lkml.org 
[lkml]   [2021]   [Jul]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH V8 XRT Alveo 00/14] XRT Alveo driver overview
    Hi all,

    On Tue, Jul 20, 2021 at 12:01:34PM -0700, Tom Rix wrote:
    >
    > On 7/19/21 2:26 PM, Lizhi Hou wrote:
    > > Hello,
    > >
    > > This is V8 of patch series which adds management physical function driver
    > > for Xilinx Alveo PCIe accelerator cards.
    > > https://www.xilinx.com/products/boards-and-kits/alveo.html
    > >
    > > This driver is part of Xilinx Runtime (XRT) open source stack.
    > >
    > > XILINX ALVEO PLATFORM ARCHITECTURE
    > >
    > > Alveo PCIe FPGA based platforms have a static *shell* partition and a
    > > partial re-configurable *user* partition. The shell partition is
    > > automatically loaded from flash when host is booted and PCIe is enumerated
    > > by BIOS. Shell cannot be changed till the next cold reboot. The shell
    > > exposes two PCIe physical functions:
    > >
    > > 1. management physical function
    > > 2. user physical function
    > >
    > > The patch series includes Documentation/xrt.rst which describes Alveo
    > > platform, XRT driver architecture and deployment model in more detail.
    > >
    > > Users compile their high level design in C/C++/OpenCL or RTL into FPGA
    > > image using Vitis tools.
    > > https://www.xilinx.com/products/design-tools/vitis/vitis-platform.html
    > >
    > > The compiled image is packaged as xclbin which contains partial bitstream
    > > for the user partition and necessary metadata. Users can dynamically swap
    > > the image running on the user partition in order to switch between
    > > different workloads by loading different xclbins.
    > >
    > > XRT DRIVERS FOR XILINX ALVEO
    > >
    > > XRT Linux kernel driver *xrt-mgmt* binds to management physical function of
    > > Alveo platform. The modular driver framework is organized into several
    > > platform drivers which primarily handle the following functionality:
    > >
    > > 1. Loading firmware container also called xsabin at driver attach time
    > > 2. Loading of user compiled xclbin with FPGA Manager integration
    > > 3. Clock scaling of image running on user partition
    > > 4. In-band sensors: temp, voltage, power, etc.
    > > 5. Device reset and rescan
    > >
    > > The platform drivers are packaged into *xrt-lib* helper module with well
    > > defined interfaces. The module provides a pseudo-bus implementation for the
    > > platform drivers. More details on the driver model can be found in
    > > Documentation/xrt.rst.
    > >
    > > User physical function driver is not included in this patch series.
    > >
    > > LIBFDT REQUIREMENT
    > >
    > > XRT driver infrastructure uses Device Tree as a metadata format to discover
    > > HW subsystems in the Alveo PCIe device. The Device Tree schema used by XRT
    > > is documented in Documentation/xrt.rst.
    > >
    > > TESTING AND VALIDATION
    > >
    > > xrt-mgmt driver can be tested with full XRT open source stack which
    > > includes user space libraries, board utilities and (out of tree) first
    > > generation user physical function driver xocl. XRT open source runtime
    > > stack is available at https://github.com/Xilinx/XRT
    > >
    > > Complete documentation for XRT open source stack including sections on
    > > Alveo/XRT security and platform architecture can be found here:
    > >
    > > https://xilinx.github.io/XRT/master/html/index.html
    > > https://xilinx.github.io/XRT/master/html/security.html
    > > https://xilinx.github.io/XRT/master/html/platforms_partitions.html
    > >
    > > Changes since v7:
    > > - Followed review comment to remove non fpga subdevices:
    > > clock, clkfrq, ucs, ddr_calibaration, devctl and vsec
    > > - Collapsed include/uapi/linux/xrt/*.h into include/uapi/linux/fpga-xrt.h
    > > - Cleaned up comments in fpga-xrt.h
    > > - Fixed spelling errors in xrt.rst
    >
    > Lizhi,
    >
    > Thanks, the changes look good.
    >
    > Moritz,
    >
    > I have no outstanding issues and I do not believe there are any from anyone
    > else.
    >
    > Can this set be included in fpga-next ?

    I'll get to it this weekend, apologies for the delay guys.

    - Moritz

    \
     
     \ /
      Last update: 2021-07-22 05:22    [W:4.165 / U:0.116 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site