diff --git a/MdePkg/Include/Protocol/BlockIo2.h b/MdePkg/Include/Protocol/BlockIo2.h new file mode 100644 index 0000000000..6f0c280089 --- /dev/null +++ b/MdePkg/Include/Protocol/BlockIo2.h @@ -0,0 +1,206 @@ +/** @file + Block IO2 protocol as defined in the UEFI 2.3.1 specification. + + 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. + +**/ + +#ifndef __BLOCK_IO2_H__ +#define __BLOCK_IO2_H__ + +#include + +#define EFI_BLOCK_IO2_PROTOCOL_GUID \ + { \ + 0xa77b2472, 0xe282, 0x4e9f, {0xa2, 0x45, 0xc2, 0xc0, 0xe2, 0x7b, 0xbc, 0xc1} \ + } + +typedef struct _EFI_BLOCK_IO2_PROTOCOL EFI_BLOCK_IO2_PROTOCOL; + +/** + The struct of Block IO2 Token. +**/ +typedef struct { + + /// + /// If Event is NULL, then blocking I/O is performed.If Event is not NULL and + /// non-blocking I/O is supported, then non-blocking I/O is performed, and + /// Event will be signaled when the read request is completed. + /// + EFI_EVENT Event; + + /// + /// Defines whether or not the signaled event encountered an error. + /// + EFI_STATUS TransactionStatus; +} EFI_BLOCK_IO2_TOKEN; + + +/** + Reset the block device hardware. + + @param[in] This Indicates a pointer to the calling context. + @param[in] ExtendedVerification Indicates that the driver may perform a more + exhausive verfication operation of the device + during reset. + + @retval EFI_SUCCESS The device was reset. + @retval EFI_DEVICE_ERROR The device is not functioning properly and could + not be reset. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_BLOCK_RESET_EX) ( + IN EFI_BLOCK_IO2_PROTOCOL *This, + IN BOOLEAN ExtendedVerification + ); + +/** + Read BufferSize bytes from Lba into Buffer. + + 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. + + @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, out] Token A pointer to the token associated with the transaction. + @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 read request was queued if Token->Event is + not NULL.The data was read correctly from the + device if the Token->Event is NULL. + @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 is not for the current media. + @retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the + intrinsic 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. + @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack + of resources. +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_BLOCK_READ_EX) ( + IN EFI_BLOCK_IO2_PROTOCOL *This, + IN UINT32 MediaId, + IN EFI_LBA LBA, + IN OUT EFI_BLOCK_IO2_TOKEN *Token, + IN UINTN BufferSize, + OUT VOID *Buffer + ); + +/** + Write BufferSize bytes from Lba into Buffer. + + 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. + + @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, out] Token A pointer to the token associated with the transaction. + @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 write request was queued if Event is not NULL. + The data was written correctly to the device if + the Event is NULL. + @retval EFI_WRITE_PROTECTED The device can not be written to. + @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_DEVICE_ERROR The device reported an error while performing the write. + @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. + @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack + of resources. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_BLOCK_WRITE_EX) ( + IN EFI_BLOCK_IO2_PROTOCOL *This, + IN UINT32 MediaId, + IN EFI_LBA LBA, + IN OUT EFI_BLOCK_IO2_TOKEN *Token, + IN UINTN BufferSize, + IN VOID *Buffer + ); + +/** + Flush the Block Device. + + 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. + + @param[in] This Indicates a pointer to the calling context. + @param[in,out] Token A pointer to the token associated with the transaction + + @retval 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. + @retval EFI_DEVICE_ERROR The device reported an error while writting back + the data. + @retval EFI_WRITE_PROTECTED The device cannot be written to. + @retval EFI_NO_MEDIA There is no media in the device. + @retval EFI_MEDIA_CHANGED The MediaId is not for the current media. + @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack + of resources. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_BLOCK_FLUSH_EX) ( + IN EFI_BLOCK_IO2_PROTOCOL *This, + IN OUT EFI_BLOCK_IO2_TOKEN *Token + ); + +/// +/// The Block I/O2 protocol defines an extension to the Block I/O protocol which +/// enables the ability to read and write data at a block level in a non-blocking +// manner. +/// +struct _EFI_BLOCK_IO2_PROTOCOL { + /// + /// A pointer to the EFI_BLOCK_IO_MEDIA data for this device. + /// Type EFI_BLOCK_IO_MEDIA is defined in BlockIo.h. + /// + EFI_BLOCK_IO_MEDIA *Media; + + EFI_BLOCK_RESET_EX Reset; + EFI_BLOCK_READ_EX ReadBlocksEx; + EFI_BLOCK_WRITE_EX WriteBlocksEx; + EFI_BLOCK_FLUSH_EX FlushBlocksEx; +}; + +extern EFI_GUID gEfiBlockIo2ProtocolGuid; + +#endif +