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audk/OvmfPkg/PlatformDxe/Platform.c

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/** @file
This driver effectuates OVMF's platform configuration settings and exposes
them via HII.
Copyright (C) 2014, Red Hat, Inc.
Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/DevicePathLib.h>
#include <Library/HiiLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PrintLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiHiiServicesLib.h>
#include <Protocol/DevicePath.h>
#include <Protocol/GraphicsOutput.h>
#include <Protocol/HiiConfigAccess.h>
#include <Guid/MdeModuleHii.h>
#include <Guid/OvmfPlatformConfig.h>
#include "Platform.h"
#include "PlatformConfig.h"
//
// The HiiAddPackages() library function requires that any controller (or
// image) handle, to be associated with the HII packages under installation, be
// "decorated" with a device path. The tradition seems to be a vendor device
// path.
//
// We'd like to associate our HII packages with the driver's image handle. The
// first idea is to use the driver image's device path. Unfortunately, loaded
// images only come with an EFI_LOADED_IMAGE_DEVICE_PATH_PROTOCOL (not the
// usual EFI_DEVICE_PATH_PROTOCOL), ie. a different GUID. In addition, even the
// EFI_LOADED_IMAGE_DEVICE_PATH_PROTOCOL interface may be NULL, if the image
// has been loaded from an "unnamed" memory source buffer.
//
// Hence let's just stick with the tradition -- use a dedicated vendor device
// path, with the driver's FILE_GUID.
//
#pragma pack(1)
typedef struct {
VENDOR_DEVICE_PATH VendorDevicePath;
EFI_DEVICE_PATH_PROTOCOL End;
} PKG_DEVICE_PATH;
#pragma pack()
STATIC PKG_DEVICE_PATH mPkgDevicePath = {
{
{
HARDWARE_DEVICE_PATH,
HW_VENDOR_DP,
{
(UINT8)(sizeof (VENDOR_DEVICE_PATH)),
(UINT8)(sizeof (VENDOR_DEVICE_PATH) >> 8)
}
},
EFI_CALLER_ID_GUID
},
{
END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE,
{
(UINT8)(END_DEVICE_PATH_LENGTH),
(UINT8)(END_DEVICE_PATH_LENGTH >> 8)
}
}
};
//
// The configuration interface between the HII engine (form display etc) and
// this driver.
//
STATIC EFI_HII_CONFIG_ACCESS_PROTOCOL mConfigAccess;
//
// The handle representing our list of packages after installation.
//
STATIC EFI_HII_HANDLE mInstalledPackages;
//
// The arrays below constitute our HII package list. They are auto-generated by
// the VFR compiler and linked into the driver image during the build.
//
// - The strings package receives its C identifier from the driver's BASE_NAME,
// plus "Strings".
//
// - The forms package receives its C identifier from the VFR file's basename,
// plus "Bin".
//
//
extern UINT8 PlatformDxeStrings[];
extern UINT8 PlatformFormsBin[];
//
// We want to be notified about GOP installations until we find one GOP
// interface that lets us populate the form.
//
STATIC EFI_EVENT mGopEvent;
//
// The registration record underneath this pointer allows us to iterate through
// the GOP instances one by one.
//
STATIC VOID *mGopTracker;
//
// The driver image handle, used to obtain the device path for <ConfigHdr>.
//
STATIC EFI_HANDLE mImageHandle;
//
// Cache the resolutions we get from the GOP.
//
typedef struct {
UINT32 X;
UINT32 Y;
} GOP_MODE;
STATIC UINTN mNumGopModes;
STATIC GOP_MODE *mGopModes;
/**
Load the persistent platform configuration and translate it to binary form
state.
If the platform configuration is missing, then the function fills in a
default state.
@param[out] MainFormState Binary form/widget state after translation.
@retval EFI_SUCCESS Form/widget state ready.
@return Error codes from underlying functions.
