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 void (*resume_translation)(struct msm_mmu *mmu); 19 }; 20 21 enum msm_mmu_type { 22 MSM_MMU_GPUMMU, 23 MSM_MMU_IOMMU, 24 MSM_MMU_IOMMU_PAGETABLE, 25 }; 26 27 struct msm_mmu { 28 const struct msm_mmu_funcs *funcs; 29 struct device *dev; 30 int (*handler)(void *arg, unsigned long iova, int flags, void *data); 31 void *arg; 32 enum msm_mmu_type type; 33 }; 34 35 static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev, 36 const struct msm_mmu_funcs *funcs, enum msm_mmu_type type) 37 { 38 mmu->dev = dev; 39 mmu->funcs = funcs; 40 mmu->type = type; 41 } 42 43 struct msm_mmu *msm_iommu_new(struct device *dev, unsigned long quirks); 44 struct msm_mmu *msm_iommu_gpu_new(struct device *dev, struct msm_gpu *gpu, unsigned long quirks); 45 struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu); 46 47 static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg, 48 int (*handler)(void *arg, unsigned long iova, int flags, void *data)) 49 { 50 mmu->arg = arg; 51 mmu->handler = handler; 52 } 53 54 struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent); 55 56 void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base, 57 dma_addr_t *tran_error); 58 59 60 int msm_iommu_pagetable_params(struct msm_mmu *mmu, phys_addr_t *ttbr, 61 int *asid); 62 struct iommu_domain_geometry *msm_iommu_get_geometry(struct msm_mmu *mmu); 63 64 #endif /* __MSM_MMU_H__ */ 65