Re: [PATCH V5 XRT Alveo 01/20] Documentation: fpga: Add a document describing XRT Alveo drivers

From: Tom Rix
Date: Wed Apr 28 2021 - 15:40:53 EST

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On 4/27/21 1:54 PM, Lizhi Hou wrote:

Describe XRT driver architecture and provide basic overview of
Xilinx Alveo platform.

Signed-off-by: Sonal Santan <sonal.santan@xxxxxxxxxx>
Signed-off-by: Max Zhen <max.zhen@xxxxxxxxxx>
Signed-off-by: Lizhi Hou <lizhi.hou@xxxxxxxxxx>
---
Documentation/fpga/index.rst | 1 +
Documentation/fpga/xrt.rst | 844 +++++++++++++++++++++++++++++++++++
2 files changed, 845 insertions(+)
create mode 100644 Documentation/fpga/xrt.rst

diff --git a/Documentation/fpga/index.rst b/Documentation/fpga/index.rst
index f80f95667ca2..30134357b70d 100644
--- a/Documentation/fpga/index.rst
+++ b/Documentation/fpga/index.rst
@@ -8,6 +8,7 @@ fpga
:maxdepth: 1
dfl
+ xrt
.. only:: subproject and html
diff --git a/Documentation/fpga/xrt.rst b/Documentation/fpga/xrt.rst
new file mode 100644
index 000000000000..c9faad5f18c4
--- /dev/null
+++ b/Documentation/fpga/xrt.rst
@@ -0,0 +1,844 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+==================================
+XRTV2 Linux Kernel Driver Overview
+==================================
+
+Authors:
+
+* Sonal Santan <sonal.santan@xxxxxxxxxx>
+* Max Zhen <max.zhen@xxxxxxxxxx>
+* Lizhi Hou <lizhi.hou@xxxxxxxxxx>
+
+XRTV2 drivers are second generation `XRT <https://github.com/Xilinx/XRT>`_
+drivers which support `Alveo <https://www.xilinx.com/products/boards-and-kits/alveo.html>`_
+PCIe platforms from Xilinx.
+
+XRTV2 drivers support *subsystem* style data driven platforms where driver's
+configuration and behavior is determined by meta data provided by the platform
+(in *device tree* format). Primary management physical function (MPF) driver
+is called **xrt-mgnt**. Primary user physical function (UPF) driver is called
+**xrt-user** and is under development. xrt driver framework and HW subsystem
+drivers are packaged into a library module called **xrt-lib**, which is shared
+by **xrt-mgnt** and **xrt-user** (under development). The xrt driver framework
+implements a ``bus_type`` called **xrt_bus_type** which is used to discover HW

nice, good to see bus change. This is the only instance. will this be documented fuller later ?

