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https://github.com/Dasharo/edk2-upstream.git
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Michael Kubackiandmergify[bot]
7a934d0bef
Replace traditional `#ifndef`/`#define`/`#endif` include guards with
`#pragma` once.
`#pragma once` is a widely supported preprocessor directive that
prevents header files from being included multiple times. It is
supported by all toolchains used to build edk2: GCC, Clang/LLVM, and
MSVC.
Compared to macro-based include guards, `#pragma once`:
- Eliminates the risk of macro name collisions or copy/paste errors
where two headers inadvertently use the same guard macro.
- Eliminate inconsistency in the way include guard macros are named
(e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.).
- Reduces boilerplate (three lines replaced by one).
- Avoids polluting the macro namespace with guard symbols.
- Can improve build times as the preprocessor can skip re-opening the
file entirely, rather than re-reading it to find the matching
`#endif` ("multiple-include optimization").
- Note that some compilers may already optimize traditional include
guards, by recognzining the idiomatic pattern.
This change is made acknowledging that overall portability of the
code will technically be reduced, as `#pragma once` is not part of the
C/C++ standards.
However, this is considered acceptable given:
1. edk2 already defines a subset of supported compilers in
BaseTools/Conf/tools_def.template, all of which have supported
`#pragma once` for over two decades.
2. There have been concerns raised to the project about inconsistent
include guard naming and potential macro collisions.
Approximate compiler support dates:
- MSVC: Supported since Visual C++ 4.2 (1996)
- GCC: Supported since 3.4 (2004)
(http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html)
- Clang (LLVM based): Since initial release in 2007
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
233 lines
9.0 KiB
C
233 lines
9.0 KiB
C
/** @file
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EDKII Universal Flash Storage Host Controller Protocol.
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Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#pragma once
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//
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// UFS Host Controller Protocol GUID value
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//
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#define EDKII_UFS_HOST_CONTROLLER_PROTOCOL_GUID \
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{ \
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0xebc01af5, 0x7a9, 0x489e, { 0xb7, 0xce, 0xdc, 0x8, 0x9e, 0x45, 0x9b, 0x2f } \
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}
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//
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// Forward reference for pure ANSI compatability
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//
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typedef struct _EDKII_UFS_HOST_CONTROLLER_PROTOCOL EDKII_UFS_HOST_CONTROLLER_PROTOCOL;
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/**
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Get the MMIO base address of UFS host controller.
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@param This The protocol instance pointer.
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@param MmioBar Pointer to the UFS host controller MMIO base address.
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@retval EFI_SUCCESS The operation succeeds.
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@retval EFI_INVALID_PARAMETER The parameters are invalid.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_UFS_HC_GET_MMIO_BAR)(
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IN EDKII_UFS_HOST_CONTROLLER_PROTOCOL *This,
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OUT UINTN *MmioBar
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);
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///
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/// *******************************************************
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/// EFI_UFS_HOST_CONTROLLER_OPERATION
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/// *******************************************************
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///
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typedef enum {
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///
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/// A read operation from system memory by a bus master.
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///
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EdkiiUfsHcOperationBusMasterRead,
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///
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/// A write operation from system memory by a bus master.
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///
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EdkiiUfsHcOperationBusMasterWrite,
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///
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/// Provides both read and write access to system memory by both the processor and a
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/// bus master. The buffer is coherent from both the processor's and the bus master's point of view.
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///
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EdkiiUfsHcOperationBusMasterCommonBuffer,
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EdkiiUfsHcOperationMaximum
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} EDKII_UFS_HOST_CONTROLLER_OPERATION;
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/**
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Provides the UFS controller-specific addresses needed to access system memory.
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@param This A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.
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@param Operation Indicates if the bus master is going to read or write to system memory.
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@param HostAddress The system memory address to map to the UFS controller.
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@param NumberOfBytes On input the number of bytes to map. On output the number of bytes
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that were mapped.
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@param DeviceAddress The resulting map address for the bus master UFS controller to use to
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access the hosts HostAddress.
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@param Mapping A resulting value to pass to Unmap().
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@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
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@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_UFS_HC_MAP)(
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IN EDKII_UFS_HOST_CONTROLLER_PROTOCOL *This,
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IN EDKII_UFS_HOST_CONTROLLER_OPERATION Operation,
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IN VOID *HostAddress,
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IN OUT UINTN *NumberOfBytes,
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OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
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OUT VOID **Mapping
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);
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/**
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Completes the Map() operation and releases any corresponding resources.
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@param This A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.
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@param Mapping The mapping value returned from Map().
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@retval EFI_SUCCESS The range was unmapped.
