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OvmfPkg/IoMmuDxe: rewrap source code to 79 characters 

No functional changes.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
This commit is contained in:
Laszlo Ersek 2017-08-02 11:20:03 +02:00
parent 8dccfa6d48
commit 812568fb87
4 changed files with 130 additions and 70 deletions
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173
OvmfPkg/IoMmuDxe/AmdSevIoMmu.c
View File

@ -1,9 +1,9 @@
/** @file
The protocol provides support to allocate, free, map and umap a DMA buffer for
bus master (e.g PciHostBridge). When SEV is enabled, the DMA operations must
be performed on unencrypted buffer hence we use a bounce buffer to map the guest
buffer into an unencrypted DMA buffer.
The protocol provides support to allocate, free, map and umap a DMA buffer
for bus master (e.g PciHostBridge). When SEV is enabled, the DMA operations
must be performed on unencrypted buffer hence we use a bounce buffer to map
the guest buffer into an unencrypted DMA buffer.
Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
@ -31,29 +31,33 @@ typedef struct {
#define NO_MAPPING (VOID *) (UINTN) -1
/**
Provides the controller-specific addresses required to access system memory from a
DMA bus master. On SEV guest, the DMA operations must be performed on shared
buffer hence we allocate a bounce buffer to map the HostAddress to a DeviceAddress.
The Encryption attribute is removed from the DeviceAddress buffer.
Provides the controller-specific addresses required to access system memory
from a DMA bus master. On SEV guest, the DMA operations must be performed on
shared buffer hence we allocate a bounce buffer to map the HostAddress to a
DeviceAddress. The Encryption attribute is removed from the DeviceAddress
buffer.
@param This The protocol instance pointer.
@param Operation Indicates if the bus master is going to read or
write to system memory.
@param HostAddress The system memory address to map to the PCI controller.
@param HostAddress The system memory address to map to the PCI
controller.
@param NumberOfBytes On input the number of bytes to map. On output
the number of bytes
that were mapped.
@param DeviceAddress The resulting map address for the bus master PCI
controller to use to
access the hosts HostAddress.
the number of bytes that were mapped.
@param DeviceAddress The resulting map address for the bus master
PCI controller to use to access the hosts
HostAddress.
@param Mapping A resulting value to pass to Unmap().
@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
@retval EFI_SUCCESS The range was mapped for the returned
NumberOfBytes.
@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common
buffer.
@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack
of resources.
@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.
@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
lack of resources.
@retval EFI_DEVICE_ERROR The system hardware could not map the requested
address.
**/
EFI_STATUS
@ -105,8 +109,8 @@ IoMmuMap (
Operation == EdkiiIoMmuOperationBusMasterCommonBuffer64) {
//
// Common Buffer operations can not be remapped. If the common buffer
// if above 4GB, then it is not possible to generate a mapping, so return
// an error.
// if above 4GB, then it is not possible to generate a mapping, so
// return an error.
//
return EFI_UNSUPPORTED;
}
@ -161,7 +165,12 @@ IoMmuMap (
//
// Clear the memory encryption mask from the device buffer
//
Status = MemEncryptSevClearPageEncMask (0, MapInfo->DeviceAddress, MapInfo->NumberOfPages, TRUE);
Status = MemEncryptSevClearPageEncMask (
0,
MapInfo->DeviceAddress,
MapInfo->NumberOfPages,
TRUE
);
ASSERT_EFI_ERROR(Status);
//
@ -188,9 +197,15 @@ IoMmuMap (
//
*Mapping = MapInfo;
DEBUG ((DEBUG_VERBOSE, "%a Device 0x%Lx Host 0x%Lx Pages 0x%Lx Bytes 0x%Lx\n",
__FUNCTION__, MapInfo->DeviceAddress, MapInfo->HostAddress,
MapInfo->NumberOfPages, MapInfo->NumberOfBytes));
DEBUG ((
DEBUG_VERBOSE,
"%a Device 0x%Lx Host 0x%Lx Pages 0x%Lx Bytes 0x%Lx\n",
__FUNCTION__,
MapInfo->DeviceAddress,
MapInfo->HostAddress,
MapInfo->NumberOfPages,
MapInfo->NumberOfBytes
));
return EFI_SUCCESS;
}
@ -202,8 +217,10 @@ IoMmuMap (
@param Mapping The mapping value returned from Map().
@retval EFI_SUCCESS The range was unmapped.
@retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().
@retval EFI_DEVICE_ERROR The data was not committed to the target system memory.
@retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by
Map().
@retval EFI_DEVICE_ERROR The data was not committed to the target system
memory.
**/
EFI_STATUS
EFIAPI
@ -244,13 +261,24 @@ IoMmuUnmap (
);
}
DEBUG ((DEBUG_VERBOSE, "%a Device 0x%Lx Host 0x%Lx Pages 0x%Lx Bytes 0x%Lx\n",
__FUNCTION__, MapInfo->DeviceAddress, MapInfo->HostAddress,
MapInfo->NumberOfPages, MapInfo->NumberOfBytes));
DEBUG ((
DEBUG_VERBOSE,
"%a Device 0x%Lx Host 0x%Lx Pages 0x%Lx Bytes 0x%Lx\n",
__FUNCTION__,
MapInfo->DeviceAddress,
MapInfo->HostAddress,
MapInfo->NumberOfPages,
MapInfo->NumberOfBytes
));
//
// Restore the memory encryption mask
//
Status = MemEncryptSevSetPageEncMask (0, MapInfo->DeviceAddress, MapInfo->NumberOfPages, TRUE);
Status = MemEncryptSevSetPageEncMask (
0,
MapInfo->DeviceAddress,
MapInfo->NumberOfPages,
TRUE
);
ASSERT_EFI_ERROR(Status);
//
@ -267,16 +295,18 @@ IoMmuUnmap (
