Sumit Semwal | 75f4cc2 | 2017-12-07 23:00:48 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Adapted from 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_NEW_H |
| 18 | #define _UAPI_LINUX_ION_NEW_H |
| 19 | |
| 20 | #include <linux/ioctl.h> |
| 21 | #include <linux/types.h> |
| 22 | |
| 23 | #define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8) |
| 24 | |
| 25 | /** |
| 26 | * DOC: Ion Userspace API |
| 27 | * |
| 28 | * create a client by opening /dev/ion |
| 29 | * most operations handled via following ioctls |
| 30 | * |
| 31 | */ |
| 32 | |
| 33 | /** |
| 34 | * struct ion_new_allocation_data - metadata passed from userspace for allocations |
| 35 | * @len: size of the allocation |
| 36 | * @heap_id_mask: mask of heap ids to allocate from |
| 37 | * @flags: flags passed to heap |
| 38 | * @handle: pointer that will be populated with a cookie to use to |
| 39 | * refer to this allocation |
| 40 | * |
| 41 | * Provided by userspace as an argument to the ioctl - added _new to denote |
| 42 | * this belongs to the new ION interface. |
| 43 | */ |
| 44 | struct ion_new_allocation_data { |
| 45 | __u64 len; |
| 46 | __u32 heap_id_mask; |
| 47 | __u32 flags; |
| 48 | __u32 fd; |
| 49 | __u32 unused; |
| 50 | }; |
| 51 | |
| 52 | #define MAX_HEAP_NAME 32 |
| 53 | |
| 54 | /** |
| 55 | * struct ion_heap_data - data about a heap |
| 56 | * @name - first 32 characters of the heap name |
| 57 | * @type - heap type |
| 58 | * @heap_id - heap id for the heap |
| 59 | */ |
| 60 | struct ion_heap_data { |
| 61 | char name[MAX_HEAP_NAME]; |
| 62 | __u32 type; |
| 63 | __u32 heap_id; |
| 64 | __u32 reserved0; |
| 65 | __u32 reserved1; |
| 66 | __u32 reserved2; |
| 67 | }; |
| 68 | |
| 69 | /** |
| 70 | * struct ion_heap_query - collection of data about all heaps |
| 71 | * @cnt - total number of heaps to be copied |
| 72 | * @heaps - buffer to copy heap data |
| 73 | */ |
| 74 | struct ion_heap_query { |
| 75 | __u32 cnt; /* Total number of heaps to be copied */ |
| 76 | __u32 reserved0; /* align to 64bits */ |
| 77 | __u64 heaps; /* buffer to be populated */ |
| 78 | __u32 reserved1; |
| 79 | __u32 reserved2; |
| 80 | }; |
| 81 | |
| 82 | #define ION_IOC_MAGIC 'I' |
| 83 | |
| 84 | /** |
| 85 | * DOC: ION_IOC_NEW_ALLOC - allocate memory |
| 86 | * |
| 87 | * Takes an ion_allocation_data struct and returns it with the handle field |
| 88 | * populated with the opaque handle for the allocation. |
| 89 | * TODO: This IOCTL will clash by design; however, only one of |
| 90 | * ION_IOC_ALLOC or ION_IOC_NEW_ALLOC paths will be exercised, |
| 91 | * so this should not conflict. |
| 92 | */ |
| 93 | #define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data) |
| 94 | |
| 95 | /** |
| 96 | * DOC: ION_IOC_FREE - free memory |
| 97 | * |
| 98 | * Takes an ion_handle_data struct and frees the handle. |
| 99 | * |
| 100 | * #define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data) |
| 101 | * This will come from the older kernels, so don't redefine here |
| 102 | */ |
| 103 | |
| 104 | /** |
| 105 | * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation |
| 106 | * |
| 107 | * Takes an ion_fd_data struct with the handle field populated with a valid |
| 108 | * opaque handle. Returns the struct with the fd field set to a file |
| 109 | * descriptor open in the current address space. This file descriptor |
| 110 | * can then be passed to another process. The corresponding opaque handle can |
| 111 | * be retrieved via ION_IOC_IMPORT. |
| 112 | * |
| 113 | * #define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data) |
| 114 | * This will come from the older kernels, so don't redefine here |
| 115 | */ |
| 116 | |
| 117 | /** |
| 118 | * DOC: ION_IOC_HEAP_QUERY - information about available heaps |
| 119 | * |
| 120 | * Takes an ion_heap_query structure and populates information about |
| 121 | * available Ion heaps. |
| 122 | */ |
| 123 | #define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query) |
| 124 | |
| 125 | #endif /* _UAPI_LINUX_ION_NEW_H */ |