12fc7b156SRob Clark // SPDX-License-Identifier: GPL-2.0-only 22fc7b156SRob Clark /* 32fc7b156SRob Clark * Copyright (C) 2020 Google, Inc 42fc7b156SRob Clark */ 52fc7b156SRob Clark 62fc7b156SRob Clark #ifndef __ADRENO_SMMU_PRIV_H 72fc7b156SRob Clark #define __ADRENO_SMMU_PRIV_H 82fc7b156SRob Clark 92fc7b156SRob Clark #include <linux/io-pgtable.h> 102fc7b156SRob Clark 112fc7b156SRob Clark /** 12ab5df7b9SJordan Crouse * struct adreno_smmu_fault_info - container for key fault information 13ab5df7b9SJordan Crouse * 14ab5df7b9SJordan Crouse * @far: The faulting IOVA from ARM_SMMU_CB_FAR 15ab5df7b9SJordan Crouse * @ttbr0: The current TTBR0 pagetable from ARM_SMMU_CB_TTBR0 16ab5df7b9SJordan Crouse * @contextidr: The value of ARM_SMMU_CB_CONTEXTIDR 17ab5df7b9SJordan Crouse * @fsr: The fault status from ARM_SMMU_CB_FSR 18ab5df7b9SJordan Crouse * @fsynr0: The value of FSYNR0 from ARM_SMMU_CB_FSYNR0 19ab5df7b9SJordan Crouse * @fsynr1: The value of FSYNR1 from ARM_SMMU_CB_FSYNR0 20ab5df7b9SJordan Crouse * @cbfrsynra: The value of CBFRSYNRA from ARM_SMMU_GR1_CBFRSYNRA(idx) 21ab5df7b9SJordan Crouse * 22ab5df7b9SJordan Crouse * This struct passes back key page fault information to the GPU driver 23ab5df7b9SJordan Crouse * through the get_fault_info function pointer. 24ab5df7b9SJordan Crouse * The GPU driver can use this information to print informative 25ab5df7b9SJordan Crouse * log messages and provide deeper GPU specific insight into the fault. 26ab5df7b9SJordan Crouse */ 27ab5df7b9SJordan Crouse struct adreno_smmu_fault_info { 28ab5df7b9SJordan Crouse u64 far; 29ab5df7b9SJordan Crouse u64 ttbr0; 30ab5df7b9SJordan Crouse u32 contextidr; 31ab5df7b9SJordan Crouse u32 fsr; 32ab5df7b9SJordan Crouse u32 fsynr0; 33ab5df7b9SJordan Crouse u32 fsynr1; 34ab5df7b9SJordan Crouse u32 cbfrsynra; 35ab5df7b9SJordan Crouse }; 36ab5df7b9SJordan Crouse 37ab5df7b9SJordan Crouse /** 382fc7b156SRob Clark * struct adreno_smmu_priv - private interface between adreno-smmu and GPU 392fc7b156SRob Clark * 402fc7b156SRob Clark * @cookie: An opque token provided by adreno-smmu and passed 412fc7b156SRob Clark * back into the callbacks 422fc7b156SRob Clark * @get_ttbr1_cfg: Get the TTBR1 config for the GPUs context-bank 432fc7b156SRob Clark * @set_ttbr0_cfg: Set the TTBR0 config for the GPUs context bank. A 442fc7b156SRob Clark * NULL config disables TTBR0 translation, otherwise 452fc7b156SRob Clark * TTBR0 translation is enabled with the specified cfg 46ab5df7b9SJordan Crouse * @get_fault_info: Called by the GPU fault handler to get information about 47ab5df7b9SJordan Crouse * the fault 48*ba6014a4SRob Clark * @set_stall: Configure whether stall on fault (CFCFG) is enabled. Call 49*ba6014a4SRob Clark * before set_ttbr0_cfg(). If stalling on fault is enabled, 50*ba6014a4SRob Clark * the GPU driver must call resume_translation() 51*ba6014a4SRob Clark * @resume_translation: Resume translation after a fault 52*ba6014a4SRob Clark * 532fc7b156SRob Clark * 542fc7b156SRob Clark * The GPU driver (drm/msm) and adreno-smmu work together for controlling 552fc7b156SRob Clark * the GPU's SMMU instance. This is by necessity, as the GPU is directly 562fc7b156SRob Clark * updating the SMMU for context switches, while on the other hand we do 572fc7b156SRob Clark * not want to duplicate all of the initial setup logic from arm-smmu. 582fc7b156SRob Clark * 592fc7b156SRob Clark * This private interface is used for the two drivers to coordinate. The 602fc7b156SRob Clark * cookie and callback functions are populated when the GPU driver attaches 612fc7b156SRob Clark * it's domain. 622fc7b156SRob Clark */ 632fc7b156SRob Clark struct adreno_smmu_priv { 642fc7b156SRob Clark const void *cookie; 652fc7b156SRob Clark const struct io_pgtable_cfg *(*get_ttbr1_cfg)(const void *cookie); 662fc7b156SRob Clark int (*set_ttbr0_cfg)(const void *cookie, const struct io_pgtable_cfg *cfg); 67ab5df7b9SJordan Crouse void (*get_fault_info)(const void *cookie, struct adreno_smmu_fault_info *info); 68*ba6014a4SRob Clark void (*set_stall)(const void *cookie, bool enabled); 69*ba6014a4SRob Clark void (*resume_translation)(const void *cookie, bool terminate); 702fc7b156SRob Clark }; 712fc7b156SRob Clark 722fc7b156SRob Clark #endif /* __ADRENO_SMMU_PRIV_H */ 73