BlockFront.c File Reference

#include <Library/PrintLib.h>
#include <Library/DebugLib.h>
#include "BlockFront.h"
#include <IndustryStandard/Xen/io/protocols.h>
#include <IndustryStandard/Xen/io/xenbus.h>

Go to the source code of this file.

Functions
STATIC XENSTORE_STATUS	XenBusReadUint64 (IN XENBUS_PROTOCOL *This, IN CONST CHAR8 *Node, IN BOOLEAN FromBackend, OUT UINT64 *ValuePtr)
STATIC VOID	XenPvBlockFree (IN XEN_BLOCK_FRONT_DEVICE *Dev)
STATIC XENSTORE_STATUS	XenPvBlkWaitForBackendState (IN XEN_BLOCK_FRONT_DEVICE *Dev, IN XenbusState ExpectedState, OUT XenbusState *LastStatePtr OPTIONAL)
EFI_STATUS	XenPvBlockFrontInitialization (IN XENBUS_PROTOCOL *XenBusIo, IN CONST CHAR8 *NodeName, OUT XEN_BLOCK_FRONT_DEVICE **DevPtr)
VOID	XenPvBlockFrontShutdown (IN XEN_BLOCK_FRONT_DEVICE *Dev)
STATIC VOID	XenPvBlockWaitSlot (IN XEN_BLOCK_FRONT_DEVICE *Dev)
VOID	XenPvBlockAsyncIo (IN OUT XEN_BLOCK_FRONT_IO *IoData, IN BOOLEAN IsWrite)
EFI_STATUS	XenPvBlockIo (IN OUT XEN_BLOCK_FRONT_IO *IoData, IN BOOLEAN IsWrite)
STATIC VOID	XenPvBlockPushOperation (IN XEN_BLOCK_FRONT_DEVICE *Dev, IN UINT8 Operation, IN UINT64 Id)
VOID	XenPvBlockSync (IN XEN_BLOCK_FRONT_DEVICE *Dev)
VOID	XenPvBlockAsyncIoPoll (IN XEN_BLOCK_FRONT_DEVICE *Dev)

Detailed Description

Minimal block driver for Mini-OS.

Copyright (c) 2007-2008 Samuel Thibault. Copyright (C) 2014, Citrix Ltd. Copyright (c) 2014, Intel Corporation. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file BlockFront.c.

Function Documentation

XenBusReadUint64()

STATIC XENSTORE_STATUS XenBusReadUint64	(	IN XENBUS_PROTOCOL *	This,
		IN CONST CHAR8 *	Node,
		IN BOOLEAN	FromBackend,
		OUT UINT64 *	ValuePtr
	)

Helper to read an integer from XenStore.

If the number overflows according to the range defined by UINT64, then ASSERT().

Parameters

This	A pointer to a XENBUS_PROTOCOL instance.
Node	The XenStore node to read from.
FromBackend	Read frontend or backend value.
ValuePtr	Where to put the value.

Return values

XENSTORE_STATUS_SUCCESS

If successful, will update ValuePtr.

Returns

Any other return value indicate the error, ValuePtr is not updated in this case.

Definition at line 36 of file BlockFront.c.

XenPvBlkWaitForBackendState()

STATIC XENSTORE_STATUS XenPvBlkWaitForBackendState	(	IN XEN_BLOCK_FRONT_DEVICE *	Dev,
		IN XenbusState	ExpectedState,
		OUT XenbusState *LastStatePtr	OPTIONAL
	)

Wait until the backend has reached the ExpectedState.

Parameters

Dev	A XEN_BLOCK_FRONT_DEVICE instance.
ExpectedState	The backend state expected.
LastStatePtr	An optional pointer where to right the final state.

Returns

Return XENSTORE_STATUS_SUCCESS if the new backend state is ExpectedState or return an error otherwise.

Definition at line 102 of file BlockFront.c.

XenPvBlockAsyncIo()

VOID XenPvBlockAsyncIo	(	IN OUT XEN_BLOCK_FRONT_IO *	IoData,
		IN BOOLEAN	IsWrite
	)

Definition at line 494 of file BlockFront.c.

XenPvBlockAsyncIoPoll()

VOID XenPvBlockAsyncIoPoll

(

IN XEN_BLOCK_FRONT_DEVICE *

Dev

)

Definition at line 650 of file BlockFront.c.

XenPvBlockFree()

STATIC VOID XenPvBlockFree

(

IN XEN_BLOCK_FRONT_DEVICE *

Dev

)

Free an instance of XEN_BLOCK_FRONT_DEVICE.

Parameters

Dev	The instance to free.

Definition at line 69 of file BlockFront.c.

XenPvBlockFrontInitialization()

EFI_STATUS XenPvBlockFrontInitialization	(	IN XENBUS_PROTOCOL *	XenBusIo,
		IN CONST CHAR8 *	NodeName,
		OUT XEN_BLOCK_FRONT_DEVICE **	DevPtr
	)

Definition at line 151 of file BlockFront.c.

XenPvBlockFrontShutdown()

VOID XenPvBlockFrontShutdown

(

IN XEN_BLOCK_FRONT_DEVICE *

Dev

)

Definition at line 381 of file BlockFront.c.

XenPvBlockIo()

EFI_STATUS XenPvBlockIo	(	IN OUT XEN_BLOCK_FRONT_IO *	IoData,
		IN BOOLEAN	IsWrite
	)

Definition at line 569 of file BlockFront.c.

XenPvBlockPushOperation()

STATIC VOID XenPvBlockPushOperation	(	IN XEN_BLOCK_FRONT_DEVICE *	Dev,
		IN UINT8	Operation,
		IN UINT64	Id
	)

Definition at line 589 of file BlockFront.c.

XenPvBlockSync()

VOID XenPvBlockSync

(

IN XEN_BLOCK_FRONT_DEVICE *

Dev

)

Definition at line 626 of file BlockFront.c.

XenPvBlockWaitSlot()

STATIC VOID XenPvBlockWaitSlot

(

IN XEN_BLOCK_FRONT_DEVICE *

Dev

)

Definition at line 476 of file BlockFront.c.