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[75.142.250.213]) by smtp.gmail.com with ESMTPSA id w11sm654773oov.19.2021.06.03.07.23.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Jun 2021 07:23:13 -0700 (PDT) Subject: RFC : [PATCH V7 XRT Alveo 00/20] XRT Alveo driver overview To: Lizhi Hou , linux-kernel@vger.kernel.org, "Wu, Hao" , "mdf@kernel.org" Cc: linux-fpga@vger.kernel.org, maxz@xilinx.com, sonal.santan@xilinx.com, yliu@xilinx.com, michal.simek@xilinx.com, stefanos@xilinx.com, devicetree@vger.kernel.org, mdf@kernel.org, robh@kernel.org References: <20210528004959.61354-1-lizhi.hou@xilinx.com> From: Tom Rix Message-ID: <68e85a4f-4a10-1ff9-0443-aa565878c855@redhat.com> Date: Thu, 3 Jun 2021 07:23:10 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 6/2/21 3:34 PM, Lizhi Hou wrote: > Hi Moritz and Tom, > > Thanks a lot for reviewing the XRT patches. This v7 patches contains > our latest fixes for all review comments. And it seems auto build > robot is happy with it as well. Do you have more comment against v7? > What will be the next step for XRT patches if it looks ok to you? Please do not add any features to the patchset. When you add a feature, that tends to reset the review process. For little stuff. I need to look at the documentation again, iirc that was the only issue in v6. For big stuff. At the beginning some possible refactor questions were raised, I don't know if they have been resolved. ex/ some of the leaf drivers like clock should be moved the clock subsystem the xrt/ dir vs existing flat, we don't want both. is your xrt bus consistent with dfl bus, can it support adding devices outside of fpga/xrt how clean are the public headers Since flipflopping on refactoring is a painful, let's try to get a consensus before moving forward. This may mean the patchset is committed by parts as it and the existing code changes. Lets start with the directory structure. Since there are a lot of files in xrt, the xrt/ makes sense. For other fpga's with a lot of files, say > 3, we need to change ex/ dfl-foo.c to dfl/foo.c to be consistent. The Kconfig and Makefiles for xrt/ and dfl/ would only be in that top subdir. Which i think is a change for xrt/ I'll whip up something for dfl/ to move things along. Tom > > Thanks, > > Lizhi > > > On 05/27/2021 05:49 PM, Lizhi Hou wrote: >> Hello, >> >> This is V7 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 v6: >> - Resolved grammatical errors and cleaned up taxonomy in xrt.rst >>    documentation. >> - Fixed clang warnings. >> - Updated code base to include v6 code review comments. >> >> Changes since v5: >> - Revert all changes 'mgnt/MGNT' back to 'mgmt/MGMT' >> - Updated code base to include v5 code review comments. >>     xrt.rst: address grammar and taxonomy >>     subdev_id.h: defines XRT_SUBDEV_INVALID = 0 >>     xclbin.c: change shift operation to be_to_cpu >> - Resolved kernel test robot errors. >> >> Changes since v4: >> - Added xrt_bus_type and xrt_device. All sub devices were changed from >>    platform_bus_type/platform_device to xrt_bus_type/xrt_device. >> - Renamed xrt-mgmt driver to xrt-mgnt driver. >> - Replaced 'MGMT' with 'MGNT' and 'mgmt' with 'mgnt' in code and file >> names >> - Moved pci function calls from infrastructure to xrt-mgnt driver. >> - Renamed files: mgmt/main.c -> mgnt/xmgnt-main.c >>                   mgmt/main-region.c -> mgnt/xmgnt-main-region.c >>                   include/xmgmt-main.h -> include/xmgnt-main.h >>                   mgmt/fmgr-drv.c -> mgnt/xrt-mgr.c >>                   mgmt/fmgr.h -> mgnt/xrt-mgr.h >> - Updated code base to include v4 code review comments. >> >> Changes since v3: >> - Leaf drivers use regmap-mmio to access hardware registers. >> - Renamed driver module: xmgmt.ko -> xrt-mgmt.ko >> - Renamed files: calib.[c|h] -> ddr_calibration.[c|h], >>                   lib/main.[c|h] -> lib/lib-drv.