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OvmfPkg: Separate QemuFwCfgLibMmio.c into two files 

Separate QemuFwCfgLibMmio.c into two files named QemuFwCfgLibMmio.c and
QemuFwCfgLibMmioDxe.c, added a new header named
QemuFwCfgLibMmioInternal.h for MMIO version.

Some DXE stage variables became non-static in this patch, they will be
restored to static in the next patch.

Build-tested only (with "ArmVirtQemu.dsc and RiscVVirtQemu.dsc").

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4755

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Cc: Sunil V L <sunilvl@ventanamicro.com>
Cc: Andrei Warkentin <andrei.warkentin@intel.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
This commit is contained in:
Chao Li 2024-04-30 15:48:02 +08:00 committed by mergify[bot]
parent e942b85a21
commit 5e31c5666d
4 changed files with 327 additions and 186 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

192
OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.c
View File

@ -1,7 +1,5 @@
/** @file
Stateful and implicitly initialized fw_cfg library implementation.
Copyright (C) 2013 - 2014, Red Hat, Inc.
Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
@ -20,63 +18,14 @@
#include <Protocol/FdtClient.h>
STATIC UINTN mFwCfgSelectorAddress;
STATIC UINTN mFwCfgDataAddress;
STATIC UINTN mFwCfgDmaAddress;
/**
Reads firmware configuration bytes into a buffer
@param[in] Size Size in bytes to read
@param[in] Buffer Buffer to store data into (OPTIONAL if Size is 0)
**/
typedef
VOID(EFIAPI READ_BYTES_FUNCTION)(
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Writes bytes from a buffer to firmware configuration
@param[in] Size Size in bytes to write
@param[in] Buffer Buffer to transfer data from (OPTIONAL if Size is 0)
**/
typedef
VOID(EFIAPI WRITE_BYTES_FUNCTION)(
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Skips bytes in firmware configuration
@param[in] Size Size in bytes to skip
**/
typedef
VOID(EFIAPI SKIP_BYTES_FUNCTION)(
IN UINTN Size
);
//
// Forward declaration of the two implementations we have.
//
STATIC READ_BYTES_FUNCTION MmioReadBytes;
STATIC WRITE_BYTES_FUNCTION MmioWriteBytes;
STATIC SKIP_BYTES_FUNCTION MmioSkipBytes;
STATIC READ_BYTES_FUNCTION DmaReadBytes;
STATIC WRITE_BYTES_FUNCTION DmaWriteBytes;
STATIC SKIP_BYTES_FUNCTION DmaSkipBytes;
#include "QemuFwCfgLibMmioInternal.h"
//
// These correspond to the implementation we detect at runtime.
//
STATIC READ_BYTES_FUNCTION *InternalQemuFwCfgReadBytes = MmioReadBytes;
STATIC WRITE_BYTES_FUNCTION *InternalQemuFwCfgWriteBytes = MmioWriteBytes;
STATIC SKIP_BYTES_FUNCTION *InternalQemuFwCfgSkipBytes = MmioSkipBytes;
READ_BYTES_FUNCTION *InternalQemuFwCfgReadBytes = MmioReadBytes;
WRITE_BYTES_FUNCTION *InternalQemuFwCfgWriteBytes = MmioWriteBytes;
SKIP_BYTES_FUNCTION *InternalQemuFwCfgSkipBytes = MmioSkipBytes;
/**
Returns a boolean indicating if the firmware configuration interface
@ -97,126 +46,6 @@ QemuFwCfgIsAvailable (
return (BOOLEAN)(mFwCfgSelectorAddress != 0 && mFwCfgDataAddress != 0);
}
RETURN_STATUS
EFIAPI
QemuFwCfgInitialize (
VOID
)
{
EFI_STATUS Status;
FDT_CLIENT_PROTOCOL *FdtClient;
CONST UINT64 *Reg;
UINT32 RegSize;
UINTN AddressCells, SizeCells;
UINT64 FwCfgSelectorAddress;
UINT64 FwCfgSelectorSize;
UINT64 FwCfgDataAddress;
UINT64 FwCfgDataSize;
UINT64 FwCfgDmaAddress;
UINT64 FwCfgDmaSize;
Status = gBS->LocateProtocol (
&gFdtClientProtocolGuid,
NULL,
(VOID **)&FdtClient
);
ASSERT_EFI_ERROR (Status);
Status = FdtClient->FindCompatibleNodeReg (
FdtClient,
"qemu,fw-cfg-mmio",
(CONST VOID **)&Reg,
&AddressCells,
&SizeCells,
&RegSize
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_WARN,
"%a: No 'qemu,fw-cfg-mmio' compatible DT node found (Status == %r)\n",
__func__,
Status
));
