LXR linux/drivers/gpu/drm/etnaviv/etnaviv

   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
  23enum etnaviv_iommu_version {
  24        ETNAVIV_IOMMU_V1 = 0,
  25        ETNAVIV_IOMMU_V2,
  26};
  27
  28struct etnaviv_gpu;
  29struct etnaviv_vram_mapping;
  30struct etnaviv_iommu_domain;
  31
  32struct 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
  42struct 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
  52struct 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
  66struct etnaviv_gem_object;
  67
  68int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
  69        struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
  70        struct etnaviv_vram_mapping *mapping);
  71void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
  72        struct etnaviv_vram_mapping *mapping);
  73
  74int 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);
  77void etnaviv_iommu_put_suballoc_va(struct etnaviv_gpu *gpu,
  78                                   struct drm_mm_node *vram_node, size_t size,
  79                                   u32 iova);
  80
  81size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu);
  82void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
  83
  84struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu);
  85void etnaviv_iommu_destroy(struct etnaviv_iommu *iommu);
  86void etnaviv_iommu_restore(struct etnaviv_gpu *gpu);
  87
  88#endif /* __ETNAVIV_MMU_H__ */
  89