+subsystems and facilitate inter HW subsystem interaction.
+
+Driver Modules
+==============
+
+xrt-lib.ko
+----------
+
+Repository of all subsystem drivers and pure software modules that can potentially
+be shared between xrt-mgnt and xrt-user. All these drivers are structured as
+**xrt_driver** and are instantiated by xrt-mgnt (or xrt-user under development)
+based on meta data associated with the hardware. The metadata is in the form of a
+device tree as mentioned before. Each xrt driver statically defines a subsystem
+node array by using node name or a string in its ``.endpoints`` property. And this
+array is eventually translated to IOMEM resources in the instantiated xrt device.
+
+The xrt-lib infrastructure provides hooks to xrt drivers for device node
+management, user file operations and ioctl callbacks. The core infrastructure also
+provides bus functionality for xrt driver registration, discovery and inter xrt
+driver leaf calls.
+
+.. note::
+ See code in ``include/xleaf.h`` and ``include/xdevice.h``
+
+
+xrt-mgnt.ko
+------------
+
+The xrt-mgnt driver is a PCIe device driver driving MPF found on Xilinx's Alveo
+PCIe device. It consists of one *root* driver, one or more *group* drivers
+and one or more *xleaf* drivers. The root and MPF specific xleaf drivers are
+in xrt-mgnt.ko. The group driver and other xleaf drivers are in xrt-lib.ko.
+
+The instantiation of specific group driver or xleaf driver is completely data
+driven based on meta data (mostly in device tree format) found through VSEC
+capability and inside firmware files, such as platform xsabin or user xclbin file.
+The root driver manages the life cycle of multiple group drivers, which, in turn,
+manages multiple xleaf drivers. This allows a single set of drivers to support
+all kinds of subsystems exposed by different shells. The difference among all
+these subsystems will be handled in xleaf drivers with root and group drivers
+being part of the infrastructure and provide common services for all leaves
+found on all platforms.
+
+The driver object model looks like the following::
+
+ +-----------+
+ | xroot |
+ +-----+-----+
+ |
+ +-----------+-----------+
+ | |
+ v v
+ +-----------+ +-----------+
+ | group | ... | group |
+ +-----+-----+ +------+----+
+ | |
+ | |
+ +-----+----+ +-----+----+
+ | | | |
+ v v v v
+ +-------+ +-------+ +-------+ +-------+
+ | xleaf |..| xleaf | | xleaf |..| xleaf |
+ +-------+ +-------+ +-------+ +-------+
+
+As an example for Xilinx Alveo U50 before user xclbin download, the tree
+looks like the following::
+
+ +-----------+
+ | xrt-mgnt |
+ +-----+-----+
+ |
+ +-------------------------+--------------------+
+ | | |
+ v v v
+ +--------+ +--------+ +--------+
+ | group0 | | group1 | | group2 |
+ +----+---+ +----+---+ +---+----+
+ | | |
+ | | |
+ +-----+-----+ +----+-----+---+ +-----+-----+----+--------+
+ | | | | | | | | |
+ v v | v v | v v |
+ +------------+ +------+ | +------+ +------+ | +------+ +-----------+ |
+ | xmgnt_main | | VSEC | | | GPIO | | QSPI | | | CMC | | AXI-GATE0 | |
+ +------------+ +------+ | +------+ +------+ | +------+ +-----------+ |
+ | +---------+ | +------+ +-----------+ |
+ +>| MAILBOX | +->| ICAP | | AXI-GATE1 |<+
+ +---------+ | +------+ +-----------+
+ | +-------+
+ +->| CALIB |
+ +-------+
+
+After an xclbin is downloaded, group3 will be added and the tree looks like the
+following::
+
+ +-----------+
+ | xrt-mgnt |
+ +-----+-----+
+ |
+ +-------------------------+--------------------+-----------------+
+ | | | |
+ v v v |
+ +--------+ +--------+ +--------+ |
+ | group0 | | group1 | | group2 | |
+ +----+---+ +----+---+ +---+----+ |
+ | | | |
+ | | | |
+ +-----+-----+ +-----+-----+---+ +-----+-----+----+--------+ |
+ | | | | | | | | | |
+ v v | v v | v v | |
+ +------------+ +------+ | +------+ +------+ | +------+ +-----------+ | |
+ | xmgnt_main | | VSEC | | | GPIO | | QSPI | | | CMC | | AXI-GATE0 | | |
+ +------------+ +------+ | +------+ +------+ | +------+ +-----------+ | |
+ | +---------+ | +------+ +-----------+ | |
+ +>| MAILBOX | +->| ICAP | | AXI-GATE1 |<+ |
+ +---------+ | +------+ +-----------+ |
+ | +-------+ |
+ +->| CALIB | |
+ +-------+ |
+ +---+----+ |
+ | group3 |<--------------------------------------------+
+ +--------+
+ |
+ |
+ +-------+--------+---+--+--------+------+-------+
+ | | | | | | |
+ v | v | v | v
+ +--------+ | +--------+ | +--------+ | +-----+
+ | CLOCK0 | | | CLOCK1 | | | CLOCK2 | | | UCS |
+ +--------+ v +--------+ v +--------+ v +-----+
+ +-------------+ +-------------+ +-------------+
+ | CLOCK-FREQ0 | | CLOCK-FREQ1 | | CLOCK-FREQ2 |
+ +-------------+ +-------------+ +-------------+
+
+
+root
+^^^^
+
+The root driver is a PCIe device driver attached to MPF. It's part of the
+infrastructure of the MPF driver and resides in xrt-mgnt.ko. This driver
+
+* manages one or more group drivers
+* provides access to functionalities that requires pci_dev, such as PCIE config
+ space access, to other xleaf drivers through root calls
+* facilities event callbacks for other xleaf drivers
+* facilities inter-leaf driver calls for other xleaf drivers
+
+When root driver starts, it will explicitly create an initial group instance,
+which contains xleaf drivers that will trigger the creation of other group
+instances. The root driver will wait for all group and leaves to be created
+before it returns from it's probe routine and claim success of the
+initialization of the entire xrt-mgnt driver. If any leaf fails to initialize
+the xrt-mgnt driver will still come online but with limited functionality.
+
+.. note::
+ See code in ``lib/xroot.c`` and ``mgnt/root.c``
+
+
+group
+^^^^^
+
+The group driver represents a pseudo device whose life cycle is managed by
+root and does not have real IO mem or IRQ resources. It's part of the
+infrastructure of the MPF driver and resides in xrt-lib.ko. This driver
+
+* manages one or more xleaf drivers
+* provides access to root from leaves, so that root calls, event notifications
+ and inter-leaf calls can happen
+
+In xrt-mgnt, an initial group driver instance will be created by the root. This
+instance contains leaves that will trigger group instances to be created to
+manage groups of leaves found on different partitions on hardware, such as
+VSEC, Shell, and User.
+
+Every *fpga_region* has a group object associated with it. The group is
+created when xclbin image is loaded on the fpga_region. The existing group
+is destroyed when a new xclbin image is loaded. The fpga_region persists
+across xclbin downloads.
+
+.. note::
+ See code in ``lib/group.c``
+
+
+xleaf
+^^^^^
+
+The xleaf driver is a xrt device driver whose life cycle is managed by
+a group driver and may or may not have real IO mem or IRQ resources. They
+are the real meat of xrt-mgnt and manage HW subsystems they are attached to.
+

