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

/** @file\r
  Block IO protocol as defined in the UEFI 2.0 specification.\r
\r
  The Block IO protocol is used to abstract block devices like hard drives,\r
  DVD-ROMs and floppy drives.\r
\r
  Copyright (c) 2006, Intel Corporation                                                         \r
  All rights reserved. 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_IO_H__\r
#define __BLOCK_IO_H__\r
\r
#define EFI_BLOCK_IO_PROTOCOL_GUID \\r
  { \\r
    0x964e5b21, 0x6459, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \\r
  }\r
\r
typedef struct _EFI_BLOCK_IO_PROTOCOL  EFI_BLOCK_IO_PROTOCOL;\r
\r
//\r
// Protocol GUID name defined in EFI1.1.\r
// \r
#define BLOCK_IO_PROTOCOL       EFI_BLOCK_IO_PROTOCOL_GUID\r
\r
//\r
// Protocol defined in EFI1.1.\r
// \r
typedef EFI_BLOCK_IO_PROTOCOL   EFI_BLOCK_IO;\r
\r
/**\r
  Reset the Block Device.\r
\r
  @param  This                 Protocol instance pointer.\r
  @param  ExtendedVerification Driver may perform diagnostics on 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) (\r
  IN EFI_BLOCK_IO_PROTOCOL          *This,\r
  IN BOOLEAN                        ExtendedVerification\r
  )\r
;\r
\r
/**\r
  Read BufferSize bytes from Lba into Buffer.\r
\r
  @param  This       Protocol instance pointer.\r
  @param  MediaId    Id of the media, changes every time the media is replaced.\r
  @param  Lba        The starting Logical Block Address to read from\r
  @param  BufferSize Size of Buffer, must be a multiple of device block size.\r
  @param  Buffer     Buffer containing read data\r
\r
  @retval EFI_SUCCESS           The data was read correctly from the device.\r
  @retval EFI_DEVICE_ERROR      The device reported an error while performing the read.\r
  @retval EFI_NO_MEDIA          There is no media in the device.\r
  @retval EFI_MEDIA_CHANGED     The MediaId does not matched the current device.\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 read request contains device addresses that are not\r
                                valid for the device.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_BLOCK_READ) (\r
  IN EFI_BLOCK_IO_PROTOCOL          *This,\r
  IN UINT32                         MediaId,\r
  IN EFI_LBA                        Lba,\r
  IN UINTN                          BufferSize,\r
  OUT VOID                          *Buffer\r
  )\r
;\r
\r
/**\r
  Write BufferSize bytes from Lba into Buffer.\r
\r
  @param  This       Protocol instance pointer.\r
  @param  MediaId    Id of the media, changes every time the media is replaced.\r
  @param  Lba        The starting Logical Block Address to read from\r
  @param  BufferSize Size of Buffer, must be a multiple of device block size.\r
  @param  Buffer     Buffer containing read data\r
\r
  @retval EFI_SUCCESS           The data was written correctly to the device.\r
  @retval EFI_WRITE_PROTECTED   The device can not be written to.\r
  @retval EFI_DEVICE_ERROR      The device reported an error while performing the write.\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_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 a LBA that is not\r
                                valid for the device.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_BLOCK_WRITE) (\r
  IN EFI_BLOCK_IO_PROTOCOL          *This,\r
  IN UINT32                         MediaId,\r
  IN EFI_LBA                        Lba,\r
  IN UINTN                          BufferSize,\r
  IN VOID                           *Buffer\r
  )\r
;\r
\r
/**\r
  Flush the Block Device.\r
\r
  @param  This              Protocol instance pointer.\r
\r
  @retval EFI_SUCCESS       All outstanding data was written to the device\r
  @retval EFI_DEVICE_ERROR  The device reported an error while writting back the data\r
  @retval EFI_NO_MEDIA      There is no media in the device.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_BLOCK_FLUSH) (\r
  IN EFI_BLOCK_IO_PROTOCOL  *This\r
  )\r
;\r
\r
/**\r
  Block IO read only mode data and updated only via members of BlockIO\r
\r
**/\r
typedef struct {\r
  UINT32  MediaId;    ///< The curent media Id. If the media changes, this value is changed.\r
