[mirror_edk2.git] / MdePkg / Include / Protocol / BlockIo2.h

/** @file\r
  Block IO2 protocol as defined in the UEFI 2.3.1 specification.\r
\r
  The Block IO2 protocol defines an extension to the Block IO protocol which\r
  enables the ability to read and write data at a block level in a non-blocking\r
  manner.\r
\r
  Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials                          \r
  are licensed and made available under the terms and conditions of the BSD License         \r
  which accompanies this distribution.  The full text of the license may be found at        \r
  http://opensource.org/licenses/bsd-license.php                                            \r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
\r
**/\r
\r
#ifndef __BLOCK_IO2_H__\r
#define __BLOCK_IO2_H__\r
\r
#include <Protocol/BlockIo.h>\r
\r
#define EFI_BLOCK_IO2_PROTOCOL_GUID \\r
  { \\r
    0xa77b2472, 0xe282, 0x4e9f, {0xa2, 0x45, 0xc2, 0xc0, 0xe2, 0x7b, 0xbc, 0xc1} \\r
  }\r
\r
typedef struct _EFI_BLOCK_IO2_PROTOCOL  EFI_BLOCK_IO2_PROTOCOL;\r
\r
/**\r
  The struct of Block IO2 Token.\r
**/\r
typedef struct {\r
\r
  ///\r
  /// If Event is NULL, then blocking I/O is performed.If Event is not NULL and\r
  /// non-blocking I/O is supported, then non-blocking I/O is performed, and\r
  /// Event will be signaled when the read request is completed.\r
  ///\r
  EFI_EVENT               Event;\r
\r
  ///\r
  /// Defines whether or not the signaled event encountered an error.\r
  ///\r
  EFI_STATUS              TransactionStatus;\r
} EFI_BLOCK_IO2_TOKEN;\r
\r
\r
/**\r
  Reset the block device hardware.\r
\r
  @param[in]  This                 Indicates a pointer to the calling context.\r
  @param[in]  ExtendedVerification Indicates that the driver may perform a more\r
                                   exhausive verification operation of the device\r
                                   during reset.\r
\r
  @retval EFI_SUCCESS          The device was reset.\r
  @retval EFI_DEVICE_ERROR     The device is not functioning properly and could\r
                               not be reset.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_BLOCK_RESET_EX) (\r
  IN EFI_BLOCK_IO2_PROTOCOL  *This,\r
  IN BOOLEAN                 ExtendedVerification\r
  );\r
\r
/**\r
  Read BufferSize bytes from Lba into Buffer.\r
  \r
  This function reads the requested number of blocks from the device. All the\r
  blocks are read, or an error is returned.\r
  If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and\r
  non-blocking I/O is being used, the Event associated with this request will\r
  not be signaled.\r
\r
  @param[in]       This       Indicates a pointer to the calling context.\r
  @param[in]       MediaId    Id of the media, changes every time the media is \r
                              replaced.\r
  @param[in]       Lba        The starting Logical Block Address to read from.\r
  @param[in, out]  Token	    A pointer to the token associated with the transaction.\r
  @param[in]       BufferSize Size of Buffer, must be a multiple of device block size.  \r
  @param[out]      Buffer     A pointer to the destination buffer for the data. The \r
                              caller is responsible for either having implicit or \r
                              explicit ownership of the buffer.\r
\r
  @retval EFI_SUCCESS           The read request was queued if Token->Event is\r
                                not NULL.The data was read correctly from the\r
                                device if the Token->Event is NULL.\r
  @retval EFI_DEVICE_ERROR      The device reported an error while performing\r
                                the read.\r
  @retval EFI_NO_MEDIA          There is no media in the device.\r
  @retval EFI_MEDIA_CHANGED     The MediaId is not for the current media.\r
  @retval EFI_BAD_BUFFER_SIZE   The BufferSize parameter is not a multiple of the\r
                                intrinsic block size of the device.\r
  @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid, \r
                                or the buffer is not on proper alignment.\r
