RECORD_HEADER *) (SmbiosEntry + 1);
Raw = (VOID *) (InternalRecord + 1);
//
// Build internal record Header
//
InternalRecord->Version = EFI_SMBIOS_RECORD_HEADER_VERSION;
InternalRecord->HeaderSize = (UINT16) sizeof (EFI_SMBIOS_RECORD_HEADER);
InternalRecord->RecordSize = RecordSize;
InternalRecord->ProducerHandle = ProducerHandle;
InternalRecord->NumberOfStrings = NumberOfStrings;
//
// Insert record into the internal linked list
//
SmbiosEntry->Signature = EFI_SMBIOS_ENTRY_SIGNATURE;
SmbiosEntry->RecordHeader = InternalRecord;
SmbiosEntry->RecordSize = TotalSize;
InsertTailList (&Private->DataListHead, &SmbiosEntry->Link);
CopyMem (Raw, Record, StructureSize);
((EFI_SMBIOS_TABLE_HEADER*)Raw)->Handle = *SmbiosHandle;
//
// Some UEFI drivers (such as network) need some information in SMBIOS table.
// Here we create SMBIOS table and publish it in
// configuration table, so other UEFI drivers can get SMBIOS table from
// configuration table without depending on PI SMBIOS protocol.
//
SmbiosTableConstruction ();
//
// Leave critical section
//
EfiReleaseLock (&Private->DataLock);
return EFI_SUCCESS;
}
/**
Update the string associated with an existing SMBIOS record.
@param This The EFI_SMBIOS_PROTOCOL instance.
@param SmbiosHandle SMBIOS Handle of structure that will have its string updated.
@param StringNumber The non-zero string number of the string to update
@param String Update the StringNumber string with String.
@retval EFI_SUCCESS SmbiosHandle had its StringNumber String updated.
@retval EFI_INVALID_PARAMETER SmbiosHandle does not exist.
@retval EFI_UNSUPPORTED String was not added because it is longer than the SMBIOS Table supports.
@retval EFI_NOT_FOUND The StringNumber.is not valid for this SMBIOS record.
**/
EFI_STATUS
EFIAPI
SmbiosUpdateString (
IN CONST EFI_SMBIOS_PROTOCOL *This,
IN EFI_SMBIOS_HANDLE *SmbiosHandle,
IN UINTN *StringNumber,
IN CHAR8 *String
)
{
UINTN InputStrLen;
UINTN TargetStrLen;
UINTN StrIndex;
UINTN TargetStrOffset;
UINTN NewEntrySize;
CHAR8 *StrStart;
VOID *Raw;
LIST_ENTRY *Link;
LIST_ENTRY *Head;
EFI_STATUS Status;
SMBIOS_INSTANCE *Private;
EFI_SMBIOS_ENTRY *SmbiosEntry;
EFI_SMBIOS_ENTRY *ResizedSmbiosEntry;
EFI_SMBIOS_HANDLE MaxSmbiosHandle;
EFI_SMBIOS_TABLE_HEADER *Record;
EFI_SMBIOS_RECORD_HEADER *InternalRecord;
//
// Check args validity
//
GetMaxSmbiosHandle(This, &MaxSmbiosHandle);
if (*SmbiosHandle > MaxSmbiosHandle) {
return EFI_INVALID_PARAMETER;
}
if (String == NULL) {
return EFI_ABORTED;
}
if (*StringNumber == 0) {
return EFI_NOT_FOUND;
}
InputStrLen = AsciiStrLen(String);
if (This->MajorVersion < 2 || (This->MajorVersion == 2 && This->MinorVersion < 7)) {
if (InputStrLen > SMBIOS_STRING_MAX_LENGTH) {
return EFI_UNSUPPORTED;
}
} else {
//
// Reference SMBIOS 2.7, chapter 6.1.3, it will have no limit on the length of each individual text string.
