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Storport driver HwFindAdapter.

OSR_Community_UserOSR_Community_User Member Posts: 110,217
Hello All,
Hi All,
I am modifying the Virtual miniport driver code into a storport miniport driver for a commerically available SAS HBA.

The following two steps work as expected:
1. INF file modification according to the hardware details - the driver files get installed on Win 7 and Windows registry reflects the correct details.
2. Driver entry routine is called and returns success.

Issues and questions:
1. For HwFindAdapter(), function has been modified to look like below:-
HwFindAdapter(IN PVOID PDevExt,
IN PVOID PHwContext,
IN PVOID PBusInformation,
IN PCHAR PArgumentString,

Values filled in as reported by WinDbg is shown below:
HwFindAdapter(void * PDevExt = 0x8d19b00c,
void * PHwContext = 0x00000000,
void * PBusInformation = 0x00000000,
char * PArgumentString = 0x8d19bd28 "PlaceHolder=0;",
struct _PORT_CONFIGURATION_INFORMATION * PConfigInfo = 0x8d193a88,
unsigned char * PBAgain = 0x80786683 "")

1) What can cause PHwContext, PBusInformation values to be 0x00000? How can I fix it?

2) IoRegisterdeviceInterface() at the end of HwFindAdapter function is failing since. PHwContext is 0x00000
The call is modified to be :
status = IoRegisterDeviceInterface((PDEVICE_OBJECT) PHwContext, &GUID_DEVCLASS_SCSIADAPTER,NULL,&pDevExt->DeviceInterface);

3) Since it is a commecial HBA, how do I get the memory map and capabilities values from the BAR.
I am getting BAR as follows:
pDevExt->RegisterBase =
(unsigned int *)StorPortGetDeviceBase(pDevExt,
pDevExt->RegisterBasePhys = AccessRange->RangeStart.LowPart;

How can I get HBA capabilities from this?

Thanks for your help.
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