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ScsiPortNotification (NotificationType = RequestTimerCall) routine

The ScsiPortNotification routine informs the operating system-specific port driver of certain events, such as when a miniport driver completes a request or is ready to start another SRB, as well as when the HBA indicates certain SCSI error conditions that occurred during an operation.


VOID ScsiPortNotification(
  _In_     SCSI_NOTIFICATION_TYPE NotificationType,
  _In_     PVOID                  HwDeviceExtension,
  _In_opt_ PHW_TIMER              HwScsiTimer,
  _In_opt_ ULONG                  MiniportTimerValue


NotificationType [in]

Specifies the type of notification. A NotificationType of RequestTimerCall indicates that the miniport driver requires the operating system-specific port driver to call the miniport driver's HwScsiTimer routine in the requested number of microseconds. If this value is set, ScsiPortNotification requires two additional parameters: (1) the entry point for the miniport driver's HwScsiTimer routine, and (2) a MiniportTimerValue interval, in microseconds. Note that the resolution of the system timer is approximately 10 milliseconds..

HwDeviceExtension [in]

Pointer to the hardware device extension. This is a per-HBA storage area that the port driver allocates and initializes on behalf of the miniport driver. Miniport drivers usually store HBA-specific information in this extension, such as the state of the HBA and the HBA's mapped access ranges. This area is available to the miniport driver in the DeviceExtension->HwDeviceExtension member of the HBA's device object immediately after the miniport driver calls ScsiPortInitialize. The port driver frees this memory when it removes the device.

HwScsiTimer [in, optional]

Pointer to a timer routine that is called after the interval specified in MiniportTimerValue. This parameter is optional.

MiniportTimerValue [in, optional]

Indicates the interval after which the timer routine pointed to by HwScsiTimer is called. This parameter is optional.

Return value



For information about the effects of other notification types, see ScsiPortNotification.


Target platform



Srb.h (include Miniport.h or Scsi.h)

See also




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