drivers/gpu/drm/etnaviv/etnaviv_mmu.h

   1 /*
   2  * Copyright (C) 2015 Etnaviv Project
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 as published by
   6  * the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #ifndef __ETNAVIV_MMU_H__
  18 #define __ETNAVIV_MMU_H__
  19
  20 #include <linux/iommu.h>
  21
  22 enum etnaviv_iommu_version {
  23         ETNAVIV_IOMMU_V1 = 0,
  24         ETNAVIV_IOMMU_V2,
  25 };
  26
  27 struct etnaviv_gpu;
  28 struct etnaviv_vram_mapping;
  29
  30 struct etnaviv_iommu_ops {
  31         struct iommu_ops ops;
  32         size_t (*dump_size)(struct iommu_domain *);
  33         void (*dump)(struct iommu_domain *, void *);
  34 };
  35
  36 struct etnaviv_iommu {
  37         struct etnaviv_gpu *gpu;
  38         struct iommu_domain *domain;
  39
  40         enum etnaviv_iommu_version version;
  41
  42         /* memory manager for GPU address area */
  43         struct mutex lock;
  44         struct list_head mappings;
  45         struct drm_mm mm;
  46         u32 last_iova;
  47         bool need_flush;
  48 };
  49
  50 struct etnaviv_gem_object;
  51
  52 int etnaviv_iommu_attach(struct etnaviv_iommu *iommu, const char **names,
  53         int cnt);
  54 int etnaviv_iommu_map(struct etnaviv_iommu *iommu, u32 iova,
  55         struct sg_table *sgt, unsigned len, int prot);
  56 int etnaviv_iommu_unmap(struct etnaviv_iommu *iommu, u32 iova,
  57         struct sg_table *sgt, unsigned len);
  58 int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
  59         struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
  60         struct etnaviv_vram_mapping *mapping);
  61 void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
  62         struct etnaviv_vram_mapping *mapping);
  63 void etnaviv_iommu_destroy(struct etnaviv_iommu *iommu);
  64
  65 u32 etnaviv_iommu_get_cmdbuf_va(struct etnaviv_gpu *gpu,
  66                                 struct etnaviv_cmdbuf *buf);
  67 void etnaviv_iommu_put_cmdbuf_va(struct etnaviv_gpu *gpu,
  68                                  struct etnaviv_cmdbuf *buf);
  69
  70 size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu);
  71 void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
  72
  73 struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu);
  74 void etnaviv_iommu_restore(struct etnaviv_gpu *gpu);
  75
  76 #endif /* __ETNAVIV_MMU_H__ */