You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
224 lines
9.1 KiB
224 lines
9.1 KiB
4 years ago
|
/** @file
|
||
|
|
Provides the services required to access a block I/O 2 device during PEI recovery
|
||
|
|
boot mode.
|
||
|
|
|
||
|
|
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
|
||
|
|
This program and the accompanying materials are licensed and made available under
|
||
|
|
the terms and conditions of the BSD License that 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.
|
||
|
|
|
||
|
|
@par Revision Reference:
|
||
|
|
This PPI is defined in UEFI Platform Initialization Specification 1.4 Volume 1:
|
||
|
|
Pre-EFI Initalization Core Interface.
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#ifndef _PEI_BLOCK_IO2_H_
|
||
|
|
#define _PEI_BLOCK_IO2_H_
|
||
|
|
|
||
|
|
#include <Ppi/BlockIo.h>
|
||
|
|
#include <Protocol/DevicePath.h>
|
||
|
|
|
||
|
|
///
|
||
|
|
/// Global ID for EFI_PEI_RECOVERY_BLOCK_IO2_PPI
|
||
|
|
///
|
||
|
|
#define EFI_PEI_RECOVERY_BLOCK_IO2_PPI_GUID \
|
||
|
|
{ \
|
||
|
|
0x26cc0fad, 0xbeb3, 0x478a, { 0x91, 0xb2, 0xc, 0x18, 0x8f, 0x72, 0x61, 0x98 } \
|
||
|
|
}
|
||
|
|
|
||
|
|
///
|
||
|
|
/// The forward declaration for EFI_PEI_RECOVERY_BLOCK_IO_PPI.
|
||
|
|
///
|
||
|
|
typedef struct _EFI_PEI_RECOVERY_BLOCK_IO2_PPI EFI_PEI_RECOVERY_BLOCK_IO2_PPI;
|
||
|
|
|
||
|
|
#define EFI_PEI_RECOVERY_BLOCK_IO2_PPI_REVISION 0x00010000
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
///
|
||
|
|
/// A type of interface that the device being referenced by DeviceIndex is
|
||
|
|
/// attached to. This field re-uses Messaging Device Path Node sub-type values
|
||
|
|
/// as defined by Section 9.3.5 Messaging Device Path of UEFI Specification.
|
||
|
|
/// When more than one sub-type is associated with the interface, sub-type with
|
||
|
|
/// the smallest number must be used.
|
||
|
|
///
|
||
|
|
UINT8 InterfaceType;
|
||
|
|
///
|
||
|
|
/// A flag that indicates if media is removable.
|
||
|
|
///
|
||
|
|
BOOLEAN RemovableMedia;
|
||
|
|
///
|
||
|
|
/// A flag that indicates if media is present. This flag is always set for
|
||
|
|
/// non-removable media devices.
|
||
|
|
///
|
||
|
|
BOOLEAN MediaPresent;
|
||
|
|
///
|
||
|
|
/// A flag that indicates if media is read-only.
|
||
|
|
///
|
||
|
|
BOOLEAN ReadOnly;
|
||
|
|
///
|
||
|
|
/// The size of a logical block in bytes.
|
||
|
|
///
|
||
|
|
UINT32 BlockSize;
|
||
|
|
///
|
||
|
|
/// The last logical block that the device supports.
|
||
|
|
///
|
||
|
|
EFI_PEI_LBA LastBlock;
|
||
|
|
} EFI_PEI_BLOCK_IO2_MEDIA;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Gets the count of block I/O devices that one specific block driver detects.
|
||
|
|
|
||
|
|
This function is used for getting the count of block I/O devices that one
|
||
|
|
specific block driver detects. To the PEI ATAPI driver, it returns the number
|
||
|
|
of all the detected ATAPI devices it detects during the enumeration process.
|
||
|
|
To the PEI legacy floppy driver, it returns the number of all the legacy
|
||
|
|
devices it finds during its enumeration process. If no device is detected,
|
||
|
|
then the function will return zero.
|
||
|
|
|
||
|
|
@param[in] PeiServices General-purpose services that are available
|
||
|
|
to every PEIM.
|
||
|
|
@param[in] This Indicates the EFI_PEI_RECOVERY_BLOCK_IO2_PPI
|
||
|
|
instance.
|
||
|
|
@param[out] NumberBlockDevices The number of block I/O devices discovered.