return EFI_SUCCESS;
}
ASSERT (AddressCells == 2);
ASSERT (SizeCells == 2);
ASSERT (RegSize == 2 * sizeof (UINT64));
FwCfgDataAddress = SwapBytes64 (Reg[0]);
FwCfgDataSize = 8;
FwCfgSelectorAddress = FwCfgDataAddress + FwCfgDataSize;
FwCfgSelectorSize = 2;
//
// The following ASSERT()s express
//
// Address + Size - 1 <= MAX_UINTN
//
// for both registers, that is, that the last byte in each MMIO range is
// expressible as a MAX_UINTN. The form below is mathematically
// equivalent, and it also prevents any unsigned overflow before the
// comparison.
//
ASSERT (FwCfgSelectorAddress <= MAX_UINTN - FwCfgSelectorSize + 1);
ASSERT (FwCfgDataAddress <= MAX_UINTN - FwCfgDataSize + 1);
mFwCfgSelectorAddress = FwCfgSelectorAddress;
mFwCfgDataAddress = FwCfgDataAddress;
DEBUG ((
DEBUG_INFO,
"Found FwCfg @ 0x%Lx/0x%Lx\n",
FwCfgSelectorAddress,
FwCfgDataAddress
));
if (SwapBytes64 (Reg[1]) >= 0x18) {
FwCfgDmaAddress = FwCfgDataAddress + 0x10;
FwCfgDmaSize = 0x08;
//
// See explanation above.
//
ASSERT (FwCfgDmaAddress <= MAX_UINTN - FwCfgDmaSize + 1);
DEBUG ((DEBUG_INFO, "Found FwCfg DMA @ 0x%Lx\n", FwCfgDmaAddress));
} else {
FwCfgDmaAddress = 0;
}
if (QemuFwCfgIsAvailable ()) {
UINT32 Signature;
QemuFwCfgSelectItem (QemuFwCfgItemSignature);
Signature = QemuFwCfgRead32 ();
if (Signature == SIGNATURE_32 ('Q', 'E', 'M', 'U')) {
//
// For DMA support, we require the DTB to advertise the register, and the
// feature bitmap (which we read without DMA) to confirm the feature.
//
if (FwCfgDmaAddress != 0) {
UINT32 Features;
QemuFwCfgSelectItem (QemuFwCfgItemInterfaceVersion);
Features = QemuFwCfgRead32 ();
if ((Features & FW_CFG_F_DMA) != 0) {
mFwCfgDmaAddress = FwCfgDmaAddress;
InternalQemuFwCfgReadBytes = DmaReadBytes;
InternalQemuFwCfgWriteBytes = DmaWriteBytes;
InternalQemuFwCfgSkipBytes = DmaSkipBytes;
}
}
} else {
mFwCfgSelectorAddress = 0;
mFwCfgDataAddress = 0;
}
}
return RETURN_SUCCESS;
}
/**
Selects a firmware configuration item for reading.
@ -240,7 +69,6 @@ QemuFwCfgSelectItem (
/**
Slow READ_BYTES_FUNCTION.
**/
STATIC
VOID
EFIAPI
MmioReadBytes (
@ -252,7 +80,7 @@ MmioReadBytes (
UINT8 *Ptr;
UINT8 *End;
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_RISCV64)
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_RISCV64) || defined (MDE_CPU_LOONGARCH64)
Left = Size & 7;
#else
Left = Size & 3;
@ -262,7 +90,7 @@ MmioReadBytes (
Ptr = Buffer;
End = Ptr + Size;
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_RISCV64)
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_RISCV64) || defined (MDE_CPU_LOONGARCH64)
while (Ptr < End) {
*(UINT64 *)Ptr = MmioRead64 (mFwCfgDataAddress);
Ptr += 8;
@ -306,7 +134,6 @@ MmioReadBytes (
FW_CFG_DMA_CTL_READ - read from fw_cfg into Buffer.
FW_CFG_DMA_CTL_SKIP - skip bytes in fw_cfg.
**/
STATIC
VOID
DmaTransferBytes (
IN UINTN Size,
@ -340,7 +167,7 @@ DmaTransferBytes (
//
// This will fire off the transfer.
//
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_RISCV64)
#if defined (MDE_CPU_AARCH64) || defined (MDE_CPU_RISCV64) || defined (MDE_CPU_LOONGARCH64)
MmioWrite64 (mFwCfgDmaAddress, SwapBytes64 ((UINT64)&Access));
#else
MmioWrite32 ((UINT32)(mFwCfgDmaAddress + 4), SwapBytes32 ((UINT32)&Access));
@ -365,7 +192,6 @@ DmaTransferBytes (
/**
Fast READ_BYTES_FUNCTION.
**/
STATIC
VOID
EFIAPI
DmaReadBytes (
@ -403,7 +229,6 @@ QemuFwCfgReadBytes (
/**
Slow WRITE_BYTES_FUNCTION.
**/
STATIC
VOID
EFIAPI
MmioWriteBytes (
@ -421,7 +246,6 @@ MmioWriteBytes (
/**
Fast WRITE_BYTES_FUNCTION.
**/
STATIC
VOID
EFIAPI
DmaWriteBytes (
@ -457,7 +281,6 @@ QemuFwCfgWriteBytes (
/**
Slow SKIP_BYTES_FUNCTION.
**/
STATIC
VOID
EFIAPI
MmioSkipBytes (
@ -484,7 +307,6 @@ MmioSkipBytes (
/**
Fast SKIP_BYTES_FUNCTION.
**/
STATIC
VOID
EFIAPI
DmaSkipBytes (

