1 /** 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _LINUX_ASHMEM_H 18 #define _LINUX_ASHMEM_H 19 #include <linux/limits.h> 20 #include <linux/ioctl.h> 21 #define ASHMEM_NAME_LEN 256 22 #define ASHMEM_NAME_DEF "dev/ashmem" 23 /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */ 24 #define ASHMEM_NOT_PURGED 0 25 #define ASHMEM_WAS_PURGED 1 26 /* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */ 27 #define ASHMEM_IS_UNPINNED 0 28 #define ASHMEM_IS_PINNED 1 29 struct ashmem_pin { 30 __u32 offset; /* offset into region, in bytes, page-aligned */ 31 __u32 len; /* length forward from offset, in bytes, page-aligned */ 32 }; 33 #define __ASHMEMIOC 0x77 34 #define ASHMEM_SET_NAME _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN]) 35 #define ASHMEM_GET_NAME _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN]) 36 #define ASHMEM_SET_SIZE _IOW(__ASHMEMIOC, 3, size_t) 37 #define ASHMEM_GET_SIZE _IO(__ASHMEMIOC, 4) 38 #define ASHMEM_SET_PROT_MASK _IOW(__ASHMEMIOC, 5, unsigned long) 39 #define ASHMEM_GET_PROT_MASK _IO(__ASHMEMIOC, 6) 40 #define ASHMEM_PIN _IOW(__ASHMEMIOC, 7, struct ashmem_pin) 41 #define ASHMEM_UNPIN _IOW(__ASHMEMIOC, 8, struct ashmem_pin) 42 #define ASHMEM_GET_PIN_STATUS _IO(__ASHMEMIOC, 9) 43 #define ASHMEM_PURGE_ALL_CACHES _IO(__ASHMEMIOC, 10) 44 #define ASHMEM_CACHE_FLUSH_RANGE _IO(__ASHMEMIOC, 11) 45 #define ASHMEM_CACHE_CLEAN_RANGE _IO(__ASHMEMIOC, 12) 46 #define ASHMEM_CACHE_INV_RANGE _IO(__ASHMEMIOC, 13) 47 int get_ashmem_file(int fd, struct file **filp, struct file **vm_file, 48 unsigned long *len); 49 void put_ashmem_file(struct file *file); 50 #endif /* _LINUX_ASHMEM_H */ 51