diff options
Diffstat (limited to 'MdeModulePkg/Include/Protocol')
| -rw-r--r-- | MdeModulePkg/Include/Protocol/IoMmu.h | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/MdeModulePkg/Include/Protocol/IoMmu.h b/MdeModulePkg/Include/Protocol/IoMmu.h new file mode 100644 index 0000000..9d25c17 --- /dev/null +++ b/MdeModulePkg/Include/Protocol/IoMmu.h @@ -0,0 +1,259 @@ +/** @file
+ EFI IOMMU Protocol.
+
+Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that 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.
+
+**/
+
+
+#ifndef __IOMMU_H__
+#define __IOMMU_H__
+
+//
+// IOMMU Protocol GUID value
+//
+#define EDKII_IOMMU_PROTOCOL_GUID \
+ { \
+ 0x4e939de9, 0xd948, 0x4b0f, { 0x88, 0xed, 0xe6, 0xe1, 0xce, 0x51, 0x7c, 0x1e } \
+ }
+
+//
+// Forward reference for pure ANSI compatability
+//
+typedef struct _EDKII_IOMMU_PROTOCOL EDKII_IOMMU_PROTOCOL;
+
+//
+// Revision The revision to which the IOMMU interface adheres.
+// All future revisions must be backwards compatible.
+// If a future version is not back wards compatible it is not the same GUID.
+//
+#define EDKII_IOMMU_PROTOCOL_REVISION 0x00010000
+
+//
+// IOMMU Access for SetAttribute
+//
+// These types can be "ORed" together as needed.
+// Any undefined bits are reserved and must be zero.
+//
+#define EDKII_IOMMU_ACCESS_READ 0x1
+#define EDKII_IOMMU_ACCESS_WRITE 0x2
+
+//
+// IOMMU Operation for Map
+//
+typedef enum {
+ ///
+ /// A read operation from system memory by a bus master that is not capable of producing
+ /// PCI dual address cycles.
+ ///
+ EdkiiIoMmuOperationBusMasterRead,
+ ///
+ /// A write operation from system memory by a bus master that is not capable of producing
+ /// PCI dual address cycles.
+ ///
+ EdkiiIoMmuOperationBusMasterWrite,
+ ///
+ /// Provides both read and write access to system memory by both the processor and a bus
+ /// master that is not capable of producing PCI dual address cycles.
+ ///
+ EdkiiIoMmuOperationBusMasterCommonBuffer,
+ ///
+ /// A read operation from system memory by a bus master that is capable of producing PCI
+ /// dual address cycles.
+ ///
+ EdkiiIoMmuOperationBusMasterRead64,
+ ///
+ /// A write operation to system memory by a bus master that is capable of producing PCI
+ /// dual address cycles.
+ ///
+ EdkiiIoMmuOperationBusMasterWrite64,
+ ///
+ /// Provides both read and write access to system memory by both the processor and a bus
+ /// master that is capable of producing PCI dual address cycles.
+ ///
+ EdkiiIoMmuOperationBusMasterCommonBuffer64,
+ EdkiiIoMmuOperationMaximum
+} EDKII_IOMMU_OPERATION;
+
+//
+// IOMMU attribute for AllocateBuffer
+// Any undefined bits are reserved and must be zero.
+//
+#define EDKII_IOMMU_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
+#define EDKII_IOMMU_ATTRIBUTE_MEMORY_CACHED 0x0800
+#define EDKII_IOMMU_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
+
+#define EDKII_IOMMU_ATTRIBUTE_VALID_FOR_ALLOCATE_BUFFER (EDKII_IOMMU_ATTRIBUTE_MEMORY_WRITE_COMBINE | EDKII_IOMMU_ATTRIBUTE_MEMORY_CACHED | EDKII_IOMMU_ATTRIBUTE_DUAL_ADDRESS_CYCLE)
+
+#define EDKII_IOMMU_ATTRIBUTE_INVALID_FOR_ALLOCATE_BUFFER (~EDKII_IOMMU_ATTRIBUTE_VALID_FOR_ALLOCATE_BUFFER)
+
+/**
+ Set IOMMU attribute for a system memory.
+
+ If the IOMMU protocol exists, the system memory cannot be used
+ for DMA by default.
+
+ When a device requests a DMA access for a system memory,
+ the device driver need use SetAttribute() to update the IOMMU
+ 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.
+ 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.
+ 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.
+
+ @param[in] This The protocol instance pointer.
+ @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_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_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.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EDKII_IOMMU_SET_ATTRIBUTE)(
+ IN EDKII_IOMMU_PROTOCOL *This,
+ IN EFI_HANDLE DeviceHandle,
+ IN VOID *Mapping,
+ IN UINT64 IoMmuAccess
+ );
+
+/**
+ Provides the controller-specific addresses required to access system memory from a
+ DMA bus master.
+
+ @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 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.
+ @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_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.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EDKII_IOMMU_MAP)(
+ IN EDKII_IOMMU_PROTOCOL *This,
+ IN EDKII_IOMMU_OPERATION Operation,
+ IN VOID *HostAddress,
+ IN OUT UINTN *NumberOfBytes,
+ OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
+ OUT VOID **Mapping
+ );
+
+/**
+ Completes the Map() operation and releases any corresponding resources.
+
+ @param This The protocol instance pointer.
+ @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.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EDKII_IOMMU_UNMAP)(
+ IN EDKII_IOMMU_PROTOCOL *This,
+ IN VOID *Mapping
+ );
+
+/**
+ Allocates pages that are suitable for an OperationBusMasterCommonBuffer or
+ OperationBusMasterCommonBuffer64 mapping.
+
+ @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 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.
+
+ @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_INVALID_PARAMETER One or more parameters are invalid.
+ @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EDKII_IOMMU_ALLOCATE_BUFFER)(
+ IN EDKII_IOMMU_PROTOCOL *This,
+ IN EFI_ALLOCATE_TYPE Type,
+ IN EFI_MEMORY_TYPE MemoryType,
+ IN UINTN Pages,
+ IN OUT VOID **HostAddress,
+ IN UINT64 Attributes
+ );
+
+/**
+ Frees memory that was allocated with AllocateBuffer().
+
+ @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.
+
+ @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().
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EDKII_IOMMU_FREE_BUFFER)(
+ IN EDKII_IOMMU_PROTOCOL *This,
+ IN UINTN Pages,
+ IN VOID *HostAddress
+ );
+
+///
+/// IOMMU Protocol structure.
+///
+struct _EDKII_IOMMU_PROTOCOL {
+ UINT64 Revision;
+ EDKII_IOMMU_SET_ATTRIBUTE SetAttribute;
+ EDKII_IOMMU_MAP Map;
+ EDKII_IOMMU_UNMAP Unmap;
+ EDKII_IOMMU_ALLOCATE_BUFFER AllocateBuffer;
+ EDKII_IOMMU_FREE_BUFFER FreeBuffer;
+};
+
+///
+/// IOMMU Protocol GUID variable.
+///
+extern EFI_GUID gEdkiiIoMmuProtocolGuid;
+
+#endif
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