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>tirimbino
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/*
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* Copyright (C) 2012 Samsung Electronics Co., Ltd. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#ifndef _LIB_SECION_H_ |
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#define _LIB_SECION_H_ |
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#include <unistd.h> |
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typedef unsigned long ion_phys_addr_t; |
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typedef int ion_client; |
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typedef int ion_buffer; |
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enum ION_MSYNC_FLAGS { |
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IMSYNC_DEV_TO_READ = 0, |
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IMSYNC_DEV_TO_WRITE = 1, |
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IMSYNC_DEV_TO_RW = 2, |
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IMSYNC_SYNC_FOR_DEV = 0x10000, |
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IMSYNC_SYNC_FOR_CPU = 0x20000, |
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}; |
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struct secion_param { |
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ion_client client; |
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ion_buffer buffer; |
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size_t size; |
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void *memory; |
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ion_phys_addr_t physaddr; |
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}; |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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ion_client ion_client_create(void); |
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void ion_client_destroy(ion_client client); |
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ion_buffer ion_alloc(ion_client client, size_t len, size_t align, unsigned int flags); |
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void ion_free(ion_buffer buffer); |
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void *ion_map(ion_buffer buffer, size_t len, off_t offset); |
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int ion_unmap(void *addr, size_t len); |
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int ion_msync(ion_client client, ion_buffer buffer, enum ION_MSYNC_FLAGS flags, size_t size, off_t offset); |
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ion_phys_addr_t ion_getphys(ion_client client, ion_buffer buffer); |
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int createIONMem(struct secion_param *param, size_t size, unsigned int flags); |
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int destroyIONMem(struct secion_param *param); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _LIB_SECION_H_ */ |
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# Copyright (C) 2008 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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ifeq ($(filter-out exynos4,$(TARGET_BOARD_PLATFORM)),) |
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LOCAL_PATH:= $(call my-dir)
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include $(CLEAR_VARS) |
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LOCAL_PRELINK_MODULE := false
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LOCAL_SHARED_LIBRARIES := liblog libcutils
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LOCAL_C_INCLUDES := \
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$(LOCAL_PATH)/../include
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LOCAL_SRC_FILES := libsecion.cpp
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LOCAL_MODULE_TAGS := optional
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LOCAL_MODULE := libsecion
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include $(BUILD_SHARED_LIBRARY) |
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endif |
@ -0,0 +1,201 @@ |
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/*
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* Copyright (C) 2012 Samsung Electronics Co., Ltd. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#define LOG_TAG "libsecion" |
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#include <secion.h> |
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#include <fcntl.h> |
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#include <sys/mman.h> |
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#include <sys/ioctl.h> |
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#include <cutils/log.h> |
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#define ION_IOC_MAGIC 'I' |
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#define ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_allocation_data) |
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#define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data) |
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#define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data) |
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#define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data) |
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#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, int) |
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#define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data) |
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typedef unsigned long ion_handle; |
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struct ion_allocation_data { |
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size_t len; |
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size_t align; |
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unsigned int flags; |
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ion_handle *handle; |
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}; |
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struct ion_fd_data { |
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ion_handle *handle; |
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int fd; |
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}; |
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struct ion_handle_data { |
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ion_handle *handle; |
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}; |
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struct ion_custom_data { |
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unsigned int cmd; |
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unsigned long arg; |
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}; |
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struct ion_msync_data { |
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enum ION_MSYNC_FLAGS dir; |
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int fd; |
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size_t size; |
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off_t offset; |
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}; |
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struct ion_phys_data { |
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int fd; |
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ion_phys_addr_t phys; |
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size_t size; |
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}; |
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enum ION_EXYNOS_CUSTOM_CMD { |
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ION_EXYNOS_CUSTOM_MSYNC, |
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ION_EXYNOS_CUSTOM_PHYS |
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}; |
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ion_client ion_client_create(void) |
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{ |
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return open("/dev/ion", O_RDWR); |
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} |
