[RFC] [PATCH V3 0/3] Add IOMMU support.

[Jiewen Yao <jiewen.yao@intel.com>]

================ V3 ==============
1) Add Remap capability (from Ard Biesheuvel)
Add EDKII_IOMMU_REMAP_ADDRESS API in IOMMU_PROTOCOL.

NOTE: The code is not fully validated yet.
The purpose is to collect feedback to decide the next step.

================ V2 ==============
1) Enhance Unmap() in PciIo (From Ruiyu Ni)
Maintain a local list of MapInfo and match it in Unmap.

2) CopyMem for ReadOperation in PciIo after SetAttribute (Leo Duran)
Fix a bug in V1 that copy mem for read happen before SetAttribute,
which will break AMD SEV solution.

================ V1 ==============

This patch series adds IOMMU protocol and updates the consumer
to support IOMMU based DMA access in UEFI.

This patch series can support the BmDmaLib request for AMD SEV.
submitted by Duran, Leo <leo.duran@amd.com> and Brijesh Singh <brijesh.ksingh@gmail.com>.
https://lists.01.org/pipermail/edk2-devel/2017-March/008109.html, and
https://lists.01.org/pipermail/edk2-devel/2017-March/008820.html.
We can have an AMD SEV specific IOMMU driver to produce IOMMU protocol,
and clear SEV in IOMMU->SetAttribute().

This patch series can also support Intel VTd based DMA protection,
requested by Jiewen Yao <jiewen.yao@intel.com>, discussed in
https://lists.01.org/pipermail/edk2-devel/2017-March/008157.html.
We can have an Intel VTd specific IOMMU driver to produce IOMMU protocol,
and update VTd engine to grant or deny access in IOMMU->SetAttribute().

This patch series does not provide a full Intel VTd driver, which
will be provide in other patch in the future.

The purpose of this patch series to review if this IOMMU protocol design
can meet all DMA access and management requirement.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Leo Duran <leo.duran@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>


Jiewen Yao (3):
  MdeModulePkg/Include: Add IOMMU protocol definition.
  MdeModulePkg/PciHostBridge: Add IOMMU support.
  MdeModulePkg/PciBus: Add IOMMU support.

 MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.c                    |  12 +
 MdeModulePkg/Bus/Pci/PciBusDxe/PciBus.h                    |  19 ++
 MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf               |   1 +
 MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c                     | 225 ++++++++++++-
 MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridge.c      |   3 +
 MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf |   1 +
 MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridge.h      |   8 +
 MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c    | 350 ++++++++++++++++++--
 MdeModulePkg/Include/Protocol/IoMmu.h                      | 196 +++++++++++
 MdeModulePkg/MdeModulePkg.dec                              |   3 +
 10 files changed, 772 insertions(+), 46 deletions(-)
 create mode 100644 MdeModulePkg/Include/Protocol/IoMmu.h

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2.7.4.windows.1