@param This The protocol instance pointer.
@param Type This parameter is not used and must be ignored.
@param MemoryType The type of memory to allocate, EfiBootServicesData
or EfiRuntimeServicesData.
@param MemoryType The type of memory to allocate,
EfiBootServicesData or EfiRuntimeServicesData.
@param Pages The number of pages to allocate.
@param HostAddress A pointer to store the base system memory address
of the allocated range.
@param Attributes The requested bit mask of attributes for the allocated range.
@param HostAddress A pointer to store the base system memory
address of the allocated range.
@param Attributes The requested bit mask of attributes for the
allocated range.
@retval EFI_SUCCESS The requested memory pages were allocated.
@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute
bits are MEMORY_WRITE_COMBINE and MEMORY_CACHED.
@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal
attribute bits are MEMORY_WRITE_COMBINE and
MEMORY_CACHED.
@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
@ -341,7 +371,13 @@ IoMmuAllocateBuffer (
ASSERT_EFI_ERROR(Status);
}
DEBUG ((DEBUG_VERBOSE, "%a Address 0x%Lx Pages 0x%Lx\n", __FUNCTION__, PhysicalAddress, Pages));
DEBUG ((
DEBUG_VERBOSE,
"%a Address 0x%Lx Pages 0x%Lx\n",
__FUNCTION__,
PhysicalAddress,
Pages
));
return Status;
}
@ -350,11 +386,12 @@ IoMmuAllocateBuffer (
@param This The protocol instance pointer.
@param Pages The number of pages to free.
@param HostAddress The base system memory address of the allocated range.
@param HostAddress The base system memory address of the allocated
range.
@retval EFI_SUCCESS The requested memory pages were freed.
@retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
was not allocated with AllocateBuffer().
@retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and
Pages was not allocated with AllocateBuffer().
**/
EFI_STATUS
@ -370,10 +407,21 @@ IoMmuFreeBuffer (
//
// Set memory encryption mask
//
Status = MemEncryptSevSetPageEncMask (0, (EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress, Pages, TRUE);
Status = MemEncryptSevSetPageEncMask (
0,
(EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress,
Pages,
TRUE
);
ASSERT_EFI_ERROR(Status);
DEBUG ((DEBUG_VERBOSE, "%a Address 0x%Lx Pages 0x%Lx\n", __FUNCTION__, (UINTN)HostAddress, Pages));
DEBUG ((
DEBUG_VERBOSE,
"%a Address 0x%Lx Pages 0x%Lx\n",
__FUNCTION__,
(UINTN)HostAddress,
Pages
));
return gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress, Pages);
}
@ -389,30 +437,41 @@ IoMmuFreeBuffer (
attribute to request DMA access (read and/or write).
The DeviceHandle is used to identify which device submits the request.
The IOMMU implementation need translate the device path to an IOMMU device ID,
and set IOMMU hardware register accordingly.
The IOMMU implementation need translate the device path to an IOMMU device
ID, and set IOMMU hardware register accordingly.
1) DeviceHandle can be a standard PCI device.
The memory for BusMasterRead need set EDKII_IOMMU_ACCESS_READ.
The memory for BusMasterWrite need set EDKII_IOMMU_ACCESS_WRITE.
The memory for BusMasterCommonBuffer need set EDKII_IOMMU_ACCESS_READ|EDKII_IOMMU_ACCESS_WRITE.
After the memory is used, the memory need set 0 to keep it being protected.
The memory for BusMasterCommonBuffer need set
EDKII_IOMMU_ACCESS_READ|EDKII_IOMMU_ACCESS_WRITE.
After the memory is used, the memory need set 0 to keep it being
protected.
2) DeviceHandle can be an ACPI device (ISA, I2C, SPI, etc).
The memory for DMA access need set EDKII_IOMMU_ACCESS_READ and/or EDKII_IOMMU_ACCESS_WRITE.
The memory for DMA access need set EDKII_IOMMU_ACCESS_READ and/or
EDKII_IOMMU_ACCESS_WRITE.
@param[in] This The protocol instance pointer.
@param[in] DeviceHandle The device who initiates the DMA access request.
@param[in] DeviceHandle The device who initiates the DMA access
request.
@param[in] Mapping The mapping value returned from Map().
@param[in] IoMmuAccess The IOMMU access.
@retval EFI_SUCCESS The IoMmuAccess is set for the memory range specified by DeviceAddress and Length.
@retval EFI_SUCCESS The IoMmuAccess is set for the memory range
specified by DeviceAddress and Length.
@retval EFI_INVALID_PARAMETER DeviceHandle is an invalid handle.
@retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by Map().
@retval EFI_INVALID_PARAMETER IoMmuAccess specified an illegal combination of access.
@retval EFI_INVALID_PARAMETER Mapping is not a value that was returned by
Map().
@retval EFI_INVALID_PARAMETER IoMmuAccess specified an illegal combination
of access.
@retval EFI_UNSUPPORTED DeviceHandle is unknown by the IOMMU.
@retval EFI_UNSUPPORTED The bit mask of IoMmuAccess is not supported by the IOMMU.
@retval EFI_UNSUPPORTED The IOMMU does not support the memory range specified by Mapping.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to modify the IOMMU access.
@retval EFI_DEVICE_ERROR The IOMMU device reported an error while attempting the operation.
@retval EFI_UNSUPPORTED The bit mask of IoMmuAccess is not supported
by the IOMMU.
@retval EFI_UNSUPPORTED The IOMMU does not support the memory range
specified by Mapping.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to
modify the IOMMU access.
@retval EFI_DEVICE_ERROR The IOMMU device reported an error while
attempting the operation.
**/
EFI_STATUS