// However, the length of the entire structure table (including all strings) must be reported
// in the Structure Table Length field of the SMBIOS Structure Table Entry Point,
// which is a WORD field limited to 65,535 bytes.
//
if (InputStrLen > SMBIOS_TABLE_MAX_LENGTH) {
return EFI_UNSUPPORTED;
}
}
Private = SMBIOS_INSTANCE_FROM_THIS (This);
//
// Enter into critical section
//
Status = EfiAcquireLockOrFail (&Private->DataLock);
if (EFI_ERROR (Status)) {
return Status;
}
Head = &Private->DataListHead;
for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
SmbiosEntry = SMBIOS_ENTRY_FROM_LINK(Link);
Record = (EFI_SMBIOS_TABLE_HEADER*)(SmbiosEntry->RecordHeader + 1);
if (Record->Handle == *SmbiosHandle) {
//
// Find out the specified SMBIOS record
//
if (*StringNumber > SmbiosEntry->RecordHeader->NumberOfStrings) {
EfiReleaseLock (&Private->DataLock);
return EFI_NOT_FOUND;
}
//
// Point to unformed string section
//
StrStart = (CHAR8 *) Record + Record->Length;
for (StrIndex = 1, TargetStrOffset = 0; StrIndex < *StringNumber; StrStart++, TargetStrOffset++) {
//
// A string ends in 00h
//
if (*StrStart == 0) {
StrIndex++;
}
//
// String section ends in double-null (0000h)
//
if (*StrStart == 0 && *(StrStart + 1) == 0) {
EfiReleaseLock (&Private->DataLock);
return EFI_NOT_FOUND;
}
}
if (*StrStart == 0) {
StrStart++;
TargetStrOffset++;
}
//
// Now we get the string target
//
TargetStrLen = AsciiStrLen(StrStart);
if (InputStrLen == TargetStrLen) {
AsciiStrCpy(StrStart, String);
//
// Some UEFI drivers (such as network) need some information in SMBIOS table.
// Here we create SMBIOS table and publish it in
// configuration table, so other UEFI drivers can get SMBIOS table from
// configuration table without depending on PI SMBIOS protocol.
//
SmbiosTableConstruction ();
EfiReleaseLock (&Private->DataLock);
return EFI_SUCCESS;
}
if (EntryPointStructure->TableLength + InputStrLen - TargetStrLen > SMBIOS_TABLE_MAX_LENGTH) {
//
// The length of the entire structure table (including all strings) must be reported
// in the Structure Table Length field of the SMBIOS Structure Table Entry Point,
// which is a WORD field limited to 65,535 bytes.
//
return EFI_UNSUPPORTED;
}
//
// Original string buffer size is not exactly match input string length.
// Re-allocate buffer is needed.
//
NewEntrySize = SmbiosEntry->RecordSize + InputStrLen - TargetStrLen;
ResizedSmbiosEntry = AllocateZeroPool (NewEntrySize);
if (ResizedSmbiosEntry == NULL) {
EfiReleaseLock (&Private->DataLock);
return EFI_OUT_OF_RESOURCES;
}
InternalRecord = (EFI_SMBIOS_RECORD_HEADER *) (ResizedSmbiosEntry + 1);
Raw = (VOID *) (InternalRecord + 1);
//
// Build internal record Header
//
InternalRecord->Version = EFI_SMBIOS_RECORD_HEADER_VERSION;
InternalRecord->HeaderSize = (UINT16) sizeof (EFI_SMBIOS_RECORD_HEADER);
InternalRecord->RecordSize = SmbiosEntry->RecordHeader->RecordSize + InputStrLen - TargetStrLen;
InternalRecord->ProducerHandle = SmbiosEntry->RecordHeader->ProducerHandle;
InternalRecord->NumberOfStrings = SmbiosEntry->RecordHeader->NumberOfStrings;
//
// Copy SMBIOS structure and optional strings.
