Hi Tom,
On 06/03/2021 07:23 AM, Tom Rix wrote:
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
It would be ideal if we make incremental changes to move xrt xleaf
drivers to other subsystems. One question comes to mind if xleaf drivers
move to different subsystems they would need to become independent ko.
That would require load/unload dependency management complicating the
design. Also if we go in that direction xdevice.h should move to
linux/include?
how clean are the public headers
Is there anything in the public header we need to change?
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.
We will wait for the new structure of dfl/ and make necessary for xrt/
accordingly.
Thanks,
Lizhi
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@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-2-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-3-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-4-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-5-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-6-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-7-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-8-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-9-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-10-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-11-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-12-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-13-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-14-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-15-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-16-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-17-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-18-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-19-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-20-lizhi.hou@xxxxxxxxxx/
https://lore.kernel.org/lkml/20210512015339.5649-21-lizhi.hou@xxxxxxxxxx/
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
