1 files changed, 114 insertions, 0 deletions
diff --git a/include/VBox/Graphics/HGSMIContext.h b/include/VBox/Graphics/HGSMIContext.h
new file mode 100644
index 00000000..23e810c0
--- /dev/null
+++ b/include/VBox/Graphics/HGSMIContext.h
@@ -0,0 +1,114 @@
+/* $Id: HGSMIContext.h $ */
+/** @file
+ * VBox Host Guest Shared Memory Interface (HGSMI) - command contexts.
+ */
+
+/*
+ * Copyright (C) 2006-2022 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_HGSMIContext_h
+#define VBOX_INCLUDED_Graphics_HGSMIContext_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include "HGSMI.h"
+#include "HGSMIChSetup.h"
+#include "VBoxVideoIPRT.h"
+
+#ifdef VBOX_WDDM_MINIPORT
+# include "wddm/VBoxMPShgsmi.h"
+ typedef VBOXSHGSMI HGSMIGUESTCMDHEAP;
+# define HGSMIGUESTCMDHEAP_GET(_p) (&(_p)->Heap)
+#else
+ typedef HGSMIHEAP HGSMIGUESTCMDHEAP;
+# define HGSMIGUESTCMDHEAP_GET(_p) (_p)
+#endif
+
+RT_C_DECLS_BEGIN
+
+/**
+ * Structure grouping the context needed for submitting commands to the host
+ * via HGSMI
+ */
+typedef struct HGSMIGUESTCOMMANDCONTEXT
+{
+    /** Information about the memory heap located in VRAM from which data
+     * structures to be sent to the host are allocated. */
+    HGSMIGUESTCMDHEAP heapCtx;
+    /** The I/O port used for submitting commands to the host by writing their
+     * offsets into the heap. */
+    RTIOPORT port;
+} HGSMIGUESTCOMMANDCONTEXT, *PHGSMIGUESTCOMMANDCONTEXT;
+
+
+/**
+ * Structure grouping the context needed for receiving commands from the host
+ * via HGSMI
+ */
+typedef struct HGSMIHOSTCOMMANDCONTEXT
+{
+    /** Information about the memory area located in VRAM in which the host
+     * places data structures to be read by the guest. */
+    HGSMIAREA areaCtx;
+    /** Convenience structure used for matching host commands to handlers. */
+    /** @todo handlers are registered individually in code rather than just
+     * passing a static structure in order to gain extra flexibility.  There is
+     * currently no expected usage case for this though.  Is the additional
+     * complexity really justified? */
+    HGSMICHANNELINFO channels;
+    /** Flag to indicate that one thread is currently processing the command
+     * queue. */
+    volatile bool fHostCmdProcessing;
+    /* Pointer to the VRAM location where the HGSMI host flags are kept. */
+    volatile HGSMIHOSTFLAGS *pfHostFlags;
+    /** The I/O port used for receiving commands from the host as offsets into
+     * the memory area and sending back confirmations (command completion,
+     * IRQ acknowlegement). */
+    RTIOPORT port;
+} HGSMIHOSTCOMMANDCONTEXT, *PHGSMIHOSTCOMMANDCONTEXT;
+
+/** @name HGSMI context initialisation APIs.
+ * @{ */
+
+/** @todo we should provide a cleanup function too as part of the API */
+DECLHIDDEN(int)      VBoxHGSMISetupGuestContext(PHGSMIGUESTCOMMANDCONTEXT pCtx,
+                                                void *pvGuestHeapMemory,
+                                                uint32_t cbGuestHeapMemory,
+                                                uint32_t offVRAMGuestHeapMemory,
+                                                const HGSMIENV *pEnv);
+DECLHIDDEN(void)     VBoxHGSMISetupHostContext(PHGSMIHOSTCOMMANDCONTEXT pCtx,
+                                               void *pvBaseMapping,
+                                               uint32_t offHostFlags,
+                                               void *pvHostAreaMapping,
+                                               uint32_t offVRAMHostArea,
+                                               uint32_t cbHostArea);
+
+/** @}  */
+
+RT_C_DECLS_END
+
+#endif /* !VBOX_INCLUDED_Graphics_HGSMIContext_h */
+