Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Samsung Electronics Co., Ltd. |
| 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 | #include <ion.h> |
| 18 | #include <fcntl.h> |
| 19 | #include <sys/mman.h> |
| 20 | #include <sys/ioctl.h> |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 21 | #include <cutils/log.h> |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 22 | |
| 23 | typedef unsigned long ion_handle; |
| 24 | |
| 25 | struct ion_allocation_data { |
| 26 | size_t len; |
| 27 | size_t align; |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 28 | unsigned int heap_mask; |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 29 | unsigned int flags; |
| 30 | ion_handle handle; |
| 31 | }; |
| 32 | |
| 33 | struct ion_fd_data { |
| 34 | ion_handle handle; |
| 35 | int fd; |
| 36 | }; |
| 37 | |
| 38 | struct ion_handle_data { |
| 39 | ion_handle handle; |
| 40 | }; |
| 41 | |
| 42 | struct ion_custom_data { |
| 43 | unsigned int cmd; |
| 44 | unsigned long arg; |
| 45 | }; |
| 46 | |
| 47 | #define ION_IOC_MAGIC 'I' |
| 48 | #define ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_allocation_data) |
| 49 | #define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data) |
| 50 | #define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data) |
| 51 | #define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data) |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 52 | #define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, struct ion_fd_data) |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 53 | #define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data) |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 54 | #define ION_IOC_SYNC _IOWR(ION_IOC_MAGIC, 7, struct ion_fd_data) |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 55 | |
| 56 | struct ion_msync_data { |
| 57 | long flags; |
| 58 | ion_buffer buf; |
| 59 | size_t size; |
| 60 | off_t offset; |
| 61 | }; |
| 62 | |
| 63 | enum ION_EXYNOS_CUSTOM_CMD { |
| 64 | ION_EXYNOS_CUSTOM_MSYNC |
| 65 | }; |
| 66 | |
| 67 | ion_client ion_client_create(void) |
| 68 | { |
| 69 | return open("/dev/ion", O_RDWR); |
| 70 | } |
| 71 | |
| 72 | void ion_client_destroy(ion_client client) |
| 73 | { |
| 74 | close(client); |
| 75 | } |
| 76 | |
| 77 | ion_buffer ion_alloc(ion_client client, size_t len, size_t align, |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 78 | unsigned int heap_mask, unsigned int flags) |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 79 | { |
| 80 | int ret; |
| 81 | struct ion_handle_data arg_free; |
| 82 | struct ion_fd_data arg_share; |
| 83 | struct ion_allocation_data arg_alloc; |
| 84 | |
| 85 | arg_alloc.len = len; |
| 86 | arg_alloc.align = align; |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 87 | arg_alloc.heap_mask = heap_mask; |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 88 | arg_alloc.flags = flags; |
| 89 | |
| 90 | ret = ioctl(client, ION_IOC_ALLOC, &arg_alloc); |
| 91 | if (ret < 0) |
| 92 | return ret; |
| 93 | |
| 94 | arg_share.handle = arg_alloc.handle; |
| 95 | ret = ioctl(client, ION_IOC_SHARE, &arg_share); |
| 96 | |
| 97 | arg_free.handle = arg_alloc.handle; |
| 98 | ioctl(client, ION_IOC_FREE, &arg_free); |
| 99 | |
| 100 | if (ret < 0) |
| 101 | return ret; |
| 102 | |
| 103 | return arg_share.fd; |
| 104 | } |
| 105 | |
| 106 | void ion_free(ion_buffer buffer) |
| 107 | { |
| 108 | close(buffer); |
| 109 | } |
| 110 | |
| 111 | void *ion_map(ion_buffer buffer, size_t len, off_t offset) |
| 112 | { |
| 113 | return mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, |
| 114 | buffer, offset); |
| 115 | } |
| 116 | |
| 117 | int ion_unmap(void *addr, size_t len) |
| 118 | { |
| 119 | return munmap(addr, len); |
| 120 | } |
| 121 | |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 122 | int ion_sync(ion_client client, ion_buffer buffer) |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 123 | { |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 124 | struct ion_fd_data data; |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 125 | |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 126 | data.fd = buffer; |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 127 | |
Rebecca Schultz Zavin | eb42d13 | 2012-06-11 16:53:41 -0700 | [diff] [blame] | 128 | return ioctl(client, ION_IOC_SYNC, &data); |
Dima Zavin | fc4b5d5 | 2012-02-29 16:40:35 -0800 | [diff] [blame] | 129 | } |