//
CopyMem (Raw, SmbiosEntry->RecordHeader + 1, Record->Length + TargetStrOffset);
CopyMem ((VOID*)((UINTN)Raw + Record->Length + TargetStrOffset), String, InputStrLen + 1);
CopyMem ((CHAR8*)((UINTN)Raw + Record->Length + TargetStrOffset + InputStrLen + 1),
(CHAR8*)Record + Record->Length + TargetStrOffset + TargetStrLen + 1,
SmbiosEntry->RecordHeader->RecordSize - sizeof (EFI_SMBIOS_RECORD_HEADER) - Record->Length - TargetStrOffset - TargetStrLen - 1);
//
// Insert new record
//
ResizedSmbiosEntry->Signature = EFI_SMBIOS_ENTRY_SIGNATURE;
ResizedSmbiosEntry->RecordHeader = InternalRecord;
ResizedSmbiosEntry->RecordSize = NewEntrySize;
InsertTailList (Link->ForwardLink, &ResizedSmbiosEntry->Link);
//
// Remove old record
//
RemoveEntryList(Link);
FreePool(SmbiosEntry);
//
// Some UEFI drivers (such as network) need some information in SMBIOS table.
// Here we create SMBIOS table and publish it in
// configuration table, so other UEFI drivers can get SMBIOS table from
// configuration table without depending on PI SMBIOS protocol.
//
SmbiosTableConstruction ();
EfiReleaseLock (&Private->DataLock);
return EFI_SUCCESS;
}
}
EfiReleaseLock (&Private->DataLock);
return EFI_INVALID_PARAMETER;
}
/**
Remove an SMBIOS record.
@param This The EFI_SMBIOS_PROTOCOL instance.
@param SmbiosHandle The handle of the SMBIOS record to remove.
@retval EFI_SUCCESS SMBIOS record was removed.
@retval EFI_INVALID_PARAMETER SmbiosHandle does not specify a valid SMBIOS record.
**/
EFI_STATUS
EFIAPI
SmbiosRemove (
IN CONST EFI_SMBIOS_PROTOCOL *This,
IN EFI_SMBIOS_HANDLE SmbiosHandle
)
{
LIST_ENTRY *Link;
LIST_ENTRY *Head;
EFI_STATUS Status;
EFI_SMBIOS_HANDLE MaxSmbiosHandle;
SMBIOS_INSTANCE *Private;
EFI_SMBIOS_ENTRY *SmbiosEntry;
SMBIOS_HANDLE_ENTRY *HandleEntry;
EFI_SMBIOS_TABLE_HEADER *Record;
//
// Check args validity
//
GetMaxSmbiosHandle(This, &MaxSmbiosHandle);
if (SmbiosHandle > MaxSmbiosHandle) {
return EFI_INVALID_PARAMETER;
}
Private = SMBIOS_INSTANCE_FROM_THIS (This);
//
// Enter into critical section
//
Status = EfiAcquireLockOrFail (&Private->DataLock);
if (EFI_ERROR (Status)) {
return Status;
}
Head = &Private->DataListHead;
for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
SmbiosEntry = SMBIOS_ENTRY_FROM_LINK(Link);
Record = (EFI_SMBIOS_TABLE_HEADER*)(SmbiosEntry->RecordHeader + 1);
if (Record->Handle == SmbiosHandle) {
//
// Remove specified smobios record from DataList
//
RemoveEntryList(Link);
FreePool(SmbiosEntry);
//
// Remove this handle from AllocatedHandleList
//
Head = &Private->AllocatedHandleListHead;
for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
HandleEntry = SMBIOS_HANDLE_ENTRY_FROM_LINK(Link);
if (HandleEntry->SmbiosHandle == SmbiosHandle) {
RemoveEntryList(Link);
FreePool(HandleEntry);
break;
}
}
//
// Some UEFI drivers (such as network) need some information in SMBIOS table.
// Here we create SMBIOS table and publish it in
// configuration table, so other UEFI drivers can get SMBIOS table from
// configuration table without depending on PI SMBIOS protocol.
