| /* |
| * Adapted from drivers/staging/android/uapi/ion.h |
| * |
| * Copyright (C) 2019 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 <linux/ioctl.h> |
| #include <linux/types.h> |
| |
| #define ION_NUM_HEAP_IDS (sizeof(unsigned int) * 8) |
| |
| enum ion_heap_type_ext { |
| ION_HEAP_TYPE_CUSTOM_EXT = 16, |
| ION_HEAP_TYPE_MAX = 31, |
| }; |
| |
| /** |
| * ion_heap_id - list of standard heap ids that Android can use |
| * |
| * @ION_HEAP_SYSTEM Id for the ION_HEAP_TYPE_SYSTEM |
| * @ION_HEAP_DMA_START Start of reserved id range for heaps of type |
| * ION_HEAP_TYPE_DMA |
| * @ION_HEAP_DMA_END End of reserved id range for heaps of type |
| * ION_HEAP_TYPE_DMA |
| * @ION_HEAP_CUSTOM_START Start of reserved id range for heaps of custom |
| * type |
| * @ION_HEAP_CUSTOM_END End of reserved id range for heaps of custom |
| * type |
| */ |
| enum ion_heap_id { |
| ION_HEAP_SYSTEM = (1 << ION_HEAP_TYPE_SYSTEM), |
| ION_HEAP_DMA_START = (ION_HEAP_SYSTEM << 1), |
| ION_HEAP_DMA_END = (ION_HEAP_DMA_START << 7), |
| ION_HEAP_CUSTOM_START = (ION_HEAP_DMA_END << 1), |
| ION_HEAP_CUSTOM_END = (ION_HEAP_CUSTOM_START << 22), |
| }; |
| |
| #define ION_NUM_MAX_HEAPS (32) |
| |
| /** |
| * 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) |
| |
| /** |
| * DOC: ION_IOC_HEAP_ABI_VERSION - return ABI version |
| * |
| * Returns ABI version for this driver |
| */ |
| #define ION_IOC_ABI_VERSION _IOR(ION_IOC_MAGIC, 9, __u32) |
| |
| #endif /* _UAPI_LINUX_ION_NEW_H */ |