isa0061/input0 "!lm_J*j"T Ɯbѿ h!0x10000040 # o#/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_CONTAINER_OF_H #define _LINUX_CONTAINER_OF_H #include #include #define typeof_member(T, m) typeof(((T*)0)->m) /** * container_of - cast a member of a structure out to the containing structure * @ptr: the pointer to the member. * @type: the type of the container struct this is embedded in. * @member: the name of the member within the struct. * */ #define container_of(ptr, type, member) ({ \ void *__mptr = (void *)(ptr); \ static_assert(__same_type(*(ptr), ((type *)0)->member) || \ __same_type(*(ptr), void), \ "pointer type mismatch in container_of()"); \ ((type *)(__mptr - offsetof(type, member))); }) /** * container_of_const - cast a member of a structure out to the containing * structure and preserve the const-ness of the pointer * @ptr: the pointer to the member * @type: the type of the container struct this is embedded in. * @member: the name of the member within the struct. */ #define container_of_const(ptr, type, member) \ _Generic(ptr, \ const typeof(*(ptr)) *: ((const type *)container_of(ptr, type, member)),\ default: ((type *)container_of(ptr, type, member)) \ ) #endif /* _LINUX_CONTAINER_OF_H */ #% lM;am_J*j"T Ɵ۪bѿ%/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Framework for buffer objects that can be shared across devices/subsystems. * * Copyright(C) 2015 Intel Ltd * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. * * 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. * * You should have received a copy of the GNU General Public License along with * this program. If not, see . */ #ifndef _DMA_BUF_UAPI_H_ #define _DMA_BUF_UAPI_H_ #include /* begin/end dma-buf functions used for userspace mmap. */ struct dma_buf_sync { __u64 flags; }; #define DMA_BUF_SYNC_READ (1 << 0) #define DMA_BUF_SYNC_WRITE (2 << 0) #define DMA_BUF_SYNC_RW (DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE) #define DMA_BUF_SYNC_START (0 << 2) #define DMA_BUF_SYNC_END (1 << 2) #define DMA_BUF_SYNC_VALID_FLAGS_MASK \ (DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END) #define DMA_BUF_NAME_LEN 32 /** * struct dma_buf_export_sync_file - Get a sync_file from a dma-buf * * Userspace can perform a DMA_BUF_IOCTL_EXPORT_SYNC_FILE to retrieve the * current set of fences on a dma-buf file descriptor as a sync_file. CPU * waits via poll() or other driver-specific mechanisms typically wait on * whatever fences are on the dma-buf at the time the wait begins. This * is similar except that it takes a snapshot of the current fences on the * dma-buf for waiting later instead of waiting immediately. This is * useful for modern graphics APIs such as Vulkan which assume an explicit * synchronization model but still need to inter-operate with dma-buf. * * The intended usage pattern is the following: * * 1. Export a sync_file with flags corresponding to the expected GPU usage * via DMA_BUF_IOCTL_EXPORT_SYNC_FILE. * * 2. Submit rendering work which uses the dma-buf. The work should wait on * the exported sync file before rendering and produce another sync_file * when complete. * * 3. Import the rendering-complete sync_file into the dma-buf with flags * corresponding to the GPU usage via DMA_BUF_IOCTL_IMPORT_SYNC_FILE. * * Unlike doing implicit synchronization via a GPU kernel driver's exec ioctl, * the above is not a single atomic operation. If userspace wants to ensure * ordering via these fences, it is the respnosibi