On 2019/10/10 下午8:33, Greg Kroah-Hartman wrote:
On Wed, Oct 09, 2019 at 11:21:42PM +0800, Zhangfei Gao wrote:
From: Kenneth Lee <liguozhu@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Signed-off-by: Zaibo Xu <xuzaibo@xxxxxxxxxx>
Signed-off-by: Zhou Wang <wangzhou1@xxxxxxxxxxxxx>
Signed-off-by: Zhangfei Gao <zhangfei.gao@xxxxxxxxxx>
No one is using these new apis you are creating, so we can not judge if
they are correct or not. Please submit this as a patch series with a
driver that is actually going to use this api.
Thanks Greg,
Just sent v5 with an example of using uacce register interface.
Would you mind take a look.
Thanks
