I find it hard to believe but it looks like there is no PassThru anything
on this system as LocateHandleBuffer returns nothing for ATA, SCSI or
ExtSCSI. Be nice if it was required by UEFI systems to provide that.
On Thu, Sep 5, 2013 at 5:05 PM, David F. <[email protected]> wrote:
> Hi,
>
> So I open a Block IO Protocol, also get the Device Path. Then do:
>
> EFI_STATUS OpenParentProtocol(EFI_DEVICE_PATH_PROTOCOL *devpath, EFI_GUID
> *protocolguid, void **protocolinterface)
>
> EFI_HANDLE devhandle;
> EFI_STATUS status=UEFI_BS->LocateDevicePath(protocolguid, &devpath,
> &devhandle);
>
> <...>
>
> but that always fails for both the ATA Pass Thru and the SCSI Ext Pass
> Thru. The system has both a SCSI adapter with a hard drive and SATA
> adapter with HD and DVD.
>
> I'll look if anything exists via the LocateHandleBuffer to see if anything
> exists at all .. but Is it common that you're not going to have a pass thru
> interface? Shouldn't the DevPath on the same handle as the opened Block
> IO Protocol be able to be used to find the pass thru interfaces?
>
> TIA!!
>
>
>
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