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>

4 files changed, 294 insertions, 1 deletions

diff --git a/exynos4/hal/Android.mk b/exynos4/hal/Android.mk
index 6b9a7ce..1a9c10e 100644
--- a/exynos4/hal/Android.mk
+++ b/exynos4/hal/Android.mk
@@ -16,7 +16,7 @@
 
 ifeq ($(TARGET_BOARD_PLATFORM),exynos4)
 
-common_exynos4_dirs := libgralloc_ump libhdmi libhwcomposer libhwconverter
+common_exynos4_dirs := libgralloc_ump libhdmi libhwcomposer libhwconverter libsecion
 
 ifneq ($(BOARD_USES_PROPRIETARY_LIBCAMERA),true)
 common_exynos4_dirs += libcamera
diff --git a/exynos4/hal/include/secion.h b/exynos4/hal/include/secion.h
new file mode 100644
index 0000000..eb701e9
--- /dev/null
+++ b/exynos4/hal/include/secion.h
@@ -0,0 +1,60 @@
+/*
+ * 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.
+ */
+
+#ifndef _LIB_SECION_H_
+#define _LIB_SECION_H_
+
+#include <unistd.h>
+
+typedef unsigned long ion_phys_addr_t;
+typedef int ion_client;
+typedef int ion_buffer;
+
+enum ION_MSYNC_FLAGS {
+    IMSYNC_DEV_TO_READ = 0,
+    IMSYNC_DEV_TO_WRITE = 1,
+    IMSYNC_DEV_TO_RW = 2,
+    IMSYNC_SYNC_FOR_DEV = 0x10000,
+    IMSYNC_SYNC_FOR_CPU = 0x20000,
+};
+
+struct secion_param {
+    ion_client client;
+    ion_buffer buffer;
+    size_t size;
+    void *memory;
+    ion_phys_addr_t physaddr;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+ion_client ion_client_create(void);
+void ion_client_destroy(ion_client client);
+ion_buffer ion_alloc(ion_client client, size_t len, size_t align, unsigned int flags);
+void ion_free(ion_buffer buffer);
+void *ion_map(ion_buffer buffer, size_t len, off_t offset);
+int ion_unmap(void *addr, size_t len);
+int ion_msync(ion_client client, ion_buffer buffer, enum ION_MSYNC_FLAGS flags, size_t size, off_t offset);
+ion_phys_addr_t ion_getphys(ion_client client, ion_buffer buffer);
+int createIONMem(struct secion_param *param, size_t size, unsigned int flags);
+int destroyIONMem(struct secion_param *param);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _LIB_SECION_H_ */
diff --git a/exynos4/hal/libsecion/Android.mk b/exynos4/hal/libsecion/Android.mk
new file mode 100644
index 0000000..349c53b
--- /dev/null
+++ b/exynos4/hal/libsecion/Android.mk
@@ -0,0 +1,32 @@
+# Copyright (C) 2008 The Android Open Source Project
+#
+# 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.
+
+ifeq ($(filter-out exynos4,$(TARGET_BOARD_PLATFORM)),)
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_PRELINK_MODULE := false
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+
+LOCAL_C_INCLUDES := \
+	$(LOCAL_PATH)/../include
+
+LOCAL_SRC_FILES := libsecion.cpp
+
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE := libsecion
+include $(BUILD_SHARED_LIBRARY)
+
+endif
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;
+}