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OvmfPkg/PvScsiDxe: Setup requests and completions rings

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These rings are shared memory buffers between host and device in which
a cyclic buffer is managed to send request descriptors from host to
device and receive completion descriptors from device to host.

Note that because device may be constrained by IOMMU or guest may be run
under AMD SEV, we make sure to map these rings to device by using
PciIo->Map().

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2567
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Message-Id: <20200328200100.60786-14-liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Liran Alon
2020-03-28 23:00:56 +03:00
committed by mergify[bot]
parent 5269c26e07
commit b654edec03
3 changed files with 237 additions and 0 deletions
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OvmfPkg/PvScsiDxe/PvScsiDxe.inf
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@@ -26,6 +26,7 @@
OvmfPkg/OvmfPkg.dec
[LibraryClasses]
BaseLib
BaseMemoryLib
DebugLib
MemoryAllocationLib