30313f8bc0
4.12+ kernels have substantially different ION interface. Adapt libion to the new one. In doing so, for sake of clarity, rename ION_IOC_ALLOC to ION_IOC_NEW_ALLOC the to denote new mechanism. An ion_is_legacy() is provided to check whether the kernel supports old ION interface or new. Userspace has the responsibility to use it accordingly. Devices using kernels without the 4.12 ION updates, can continue to use libion as before, and will have no impact. Only devices using libion with 4.12+ kernels (or kernels with backported ION updates) will need to update their users of libion, including gralloc. Test: validated with hikey gralloc, with both old and new kernels Signed-off-by: Laura Abbott <labbott@redhat.com> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> [sumits: keep old abi compatibility] Change-Id: I7899af9e812d0cf5e73b443a3f0248118b42a382
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/*
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* ion.c
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*
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* Memory Allocator functions for ion
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*
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* Copyright 2011 Google, Inc
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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 __SYS_CORE_ION_H
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#define __SYS_CORE_ION_H
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#include <sys/types.h>
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#include <linux/ion.h>
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__BEGIN_DECLS
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struct ion_handle;
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int ion_open();
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int ion_close(int fd);
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int ion_alloc(int fd, size_t len, size_t align, unsigned int heap_mask,
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unsigned int flags, ion_user_handle_t *handle);
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int ion_alloc_fd(int fd, size_t len, size_t align, unsigned int heap_mask,
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unsigned int flags, int *handle_fd);
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int ion_sync_fd(int fd, int handle_fd);
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int ion_free(int fd, ion_user_handle_t handle);
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int ion_map(int fd, ion_user_handle_t handle, size_t length, int prot,
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int flags, off_t offset, unsigned char **ptr, int *map_fd);
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int ion_share(int fd, ion_user_handle_t handle, int *share_fd);
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int ion_import(int fd, int share_fd, ion_user_handle_t *handle);
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/**
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* Add 4.12+ kernel ION interfaces here for forward compatibility
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* This should be needed till the pre-4.12+ ION interfaces are backported.
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*/
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int ion_query_heap_cnt(int fd, int* cnt);
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int ion_query_get_heaps(int fd, int cnt, void* buffers);
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int ion_is_legacy(int fd);
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__END_DECLS
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#endif /* __SYS_CORE_ION_H */
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