1 /*
2 * Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.
3
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above
10 * copyright notice, this list of conditions and the following
11 * disclaimer in the documentation and/or other materials provided
12 * with the distribution.
13 * * Neither the name of The Linux Foundation nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #define DEBUG 0
31 #define ATRACE_TAG (ATRACE_TAG_GRAPHICS | ATRACE_TAG_HAL)
32 #include <sys/ioctl.h>
33 #include <sys/mman.h>
34 #include <stdlib.h>
35 #include <fcntl.h>
36 #include <cutils/log.h>
37 #include <errno.h>
38 #include <utils/Trace.h>
39 #include <cutils/trace.h>
40 #include "gralloc_priv.h"
41 #include "ionalloc.h"
42
43 using gralloc::IonAlloc;
44
45 #define ION_DEVICE "/dev/ion"
46
open_device()47 int IonAlloc::open_device()
48 {
49 if(mIonFd == FD_INIT)
50 mIonFd = open(ION_DEVICE, O_RDONLY);
51
52 if(mIonFd < 0 ) {
53 ALOGE("%s: Failed to open ion device - %s",
54 __FUNCTION__, strerror(errno));
55 mIonFd = FD_INIT;
56 return -errno;
57 }
58 return 0;
59 }
60
close_device()61 void IonAlloc::close_device()
62 {
63 if(mIonFd >= 0)
64 close(mIonFd);
65 mIonFd = FD_INIT;
66 }
67
alloc_buffer(alloc_data & data)68 int IonAlloc::alloc_buffer(alloc_data& data)
69 {
70 ATRACE_CALL();
71 Locker::Autolock _l(mLock);
72 int err = 0;
73 struct ion_handle_data handle_data;
74 struct ion_fd_data fd_data;
75 struct ion_allocation_data ionAllocData;
76 void *base = 0;
77
78 ionAllocData.len = data.size;
79 ionAllocData.align = data.align;
80 ionAllocData.heap_id_mask = data.heapId;
81 ionAllocData.flags = data.flags;
82 ionAllocData.flags |= data.uncached ? 0 : ION_FLAG_CACHED;
83 err = open_device();
84 if (err)
85 return err;
86 if(ioctl(mIonFd, ION_IOC_ALLOC, &ionAllocData)) {
87 err = -errno;
88 ALOGE("ION_IOC_ALLOC failed with error - %s", strerror(errno));
89 return err;
90 }
91
92 fd_data.handle = ionAllocData.handle;
93 handle_data.handle = ionAllocData.handle;
94 if(ioctl(mIonFd, ION_IOC_MAP, &fd_data)) {
95 err = -errno;
96 ALOGE("%s: ION_IOC_MAP failed with error - %s",
97 __FUNCTION__, strerror(errno));
98 ioctl(mIonFd, ION_IOC_FREE, &handle_data);
99 return err;
100 }
101
102 if(!(data.flags & ION_SECURE)) {
103 base = mmap(0, ionAllocData.len, PROT_READ|PROT_WRITE,
104 MAP_SHARED, fd_data.fd, 0);
105 if(base == MAP_FAILED) {
106 err = -errno;
107 ALOGE("%s: Failed to map the allocated memory: %s",
108 __FUNCTION__, strerror(errno));
109 ioctl(mIonFd, ION_IOC_FREE, &handle_data);
110 return err;
111 }
112 }
113
114 data.base = base;
115 data.fd = fd_data.fd;
116 ioctl(mIonFd, ION_IOC_FREE, &handle_data);
117 ALOGD_IF(DEBUG, "ion: Allocated buffer base:%p size:%zu fd:%d",
118 data.base, ionAllocData.len, data.fd);
119 return 0;
120 }
121
122
free_buffer(void * base,unsigned int size,unsigned int offset,int fd)123 int IonAlloc::free_buffer(void* base, unsigned int size, unsigned int offset,
124 int fd)
125 {
126 ATRACE_CALL();