//
SmbiosTableConstruction ();
EfiReleaseLock (&Private->DataLock);
return EFI_SUCCESS;
}
}
//
// Leave critical section
//
EfiReleaseLock (&Private->DataLock);
return EFI_INVALID_PARAMETER;
}
/**
Allow the caller to discover all or some of the SMBIOS records.
@param This The EFI_SMBIOS_PROTOCOL instance.
@param SmbiosHandle On entry, points to the previous handle of the SMBIOS record. On exit, points to the
next SMBIOS record handle. If it is FFFEh on entry, then the first SMBIOS record
handle will be returned. If it returns FFFEh on exit, then there are no more SMBIOS records.
@param Type On entry it means return the next SMBIOS record of type Type. If a NULL is passed in
this functionally it ignored. Type is not modified by the GetNext() function.
@param Record On exit, points to the SMBIOS Record consisting of the formatted area followed by
the unformatted area. The unformatted area optionally contains text strings.
@param ProducerHandle On exit, points to the ProducerHandle registered by Add(). If no ProducerHandle was passed into Add() NULL is returned.
If a NULL pointer is passed in no data will be returned
@retval EFI_SUCCESS SMBIOS record information was successfully returned in Record.
@retval EFI_NOT_FOUND The SMBIOS record with SmbiosHandle was the last available record.
**/
EFI_STATUS
EFIAPI
SmbiosGetNext (
IN CONST EFI_SMBIOS_PROTOCOL *This,
IN OUT EFI_SMBIOS_HANDLE *SmbiosHandle,
IN EFI_SMBIOS_TYPE *Type, OPTIONAL
OUT EFI_SMBIOS_TABLE_HEADER **Record,
OUT EFI_HANDLE *ProducerHandle OPTIONAL
)
{
BOOLEAN StartPointFound;
LIST_ENTRY *Link;
LIST_ENTRY *Head;
SMBIOS_INSTANCE *Private;
EFI_SMBIOS_ENTRY *SmbiosEntry;
EFI_SMBIOS_TABLE_HEADER *SmbiosTableHeader;
if (SmbiosHandle == NULL) {
return EFI_INVALID_PARAMETER;
}
StartPointFound = FALSE;
Private = SMBIOS_INSTANCE_FROM_THIS (This);
Head = &Private->DataListHead;
for (Link = Head->ForwardLink; Link != Head; Link = Link->ForwardLink) {
SmbiosEntry = SMBIOS_ENTRY_FROM_LINK(Link);
SmbiosTableHeader = (EFI_SMBIOS_TABLE_HEADER*)(SmbiosEntry->RecordHeader + 1);
//
// If SmbiosHandle is 0xFFFE, the first matched SMBIOS record handle will be returned
//
if (*SmbiosHandle == SMBIOS_HANDLE_PI_RESERVED) {
if ((Type != NULL) && (*Type != SmbiosTableHeader->Type)) {
continue;
}
*SmbiosHandle = SmbiosTableHeader->Handle;
*Record =SmbiosTableHeader;
if (ProducerHandle != NULL) {
*ProducerHandle = SmbiosEntry->RecordHeader->ProducerHandle;
}
return EFI_SUCCESS;
}
//
// Start this round search from the next SMBIOS handle
//
if (!StartPointFound && (*SmbiosHandle == SmbiosTableHeader->Handle)) {
StartPointFound = TRUE;
continue;
}
if (StartPointFound) {
if ((Type != NULL) && (*Type != SmbiosTableHeader->Type)) {
continue;
}
*SmbiosHandle = SmbiosTableHeader->Handle;
*Record = SmbiosTableHeader;
if (ProducerHandle != NULL) {
*ProducerHandle = SmbiosEntry->RecordHeader->ProducerHandle;
}
return EFI_SUCCESS;
}
}
*SmbiosHandle = SMBIOS_HANDLE_PI_RESERVED;
return EFI_NOT_FOUND;
}
/**
Allow the caller to discover all of the SMBIOS records.
