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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  */
30 struct 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 */