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

/** @file\r
  Provides the services required to access a block I/O device during PEI recovery \r
  boot mode.\r
\r
  The Recovery Module PPI and the Device Recovery Module PPI are device neutral. \r
  This PPI is device specific and addresses the most common form of recovery \r
  media-block I/O devices such as legacy floppy, CD-ROM, or IDE devices.\r
\r
  The Recovery Block I/O PPI is used to access block devices. Because the Recovery \r
  Block I/O PPIs that are provided by the PEI ATAPI driver and PEI legacy floppy \r
  driver are the same, here we define a set of general PPIs for both drivers to use.\r
  \r
Copyright (c) 2007 - 2010, Intel Corporation.  All rights reserved<BR>\r
This program and the accompanying materials are licensed and made available under \r
the terms and conditions of the BSD License that accompanies this distribution.  \r
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
  @par Revision Reference:\r
  This PPI is defined in UEFI Platform Initialization Specification 1.2 Volume 1: \r
  Pre-EFI Initalization Core Interface.\r
\r
**/\r
\r
#ifndef _PEI_BLOCK_IO_H_\r
#define _PEI_BLOCK_IO_H_\r
\r
///\r
/// Global ID for EFI_PEI_RECOVERY_BLOCK_IO_PPI\r
///\r
#define EFI_PEI_RECOVERY_BLOCK_IO_PPI_GUID \\r
  { \\r
    0x695d8aa1, 0x42ee, 0x4c46, { 0x80, 0x5c, 0x6e, 0xa6, 0xbc, 0xe7, 0x99, 0xe3 } \\r
  }\r
\r
///\r
/// The forward declaration for EFI_PEI_RECOVERY_BLOCK_IO_PPI.\r
///\r
typedef struct _EFI_PEI_RECOVERY_BLOCK_IO_PPI  EFI_PEI_RECOVERY_BLOCK_IO_PPI;\r
\r
///\r
/// All blocks on the recovery device are addressed with a 64-bit Logical Block Address (LBA).\r
///\r
typedef UINT64  EFI_PEI_LBA;\r
\r
///\r
/// EFI_PEI_BLOCK_DEVICE_TYPE\r
///\r
typedef enum {\r
  LegacyFloppy  = 0,   ///< The recovery device is a floppy. \r
  IdeCDROM      = 1,   ///< The recovery device is an IDE CD-ROM\r
  IdeLS120      = 2,   ///< The recovery device is an IDE LS-120\r
  UsbMassStorage= 3,   ///< The recovery device is a USB Mass Storage device\r
  MaxDeviceType\r
} EFI_PEI_BLOCK_DEVICE_TYPE;\r
\r
///\r
/// Specification inconsistency here: \r
/// PEI_BLOCK_IO_MEDIA has been changed to EFI_PEI_BLOCK_IO_MEDIA.\r
/// Inconsistency exists in UEFI Platform Initialization Specification 1.2 \r
/// Volume 1: Pre-EFI Initalization Core Interface, where all referrences to \r
/// this structure name are with the "EFI_" prefix, except for the definition \r
/// which is without "EFI_".  So the name of PEI_BLOCK_IO_MEDIA is taken as the \r
/// exception, and EFI_PEI_BLOCK_IO_MEDIA is used to comply with most of \r
/// the specification.\r
///\r
typedef struct {\r
  ///\r
  /// The type of media device being referenced by DeviceIndex. \r
  ///\r
  EFI_PEI_BLOCK_DEVICE_TYPE  DeviceType;\r
  ///\r
  /// A flag that indicates if media is present. This flag is always set for \r
  /// nonremovable media devices.\r
  ///\r
  BOOLEAN                    MediaPresent;\r
  ///\r
  /// The last logical block that the device supports.\r
  ///\r
  UINTN                      LastBlock;\r
  ///\r
  /// The size of a logical block in bytes.\r
  ///\r
  UINTN                      BlockSize;\r
} EFI_PEI_BLOCK_IO_MEDIA;\r
\r
/**\r
  Gets the count of block I/O devices that one specific block driver detects.\r
\r
  This function is used for getting the count of block I/O devices that one \r
  specific block driver detects.  To the PEI ATAPI driver, it returns the number\r
  of all the detected ATAPI devices it detects during the enumeration process. \r
  To the PEI legacy floppy driver, it returns the number of all the legacy \r
  devices it finds during its enumeration process. If no device is detected, \r
  then the function will return zero.  \r
  \r
  @param[in]  PeiServices          General-purpose services that are available \r
                                   to every PEIM.\r
  @param[in]  This                 Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI \r
                                   instance.\r
  @param[out] NumberBlockDevices   The number of block I/O devices discovered.\r
\r