@param This The EFI_SMBIOS_PROTOCOL instance.
@param CurrentSmbiosEntry On exit, points to the SMBIOS entry on the list which includes the returned SMBIOS record information.
If *CurrentSmbiosEntry is NULL on entry, then the first SMBIOS entry on the list will be returned.
@param Record On exit, points to the SMBIOS Record consisting of the formatted area followed by
the unformatted area. The unformatted area optionally contains text strings.
@retval EFI_SUCCESS SMBIOS record information was successfully returned in Record.
*CurrentSmbiosEntry points to the SMBIOS entry which includes the returned SMBIOS record information.
@retval EFI_NOT_FOUND There is no more SMBIOS entry.
**/
EFI_STATUS
EFIAPI
GetNextSmbiosRecord (
IN CONST EFI_SMBIOS_PROTOCOL *This,
IN OUT EFI_SMBIOS_ENTRY **CurrentSmbiosEntry,
OUT EFI_SMBIOS_TABLE_HEADER **Record
)
{
LIST_ENTRY *Link;
LIST_ENTRY *Head;
SMBIOS_INSTANCE *Private;
EFI_SMBIOS_ENTRY *SmbiosEntry;
EFI_SMBIOS_TABLE_HEADER *SmbiosTableHeader;
Private = SMBIOS_INSTANCE_FROM_THIS (This);
if (*CurrentSmbiosEntry == NULL) {
//
// Get the beginning of SMBIOS entry.
//
Head = &Private->DataListHead;
} else {
//
// Get previous SMBIOS entry and make it as start point.
//
Head = &(*CurrentSmbiosEntry)->Link;
}
Link = Head->ForwardLink;
if (Link == &Private->DataListHead) {
//
// If no more SMBIOS entry in the list, return not found.
//
return EFI_NOT_FOUND;
}
SmbiosEntry = SMBIOS_ENTRY_FROM_LINK(Link);
SmbiosTableHeader = (EFI_SMBIOS_TABLE_HEADER*)(SmbiosEntry->RecordHeader + 1);
*Record = SmbiosTableHeader;
*CurrentSmbiosEntry = SmbiosEntry;
return EFI_SUCCESS;
}
/**
Assembles SMBIOS table from the SMBIOS protocol. Produce Table
Entry Point and return the pointer to it.
@param TableEntryPointStructure On exit, points to the SMBIOS entrypoint structure.
@retval EFI_SUCCESS Structure created sucessfully.
@retval EFI_NOT_READY Some of The SMBIOS records was not available yet.
@retval EFI_OUT_OF_RESOURCES No enough memory.
**/
EFI_STATUS
EFIAPI
SmbiosCreateTable (
OUT VOID **TableEntryPointStructure
)
{
UINT8 *BufferPointer;
UINTN RecordSize;
UINTN NumOfStr;
EFI_STATUS Status;
EFI_SMBIOS_HANDLE SmbiosHandle;
EFI_SMBIOS_PROTOCOL *SmbiosProtocol;
EFI_PHYSICAL_ADDRESS PhysicalAddress;
EFI_SMBIOS_TABLE_HEADER *SmbiosRecord;
EFI_SMBIOS_TABLE_END_STRUCTURE EndStructure;
EFI_SMBIOS_ENTRY *CurrentSmbiosEntry;
Status = EFI_SUCCESS;
BufferPointer = NULL;
//
// Get Smbios protocol to traverse SMBIOS records.
