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| author | Brijesh Singh <brijesh.singh@amd.com> | 2017-08-23 06:57:19 -0400 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2017-08-25 10:42:19 +0200 |
| commit | 4b725858de68422e5f3543c1c052f61447e9969c (patch) | |
| tree | 2f63aa4b2f14a8a936ec43346d9c1571477172b5 /OvmfPkg | |
| parent | b0338c53297cfbabd727f36c4878379c86cf4ddc (diff) | |
| download | edk2-4b725858de68422e5f3543c1c052f61447e9969c.tar.gz edk2-4b725858de68422e5f3543c1c052f61447e9969c.tar.bz2 edk2-4b725858de68422e5f3543c1c052f61447e9969c.zip | |
OvmfPkg/VirtioLib: change the parameter of VirtioAppendDesc() to UINT64
The patch change the "BufferPhysAddr" parameter of VirtioAppendDesc()
from type UINTN to UINT64.
UINTN is appropriate as long as we pass system memory references. After
the introduction of bus master device addresses, that's no longer the case
in general. Should we implement "real" IOMMU support at some point, UINTN
could break in 32-bit builds of OVMF.
Suggested-by: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
[lersek@redhat.com: clarify commit message]
[lersek@redhat.com: balance parens in VirtioAppendDesc() comment blocks]
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/Include/Library/VirtioLib.h | 35 | ||||
| -rw-r--r-- | OvmfPkg/Library/VirtioLib/VirtioLib.c | 38 |
2 files changed, 37 insertions, 36 deletions
diff --git a/OvmfPkg/Include/Library/VirtioLib.h b/OvmfPkg/Include/Library/VirtioLib.h index 547b4ee497..bca58cdeb2 100644 --- a/OvmfPkg/Include/Library/VirtioLib.h +++ b/OvmfPkg/Include/Library/VirtioLib.h @@ -151,33 +151,34 @@ VirtioPrepare ( The caller is responsible for initializing *Indices with VirtioPrepare()
first.
- @param[in,out] Ring The virtio ring to append the buffer to, as a
- descriptor.
+ @param[in,out] Ring The virtio ring to append the buffer to,
+ as a descriptor.
- @param[in] BufferPhysAddr (Guest pseudo-physical) start address of the
- transmit / receive buffer.
+ @param[in] BufferDeviceAddress (Bus master device) start address of the
+ transmit / receive buffer.
- @param[in] BufferSize Number of bytes to transmit or receive.
+ @param[in] BufferSize Number of bytes to transmit or receive.
- @param[in] Flags A bitmask of VRING_DESC_F_* flags. The caller
- computes this mask dependent on further buffers to
- append and transfer direction.
- VRING_DESC_F_INDIRECT is unsupported. The
- VRING_DESC.Next field is always set, but the host
- only interprets it dependent on VRING_DESC_F_NEXT.
+ @param[in] Flags A bitmask of VRING_DESC_F_* flags. The
+ caller computes this mask dependent on
+ further buffers to append and transfer
+ direction. VRING_DESC_F_INDIRECT is
+ unsupported. The VRING_DESC.Next field is
+ always set, but the host only interprets
+ it dependent on VRING_DESC_F_NEXT.
- @param[in,out] Indices Indices->HeadDescIdx is not accessed.
- On input, Indices->NextDescIdx identifies the next
- descriptor to carry the buffer. On output,
- Indices->NextDescIdx is incremented by one, modulo
- 2^16.
+ @param[in,out] Indices Indices->HeadDescIdx is not accessed.
+ On input, Indices->NextDescIdx identifies
+ the next descriptor to carry the buffer.
+ On output, Indices->NextDescIdx is
+ incremented by one, modulo 2^16.
**/
VOID
EFIAPI
VirtioAppendDesc (
IN OUT VRING *Ring,
- IN UINTN BufferPhysAddr,
+ IN UINT64 BufferDeviceAddress,
IN UINT32 BufferSize,
IN UINT16 Flags,
IN OUT DESC_INDICES *Indices
diff --git a/OvmfPkg/Library/VirtioLib/VirtioLib.c b/OvmfPkg/Library/VirtioLib/VirtioLib.c index 40ea17dfaf..b94f2dd7cb 100644 --- a/OvmfPkg/Library/VirtioLib/VirtioLib.c +++ b/OvmfPkg/Library/VirtioLib/VirtioLib.c @@ -189,7 +189,6 @@ VirtioPrepare ( Indices->NextDescIdx = Indices->HeadDescIdx;
}
-
/**
Append a contiguous buffer for transmission / reception via the virtio ring.
@@ -205,33 +204,34 @@ VirtioPrepare ( The caller is responsible for initializing *Indices with VirtioPrepare()
first.
- @param[in,out] Ring The virtio ring to append the buffer to, as a
- descriptor.
+ @param[in,out] Ring The virtio ring to append the buffer to,
+ as a descriptor.
- @param[in] BufferPhysAddr (Guest pseudo-physical) start address of the
- transmit / receive buffer.
+ @param[in] BufferDeviceAddress (Bus master device) start address of the
+ transmit / receive buffer.
- @param[in] BufferSize Number of bytes to transmit or receive.
+ @param[in] BufferSize Number of bytes to transmit or receive.
- @param[in] Flags A bitmask of VRING_DESC_F_* flags. The caller
- computes this mask dependent on further buffers to
- append and transfer direction.
- VRING_DESC_F_INDIRECT is unsupported. The
- VRING_DESC.Next field is always set, but the host
- only interprets it dependent on VRING_DESC_F_NEXT.
+ @param[in] Flags A bitmask of VRING_DESC_F_* flags. The
+ caller computes this mask dependent on
+ further buffers to append and transfer
+ direction. VRING_DESC_F_INDIRECT is
+ unsupported. The VRING_DESC.Next field is
+ always set, but the host only interprets
+ it dependent on VRING_DESC_F_NEXT.
- @param[in,out] Indices Indices->HeadDescIdx is not accessed.
- On input, Indices->NextDescIdx identifies the next
- descriptor to carry the buffer. On output,
- Indices->NextDescIdx is incremented by one, modulo
- 2^16.
+ @param[in,out] Indices Indices->HeadDescIdx is not accessed.
+ On input, Indices->NextDescIdx identifies
+ the next descriptor to carry the buffer.
+ On output, Indices->NextDescIdx is
+ incremented by one, modulo 2^16.
**/
VOID
EFIAPI
VirtioAppendDesc (
IN OUT VRING *Ring,
- IN UINTN BufferPhysAddr,
+ IN UINT64 BufferDeviceAddress,
IN UINT32 BufferSize,
IN UINT16 Flags,
IN OUT DESC_INDICES *Indices
@@ -240,7 +240,7 @@ VirtioAppendDesc ( volatile VRING_DESC *Desc;
Desc = &Ring->Desc[Indices->NextDescIdx++ % Ring->QueueSize];
- Desc->Addr = BufferPhysAddr;
+ Desc->Addr = BufferDeviceAddress;
Desc->Len = BufferSize;
Desc->Flags = Flags;
Desc->Next = Indices->NextDescIdx % Ring->QueueSize;
|