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Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2020 Google, Inc
4 */
5
6#ifndef __ADRENO_SMMU_PRIV_H
7#define __ADRENO_SMMU_PRIV_H
8
9#include <linux/io-pgtable.h>
10
11/**
12 * struct adreno_smmu_priv - private interface between adreno-smmu and GPU
13 *
14 * @cookie: An opque token provided by adreno-smmu and passed
15 * back into the callbacks
16 * @get_ttbr1_cfg: Get the TTBR1 config for the GPUs context-bank
17 * @set_ttbr0_cfg: Set the TTBR0 config for the GPUs context bank. A
18 * NULL config disables TTBR0 translation, otherwise
19 * TTBR0 translation is enabled with the specified cfg
20 *
21 * The GPU driver (drm/msm) and adreno-smmu work together for controlling
22 * the GPU's SMMU instance. This is by necessity, as the GPU is directly
23 * updating the SMMU for context switches, while on the other hand we do
24 * not want to duplicate all of the initial setup logic from arm-smmu.
25 *
26 * This private interface is used for the two drivers to coordinate. The
27 * cookie and callback functions are populated when the GPU driver attaches
28 * it's domain.
29 */
30struct adreno_smmu_priv {
31 const void *cookie;
32 const struct io_pgtable_cfg *(*get_ttbr1_cfg)(const void *cookie);
33 int (*set_ttbr0_cfg)(const void *cookie, const struct io_pgtable_cfg *cfg);
34};
35
36#endif /* __ADRENO_SMMU_PRIV_H */