71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
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/*
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* drivers/staging/android/uapi/ion.h
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*
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* Copyright (C) 2011 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _UAPI_LINUX_ION_TEST_H
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#define _UAPI_LINUX_ION_TEST_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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/**
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* struct ion_test_rw_data - metadata passed to the kernel to read handle
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* @ptr: a pointer to an area at least as large as size
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* @offset: offset into the ion buffer to start reading
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* @size: size to read or write
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* @write: 1 to write, 0 to read
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*/
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struct ion_test_rw_data {
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__u64 ptr;
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__u64 offset;
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__u64 size;
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int write;
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int __padding;
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};
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#define ION_IOC_MAGIC 'I'
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/**
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* DOC: ION_IOC_TEST_SET_DMA_BUF - attach a dma buf to the test driver
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*
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* Attaches a dma buf fd to the test driver. Passing a second fd or -1 will
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* release the first fd.
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*/
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#define ION_IOC_TEST_SET_FD \
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_IO(ION_IOC_MAGIC, 0xf0)
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/**
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* DOC: ION_IOC_TEST_DMA_MAPPING - read or write memory from a handle as DMA
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*
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* Reads or writes the memory from a handle using an uncached mapping. Can be
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* used by unit tests to emulate a DMA engine as close as possible. Only
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* expected to be used for debugging and testing, may not always be available.
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*/
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#define ION_IOC_TEST_DMA_MAPPING \
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_IOW(ION_IOC_MAGIC, 0xf1, struct ion_test_rw_data)
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/**
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* DOC: ION_IOC_TEST_KERNEL_MAPPING - read or write memory from a handle
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*
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* Reads or writes the memory from a handle using a kernel mapping. Can be
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* used by unit tests to test heap map_kernel functions. Only expected to be
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* used for debugging and testing, may not always be available.
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*/
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#define ION_IOC_TEST_KERNEL_MAPPING \
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_IOW(ION_IOC_MAGIC, 0xf2, struct ion_test_rw_data)
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#endif /* _UAPI_LINUX_ION_H */
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