drivers/gpu/drm/tegra/gem.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Tegra host1x GEM implementation
   4  *
   5  * Copyright (c) 2012-2013, NVIDIA Corporation.
   6  */
   7
   8 #ifndef __HOST1X_GEM_H
   9 #define __HOST1X_GEM_H
  10
  11 #include <linux/host1x.h>
  12
  13 #include <drm/drm.h>
  14 #include <drm/drm_gem.h>
  15
  16 #define TEGRA_BO_BOTTOM_UP (1 << 0)
  17
  18 enum tegra_bo_tiling_mode {
  19         TEGRA_BO_TILING_MODE_PITCH,
  20         TEGRA_BO_TILING_MODE_TILED,
  21         TEGRA_BO_TILING_MODE_BLOCK,
  22 };
  23
  24 struct tegra_bo_tiling {
  25         enum tegra_bo_tiling_mode mode;
  26         unsigned long value;
  27 };
  28
  29 struct tegra_bo {
  30         struct drm_gem_object gem;
  31         struct host1x_bo base;
  32         unsigned long flags;
  33         struct sg_table *sgt;
  34         dma_addr_t iova;
  35         void *vaddr;
  36
  37         struct drm_mm_node *mm;
  38         unsigned long num_pages;
  39         struct page **pages;
  40         /* size of IOMMU mapping */
  41         size_t size;
  42
  43         struct tegra_bo_tiling tiling;
  44 };
  45
  46 static inline struct tegra_bo *to_tegra_bo(struct drm_gem_object *gem)
  47 {
  48         return container_of(gem, struct tegra_bo, gem);
  49 }
  50
  51 static inline struct tegra_bo *host1x_to_tegra_bo(struct host1x_bo *bo)
  52 {
  53         return container_of(bo, struct tegra_bo, base);
  54 }
  55
  56 struct tegra_bo *tegra_bo_create(struct drm_device *drm, size_t size,
  57                                  unsigned long flags);
  58 struct tegra_bo *tegra_bo_create_with_handle(struct drm_file *file,
  59                                              struct drm_device *drm,
  60                                              size_t size,
  61                                              unsigned long flags,
  62                                              u32 *handle);
  63 void tegra_bo_free_object(struct drm_gem_object *gem);
  64 int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm,
  65                          struct drm_mode_create_dumb *args);
  66
  67 extern const struct vm_operations_struct tegra_bo_vm_ops;
  68
  69 int __tegra_gem_mmap(struct drm_gem_object *gem, struct vm_area_struct *vma);
  70 int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma);
  71
  72 struct dma_buf *tegra_gem_prime_export(struct drm_gem_object *gem,
  73                                        int flags);
  74 struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm,
  75                                               struct dma_buf *buf);
  76
  77 #endif