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author | Kito Cheng <kito.cheng@sifive.com> | 2021-01-08 11:41:26 +0800 |
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committer | Kito Cheng <kito.cheng@sifive.com> | 2021-04-01 11:11:29 +0800 |
commit | a736f13279640936c2864c338e7c09c4777e1766 (patch) | |
tree | fbe30677f70fadad92d5514611463db9a8f1dcd3 /linux-headers/include/linux/dma-heap.h | |
parent | 457daed7711b579a1ee538a9e1f202735bfe8903 (diff) | |
download | riscv-gnu-toolchain-a736f13279640936c2864c338e7c09c4777e1766.zip riscv-gnu-toolchain-a736f13279640936c2864c338e7c09c4777e1766.tar.gz riscv-gnu-toolchain-a736f13279640936c2864c338e7c09c4777e1766.tar.bz2 |
Update linux header to 5.10.5
Diffstat (limited to 'linux-headers/include/linux/dma-heap.h')
-rw-r--r-- | linux-headers/include/linux/dma-heap.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/linux-headers/include/linux/dma-heap.h b/linux-headers/include/linux/dma-heap.h new file mode 100644 index 0000000..96b90cf --- /dev/null +++ b/linux-headers/include/linux/dma-heap.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * DMABUF Heaps Userspace API + * + * Copyright (C) 2011 Google, Inc. + * Copyright (C) 2019 Linaro Ltd. + */ +#ifndef _LINUX_DMABUF_POOL_H +#define _LINUX_DMABUF_POOL_H + +#include <linux/ioctl.h> +#include <linux/types.h> + +/** + * DOC: DMABUF Heaps Userspace API + */ + +/* Valid FD_FLAGS are O_CLOEXEC, O_RDONLY, O_WRONLY, O_RDWR */ +#define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE) + +/* Currently no heap flags */ +#define DMA_HEAP_VALID_HEAP_FLAGS (0) + +/** + * struct dma_heap_allocation_data - metadata passed from userspace for + * allocations + * @len: size of the allocation + * @fd: will be populated with a fd which provides the + * handle to the allocated dma-buf + * @fd_flags: file descriptor flags used when allocating + * @heap_flags: flags passed to heap + * + * Provided by userspace as an argument to the ioctl + */ +struct dma_heap_allocation_data { + __u64 len; + __u32 fd; + __u32 fd_flags; + __u64 heap_flags; +}; + +#define DMA_HEAP_IOC_MAGIC 'H' + +/** + * DOC: DMA_HEAP_IOCTL_ALLOC - allocate memory from pool + * + * Takes a dma_heap_allocation_data struct and returns it with the fd field + * populated with the dmabuf handle of the allocation. + */ +#define DMA_HEAP_IOCTL_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\ + struct dma_heap_allocation_data) + +#endif /* _LINUX_DMABUF_POOL_H */ |