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__ */ 91