diff --git a/libion/ion_4.12.h b/libion/ion_4.12.h new file mode 100644 index 000000000..6ae79d4e8 --- /dev/null +++ b/libion/ion_4.12.h @@ -0,0 +1,125 @@ +/* + * Adapted from drivers/staging/android/uapi/ion.h + * + * Copyright (C) 2011 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef _UAPI_LINUX_ION_NEW_H +#define _UAPI_LINUX_ION_NEW_H + +#include +#include + +#define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8) + +/** + * DOC: Ion Userspace API + * + * create a client by opening /dev/ion + * most operations handled via following ioctls + * + */ + +/** + * struct ion_new_allocation_data - metadata passed from userspace for allocations + * @len: size of the allocation + * @heap_id_mask: mask of heap ids to allocate from + * @flags: flags passed to heap + * @handle: pointer that will be populated with a cookie to use to + * refer to this allocation + * + * Provided by userspace as an argument to the ioctl - added _new to denote + * this belongs to the new ION interface. + */ +struct ion_new_allocation_data { + __u64 len; + __u32 heap_id_mask; + __u32 flags; + __u32 fd; + __u32 unused; +}; + +#define MAX_HEAP_NAME 32 + +/** + * struct ion_heap_data - data about a heap + * @name - first 32 characters of the heap name + * @type - heap type + * @heap_id - heap id for the heap + */ +struct ion_heap_data { + char name[MAX_HEAP_NAME]; + __u32 type; + __u32 heap_id; + __u32 reserved0; + __u32 reserved1; + __u32 reserved2; +}; + +/** + * struct ion_heap_query - collection of data about all heaps + * @cnt - total number of heaps to be copied + * @heaps - buffer to copy heap data + */ +struct ion_heap_query { + __u32 cnt; /* Total number of heaps to be copied */ + __u32 reserved0; /* align to 64bits */ + __u64 heaps; /* buffer to be populated */ + __u32 reserved1; + __u32 reserved2; +}; + +#define ION_IOC_MAGIC 'I' + +/** + * DOC: ION_IOC_NEW_ALLOC - allocate memory + * + * Takes an ion_allocation_data struct and returns it with the handle field + * populated with the opaque handle for the allocation. + * TODO: This IOCTL will clash by design; however, only one of + * ION_IOC_ALLOC or ION_IOC_NEW_ALLOC paths will be exercised, + * so this should not conflict. + */ +#define ION_IOC_NEW_ALLOC _IOWR(ION_IOC_MAGIC, 0, struct ion_new_allocation_data) + +/** + * DOC: ION_IOC_FREE - free memory + * + * Takes an ion_handle_data struct and frees the handle. + * + * #define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data) + * This will come from the older kernels, so don't redefine here + */ + +/** + * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation + * + * Takes an ion_fd_data struct with the handle field populated with a valid + * opaque handle. Returns the struct with the fd field set to a file + * descriptor open in the current address space. This file descriptor + * can then be passed to another process. The corresponding opaque handle can + * be retrieved via ION_IOC_IMPORT. + * + * #define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data) + * This will come from the older kernels, so don't redefine here + */ + +/** + * DOC: ION_IOC_HEAP_QUERY - information about available heaps + * + * Takes an ion_heap_query structure and populates information about + * available Ion heaps. + */ +#define ION_IOC_HEAP_QUERY _IOWR(ION_IOC_MAGIC, 8, struct ion_heap_query) + +#endif /* _UAPI_LINUX_ION_NEW_H */