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
12struct 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
21enum msm_mmu_type {
22 MSM_MMU_GPUMMU,
23 MSM_MMU_IOMMU,
24 MSM_MMU_IOMMU_PAGETABLE,
25};
26
27struct 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
35static 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
43struct msm_mmu *msm_iommu_new(struct device *dev, unsigned long quirks);
44struct msm_mmu *msm_iommu_gpu_new(struct device *dev, struct msm_gpu *gpu, unsigned long quirks);
45struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
46
47static 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
54struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent);
55
56void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
57 dma_addr_t *tran_error);
58
59
60int msm_iommu_pagetable_params(struct msm_mmu *mmu, phys_addr_t *ttbr,
61 int *asid);
62struct iommu_domain_geometry *msm_iommu_get_geometry(struct msm_mmu *mmu);
63
64#endif /* __MSM_MMU_H__ */
65

source code of linux/drivers/gpu/drm/msm/msm_mmu.h