xref: /openbmc/linux/drivers/gpu/drm/i915/gvt/page_track.h (revision ab11a927)
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
60