| 1 | /* $Id: HDAStream.h 70594 2018-01-15 16:35:07Z vboxsync $ */
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| 2 | /** @file
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| 3 | * HDAStream.h - Stream functions for HD Audio.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2017 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef HDA_STREAM_H
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| 19 | #define HDA_STREAM_H
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| 20 |
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| 21 | #include "DevHDACommon.h"
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| 22 |
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| 23 | #include "HDAStreamMap.h"
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| 24 | #include "HDAStreamPeriod.h"
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| 25 |
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| 26 | /*********************************************************************************************************************************
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| 27 | * Prototypes *
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| 28 | *********************************************************************************************************************************/
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| 29 |
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| 30 | typedef struct HDAMIXERSINK *PHDAMIXERSINK;
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| 31 |
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| 32 | #ifdef VBOX_WITH_AUDIO_HDA_ASYNC_IO
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| 33 | /**
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| 34 | * Structure keeping the HDA stream's state for asynchronous I/O.
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| 35 | */
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| 36 | typedef struct HDASTREAMSTATEAIO
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| 37 | {
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| 38 | /** Thread handle for the actual I/O thread. */
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| 39 | RTTHREAD Thread;
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| 40 | /** Event for letting the thread know there is some data to process. */
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| 41 | RTSEMEVENT Event;
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| 42 | /** Critical section for synchronizing access. */
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| 43 | RTCRITSECT CritSect;
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| 44 | /** Started indicator. */
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| 45 | volatile bool fStarted;
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| 46 | /** Shutdown indicator. */
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| 47 | volatile bool fShutdown;
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| 48 | /** Whether the thread should do any data processing or not. */
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| 49 | volatile bool fEnabled;
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| 50 | uint32_t Padding1;
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| 51 | } HDASTREAMSTATEAIO, *PHDASTREAMSTATEAIO;
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| 52 | #endif
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| 53 |
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| 54 | /**
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| 55 | * Structure containing HDA stream debug stuff, configurable at runtime.
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| 56 | */
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| 57 | typedef struct HDASTREAMDBGINFORT
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| 58 | {
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| 59 | /** Whether debugging is enabled or not. */
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| 60 | bool fEnabled;
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| 61 | uint8_t Padding[7];
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| 62 | /** File for dumping stream reads / writes.
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| 63 | * For input streams, this dumps data being written to the device FIFO,
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| 64 | * whereas for output streams this dumps data being read from the device FIFO. */
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| 65 | R3PTRTYPE(PPDMAUDIOFILE) pFileStream;
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| 66 | /** File for dumping DMA reads / writes.
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| 67 | * For input streams, this dumps data being written to the device DMA,
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| 68 | * whereas for output streams this dumps data being read from the device DMA. */
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| 69 | R3PTRTYPE(PPDMAUDIOFILE) pFileDMA;
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| 70 | } HDASTREAMDBGINFORT, *PHDASTREAMDBGINFORT;
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| 71 |
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| 72 | /**
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| 73 | * Structure containing HDA stream debug information.
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| 74 | */
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| 75 | typedef struct HDASTREAMDBGINFO
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| 76 | {
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| 77 | #ifdef DEBUG
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| 78 | /** Critical section to serialize access if needed. */
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| 79 | RTCRITSECT CritSect;
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| 80 | uint32_t Padding0[2];
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| 81 | /** Number of total read accesses. */
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| 82 | uint64_t cReadsTotal;
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| 83 | /** Number of total DMA bytes read. */
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| 84 | uint64_t cbReadTotal;
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| 85 | /** Timestamp (in ns) of last read access. */
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| 86 | uint64_t tsLastReadNs;
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| 87 | /** Number of total write accesses. */
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| 88 | uint64_t cWritesTotal;
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| 89 | /** Number of total DMA bytes written. */
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| 90 | uint64_t cbWrittenTotal;
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| 91 | /** Number of total write accesses since last iteration (Hz). */
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| 92 | uint64_t cWritesHz;
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| 93 | /** Number of total DMA bytes written since last iteration (Hz). */
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| 94 | uint64_t cbWrittenHz;
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| 95 | /** Timestamp (in ns) of beginning a new write slot. */
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| 96 | uint64_t tsWriteSlotBegin;
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| 97 | /** Number of current silence samples in a (consecutive) row. */
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| 98 | uint64_t csSilence;
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| 99 | /** Number of silent samples in a row to consider an audio block as audio gap (silence). */
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| 100 | uint64_t cSilenceThreshold;
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| 101 | /** How many bytes to skip in an audio stream before detecting silence.
