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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/dma-heap.h
1 /* SPDX-License-Identifier: GPL-2.0 */
3 * DMABUF Heaps Allocation Infrastructure
5 * Copyright (C) 2011 Google, Inc.
6 * Copyright (C) 2019 Linaro Ltd.
12 #include <linux/cdev.h>
13 #include <linux/types.h>
18 * struct dma_heap_ops - ops to operate on a given heap
19 * @allocate: allocate dmabuf and return struct dma_buf ptr
21 * allocate returns dmabuf on success, ERR_PTR(-errno) on error.
24 struct dma_buf
*(*allocate
)(struct dma_heap
*heap
,
26 unsigned long fd_flags
,
27 unsigned long heap_flags
);
31 * struct dma_heap_export_info - information needed to export a new dmabuf heap
32 * @name: used for debugging/device-node name
33 * @ops: ops struct for this heap
34 * @priv: heap exporter private data
36 * Information needed to export a new dmabuf heap.
38 struct dma_heap_export_info
{
40 const struct dma_heap_ops
*ops
;
45 * dma_heap_get_drvdata() - get per-heap driver data
46 * @heap: DMA-Heap to retrieve private data for
49 * The per-heap data for the heap.
51 void *dma_heap_get_drvdata(struct dma_heap
*heap
);
54 * dma_heap_get_name() - get heap name
55 * @heap: DMA-Heap to retrieve private data for
58 * The char* for the heap name.
60 const char *dma_heap_get_name(struct dma_heap
*heap
);
63 * dma_heap_add - adds a heap to dmabuf heaps
64 * @exp_info: information needed to register this heap
66 struct dma_heap
*dma_heap_add(const struct dma_heap_export_info
*exp_info
);
68 #endif /* _DMA_HEAPS_H */