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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>
152 lines
7.1 KiB
C++
152 lines
7.1 KiB
C++
/** @file
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Copyright (c) 2019, 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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#include <Protocol/DevicePath.h>
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#include <Protocol/NvmExpressPassthru.h>
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///
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/// Global ID for the EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI.
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///
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#define EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI_GUID \
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{ \
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0x6af31b2c, 0x3be, 0x46c1, { 0xb1, 0x2d, 0xea, 0x4a, 0x36, 0xdf, 0xa7, 0x4c } \
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}
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//
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// Forward declaration for the EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI.
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//
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typedef struct _EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI;
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//
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// Revision The revision to which the Nvme Pass Thru PPI interface adheres.
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// All future revisions must be backwards compatible.
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// If a future version is not back wards compatible it is not the same GUID.
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//
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#define EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI_REVISION 0x00010000
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/**
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Gets the device path information of the underlying NVM Express host controller.
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@param[in] This The PPI instance pointer.
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@param[out] DevicePathLength The length of the device path in bytes specified
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by DevicePath.
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@param[out] DevicePath The device path of the underlying NVM Express
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host controller.
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This field re-uses EFI Device Path Protocol as
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defined by Section 10.2 EFI Device Path Protocol
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of UEFI 2.7 Specification.
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@retval EFI_SUCCESS The operation succeeds.
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@retval EFI_INVALID_PARAMETER DevicePathLength or DevicePath is NULL.
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@retval EFI_OUT_OF_RESOURCES The operation fails due to lack of resources.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_PEI_NVME_PASS_THRU_GET_DEVICE_PATH)(
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IN EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI *This,
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OUT UINTN *DevicePathLength,
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OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
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);
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/**
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Used to retrieve the next namespace ID for this NVM Express controller.
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If on input the value pointed to by NamespaceId is 0xFFFFFFFF, then the first
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valid namespace ID defined on the NVM Express controller is returned in the
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location pointed to by NamespaceId and a status of EFI_SUCCESS is returned.
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If on input the value pointed to by NamespaceId is an invalid namespace ID
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other than 0xFFFFFFFF, then EFI_INVALID_PARAMETER is returned.
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If on input the value pointed to by NamespaceId is a valid namespace ID, then
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the next valid namespace ID on the NVM Express controller is returned in the
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location pointed to by NamespaceId, and EFI_SUCCESS is returned.
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If the value pointed to by NamespaceId is the namespace ID of the last
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namespace on the NVM Express controller, then EFI_NOT_FOUND is returned.
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@param[in] This The PPI instance pointer.
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@param[in,out] NamespaceId On input, a pointer to a legal NamespaceId
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for an NVM Express namespace present on the
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NVM Express controller. On output, a pointer
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to the next NamespaceId of an NVM Express
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namespace on an NVM Express controller. An
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input value of 0xFFFFFFFF retrieves the
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first NamespaceId for an NVM Express
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namespace present on an NVM Express
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controller.
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@retval EFI_SUCCESS The Namespace ID of the next Namespace was
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returned.
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@retval EFI_NOT_FOUND There are no more namespaces defined on this
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controller.
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@retval EFI_INVALID_PARAMETER NamespaceId is an invalid value other than
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0xFFFFFFFF.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_PEI_NVME_PASS_THRU_GET_NEXT_NAMESPACE)(
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IN EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI *This,
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IN OUT UINT32 *NamespaceId
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);
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/**
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Sends an NVM Express Command Packet to an NVM Express controller or namespace. This function only
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supports blocking execution of the command.
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@param[in] This The PPI instance pointer.
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@param[in] NamespaceId Is a 32 bit Namespace ID to which the Nvm Express command packet will
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be sent.
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A Value of 0 denotes the NVM Express controller, a Value of all 0FFh in
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the namespace ID specifies that the command packet should be sent to all
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valid namespaces.
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@param[in,out] Packet A pointer to the EDKII PEI NVM Express PassThru Command Packet to send
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to the NVMe namespace specified by NamespaceId.
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@retval EFI_SUCCESS The EDKII PEI NVM Express Command Packet was sent by the host.
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TransferLength bytes were transferred to, or from DataBuffer.
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@retval EFI_NOT_READY The EDKII PEI NVM Express Command Packet could not be sent because
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the controller is not ready. The caller may retry again later.
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@retval EFI_DEVICE_ERROR A device error occurred while attempting to send the EDKII PEI NVM
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Express Command Packet.
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@retval EFI_INVALID_PARAMETER Namespace, or the contents of EDKII_PEI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET
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are invalid.
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The EDKII PEI NVM Express Command Packet was not sent, so no
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additional status information is available.
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@retval EFI_UNSUPPORTED The command described by the EDKII PEI NVM Express Command Packet
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is not supported by the host adapter.
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The EDKII PEI NVM Express Command Packet was not sent, so no
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additional status information is available.
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@retval EFI_TIMEOUT A timeout occurred while waiting for the EDKII PEI NVM Express Command
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Packet to execute.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_PEI_NVME_PASS_THRU_PASSTHRU)(
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IN EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI *This,
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IN UINT32 NamespaceId,
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IN OUT EFI_NVM_EXPRESS_PASS_THRU_COMMAND_PACKET *Packet
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);
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//
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// This PPI contains a set of services to send commands
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// to a mass storage device.
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//
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struct _EDKII_PEI_NVM_EXPRESS_PASS_THRU_PPI {
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UINT64 Revision;
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EFI_NVM_EXPRESS_PASS_THRU_MODE *Mode;
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EDKII_PEI_NVME_PASS_THRU_GET_DEVICE_PATH GetDevicePath;
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EDKII_PEI_NVME_PASS_THRU_GET_NEXT_NAMESPACE GetNextNameSpace;
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EDKII_PEI_NVME_PASS_THRU_PASSTHRU PassThru;
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};
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extern EFI_GUID gEdkiiPeiNvmExpressPassThruPpiGuid;
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