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HwScsiTimer routine

HwScsiTimer is called after the interval specified when the miniport driver called ScsiPortNotification with the RequestTimerCallNotificationType value.

Syntax

C++


PHW_TIMER HwScsiTimer;

VOID HwScsiTimer(
  _In_  PVOID DeviceExtension
)
{ ... }

Parameters

DeviceExtension [in]: Points to the miniport driver's per-HBA storage area.

Return value

None.

Remarks

A miniport driver that does not have an HwScsiInterrupt routine because it manages all HBA I/O operations by polling should have an HwScsiTimer routine.

A miniport driver should use HwScsiTimer instead of ScsiPortStallExecution whenever a wait longer than a millisecond is required.

The name HwScsiTimer is just a placeholder. The actual prototype of this routine is defined in srb.h as follows:


typedef
VOID
(*PHW_TIMER) (
  IN PVOID  DeviceExtension
  );

For a discussion of when and how to use HwScsiTimer see SCSI Miniport Driver's HwScsiTimer Routine.

A HwScsiTimer routine is optional.

Requirements