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS The operation performed successfully.
|
||
|
|
|
||
|
|
**/
|
||
|
|
typedef
|
||
|
|
EFI_STATUS
|
||
|
|
(EFIAPI *EFI_PEI_GET_NUMBER_BLOCK_DEVICES2)(
|
||
|
|
IN EFI_PEI_SERVICES **PeiServices,
|
||
|
|
IN EFI_PEI_RECOVERY_BLOCK_IO2_PPI *This,
|
||
|
|
OUT UINTN *NumberBlockDevices
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
Gets a block device's media information.
|
||
|
|
|
||
|
|
This function will provide the caller with the specified block device's media
|
||
|
|
information. If the media changes, calling this function will update the media
|
||
|
|
information accordingly.
|
||
|
|
|
||
|
|
@param[in] PeiServices General-purpose services that are available to every
|
||
|
|
PEIM
|
||
|
|
@param[in] This Indicates the EFI_PEI_RECOVERY_BLOCK_IO2_PPI instance.
|
||
|
|
@param[in] DeviceIndex Specifies the block device to which the function wants
|
||
|
|
to talk. Because the driver that implements Block I/O
|
||
|
|
PPIs will manage multiple block devices, the PPIs that
|
||
|
|
want to talk to a single device must specify the
|
||
|
|
device index that was assigned during the enumeration
|
||
|
|
process. This index is a number from one to
|
||
|
|
NumberBlockDevices.
|
||
|
|
@param[out] MediaInfo The media information of the specified block media.
|
||
|
|
The caller is responsible for the ownership of this
|
||
|
|
data structure.
|
||
|
|
|
||
|
|
@par Note:
|
||
|
|
The MediaInfo structure describes an enumeration of possible block device
|
||
|
|
types. This enumeration exists because no device paths are actually passed
|
||
|
|
across interfaces that describe the type or class of hardware that is publishing
|
||
|
|
the block I/O interface. This enumeration will allow for policy decisions
|
||
|
|
in the Recovery PEIM, such as "Try to recover from legacy floppy first,
|
||
|
|
LS-120 second, CD-ROM third." If there are multiple partitions abstracted
|
||
|
|
by a given device type, they should be reported in ascending order; this
|
||
|
|
order also applies to nested partitions, such as legacy MBR, where the
|
||
|
|
outermost partitions would have precedence in the reporting order. The
|
||
|
|
same logic applies to systems such as IDE that have precedence relationships
|
||
|
|
like "Master/Slave" or "Primary/Secondary". The master device should be
|
||
|
|
reported first, the slave second.
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS Media information about the specified block device
|
||
|
|
was obtained successfully.
|
||
|
|
@retval EFI_DEVICE_ERROR Cannot get the media information due to a hardware
|
||
|
|
error.
|
||
|
|
|
||
|
|
**/
|
||
|
|
typedef
|
||
|
|
EFI_STATUS
|
||
|
|
(EFIAPI *EFI_PEI_GET_DEVICE_MEDIA_INFORMATION2)(
|
||
|
|
IN EFI_PEI_SERVICES **PeiServices,
|
||
|
|
IN EFI_PEI_RECOVERY_BLOCK_IO2_PPI *This,
|
||
|
|
IN UINTN DeviceIndex,
|
||
|
|
OUT EFI_PEI_BLOCK_IO2_MEDIA *MediaInfo
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
Reads the requested number of blocks from the specified block device.
|
||
|
|
|
||
|
|
The function reads the requested number of blocks from the device. All the
|
||
|
|
blocks are read, or an error is returned. If there is no media in the device,
|
||
|
|
the function returns EFI_NO_MEDIA.