  @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack\r
                                of resources.\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_BLOCK_READ_EX) (\r
  IN     EFI_BLOCK_IO2_PROTOCOL *This,\r
  IN     UINT32                 MediaId,\r
  IN     EFI_LBA                LBA,\r
  IN OUT EFI_BLOCK_IO2_TOKEN    *Token,\r
  IN     UINTN                  BufferSize,\r
     OUT VOID                  *Buffer\r
  );\r
\r
/**\r
  Write BufferSize bytes from Lba into Buffer.\r
\r
  This function writes the requested number of blocks to the device. All blocks\r
  are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,\r
  EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is\r
  being used, the Event associated with this request will not be signaled.\r
\r
  @param[in]       This       Indicates a pointer to the calling context.\r
  @param[in]       MediaId    The media ID that the write request is for.\r
  @param[in]       Lba        The starting logical block address to be written. The\r
                              caller is responsible for writing to only legitimate\r
                              locations.\r
  @param[in, out]  Token      A pointer to the token associated with the transaction.\r
  @param[in]       BufferSize Size of Buffer, must be a multiple of device block size.\r
  @param[in]       Buffer     A pointer to the source buffer for the data.\r
\r
  @retval EFI_SUCCESS           The write request was queued if Event is not NULL.\r
                                The data was written correctly to the device if\r
                                the Event is NULL.\r
  @retval EFI_WRITE_PROTECTED   The device can not be written to.\r
  @retval EFI_NO_MEDIA          There is no media in the device.\r
  @retval EFI_MEDIA_CHNAGED     The MediaId does not matched the current device.\r
  @retval EFI_DEVICE_ERROR      The device reported an error while performing the write.\r
  @retval EFI_BAD_BUFFER_SIZE   The Buffer was not a multiple of the block size of the device.\r
  @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid, \r
                                or the buffer is not on proper alignment.\r
  @retval EFI_OUT_OF_RESOURCES  The request could not be completed due to a lack\r
                                of resources.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_BLOCK_WRITE_EX) (\r
  IN     EFI_BLOCK_IO2_PROTOCOL  *This,\r
  IN     UINT32                 MediaId,\r
  IN     EFI_LBA                LBA,\r
  IN OUT EFI_BLOCK_IO2_TOKEN    *Token,\r
  IN     UINTN                  BufferSize,\r
  IN     VOID                   *Buffer\r
  );\r
\r
/**\r
  Flush the Block Device.\r
 \r
  If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED\r
  is returned and non-blocking I/O is being used, the Event associated with\r
  this request will not be signaled.  \r
\r
  @param[in]      This     Indicates a pointer to the calling context.\r
  @param[in,out]  Token    A pointer to the token associated with the transaction\r
\r
  @retval EFI_SUCCESS          The flush request was queued if Event is not NULL.\r
                               All outstanding data was written correctly to the\r
                               device if the Event is NULL.\r
  @retval EFI_DEVICE_ERROR     The device reported an error while writting back\r
                               the data.\r
  @retval EFI_WRITE_PROTECTED  The device cannot be written to.\r
  @retval EFI_NO_MEDIA         There is no media in the device.\r
  @retval EFI_MEDIA_CHANGED    The MediaId is not for the current media.\r
  @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r
                               of resources.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_BLOCK_FLUSH_EX) (\r
  IN     EFI_BLOCK_IO2_PROTOCOL   *This,\r
  IN OUT EFI_BLOCK_IO2_TOKEN      *Token\r
  );\r
\r
///\r
///  The Block I/O2 protocol defines an extension to the Block I/O protocol which\r
///  enables the ability to read and write data at a block level in a non-blocking\r
//   manner.\r
///\r
struct _EFI_BLOCK_IO2_PROTOCOL {\r
  ///\r
  /// A pointer to the EFI_BLOCK_IO_MEDIA data for this device. \r