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@retval EFI_DEVICE_ERROR The data was not committed to the target system memory.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_UFS_HC_UNMAP)(
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IN EDKII_UFS_HOST_CONTROLLER_PROTOCOL *This,
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IN VOID *Mapping
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);
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/**
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Allocates pages that are suitable for an EfiUfsHcOperationBusMasterCommonBuffer
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mapping.
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@param This A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.
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@param Type This parameter is not used and must be ignored.
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@param MemoryType The type of memory to allocate, EfiBootServicesData or
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EfiRuntimeServicesData.
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@param Pages The number of pages to allocate.
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@param HostAddress A pointer to store the base system memory address of the
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allocated range.
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@param Attributes The requested bit mask of attributes for the allocated range.
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@retval EFI_SUCCESS The requested memory pages were allocated.
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@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
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MEMORY_WRITE_COMBINE and MEMORY_CACHED.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_UFS_HC_ALLOCATE_BUFFER)(
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IN EDKII_UFS_HOST_CONTROLLER_PROTOCOL *This,
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IN EFI_ALLOCATE_TYPE Type,
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IN EFI_MEMORY_TYPE MemoryType,
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IN UINTN Pages,
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OUT VOID **HostAddress,
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IN UINT64 Attributes
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);
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/**
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Frees memory that was allocated with AllocateBuffer().
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@param This A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.
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@param Pages The number of pages to free.
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@param HostAddress The base system memory address of the allocated range.
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@retval EFI_SUCCESS The requested memory pages were freed.
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@retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages
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was not allocated with AllocateBuffer().
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_UFS_HC_FREE_BUFFER)(
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IN EDKII_UFS_HOST_CONTROLLER_PROTOCOL *This,
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IN UINTN Pages,
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IN VOID *HostAddress
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);
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/**
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Flushes all posted write transactions from the UFS bus to attached UFS device.
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@param This A pointer to the EFI_UFS_HOST_CONTROLLER_PROTOCOL instance.
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@retval EFI_SUCCESS The posted write transactions were flushed from the UFS bus
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to attached UFS device.
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@retval EFI_DEVICE_ERROR The posted write transactions were not flushed from the UFS
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bus to attached UFS device due to a hardware error.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_UFS_HC_FLUSH)(
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IN EDKII_UFS_HOST_CONTROLLER_PROTOCOL *This
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);
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typedef enum {
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EfiUfsHcWidthUint8 = 0,
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EfiUfsHcWidthUint16,
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EfiUfsHcWidthUint32,
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EfiUfsHcWidthUint64,
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EfiUfsHcWidthMaximum
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} EDKII_UFS_HOST_CONTROLLER_PROTOCOL_WIDTH;
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/**
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Enable a UFS bus driver to access UFS MMIO registers in the UFS Host Controller memory space.
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@param This A pointer to the EDKII_UFS_HOST_CONTROLLER_PROTOCOL instance.
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@param Width Signifies the width of the memory operations.
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@param Offset The offset within the UFS Host Controller MMIO space to start the
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memory operation.
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@param Count The number of memory operations to perform.
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@param Buffer For read operations, the destination buffer to store the results.
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For write operations, the source buffer to write data from.
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@retval EFI_SUCCESS The data was read from or written to the UFS host controller.
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@retval EFI_UNSUPPORTED The address range specified by Offset, Width, and Count is not
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valid for the UFS Host Controller memory space.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_UFS_HC_MMIO_READ_WRITE)(
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IN EDKII_UFS_HOST_CONTROLLER_PROTOCOL *This,
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IN EDKII_UFS_HOST_CONTROLLER_PROTOCOL_WIDTH Width,
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IN UINT64 Offset,
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IN UINTN Count,
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IN OUT VOID *Buffer
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);
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///
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/// UFS Host Controller Protocol structure.
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///
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struct _EDKII_UFS_HOST_CONTROLLER_PROTOCOL {
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EDKII_UFS_HC_GET_MMIO_BAR GetUfsHcMmioBar;
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EDKII_UFS_HC_ALLOCATE_BUFFER AllocateBuffer;
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EDKII_UFS_HC_FREE_BUFFER FreeBuffer;
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EDKII_UFS_HC_MAP Map;
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EDKII_UFS_HC_UNMAP Unmap;
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EDKII_UFS_HC_FLUSH Flush;
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EDKII_UFS_HC_MMIO_READ_WRITE Read;
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EDKII_UFS_HC_MMIO_READ_WRITE Write;
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};
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///
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/// UFS Host Controller Protocol GUID variable.
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///
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extern EFI_GUID gEdkiiUfsHostControllerProtocolGuid;
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