diff options
Diffstat (limited to 'OvmfPkg/XenPvBlkDxe/BlockIo.c')
| -rw-r--r-- | OvmfPkg/XenPvBlkDxe/BlockIo.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/OvmfPkg/XenPvBlkDxe/BlockIo.c b/OvmfPkg/XenPvBlkDxe/BlockIo.c deleted file mode 100644 index ae6aa62ac0..0000000000 --- a/OvmfPkg/XenPvBlkDxe/BlockIo.c +++ /dev/null @@ -1,276 +0,0 @@ -/** @file
- BlockIo implementation for Xen PV Block driver.
-
- This file is implementing the interface between the actual driver in
- BlockFront.c to the BlockIo protocol.
-
- Copyright (C) 2014, Citrix Ltd.
-
- 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 "XenPvBlkDxe.h"
-
-#include "BlockFront.h"
-
-///
-/// Block I/O Media structure
-///
-GLOBAL_REMOVE_IF_UNREFERENCED
-EFI_BLOCK_IO_MEDIA gXenPvBlkDxeBlockIoMedia = {
- 0, // MediaId
- FALSE, // RemovableMedia
- FALSE, // MediaPresent
- FALSE, // LogicalPartition
- TRUE, // ReadOnly
- FALSE, // WriteCaching
- 512, // BlockSize
- 512, // IoAlign, BlockFront does not support less than 512 bits-aligned.
- 0, // LastBlock
- 0, // LowestAlignedLba
- 0, // LogicalBlocksPerPhysicalBlock
- 0 // OptimalTransferLengthGranularity
-};
-
-///
-/// Block I/O Protocol instance
-///
-GLOBAL_REMOVE_IF_UNREFERENCED
-EFI_BLOCK_IO_PROTOCOL gXenPvBlkDxeBlockIo = {
- EFI_BLOCK_IO_PROTOCOL_REVISION3, // Revision
- &gXenPvBlkDxeBlockIoMedia, // Media
- XenPvBlkDxeBlockIoReset, // Reset
- XenPvBlkDxeBlockIoReadBlocks, // ReadBlocks
- XenPvBlkDxeBlockIoWriteBlocks, // WriteBlocks
- XenPvBlkDxeBlockIoFlushBlocks // FlushBlocks
-};
-
-
-
-
-/**
- Read/Write BufferSize bytes from Lba into Buffer.
-
- This function is commun to XenPvBlkDxeBlockIoReadBlocks and
- XenPvBlkDxeBlockIoWriteBlocks.
-
- @param This Indicates a pointer to the calling context.
- @param MediaId Id of the media, changes every time the media is replaced.
- @param Lba The starting Logical Block Address to read from/write to.
- @param BufferSize Size of Buffer, must be a multiple of device block size.
- @param Buffer A pointer to the destination/source buffer for the data.
- @param IsWrite Indicate if the operation is write or read.
-
- @return See description of XenPvBlkDxeBlockIoReadBlocks and
- XenPvBlkDxeBlockIoWriteBlocks.
-**/
-STATIC
-EFI_STATUS
-XenPvBlkDxeBlockIoReadWriteBlocks (
- IN EFI_BLOCK_IO_PROTOCOL *This,
- IN UINT32 MediaId,
- IN EFI_LBA Lba,
- IN UINTN BufferSize,
- IN OUT VOID *Buffer,
- IN BOOLEAN IsWrite
- )
-{
- XEN_BLOCK_FRONT_IO IoData;
- EFI_BLOCK_IO_MEDIA *Media = This->Media;
- UINTN Sector;
- EFI_STATUS Status;
-
- if (Buffer == NULL) {
- return EFI_INVALID_PARAMETER;
- }
- if (BufferSize == 0) {
- return EFI_SUCCESS;
- }
-
- if (BufferSize % Media->BlockSize != 0) {
- DEBUG ((EFI_D_ERROR, "XenPvBlkDxe: Bad buffer size: 0x%Lx\n",
- (UINT64)BufferSize));
- return EFI_BAD_BUFFER_SIZE;
- }
-
- if (Lba > Media->LastBlock ||
- (BufferSize / Media->BlockSize) - 1 > Media->LastBlock - Lba) {
- DEBUG ((EFI_D_ERROR,
- "XenPvBlkDxe: %a with invalid LBA: 0x%Lx, size: 0x%Lx\n",
- IsWrite ? "Write" : "Read", Lba, (UINT64)BufferSize));
- return EFI_INVALID_PARAMETER;
- }
-
- if (IsWrite && Media->ReadOnly) {
- return EFI_WRITE_PROTECTED;
- }
-
- if ((Media->IoAlign > 1) && (UINTN)Buffer & (Media->IoAlign - 1)) {
- //
- // Grub2 does not appear to respect IoAlign of 512, so reallocate the
- // buffer here.