  /// Type EFI_BLOCK_IO_MEDIA is defined in BlockIo.h.\r
  ///  \r
  EFI_BLOCK_IO_MEDIA      *Media;\r
\r
  EFI_BLOCK_RESET_EX      Reset;\r
  EFI_BLOCK_READ_EX       ReadBlocksEx;\r
  EFI_BLOCK_WRITE_EX      WriteBlocksEx;\r
  EFI_BLOCK_FLUSH_EX      FlushBlocksEx;\r
};\r
\r
extern EFI_GUID gEfiBlockIo2ProtocolGuid;\r
\r
#endif\r
\r
Commit	Line	Data
b5867578	1	/** @file\r
	2	Block IO2 protocol as defined in the UEFI 2.3.1 specification.\r
	3	\r
	4	The Block IO2 protocol defines an extension to the Block IO protocol which\r
	5	enables the ability to read and write data at a block level in a non-blocking\r
	6	manner.\r
	7	\r
	8	Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>\r
	9	This program and the accompanying materials \r
	10	are licensed and made available under the terms and conditions of the BSD License \r
	11	which accompanies this distribution. The full text of the license may be found at \r
	12	http://opensource.org/licenses/bsd-license.php \r
	13	\r
	14	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	15	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
	16	\r
	17	**/\r
	18	\r
	19	#ifndef __BLOCK_IO2_H__\r
	20	#define __BLOCK_IO2_H__\r
	21	\r
	22	#include <Protocol/BlockIo.h>\r
	23	\r
	24	#define EFI_BLOCK_IO2_PROTOCOL_GUID \\r
	25	{ \\r
	26	0xa77b2472, 0xe282, 0x4e9f, {0xa2, 0x45, 0xc2, 0xc0, 0xe2, 0x7b, 0xbc, 0xc1} \\r
	27	}\r
	28	\r
	29	typedef struct _EFI_BLOCK_IO2_PROTOCOL EFI_BLOCK_IO2_PROTOCOL;\r
	30	\r
	31	/**\r
	32	The struct of Block IO2 Token.\r
	33	**/\r
	34	typedef struct {\r
	35	\r
	36	///\r
	37	/// If Event is NULL, then blocking I/O is performed.If Event is not NULL and\r
	38	/// non-blocking I/O is supported, then non-blocking I/O is performed, and\r
	39	/// Event will be signaled when the read request is completed.\r
	40	///\r
	41	EFI_EVENT Event;\r
	42	\r
	43	///\r
	44	/// Defines whether or not the signaled event encountered an error.\r
	45	///\r
	46	EFI_STATUS TransactionStatus;\r
	47	} EFI_BLOCK_IO2_TOKEN;\r
	48	\r
	49	\r
	50	/**\r
	51	Reset the block device hardware.\r
	52	\r
	53	@param[in] This Indicates a pointer to the calling context.\r
	54	@param[in] ExtendedVerification Indicates that the driver may perform a more\r
00b7cc0f	55	exhausive verification operation of the device\r
b5867578	56	during reset.\r
	57	\r
	58	@retval EFI_SUCCESS The device was reset.\r
	59	@retval EFI_DEVICE_ERROR The device is not functioning properly and could\r
	60	not be reset.\r
	61	\r
	62	**/\r
	63	typedef\r
	64	EFI_STATUS\r
	65	(EFIAPI *EFI_BLOCK_RESET_EX) (\r
	66	IN EFI_BLOCK_IO2_PROTOCOL *This,\r
	67	IN BOOLEAN ExtendedVerification\r
	68	);\r
	69	\r
	70	/**\r
	71	Read BufferSize bytes from Lba into Buffer.\r
	72	\r
	73	This function reads the requested number of blocks from the device. All the\r
	74	blocks are read, or an error is returned.\r
	75	If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_or EFI_MEDIA_CHANGED is returned and\r
	76	non-blocking I/O is being used, the Event associated with this request will\r
	77	not be signaled.\r
	78	\r
	79	@param[in] This Indicates a pointer to the calling context.\r
	80	@param[in] MediaId Id of the media, changes every time the media is \r
	81	replaced.\r
	82	@param[in] Lba The starting Logical Block Address to read from.\r
	83	@param[in, out] Token A pointer to the token associated with the transaction.\r
	84	@param[in] BufferSize Size of Buffer, must be a multiple of device block size. \r
	85	@param[out] Buffer A pointer to the destination buffer for the data. The \r
	86	caller is responsible for either having implicit or \r
	87	explicit ownership of the buffer.\r
	88	\r
	89	@retval EFI_SUCCESS The read request was queued if Token->Event is\r
	90	not NULL.The data was read correctly from the\r
	91	device if the Token->Event is NULL.\r
	92	@retval EFI_DEVICE_ERROR The device reported an error while performing\r
	93	the read.\r
	94	@retval EFI_NO_MEDIA There is no media in the device.\r
	95	@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r
	96	@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of the\r
	97	intrinsic block size of the device.\r
	98	@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid, \r