**/
STATIC
EFI_STATUS
EFIAPI
PlatformConfigToFormState (
OUT MAIN_FORM_STATE *MainFormState
)
{
EFI_STATUS Status;
PLATFORM_CONFIG PlatformConfig;
UINT64 OptionalElements;
UINTN ModeNumber;
ZeroMem (MainFormState, sizeof *MainFormState);
Status = PlatformConfigLoad (&PlatformConfig, &OptionalElements);
switch (Status) {
case EFI_SUCCESS:
if (OptionalElements & PLATFORM_CONFIG_F_GRAPHICS_RESOLUTION) {
//
// Format the preferred resolution as text.
//
UnicodeSPrintAsciiFormat (
(CHAR16 *)MainFormState->CurrentPreferredResolution,
sizeof MainFormState->CurrentPreferredResolution,
"%Ldx%Ld",
(INT64)PlatformConfig.HorizontalResolution,
(INT64)PlatformConfig.VerticalResolution
);
//
// Try to locate it in the drop-down list too. This may not succeed, but
// that's fine.
//
for (ModeNumber = 0; ModeNumber < mNumGopModes; ++ModeNumber) {
if ((mGopModes[ModeNumber].X == PlatformConfig.HorizontalResolution) &&
(mGopModes[ModeNumber].Y == PlatformConfig.VerticalResolution))
{
MainFormState->NextPreferredResolution = (UINT32)ModeNumber;
break;
}
}
break;
}
//
// fall through otherwise
//
case EFI_NOT_FOUND:
UnicodeSPrintAsciiFormat (
(CHAR16 *)MainFormState->CurrentPreferredResolution,
sizeof MainFormState->CurrentPreferredResolution,
"Unset"
);
break;
default:
return Status;
}
return EFI_SUCCESS;
}
/**
This function is called by the HII machinery when it fetches the form state.
See the precise documentation in the UEFI spec.
@param[in] This The Config Access Protocol instance.
@param[in] Request A <ConfigRequest> format UCS-2 string describing the
query.
@param[out] Progress A pointer into Request on output, identifying the query
element where processing failed.
@param[out] Results A <MultiConfigAltResp> format UCS-2 string that has
all values filled in for the names in the Request
string.
@retval EFI_SUCCESS Extraction of form state in <MultiConfigAltResp>
encoding successful.
@return Status codes from underlying functions.
**/
STATIC
EFI_STATUS
EFIAPI
ExtractConfig (
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN CONST EFI_STRING Request,
OUT EFI_STRING *Progress,
OUT EFI_STRING *Results
)
{
MAIN_FORM_STATE MainFormState;
EFI_STATUS Status;
EFI_STRING ConfigRequestHdr;
EFI_STRING ConfigRequest;
UINTN Size;
BOOLEAN AllocatedRequest;
DEBUG ((DEBUG_VERBOSE, "%a: Request=\"%s\"\n", __func__, Request));
if ((Progress == NULL) || (Results == NULL)) {
return EFI_INVALID_PARAMETER;
}
ConfigRequestHdr = NULL;
ConfigRequest = NULL;
Size = 0;
AllocatedRequest = FALSE;
//
// Check if <ConfigHdr> matches the GUID and name
//
*Progress = Request;
if ((Request != NULL) &&
!HiiIsConfigHdrMatch (
Request,
&gOvmfPlatformConfigGuid,
mHiiFormName
)
)
{
return EFI_NOT_FOUND;
}
Status = PlatformConfigToFormState (&MainFormState);
if (EFI_ERROR (Status)) {
return Status;
}
if ((Request == NULL) || (StrStr (Request, L"OFFSET") == NULL)) {
//
// Request has no <RequestElement>, so construct full request string.
// Allocate and fill a buffer large enough to hold <ConfigHdr>
// followed by "&OFFSET=0&WIDTH=WWWWWWWWWWWWWWWW" followed by a
// null terminator.
