/* SPDX-License-Identifier: GPL-2.0 */ /* * ION Memory Allocator - Internal header * * Copyright (C) 2019 Google, Inc. */ #ifndef _ION_PRIVATE_H #define _ION_PRIVATE_H #include #include #include #include #include #include #include #include #include /** * struct ion_device - the metadata of the ion device node * @dev: the actual misc device * @lock: rwsem protecting the tree of heaps, heap_bitmap and * clients * @heap_ids: bitmap of register heap ids */ struct ion_device { struct miscdevice dev; struct rw_semaphore lock; DECLARE_BITMAP(heap_ids, ION_NUM_MAX_HEAPS); struct plist_head heaps; struct dentry *debug_root; int heap_cnt; }; /* ion_buffer manipulators */ extern struct ion_buffer *ion_buffer_alloc(struct ion_device *dev, size_t len, unsigned int heap_id_mask, unsigned int flags); extern void ion_buffer_release(struct ion_buffer *buffer); extern int ion_buffer_destroy(struct ion_device *dev, struct ion_buffer *buffer); extern void *ion_buffer_kmap_get(struct ion_buffer *buffer); extern void ion_buffer_kmap_put(struct ion_buffer *buffer); /* ion dmabuf allocator */ extern struct dma_buf *ion_dmabuf_alloc(struct ion_device *dev, size_t len, unsigned int heap_id_mask, unsigned int flags); extern int ion_free(struct ion_buffer *buffer); /* ion heap helpers */ extern int ion_heap_cleanup(struct ion_heap *heap); u64 ion_get_total_heap_bytes(void); #endif /* _ION_PRIVATE_H */