drivers/gpu/drm/i915/gvt/page_track.h

   1 /*
   2  * Copyright(c) 2011-2017 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
  25 #ifndef _GVT_PAGE_TRACK_H_
  26 #define _GVT_PAGE_TRACK_H_
  27
  28 #include <linux/types.h>
  29
  30 struct intel_vgpu;
  31 struct intel_vgpu_page_track;
  32
  33 typedef int (*gvt_page_track_handler_t)(
  34                         struct intel_vgpu_page_track *page_track,
  35                         u64 gpa, void *data, int bytes);
  36
  37 /* Track record for a write-protected guest page. */
  38 struct intel_vgpu_page_track {
  39         gvt_page_track_handler_t handler;
  40         bool tracked;
  41         void *priv_data;
  42 };
  43
  44 struct intel_vgpu_page_track *intel_vgpu_find_page_track(
  45                 struct intel_vgpu *vgpu, unsigned long gfn);
  46
  47 int intel_vgpu_register_page_track(struct intel_vgpu *vgpu,
  48                 unsigned long gfn, gvt_page_track_handler_t handler,
  49                 void *priv);
  50 void intel_vgpu_unregister_page_track(struct intel_vgpu *vgpu,
  51                 unsigned long gfn);
  52
  53 int intel_vgpu_enable_page_track(struct intel_vgpu *vgpu, unsigned long gfn);
  54 int intel_vgpu_disable_page_track(struct intel_vgpu *vgpu, unsigned long gfn);
  55
  56 int intel_vgpu_page_track_handler(struct intel_vgpu *vgpu, u64 gpa,
  57                 void *data, unsigned int bytes);
  58
  59 #endif