MultipleRequestsPerLun – must be set to TRUE, and indicates that the miniport’s virtual adapter can queue multiple requests per logical unit. This routine is called by Storport to perform synchronous operations that control the state or the behavior of the adapter. Reginfo routine is called to obtain information about the data and event blocks to be registered on behalf of the miniport driver by the SCSI port driver. This can sometimes be a pain for users who implement ScsiPassThrough, due to the fact that their requests will fail if the input buffers are not correctly aligned. A miniport- provided callback that is called after a notification from Stor.
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No need to be fancy, just an overview. This all probably seems pretty easy and obvious, except for one thing.
Difference Between Storport And Miniport Driver – aktivvector
This can sometimes be a pain for users who implement ScsiPassThrough, due to the fact that their requests will fail if the input buffers are not correctly aligned. Are we performing the operation or are we passing the request to some other entity to perform the operation e.
In the Marvell MV91xx driver package there are two difefrence, storport and miniport. There are no open issues. We call our driver, developed for ztorport model, a miniport driver. As with any development project, behween good project begins with a good design. Are the resources that we’re exporting accessible locally or remotely? As for what we do in this routine, it again depends upon the architecture of our miniport. A virtual miniport driver can use other APIs such as those that the kernel provides, as long as the virtual miniport driver observes restrictions applying to WDM drivers.
Dma64BitAddresses – this field has no meaning for a virtual Storport miniport. One thing that it does not provide is help in hardware management we’re implementing a virtual miniport remember! Control routine is called to enable or disable notification of events, or to enable or disable data collection for data blocks that the miniport driver designated as expensive to collect.
This function is the one that indicates to our miniport which SCSI operation is requested for the specified virtual device. An SRB being initiated does not dirference completed. This is the routine where we’ll register our miniport with Storport. Now that we’ve gotten some of the design issues out in the open, it is time to discuss the driver itself.
Storport’s Interface with Storport Miniport Drivers
This topic, which is too big to be described by just one The NT Andd article, will be discussed over a series of articles and will culminate in the presentation of a fully functional Storport virtual miniport driver.
Reginfo routine is called to obtain information about the data and event blocks to be registered on behalf of the miniport driver by the SCSI port driver.
This first article in the series describes the architecture, flow of control, and key routines to be implemented when developing a virtual miniport.
In addition, the miniport driver would not have to synchronize the execution storporrt its HwStartIo and interrupt service routines which a virtual Storport miniport would not have in the first place. Interrupt routine after the HBA generates an interrupt request.
Master – setting this field to TRUE indicates that our miniport’s virtual adapter is a bus master device. In addition, if the resource is accessed across the network or via some other remote mechanism, we must consider the possibility that we may lose access to our device. While this may sound daunting, remember that as a virtual miniport you have betqeen full set of Kernel APIs and other drivers in the system to help you perform your work. Went back to the miniport driver and it is fine.
Storport driver miniport routines
ScsiRestartAdapter – this operations is requested when Storport wants to reinitialize the virtual adapter.
If remotely, how do we get to it? This space is allocated from non-paged pool.
When working with the Storport model, we develop a driver that interfaces to the Storport driver Storport. If the Storport version of the miniport driver cannot handle a request at the time it is submitted, it has a set of queue management minipport, not available to the SCSI port version, that allow it to deal with the overload.
Can someone tell me what the difference is?
Again, this is not unlike how a normal driver handles an IRP. How the virtual adapter is initialized will depend upon the design of the miniport being developed.