1 /*
2 * Copyright (C) 2008 The Android Open Source Project
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 <limits.h>
18 #include <errno.h>
19 #include <pthread.h>
20 #include <unistd.h>
21 #include <string.h>
22
23 #include <sys/mman.h>
24 #include <sys/stat.h>
25 #include <sys/types.h>
26
27 #include <cutils/log.h>
28 #include <cutils/atomic.h>
29
30 #include <hardware/hardware.h>
31 #include <hardware/gralloc.h>
32
33 #include "gralloc_priv.h"
34
35 #include <ion/ion.h>
36 #include <linux/ion.h>
37
38 /*****************************************************************************/
39
gralloc_map(gralloc_module_t const * module,buffer_handle_t handle)40 static int gralloc_map(gralloc_module_t const* module, buffer_handle_t handle)
41 {
42 private_handle_t* hnd = (private_handle_t*)handle;
43
44 void* mappedAddress = mmap(0, hnd->size, PROT_READ|PROT_WRITE, MAP_SHARED,
45 hnd->fd, 0);
46 if (mappedAddress == MAP_FAILED) {
47 ALOGE("%s: could not mmap %s", __func__, strerror(errno));
48 return -errno;
49 }
50 ALOGV("%s: base %p %d %d %d %d\n", __func__, mappedAddress, hnd->size,
51 hnd->width, hnd->height, hnd->stride);
52 hnd->base = mappedAddress;
53 return 0;
54 }
55
gralloc_unmap(gralloc_module_t const * module,buffer_handle_t handle)56 static int gralloc_unmap(gralloc_module_t const* module, buffer_handle_t handle)
57 {
58 private_handle_t* hnd = (private_handle_t*)handle;
59
60 if (!hnd->base)
61 return 0;
62
63 if (munmap(hnd->base, hnd->size) < 0) {
64 ALOGE("%s :could not unmap %s %p %d", __func__, strerror(errno),
65 hnd->base, hnd->size);
66 }
67 ALOGV("%s: base %p %d %d %d %d\n", __func__, hnd->base, hnd->size,
68 hnd->width, hnd->height, hnd->stride);
69 hnd->base = 0;
70 return 0;
71 }
72
73 /*****************************************************************************/
74
getIonFd(gralloc_module_t const * module)75 int getIonFd(gralloc_module_t const *module)
76 {
77 private_module_t* m = const_cast<private_module_t*>(reinterpret_cast<const private_module_t*>(module));
78 if (m->ionfd == -1)
79 m->ionfd = ion_open();
80 return m->ionfd;
81 }
82
83 static pthread_mutex_t sMapLock = PTHREAD_MUTEX_INITIALIZER;
84
85 /*****************************************************************************/
86
gralloc_register_buffer(gralloc_module_t const * module,buffer_handle_t handle)87 int gralloc_register_buffer(gralloc_module_t const* module,
88 buffer_handle_t handle)
89 {
90 if (private_handle_t::validate(handle) < 0)
91 return -EINVAL;
92
93 private_handle_t* hnd = (private_handle_t*)handle;
94 ALOGV("%s: base %p %d %d %d %d\n", __func__, hnd->base, hnd->size,
95 hnd->width, hnd->height, hnd->stride);
96
97 int ret;
98 ret = ion_import(getIonFd(module), hnd->fd, &hnd->handle);
99 if (ret)
100 ALOGE("error importing handle %d %x\n", hnd->fd, hnd->format);
101 if (hnd->fd1 >= 0) {
102 ret = ion_import(getIonFd(module), hnd->fd1, &hnd->handle1);
103 if (ret)
104 ALOGE("error importing handle1 %d %x\n", hnd->fd1, hnd->format);
105 }
106 if (hnd->fd2 >= 0) {
107 ret = ion_import(getIonFd(module), hnd->fd2, &hnd->handle2);
108 if (ret)
109 ALOGE("error importing handle2 %d %x\n", hnd->fd2, hnd->format);
110 }
111
112 return ret;
113 }
114
gralloc_unregister_buffer(gralloc_module_t const * module,buffer_handle_t handle)115 int gralloc_unregister_buffer(gralloc_module_t const* module,
116 buffer_handle_t handle)
117 {
118 if (private_handle_t::validate(handle) < 0)
119 return -EINVAL;
120
121 private_handle_t* hnd = (private_handle_t*)handle;
122 ALOGV("%s: base %p %d %d %d %d\n", __func__, hnd->base, hnd->size,
123 hnd->width, hnd->height, hnd->stride);
124
125 gralloc_unmap(module, handle);
126
127 if (hnd->handle)
128 ion_free(getIonFd(module), hnd->handle);
129 if (hnd->handle1)
130 ion_free(getIonFd(module), hnd->handle1);
131 if (hnd->handle2)
132 ion_free(getIonFd(module), hnd->handle2);
133
134 return 0;
135 }
136
gralloc_lock(gralloc_module_t const * module,buffer_handle_t handle,int usage,int l,int t,int w,int h,void ** vaddr)137 int gralloc_lock(gralloc_module_t const* module,
138 buffer_handle_t handle, int usage,
139 int l, int t, int w, int h,
140 void** vaddr)
141 {
142 // this is called when a buffer is being locked for software
143 // access. in thin implementation we have nothing to do since
144 // not synchronization with the h/w is needed.
145 // typically this is used to wait for the h/w to finish with
146 // this buffer if relevant. the data cache may need to be
147 // flushed or invalidated depending on the usage bits and the
148 // hardware.
149
150 if (private_handle_t::validate(handle) < 0)
151 return -EINVAL;
152
153 private_handle_t* hnd = (private_handle_t*)handle;
154 if (!hnd->base)
155 gralloc_map(module, hnd);
156 *vaddr = (void*)hnd->base;
157 return 0;
158 }
159
gralloc_unlock(gralloc_module_t const * module,buffer_handle_t handle)160 int gralloc_unlock(gralloc_module_t const* module,
161 buffer_handle_t handle)
162 {
163 // we're done with a software buffer. nothing to do in this
164 // implementation. typically this is used to flush the data cache.
165 private_handle_t* hnd = (private_handle_t*)handle;
166 ion_sync_fd(getIonFd(module), hnd->fd);
167 if (hnd->fd1 >= 0)
168 ion_sync_fd(getIonFd(module), hnd->fd1);
169 if (hnd->fd2 >= 0)
170 ion_sync_fd(getIonFd(module), hnd->fd2);
171
172 if (private_handle_t::validate(handle) < 0)
173 return -EINVAL;
174 return 0;
175 }
176