exynos4: Add open source libsecion.
This libsecion is reverse engineered from the libsecion.so blob and then
written based on the Exynos 5 libion available in AOSP.
Change-Id: Ibe69047c78491e3c7f3173b18fcabdf327fcfbd0
Signed-off-by: angelsl <hidingfromhidden@gmail.com>
diff --git a/exynos4/hal/libsecion/libsecion.cpp b/exynos4/hal/libsecion/libsecion.cpp
new file mode 100644
index 0000000..614c6e1
--- /dev/null
+++ b/exynos4/hal/libsecion/libsecion.cpp
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "libsecion"
+
+#include <secion.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <cutils/log.h>
+
+#define ION_IOC_MAGIC 'I'
+#define ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_allocation_data)
+#define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data)
+#define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data)
+#define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data)
+#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, int)
+#define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data)
+
+typedef unsigned long ion_handle;
+
+struct ion_allocation_data {
+ size_t len;
+ size_t align;
+ unsigned int flags;
+ ion_handle *handle;
+};
+
+struct ion_fd_data {
+ ion_handle *handle;
+ int fd;
+};
+
+struct ion_handle_data {
+ ion_handle *handle;
+};
+
+struct ion_custom_data {
+ unsigned int cmd;
+ unsigned long arg;
+};
+
+struct ion_msync_data {
+ enum ION_MSYNC_FLAGS dir;
+ int fd;
+ size_t size;
+ off_t offset;
+};
+
+struct ion_phys_data {
+ int fd;
+ ion_phys_addr_t phys;
+ size_t size;
+};
+
+enum ION_EXYNOS_CUSTOM_CMD {
+ ION_EXYNOS_CUSTOM_MSYNC,
+ ION_EXYNOS_CUSTOM_PHYS
+};
+
+ion_client ion_client_create(void)
+{
+ return open("/dev/ion", O_RDWR);
+}
+
+void ion_client_destroy(ion_client client)
+{
+ close(client);
+}
+
+ion_buffer ion_alloc(ion_client client, size_t len, size_t align, unsigned int flags)
+{
+ int ret;
+ struct ion_handle_data arg_free;
+ struct ion_fd_data arg_share;
+ struct ion_allocation_data arg_alloc;
+
+ arg_alloc.len = len;
+ arg_alloc.align = align;
+ arg_alloc.flags = flags;
+
+ ret = ioctl(client, ION_IOC_ALLOC, &arg_alloc);
+ if (ret < 0)
+ return ret;
+
+ arg_share.handle = arg_alloc.handle;
+ ret = ioctl(client, ION_IOC_SHARE, &arg_share);
+
+ arg_free.handle = arg_alloc.handle;
+ ioctl(client, ION_IOC_FREE, &arg_free);
+
+ if (ret < 0)
+ return ret;
+
+ return arg_share.fd;
+}
+
+void ion_free(ion_buffer buffer)
+{
+ close(buffer);
+}
+
+void *ion_map(ion_buffer buffer, size_t len, off_t offset)
+{
+ return mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED,
+ buffer, offset);
+}
+
+int ion_unmap(void *addr, size_t len)
+{
+ return munmap(addr, len);
+}
+
+int ion_msync(ion_client client, ion_buffer buffer, enum ION_MSYNC_FLAGS flags, size_t size, off_t offset)
+{
+ struct ion_msync_data arg_cdata;
+ arg_cdata.size = size;
+ arg_cdata.dir = flags;
+ arg_cdata.fd = buffer;
+ arg_cdata.offset = offset;
+
+ struct ion_custom_data arg_custom;
+ arg_custom.cmd = ION_EXYNOS_CUSTOM_MSYNC;
+ arg_custom.arg = (unsigned long) &arg_cdata;
+
+ return ioctl(client, ION_IOC_CUSTOM, &arg_custom);
+}
+
+ion_phys_addr_t ion_getphys(ion_client client, ion_buffer buffer)
+{
+ struct ion_phys_data arg_cdata;
+ arg_cdata.fd = buffer;
+
+ struct ion_custom_data arg_custom;
+ arg_custom.cmd = ION_EXYNOS_CUSTOM_PHYS;
+ arg_custom.arg = (unsigned long) &arg_cdata;
+
+ if(ioctl(client, ION_IOC_CUSTOM, &arg_custom) < 0)
+ return 0;
+
+ return arg_cdata.phys;
+}
+
+int createIONMem(struct secion_param *param, size_t size, unsigned int flags)
+{
+ if(param->client < 0 && (param->client = ion_client_create()) < 0) {
+ ALOGE("createIONMem:: ion_client_create fail\n");
+ goto fail;
+ }
+
+ if(param->buffer < 0 && (param->buffer = ion_alloc(param->client, size, 0x10000, flags)) < 0) {
+ ALOGE("createIONMem:: ion_alloc fail\n");
+ goto fail;
+ }
+
+ if((param->physaddr = ion_getphys(param->client, param->buffer)) == 0) {
+ ALOGE("createIONMem:: ion_getphys fail, phys_addr = 0\n");
+ goto fail;
+ }
+
+ if((param->memory = ion_map(param->buffer, size, 0)) == (void*)-1) {
+ ALOGE("createIONMem:: ion_map fail\n");
+ goto fail;
+ } else {
+ param->size = size;
+ return 0;
+ }
+
+fail:
+ if(param->memory > 0) munmap(param->memory, size);
+ if(param->buffer > 0) ion_free(param->buffer);
+ param->buffer = -1;
+ param->size = 0;
+ param->memory = 0;
+ param->physaddr = 0;
+ return -1;
+}
+
+int destroyIONMem(struct secion_param *param)
+{
+ if(param->memory != 0) munmap(param->memory, param->size);
+ if(param->buffer >= 0) ion_free(param->buffer);
+ param->buffer = -1;
+ param->size = 0;
+ param->memory = 0;
+ param->physaddr = 0;
+ return 0;
+}