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| 102 | * (useful for intros and silence at the beginning of a song). */
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| 103 | uint64_t cbSilenceReadMin;
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| 104 | #endif
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| 105 | /** Runtime debug info. */
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| 106 | HDASTREAMDBGINFORT Runtime;
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| 107 | } HDASTREAMDBGINFO ,*PHDASTREAMDBGINFO;
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| 108 |
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| 109 | /**
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| 110 | * Internal state of a HDA stream.
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| 111 | */
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| 112 | typedef struct HDASTREAMSTATE
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| 113 | {
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| 114 | /** Current BDLE to use. Wraps around to 0 if
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| 115 | * maximum (cBDLE) is reached. */
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| 116 | uint16_t uCurBDLE;
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| 117 | /** Flag indicating whether this stream currently is
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| 118 | * in reset mode and therefore not acccessible by the guest. */
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| 119 | volatile bool fInReset;
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| 120 | /** Flag indicating if the stream is in running state or not. */
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| 121 | volatile bool fRunning;
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| 122 | /** Unused, padding. */
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| 123 | uint8_t Padding0[3];
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| 124 | /** Critical section to serialize access. */
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| 125 | RTCRITSECT CritSect;
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| 126 | #ifdef VBOX_WITH_AUDIO_HDA_ASYNC_IO
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| 127 | /** Asynchronous I/O state members. */
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| 128 | HDASTREAMSTATEAIO AIO;
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| 129 | #endif
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| 130 | /** This stream's data mapping. */
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| 131 | HDASTREAMMAPPING Mapping;
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| 132 | /** Current BDLE (Buffer Descriptor List Entry). */
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| 133 | HDABDLE BDLE;
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| 134 | /** Circular buffer (FIFO) for holding DMA'ed data. */
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| 135 | R3PTRTYPE(PRTCIRCBUF) pCircBuf;
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| 136 | /** Timestamp of the last DMA data transfer. */
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| 137 | uint64_t tsTransferLast;
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| 138 | /** Timestamp of the next DMA data transfer.
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| 139 | * Next for determining the next scheduling window.
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| 140 | * Can be 0 if no next transfer is scheduled. */
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| 141 | uint64_t tsTransferNext;
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| 142 | /** Total transfer size (in bytes) of a transfer period. */
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| 143 | uint32_t cbTransferSize;
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| 144 | /** Transfer chunk size (in bytes) of a transfer period. */
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| 145 | uint32_t cbTransferChunk;
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| 146 | /** How many bytes already have been processed in within
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| 147 | * the current transfer period. */
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| 148 | uint32_t cbTransferProcessed;
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| 149 | /** How many interrupts are pending due to
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| 150 | * BDLE interrupt-on-completion (IOC) bits set. */
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| 151 | uint8_t cTransferPendingInterrupts;
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| 152 | /** The stream's current audio frame size (in bytes). */
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| 153 | uint32_t cbFrameSize;
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| 154 | /** How many audio data frames are left to be processed
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| 155 | * for the position adjustment handling.