- //
- VOID *NewBuffer;
-
- //
- // Try again with a properly aligned buffer.
- //
- NewBuffer = AllocateAlignedPages((BufferSize + EFI_PAGE_SIZE) / EFI_PAGE_SIZE,
- Media->IoAlign);
- if (!IsWrite) {
- Status = XenPvBlkDxeBlockIoReadBlocks (This, MediaId,
- Lba, BufferSize, NewBuffer);
- CopyMem (Buffer, NewBuffer, BufferSize);
- } else {
- CopyMem (NewBuffer, Buffer, BufferSize);
- Status = XenPvBlkDxeBlockIoWriteBlocks (This, MediaId,
- Lba, BufferSize, NewBuffer);
- }
- FreeAlignedPages (NewBuffer, (BufferSize + EFI_PAGE_SIZE) / EFI_PAGE_SIZE);
- return Status;
- }
-
- IoData.Dev = XEN_BLOCK_FRONT_FROM_BLOCK_IO (This);
- Sector = (UINTN)MultU64x32 (Lba, Media->BlockSize / 512);
-
- while (BufferSize > 0) {
- if (((UINTN)Buffer & EFI_PAGE_MASK) == 0) {
- IoData.Size = MIN (BLKIF_MAX_SEGMENTS_PER_REQUEST * EFI_PAGE_SIZE,
- BufferSize);
- } else {
- IoData.Size = MIN ((BLKIF_MAX_SEGMENTS_PER_REQUEST - 1) * EFI_PAGE_SIZE,
- BufferSize);
- }
-
- IoData.Buffer = Buffer;
- IoData.Sector = Sector;
- BufferSize -= IoData.Size;
- Buffer = (VOID*) ((UINTN) Buffer + IoData.Size);
- Sector += IoData.Size / 512;
- Status = XenPvBlockIo (&IoData, IsWrite);
- if (EFI_ERROR (Status)) {
- DEBUG ((EFI_D_ERROR, "XenPvBlkDxe: Error durring %a operation.\n",
- IsWrite ? "write" : "read"));
- return Status;
- }
- }
- return EFI_SUCCESS;
-}
-
-
-/**
- Read BufferSize bytes from Lba into Buffer.
-
- @param This Indicates a pointer to the calling context.
- @param MediaId Id of the media, changes every time the media is replaced.
- @param Lba The starting Logical Block Address to read from
- @param BufferSize Size of Buffer, must be a multiple of device block size.
- @param 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
-XenPvBlkDxeBlockIoReadBlocks (
- IN EFI_BLOCK_IO_PROTOCOL *This,
- IN UINT32 MediaId,
- IN EFI_LBA Lba,
- IN UINTN BufferSize,
- OUT VOID *Buffer
- )
-{
- return XenPvBlkDxeBlockIoReadWriteBlocks (This,
- MediaId, Lba, BufferSize, Buffer, FALSE);
-}
-
-/**
- Write BufferSize bytes from Lba into Buffer.
-
- @param This Indicates a pointer to the calling context.
- @param MediaId The media ID that the write request is for.
- @param Lba The starting logical block address to be written. The caller is
- responsible for writing to only legitimate locations.
- @param BufferSize Size of Buffer, must be a multiple of device block size.
- @param 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
-XenPvBlkDxeBlockIoWriteBlocks (
- IN EFI_BLOCK_IO_PROTOCOL *This,
- IN UINT32 MediaId,
- IN EFI_LBA Lba,
- IN UINTN BufferSize,
- IN VOID *Buffer
- )
-{
- return XenPvBlkDxeBlockIoReadWriteBlocks (This,
- MediaId, Lba, BufferSize, Buffer, TRUE);
-}
-
-/**
- Flush the Block Device.
-
- @param 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
-XenPvBlkDxeBlockIoFlushBlocks (
- IN EFI_BLOCK_IO_PROTOCOL *This
- )
-{
- XenPvBlockSync (XEN_BLOCK_FRONT_FROM_BLOCK_IO (This));
- return EFI_SUCCESS;
-}
-
-/**
- Reset the block device hardware.
-
- @param[in] This Indicates a pointer to the calling context.
- @param[in] ExtendedVerification Not used.
-
- @retval EFI_SUCCESS The device was reset.
-
-**/
-EFI_STATUS
-EFIAPI
-XenPvBlkDxeBlockIoReset (
- IN EFI_BLOCK_IO_PROTOCOL *This,
- IN BOOLEAN ExtendedVerification
- )
-{
- //
- // Since the initialization of the devices is done, then the device is
- // working correctly.
- //
- return EFI_SUCCESS;
-}
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