drm/panfrost/panfrost_gem.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
0003
0004 #ifndef __PANFROST_GEM_H__
0005 #define __PANFROST_GEM_H__
0006
0007 #include <drm/drm_gem_shmem_helper.h>
0008 #include <drm/drm_mm.h>
0009
0010 struct panfrost_mmu;
0011
0012 struct panfrost_gem_object {
0013     struct drm_gem_shmem_object base;
0014     struct sg_table *sgts;
0015
0016     /*
0017      * Use a list for now. If searching a mapping ever becomes the
0018      * bottleneck, we should consider using an RB-tree, or even better,
0019      * let the core store drm_gem_object_mapping entries (where we
0020      * could place driver specific data) instead of drm_gem_object ones
0021      * in its drm_file->object_idr table.
0022      *
0023      * struct drm_gem_object_mapping {
0024      *  struct drm_gem_object *obj;
0025      *  void *driver_priv;
0026      * };
0027      */
0028     struct {
0029         struct list_head list;
0030         struct mutex lock;
0031     } mappings;
0032
0033     /*
0034      * Count the number of jobs referencing this BO so we don't let the
0035      * shrinker reclaim this object prematurely.
0036      */
0037     atomic_t gpu_usecount;
0038
0039     bool noexec     :1;
0040     bool is_heap        :1;
0041 };
0042
0043 struct panfrost_gem_mapping {
0044     struct list_head node;
0045     struct kref refcount;
0046     struct panfrost_gem_object *obj;
0047     struct drm_mm_node mmnode;
0048     struct panfrost_mmu *mmu;
0049     bool active     :1;
0050 };
0051
0052 static inline
0053 struct  panfrost_gem_object *to_panfrost_bo(struct drm_gem_object *obj)
0054 {
0055     return container_of(to_drm_gem_shmem_obj(obj), struct panfrost_gem_object, base);
0056 }
0057
0058 static inline struct panfrost_gem_mapping *
0059 drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node)
0060 {
0061     return container_of(node, struct panfrost_gem_mapping, mmnode);
0062 }
0063
0064 struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size);
0065
0066 struct drm_gem_object *
0067 panfrost_gem_prime_import_sg_table(struct drm_device *dev,
0068                    struct dma_buf_attachment *attach,
0069                    struct sg_table *sgt);
0070
0071 struct panfrost_gem_object *
0072 panfrost_gem_create_with_handle(struct drm_file *file_priv,
0073                 struct drm_device *dev, size_t size,
0074                 u32 flags,
0075                 uint32_t *handle);
0076
0077 int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv);
0078 void panfrost_gem_close(struct drm_gem_object *obj,
0079             struct drm_file *file_priv);
0080
0081 struct panfrost_gem_mapping *
0082 panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
0083              struct panfrost_file_priv *priv);
0084 void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping);
0085 void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo);
0086
0087 void panfrost_gem_shrinker_init(struct drm_device *dev);
0088 void panfrost_gem_shrinker_cleanup(struct drm_device *dev);
0089
0090 #endif /* __PANFROST_GEM_H__ */