* Unable to Loacte EdkiiIoMmuProtocol.
@ 2017-11-27 11:24 Amit kumar
2017-11-27 14:01 ` Yao, Jiewen
2017-11-27 15:58 ` Andrew Fish
0 siblings, 2 replies; 3+ messages in thread
From: Amit kumar @ 2017-11-27 11:24 UTC (permalink / raw)
To: edk2-devel@lists.01.org
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Unable to Loacte EdkiiIoMmuProtocol.
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
1 sibling, 0 replies; 3+ messages in thread
From: Yao, Jiewen @ 2017-11-27 14:01 UTC (permalink / raw)
To: Amit kumar, edk2-devel@lists.01.org
You need include a driver to produce gEdkiiIoMmuProtocolGuid.
One sample is IntelSiliconPkg\Feature\VTd\IntelVTdDxe
Thank you
Yao Jiewen
> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Amit
> kumar
> Sent: Monday, November 27, 2017 7:24 PM
> To: edk2-devel@lists.01.org
> Subject: [edk2] Unable to Loacte EdkiiIoMmuProtocol.
>
> 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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Unable to Loacte EdkiiIoMmuProtocol.
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
1 sibling, 0 replies; 3+ messages in thread
From: Andrew Fish @ 2017-11-27 15:58 UTC (permalink / raw)
To: edk2-devel@lists.01.org
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
^ permalink raw reply [flat|nested] 3+ messages in thread
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