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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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e25e92e08e
Wire up support to stall the SMMU on iova fault, and collect a devcore- dump snapshot for easier debugging of faults. Currently this is a6xx-only, but mostly only because so far it is the only one using adreno-smmu-priv. Signed-off-by: Rob Clark <robdclark@chromium.org> Acked-by: Jordan Crouse <jordan@cosmicpenguin.net> Link: https://lore.kernel.org/r/20210610214431.539029-6-robdclark@gmail.com Signed-off-by: Rob Clark <robdclark@chromium.org>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*/
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#ifndef __MSM_MMU_H__
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#define __MSM_MMU_H__
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#include <linux/iommu.h>
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struct msm_mmu_funcs {
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void (*detach)(struct msm_mmu *mmu);
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int (*map)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt,
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size_t len, int prot);
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int (*unmap)(struct msm_mmu *mmu, uint64_t iova, size_t len);
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void (*destroy)(struct msm_mmu *mmu);
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void (*resume_translation)(struct msm_mmu *mmu);
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};
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enum msm_mmu_type {
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MSM_MMU_GPUMMU,
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MSM_MMU_IOMMU,
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MSM_MMU_IOMMU_PAGETABLE,
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};
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struct msm_mmu {
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const struct msm_mmu_funcs *funcs;
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struct device *dev;
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int (*handler)(void *arg, unsigned long iova, int flags, void *data);
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void *arg;
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enum msm_mmu_type type;
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};
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static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev,
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const struct msm_mmu_funcs *funcs, enum msm_mmu_type type)
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{
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mmu->dev = dev;
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mmu->funcs = funcs;
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mmu->type = type;
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}
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struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain);
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struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
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static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg,
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int (*handler)(void *arg, unsigned long iova, int flags, void *data))
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{
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mmu->arg = arg;
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mmu->handler = handler;
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}
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struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent);
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void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
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dma_addr_t *tran_error);
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int msm_iommu_pagetable_params(struct msm_mmu *mmu, phys_addr_t *ttbr,
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int *asid);
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#endif /* __MSM_MMU_H__ */
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