3
OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmio.inf
View File

@ -23,11 +23,12 @@
# The following information is for reference only and not required by the build
# tools.
#
# VALID_ARCHITECTURES = ARM AARCH64 RISCV64
# VALID_ARCHITECTURES = ARM AARCH64 RISCV64 LOONGARCH64
#
[Sources]
QemuFwCfgLibMmio.c
QemuFwCfgMmioDxe.c
[Packages]
MdePkg/MdePkg.dec

173
OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLibMmioInternal.h Normal file
View File

@ -0,0 +1,173 @@
/** @file
Internal interfaces specific to the QemuFwCfgLibMmio instances in OvmfPkg.
Copyright (C) 2016, Red Hat, Inc.
Copyright (C) 2017, Advanced Micro Devices. All rights reserved
Copyright (c) 2024 Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef QEMU_FW_CFG_LIB_MMIO_INTERNAL_H_
#define QEMU_FW_CFG_LIB_MMIO_INTERNAL_H_
extern UINTN mFwCfgSelectorAddress;
extern UINTN mFwCfgDataAddress;
extern UINTN mFwCfgDmaAddress;
/**
Reads firmware configuration bytes into a buffer
@param[in] Size Size in bytes to read
@param[in] Buffer Buffer to store data into (OPTIONAL if Size is 0)
**/
typedef
VOID(EFIAPI READ_BYTES_FUNCTION)(
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Writes bytes from a buffer to firmware configuration
@param[in] Size Size in bytes to write
@param[in] Buffer Buffer to transfer data from (OPTIONAL if Size is 0)
**/
typedef
VOID(EFIAPI WRITE_BYTES_FUNCTION)(
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Skips bytes in firmware configuration
@param[in] Size Size in bytes to skip
**/
typedef
VOID(EFIAPI SKIP_BYTES_FUNCTION)(
IN UINTN Size
);
/**
Reads firmware configuration bytes into a buffer
@param[in] Size Size in bytes to read
@param[in] Buffer Buffer to store data into (OPTIONAL if Size is 0)
**/
extern
VOID (EFIAPI *InternalQemuFwCfgReadBytes)(
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Writes bytes from a buffer to firmware configuration
@param[in] Size Size in bytes to write
@param[in] Buffer Buffer to transfer data from (OPTIONAL if Size is 0)
**/
extern
VOID (EFIAPI *InternalQemuFwCfgWriteBytes)(
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Skips bytes in firmware configuration
@param[in] Size Size in bytes to skip
**/
extern
VOID (EFIAPI *InternalQemuFwCfgSkipBytes)(
IN UINTN Size
);
/**
Slow READ_BYTES_FUNCTION.
**/
VOID
EFIAPI
MmioReadBytes (
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Slow WRITE_BYTES_FUNCTION.
**/
VOID
EFIAPI
MmioWriteBytes (
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Slow SKIP_BYTES_FUNCTION.
**/
VOID
EFIAPI
MmioSkipBytes (
IN UINTN Size
);
/**
Fast READ_BYTES_FUNCTION.
**/
VOID
EFIAPI
DmaReadBytes (
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Fast WRITE_BYTES_FUNCTION.
**/
VOID
EFIAPI
DmaWriteBytes (
IN UINTN Size,
IN VOID *Buffer OPTIONAL
);
/**
Fast SKIP_BYTES_FUNCTION.
**/
VOID
EFIAPI
DmaSkipBytes (
IN UINTN Size
);
/**
Transfer an array of bytes, or skip a number of bytes, using the DMA
interface.
@param[in] Size Size in bytes to transfer or skip.
@param[in,out] Buffer Buffer to read data into or write data from. Ignored,
and may be NULL, if Size is zero, or Control is
FW_CFG_DMA_CTL_SKIP.
@param[in] Control One of the following:
FW_CFG_DMA_CTL_WRITE - write to fw_cfg from Buffer.
FW_CFG_DMA_CTL_READ - read from fw_cfg into Buffer.
FW_CFG_DMA_CTL_SKIP - skip bytes in fw_cfg.
**/
VOID
DmaTransferBytes (
IN UINTN Size,
IN OUT VOID *Buffer OPTIONAL,
IN UINT32 Control
);
#endif

