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MdeModulePkg: Add RamDiskDxe driver implementation

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The RamDiskDxe driver will:
1. Produce the EFI RAM Disk Protocol
2. Install RAM disk device path and block I/O related protocols on the
   RAM disk device handle.
3. Install RAM disk configuration form to HII database

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Samer El-Haj-Mahmoud <elhaj@hpe.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
This commit is contained in:
Hao Wu
2016-02-03 14:14:47 +08:00
parent 7b0a1ead7d
commit 20752cb8e7
14 changed files with 2648 additions and 0 deletions
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258
MdeModulePkg/Universal/Disk/RamDiskDxe/RamDiskBlockIo.c Normal file
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/** @file
Produce EFI_BLOCK_IO_PROTOCOL on a RAM disk device.
Copyright (c) 2016, 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 "RamDiskImpl.h"
//
// The EFI_BLOCK_IO_PROTOCOL instances that is installed onto the handle
// for newly registered RAM disks
//
EFI_BLOCK_IO_PROTOCOL mRamDiskBlockIoTemplate = {
EFI_BLOCK_IO_PROTOCOL_REVISION,
(EFI_BLOCK_IO_MEDIA *) 0,
RamDiskBlkIoReset,
RamDiskBlkIoReadBlocks,
RamDiskBlkIoWriteBlocks,
RamDiskBlkIoFlushBlocks
};
/**
Initialize the BlockIO protocol of a RAM disk device.
@param[in] PrivateData Points to RAM disk private data.
**/
VOID
RamDiskInitBlockIo (
IN RAM_DISK_PRIVATE_DATA *PrivateData
)
{
EFI_BLOCK_IO_PROTOCOL *BlockIo;
EFI_BLOCK_IO_MEDIA *Media;
BlockIo = &PrivateData->BlockIo;
Media = &PrivateData->Media;
CopyMem (BlockIo, &mRamDiskBlockIoTemplate, sizeof (EFI_BLOCK_IO_PROTOCOL));
BlockIo->Media = Media;
Media->RemovableMedia = FALSE;
Media->MediaPresent = TRUE;
Media->LogicalPartition = FALSE;
Media->ReadOnly = FALSE;
Media->WriteCaching = FALSE;
Media->BlockSize = RAM_DISK_BLOCK_SIZE;
Media->LastBlock = DivU64x32 (
PrivateData->Size + RAM_DISK_BLOCK_SIZE - 1,
RAM_DISK_BLOCK_SIZE
) - 1;
}
/**
Reset the Block Device.
@param This Indicates a pointer to the calling context.
@param ExtendedVerification Driver may perform diagnostics on reset.
@retval EFI_SUCCESS The device was reset.
@retval EFI_DEVICE_ERROR The device is not functioning properly and could
not be reset.
**/
EFI_STATUS
EFIAPI
RamDiskBlkIoReset (
IN EFI_BLOCK_IO_PROTOCOL *This,
IN BOOLEAN ExtendedVerification
)
{
return EFI_SUCCESS;
}
/**
Read BufferSize bytes from Lba into Buffer.
@param[in] This Indicates a pointer to the calling context.
@param[in] MediaId Id of the media, changes every time the media is
replaced.
@param[in] Lba The starting Logical Block Address to read from.
@param[in] BufferSize Size of Buffer, must be a multiple of device block
size.
@param[out] Buffer A pointer to the destination buffer for the data.
The caller is responsible for either having
implicit or explicit ownership of the buffer.
@retval EFI_SUCCESS The data was read correctly from the device.
@retval EFI_DEVICE_ERROR The device reported an error while performing
the read.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHANGED The MediaId does not matched the current
device.
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block
size of the device.
@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not
valid, or the buffer is not on proper alignment.