//
ConfigRequestHdr = HiiConstructConfigHdr (
&gOvmfPlatformConfigGuid,
mVariableName,
mImageHandle
);
if (ConfigRequestHdr == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Size = (StrLen (ConfigRequestHdr) + 32 + 1) * sizeof (CHAR16);
ConfigRequest = AllocateZeroPool (Size);
AllocatedRequest = TRUE;
if (ConfigRequest == NULL) {
FreePool (ConfigRequestHdr);
return EFI_OUT_OF_RESOURCES;
}
UnicodeSPrint (
ConfigRequest,
Size,
L"%s&OFFSET=0&WIDTH=%016LX",
ConfigRequestHdr,
sizeof MainFormState
);
FreePool (ConfigRequestHdr);
} else {
ConfigRequest = Request;
}
//
// Answer the textual request keying off the binary form state.
//
Status = gHiiConfigRouting->BlockToConfig (
gHiiConfigRouting,
ConfigRequest,
(VOID *)&MainFormState,
sizeof MainFormState,
Results,
Progress
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"%a: BlockToConfig(): %r, Progress=\"%s\"\n",
__func__,
Status,
(Status == EFI_DEVICE_ERROR) ? NULL : *Progress
));
} else {
DEBUG ((DEBUG_VERBOSE, "%a: Results=\"%s\"\n", __func__, *Results));
}
//
// If we used a newly allocated ConfigRequest, update Progress to point to
// original Request instead of ConfigRequest.
//
if (Request == NULL) {
*Progress = NULL;
} else if (StrStr (Request, L"OFFSET") == NULL) {
if (EFI_ERROR (Status)) {
//
// Since we constructed ConfigRequest, failure can only occur if there
// is not enough memory. In this case, we point Progress to the first
// character of Request.
//
*Progress = Request;
} else {
//
// In case of success, we point Progress to the null terminator of
// Request.
//
*Progress = Request + StrLen (Request);
}
}
if (AllocatedRequest) {
FreePool (ConfigRequest);
}
return Status;
}
/**
Interpret the binary form state and save it as persistent platform
configuration.
@param[in] MainFormState Binary form/widget state to verify and save.
@retval EFI_SUCCESS Platform configuration saved.
@return Error codes from underlying functions.
**/
STATIC
EFI_STATUS
EFIAPI
FormStateToPlatformConfig (
IN CONST MAIN_FORM_STATE *MainFormState
)
{
EFI_STATUS Status;
PLATFORM_CONFIG PlatformConfig;
CONST GOP_MODE *GopMode;
//
// There's nothing to do with the textual CurrentPreferredResolution field.
// We verify and translate the selection in the drop-down list.
//
if (MainFormState->NextPreferredResolution >= mNumGopModes) {
return EFI_INVALID_PARAMETER;
}
GopMode = mGopModes + MainFormState->NextPreferredResolution;
ZeroMem (&PlatformConfig, sizeof PlatformConfig);
PlatformConfig.HorizontalResolution = GopMode->X;
PlatformConfig.VerticalResolution = GopMode->Y;
Status = PlatformConfigSave (&PlatformConfig);
return Status;
}
/**
This function is called by the HII machinery when it wants the driver to
interpret and persist the form state.
See the precise documentation in the UEFI spec.
@param[in] This The Config Access Protocol instance.
@param[in] Configuration A <ConfigResp> format UCS-2 string describing the
form state.
@param[out] Progress A pointer into Configuration on output,
identifying the element where processing failed.
@retval EFI_SUCCESS Configuration verified, state permanent.
@return Status codes from underlying functions.
