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OvmfPkg: PlatformDxe: add form widgets for video modes 

In this patch we populate the form with the two widgets related to video
resolution:
- A read-only string field displaying the preference for the next boot.
- A drop-down list offering choices for changing the setting. This list is
  implemented with dynamically generated IFR opcodes.

(In general, the current preference may be missing, or it may be invalid
for the available video RAM size. The list of possible new settings is
filtered with the video RAM size.)

Because the form now becomes able to receive input, we must also implement
ExtractConfig(). This function tells the HII engine about the state of the
widgets.

For now we set up both widgets with static data only:
- The current preference always says "Unset". The driver code is still
  isolated from the backend (the UEFI variable store).
- The list of possible resolutions offers 800x600 only. We don't
  interrogate the GOP yet.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15369 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Laszlo Ersek 2014-03-22 07:13:31 +00:00 committed by jljusten
parent 276a7ea147
commit 92e745505c
5 changed files with 240 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

215
OvmfPkg/PlatformDxe/Platform.c
View File

@ -14,13 +14,18 @@
WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/DevicePathLib.h>
#include <Library/HiiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiHiiServicesLib.h>
#include <Protocol/DevicePath.h>
#include <Protocol/HiiConfigAccess.h>
#include <Guid/MdeModuleHii.h>
#include <Guid/OvmfPlatformConfig.h>
#include "Platform.h"
#include "PlatformConfig.h"
//
@ -94,6 +99,26 @@ extern UINT8 PlatformDxeStrings[];
extern UINT8 PlatformFormsBin[];
/**
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.
@return Status codes from gHiiConfigRouting->BlockToConfig().
**/
STATIC
EFI_STATUS
EFIAPI
@ -104,7 +129,24 @@ ExtractConfig (
OUT EFI_STRING *Results
)
{
return EFI_SUCCESS;
MAIN_FORM_STATE MainFormState;
EFI_STATUS Status;
DEBUG ((EFI_D_VERBOSE, "%a: Request=\"%s\"\n", __FUNCTION__, Request));
StrnCpy ((CHAR16 *) MainFormState.CurrentPreferredResolution,
L"Unset", MAXSIZE_RES_CUR);
MainFormState.NextPreferredResolution = 0;
Status = gHiiConfigRouting->BlockToConfig (gHiiConfigRouting, Request,
(VOID *) &MainFormState, sizeof MainFormState,
Results, Progress);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "%a: BlockToConfig(): %r, Progress=\"%s\"\n",
__FUNCTION__, Status, (Status == EFI_DEVICE_ERROR) ? NULL : *Progress));
} else {
DEBUG ((EFI_D_VERBOSE, "%a: Results=\"%s\"\n", __FUNCTION__, *Results));
}
return Status;
}
@ -137,6 +179,168 @@ Callback (
}
/**
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.
@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
)
{
EFI_STATUS Status;
VOID *OutputBuffer;
EFI_STRING_ID NewString;
VOID *OpCode;
OutputBuffer = HiiAllocateOpCodeHandle ();
if (OutputBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
NewString = HiiSetString (PackageList, 0 /* new string */, L"800x600",
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, 0 /* Value */);
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.
@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
)
{
EFI_STATUS Status;
VOID *OpCodeBuffer;
VOID *OpCode;
EFI_IFR_GUID_LABEL *Anchor;
VOID *OpCodeBuffer2;
//
// 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);
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.
@ -227,8 +431,17 @@ PlatformInit (
goto UninstallProtocols;
}
Status = PopulateForm (mInstalledPackages, &gOvmfPlatformConfigGuid,
FORMID_MAIN_FORM);
if (EFI_ERROR (Status)) {
goto RemovePackages;
}
return EFI_SUCCESS;
RemovePackages:
HiiRemovePackages (mInstalledPackages);
UninstallProtocols:
gBS->UninstallMultipleProtocolInterfaces (ImageHandle,
&gEfiDevicePathProtocolGuid, &mPkgDevicePath,

4
OvmfPkg/PlatformDxe/Platform.h
View File

@ -22,8 +22,12 @@
#define FORMSTATEID_MAIN_FORM 1
#define FORMID_MAIN_FORM 1
#define QUESTION_RES_CUR 1
#define MAXSIZE_RES_CUR 16
#define LABEL_RES_NEXT 1
#define QUESTION_RES_NEXT 2
//
// This structure describes the form state. Its fields relate strictly to the
// visual widgets on the form.

4
OvmfPkg/PlatformDxe/Platform.inf
View File

@ -36,12 +36,14 @@
OvmfPkg/OvmfPkg.dec
[LibraryClasses]
BaseLib
BaseMemoryLib
DebugLib
DevicePathLib
HiiLib
MemoryAllocationLib
UefiBootServicesTableLib
UefiHiiServicesLib
UefiLib
UefiRuntimeServicesTableLib
UefiDriverEntryPoint
@ -55,9 +57,11 @@
gEfiHiiConfigAccessProtocolGuid ## PRODUCES
[Guids]
gEfiIfrTianoGuid
gOvmfPlatformConfigGuid
[Depex]
gEfiHiiConfigRoutingProtocolGuid AND
gEfiHiiDatabaseProtocolGuid AND
gEfiVariableArchProtocolGuid AND
gEfiVariableWriteArchProtocolGuid

BIN
OvmfPkg/PlatformDxe/Platform.uni
View File

Binary file not shown.

18
OvmfPkg/PlatformDxe/PlatformForms.vfr
View File

@ -38,6 +38,24 @@ formset
form
formid = FORMID_MAIN_FORM,
title = STRING_TOKEN(STR_MAIN_FORM_TITLE);
//
// Display the current preference in a read-only string field.
//
string
varid = MainFormState.CurrentPreferredResolution,
questionid = QUESTION_RES_CUR,
prompt = STRING_TOKEN(STR_RES_CUR),
help = STRING_TOKEN(STR_RES_CUR_HELP),
flags = READ_ONLY,
minsize = 0,
maxsize = MAXSIZE_RES_CUR,
endstring;
//
// We'll dynamically generate a one-of-many selection at this label.
//
label LABEL_RES_NEXT;
endform;
endformset;