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SubjectRe: [PATCH v3 2/2] uacce: add uacce driver
On Tue, Sep 03, 2019 at 12:14:47PM +0800, Zhangfei Gao wrote:
> From: Kenneth Lee <liguozhu@hisilicon.com>
>
> Uacce (Unified/User-space-access-intended Accelerator Framework) targets to
> provide Shared Virtual Addressing (SVA) between accelerators and processes.
> So accelerator can access any data structure of the main cpu.
> This differs from the data sharing between cpu and io device, which share
> data content rather than address.
> Since unified address, hardware and user space of process can share the
> same virtual address in the communication.
>
> Uacce create a chrdev for every registration, the queue is allocated to
> the process when the chrdev is opened. Then the process can access the
> hardware resource by interact with the queue file. By mmap the queue
> file space to user space, the process can directly put requests to the
> hardware without syscall to the kernel space.
>
> Signed-off-by: Kenneth Lee <liguozhu@hisilicon.com>
> Signed-off-by: Zaibo Xu <xuzaibo@huawei.com>
> Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
> ---
> Documentation/ABI/testing/sysfs-driver-uacce | 47 ++
> drivers/misc/Kconfig | 1 +
> drivers/misc/Makefile | 1 +
> drivers/misc/uacce/Kconfig | 13 +
> drivers/misc/uacce/Makefile | 2 +
> drivers/misc/uacce/uacce.c | 1096 ++++++++++++++++++++++++++
> include/linux/uacce.h | 172 ++++
> include/uapi/misc/uacce.h | 39 +
> 8 files changed, 1371 insertions(+)
> create mode 100644 Documentation/ABI/testing/sysfs-driver-uacce
> create mode 100644 drivers/misc/uacce/Kconfig
> create mode 100644 drivers/misc/uacce/Makefile
> create mode 100644 drivers/misc/uacce/uacce.c
> create mode 100644 include/linux/uacce.h
> create mode 100644 include/uapi/misc/uacce.h
>
> diff --git a/Documentation/ABI/testing/sysfs-driver-uacce b/Documentation/ABI/testing/sysfs-driver-uacce
> new file mode 100644
> index 0000000..ee0a66e
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-driver-uacce
> @@ -0,0 +1,47 @@
> +What: /sys/class/uacce/hisi_zip-<n>/id
> +Date: Sep 2019
> +KernelVersion: 5.3

5.3 will be released in a week or so, without this file in it, so that's
not ok here :(

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