[c|h], >>                   mgmt/main-impl.h - > mgmt/xmgnt.h >> - Updated code base to include v3 code review comments. >> >> Changes since v2: >> - Streamlined the driver framework into *xleaf*, *group* and *xroot* >> - Updated documentation to show the driver model with examples >> - Addressed kernel test robot errors >> - Added a selftest for basic driver framework >> - Documented device tree schema >> - Removed need to export libfdt symbols >> >> Changes since v1: >> - Updated the driver to use fpga_region and fpga_bridge for FPGA >>    programming >> - Dropped platform drivers not related to PR programming to focus on XRT >>    core framework >> - Updated Documentation/fpga/xrt.rst with information on XRT core >> framework >> - Addressed checkpatch issues >> - Dropped xrt- prefix from some header files >> >> For reference V6 version of patch series can be found here: >> >> https://lore.kernel.org/lkml/20210512015339.5649-1-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-2-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-3-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-4-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-5-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-6-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-7-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-8-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-9-lizhi.hou@xilinx.com/ >> https://lore.kernel.org/lkml/20210512015339.5649-10-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-11-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-12-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-13-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-14-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-15-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-16-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-17-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-18-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-19-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-20-lizhi.hou@xilinx.com/ >> >> https://lore.kernel.org/lkml/20210512015339.5649-21-lizhi.hou@xilinx.com/ >> >> >> Lizhi Hou (20): >>    Documentation: fpga: Add a document describing XRT Alveo drivers >>    fpga: xrt: driver metadata helper functions >>    fpga: xrt: xclbin file helper functions >>    fpga: xrt: xrt-lib driver manager >>    fpga: xrt: group driver >>    fpga: xrt: char dev node helper functions >>    fpga: xrt: root driver infrastructure >>    fpga: xrt: driver infrastructure >>    fpga: xrt: management physical function driver (root) >>    fpga: xrt: main driver for management function device >>    fpga: xrt: fpga-mgr and region implementation for xclbin download >>    fpga: xrt: VSEC driver >>    fpga: xrt: User Clock Subsystem driver >>    fpga: xrt: ICAP driver >>    fpga: xrt: devctl xrt driver >>    fpga: xrt: clock driver >>    fpga: xrt: clock frequency counter driver >>    fpga: xrt: DDR calibration driver >>    fpga: xrt: partition isolation driver >>    fpga: xrt: Kconfig and Makefile updates for XRT drivers >> >>   Documentation/fpga/index.rst                  |   1 + >>   Documentation/fpga/xrt.rst                    | 870 ++++++++++++++++++ >>   MAINTAINERS                                   |  11 + >>   drivers/Makefile                              |   1 + >>   drivers/fpga/Kconfig                          |   2 + >>   drivers/fpga/Makefile                         |   5 + >>   drivers/fpga/xrt/Kconfig                      |   8 + >>   drivers/fpga/xrt/include/events.h             |  45 + >>   drivers/fpga/xrt/include/group.h              |  25 + >>   drivers/fpga/xrt/include/metadata.h           | 236 +++++ >>   drivers/fpga/xrt/include/subdev_id.h          |  39 + >>   drivers/fpga/xrt/include/xclbin-helper.h      |  48 + >>   drivers/fpga/xrt/include/xdevice.h            | 131 +++ >>   drivers/fpga/xrt/include/xleaf.h              | 205 +++++ >>   drivers/fpga/xrt/include/xleaf/axigate.h      |  23 + >>   drivers/fpga/xrt/include/xleaf/clkfreq.h      |  21 + >>   drivers/fpga/xrt/include/xleaf/clock.h        |  29 + >>   .../fpga/xrt/include/xleaf/ddr_calibration.h  |  28 + >>   drivers/fpga/xrt/include/xleaf/devctl.h       |  40 + >>   drivers/fpga/xrt/include/xleaf/icap.h         |  27 + >>   drivers/fpga/xrt/include/xmgmt-main.h         |  34 + >>   drivers/fpga/xrt/include/xroot.h              | 117 +++ >>   drivers/fpga/xrt/lib/Kconfig                  |  17 + >>   drivers/fpga/xrt/lib/Makefile                 |  30 + >>   drivers/fpga/xrt/lib/cdev.c                   | 209 +++++ >>   drivers/fpga/xrt/lib/group.c                  | 278 ++++++ >>   drivers/fpga/xrt/lib/lib-drv.c                | 328 +++++++ >>   drivers/fpga/xrt/lib/lib-drv.h                |  21 + >>   drivers/fpga/xrt/lib/subdev.c                 | 859 +++++++++++++++++ >>   drivers/fpga/xrt/lib/subdev_pool.h            |  53 ++ >>   drivers/fpga/xrt/lib/xclbin.c                 | 381 ++++++++ >>   drivers/fpga/xrt/lib/xleaf/axigate.c          | 325 +++++++ >>   drivers/fpga/xrt/lib/xleaf/clkfreq.c          | 223 +++++ >>   drivers/fpga/xrt/lib/xleaf/clock.c            | 652 +++++++++++++ >>   drivers/fpga/xrt/lib/xleaf/ddr_calibration.c  | 210 +++++ >>   drivers/fpga/xrt/lib/xleaf/devctl.c           | 169 ++++ >>   drivers/fpga/xrt/lib/xleaf/icap.c             | 328 +++++++ >>   drivers/fpga/xrt/lib/xleaf/ucs.c              | 152 +++ >>   drivers/fpga/xrt/lib/xleaf/vsec.c             | 372 ++++++++ >>   drivers/fpga/xrt/lib/xroot.c                  | 536 +++++++++++ >>   drivers/fpga/xrt/metadata/Kconfig             |  12 + >>   drivers/fpga/xrt/metadata/Makefile            |  16 + >>   drivers/fpga/xrt/metadata/metadata.c          | 578 ++++++++++++ >>   drivers/fpga/xrt/mgmt/Kconfig                 |  15 + >>   drivers/fpga/xrt/mgmt/Makefile                |  19 + >>   drivers/fpga/xrt/mgmt/root.c                  | 420 +++++++++ >>   drivers/fpga/xrt/mgmt/xmgmt-main-region.c     | 483 ++++++++++ >>   drivers/fpga/xrt/mgmt/xmgmt-main.c            | 662 +++++++++++++ >>   drivers/fpga/xrt/mgmt/xmgmt.h                 |  33 + >>   drivers/fpga/xrt/mgmt/xrt-mgr.c               | 190 ++++ >>   drivers/fpga/xrt/mgmt/xrt-mgr.h               |  16 + >>   include/uapi/linux/xrt/xclbin.h               | 409 ++++++++ >>   include/uapi/linux/xrt/xmgmt-ioctl.h          |  46 + >>   53 files changed, 9988 insertions(+) >>   create mode 100644 Documentation/fpga/xrt.rst >>   create mode 100644 drivers/fpga/xrt/Kconfig >>   create mode 100644 drivers/fpga/xrt/include/events.h >>   create mode 100644 drivers/fpga/xrt/include/group.h >>   create mode 100644 drivers/fpga/xrt/include/metadata.h >>   create mode 100644 drivers/fpga/xrt/include/subdev_id.h >>   create mode 100644 drivers/fpga/xrt/include/xclbin-helper.h >>   create mode 100644 drivers/fpga/xrt/include/xdevice.h >>   create mode 100644 drivers/fpga/xrt/include/xleaf.h >>   create mode 100644 drivers/fpga/xrt/include/xleaf/axigate.h >>   create mode 100644 drivers/fpga/xrt/include/xleaf/clkfreq.h >>   create mode 100644 drivers/fpga/xrt/include/xleaf/clock.h >>   create mode 100644 drivers/fpga/xrt/include/xleaf/ddr_calibration.h >>   create mode 100644 drivers/fpga/xrt/include/xleaf/devctl.h >>   create mode 100644 drivers/fpga/xrt/include/xleaf/icap.h >>   create mode 100644 drivers/fpga/xrt/include/xmgmt-main.h >>   create mode 100644 drivers/fpga/xrt/include/xroot.h >>   create mode 100644 drivers/fpga/xrt/lib/Kconfig >>   create mode 100644 drivers/fpga/xrt/lib/Makefile >>   create mode 100644 drivers/fpga/xrt/lib/cdev.c >>   create mode 100644 drivers/fpga/xrt/lib/group.c >>   create mode 100644 drivers/fpga/xrt/lib/lib-drv.c >>   create mode 100644 drivers/fpga/xrt/lib/lib-drv.h >>   create mode 100644 drivers/fpga/xrt/lib/subdev.c >>   create mode 100644 drivers/fpga/xrt/lib/subdev_pool.h >>   create mode 100644 drivers/fpga/xrt/lib/xclbin.c >>   create mode 100644 drivers/fpga/xrt/lib/xleaf/axigate.c >>   create mode 100644 drivers/fpga/xrt/lib/xleaf/clkfreq.c >>   create mode 100644 drivers/fpga/xrt/lib/xleaf/clock.c >>   create mode 100644 drivers/fpga/xrt/lib/xleaf/ddr_calibration.c >>   create mode 100644 drivers/fpga/xrt/lib/xleaf/devctl.c >>   create mode 100644 drivers/fpga/xrt/lib/xleaf/icap.c >>   create mode 100644 drivers/fpga/xrt/lib/xleaf/ucs.c >>   create mode 100644 drivers/fpga/xrt/lib/xleaf/vsec.c >>   create mode 100644 drivers/fpga/xrt/lib/xroot.c >>   create mode 100644 drivers/fpga/xrt/metadata/Kconfig >>   create mode 100644 drivers/fpga/xrt/metadata/Makefile >>   create mode 100644 drivers/fpga/xrt/metadata/metadata.c >>   create mode 100644 drivers/fpga/xrt/mgmt/Kconfig >>   create mode 100644 drivers/fpga/xrt/mgmt/Makefile >>   create mode 100644 drivers/fpga/xrt/mgmt/root.c >>   create mode 100644 drivers/fpga/xrt/mgmt/xmgmt-main-region.c >>   create mode 100644 drivers/fpga/xrt/mgmt/xmgmt-main.c >>   create mode 100644 drivers/fpga/xrt/mgmt/xmgmt.h >>   create mode 100644 drivers/fpga/xrt/mgmt/xrt-mgr.c >>   create mode 100644 drivers/fpga/xrt/mgmt/xrt-mgr.h >>   create mode 100644 include/uapi/linux/xrt/xclbin.h >>   create mode 100644 include/uapi/linux/xrt/xmgmt-ioctl.h >> >