| 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 | |
| 46 | static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg, |
| 47 | int (*handler)(void *arg, unsigned long iova, int flags, void *data)) |
| 48 | { |
| 49 | mmu->arg = arg; |
| 50 | mmu->handler = handler; |
| 51 | } |
| 52 | |
| 53 | struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent); |
| 54 | |
| 55 | int msm_iommu_pagetable_params(struct msm_mmu *mmu, phys_addr_t *ttbr, |
| 56 | int *asid); |
| 57 | struct iommu_domain_geometry *msm_iommu_get_geometry(struct msm_mmu *mmu); |
| 58 | |
| 59 | #endif /* __MSM_MMU_H__ */ |