/* SPDX-License-Identifier: GPL-2.0 */ /* * DMABUF Heaps Allocation Infrastructure * * Copyright (C) 2011 Google, Inc. * Copyright (C) 2019 Linaro Ltd. */ #ifndef _DMA_HEAPS_H #define _DMA_HEAPS_H #include <linux/cdev.h> #include <linux/types.h> struct dma_heap; /** * struct dma_heap_ops - ops to operate on a given heap * @allocate: allocate dmabuf and return struct dma_buf ptr * * allocate returns dmabuf on success, ERR_PTR(-errno) on error. */ struct dma_heap_ops { struct dma_buf *(*allocate)(struct dma_heap *heap, unsigned long len, unsigned long fd_flags, unsigned long heap_flags); }; /** * struct dma_heap_export_info - information needed to export a new dmabuf heap * @name: used for debugging/device-node name * @ops: ops struct for this heap * @priv: heap exporter private data * * Information needed to export a new dmabuf heap. */ struct dma_heap_export_info { const char *name; const struct dma_heap_ops *ops; void *priv; }; /** * dma_heap_get_drvdata() - get per-heap driver data * @heap: DMA-Heap to retrieve private data for * * Returns: * The per-heap data for the heap. */ void *dma_heap_get_drvdata(struct dma_heap *heap); /** * dma_heap_get_name() - get heap name * @heap: DMA-Heap to retrieve private data for * * Returns: * The char* for the heap name. */ const char *dma_heap_get_name(struct dma_heap *heap); /** * dma_heap_add - adds a heap to dmabuf heaps * @exp_info: information needed to register this heap */ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info); #endif /* _DMA_HEAPS_H */