readwrite.c File Reference

Perform reading from and writing to the driver. More...

#include <wdm.h>
#include "cbm_driver.h"
#include "iec.h"

Go to the source code of this file.

Functions
NTSTATUS	cbm_readwrite (IN PDEVICE_OBJECT Fdo, IN PIRP Irp)
	Services reads from or writes to the driver.
NTSTATUS	cbm_execute_readwrite (IN PDEVICE_EXTENSION Pdx, IN PIRP Irp)
	Executes reads from or writes to the driver.

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Detailed Description

Perform reading from and writing to the driver.

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Author:

Spiro Trikaliotis

Version:

Id

readwrite.c,v 1.22 2006/03/04 13:54:46 trikalio Exp

Definition in file readwrite.c.

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Function Documentation

NTSTATUS cbm_execute_readwrite (  IN PDEVICE_EXTENSION  Pdx, IN PIRP  Irp )

Executes reads from or writes to the driver. Services reads from or writes to the driver Parameters: Pdx  Pointer to the DEVICE_EXTENSION structure. Irp  Pointer to an IRP structure that describes the requested I/O operation. Returns: If the routine succeeds, it returns STATUS_SUCCESS. Otherwise, it return one of the error status values. This function does not perform any validity checks on the input and output buffer! This should already been done in cbm_readwrite. Todo: Remove this, is this does not make sense. Definition at line 179 of file readwrite.c. References cbmiec_raw_read(), cbmiec_raw_write(), DBG_ASSERT, DBG_ERROR, DBG_IRPPATH_EXECUTE, DBG_PREFIX, FUNC_ENTER, PERF_EVENT_READ_EXECUTE, PERF_EVENT_WRITE_EXECUTE, and QueueCompleteIrp(). Referenced by cbm_startio().

NTSTATUS cbm_readwrite (  IN PDEVICE_OBJECT  Fdo, IN PIRP  Irp )

Services reads from or writes to the driver. Services reads from or writes to the driver Parameters: Fdo  Pointer to a DEVICE_OBJECT structure. This is the device object for the target device, previously created by the driver's AddDevice routine. Irp  Pointer to an IRP structure that describes the requested I/O operation. Returns: If the routine succeeds, it returns STATUS_SUCCESS. Otherwise, it return one of the error status values. The driver's DriverEntry routine stored this routine's address in DriverObject->MajorFunction[IRP_MJ_READ] and DriverObject->MajorFunction[IRP_MJ_WRITE]. Generally, all Dispatch routines execute in an arbitrary thread context at IRQL PASSIVE_LEVEL, but there are exceptions. Definition at line 85 of file readwrite.c. References DBG_ASSERT, DBG_IRPPATH_PROCESS, FUNC_ENTER, PERF_EVENT_READ_QUEUE, PERF_EVENT_WRITE_QUEUE, QueueCompleteIrp(), and QueueStartPacket(). Referenced by DriverCommonInit().

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