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 /* 40 * Object chunk size currently mapped onto physical memory 41 */ 42 size_t heap_rss_size; 43 44 bool noexec :1; 45 bool is_heap :1; 46 }; 47 48 struct panfrost_gem_mapping { 49 struct list_head node; 50 struct kref refcount; 51 struct panfrost_gem_object *obj; 52 struct drm_mm_node mmnode; 53 struct panfrost_mmu *mmu; 54 bool active :1; 55 }; 56 57 static inline to_panfrost_bo(struct drm_gem_object * obj)58 struct panfrost_gem_object *to_panfrost_bo(struct drm_gem_object *obj) 59 { 60 return container_of(to_drm_gem_shmem_obj(obj), struct panfrost_gem_object, base); 61 } 62 63 static inline struct panfrost_gem_mapping * drm_mm_node_to_panfrost_mapping(struct drm_mm_node * node)64 drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node) 65 { 66 return container_of(node, struct panfrost_gem_mapping, mmnode); 67 } 68 69 struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size); 70 71 struct drm_gem_object * 72 panfrost_gem_prime_import_sg_table(struct drm_device *dev, 73 struct dma_buf_attachment *attach, 74 struct sg_table *sgt); 75 76 struct panfrost_gem_object * 77 panfrost_gem_create(struct drm_device *dev, size_t size, u32 flags); 78 79 int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv); 80 void panfrost_gem_close(struct drm_gem_object *obj, 81 struct drm_file *file_priv); 82 83 struct panfrost_gem_mapping * 84 panfrost_gem_mapping_get(struct panfrost_gem_object *bo, 85 struct panfrost_file_priv *priv); 86 void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping); 87 void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo); 88 89 int panfrost_gem_shrinker_init(struct drm_device *dev); 90 void panfrost_gem_shrinker_cleanup(struct drm_device *dev); 91 92 #endif /* __PANFROST_GEM_H__ */ 93