  BOOLEAN RemovableMedia;  ///< TRUE if the media is removable; otherwise, FALSE.\r
  BOOLEAN MediaPresent;    /**< TRUE if there is a media currently present in the device;\r
             othersise, FALSE. THis field shows the media present status\r
             as of the most recent ReadBlocks() or WriteBlocks() call.\r
        **/\r
  BOOLEAN LogicalPartition;  /**< TRUE if LBA 0 is the first block of a partition; otherwise\r
             FALSE. For media with only one partition this would be TRUE.\r
        **/\r
  BOOLEAN ReadOnly;    /**< TRUE if the media is marked read-only otherwise, FALSE.\r
             This field shows the read-only status as of the most recent WriteBlocks () call.\r
        **/\r
  BOOLEAN WriteCaching;    ///< TRUE if the WriteBlock () function caches write data.\r
\r
  UINT32  BlockSize;    /**< The intrinsic block size of the device. If the media changes, then\r
             this field is updated.\r
        **/\r
  UINT32  IoAlign;    ///< Supplies the alignment requirement for any buffer to read or write block(s).\r
\r
  EFI_LBA LastBlock;    /**< The last logical block address on the device.\r
             If the media changes, then this field is updated.\r
        **/\r
} EFI_BLOCK_IO_MEDIA;\r
\r
#define EFI_BLOCK_IO_PROTOCOL_REVISION  0x00010000\r
//\r
// Revision defined in EFI1.1.\r
// \r
#define EFI_BLOCK_IO_INTERFACE_REVISION   EFI_BLOCK_IO_PROTOCOL_REVISION\r
\r
struct _EFI_BLOCK_IO_PROTOCOL {\r
  UINT64              Revision;\r
\r
  EFI_BLOCK_IO_MEDIA  *Media;\r
\r
  EFI_BLOCK_RESET     Reset;\r
  EFI_BLOCK_READ      ReadBlocks;\r
  EFI_BLOCK_WRITE     WriteBlocks;\r
  EFI_BLOCK_FLUSH     FlushBlocks;\r
\r
};\r
\r
extern EFI_GUID gEfiBlockIoProtocolGuid;\r
\r
#endif\r
Commit	Line	Data
d1f95000	1	/** @file\r
8a7d75b0	2	Block IO protocol as defined in the UEFI 2.0 specification.\r
d1f95000	3	\r
	4	The Block IO protocol is used to abstract block devices like hard drives,\r
	5	DVD-ROMs and floppy drives.\r
	6	\r
	7	Copyright (c) 2006, Intel Corporation \r
	8	All rights reserved. This program and the accompanying materials \r
	9	are licensed and made available under the terms and conditions of the BSD License \r
	10	which accompanies this distribution. The full text of the license may be found at \r
	11	http://opensource.org/licenses/bsd-license.php \r
	12	\r
	13	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	14	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
	15	\r
d1f95000	16	**/\r
	17	\r
	18	#ifndef __BLOCK_IO_H__\r
	19	#define __BLOCK_IO_H__\r
	20	\r
	21	#define EFI_BLOCK_IO_PROTOCOL_GUID \\r
	22	{ \\r
	23	0x964e5b21, 0x6459, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \\r
	24	}\r
	25	\r
a6508c05	26	typedef struct _EFI_BLOCK_IO_PROTOCOL EFI_BLOCK_IO_PROTOCOL;\r
a6508c05	27	\r
d1f95000	28	//\r
a6508c05	29	// Protocol GUID name defined in EFI1.1.\r
	30	// \r
	31	#define BLOCK_IO_PROTOCOL EFI_BLOCK_IO_PROTOCOL_GUID\r
	32	\r
d1f95000	33	//\r
a6508c05	34	// Protocol defined in EFI1.1.\r
	35	// \r
	36	typedef EFI_BLOCK_IO_PROTOCOL EFI_BLOCK_IO;\r
d1f95000	37	\r
	38	/**\r
	39	Reset the Block Device.\r
	40	\r
	41	@param This Protocol instance pointer.\r
	42	@param ExtendedVerification Driver may perform diagnostics on reset.\r
	43	\r
	44	@retval EFI_SUCCESS The device was reset.\r
	45	@retval EFI_DEVICE_ERROR The device is not functioning properly and could\r
	46	not be reset.\r
	47	\r
	48	**/\r
	49	typedef\r
	50	EFI_STATUS\r
	51	(EFIAPI *EFI_BLOCK_RESET) (\r
	52	IN EFI_BLOCK_IO_PROTOCOL *This,\r
	53	IN BOOLEAN ExtendedVerification\r
	54	)\r
	55	;\r
	56	\r
	57	/**\r
	58	Read BufferSize bytes from Lba into Buffer.\r
	59	\r
	60	@param This Protocol instance pointer.\r
	61	@param MediaId Id of the media, changes every time the media is replaced.\r
	62	@param Lba The starting Logical Block Address to read from\r
	63	@param BufferSize Size of Buffer, must be a multiple of device block size.\r
	64	@param Buffer Buffer containing read data\r
	65	\r
	66	@retval EFI_SUCCESS The data was read correctly from the device.\r
	67	@retval EFI_DEVICE_ERROR The device reported an error while performing the read.\r