127 Locker::Autolock _l(mLock);
128 ALOGD_IF(DEBUG, "ion: Freeing buffer base:%p size:%u fd:%d",
129 base, size, fd);
130 int err = 0;
131 err = open_device();
132 if (err)
133 return err;
134
135 if(base)
136 err = unmap_buffer(base, size, offset);
137 close(fd);
138 return err;
139 }
140
map_buffer(void ** pBase,unsigned int size,unsigned int offset,int fd)141 int IonAlloc::map_buffer(void **pBase, unsigned int size, unsigned int offset,
142 int fd)
143 {
144 ATRACE_CALL();
145 int err = 0;
146 void *base = 0;
147 // It is a (quirky) requirement of ION to have opened the
148 // ion fd in the process that is doing the mapping
149 err = open_device();
150 if (err)
151 return err;
152
153 base = mmap(0, size, PROT_READ| PROT_WRITE,
154 MAP_SHARED, fd, 0);
155 *pBase = base;
156 if(base == MAP_FAILED) {
157 err = -errno;
158 ALOGE("ion: Failed to map memory in the client: %s",
159 strerror(errno));
160 } else {
161 ALOGD_IF(DEBUG, "ion: Mapped buffer base:%p size:%u offset:%u fd:%d",
162 base, size, offset, fd);
163 }
164 return err;
165 }
166
unmap_buffer(void * base,unsigned int size,unsigned int)167 int IonAlloc::unmap_buffer(void *base, unsigned int size,
168 unsigned int /*offset*/)
169 {
170 ATRACE_CALL();
171 ALOGD_IF(DEBUG, "ion: Unmapping buffer base:%p size:%u", base, size);
172 int err = 0;
173 if(munmap(base, size)) {
174 err = -errno;
175 ALOGE("ion: Failed to unmap memory at %p : %s",
176 base, strerror(errno));
177 }
178 return err;
179
180 }
clean_buffer(void * base,unsigned int size,unsigned int offset,int fd,int op)181 int IonAlloc::clean_buffer(void *base, unsigned int size, unsigned int offset,
182 int fd, int op)
183 {
184 ATRACE_CALL();
185 ATRACE_INT("operation id", op);
186 struct ion_flush_data flush_data;
187 struct ion_fd_data fd_data;
188 struct ion_handle_data handle_data;
189 int err = 0;
190
191 err = open_device();
192 if (err)
193 return err;
194
195 fd_data.fd = fd;
196 if (ioctl(mIonFd, ION_IOC_IMPORT, &fd_data)) {
197 err = -errno;
198 ALOGE("%s: ION_IOC_IMPORT failed with error - %s",
199 __FUNCTION__, strerror(errno));
200 return err;
201 }
202
203 handle_data.handle = fd_data.handle;
204 flush_data.handle = fd_data.handle;
205 flush_data.vaddr = base;
206 // offset and length are unsigned int
207 flush_data.offset = offset;
208 flush_data.length = size;
209
210 struct ion_custom_data d;
211 switch(op) {
212 case CACHE_CLEAN:
213 d.cmd = ION_IOC_CLEAN_CACHES;
214 break;
215 case CACHE_INVALIDATE:
216 d.cmd = ION_IOC_INV_CACHES;
217 break;
218 case CACHE_CLEAN_AND_INVALIDATE:
219 default:
220 d.cmd = ION_IOC_CLEAN_INV_CACHES;
221 }
222
223 d.arg = (unsigned long int)&flush_data;
224
225 if(ioctl(mIonFd, ION_IOC_CUSTOM, &d)) {
226 err = -errno;
227 ALOGE("%s: ION_IOC_CLEAN_INV_CACHES failed with error - %s",
228
229 __FUNCTION__, strerror(errno));
230 ioctl(mIonFd, ION_IOC_FREE, &handle_data);
231 return err;
232 }
233 ioctl(mIonFd, ION_IOC_FREE, &handle_data);
234 return 0;
235 }
236
237