On Tue, Sep 03, 2019 at 12:14:47PM +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> > --- > 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 :(
