1 /****************************************************************************
2 ****************************************************************************
3 ***
4 *** This header was automatically generated from a Linux kernel header
5 *** of the same name, to make information necessary for userspace to
6 *** call into the kernel available to libc. It contains only constants,
7 *** structures, and macros generated from the original header, and thus,
8 *** contains no copyrightable information.
9 ***
10 *** To edit the content of this header, modify the corresponding
11 *** source file (e.g. under external/kernel-headers/original/) then
12 *** run bionic/libc/kernel/tools/update_all.py
13 ***
14 *** Any manual change here will be lost the next time this script will
15 *** be run. You've been warned!
16 ***
17 ****************************************************************************
18 ****************************************************************************/
19 #ifndef _UAPI_LINUX_DMABUF_POOL_H
20 #define _UAPI_LINUX_DMABUF_POOL_H
21 #include <linux/ioctl.h>
22 #include <linux/types.h>
23 #include <stddef.h>
24 #define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE)
25 #define DMA_HEAP_VALID_HEAP_FLAGS (0)
26 struct dma_heap_allocation_data {
27 __u64 len;
28 __u32 fd;
29 __u32 fd_flags;
30 __u64 heap_flags;
31 };
32 #define DMA_HEAP_IOC_MAGIC 'H'
33
34 enum dma_heap_flag_owner_id {
35 OWNER_DEFAULT = 0,
36 OWNER_GPU,
37 OWNER_MEDIA_CODEC,
38 COUNT_DMA_HEAP_FLAG_OWNER,
39 };
40
41 #define OWNER_OFFSET_BIT 27 /* 27 bit */
42 #define OWNER_MASK (0xfUL << OWNER_OFFSET_BIT)
43
44 /* Use the 27-30 bits of heap flags as owner_id flag */
set_owner_id_for_heap_flags(__u64 * heap_flags,__u64 owner_id)45 static inline void set_owner_id_for_heap_flags(__u64 *heap_flags, __u64 owner_id)
46 {
47 if (heap_flags == NULL || owner_id >= COUNT_DMA_HEAP_FLAG_OWNER) {
48 return;
49 }
50 *heap_flags |= owner_id << OWNER_OFFSET_BIT;
51 }
52
53 /* To get the binary number of owner_id */
get_owner_id_from_heap_flags(__u64 heap_flags)54 static inline __u64 get_owner_id_from_heap_flags(__u64 heap_flags)
55 {
56 return (heap_flags & OWNER_MASK) >> OWNER_OFFSET_BIT;
57 }
58
59 #define DMA_HEAP_IOCTL_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0x0, struct dma_heap_allocation_data)
60 #endif
61