  @retval     EFI_SUCCESS          The operation performed successfully.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_PEI_GET_NUMBER_BLOCK_DEVICES)(\r
  IN  EFI_PEI_SERVICES               **PeiServices,\r
  IN  EFI_PEI_RECOVERY_BLOCK_IO_PPI  *This,\r
  OUT UINTN                          *NumberBlockDevices\r
  );\r
\r
/**\r
  Gets a block device's media information.\r
\r
  This function will provide the caller with the specified block device's media \r
  information. If the media changes, calling this function will update the media \r
  information accordingly.\r
\r
  @param[in]  PeiServices   General-purpose services that are available to every\r
                            PEIM\r
  @param[in]  This          Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI instance.\r
  @param[in]  DeviceIndex   Specifies the block device to which the function wants \r
                            to talk. Because the driver that implements Block I/O \r
                            PPIs will manage multiple block devices, the PPIs that \r
                            want to talk to a single device must specify the \r
                            device index that was assigned during the enumeration\r
                            process. This index is a number from one to \r
                            NumberBlockDevices.\r
  @param[out] MediaInfo     The media information of the specified block media.  \r
                            The caller is responsible for the ownership of this \r
                            data structure.\r
\r
  @par Note: \r
      The MediaInfo structure describes an enumeration of possible block device \r
      types.  This enumeration exists because no device paths are actually passed \r
      across interfaces that describe the type or class of hardware that is publishing \r
      the block I/O interface. This enumeration will allow for policy decisions\r
      in the Recovery PEIM, such as "Try to recover from legacy floppy first, \r
      LS-120 second, CD-ROM third." If there are multiple partitions abstracted \r
      by a given device type, they should be reported in ascending order; this \r
      order also applies to nested partitions, such as legacy MBR, where the \r
      outermost partitions would have precedence in the reporting order. The \r
      same logic applies to systems such as IDE that have precedence relationships \r
      like "Master/Slave" or "Primary/Secondary". The master device should be \r
      reported first, the slave second.\r
  \r
  @retval EFI_SUCCESS        Media information about the specified block device \r
                             was obtained successfully.\r
  @retval EFI_DEVICE_ERROR   Cannot get the media information due to a hardware \r
                             error.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_PEI_GET_DEVICE_MEDIA_INFORMATION)(\r
  IN  EFI_PEI_SERVICES               **PeiServices,\r
  IN  EFI_PEI_RECOVERY_BLOCK_IO_PPI  *This,\r
  IN  UINTN                          DeviceIndex,\r
  OUT EFI_PEI_BLOCK_IO_MEDIA         *MediaInfo\r
  );\r
\r
/**\r
  Reads the requested number of blocks from the specified block device.\r
\r
  The function reads the requested number of blocks from the device. All the \r
  blocks are read, or an error is returned. If there is no media in the device,\r
  the function returns EFI_NO_MEDIA.\r
\r
  @param[in]  PeiServices   General-purpose services that are available to \r
                            every PEIM.\r
  @param[in]  This          Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI instance.\r
  @param[in]  DeviceIndex   Specifies the block device to which the function wants \r
                            to talk. Because the driver that implements Block I/O \r
                            PPIs will manage multiple block devices, PPIs that \r
                            want to talk to a single device must specify the device \r
                            index that was assigned during the enumeration process. \r
                            This index is a number from one to NumberBlockDevices.\r
  @param[in]  StartLBA      The starting logical block address (LBA) to read from\r
