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Diffstat (limited to 'include/VBox/Graphics/HGSMIDefs.h')
| -rw-r--r-- | include/VBox/Graphics/HGSMIDefs.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/include/VBox/Graphics/HGSMIDefs.h b/include/VBox/Graphics/HGSMIDefs.h new file mode 100644 index 00000000..caa0f556 --- /dev/null +++ b/include/VBox/Graphics/HGSMIDefs.h @@ -0,0 +1,128 @@ +/* $Id: HGSMIDefs.h $ */ +/** @file + * VBox Host Guest Shared Memory Interface (HGSMI) - shared part - types and defines. + */ + +/* + * Copyright (C) 2006-2023 Oracle and/or its affiliates. + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef VBOX_INCLUDED_Graphics_HGSMIDefs_h +#define VBOX_INCLUDED_Graphics_HGSMIDefs_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include "VBoxVideoIPRT.h" + +/* HGSMI uses 32 bit offsets and sizes. */ +typedef uint32_t HGSMISIZE; +typedef uint32_t HGSMIOFFSET; + +#define HGSMIOFFSET_VOID ((HGSMIOFFSET)~0) + +/** + * Describes a shared memory area buffer. + * + * Used for calculations with offsets and for buffers verification. + */ +typedef struct HGSMIAREA +{ + uint8_t *pu8Base; /**< The starting address of the area. Corresponds to offset 'offBase'. */ + HGSMIOFFSET offBase; /**< The starting offset of the area. */ + HGSMIOFFSET offLast; /**< The last valid offset: offBase + cbArea - 1 - (sizeof(header) + sizeof(tail)). */ + HGSMISIZE cbArea; /**< Size of the area. */ +} HGSMIAREA; + + +/* The buffer description flags. */ +#define HGSMI_BUFFER_HEADER_F_SEQ_MASK 0x03 /* Buffer sequence type mask. */ +#define HGSMI_BUFFER_HEADER_F_SEQ_SINGLE 0x00 /* Single buffer, not a part of a sequence. */ +#define HGSMI_BUFFER_HEADER_F_SEQ_START 0x01 /* The first buffer in a sequence. */ +#define HGSMI_BUFFER_HEADER_F_SEQ_CONTINUE 0x02 /* A middle buffer in a sequence. */ +#define HGSMI_BUFFER_HEADER_F_SEQ_END 0x03 /* The last buffer in a sequence. */ + + +#pragma pack(1) /** @todo not necessary. use AssertCompileSize instead. */ +/* 16 bytes buffer header. */ +typedef struct HGSMIBUFFERHEADER +{ + uint32_t u32DataSize; /* Size of data that follows the header. */ + + uint8_t u8Flags; /* The buffer description: HGSMI_BUFFER_HEADER_F_* */ + + uint8_t u8Channel; /* The channel the data must be routed to. */ + uint16_t u16ChannelInfo; /* Opaque to the HGSMI, used by the channel. */ + + union { + uint8_t au8Union[8]; /* Opaque placeholder to make the union 8 bytes. */ + + struct + { /* HGSMI_BUFFER_HEADER_F_SEQ_SINGLE */ + uint32_t u32Reserved1; /* A reserved field, initialize to 0. */ + uint32_t u32Reserved2; /* A reserved field, initialize to 0. */ + } Buffer; + + struct + { /* HGSMI_BUFFER_HEADER_F_SEQ_START */ + uint32_t u32SequenceNumber; /* The sequence number, the same for all buffers in the sequence. */ + uint32_t u32SequenceSize; /* The total size of the sequence. */ + } SequenceStart; + + struct + { /* HGSMI_BUFFER_HEADER_F_SEQ_CONTINUE and HGSMI_BUFFER_HEADER_F_SEQ_END */ + uint32_t u32SequenceNumber; /* The sequence number, the same for all buffers in the sequence. */ + uint32_t u32SequenceOffset; /* Data offset in the entire sequence. */ + } SequenceContinue; + } u; +} HGSMIBUFFERHEADER; + +/* 8 bytes buffer tail. */ +typedef struct HGSMIBUFFERTAIL +{ + uint32_t u32Reserved; /* Reserved, must be initialized to 0. */ + uint32_t u32Checksum; /* Verifyer for the buffer header and offset and for first 4 bytes of the tail. */ +} HGSMIBUFFERTAIL; +#pragma pack() + +AssertCompileSize(HGSMIBUFFERHEADER, 16); +AssertCompileSize(HGSMIBUFFERTAIL, 8); + +/* The size of the array of channels. Array indexes are uint8_t. Note: the value must not be changed. */ +#define HGSMI_NUMBER_OF_CHANNELS 0x100 + +typedef struct HGSMIENV +{ + /* Environment context pointer. */ + void *pvEnv; + + /* Allocate system memory. */ + DECLCALLBACKMEMBER(void *, pfnAlloc,(void *pvEnv, HGSMISIZE cb)); + + /* Free system memory. */ + DECLCALLBACKMEMBER(void, pfnFree,(void *pvEnv, void *pv)); +} HGSMIENV; + +#endif /* !VBOX_INCLUDED_Graphics_HGSMIDefs_h */ + |