1 /* 2 * drivers/staging/android/uapi/ion.h 3 * 4 * Copyright (C) 2011 Google, Inc. 5 * 6 * This software is licensed under the terms of the GNU General Public 7 * License version 2, as published by the Free Software Foundation, and 8 * may be copied, distributed, and modified under those terms. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 */ 16 17 #ifndef _UAPI_LINUX_ION_TEST_H 18 #define _UAPI_LINUX_ION_TEST_H 19 20 #include <linux/ioctl.h> 21 #include <linux/types.h> 22 23 /** 24 * struct ion_test_rw_data - metadata passed to the kernel to read handle 25 * @ptr: a pointer to an area at least as large as size 26 * @offset: offset into the ion buffer to start reading 27 * @size: size to read or write 28 * @write: 1 to write, 0 to read 29 */ 30 struct ion_test_rw_data { 31 __u64 ptr; 32 __u64 offset; 33 __u64 size; 34 int write; 35 int __padding; 36 }; 37 38 #define ION_IOC_MAGIC 'I' 39 40 /** 41 * DOC: ION_IOC_TEST_SET_DMA_BUF - attach a dma buf to the test driver 42 * 43 * Attaches a dma buf fd to the test driver. Passing a second fd or -1 will 44 * release the first fd. 45 */ 46 #define ION_IOC_TEST_SET_FD \ 47 _IO(ION_IOC_MAGIC, 0xf0) 48 49 /** 50 * DOC: ION_IOC_TEST_DMA_MAPPING - read or write memory from a handle as DMA 51 * 52 * Reads or writes the memory from a handle using an uncached mapping. Can be 53 * used by unit tests to emulate a DMA engine as close as possible. Only 54 * expected to be used for debugging and testing, may not always be available. 55 */ 56 #define ION_IOC_TEST_DMA_MAPPING \ 57 _IOW(ION_IOC_MAGIC, 0xf1, struct ion_test_rw_data) 58 59 /** 60 * DOC: ION_IOC_TEST_KERNEL_MAPPING - read or write memory from a handle 61 * 62 * Reads or writes the memory from a handle using a kernel mapping. Can be 63 * used by unit tests to test heap map_kernel functions. Only expected to be 64 * used for debugging and testing, may not always be available. 65 */ 66 #define ION_IOC_TEST_KERNEL_MAPPING \ 67 _IOW(ION_IOC_MAGIC, 0xf2, struct ion_test_rw_data) 68 69 70 #endif /* _UAPI_LINUX_ION_H */ 71
