mirror of
https://github.com/NVIDIA/open-gpu-kernel-modules.git
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95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
/*
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* SPDX-FileCopyrightText: Copyright (c) 1993-2021 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/******************************* DisplayPort********************************\
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* *
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* Module: dp_messageheader.h *
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* DP message header parser *
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* *
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\***************************************************************************/
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#ifndef INCLUDED_DP_MESSAGEHEADER_H
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#define INCLUDED_DP_MESSAGEHEADER_H
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#include "dp_internal.h"
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#include "dp_list.h"
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#include "dp_auxretry.h"
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#include "dp_timer.h"
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#include "dp_bitstream.h"
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#include "dp_address.h"
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namespace DisplayPort
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{
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//
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// User filled message structure
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//
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#define MAX_MESSAGE_SIZE 64
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struct EncodedMessage : public Object
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{
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unsigned messageNumber; // 0 or 1
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Address address; // target device for message (source for reply)
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Buffer buffer;
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bool isBroadcast;
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bool isPathMessage;
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EncodedMessage()
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: messageNumber(0), isBroadcast(false), isPathMessage(false)
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{}
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void swap(EncodedMessage & other)
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{
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swap_args(messageNumber, other.messageNumber);
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swap_args(address, other.address);
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swap_args(isBroadcast, other.isBroadcast);
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swap_args(isPathMessage, other.isPathMessage);
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buffer.swap(other.buffer);
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}
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};
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//
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// Decoded message header
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//
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struct MessageHeader
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{
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Address address;
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unsigned messageNumber;
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unsigned payloadBytes;
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bool isBroadcast;
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bool isPathMessage;
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bool isTransactionStart;
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bool isTransactionEnd;
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unsigned headerSizeBits;
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};
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bool decodeHeader(BitStreamReader * reader, MessageHeader * header, const Address & address);
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//
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// Routines for maintaining a list of partially complete messages
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//
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// after 4 secs delete dead transactions
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#define DP_INCOMPLETE_MESSAGE_TIMEOUT_USEC 4000000
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}
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#endif //INCLUDED_DP_MESSAGEHEADER_H
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