1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #ifndef __MSM_MMU_H__ 8 #define __MSM_MMU_H__ 9 10 #include <linux/iommu.h> 11 12 struct msm_mmu_funcs { 13 void (*detach)(struct msm_mmu *mmu); 14 int (*map)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt, 15 size_t len, int prot); 16 int (*unmap)(struct msm_mmu *mmu, uint64_t iova, size_t len); 17 void (*destroy)(struct msm_mmu *mmu); 18 }; 19 20 enum msm_mmu_type { 21 MSM_MMU_GPUMMU, 22 MSM_MMU_IOMMU, 23 MSM_MMU_IOMMU_PAGETABLE, 24 }; 25 26 struct msm_mmu { 27 const struct msm_mmu_funcs *funcs; 28 struct device *dev; 29 int (*handler)(void *arg, unsigned long iova, int flags); 30 void *arg; 31 enum msm_mmu_type type; 32 }; 33 34 static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev, 35 const struct msm_mmu_funcs *funcs, enum msm_mmu_type type) 36 { 37 mmu->dev = dev; 38 mmu->funcs = funcs; 39 mmu->type = type; 40 } 41 42 struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain); 43 struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu); 44 45 static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg, 46 int (*handler)(void *arg, unsigned long iova, int flags)) 47 { 48 mmu->arg = arg; 49 mmu->handler = handler; 50 } 51 52 struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent); 53 54 void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base, 55 dma_addr_t *tran_error); 56 57 58 int msm_iommu_pagetable_params(struct msm_mmu *mmu, phys_addr_t *ttbr, 59 int *asid); 60 61 #endif /* __MSM_MMU_H__ */ 62