ScsiPortNotification (NotificationType = NextRequest) 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 );
- NotificationType [in]
Specifies the type of notification. A NotificationType of NextRequest indicates that the miniport driver is ready for another request to a target that is not currently busy. This notification should be sent by the miniport driver as soon as the driver is ready for another request. Usually, this notification is sent from the HwScsiStartIo routine but, sometimes, from the HwScsiInterrupt (or HwScsiEnableInterruptsCallback) routine..
- 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.
For information about the effects of other notification types, see ScsiPortNotification.