| 1 | /* $Id: HGSMIContext.h 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox Host Guest Shared Memory Interface (HGSMI) - command contexts.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person
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| 10 | * obtaining a copy of this software and associated documentation
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| 11 | * files (the "Software"), to deal in the Software without
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| 12 | * restriction, including without limitation the rights to use,
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| 13 | * copy, modify, merge, publish, distribute, sublicense, and/or sell
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| 14 | * copies of the Software, and to permit persons to whom the
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| 15 | * Software is furnished to do so, subject to the following
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| 16 | * conditions:
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| 17 | *
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| 18 | * The above copyright notice and this permission notice shall be
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| 19 | * included in all copies or substantial portions of the Software.
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| 20 | *
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| 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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| 22 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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| 23 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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| 24 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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| 25 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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| 26 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 27 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 28 | * OTHER DEALINGS IN THE SOFTWARE.
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| 29 | */
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| 30 |
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| 31 | #ifndef VBOX_INCLUDED_Graphics_HGSMIContext_h
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| 32 | #define VBOX_INCLUDED_Graphics_HGSMIContext_h
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| 33 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 34 | # pragma once
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| 35 | #endif
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| 36 |
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| 37 | #include "HGSMI.h"
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| 38 | #include "HGSMIChSetup.h"
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| 39 | #include "VBoxVideoIPRT.h"
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| 40 |
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| 41 | #ifdef VBOX_WDDM_MINIPORT
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| 42 | # include "wddm/VBoxMPShgsmi.h"
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| 43 | typedef VBOXSHGSMI HGSMIGUESTCMDHEAP;
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| 44 | # define HGSMIGUESTCMDHEAP_GET(_p) (&(_p)->Heap)
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| 45 | #else
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| 46 | typedef HGSMIHEAP HGSMIGUESTCMDHEAP;
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| 47 | # define HGSMIGUESTCMDHEAP_GET(_p) (_p)
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| 48 | #endif
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| 49 |
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| 50 | RT_C_DECLS_BEGIN
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| 51 |
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| 52 | /**
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| 53 | * Structure grouping the context needed for submitting commands to the host
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| 54 | * via HGSMI
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| 55 | */
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| 56 | typedef struct HGSMIGUESTCOMMANDCONTEXT
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| 57 | {
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| 58 | /** Information about the memory heap located in VRAM from which data
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| 59 | * structures to be sent to the host are allocated. */
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| 60 | HGSMIGUESTCMDHEAP heapCtx;
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| 61 | /** The I/O port used for submitting commands to the host by writing their
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| 62 | * offsets into the heap. */
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| 63 | RTIOPORT port;
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| 64 | } HGSMIGUESTCOMMANDCONTEXT, *PHGSMIGUESTCOMMANDCONTEXT;
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| 65 |
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| 66 |
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| 67 | /**
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| 68 | * Structure grouping the context needed for receiving commands from the host
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| 69 | * via HGSMI
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| 70 | */
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| 71 | typedef struct HGSMIHOSTCOMMANDCONTEXT
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| 72 | {
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| 73 | /** Information about the memory area located in VRAM in which the host
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| 74 | * places data structures to be read by the guest. */
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| 75 | HGSMIAREA areaCtx;
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| 76 | /** Convenience structure used for matching host commands to handlers. */
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| 77 | /** @todo handlers are registered individually in code rather than just
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| 78 | * passing a static structure in order to gain extra flexibility. There is
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| 79 | * currently no expected usage case for this though. Is the additional
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| 80 | * complexity really justified? */
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| 81 | HGSMICHANNELINFO channels;
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| 82 | /** Flag to indicate that one thread is currently processing the command
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| 83 | * queue. */
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| 84 | volatile bool fHostCmdProcessing;
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| 85 | /* Pointer to the VRAM location where the HGSMI host flags are kept. */
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| 86 | volatile HGSMIHOSTFLAGS *pfHostFlags;
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| 87 | /** The I/O port used for receiving commands from the host as offsets into
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| 88 | * the memory area and sending back confirmations (command completion,
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| 89 | * IRQ acknowlegement). */
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| 90 | RTIOPORT port;
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| 91 | } HGSMIHOSTCOMMANDCONTEXT, *PHGSMIHOSTCOMMANDCONTEXT;
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| 92 |
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| 93 | /** @name HGSMI context initialisation APIs.
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| 94 | * @{ */
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| 95 |
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| 96 | /** @todo we should provide a cleanup function too as part of the API */
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| 97 | DECLHIDDEN(int) VBoxHGSMISetupGuestContext(PHGSMIGUESTCOMMANDCONTEXT pCtx,
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| 98 | void *pvGuestHeapMemory,
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| 99 | uint32_t cbGuestHeapMemory,
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| 100 | uint32_t offVRAMGuestHeapMemory,
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| 101 | const HGSMIENV *pEnv);
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| 102 | DECLHIDDEN(void) VBoxHGSMISetupHostContext(PHGSMIHOSTCOMMANDCONTEXT pCtx,
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| 103 | void *pvBaseMapping,
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| 104 | uint32_t offHostFlags,
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| 105 | void *pvHostAreaMapping,
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| 106 | uint32_t offVRAMHostArea,
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| 107 | uint32_t cbHostArea);
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| 108 |
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| 109 | /** @} */
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| 110 |
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| 111 | RT_C_DECLS_END
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| 112 |
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| 113 | #endif /* !VBOX_INCLUDED_Graphics_HGSMIContext_h */
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| 114 |
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