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c30e83b813
Add get_ashmem_file and put_ashmem_file routines in ashmem driver to get and return file references to ashmem file from within the kernel. Change-Id: Ifbb54f7c1aab90f6d656a10a3c40ca2b65ceb89a Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/*
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* include/linux/ashmem.h
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*
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* Copyright 2008 Google Inc.
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* Author: Robert Love
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*
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* This file is dual licensed. It may be redistributed and/or modified
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* under the terms of the Apache 2.0 License OR version 2 of the GNU
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* General Public License.
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*/
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#ifndef _LINUX_ASHMEM_H
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#define _LINUX_ASHMEM_H
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#include <linux/limits.h>
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#include <linux/ioctl.h>
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#define ASHMEM_NAME_LEN 256
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#define ASHMEM_NAME_DEF "dev/ashmem"
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/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
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#define ASHMEM_NOT_PURGED 0
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#define ASHMEM_WAS_PURGED 1
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/* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */
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#define ASHMEM_IS_UNPINNED 0
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#define ASHMEM_IS_PINNED 1
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struct ashmem_pin {
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__u32 offset; /* offset into region, in bytes, page-aligned */
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__u32 len; /* length forward from offset, in bytes, page-aligned */
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};
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#define __ASHMEMIOC 0x77
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#define ASHMEM_SET_NAME _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN])
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#define ASHMEM_GET_NAME _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN])
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#define ASHMEM_SET_SIZE _IOW(__ASHMEMIOC, 3, size_t)
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#define ASHMEM_GET_SIZE _IO(__ASHMEMIOC, 4)
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#define ASHMEM_SET_PROT_MASK _IOW(__ASHMEMIOC, 5, unsigned long)
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#define ASHMEM_GET_PROT_MASK _IO(__ASHMEMIOC, 6)
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#define ASHMEM_PIN _IOW(__ASHMEMIOC, 7, struct ashmem_pin)
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#define ASHMEM_UNPIN _IOW(__ASHMEMIOC, 8, struct ashmem_pin)
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#define ASHMEM_GET_PIN_STATUS _IO(__ASHMEMIOC, 9)
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#define ASHMEM_PURGE_ALL_CACHES _IO(__ASHMEMIOC, 10)
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#define ASHMEM_CACHE_FLUSH_RANGE _IO(__ASHMEMIOC, 11)
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#define ASHMEM_CACHE_CLEAN_RANGE _IO(__ASHMEMIOC, 12)
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#define ASHMEM_CACHE_INV_RANGE _IO(__ASHMEMIOC, 13)
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int get_ashmem_file(int fd, struct file **filp, struct file **vm_file,
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unsigned long *len);
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void put_ashmem_file(struct file *file);
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#endif /* _LINUX_ASHMEM_H */
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