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 k-h
