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
msm_mmu_init(struct msm_mmu * mmu,struct device * dev,const struct msm_mmu_funcs * funcs,enum msm_mmu_type type)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, struct iommu_domain *domain);
44 struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
45
msm_mmu_set_fault_handler(struct msm_mmu * mmu,void * arg,int (* handler)(void * arg,unsigned long iova,int flags,void * data))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 void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
56 dma_addr_t *tran_error);
57
58
59 int msm_iommu_pagetable_params(struct msm_mmu *mmu, phys_addr_t *ttbr,
60 int *asid);
61
62 #endif /* __MSM_MMU_H__ */
63