Since we are implementing a virtual adapter, we can set this to any value we want, however being less restrictive is probably best. That other driver could be for some special device that exports both network and SCSI functionality and exists as a virtual bus driver which creates a virtual PDO that our miniport will be loaded to handle. So, again, the operations we perform depend upon the device that our driver exports. If this is not set to TRUE, the virtual adapter will not fully initialize. NumberOfBuses – this needs to be set to indicate the number of buses that Storport will need to query looking for connected devices. ScsiStopAdapter – this operation is requested when Storport wants to shutdown the virtual adapter ScsiRestartAdapter – this operations is requested when Storport wants to reinitialize the virtual adapter ScsiSetBootConfig – this operation is requested when Storport wants to restore any settings on a SMD that the BIOS might need to reboot.
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For more information about the Storport driver, see Storage Port Drivers. As with any other type of Windows driver, we are responsible for propagating our own execution.
As with any development project, a good project begins with a good design. While it may be obvious to some, our design is going to based upon how we get access to the resource that our virtual adapter is going to be exporting as a storpoft SCSI device. If the request can be processed asynchronously, then our driver has to provide the means for this to be accomplished.
The virtual miniport driver must map all data buffers into virtual address space. ScsiStopAdapter – this operation is requested when Storport wants to shutdown the virtual adapter ScsiRestartAdapter – this operations is requested when Storport wants to reinitialize the virtual adapter ScsiSetBootConfig – this operation is requested when Storport wants to restore any settings on a SMD that the BIOS might need to reboot.
If the driver is already installed and you want to install an updated driver, follow these steps. If storort the other hand our devices are dynamic, then we’ll need to have a way to know when those dynamic devices have arrived or have departed, and notify Storport of those occurrences. Thus, it’s important that we do not zero it.
This topic, which is too big to be described by just one The NT Insider article, will be discussed over a series of articles and will culminate in the presentation of a fully functional Storport virtual miniport driver.
HwInitialize This routine is called after HwStorFindAdapter successfully returns and its purpose is to initialize the miniport and to find all devices that are of interest to it. QLogic Technical Support can be reached by the following methods:. If the resource is local then we’ll have to decide whether we can use kernel APIs to access the resource Zw calls, memory accesses, or IRP based requestsor if we have to communicate with a user mode application or service to get access to the resource.
These fields jiniport be supplied etorport are not required for a SMD. Which is better to design Storport or scsi port for a storage controller? Thank your native deity at minioort point, because when our HwStartIo function is called, it is not expecting the input SRB to be completed synchronously.
Stoport This routine is called by Storport to perform synchronous operations that control the state or the behavior of the adapter. Since we are implementing a virtual adapter, we can set this to xtorport value we want, however being less restrictive is probably best. The SRB, defined in Figure 4, contains a function code field which indicates the function to perform.
If remotely, how do we get to it? The driver performs the operation described in the SRB, puts the completion status into the SRB, and then notifies Storport when the request sttorport completed. storoprt
A few more queries. Again, this is not unlike how a normal driver handles an IRP.
For those of you who have never worked with Storport before let’s go over some basics. These optional interfaces listed below may be necessary depending upon the architecture of minipogt miniport.
Storport Miniport Drivers
This all probably seems pretty easy and obvious, except for one thing. Now that we’ve gotten some of the design issues out in the open, it is time to discuss the driver itself.
I have both storport. Are the resources that we’re exporting accessible locally or remotely?
windows – Storport Miniport driver – Stack Overflow
We register this structure with Storport via a call to StorportInitialize. A Storport miniport driver must conform to defined Storport rules in order to provide the services that the adapter, whether stor;ort or physical, offers to the operating system. To install an updated version of the driver, follow the procedure provided for your Windows version.
ScsiStopAdapter – this operation is requested when Storport wants to shutdown the virtual adapter.