	68	@retval EFI_NO_MEDIA There is no media in the device.\r
	69	@retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.\r
	70	@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r
	71	@retval EFI_INVALID_PARAMETER The read request contains device addresses that are not\r
	72	valid for the device.\r
	73	\r
	74	**/\r
	75	typedef\r
	76	EFI_STATUS\r
	77	(EFIAPI *EFI_BLOCK_READ) (\r
	78	IN EFI_BLOCK_IO_PROTOCOL *This,\r
	79	IN UINT32 MediaId,\r
	80	IN EFI_LBA Lba,\r
	81	IN UINTN BufferSize,\r
	82	OUT VOID *Buffer\r
	83	)\r
	84	;\r
	85	\r
	86	/**\r
	87	Write BufferSize bytes from Lba into Buffer.\r
	88	\r
	89	@param This Protocol instance pointer.\r
	90	@param MediaId Id of the media, changes every time the media is replaced.\r
	91	@param Lba The starting Logical Block Address to read from\r
	92	@param BufferSize Size of Buffer, must be a multiple of device block size.\r
	93	@param Buffer Buffer containing read data\r
	94	\r
	95	@retval EFI_SUCCESS The data was written correctly to the device.\r
	96	@retval EFI_WRITE_PROTECTED The device can not be written to.\r
	97	@retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r
	98	@retval EFI_NO_MEDIA There is no media in the device.\r
	99	@retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r
	100	@retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r
101	@retval EFI_INVALID_PARAMETER The write request contains a LBA that is not\r
102	valid for the device.\r
103	\r
104	**/\r
105	typedef\r
106	EFI_STATUS\r
107	(EFIAPI *EFI_BLOCK_WRITE) (\r
108	IN EFI_BLOCK_IO_PROTOCOL *This,\r
109	IN UINT32 MediaId,\r
110	IN EFI_LBA Lba,\r
111	IN UINTN BufferSize,\r
112	IN VOID *Buffer\r
113	)\r
114	;\r
115	\r
116	/**\r
117	Flush the Block Device.\r
118	\r
119	@param This Protocol instance pointer.\r
120	\r
121	@retval EFI_SUCCESS All outstanding data was written to the device\r
122	@retval EFI_DEVICE_ERROR The device reported an error while writting back the data\r
123	@retval EFI_NO_MEDIA There is no media in the device.\r
124	\r
125	**/\r
126	typedef\r
127	EFI_STATUS\r
128	(EFIAPI *EFI_BLOCK_FLUSH) (\r
129	IN EFI_BLOCK_IO_PROTOCOL *This\r
130	)\r
131	;\r
132	\r
133	/**\r
134	Block IO read only mode data and updated only via members of BlockIO\r
135	\r
136	**/\r
137	typedef struct {\r
138	UINT32 MediaId; ///< The curent media Id. If the media changes, this value is changed.\r
139	BOOLEAN RemovableMedia; ///< TRUE if the media is removable; otherwise, FALSE.\r
140	BOOLEAN MediaPresent; /**< TRUE if there is a media currently present in the device;\r
141	othersise, FALSE. THis field shows the media present status\r
142	as of the most recent ReadBlocks() or WriteBlocks() call.\r
143	**/\r
144	BOOLEAN LogicalPartition; /**< TRUE if LBA 0 is the first block of a partition; otherwise\r
145	FALSE. For media with only one partition this would be TRUE.\r
146	**/\r
147	BOOLEAN ReadOnly; /**< TRUE if the media is marked read-only otherwise, FALSE.\r
148	This field shows the read-only status as of the most recent WriteBlocks () call.\r
149	**/\r
150	BOOLEAN WriteCaching; ///< TRUE if the WriteBlock () function caches write data.\r
151	\r
152	UINT32 BlockSize; /**< The intrinsic block size of the device. If the media changes, then\r
153	this field is updated.\r
154	**/\r
155	UINT32 IoAlign; ///< Supplies the alignment requirement for any buffer to read or write block(s).\r
156	\r
157	EFI_LBA LastBlock; /**< The last logical block address on the device.\r
158	If the media changes, then this field is updated.\r
159	**/\r
160	} EFI_BLOCK_IO_MEDIA;\r
161	\r
162	#define EFI_BLOCK_IO_PROTOCOL_REVISION 0x00010000\r
a6508c05	163	//\r
	164	// Revision defined in EFI1.1.\r
	165	// \r
	166	#define EFI_BLOCK_IO_INTERFACE_REVISION EFI_BLOCK_IO_PROTOCOL_REVISION\r
d1f95000	167	\r
	168	struct _EFI_BLOCK_IO_PROTOCOL {\r
	169	UINT64 Revision;\r
	170	\r
	171	EFI_BLOCK_IO_MEDIA *Media;\r
	172	\r
	173	EFI_BLOCK_RESET Reset;\r
	174	EFI_BLOCK_READ ReadBlocks;\r
	175	EFI_BLOCK_WRITE WriteBlocks;\r
	176	EFI_BLOCK_FLUSH FlushBlocks;\r
	177	\r
	178	};\r
	179	\r
	180	extern EFI_GUID gEfiBlockIoProtocolGuid;\r
	181	\r
	182	#endif\r