mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-27 12:15:19 +01:00
254 lines
10 KiB
C
254 lines
10 KiB
C
/** @file
|
|
EFI IOMMU Protocol.
|
|
|
|
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
|
|
#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, MEMORY_CACHED and DUAL_ADDRESS_CYCLE.
|
|
@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
|