blob: a7b22b839dc1228d8d08864acf3c34f3b3ae78b9 [file] [log] [blame]
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -08001/*
2 * ion.c
3 *
4 * Memory Allocator functions for ion
5 *
6 * Copyright 2011 Google, Inc
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20#define LOG_TAG "ion"
21
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080022#include <errno.h>
23#include <fcntl.h>
Mark Salyzyn66ce3e02016-09-28 10:07:20 -070024#include <linux/ion.h>
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080025#include <stdio.h>
Elliott Hughesa744b052015-01-28 11:37:57 -080026#include <string.h>
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080027#include <sys/ioctl.h>
28#include <sys/mman.h>
29#include <sys/types.h>
Mark Salyzyncfd5b082016-10-17 14:28:00 -070030#include <unistd.h>
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080031
Mark Salyzyn66ce3e02016-09-28 10:07:20 -070032#include <android/log.h>
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080033#include <ion/ion.h>
34
35int ion_open()
36{
Nick Kralevich6b694a72016-11-29 15:20:18 -080037 int fd = open("/dev/ion", O_RDONLY | O_CLOEXEC);
Colin Cross92d7ca62013-11-08 19:04:18 -080038 if (fd < 0)
39 ALOGE("open /dev/ion failed!\n");
40 return fd;
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080041}
42
43int ion_close(int fd)
44{
Colin Crossaab47b22013-12-18 15:17:21 -080045 int ret = close(fd);
46 if (ret < 0)
47 return -errno;
48 return ret;
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080049}
50
51static int ion_ioctl(int fd, int req, void *arg)
52{
Colin Cross92d7ca62013-11-08 19:04:18 -080053 int ret = ioctl(fd, req, arg);
54 if (ret < 0) {
55 ALOGE("ioctl %x failed with code %d: %s\n", req,
56 ret, strerror(errno));
57 return -errno;
58 }
59 return ret;
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080060}
61
Rebecca Schultz Zavina50fd552012-06-11 15:12:37 -070062int ion_alloc(int fd, size_t len, size_t align, unsigned int heap_mask,
Colin Cross92d7ca62013-11-08 19:04:18 -080063 unsigned int flags, ion_user_handle_t *handle)
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080064{
Colin Cross92d7ca62013-11-08 19:04:18 -080065 int ret;
66 struct ion_allocation_data data = {
67 .len = len,
68 .align = align,
69 .heap_id_mask = heap_mask,
70 .flags = flags,
71 };
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080072
Colin Cross74963182013-11-08 19:07:38 -080073 if (handle == NULL)
74 return -EINVAL;
75
Colin Cross92d7ca62013-11-08 19:04:18 -080076 ret = ion_ioctl(fd, ION_IOC_ALLOC, &data);
77 if (ret < 0)
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080078 return ret;
Colin Cross92d7ca62013-11-08 19:04:18 -080079 *handle = data.handle;
80 return ret;
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080081}
82
Rom Lemarchand969eac82013-10-21 15:19:56 -070083int ion_free(int fd, ion_user_handle_t handle)
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080084{
Colin Cross92d7ca62013-11-08 19:04:18 -080085 struct ion_handle_data data = {
86 .handle = handle,
87 };
88 return ion_ioctl(fd, ION_IOC_FREE, &data);
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080089}
90
Rom Lemarchand969eac82013-10-21 15:19:56 -070091int ion_map(int fd, ion_user_handle_t handle, size_t length, int prot,
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080092 int flags, off_t offset, unsigned char **ptr, int *map_fd)
93{
Colin Cross74963182013-11-08 19:07:38 -080094 int ret;
Rom Lemarchand5cdcdce2014-10-27 16:42:10 -070095 unsigned char *tmp_ptr;
Colin Cross92d7ca62013-11-08 19:04:18 -080096 struct ion_fd_data data = {
97 .handle = handle,
98 };
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -080099