                            on the device\r
  @param[in]  BufferSize    The size of the Buffer in bytes. This number must be\r
                            a multiple of the intrinsic block size of the device.\r
  @param[out] Buffer        A pointer to the destination buffer for the data.\r
                            The caller is responsible for the ownership of the \r
                            buffer.\r
                         \r
  @retval EFI_SUCCESS             The data was read correctly from the device.\r
  @retval EFI_DEVICE_ERROR        The device reported an error while attempting \r
                                  to perform the read operation.\r
  @retval EFI_INVALID_PARAMETER   The read request contains LBAs that are not \r
                                  valid, or the buffer is not properly aligned.\r
  @retval EFI_NO_MEDIA            There is no media in the device.\r
  @retval EFI_BAD_BUFFER_SIZE     The BufferSize parameter is not a multiple of\r
                                  the intrinsic block size of the device.\r
\r
**/\r
typedef\r
EFI_STATUS\r
(EFIAPI *EFI_PEI_READ_BLOCKS)(\r
  IN  EFI_PEI_SERVICES               **PeiServices,\r
  IN  EFI_PEI_RECOVERY_BLOCK_IO_PPI  *This,\r
  IN  UINTN                          DeviceIndex,\r
  IN  EFI_PEI_LBA                    StartLBA,\r
  IN  UINTN                          BufferSize,\r
  OUT VOID                           *Buffer\r
  );\r
\r
///\r
///  EFI_PEI_RECOVERY_BLOCK_IO_PPI provides the services that are required\r
///  to access a block I/O device during PEI recovery boot mode.\r
///\r
struct _EFI_PEI_RECOVERY_BLOCK_IO_PPI {\r
  ///\r
  /// Gets the number of block I/O devices that the specific block driver manages.\r
  ///\r
  EFI_PEI_GET_NUMBER_BLOCK_DEVICES      GetNumberOfBlockDevices;\r
  \r
  ///\r
  /// Gets the specified media information.\r
  ///\r
  EFI_PEI_GET_DEVICE_MEDIA_INFORMATION  GetBlockDeviceMediaInfo;\r
  \r
  ///\r
  /// Reads the requested number of blocks from the specified block device.\r
  ///\r
  EFI_PEI_READ_BLOCKS                   ReadBlocks;\r
};\r
\r
extern EFI_GUID gEfiPeiVirtualBlockIoPpiGuid;\r
\r
#endif\r
Commit	Line	Data
1cddf2ef	1	/** @file\r
	2	Provides the services required to access a block I/O device during PEI recovery \r
	3	boot mode.\r
	4	\r
	5	The Recovery Module PPI and the Device Recovery Module PPI are device neutral. \r
	6	This PPI is device specific and addresses the most common form of recovery \r
	7	media-block I/O devices such as legacy floppy, CD-ROM, or IDE devices.\r
	8	\r
	9	The Recovery Block I/O PPI is used to access block devices. Because the Recovery \r
	10	Block I/O PPIs that are provided by the PEI ATAPI driver and PEI legacy floppy \r
	11	driver are the same, here we define a set of general PPIs for both drivers to use.\r
	12	\r
af2dc6a7	13	Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved<BR>\r
	14	This program and the accompanying materials are licensed and made available under \r
	15	the terms and conditions of the BSD License that accompanies this distribution. \r
	16	The full text of the license may be found at\r
	17	http://opensource.org/licenses/bsd-license.php. \r
1cddf2ef	18	\r
af2dc6a7	19	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
af2dc6a7	20	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
1cddf2ef	21	\r
	22	@par Revision Reference:\r
	23	This PPI is defined in UEFI Platform Initialization Specification 1.2 Volume 1: \r
af2dc6a7	24	Pre-EFI Initalization Core Interface.\r
1cddf2ef	25	\r
	26	**/\r
	27	\r
	28	#ifndef _PEI_BLOCK_IO_H_\r
	29	#define _PEI_BLOCK_IO_H_\r
	30	\r
	31	///\r
	32	/// Global ID for EFI_PEI_RECOVERY_BLOCK_IO_PPI\r
	33	///\r
	34	#define EFI_PEI_RECOVERY_BLOCK_IO_PPI_GUID \\r
	35	{ \\r
	36	0x695d8aa1, 0x42ee, 0x4c46, { 0x80, 0x5c, 0x6e, 0xa6, 0xbc, 0xe7, 0x99, 0xe3 } \\r
	37	}\r
	38	\r
	39	///\r
af2dc6a7	40	/// The forward declaration for EFI_PEI_RECOVERY_BLOCK_IO_PPI.\r
1cddf2ef	41	///\r
	42	typedef struct _EFI_PEI_RECOVERY_BLOCK_IO_PPI EFI_PEI_RECOVERY_BLOCK_IO_PPI;\r
	43	\r
	44	///\r
af2dc6a7	45	/// All blocks on the recovery device are addressed with a 64-bit Logical Block Address (LBA).\r
