/**
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;
}
/**
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;
}
}
EfiReleaseLock (&Private->DataLock);
return EFI_SUCCESS;
}
}
//
// Leave critical section
//
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);
//
// 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.
//
if (SmbiosEntry->Smbios32BitTable) {
DEBUG ((EFI_D_INFO, "SmbiosRemove: remove from 32-bit table\n"));
}
if (SmbiosEntry->Smbios64BitTable) {
DEBUG ((EFI_D_INFO, "SmbiosRemove: remove from 64-bit table\n"));
}
//
// Update the whole SMBIOS table again based on which table the removed SMBIOS record is in.
//
SmbiosTableConstruction (SmbiosEntry->Smbios32BitTable, SmbiosEntry->Smbios64BitTable);
FreePool(SmbiosEntry);
EfiReleaseLock (&Private->DataLock);
return EFI_SUCCESS;
}
}
//
// Leave critical section
//
EfiReleaseLock (&Private->DataLock);
return EFI_INVALID_PARAMETER;
}