**/
STATIC
EFI_STATUS
EFIAPI
RouteConfig (
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN CONST EFI_STRING Configuration,
OUT EFI_STRING *Progress
)
{
MAIN_FORM_STATE MainFormState;
UINTN BlockSize;
EFI_STATUS Status;
DEBUG ((
DEBUG_VERBOSE,
"%a: Configuration=\"%s\"\n",
__func__,
Configuration
));
if ((Progress == NULL) || (Configuration == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Check if <ConfigHdr> matches the GUID and name
//
*Progress = Configuration;
if ((Configuration != NULL) &&
!HiiIsConfigHdrMatch (
Configuration,
&gOvmfPlatformConfigGuid,
mHiiFormName
)
)
{
return EFI_NOT_FOUND;
}
//
// the "read" step in RMW
//
Status = PlatformConfigToFormState (&MainFormState);
if (EFI_ERROR (Status)) {
*Progress = Configuration;
return Status;
}
//
// the "modify" step in RMW
//
// (Update the binary form state. This update may be partial, which is why in
// general we must pre-load the form state from the platform config.)
//
BlockSize = sizeof MainFormState;
Status = gHiiConfigRouting->ConfigToBlock (
gHiiConfigRouting,
Configuration,
(VOID *)&MainFormState,
&BlockSize,
Progress
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"%a: ConfigToBlock(): %r, Progress=\"%s\"\n",
__func__,
Status,
(Status == EFI_BUFFER_TOO_SMALL) ? NULL : *Progress
));
return Status;
}
//
// the "write" step in RMW
//
Status = FormStateToPlatformConfig (&MainFormState);
if (EFI_ERROR (Status)) {
*Progress = Configuration;
}
return Status;
}
STATIC
EFI_STATUS
EFIAPI
Callback (
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN EFI_BROWSER_ACTION Action,
IN EFI_QUESTION_ID QuestionId,
IN UINT8 Type,
IN OUT EFI_IFR_TYPE_VALUE *Value,
OUT EFI_BROWSER_ACTION_REQUEST *ActionRequest
)
{
DEBUG ((
DEBUG_VERBOSE,
"%a: Action=0x%Lx QuestionId=%d Type=%d\n",
__func__,
(UINT64)Action,
QuestionId,
Type
));
if (Action != EFI_BROWSER_ACTION_CHANGED) {
return EFI_UNSUPPORTED;
}
switch (QuestionId) {
case QUESTION_SAVE_EXIT:
*ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;
break;
case QUESTION_DISCARD_EXIT:
*ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;
break;
default:
break;
}
return EFI_SUCCESS;
}
/**
Query and save all resolutions supported by the GOP.
@param[in] Gop The Graphics Output Protocol instance to query.
@param[out] NumGopModes The number of modes supported by the GOP. On output,
this parameter will be positive.
@param[out] GopModes On output, a dynamically allocated array containing
the resolutions returned by the GOP. The caller is
responsible for freeing the array after use.
@retval EFI_UNSUPPORTED No modes found.
@retval EFI_OUT_OF_RESOURCES Failed to allocate GopModes.
@return Error codes from Gop->QueryMode().
**/
STATIC
EFI_STATUS
EFIAPI
QueryGopModes (
IN EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop,
OUT UINTN *NumGopModes,
OUT GOP_MODE **GopModes
)
{
EFI_STATUS Status;
UINT32 ModeNumber;
if (Gop->Mode->MaxMode == 0) {
return EFI_UNSUPPORTED;
}
*NumGopModes = Gop->Mode->MaxMode;
*GopModes = AllocatePool (Gop->Mode->MaxMode * sizeof **GopModes);
if (*GopModes == NULL) {
return EFI_OUT_OF_RESOURCES;
}
for (ModeNumber = 0; ModeNumber < Gop->Mode->MaxMode; ++ModeNumber) {
EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *Info;
UINTN SizeOfInfo;
Status = Gop->QueryMode (Gop, ModeNumber, &SizeOfInfo, &Info);
if (EFI_ERROR (Status)) {
goto FreeGopModes;
}
(*GopModes)[ModeNumber].X = Info->HorizontalResolution;
(*GopModes)[ModeNumber].Y = Info->VerticalResolution;
FreePool (Info);
}
return EFI_SUCCESS;
FreeGopModes:
FreePool (*GopModes);
return Status;
}
/**
Create a set of "one-of-many" (ie. "drop down list") option IFR opcodes,
based on available GOP resolutions, to be placed under a "one-of-many" (ie.
