drivers/gpu/drm/panfrost/panfrost_gem.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
   3
   4 #ifndef __PANFROST_GEM_H__
   5 #define __PANFROST_GEM_H__
   6
   7 #include <drm/drm_gem_shmem_helper.h>
   8 #include <drm/drm_mm.h>
   9
  10 struct panfrost_mmu;
  11
  12 struct panfrost_gem_object {
  13         struct drm_gem_shmem_object base;
  14         struct sg_table *sgts;
  15
  16         /*
  17          * Use a list for now. If searching a mapping ever becomes the
  18          * bottleneck, we should consider using an RB-tree, or even better,
  19          * let the core store drm_gem_object_mapping entries (where we
  20          * could place driver specific data) instead of drm_gem_object ones
  21          * in its drm_file->object_idr table.
  22          *
  23          * struct drm_gem_object_mapping {
  24          *      struct drm_gem_object *obj;
  25          *      void *driver_priv;
  26          * };
  27          */
  28         struct {
  29                 struct list_head list;
  30                 struct mutex lock;
  31         } mappings;
  32
  33         /*
  34          * Count the number of jobs referencing this BO so we don't let the
  35          * shrinker reclaim this object prematurely.
  36          */
  37         atomic_t gpu_usecount;
  38
  39         bool noexec             :1;
  40         bool is_heap            :1;
  41 };
  42
  43 struct panfrost_gem_mapping {
  44         struct list_head node;
  45         struct kref refcount;
  46         struct panfrost_gem_object *obj;
  47         struct drm_mm_node mmnode;
  48         struct panfrost_mmu *mmu;
  49         bool active             :1;
  50 };
  51
  52 static inline
  53 struct  panfrost_gem_object *to_panfrost_bo(struct drm_gem_object *obj)
  54 {
  55         return container_of(to_drm_gem_shmem_obj(obj), struct panfrost_gem_object, base);
  56 }
  57
  58 static inline struct panfrost_gem_mapping *
  59 drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node)
  60 {
  61         return container_of(node, struct panfrost_gem_mapping, mmnode);
  62 }
  63
  64 struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size);
  65
  66 struct drm_gem_object *
  67 panfrost_gem_prime_import_sg_table(struct drm_device *dev,
  68                                    struct dma_buf_attachment *attach,
  69                                    struct sg_table *sgt);
  70
  71 struct panfrost_gem_object *
  72 panfrost_gem_create_with_handle(struct drm_file *file_priv,
  73                                 struct drm_device *dev, size_t size,
  74                                 u32 flags,
  75                                 uint32_t *handle);
  76
  77 int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv);
  78 void panfrost_gem_close(struct drm_gem_object *obj,
  79                         struct drm_file *file_priv);
  80
  81 struct panfrost_gem_mapping *
  82 panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
  83                          struct panfrost_file_priv *priv);
  84 void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
  85 void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo);
  86
  87 void panfrost_gem_shrinker_init(struct drm_device *dev);
  88 void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
  89
  90 #endif /* __PANFROST_GEM_H__ */