1/*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright © 2017-2018 Intel Corporation
5 */
6
7#ifndef _INTEL_WOPCM_H_
8#define _INTEL_WOPCM_H_
9
10#include <linux/types.h>
11
12/**
13 * struct intel_wopcm - Overall WOPCM info and WOPCM regions.
14 * @size: Size of overall WOPCM.
15 * @guc: GuC WOPCM Region info.
16 * @guc.base: GuC WOPCM base which is offset from WOPCM base.
17 * @guc.size: Size of the GuC WOPCM region.
18 */
19struct intel_wopcm {
20 u32 size;
21 struct {
22 u32 base;
23 u32 size;
24 } guc;
25};
26
27/**
28 * intel_wopcm_guc_base()
29 * @wopcm: intel_wopcm structure
30 *
31 * Returns the base of the WOPCM shadowed region.
32 *
33 * Returns:
34 * 0 if GuC is not present or not in use.
35 * Otherwise, the GuC WOPCM base.
36 */
37static inline u32 intel_wopcm_guc_base(struct intel_wopcm *wopcm)
38{
39 return wopcm->guc.base;
40}
41
42/**
43 * intel_wopcm_guc_size()
44 * @wopcm: intel_wopcm structure
45 *
46 * Returns size of the WOPCM shadowed region.
47 *
48 * Returns:
49 * 0 if GuC is not present or not in use.
50 * Otherwise, the GuC WOPCM size.
51 */
52static inline u32 intel_wopcm_guc_size(struct intel_wopcm *wopcm)
53{
54 return wopcm->guc.size;
55}
56
57void intel_wopcm_init_early(struct intel_wopcm *wopcm);
58void intel_wopcm_init(struct intel_wopcm *wopcm);
59
60#endif
61

source code of linux/drivers/gpu/drm/i915/gt/intel_wopcm.h