LXR linux/drivers/gpu/drm/msm/msm

   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        int (*attach)(struct msm_mmu *mmu, const char * const *names, int cnt);
  14        void (*detach)(struct msm_mmu *mmu, const char * const *names, int cnt);
  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
  21struct 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
  28static 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
  35struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain);
  36struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
  37
  38static 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
  45void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
  46                dma_addr_t *tran_error);
  47
  48#endif /* __MSM_MMU_H__ */
  49