//
SmbiosProtocol = &mPrivateData.Smbios;
//
// Make some statistics about all the structures
//
EntryPointStructure->NumberOfSmbiosStructures = 0;
EntryPointStructure->TableLength = 0;
EntryPointStructure->MaxStructureSize = 0;
//
// Calculate EPS Table Length
//
CurrentSmbiosEntry = NULL;
do {
Status = GetNextSmbiosRecord (SmbiosProtocol, &CurrentSmbiosEntry, &SmbiosRecord);
if (Status == EFI_SUCCESS) {
GetSmbiosStructureSize(SmbiosProtocol, SmbiosRecord, &RecordSize, &NumOfStr);
//
// Record NumberOfSmbiosStructures, TableLength and MaxStructureSize
//
EntryPointStructure->NumberOfSmbiosStructures++;
EntryPointStructure->TableLength = (UINT16) (EntryPointStructure->TableLength + RecordSize);
if (RecordSize > EntryPointStructure->MaxStructureSize) {
EntryPointStructure->MaxStructureSize = (UINT16) RecordSize;
}
}
} while (!EFI_ERROR(Status));
//
// Create End-Of-Table structure
//
GetMaxSmbiosHandle(SmbiosProtocol, &SmbiosHandle);
EndStructure.Header.Type = EFI_SMBIOS_TYPE_END_OF_TABLE;
EndStructure.Header.Length = (UINT8) sizeof (EFI_SMBIOS_TABLE_HEADER);
EndStructure.Header.Handle = SmbiosHandle;
EndStructure.Tailing[0] = 0;
EndStructure.Tailing[1] = 0;
EntryPointStructure->NumberOfSmbiosStructures++;
EntryPointStructure->TableLength = (UINT16) (EntryPointStructure->TableLength + sizeof (EndStructure));
if (sizeof (EndStructure) > EntryPointStructure->MaxStructureSize) {
EntryPointStructure->MaxStructureSize = (UINT16) sizeof (EndStructure);
}
if ((UINTN) EFI_SIZE_TO_PAGES (EntryPointStructure->TableLength) > mPreAllocatedPages) {
//
// If new SMBIOS talbe size exceeds the original pre-allocated page,
// it is time to re-allocate memory (below 4GB).
//
if (EntryPointStructure->TableAddress != 0) {
//
// Free the original pre-allocated page
//
FreePages (
(VOID*)(UINTN)EntryPointStructure->TableAddress,
mPreAllocatedPages
);
EntryPointStructure->TableAddress = 0;
mPreAllocatedPages = 0;
}
PhysicalAddress = 0xffffffff;
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiReservedMemoryType,
EFI_SIZE_TO_PAGES (EntryPointStructure->TableLength),
&PhysicalAddress
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "SmbiosCreateTable() could not allocate SMBIOS table < 4GB\n"));
EntryPointStructure->TableAddress = 0;
return EFI_OUT_OF_RESOURCES;
} else {
EntryPointStructure->TableAddress = (UINT32) PhysicalAddress;
mPreAllocatedPages = EFI_SIZE_TO_PAGES (EntryPointStructure->TableLength);
}
}
//
// Assemble the tables
//
ASSERT (EntryPointStructure->TableAddress != 0);
BufferPointer = (UINT8 *) (UINTN) EntryPointStructure->TableAddress;
CurrentSmbiosEntry = NULL;
do {
Status = GetNextSmbiosRecord (SmbiosProtocol, &CurrentSmbiosEntry, &SmbiosRecord);
if (Status == EFI_SUCCESS) {
GetSmbiosStructureSize(SmbiosProtocol, SmbiosRecord, &RecordSize, &NumOfStr);
CopyMem (BufferPointer, SmbiosRecord, RecordSize);
BufferPointer = BufferPointer + RecordSize;
}
} while (!EFI_ERROR(Status));
//
// Assemble End-Of-Table structure
//
CopyMem (BufferPointer, &EndStructure, sizeof (EndStructure));
//
// Fixup checksums in the Entry Point Structure
//
EntryPointStructure->IntermediateChecksum = 0;
EntryPointStructure->EntryPointStructureChecksum = 0;
EntryPointStructure->IntermediateChecksum =
CalculateCheckSum8 ((UINT8 *) EntryPointStructure + 0x10, EntryPointStructure->EntryPointLength - 0x10);
EntryPointStructure->EntryPointStructureChecksum =
CalculateCheckSum8 ((UINT8 *) EntryPointStructure, EntryPointStructure->EntryPointLength);
//
// Returns the pointer
//
*TableEntryPointStructure = EntryPointStructure;
return EFI_SUCCESS;
}
/**
Create SMBIOS Table and install it to the System Table.