145
OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgMmioDxe.c Normal file
View File

@ -0,0 +1,145 @@
/** @file
Stateful and implicitly initialized fw_cfg library implementation.
Copyright (C) 2013 - 2014, Red Hat, Inc.
Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
(C) Copyright 2021 Hewlett Packard Enterprise Development LP<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/QemuFwCfgLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/FdtClient.h>
#include "QemuFwCfgLibMmioInternal.h"
UINTN mFwCfgSelectorAddress;
UINTN mFwCfgDataAddress;
UINTN mFwCfgDmaAddress;
RETURN_STATUS
EFIAPI
QemuFwCfgInitialize (
VOID
)
{
EFI_STATUS Status;
FDT_CLIENT_PROTOCOL *FdtClient;
CONST UINT64 *Reg;
UINT32 RegSize;
UINTN AddressCells, SizeCells;
UINT64 FwCfgSelectorAddress;
UINT64 FwCfgSelectorSize;
UINT64 FwCfgDataAddress;
UINT64 FwCfgDataSize;
UINT64 FwCfgDmaAddress;
UINT64 FwCfgDmaSize;
Status = gBS->LocateProtocol (
&gFdtClientProtocolGuid,
NULL,
(VOID **)&FdtClient
);
ASSERT_EFI_ERROR (Status);
Status = FdtClient->FindCompatibleNodeReg (
FdtClient,
"qemu,fw-cfg-mmio",
(CONST VOID **)&Reg,
&AddressCells,
&SizeCells,
&RegSize
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_WARN,
"%a: No 'qemu,fw-cfg-mmio' compatible DT node found (Status == %r)\n",
__func__,
Status
));
return EFI_SUCCESS;
}
ASSERT (AddressCells == 2);
ASSERT (SizeCells == 2);
ASSERT (RegSize == 2 * sizeof (UINT64));
FwCfgDataAddress = SwapBytes64 (Reg[0]);
FwCfgDataSize = 8;
FwCfgSelectorAddress = FwCfgDataAddress + FwCfgDataSize;
FwCfgSelectorSize = 2;
//
// The following ASSERT()s express
//
// Address + Size - 1 <= MAX_UINTN
//
// for both registers, that is, that the last byte in each MMIO range is
// expressible as a MAX_UINTN. The form below is mathematically
// equivalent, and it also prevents any unsigned overflow before the
// comparison.
//
ASSERT (FwCfgSelectorAddress <= MAX_UINTN - FwCfgSelectorSize + 1);
ASSERT (FwCfgDataAddress <= MAX_UINTN - FwCfgDataSize + 1);
mFwCfgSelectorAddress = FwCfgSelectorAddress;
mFwCfgDataAddress = FwCfgDataAddress;
DEBUG ((
DEBUG_INFO,
"Found FwCfg @ 0x%Lx/0x%Lx\n",
FwCfgSelectorAddress,
FwCfgDataAddress
));
if (SwapBytes64 (Reg[1]) >= 0x18) {
FwCfgDmaAddress = FwCfgDataAddress + 0x10;
FwCfgDmaSize = 0x08;
//
// See explanation above.
//
ASSERT (FwCfgDmaAddress <= MAX_UINTN - FwCfgDmaSize + 1);
DEBUG ((DEBUG_INFO, "Found FwCfg DMA @ 0x%Lx\n", FwCfgDmaAddress));
} else {
FwCfgDmaAddress = 0;
}
if (QemuFwCfgIsAvailable ()) {
UINT32 Signature;
QemuFwCfgSelectItem (QemuFwCfgItemSignature);
Signature = QemuFwCfgRead32 ();
if (Signature == SIGNATURE_32 ('Q', 'E', 'M', 'U')) {
//
// For DMA support, we require the DTB to advertise the register, and the
// feature bitmap (which we read without DMA) to confirm the feature.
//
if (FwCfgDmaAddress != 0) {
UINT32 Features;
QemuFwCfgSelectItem (QemuFwCfgItemInterfaceVersion);
Features = QemuFwCfgRead32 ();
if ((Features & FW_CFG_F_DMA) != 0) {
mFwCfgDmaAddress = FwCfgDmaAddress;
InternalQemuFwCfgReadBytes = DmaReadBytes;
InternalQemuFwCfgWriteBytes = DmaWriteBytes;
InternalQemuFwCfgSkipBytes = DmaSkipBytes;
}
}
} else {
mFwCfgSelectorAddress = 0;
mFwCfgDataAddress = 0;
}
}
return RETURN_SUCCESS;
}