1cddf2ef	46	///\r
	47	typedef UINT64 EFI_PEI_LBA;\r
	48	\r
	49	///\r
	50	/// EFI_PEI_BLOCK_DEVICE_TYPE\r
	51	///\r
	52	typedef enum {\r
	53	LegacyFloppy = 0, ///< The recovery device is a floppy. \r
	54	IdeCDROM = 1, ///< The recovery device is an IDE CD-ROM\r
	55	IdeLS120 = 2, ///< The recovery device is an IDE LS-120\r
	56	UsbMassStorage= 3, ///< The recovery device is a USB Mass Storage device\r
	57	MaxDeviceType\r
	58	} EFI_PEI_BLOCK_DEVICE_TYPE;\r
	59	\r
	60	///\r
af2dc6a7	61	/// Specification inconsistency here: \r
1cddf2ef	62	/// PEI_BLOCK_IO_MEDIA has been changed to EFI_PEI_BLOCK_IO_MEDIA.\r
	63	/// Inconsistency exists in UEFI Platform Initialization Specification 1.2 \r
	64	/// Volume 1: Pre-EFI Initalization Core Interface, where all referrences to \r
	65	/// this structure name are with the "EFI_" prefix, except for the definition \r
	66	/// which is without "EFI_". So the name of PEI_BLOCK_IO_MEDIA is taken as the \r
af2dc6a7	67	/// exception, and EFI_PEI_BLOCK_IO_MEDIA is used to comply with most of \r
1cddf2ef	68	/// the specification.\r
	69	///\r
	70	typedef struct {\r
	71	///\r
	72	/// The type of media device being referenced by DeviceIndex. \r
	73	///\r
	74	EFI_PEI_BLOCK_DEVICE_TYPE DeviceType;\r
	75	///\r
	76	/// A flag that indicates if media is present. This flag is always set for \r
	77	/// nonremovable media devices.\r
	78	///\r
	79	BOOLEAN MediaPresent;\r
	80	///\r
	81	/// The last logical block that the device supports.\r
	82	///\r
	83	UINTN LastBlock;\r
	84	///\r
	85	/// The size of a logical block in bytes.\r
	86	///\r
	87	UINTN BlockSize;\r
	88	} EFI_PEI_BLOCK_IO_MEDIA;\r
	89	\r
	90	/**\r
	91	Gets the count of block I/O devices that one specific block driver detects.\r
	92	\r
	93	This function is used for getting the count of block I/O devices that one \r
	94	specific block driver detects. To the PEI ATAPI driver, it returns the number\r
	95	of all the detected ATAPI devices it detects during the enumeration process. \r
	96	To the PEI legacy floppy driver, it returns the number of all the legacy \r
	97	devices it finds during its enumeration process. If no device is detected, \r
	98	then the function will return zero. \r
	99	\r
	100	@param[in] PeiServices General-purpose services that are available \r
	101	to every PEIM.\r
	102	@param[in] This Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI \r
	103	instance.\r
	104	@param[out] NumberBlockDevices The number of block I/O devices discovered.\r
	105	\r
af2dc6a7	106	@retval EFI_SUCCESS The operation performed successfully.\r
d69f66d6	107	\r
1cddf2ef	108	**/\r
	109	typedef\r
	110	EFI_STATUS\r
	111	(EFIAPI *EFI_PEI_GET_NUMBER_BLOCK_DEVICES)(\r
	112	IN EFI_PEI_SERVICES **PeiServices,\r
	113	IN EFI_PEI_RECOVERY_BLOCK_IO_PPI *This,\r
	114	OUT UINTN *NumberBlockDevices\r
	115	);\r
	116	\r
	117	/**\r
	118	Gets a block device's media information.\r
	119	\r
	120	This function will provide the caller with the specified block device's media \r
	121	information. If the media changes, calling this function will update the media \r
	122	information accordingly.\r
	123	\r
	124	@param[in] PeiServices General-purpose services that are available to every\r
	125	PEIM\r
	126	@param[in] This Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI instance.\r
	127	@param[in] DeviceIndex Specifies the block device to which the function wants \r
	128	to talk. Because the driver that implements Block I/O \r
	129	PPIs will manage multiple block devices, the PPIs that \r
	130	want to talk to a single device must specify the \r
	131	device index that was assigned during the enumeration\r
	132	process. This index is a number from one to \r
	133	NumberBlockDevices.\r
	134	@param[out] MediaInfo The media information of the specified block media. \r
	135	The caller is responsible for the ownership of this \r
	136	data structure.\r
	137	\r
	138	@par Note: \r
	139	The MediaInfo structure describes an enumeration of possible block device \r
	140	types. This enumeration exists because no device paths are actually passed \r
