drivers/gpu/drm/msm/msm_mmu.h

   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__ */