8
OvmfPkg/IoMmuDxe/AmdSevIoMmu.h
View File

@ -1,9 +1,9 @@
/** @file
The protocol provides support to allocate, free, map and umap a DMA buffer for
bus master (e.g PciHostBridge). When SEV is enabled, the DMA operations must
be performed on unencrypted buffer hence protocol clear the encryption bit
from the DMA buffer.
The protocol provides support to allocate, free, map and umap a DMA buffer
for bus master (e.g PciHostBridge). When SEV is enabled, the DMA operations
must be performed on unencrypted buffer hence protocol clear the encryption
bit from the DMA buffer.
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2017, AMD Inc. All rights reserved.<BR>

8
OvmfPkg/IoMmuDxe/IoMmuDxe.c
View File

@ -5,10 +5,10 @@
Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD
License which accompanies this distribution. The full text of the license may
be found at http://opensource.org/licenses/bsd-license.php
This program and the accompanying materials are licensed and made available
under the terms and conditions of the BSD License which accompanies this
distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

11
OvmfPkg/IoMmuDxe/IoMmuDxe.inf
View File

@ -5,13 +5,14 @@
#
# Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD
# License which accompanies this distribution. The full text of the license may
# be found at http://opensource.org/licenses/bsd-license.php
# This program and the accompanying materials are licensed and made available
# under the terms and conditions of the BSD License which accompanies this
# distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
# IMPLIED.
#
#**/