Data Structures | |
struct | EFI_BLOCK_IO2_TOKEN |
struct | _EFI_BLOCK_IO2_PROTOCOL |
Defines | |
#define | EFI_BLOCK_IO2_PROTOCOL_GUID |
Typedefs | |
typedef struct _EFI_BLOCK_IO2_PROTOCOL | EFI_BLOCK_IO2_PROTOCOL |
typedef IN BOOLEAN | ExtendedVerification |
typedef IN UINT32 | MediaId |
typedef IN UINT32 IN EFI_LBA | LBA |
typedef IN UINT32 IN EFI_LBA IN OUT EFI_BLOCK_IO2_TOKEN * | Token |
typedef IN UINT32 IN EFI_LBA IN OUT EFI_BLOCK_IO2_TOKEN IN UINTN | BufferSize |
typedef IN UINT32 IN EFI_LBA IN OUT EFI_BLOCK_IO2_TOKEN IN UINTN OUT VOID * | Buffer |
Functions | |
typedef | EFI_STATUS (EFIAPI *EFI_BLOCK_RESET_EX)(IN EFI_BLOCK_IO2_PROTOCOL *This |
Variables | |
EFI_GUID | gEfiBlockIo2ProtocolGuid |
The Block IO2 protocol defines an extension to the Block IO protocol which enables the ability to read and write data at a block level in a non-blocking manner.
Copyright (c) 2011, Intel Corporation. All rights reserved.
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.
#define EFI_BLOCK_IO2_PROTOCOL_GUID |
Value:
{ \ 0xa77b2472, 0xe282, 0x4e9f, {0xa2, 0x45, 0xc2, 0xc0, 0xe2, 0x7b, 0xbc, 0xc1} \ }
typedef IN UINT8 IN EFI_USBFN_ENDPOINT_DIRECTION IN EFI_USBFN_POLICY_TYPE IN OUT UINTN IN OUT VOID * Buffer |
typedef IN UINT8 IN EFI_USBFN_ENDPOINT_DIRECTION IN EFI_USBFN_POLICY_TYPE IN OUT UINTN * BufferSize |
typedef struct _EFI_BLOCK_IO2_PROTOCOL EFI_BLOCK_IO2_PROTOCOL |
typedef IN BOOLEAN ExtendedVerification |
typedef IN OUT EFI_FILE_IO_TOKEN * Token |
typedef EFI_STATUS | ( | EFIAPI * | EFI_BLOCK_FLUSH_EX | ) |
Reset the block device hardware.
[in] | This | Indicates a pointer to the calling context. |
[in] | ExtendedVerification | Indicates that the driver may perform a more exhausive verfication operation of the device during reset. |
EFI_SUCCESS | The device was reset. | |
EFI_DEVICE_ERROR | The device is not functioning properly and could not be reset. |
This function reads the requested number of blocks from the device. All the blocks are read, or an error is returned. If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and non-blocking I/O is being used, the Event associated with this request will not be signaled.
[in] | This | Indicates a pointer to the calling context. |
[in] | MediaId | Id of the media, changes every time the media is replaced. |
[in] | Lba | The starting Logical Block Address to read from. |
[in,out] | Token | A pointer to the token associated with the transaction. |
[in] | BufferSize | Size of Buffer, must be a multiple of device block size. |
[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. |
EFI_SUCCESS | The read request was queued if Token->Event is not NULL.The data was read correctly from the device if the Token->Event is NULL. | |
EFI_DEVICE_ERROR | The device reported an error while performing the read. | |
EFI_NO_MEDIA | There is no media in the device. | |
EFI_MEDIA_CHANGED | The MediaId is not for the current media. | |
EFI_BAD_BUFFER_SIZE | The BufferSize parameter is not a multiple of the intrinsic block size of the device. | |
EFI_INVALID_PARAMETER | The read request contains LBAs that are not valid, or the buffer is not on proper alignment. | |
EFI_OUT_OF_RESOURCES | The request could not be completed due to a lack of resources. |
This function writes the requested number of blocks to the device. All blocks are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA, EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is being used, the Event associated with this request will not be signaled.
[in] | This | Indicates a pointer to the calling context. |
[in] | MediaId | The media ID that the write request is for. |
[in] | Lba | The starting logical block address to be written. The caller is responsible for writing to only legitimate locations. |
[in,out] | Token | A pointer to the token associated with the transaction. |
[in] | BufferSize | Size of Buffer, must be a multiple of device block size. |
[in] | Buffer | A pointer to the source buffer for the data. |
EFI_SUCCESS | The write request was queued if Event is not NULL. The data was written correctly to the device if the Event is NULL. | |
EFI_WRITE_PROTECTED | The device can not be written to. | |
EFI_NO_MEDIA | There is no media in the device. | |
EFI_MEDIA_CHNAGED | The MediaId does not matched the current device. | |
EFI_DEVICE_ERROR | The device reported an error while performing the write. | |
EFI_BAD_BUFFER_SIZE | The Buffer was not a multiple of the block size of the device. | |
EFI_INVALID_PARAMETER | The write request contains LBAs that are not valid, or the buffer is not on proper alignment. | |
EFI_OUT_OF_RESOURCES | The request could not be completed due to a lack of resources. |
If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is being used, the Event associated with this request will not be signaled.
[in] | This | Indicates a pointer to the calling context. |
[in,out] | Token | A pointer to the token associated with the transaction |
EFI_SUCCESS | The flush request was queued if Event is not NULL. All outstanding data was written correctly to the device if the Event is NULL. | |
EFI_DEVICE_ERROR | The device reported an error while writting back the data. | |
EFI_WRITE_PROTECTED | The device cannot be written to. | |
EFI_NO_MEDIA | There is no media in the device. | |
EFI_MEDIA_CHANGED | The MediaId is not for the current media. | |
EFI_OUT_OF_RESOURCES | The request could not be completed due to a lack of resources. |