StorPortNotification for BusChangeDetected routine
A miniport uses the BusChangeDetected notification to indicate that a target device might have been added or removed from a dynamic bus.
VOID StorPortNotification( _In_ SCSI_NOTIFICATION_TYPE NotificationType, _In_ PVOID HwDeviceExtension, _In_opt_ UCHAR PathId );
- NotificationType [in]
Specifies the BusChangeDetected notification type. The BusChangeDetected notification uses the additional parameter of PathId.
- HwDeviceExtension [in]
A 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 mapped access ranges for the HBA. This area is available to the miniport driver immediately after the miniport driver calls StorPortInitialize. The port driver frees this memory when it removes the device.
- PathId [in, optional]
Indicates the SCSI port or bus where the change was detected.
After this notification is sent, the Storport driver enumerates the bus again by issuing INQUIRY commands. Bus enumeration is time-consuming and uses significant bus bandwidth, so a miniport driver should not send this notification unnecessarily.
For information about the effects of other notification types, see StorPortNotification.