drivers/gpu/drm/i915/i915_pvinfo.h

   1 /*
   2  * Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
   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 (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #ifndef _I915_PVINFO_H_
  25 #define _I915_PVINFO_H_
  26
  27 #include <linux/types.h>
  28
  29 /* The MMIO offset of the shared info between guest and host emulator */
  30 #define VGT_PVINFO_PAGE 0x78000
  31 #define VGT_PVINFO_SIZE 0x1000
  32
  33 /*
  34  * The following structure pages are defined in GEN MMIO space
  35  * for virtualization. (One page for now)
  36  */
  37 #define VGT_MAGIC         0x4776544776544776ULL /* 'vGTvGTvG' */
  38 #define VGT_VERSION_MAJOR 1
  39 #define VGT_VERSION_MINOR 0
  40
  41 /*
  42  * notifications from guest to vgpu device model
  43  */
  44 enum vgt_g2v_type {
  45         VGT_G2V_PPGTT_L3_PAGE_TABLE_CREATE = 2,
  46         VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY,
  47         VGT_G2V_PPGTT_L4_PAGE_TABLE_CREATE,
  48         VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY,
  49         VGT_G2V_EXECLIST_CONTEXT_CREATE,
  50         VGT_G2V_EXECLIST_CONTEXT_DESTROY,
  51         VGT_G2V_MAX,
  52 };
  53
  54 /*
  55  * VGT capabilities type
  56  */
  57 #define VGT_CAPS_FULL_PPGTT             BIT(2)
  58 #define VGT_CAPS_HWSP_EMULATION         BIT(3)
  59 #define VGT_CAPS_HUGE_GTT               BIT(4)
  60
  61 struct vgt_if {
  62         u64 magic;              /* VGT_MAGIC */
  63         u16 version_major;
  64         u16 version_minor;
  65         u32 vgt_id;             /* ID of vGT instance */
  66         u32 vgt_caps;           /* VGT capabilities */
  67         u32 rsv1[11];           /* pad to offset 0x40 */
  68         /*
  69          *  Data structure to describe the balooning info of resources.
  70          *  Each VM can only have one portion of continuous area for now.
  71          *  (May support scattered resource in future)
  72          *  (starting from offset 0x40)
  73          */
  74         struct {
  75                 /* Aperture register balooning */
  76                 struct {
  77                         u32 base;
  78                         u32 size;
  79                 } mappable_gmadr;       /* aperture */
  80                 /* GMADR register balooning */
  81                 struct {
  82                         u32 base;
  83                         u32 size;
  84                 } nonmappable_gmadr;    /* non aperture */
  85                 /* allowed fence registers */
  86                 u32 fence_num;
  87                 u32 rsv2[3];
  88         } avail_rs;             /* available/assigned resource */
  89         u32 rsv3[0x200 - 24];   /* pad to half page */
  90         /*
  91          * The bottom half page is for response from Gfx driver to hypervisor.
  92          */
  93         u32 rsv4;
  94         u32 display_ready;      /* ready for display owner switch */
  95
  96         u32 rsv5[4];
  97
  98         u32 g2v_notify;
  99         u32 rsv6[5];
 100
 101         u32 cursor_x_hot;
 102         u32 cursor_y_hot;
 103
 104         struct {
 105                 u32 lo;
 106                 u32 hi;
 107         } pdp[4];
 108
 109         u32 execlist_context_descriptor_lo;
 110         u32 execlist_context_descriptor_hi;
 111
 112         u32  rsv7[0x200 - 24];    /* pad to one page */
 113 } __packed;
 114
 115 #define vgtif_offset(x) (offsetof(struct vgt_if, x))
 116
 117 #define vgtif_reg(x) _MMIO(VGT_PVINFO_PAGE + vgtif_offset(x))
 118
 119 /* vGPU display status to be used by the host side */
 120 #define VGT_DRV_DISPLAY_NOT_READY 0
 121 #define VGT_DRV_DISPLAY_READY     1  /* ready for display switch */
 122
 123 #endif /* _I915_PVINFO_H_ */