"drop down list") opcode.
@param[in] PackageList The package list with the formset and form for
which the drop down options are produced. Option
names are added as new strings to PackageList.
@param[out] OpCodeBuffer On output, a dynamically allocated opcode buffer
with drop down list options corresponding to GOP
resolutions. The caller is responsible for freeing
OpCodeBuffer with HiiFreeOpCodeHandle() after use.
@param[in] NumGopModes Number of entries in GopModes.
@param[in] GopModes Array of resolutions retrieved from the GOP.
@retval EFI_SUCESS Opcodes have been successfully produced.
@return Status codes from underlying functions. PackageList may
have been extended with new strings. OpCodeBuffer is
unchanged.
**/
STATIC
EFI_STATUS
EFIAPI
CreateResolutionOptions (
IN EFI_HII_HANDLE PackageList,
OUT VOID **OpCodeBuffer,
IN UINTN NumGopModes,
IN GOP_MODE *GopModes
)
{
EFI_STATUS Status;
VOID *OutputBuffer;
UINTN ModeNumber;
OutputBuffer = HiiAllocateOpCodeHandle ();
if (OutputBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
for (ModeNumber = 0; ModeNumber < NumGopModes; ++ModeNumber) {
CHAR16 Desc[MAXSIZE_RES_CUR];
EFI_STRING_ID NewString;
VOID *OpCode;
UnicodeSPrintAsciiFormat (
Desc,
sizeof Desc,
"%Ldx%Ld",
(INT64)GopModes[ModeNumber].X,
(INT64)GopModes[ModeNumber].Y
);
NewString = HiiSetString (
PackageList,
0 /* new string */,
Desc,
NULL /* for all languages */
);
if (NewString == 0) {
Status = EFI_OUT_OF_RESOURCES;
goto FreeOutputBuffer;
}
OpCode = HiiCreateOneOfOptionOpCode (
OutputBuffer,
NewString,
0 /* Flags */,
EFI_IFR_NUMERIC_SIZE_4,
ModeNumber
);
if (OpCode == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto FreeOutputBuffer;
}
}
*OpCodeBuffer = OutputBuffer;
return EFI_SUCCESS;
FreeOutputBuffer:
HiiFreeOpCodeHandle (OutputBuffer);
return Status;
}
/**
Populate the form identified by the (PackageList, FormSetGuid, FormId)
triplet.
The drop down list of video resolutions is generated from (NumGopModes,
GopModes).
@retval EFI_SUCESS Form successfully updated.
@return Status codes from underlying functions.
**/
STATIC
EFI_STATUS
EFIAPI
PopulateForm (
IN EFI_HII_HANDLE PackageList,
IN EFI_GUID *FormSetGuid,
IN EFI_FORM_ID FormId,
IN UINTN NumGopModes,
IN GOP_MODE *GopModes
)
{
EFI_STATUS Status;
VOID *OpCodeBuffer;
VOID *OpCode;
EFI_IFR_GUID_LABEL *Anchor;
VOID *OpCodeBuffer2;
OpCodeBuffer2 = NULL;
//
// 1. Allocate an empty opcode buffer.
//
OpCodeBuffer = HiiAllocateOpCodeHandle ();
if (OpCodeBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// 2. Create a label opcode (which is a Tiano extension) inside the buffer.
// The label's number must match the "anchor" label in the form.
//
OpCode = HiiCreateGuidOpCode (
OpCodeBuffer,
&gEfiIfrTianoGuid,
NULL /* optional copy origin */,
sizeof *Anchor
);
if (OpCode == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto FreeOpCodeBuffer;
}
Anchor = OpCode;
Anchor->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
Anchor->Number = LABEL_RES_NEXT;
//
// 3. Create the opcodes inside the buffer that are to be inserted into the
// form.
//
// 3.1. Get a list of resolutions.
