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. More...
NTSTATUS	cbm_execute_readwrite (IN PDEVICE_EXTENSION Pdx, IN PIRP Irp)
	Executes reads from or writes to the driver. More...

Detailed Description

Perform reading from and writing to the driver.

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Author

Spiro Trikaliotis

Definition in file readwrite.c.

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 178 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 84 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().