drivers/gpu/drm/msm/msm_mmu.h

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __MSM_MMU_H__
  19 #define __MSM_MMU_H__
  20
  21 #include <linux/iommu.h>
  22
  23 struct msm_mmu_funcs {
  24         int (*attach)(struct msm_mmu *mmu, const char * const *names, int cnt);
  25         void (*detach)(struct msm_mmu *mmu, const char * const *names, int cnt);
  26         int (*map)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt,
  27                         unsigned len, int prot);
  28         int (*unmap)(struct msm_mmu *mmu, uint64_t iova, unsigned len);
  29         void (*destroy)(struct msm_mmu *mmu);
  30 };
  31
  32 struct msm_mmu {
  33         const struct msm_mmu_funcs *funcs;
  34         struct device *dev;
  35         int (*handler)(void *arg, unsigned long iova, int flags);
  36         void *arg;
  37 };
  38
  39 static inline void msm_mmu_init(struct msm_mmu *mmu, struct device *dev,
  40                 const struct msm_mmu_funcs *funcs)
  41 {
  42         mmu->dev = dev;
  43         mmu->funcs = funcs;
  44 }
  45
  46 struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain);
  47 struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu);
  48
  49 static inline void msm_mmu_set_fault_handler(struct msm_mmu *mmu, void *arg,
  50                 int (*handler)(void *arg, unsigned long iova, int flags))
  51 {
  52         mmu->arg = arg;
  53         mmu->handler = handler;
  54 }
  55
  56 void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
  57                 dma_addr_t *tran_error);
  58
  59 #endif /* __MSM_MMU_H__ */