/** @file
 * VBox Host Guest Shared Memory Interface (HGSMI), Host/Guest shared part.
 */

/*
 * Copyright (C) 2006-2017 Oracle Corporation
 *
 * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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_Graphics_HGSMIChSetup_h
#define ___VBox_Graphics_HGSMIChSetup_h

#include "HGSMIDefs.h"

/* HGSMI setup and configuration channel commands and data structures. */
#define HGSMI_CC_HOST_FLAGS_LOCATION 0 /* Tell the host the location of HGSMIHOSTFLAGS structure,
                                        * where the host can write information about pending
                                        * buffers, etc, and which can be quickly polled by
                                        * the guest without a need to port IO.
                                        */

typedef struct HGSMIBUFFERLOCATION
{
    HGSMIOFFSET offLocation;
    HGSMISIZE   cbLocation;
} HGSMIBUFFERLOCATION;
AssertCompileSize(HGSMIBUFFERLOCATION, 8);

/* HGSMI setup and configuration data structures. */
/* host->guest commands pending, should be accessed under FIFO lock only */
#define HGSMIHOSTFLAGS_COMMANDS_PENDING    UINT32_C(0x1)
/* IRQ is fired, should be accessed under VGAState::lock only  */
#define HGSMIHOSTFLAGS_IRQ                 UINT32_C(0x2)
#ifdef VBOX_WITH_WDDM
/* one or more guest commands is completed, should be accessed under FIFO lock only */
# define HGSMIHOSTFLAGS_GCOMMAND_COMPLETED UINT32_C(0x4)
/* watchdog timer interrupt flag (used for debugging), should be accessed under VGAState::lock only */
# define HGSMIHOSTFLAGS_WATCHDOG           UINT32_C(0x8)
#endif
/* vsync interrupt flag, should be accessed under VGAState::lock only */
#define HGSMIHOSTFLAGS_VSYNC               UINT32_C(0x10)
/** monitor hotplug flag, should be accessed under VGAState::lock only */
#define HGSMIHOSTFLAGS_HOTPLUG             UINT32_C(0x20)
/** Cursor capability state change flag, should be accessed under
 * VGAState::lock only.  @see VBVACONF32. */
#define HGSMIHOSTFLAGS_CURSOR_CAPABILITIES UINT32_C(0x40)

typedef struct HGSMIHOSTFLAGS
{
    /* host flags can be accessed and modified in multiple threads concurrently,
     * e.g. CrOpenGL HGCM and GUI threads when to completing HGSMI 3D and Video Accel respectively,
     * EMT thread when dealing with HGSMI command processing, etc.
     * Besides settings/cleaning flags atomically, some each flag has its own special sync restrictions,
     * see commants for flags definitions above */
    volatile uint32_t u32HostFlags;
    uint32_t au32Reserved[3];
} HGSMIHOSTFLAGS;
AssertCompileSize(HGSMIHOSTFLAGS, 16);

#endif