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void ion_client_destroy(ion_client client) |
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{ |
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close(client); |
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} |
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ion_buffer ion_alloc(ion_client client, size_t len, size_t align, unsigned int flags) |
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{ |
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int ret; |
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struct ion_handle_data arg_free; |
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struct ion_fd_data arg_share; |
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struct ion_allocation_data arg_alloc; |
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arg_alloc.len = len; |
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arg_alloc.align = align; |
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arg_alloc.flags = flags; |
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ret = ioctl(client, ION_IOC_ALLOC, &arg_alloc); |
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if (ret < 0) |
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return ret; |
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arg_share.handle = arg_alloc.handle; |
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ret = ioctl(client, ION_IOC_SHARE, &arg_share); |
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arg_free.handle = arg_alloc.handle; |
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ioctl(client, ION_IOC_FREE, &arg_free); |
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if (ret < 0) |
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return ret; |
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return arg_share.fd; |
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} |
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void ion_free(ion_buffer buffer) |
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{ |
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close(buffer); |
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} |
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void *ion_map(ion_buffer buffer, size_t len, off_t offset) |
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{ |
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return mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, |
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buffer, offset); |
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} |
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int ion_unmap(void *addr, size_t len) |
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{ |
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return munmap(addr, len); |
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} |
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int ion_msync(ion_client client, ion_buffer buffer, enum ION_MSYNC_FLAGS flags, size_t size, off_t offset) |
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{ |
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struct ion_msync_data arg_cdata; |
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arg_cdata.size = size; |
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arg_cdata.dir = flags; |
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arg_cdata.fd = buffer; |
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arg_cdata.offset = offset; |
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struct ion_custom_data arg_custom; |
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arg_custom.cmd = ION_EXYNOS_CUSTOM_MSYNC; |
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arg_custom.arg = (unsigned long) &arg_cdata; |
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return ioctl(client, ION_IOC_CUSTOM, &arg_custom); |
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} |
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ion_phys_addr_t ion_getphys(ion_client client, ion_buffer buffer) |
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{ |
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struct ion_phys_data arg_cdata; |
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arg_cdata.fd = buffer; |
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struct ion_custom_data arg_custom; |
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arg_custom.cmd = ION_EXYNOS_CUSTOM_PHYS; |
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arg_custom.arg = (unsigned long) &arg_cdata; |
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if(ioctl(client, ION_IOC_CUSTOM, &arg_custom) < 0) |
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return 0; |
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return arg_cdata.phys; |
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} |
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int createIONMem(struct secion_param *param, size_t size, unsigned int flags) |
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{ |
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if(param->client < 0 && (param->client = ion_client_create()) < 0) { |
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ALOGE("createIONMem:: ion_client_create fail\n"); |
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goto fail; |
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} |
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if(param->buffer < 0 && (param->buffer = ion_alloc(param->client, size, 0x10000, flags)) < 0) { |
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ALOGE("createIONMem:: ion_alloc fail\n"); |
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goto fail; |
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} |
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if((param->physaddr = ion_getphys(param->client, param->buffer)) == 0) { |
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ALOGE("createIONMem:: ion_getphys fail, phys_addr = 0\n"); |
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goto fail; |
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} |
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if((param->memory = ion_map(param->buffer, size, 0)) == (void*)-1) { |
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ALOGE("createIONMem:: ion_map fail\n"); |
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goto fail; |
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} else { |
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param->size = size; |
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return 0; |
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} |
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fail: |
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if(param->memory > 0) munmap(param->memory, size); |
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if(param->buffer > 0) ion_free(param->buffer); |
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param->buffer = -1; |
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param->size = 0; |
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param->memory = 0; |
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param->physaddr = 0; |
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return -1; |
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} |
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int destroyIONMem(struct secion_param *param) |
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{ |
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if(param->memory != 0) munmap(param->memory, param->size); |
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if(param->buffer >= 0) ion_free(param->buffer); |
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param->buffer = -1; |
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param->size = 0; |
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param->memory = 0; |
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param->physaddr = 0; |
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return 0; |
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} |
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