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From: Andrew Fish <afish@apple.com>
To: "edk2-devel@lists.01.org" <edk2-devel@lists.01.org>
Subject: Re: Unable to Loacte EdkiiIoMmuProtocol.
Date: Mon, 27 Nov 2017 07:58:07 -0800	[thread overview]
Message-ID: <0FAC8B37-CAFD-47BD-99A4-3A8708AE1C23@apple.com> (raw)
In-Reply-To: <DM5PR11MB15787E1B3DCFFBAB125AF2B2DC250@DM5PR11MB1578.namprd11.prod.outlook.com>

Should drivers call gEdkiiIoMmuProtocolGuid directly or just use PciIo Protocol? 

Thanks,

Andrew Fish


> On Nov 27, 2017, at 3:24 AM, Amit kumar <akamit91@hotmail.com> wrote:
> 
> Hi.
> I am trying to allocate a mem buffer above 4Gb address but the allocation
> since i am unable to locate EdkiiIoMmuProtocol.
> 
> Status = gBS->LocateProtocol (&gEdkiiIoMmuProtocolGuid, NULL, (VOID **)&mIoMmuProtocol);
>      Status = mIoMmuProtocol->AllocateBuffer (
>                   mIoMmuProtocol,
>                   MaxAllocateType,
>                   EfiBootServicesData,
>                   1,
>                  HostAddress,
>                  EDKII_IOMMU_ATTRIBUTE_DUAL_ADDRESS_CYCLE
>                  );
> 
> 
> can somebody tell me the right way to do it. ?
> 
> 
> Best Regards
> Amit Kumar
> 
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel



      parent reply	other threads:[~2017-11-27 15:53 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-27 11:24 Unable to Loacte EdkiiIoMmuProtocol Amit kumar
2017-11-27 14:01 ` Yao, Jiewen
2017-11-27 15:58 ` Andrew Fish [this message]

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