	99	or the buffer is not on proper alignment.\r
	100	@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r
	101	of resources.\r
	102	**/\r
	103	typedef\r
	104	EFI_STATUS\r
	105	(EFIAPI *EFI_BLOCK_READ_EX) (\r
	106	IN EFI_BLOCK_IO2_PROTOCOL *This,\r
	107	IN UINT32 MediaId,\r
	108	IN EFI_LBA LBA,\r
	109	IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r
	110	IN UINTN BufferSize,\r
	111	OUT VOID *Buffer\r
	112	);\r
	113	\r
	114	/**\r
	115	Write BufferSize bytes from Lba into Buffer.\r
	116	\r
	117	This function writes the requested number of blocks to the device. All blocks\r
	118	are written, or an error is returned.If EFI_DEVICE_ERROR, EFI_NO_MEDIA,\r
	119	EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED is returned and non-blocking I/O is\r
120	being used, the Event associated with this request will not be signaled.\r
121	\r
122	@param[in] This Indicates a pointer to the calling context.\r
123	@param[in] MediaId The media ID that the write request is for.\r
124	@param[in] Lba The starting logical block address to be written. The\r
125	caller is responsible for writing to only legitimate\r
126	locations.\r
127	@param[in, out] Token A pointer to the token associated with the transaction.\r
128	@param[in] BufferSize Size of Buffer, must be a multiple of device block size.\r
129	@param[in] Buffer A pointer to the source buffer for the data.\r
130	\r
131	@retval EFI_SUCCESS The write request was queued if Event is not NULL.\r
132	The data was written correctly to the device if\r
133	the Event is NULL.\r
134	@retval EFI_WRITE_PROTECTED The device can not be written to.\r
135	@retval EFI_NO_MEDIA There is no media in the device.\r
136	@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r
137	@retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r
138	@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r
139	@retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid, \r
140	or the buffer is not on proper alignment.\r
141	@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r
142	of resources.\r
143	\r
144	**/\r
145	typedef\r
146	EFI_STATUS\r
147	(EFIAPI *EFI_BLOCK_WRITE_EX) (\r
148	IN EFI_BLOCK_IO2_PROTOCOL *This,\r
149	IN UINT32 MediaId,\r
150	IN EFI_LBA LBA,\r
151	IN OUT EFI_BLOCK_IO2_TOKEN *Token,\r
152	IN UINTN BufferSize,\r
153	IN VOID *Buffer\r
154	);\r
155	\r
156	/**\r
157	Flush the Block Device.\r
158	\r
159	If EFI_DEVICE_ERROR, EFI_NO_MEDIA,_EFI_WRITE_PROTECTED or EFI_MEDIA_CHANGED\r
160	is returned and non-blocking I/O is being used, the Event associated with\r
161	this request will not be signaled. \r
162	\r
163	@param[in] This Indicates a pointer to the calling context.\r
164	@param[in,out] Token A pointer to the token associated with the transaction\r
165	\r
166	@retval EFI_SUCCESS The flush request was queued if Event is not NULL.\r
167	All outstanding data was written correctly to the\r
168	device if the Event is NULL.\r
169	@retval EFI_DEVICE_ERROR The device reported an error while writting back\r
170	the data.\r
171	@retval EFI_WRITE_PROTECTED The device cannot be written to.\r
172	@retval EFI_NO_MEDIA There is no media in the device.\r
173	@retval EFI_MEDIA_CHANGED The MediaId is not for the current media.\r
174	@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack\r
175	of resources.\r
176	\r
177	**/\r
178	typedef\r
179	EFI_STATUS\r
180	(EFIAPI *EFI_BLOCK_FLUSH_EX) (\r
181	IN EFI_BLOCK_IO2_PROTOCOL *This,\r
182	IN OUT EFI_BLOCK_IO2_TOKEN *Token\r
183	);\r
184	\r
185	///\r
186	/// The Block I/O2 protocol defines an extension to the Block I/O protocol which\r
187	/// enables the ability to read and write data at a block level in a non-blocking\r
188	// manner.\r
189	///\r
190	struct _EFI_BLOCK_IO2_PROTOCOL {\r
191	///\r
192	/// A pointer to the EFI_BLOCK_IO_MEDIA data for this device. \r
193	/// Type EFI_BLOCK_IO_MEDIA is defined in BlockIo.h.\r
194	/// \r
195	EFI_BLOCK_IO_MEDIA *Media;\r
196	\r
197	EFI_BLOCK_RESET_EX Reset;\r
198	EFI_BLOCK_READ_EX ReadBlocksEx;\r
199	EFI_BLOCK_WRITE_EX WriteBlocksEx;\r
200	EFI_BLOCK_FLUSH_EX FlushBlocksEx;\r
201	};\r
202	\r
203	extern EFI_GUID gEfiBlockIo2ProtocolGuid;\r
204	\r
205	#endif\r
206	\r