drivers/staging/vboxvideo/hgsmi_ch_setup.h

   1 /*
   2  * Copyright (C) 2006-2017 Oracle Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #ifndef __HGSMI_CH_SETUP_H__
  24 #define __HGSMI_CH_SETUP_H__
  25
  26 /*
  27  * Tell the host the location of hgsmi_host_flags structure, where the host
  28  * can write information about pending buffers, etc, and which can be quickly
  29  * polled by the guest without a need to port IO.
  30  */
  31 #define HGSMI_CC_HOST_FLAGS_LOCATION 0
  32
  33 struct hgsmi_buffer_location {
  34         u32 buf_location;
  35         u32 buf_len;
  36 } __packed;
  37
  38 /* HGSMI setup and configuration data structures. */
  39 /* host->guest commands pending, should be accessed under FIFO lock only */
  40 #define HGSMIHOSTFLAGS_COMMANDS_PENDING    0x01u
  41 /* IRQ is fired, should be accessed under VGAState::lock only  */
  42 #define HGSMIHOSTFLAGS_IRQ                 0x02u
  43 /* vsync interrupt flag, should be accessed under VGAState::lock only */
  44 #define HGSMIHOSTFLAGS_VSYNC               0x10u
  45 /** monitor hotplug flag, should be accessed under VGAState::lock only */
  46 #define HGSMIHOSTFLAGS_HOTPLUG             0x20u
  47 /**
  48  * Cursor capability state change flag, should be accessed under
  49  * VGAState::lock only. @see vbva_conf32.
  50  */
  51 #define HGSMIHOSTFLAGS_CURSOR_CAPABILITIES 0x40u
  52
  53 struct hgsmi_host_flags {
  54         /*
  55          * Host flags can be accessed and modified in multiple threads
  56          * concurrently, e.g. CrOpenGL HGCM and GUI threads when completing
  57          * HGSMI 3D and Video Accel respectively, EMT thread when dealing with
  58          * HGSMI command processing, etc.
  59          * Besides settings/cleaning flags atomically, some flags have their
  60          * own special sync restrictions, see comments for flags above.
  61          */
  62         u32 host_flags;
  63         u32 reserved[3];
  64 } __packed;
  65
  66 #endif