//
Status = CreateResolutionOptions (
PackageList,
&OpCodeBuffer2,
NumGopModes,
GopModes
);
if (EFI_ERROR (Status)) {
goto FreeOpCodeBuffer;
}
//
// 3.2. Create a one-of-many question with the above options.
//
OpCode = HiiCreateOneOfOpCode (
OpCodeBuffer, // create opcode inside this
// opcode buffer,
QUESTION_RES_NEXT, // ID of question,
FORMSTATEID_MAIN_FORM, // identifies form state
// storage,
(UINT16)OFFSET_OF (
MAIN_FORM_STATE, // value of question stored
NextPreferredResolution
), // at this offset,
STRING_TOKEN (STR_RES_NEXT), // Prompt,
STRING_TOKEN (STR_RES_NEXT_HELP), // Help,
0, // QuestionFlags,
EFI_IFR_NUMERIC_SIZE_4, // see sizeof
// NextPreferredResolution,
OpCodeBuffer2, // buffer with possible
// choices,
NULL // DEFAULT opcodes
);
if (OpCode == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto FreeOpCodeBuffer2;
}
//
// 4. Update the form with the opcode buffer.
//
Status = HiiUpdateForm (
PackageList,
FormSetGuid,
FormId,
OpCodeBuffer, // buffer with head anchor, and new contents to be
// inserted at it
NULL // buffer with tail anchor, for deleting old
// contents up to it
);
FreeOpCodeBuffer2:
HiiFreeOpCodeHandle (OpCodeBuffer2);
FreeOpCodeBuffer:
HiiFreeOpCodeHandle (OpCodeBuffer);
return Status;
}
/**
Load and execute the platform configuration.
@retval EFI_SUCCESS Configuration loaded and executed.
@return Status codes from PlatformConfigLoad().
**/
STATIC
EFI_STATUS
EFIAPI
ExecutePlatformConfig (
VOID
)
{
EFI_STATUS Status;
PLATFORM_CONFIG PlatformConfig;
UINT64 OptionalElements;
RETURN_STATUS PcdStatus;
Status = PlatformConfigLoad (&PlatformConfig, &OptionalElements);
if (EFI_ERROR (Status)) {
DEBUG ((
(Status == EFI_NOT_FOUND) ? DEBUG_VERBOSE : DEBUG_ERROR,
"%a: failed to load platform config: %r\n",
__func__,
Status
));
return Status;
}
if (OptionalElements & PLATFORM_CONFIG_F_GRAPHICS_RESOLUTION) {
//
// Pass the preferred resolution to GraphicsConsoleDxe via dynamic PCDs.
//
PcdStatus = PcdSet32S (
PcdVideoHorizontalResolution,
PlatformConfig.HorizontalResolution
);
ASSERT_RETURN_ERROR (PcdStatus);
PcdStatus = PcdSet32S (
PcdVideoVerticalResolution,
PlatformConfig.VerticalResolution
);
ASSERT_RETURN_ERROR (PcdStatus);
PcdStatus = PcdSet8S (PcdVideoResolutionSource, 1);
ASSERT_RETURN_ERROR (PcdStatus);
}
return EFI_SUCCESS;
}
/**
Notification callback for GOP interface installation.
@param[in] Event Event whose notification function is being invoked.
@param[in] Context The pointer to the notification function's context, which
is implementation-dependent.
**/
STATIC
VOID
EFIAPI
GopInstalled (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
EFI_GRAPHICS_OUTPUT_PROTOCOL *Gop;
ASSERT (Event == mGopEvent);
//
// Check further GOPs.