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| 156 | *
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| 157 | * 0 if position adjustment handling is done or inactive. */
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| 158 | uint16_t cPosAdjustFramesLeft;
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| 159 | uint8_t Padding2[2];
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| 160 | /** (Virtual) clock ticks per byte. */
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| 161 | uint64_t cTicksPerByte;
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| 162 | /** (Virtual) clock ticks per transfer. */
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| 163 | uint64_t cTransferTicks;
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| 164 | /** The stream's period. Need for timing. */
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| 165 | HDASTREAMPERIOD Period;
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| 166 | /** The stream's current configuration.
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| 167 | * Should match SDFMT. */
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| 168 | PDMAUDIOSTREAMCFG Cfg;
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| 169 | #ifdef HDA_USE_DMA_ACCESS_HANDLER
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| 170 | /** List of DMA handlers. */
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| 171 | RTLISTANCHORR3 lstDMAHandlers;
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| 172 | #endif
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| 173 | /** How much DMA data from a previous transfer is left to be processed (in bytes).
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| 174 | * This can happen if the stream's frame size is bigger (e.g. 16 bytes) than
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| 175 | * the current DMA FIFO can hold (e.g. 10 bytes). Mostly needed for more complex
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| 176 | * stuff like interleaved surround streams. */
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| 177 | uint16_t cbDMALeft;
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| 178 | /** Unused, padding. */
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| 179 | uint8_t Padding3;
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| 180 | } HDASTREAMSTATE, *PHDASTREAMSTATE;
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| 181 |
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| 182 | /**
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| 183 | * Structure for keeping a HDA stream (SDI / SDO).
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| 184 | *
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| 185 | * Note: This HDA stream has nothing to do with a regular audio stream handled
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| 186 | * by the audio connector or the audio mixer. This HDA stream is a serial data in/out
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| 187 | * stream (SDI/SDO) defined in hardware and can contain multiple audio streams
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| 188 | * in one single SDI/SDO (interleaving streams).
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| 189 | *
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| 190 | * How a specific SDI/SDO is mapped to our internal audio streams relies on the
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| 191 | * stream channel mappings.
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| 192 | *
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| 193 | * Contains only register values which do *not* change until a
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| 194 | * stream reset occurs.
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| 195 | */
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| 196 | typedef struct HDASTREAM
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| 197 | {
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| 198 | /** Stream descriptor number (SDn). */
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| 199 | uint8_t u8SD;
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| 200 | /** Current channel index.
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| 201 | * For a stereo stream, this is u8Channel + 1. */
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| 202 | uint8_t u8Channel;
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| 203 | uint8_t Padding0[6];
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| 204 | /** DMA base address (SDnBDPU - SDnBDPL). */
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| 205 | uint64_t u64BDLBase;
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| 206 | /** Cyclic Buffer Length (SDnCBL).
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| 207 | * Represents the size of the ring buffer. */
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| 208 | uint32_t u32CBL;
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| 209 | /** Format (SDnFMT). */
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| 210 | uint16_t u16FMT;
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| 211 | /** FIFO Size (FIFOS).
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| 212 | * Maximum number of bytes that may have been DMA'd into
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| 213 | * memory but not yet transmitted on the link. */
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| 214 | uint16_t u16FIFOS;
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| 215 | /** FIFO Watermark. */
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| 216 | uint16_t u16FIFOW;
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| 217 | /** Last Valid Index (SDnLVI). */
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| 218 | uint16_t u16LVI;
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| 219 | uint16_t Padding1[2];
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| 220 | /** Pointer to the HDA state this stream is attached to. */
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| 221 | R3PTRTYPE(PHDASTATE) pHDAState;
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| 222 | /** Pointer to HDA sink this stream is attached to. */
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| 223 | R3PTRTYPE(PHDAMIXERSINK) pMixSink;
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| 224 | /** Internal state of this stream. */
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| 225 | HDASTREAMSTATE State;
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| 226 | /** Debug information. */
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| 227 | HDASTREAMDBGINFO Dbg;
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| 228 | } HDASTREAM, *PHDASTREAM;
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| 229 |
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| 230 | #ifdef VBOX_WITH_AUDIO_HDA_ASYNC_IO
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| 231 | /**
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| 232 | * Structure for keeping a HDA stream thread context.