**/
EFI_STATUS
EFIAPI
RamDiskBlkIoReadBlocks (
IN EFI_BLOCK_IO_PROTOCOL *This,
IN UINT32 MediaId,
IN EFI_LBA Lba,
IN UINTN BufferSize,
OUT VOID *Buffer
)
{
RAM_DISK_PRIVATE_DATA *PrivateData;
UINTN NumberOfBlocks;
if (Buffer == NULL) {
return EFI_INVALID_PARAMETER;
}
if (BufferSize == 0) {
return EFI_SUCCESS;
}
PrivateData = RAM_DISK_PRIVATE_FROM_BLKIO (This);
if (MediaId != PrivateData->Media.MediaId) {
return EFI_MEDIA_CHANGED;
}
if ((BufferSize % PrivateData->Media.BlockSize) != 0) {
return EFI_BAD_BUFFER_SIZE;
}
if (Lba > PrivateData->Media.LastBlock) {
return EFI_INVALID_PARAMETER;
}
NumberOfBlocks = BufferSize / PrivateData->Media.BlockSize;
if ((Lba + NumberOfBlocks - 1) > PrivateData->Media.LastBlock) {
return EFI_INVALID_PARAMETER;
}
CopyMem (
Buffer,
(VOID *)(UINTN)(PrivateData->StartingAddr + MultU64x32 (Lba, PrivateData->Media.BlockSize)),
BufferSize
);
return EFI_SUCCESS;
}
/**
Write BufferSize bytes from Lba into Buffer.
@param[in] This Indicates a pointer to the calling context.
@param[in] MediaId The media ID that the write request is for.
@param[in] Lba The starting logical block address to be written.
The caller is responsible for writing to only
legitimate locations.
@param[in] BufferSize Size of Buffer, must be a multiple of device block
size.
@param[in] Buffer A pointer to the source buffer for the data.
@retval EFI_SUCCESS The data was written correctly to the device.
@retval EFI_WRITE_PROTECTED The device can not be written to.
@retval EFI_DEVICE_ERROR The device reported an error while performing
the write.
@retval EFI_NO_MEDIA There is no media in the device.
@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current
device.
@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block
size of the device.
@retval EFI_INVALID_PARAMETER The write request contains LBAs that are not
valid, or the buffer is not on proper alignment.
**/
EFI_STATUS
EFIAPI
RamDiskBlkIoWriteBlocks (
IN EFI_BLOCK_IO_PROTOCOL *This,
IN UINT32 MediaId,
IN EFI_LBA Lba,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
RAM_DISK_PRIVATE_DATA *PrivateData;
UINTN NumberOfBlocks;
if (Buffer == NULL) {
return EFI_INVALID_PARAMETER;
}
if (BufferSize == 0) {
return EFI_SUCCESS;
}
PrivateData = RAM_DISK_PRIVATE_FROM_BLKIO (This);
if (MediaId != PrivateData->Media.MediaId) {
return EFI_MEDIA_CHANGED;
}
if (TRUE == PrivateData->Media.ReadOnly) {
return EFI_WRITE_PROTECTED;
}
if ((BufferSize % PrivateData->Media.BlockSize) != 0) {
return EFI_BAD_BUFFER_SIZE;
}
if (Lba > PrivateData->Media.LastBlock) {
return EFI_INVALID_PARAMETER;
}
NumberOfBlocks = BufferSize / PrivateData->Media.BlockSize;
if ((Lba + NumberOfBlocks - 1) > PrivateData->Media.LastBlock) {
return EFI_INVALID_PARAMETER;
}
CopyMem (
(VOID *)(UINTN)(PrivateData->StartingAddr + MultU64x32 (Lba, PrivateData->Media.BlockSize)),
Buffer,
BufferSize
);
return EFI_SUCCESS;
}
/**
Flush the Block Device.
@param[in] This Indicates a pointer to the calling context.
@retval EFI_SUCCESS All outstanding data was written to the device.
@retval EFI_DEVICE_ERROR The device reported an error while writting
back the data
@retval EFI_NO_MEDIA There is no media in the device.
**/
EFI_STATUS
EFIAPI
RamDiskBlkIoFlushBlocks (
IN EFI_BLOCK_IO_PROTOCOL *This
)
{
return EFI_SUCCESS;
}