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 #define ETNAVIV_PROT_READ       (1 << 0)
  21 #define ETNAVIV_PROT_WRITE      (1 << 1)
  22
  23 enum etnaviv_iommu_version {
  24         ETNAVIV_IOMMU_V1 = 0,
  25         ETNAVIV_IOMMU_V2,
  26 };
  27
  28 struct etnaviv_gpu;
  29 struct etnaviv_vram_mapping;
  30 struct etnaviv_iommu_domain;
  31
  32 struct etnaviv_iommu_domain_ops {
  33         void (*free)(struct etnaviv_iommu_domain *);
  34         int (*map)(struct etnaviv_iommu_domain *domain, unsigned long iova,
  35                    phys_addr_t paddr, size_t size, int prot);
  36         size_t (*unmap)(struct etnaviv_iommu_domain *domain, unsigned long iova,
  37                         size_t size);
  38         size_t (*dump_size)(struct etnaviv_iommu_domain *);
  39         void (*dump)(struct etnaviv_iommu_domain *, void *);
  40 };
  41
  42 struct etnaviv_iommu_domain {
  43         struct device *dev;
  44         void *bad_page_cpu;
  45         dma_addr_t bad_page_dma;
  46         u64 base;
  47         u64 size;
  48
  49         const struct etnaviv_iommu_domain_ops *ops;
  50 };
  51
  52 struct etnaviv_iommu {
  53         struct etnaviv_gpu *gpu;
  54         struct etnaviv_iommu_domain *domain;
  55
  56         enum etnaviv_iommu_version version;
  57
  58         /* memory manager for GPU address area */
  59         struct mutex lock;
  60         struct list_head mappings;
  61         struct drm_mm mm;
  62         u32 last_iova;
  63         bool need_flush;
  64 };
  65
  66 struct etnaviv_gem_object;
  67
  68 int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
  69         struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
  70         struct etnaviv_vram_mapping *mapping);
  71 void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
  72         struct etnaviv_vram_mapping *mapping);
  73
  74 int etnaviv_iommu_get_suballoc_va(struct etnaviv_gpu *gpu, dma_addr_t paddr,
  75                                   struct drm_mm_node *vram_node, size_t size,
  76                                   u32 *iova);
  77 void etnaviv_iommu_put_suballoc_va(struct etnaviv_gpu *gpu,
  78                                    struct drm_mm_node *vram_node, size_t size,
  79                                    u32 iova);
  80
  81 size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu);
  82 void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
  83
  84 struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu);
  85 void etnaviv_iommu_destroy(struct etnaviv_iommu *iommu);
  86 void etnaviv_iommu_restore(struct etnaviv_gpu *gpu);
  87
  88 #endif /* __ETNAVIV_MMU_H__ */