LXR linux/drivers/gpu/drm/i915/i915

   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/* The MMIO offset of the shared info between guest and host emulator */
  28#define VGT_PVINFO_PAGE 0x78000
  29#define VGT_PVINFO_SIZE 0x1000
  30
  31/*
  32 * The following structure pages are defined in GEN MMIO space
  33 * for virtualization. (One page for now)
  34 */
  35#define VGT_MAGIC         0x4776544776544776ULL /* 'vGTvGTvG' */
  36#define VGT_VERSION_MAJOR 1
  37#define VGT_VERSION_MINOR 0
  38
  39/*
  40 * notifications from guest to vgpu device model
  41 */
  42enum vgt_g2v_type {
  43        VGT_G2V_PPGTT_L3_PAGE_TABLE_CREATE = 2,
  44        VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY,
  45        VGT_G2V_PPGTT_L4_PAGE_TABLE_CREATE,
  46        VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY,
  47        VGT_G2V_EXECLIST_CONTEXT_CREATE,
  48        VGT_G2V_EXECLIST_CONTEXT_DESTROY,
  49        VGT_G2V_MAX,
  50};
  51
  52/*
  53 * VGT capabilities type
  54 */
  55#define VGT_CAPS_FULL_48BIT_PPGTT       BIT(2)
  56#define VGT_CAPS_HWSP_EMULATION         BIT(3)
  57
  58struct vgt_if {
  59        u64 magic;              /* VGT_MAGIC */
  60        u16 version_major;
  61        u16 version_minor;
  62        u32 vgt_id;             /* ID of vGT instance */
  63        u32 vgt_caps;           /* VGT capabilities */
  64        u32 rsv1[11];           /* pad to offset 0x40 */
  65        /*
  66         *  Data structure to describe the balooning info of resources.
  67         *  Each VM can only have one portion of continuous area for now.
  68         *  (May support scattered resource in future)
  69         *  (starting from offset 0x40)
  70         */
  71        struct {
  72                /* Aperture register balooning */
  73                struct {
  74                        u32 base;
  75                        u32 size;
  76                } mappable_gmadr;       /* aperture */
  77                /* GMADR register balooning */
  78                struct {
  79                        u32 base;
  80                        u32 size;
  81                } nonmappable_gmadr;    /* non aperture */
  82                /* allowed fence registers */
  83                u32 fence_num;
  84                u32 rsv2[3];
  85        } avail_rs;             /* available/assigned resource */
  86        u32 rsv3[0x200 - 24];   /* pad to half page */
  87        /*
  88         * The bottom half page is for response from Gfx driver to hypervisor.
  89         */
  90        u32 rsv4;
  91        u32 display_ready;      /* ready for display owner switch */
  92
  93        u32 rsv5[4];
  94
  95        u32 g2v_notify;
  96        u32 rsv6[7];
  97
  98        struct {
  99                u32 lo;
 100                u32 hi;
 101        } pdp[4];
 102
 103        u32 execlist_context_descriptor_lo;
 104        u32 execlist_context_descriptor_hi;
 105
 106        u32  rsv7[0x200 - 24];    /* pad to one page */
 107} __packed;
 108
 109#define vgtif_reg(x) \
 110        _MMIO((VGT_PVINFO_PAGE + offsetof(struct vgt_if, x)))
 111
 112/* vGPU display status to be used by the host side */
 113#define VGT_DRV_DISPLAY_NOT_READY 0
 114#define VGT_DRV_DISPLAY_READY     1  /* ready for display switch */
 115
 116#endif /* _I915_PVINFO_H_ */
 117