root/drivers/staging/android/uapi/ashmem.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 OR Apache-2.0 */
   2 /*
   3  * drivers/staging/android/uapi/ashmem.h
   4  *
   5  * Copyright 2008 Google Inc.
   6  * Author: Robert Love
   7  */
   8 
   9 #ifndef _UAPI_LINUX_ASHMEM_H
  10 #define _UAPI_LINUX_ASHMEM_H
  11 
  12 #include <linux/ioctl.h>
  13 #include <linux/types.h>
  14 
  15 #define ASHMEM_NAME_LEN         256
  16 
  17 #define ASHMEM_NAME_DEF         "dev/ashmem"
  18 
  19 /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
  20 #define ASHMEM_NOT_PURGED       0
  21 #define ASHMEM_WAS_PURGED       1
  22 
  23 /* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */
  24 #define ASHMEM_IS_UNPINNED      0
  25 #define ASHMEM_IS_PINNED        1
  26 
  27 struct ashmem_pin {
  28         __u32 offset;   /* offset into region, in bytes, page-aligned */
  29         __u32 len;      /* length forward from offset, in bytes, page-aligned */
  30 };
  31 
  32 #define __ASHMEMIOC             0x77
  33 
  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 
  45 #endif  /* _UAPI_LINUX_ASHMEM_H */