|
||
|
|
|
||
|
|
@param[in] PeiServices General-purpose services that are available to
|
||
|
|
every PEIM.
|
||
|
|
@param[in] This Indicates the EFI_PEI_RECOVERY_BLOCK_IO2_PPI instance.
|
||
|
|
@param[in] DeviceIndex Specifies the block device to which the function wants
|
||
|
|
to talk. Because the driver that implements Block I/O
|
||
|
|
PPIs will manage multiple block devices, PPIs that
|
||
|
|
want to talk to a single device must specify the device
|
||
|
|
index that was assigned during the enumeration process.
|
||
|
|
This index is a number from one to NumberBlockDevices.
|
||
|
|
@param[in] StartLBA The starting logical block address (LBA) to read from
|
||
|
|
on the device
|
||
|
|
@param[in] BufferSize The size of the Buffer in bytes. This number must be
|
||
|
|
a multiple of the intrinsic block size of the device.
|
||
|
|
@param[out] Buffer A pointer to the destination buffer for the data.
|
||
|
|
The caller is responsible for the ownership of the
|
||
|
|
buffer.
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS The data was read correctly from the device.
|
||
|
|
@retval EFI_DEVICE_ERROR The device reported an error while attempting
|
||
|
|
to perform the read operation.
|
||
|
|
@retval EFI_INVALID_PARAMETER The read request contains LBAs that are not
|
||
|
|
valid, or the buffer is not properly aligned.
|
||
|
|
@retval EFI_NO_MEDIA There is no media in the device.
|
||
|
|
@retval EFI_BAD_BUFFER_SIZE The BufferSize parameter is not a multiple of
|
||
|
|
the intrinsic block size of the device.
|
||
|
|
|
||
|
|
**/
|
||
|
|
typedef
|
||
|
|
EFI_STATUS
|
||
|
|
(EFIAPI *EFI_PEI_READ_BLOCKS2)(
|
||
|
|
IN EFI_PEI_SERVICES **PeiServices,
|
||
|
|
IN EFI_PEI_RECOVERY_BLOCK_IO2_PPI *This,
|
||
|
|
IN UINTN DeviceIndex,
|
||
|
|
IN EFI_PEI_LBA StartLBA,
|
||
|
|
IN UINTN BufferSize,
|
||
|
|
OUT VOID *Buffer
|
||
|
|
);
|
||
|
|
|
||
|
|
///
|
||
|
|
/// EFI_PEI_RECOVERY_BLOCK_IO_PPI provides the services that are required
|
||
|
|
/// to access a block I/O device during PEI recovery boot mode.
|
||
|
|
///
|
||
|
|
struct _EFI_PEI_RECOVERY_BLOCK_IO2_PPI {
|
||
|
|
///
|
||
|
|
/// The revision to which the interface adheres.
|
||
|
|
/// All future revisions must be backwards compatible.
|
||
|
|
///
|
||
|
|
UINT64 Revision;
|
||
|
|
///
|
||
|
|
/// Gets the number of block I/O devices that the specific block driver manages.
|
||
|
|
///
|
||
|
|
EFI_PEI_GET_NUMBER_BLOCK_DEVICES2 GetNumberOfBlockDevices;
|
||
|
|
|
||
|
|
///
|
||
|
|
/// Gets the specified media information.
|
||
|
|
///
|
||
|
|
EFI_PEI_GET_DEVICE_MEDIA_INFORMATION2 GetBlockDeviceMediaInfo;
|
||
|
|
|
||
|
|
///
|
||
|
|
/// Reads the requested number of blocks from the specified block device.
|
||
|
|
///
|
||
|
|
EFI_PEI_READ_BLOCKS2 ReadBlocks;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern EFI_GUID gEfiPeiVirtualBlockIo2PpiGuid;
|
||
|
|
|
||
|
|
#endif
|