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         int (*attach)(struct msm_mmu *mmu);
  14         void (*detach)(struct msm_mmu *mmu);
  15         int (*map)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt,
  16                         unsigned len, int prot);
  17         int (*unmap)(struct msm_mmu *mmu, uint64_t iova, unsigned len);
  18         void (*destroy)(struct msm_mmu *mmu);
  19 };
  20
  21 struct msm_mmu {
  22         const struct msm_mmu_funcs *funcs;
  23         struct device *dev;
  24         int (*handler)(void *arg, unsigned long iova, int flags);
  25         void *arg;
  26 };
  27
  28 static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev,
  29                 const struct msm_mmu_funcs *funcs)
  30 {
  31         mmu->dev = dev;
  32         mmu->funcs = funcs;
  33 }
  34
  35 struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain);
  36 struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
  37
  38 static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg,
  39                 int (*handler)(void *arg, unsigned long iova, int flags))
  40 {
  41         mmu->arg = arg;
  42         mmu->handler = handler;
  43 }
  44
  45 void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
  46                 dma_addr_t *tran_error);
  47
  48 #endif /* __MSM_MMU_H__ */