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MdeModulePkg/PciHostBridge: Add IOMMU support.

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If IOMMU protocol is installed, PciHostBridge just calls
IOMMU AllocateBuffer/FreeBuffer/Map/Unmap.

PciHostBridge does not set IOMMU access attribute,
because it does not know which device request the DMA.
This work is done by PciBus driver.

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>

Previous patch Tested-by: Brijesh Singh <brijesh.singh@amd.com>
Previous patch Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Leo Duran <leo.duran@amd.com>
This commit is contained in:
Jiewen Yao
2017-04-29 16:23:58 +08:00
parent d1fddc4533
commit c15da8eb35
4 changed files with 102 additions and 0 deletions
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2
MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
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@@ -41,6 +41,7 @@
BaseMemoryLib
BaseLib
PciSegmentLib
UefiLib
PciHostBridgeLib
[Protocols]
@@ -49,6 +50,7 @@
gEfiDevicePathProtocolGuid ## BY_START
gEfiPciRootBridgeIoProtocolGuid ## BY_START
gEfiPciHostBridgeResourceAllocationProtocolGuid ## BY_START
gEdkiiIoMmuProtocolGuid ## SOMETIMES_CONSUMES
[Depex]
gEfiCpuIo2ProtocolGuid AND