	141	across interfaces that describe the type or class of hardware that is publishing \r
	142	the block I/O interface. This enumeration will allow for policy decisions\r
	143	in the Recovery PEIM, such as "Try to recover from legacy floppy first, \r
	144	LS-120 second, CD-ROM third." If there are multiple partitions abstracted \r
	145	by a given device type, they should be reported in ascending order; this \r
	146	order also applies to nested partitions, such as legacy MBR, where the \r
	147	outermost partitions would have precedence in the reporting order. The \r
	148	same logic applies to systems such as IDE that have precedence relationships \r
af2dc6a7	149	like "Master/Slave" or "Primary/Secondary". The master device should be \r
1cddf2ef	150	reported first, the slave second.\r
	151	\r
	152	@retval EFI_SUCCESS Media information about the specified block device \r
	153	was obtained successfully.\r
	154	@retval EFI_DEVICE_ERROR Cannot get the media information due to a hardware \r
	155	error.\r
	156	\r
	157	**/\r
	158	typedef\r
	159	EFI_STATUS\r
	160	(EFIAPI *EFI_PEI_GET_DEVICE_MEDIA_INFORMATION)(\r
	161	IN EFI_PEI_SERVICES **PeiServices,\r
	162	IN EFI_PEI_RECOVERY_BLOCK_IO_PPI *This,\r
	163	IN UINTN DeviceIndex,\r
	164	OUT EFI_PEI_BLOCK_IO_MEDIA *MediaInfo\r
	165	);\r
	166	\r
	167	/**\r
	168	Reads the requested number of blocks from the specified block device.\r
	169	\r
	170	The function reads the requested number of blocks from the device. All the \r
	171	blocks are read, or an error is returned. If there is no media in the device,\r
	172	the function returns EFI_NO_MEDIA.\r
	173	\r
	174	@param[in] PeiServices General-purpose services that are available to \r
	175	every PEIM.\r
	176	@param[in] This Indicates the EFI_PEI_RECOVERY_BLOCK_IO_PPI instance.\r
	177	@param[in] DeviceIndex Specifies the block device to which the function wants \r
	178	to talk. Because the driver that implements Block I/O \r
af2dc6a7	179	PPIs will manage multiple block devices, PPIs that \r
1cddf2ef	180	want to talk to a single device must specify the device \r
	181	index that was assigned during the enumeration process. \r
	182	This index is a number from one to NumberBlockDevices.\r
	183	@param[in] StartLBA The starting logical block address (LBA) to read from\r
	184	on the device\r
	185	@param[in] BufferSize The size of the Buffer in bytes. This number must be\r
	186	a multiple of the intrinsic block size of the device.\r
	187	@param[out] Buffer A pointer to the destination buffer for the data.\r
	188	The caller is responsible for the ownership of the \r
	189	buffer.\r
	190	\r
	191	@retval EFI_SUCCESS The data was read correctly from the device.\r
	192	@retval EFI_DEVICE_ERROR The device reported an error while attempting \r
	193	to perform the read operation.\r
	194	@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not \r
	195	valid, or the buffer is not properly aligned.\r
	196	@retval EFI_NO_MEDIA There is no media in the device.\r
	197	@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of\r
	198	the intrinsic block size of the device.\r
	199	\r
	200	**/\r
	201	typedef\r
	202	EFI_STATUS\r
	203	(EFIAPI *EFI_PEI_READ_BLOCKS)(\r
	204	IN EFI_PEI_SERVICES **PeiServices,\r
	205	IN EFI_PEI_RECOVERY_BLOCK_IO_PPI *This,\r
	206	IN UINTN DeviceIndex,\r
	207	IN EFI_PEI_LBA StartLBA,\r
	208	IN UINTN BufferSize,\r
	209	OUT VOID *Buffer\r
	210	);\r
	211	\r
	212	///\r
	213	/// EFI_PEI_RECOVERY_BLOCK_IO_PPI provides the services that are required\r
	214	/// to access a block I/O device during PEI recovery boot mode.\r
	215	///\r
	216	struct _EFI_PEI_RECOVERY_BLOCK_IO_PPI {\r
	217	///\r
	218	/// Gets the number of block I/O devices that the specific block driver manages.\r
	219	///\r
	220	EFI_PEI_GET_NUMBER_BLOCK_DEVICES GetNumberOfBlockDevices;\r
	221	\r
	222	///\r
	223	/// Gets the specified media information.\r
	224	///\r
	225	EFI_PEI_GET_DEVICE_MEDIA_INFORMATION GetBlockDeviceMediaInfo;\r
	226	\r
	227	///\r
	228	/// Reads the requested number of blocks from the specified block device.\r
	229	///\r
	230	EFI_PEI_READ_BLOCKS ReadBlocks;\r
	231	};\r
	232	\r
	233	extern EFI_GUID gEfiPeiVirtualBlockIoPpiGuid;\r
	234	\r
	235	#endif\r