**/
VOID
EFIAPI
SmbiosTableConstruction (
VOID
)
{
UINT8 *Eps;
EFI_STATUS Status;
Status = SmbiosCreateTable ((VOID **) &Eps);
if (!EFI_ERROR (Status)) {
gBS->InstallConfigurationTable (&gEfiSmbiosTableGuid, Eps);
}
}
/**
Driver to produce Smbios protocol and pre-allocate 1 page for the final SMBIOS table.
@param ImageHandle Module's image handle
@param SystemTable Pointer of EFI_SYSTEM_TABLE
@retval EFI_SUCCESS Smbios protocol installed
@retval Other No protocol installed, unload driver.
**/
EFI_STATUS
EFIAPI
SmbiosDriverEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS PhysicalAddress;
mPrivateData.Signature = SMBIOS_INSTANCE_SIGNATURE;
mPrivateData.Smbios.Add = SmbiosAdd;
mPrivateData.Smbios.UpdateString = SmbiosUpdateString;
mPrivateData.Smbios.Remove = SmbiosRemove;
mPrivateData.Smbios.GetNext = SmbiosGetNext;
mPrivateData.Smbios.MajorVersion = (UINT8) (FixedPcdGet16 (PcdSmbiosVersion) >> 8);
mPrivateData.Smbios.MinorVersion = (UINT8) (FixedPcdGet16 (PcdSmbiosVersion) & 0x00ff);
InitializeListHead (&mPrivateData.DataListHead);
InitializeListHead (&mPrivateData.AllocatedHandleListHead);
EfiInitializeLock (&mPrivateData.DataLock, TPL_NOTIFY);
//
// Initialize the EntryPointStructure with initial values.
// Allocate memory (below 4GB).
//
PhysicalAddress = 0xffffffff;
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiReservedMemoryType,
EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
&PhysicalAddress
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "SmbiosDriverEntryPoint() could not allocate EntryPointStructure < 4GB\n"));
Status = gBS->AllocatePages (
AllocateAnyPages,
EfiReservedMemoryType,
EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
&PhysicalAddress
);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
}
EntryPointStructure = (SMBIOS_TABLE_ENTRY_POINT *) (UINTN) PhysicalAddress;
CopyMem (
EntryPointStructure,
&EntryPointStructureData,
sizeof (SMBIOS_TABLE_ENTRY_POINT)
);
//
// Pre-allocate 1 page for SMBIOS table below 4GB.
// SMBIOS table will be updated when new SMBIOS type is added or
// existing SMBIOS type is updated. If the total size of SMBIOS table exceeds 1 page,
// we will re-allocate new memory when creating whole SMBIOS table.
//
PhysicalAddress = 0xffffffff;
Status = gBS->AllocatePages (
AllocateMaxAddress,
EfiReservedMemoryType,
1,
&PhysicalAddress
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "SmbiosDriverEntryPoint() could not allocate SMBIOS table < 4GB\n"));
EntryPointStructure->TableAddress = 0;
} else {
EntryPointStructure->TableAddress = (UINT32) PhysicalAddress;
mPreAllocatedPages = 1;
}
//
// Init TableLength to the length of End-Of-Table structure for SmbiosAdd() called at the first time
// to check the TableLength limitation.
//
EntryPointStructure->TableLength = sizeof (EFI_SMBIOS_TABLE_END_STRUCTURE);
//
// Make a new handle and install the protocol
//
mPrivateData.Handle = NULL;
Status = gBS->InstallProtocolInterface (
&mPrivateData.Handle,
&gEfiSmbiosProtocolGuid,
EFI_NATIVE_INTERFACE,
&mPrivateData.Smbios
);
return Status;
}
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