//
for ( ; ;) {
mNumGopModes = 0;
mGopModes = NULL;
Status = gBS->LocateProtocol (
&gEfiGraphicsOutputProtocolGuid,
mGopTracker,
(VOID **)&Gop
);
if (EFI_ERROR (Status)) {
return;
}
Status = QueryGopModes (Gop, &mNumGopModes, &mGopModes);
if (EFI_ERROR (Status)) {
continue;
}
Status = PopulateForm (
mInstalledPackages,
&gOvmfPlatformConfigGuid,
FORMID_MAIN_FORM,
mNumGopModes,
mGopModes
);
if (EFI_ERROR (Status)) {
FreePool (mGopModes);
continue;
}
break;
}
//
// Success -- so uninstall this callback. Closing the event removes all
// pending notifications and all protocol registrations.
//
Status = gBS->CloseEvent (mGopEvent);
ASSERT_EFI_ERROR (Status);
mGopEvent = NULL;
mGopTracker = NULL;
}
/**
Entry point for this driver.
@param[in] ImageHandle Image handle of this driver.
@param[in] SystemTable Pointer to SystemTable.
@retval EFI_SUCESS Driver has loaded successfully.
@retval EFI_OUT_OF_RESOURCES Failed to install HII packages.
@return Error codes from lower level functions.
**/
EFI_STATUS
EFIAPI
PlatformInit (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
ExecutePlatformConfig ();
mConfigAccess.ExtractConfig = &ExtractConfig;
mConfigAccess.RouteConfig = &RouteConfig;
mConfigAccess.Callback = &Callback;
//
// Declare ourselves suitable for HII communication.
//
Status = gBS->InstallMultipleProtocolInterfaces (
&ImageHandle,
&gEfiDevicePathProtocolGuid,
&mPkgDevicePath,
&gEfiHiiConfigAccessProtocolGuid,
&mConfigAccess,
NULL
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Save the driver image handle.
//
mImageHandle = ImageHandle;
//
// Publish the HII package list to HII Database.
//
mInstalledPackages = HiiAddPackages (
&gEfiCallerIdGuid, // PackageListGuid
ImageHandle, // associated DeviceHandle
PlatformDxeStrings, // 1st package
PlatformFormsBin, // 2nd package
NULL // terminator
);
if (mInstalledPackages == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto UninstallProtocols;
}
Status = gBS->CreateEvent (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
&GopInstalled,
NULL /* Context */,
&mGopEvent
);
if (EFI_ERROR (Status)) {
goto RemovePackages;
}
Status = gBS->RegisterProtocolNotify (
&gEfiGraphicsOutputProtocolGuid,
mGopEvent,
&mGopTracker
);
if (EFI_ERROR (Status)) {
goto CloseGopEvent;
}
//
// Check already installed GOPs.
//
Status = gBS->SignalEvent (mGopEvent);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
CloseGopEvent:
gBS->CloseEvent (mGopEvent);
RemovePackages:
HiiRemovePackages (mInstalledPackages);
UninstallProtocols:
gBS->UninstallMultipleProtocolInterfaces (
ImageHandle,
&gEfiDevicePathProtocolGuid,
&mPkgDevicePath,
&gEfiHiiConfigAccessProtocolGuid,
&mConfigAccess,
NULL
);
return Status;
}
/**
Unload the driver.
@param[in] ImageHandle Handle that identifies the image to evict.
@retval EFI_SUCCESS The image has been unloaded.
**/
EFI_STATUS
EFIAPI
PlatformUnload (
IN EFI_HANDLE ImageHandle
)
{
if (mGopEvent == NULL) {
//
// The GOP callback ran successfully and unregistered itself. Release the
// resources allocated there.
//
ASSERT (mGopModes != NULL);
FreePool (mGopModes);
} else {
//
// Otherwise we need to unregister the callback.
//
ASSERT (mGopModes == NULL);
gBS->CloseEvent (mGopEvent);
}
//
// Release resources allocated by the entry point.
//
HiiRemovePackages (mInstalledPackages);
gBS->UninstallMultipleProtocolInterfaces (
ImageHandle,
&gEfiDevicePathProtocolGuid,
&mPkgDevicePath,
&gEfiHiiConfigAccessProtocolGuid,
&mConfigAccess,
NULL
);
return EFI_SUCCESS;
}
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