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| 233 | */
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| 234 | typedef struct HDASTREAMTHREADCTX
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| 235 | {
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| 236 | PHDASTATE pThis;
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| 237 | PHDASTREAM pStream;
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| 238 | } HDASTREAMTHREADCTX, *PHDASTREAMTHREADCTX;
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| 239 | #endif
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| 240 |
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| 241 | #ifdef IN_RING3
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| 242 |
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| 243 | /** @name Stream functions.
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| 244 | * @{
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| 245 | */
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| 246 | int hdaStreamCreate(PHDASTREAM pStream, PHDASTATE pThis, uint8_t u8SD);
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| 247 | void hdaStreamDestroy(PHDASTREAM pStream);
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| 248 | int hdaStreamInit(PHDASTREAM pStream, uint8_t uSD);
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| 249 | void hdaStreamReset(PHDASTATE pThis, PHDASTREAM pStream, uint8_t uSD);
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| 250 | int hdaStreamEnable(PHDASTREAM pStream, bool fEnable);
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| 251 | uint32_t hdaStreamGetPosition(PHDASTATE pThis, PHDASTREAM pStream);
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| 252 | void hdaStreamSetPosition(PHDASTREAM pStream, uint32_t u32LPIB);
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| 253 | uint32_t hdaStreamGetFree(PHDASTREAM pStream);
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| 254 | uint32_t hdaStreamGetUsed(PHDASTREAM pStream);
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| 255 | bool hdaStreamTransferIsScheduled(PHDASTREAM pStream);
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| 256 | uint64_t hdaStreamTransferGetNext(PHDASTREAM pStream);
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| 257 | int hdaStreamTransfer(PHDASTREAM pStream, uint32_t cbToProcessMax);
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| 258 | void hdaStreamLock(PHDASTREAM pStream);
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| 259 | void hdaStreamUnlock(PHDASTREAM pStream);
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| 260 | int hdaStreamRead(PHDASTREAM pStream, uint32_t cbToRead, uint32_t *pcbRead);
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| 261 | int hdaStreamWrite(PHDASTREAM pStream, const void *pvBuf, uint32_t cbBuf, uint32_t *pcbWritten);
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| 262 | void hdaStreamUpdate(PHDASTREAM pStream, bool fAsync);
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| 263 | # ifdef HDA_USE_DMA_ACCESS_HANDLER
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| 264 | bool hdaStreamRegisterDMAHandlers(PHDASTREAM pStream);
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| 265 | void hdaStreamUnregisterDMAHandlers(PHDASTREAM pStream);
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| 266 | # endif /* HDA_USE_DMA_ACCESS_HANDLER */
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| 267 | /** @} */
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| 268 |
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| 269 | /** @name Async I/O stream functions.
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| 270 | * @{
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| 271 | */
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| 272 | # ifdef VBOX_WITH_AUDIO_HDA_ASYNC_IO
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| 273 | DECLCALLBACK(int) hdaStreamAsyncIOThread(RTTHREAD hThreadSelf, void *pvUser);
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| 274 | int hdaStreamAsyncIOCreate(PHDASTREAM pStream);
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| 275 | int hdaStreamAsyncIODestroy(PHDASTREAM pStream);
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| 276 | int hdaStreamAsyncIONotify(PHDASTREAM pStream);
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| 277 | void hdaStreamAsyncIOLock(PHDASTREAM pStream);
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| 278 | void hdaStreamAsyncIOUnlock(PHDASTREAM pStream);
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| 279 | void hdaStreamAsyncIOEnable(PHDASTREAM pStream, bool fEnable);
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| 280 | # endif /* VBOX_WITH_AUDIO_HDA_ASYNC_IO */
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| 281 | /** @} */
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| 282 |
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| 283 | #endif /* IN_RING3 */
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| 284 |
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| 285 | #endif /* !HDA_STREAM_H */
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| 286 |
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