Colin Cross74963182013-11-08 19:07:38 -0800100 if (map_fd == NULL)
101 return -EINVAL;
102 if (ptr == NULL)
103 return -EINVAL;
104
105 ret = ion_ioctl(fd, ION_IOC_MAP, &data);
Colin Cross92d7ca62013-11-08 19:04:18 -0800106 if (ret < 0)
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800107 return ret;
Rom Lemarchand5cdcdce2014-10-27 16:42:10 -0700108 if (data.fd < 0) {
Colin Cross92d7ca62013-11-08 19:04:18 -0800109 ALOGE("map ioctl returned negative fd\n");
110 return -EINVAL;
111 }
Rom Lemarchand5cdcdce2014-10-27 16:42:10 -0700112 tmp_ptr = mmap(NULL, length, prot, flags, data.fd, offset);
113 if (tmp_ptr == MAP_FAILED) {
Colin Cross92d7ca62013-11-08 19:04:18 -0800114 ALOGE("mmap failed: %s\n", strerror(errno));
115 return -errno;
116 }
Rom Lemarchand5cdcdce2014-10-27 16:42:10 -0700117 *map_fd = data.fd;
118 *ptr = tmp_ptr;
Colin Cross92d7ca62013-11-08 19:04:18 -0800119 return ret;
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800120}
121
Rom Lemarchand969eac82013-10-21 15:19:56 -0700122int ion_share(int fd, ion_user_handle_t handle, int *share_fd)
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800123{
Colin Cross74963182013-11-08 19:07:38 -0800124 int ret;
Colin Cross92d7ca62013-11-08 19:04:18 -0800125 struct ion_fd_data data = {
126 .handle = handle,
127 };
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800128
Colin Cross74963182013-11-08 19:07:38 -0800129 if (share_fd == NULL)
130 return -EINVAL;
131
132 ret = ion_ioctl(fd, ION_IOC_SHARE, &data);
Colin Cross92d7ca62013-11-08 19:04:18 -0800133 if (ret < 0)
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800134 return ret;
Rom Lemarchand5cdcdce2014-10-27 16:42:10 -0700135 if (data.fd < 0) {
Colin Cross92d7ca62013-11-08 19:04:18 -0800136 ALOGE("share ioctl returned negative fd\n");
137 return -EINVAL;
138 }
Rom Lemarchand5cdcdce2014-10-27 16:42:10 -0700139 *share_fd = data.fd;
Colin Cross92d7ca62013-11-08 19:04:18 -0800140 return ret;
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800141}
142
Rebecca Schultz Zavina50fd552012-06-11 15:12:37 -0700143int ion_alloc_fd(int fd, size_t len, size_t align, unsigned int heap_mask,
Colin Cross92d7ca62013-11-08 19:04:18 -0800144 unsigned int flags, int *handle_fd) {
145 ion_user_handle_t handle;
146 int ret;
Rebecca Schultz Zavina50fd552012-06-11 15:12:37 -0700147
Colin Cross92d7ca62013-11-08 19:04:18 -0800148 ret = ion_alloc(fd, len, align, heap_mask, flags, &handle);
149 if (ret < 0)
150 return ret;
151 ret = ion_share(fd, handle, handle_fd);
152 ion_free(fd, handle);
153 return ret;
Rebecca Schultz Zavina50fd552012-06-11 15:12:37 -0700154}
155
Rom Lemarchand969eac82013-10-21 15:19:56 -0700156int ion_import(int fd, int share_fd, ion_user_handle_t *handle)
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800157{
Colin Cross74963182013-11-08 19:07:38 -0800158 int ret;
Colin Cross92d7ca62013-11-08 19:04:18 -0800159 struct ion_fd_data data = {
160 .fd = share_fd,
161 };
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800162
Colin Cross74963182013-11-08 19:07:38 -0800163 if (handle == NULL)
164 return -EINVAL;
165
166 ret = ion_ioctl(fd, ION_IOC_IMPORT, &data);
Colin Cross92d7ca62013-11-08 19:04:18 -0800167 if (ret < 0)
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800168 return ret;
Colin Cross92d7ca62013-11-08 19:04:18 -0800169 *handle = data.handle;
170 return ret;
Rebecca Schultz Zavinafd91232012-02-22 16:36:55 -0800171}
Rebecca Schultz Zavin3cfcc302012-09-20 09:46:19 -0700172
173int ion_sync_fd(int fd, int handle_fd)
174{
175 struct ion_fd_data data = {
176 .fd = handle_fd,
177 };
178 return ion_ioctl(fd, ION_IOC_SYNC, &data);
179}