+A xleaf driver may not have real hardware resources when it merely acts as a
+driver that manages certain in-memory states for xrt-mgnt. These in-memory
+states could be shared by multiple other leaves.
+
+Leaf drivers assigned to specific hardware resources drive specific subsystem in
+the device. To manipulate the subsystem or carry out a task, a xleaf driver may
+ask help from the root via root calls and/or from other leaves via inter-leaf
+calls.
+
+A xleaf can also broadcast events through infrastructure code for other leaves
+to process. It can also receive event notification from infrastructure about
+certain events, such as post-creation or pre-exit of a particular xleaf.
+
+.. note::
+ See code in ``lib/xleaf/*.c``
+
+
+FPGA Manager Interaction
+========================
+
+fpga_manager
+------------
+
+An instance of fpga_manager is created by xmgnt_main and is used for xclbin
+image download. fpga_manager requires the full xclbin image before it can
+start programming the FPGA configuration engine via Internal Configuration
+Access Port (ICAP) xrt driver.
+
+fpga_region
+-----------
+
+For every interface exposed by the currently loaded xclbin/xsabin in the
+*parent* fpga_region a new instance of fpga_region is created like a *child*
+fpga_region. The device tree of the *parent* fpga_region defines the
+resources for a new instance of fpga_bridge which isolates the parent from
+child fpga_region. This new instance of fpga_bridge will be used when a
+xclbin image is loaded on the child fpga_region. After the xclbin image is
+downloaded to the fpga_region, an instance of group is created for the
+fpga_region using the device tree obtained as part of the xclbin. If this
+device tree defines any child interfaces then it can trigger the creation of
+fpga_bridge and fpga_region for the next region in the chain.
+
+fpga_bridge
+-----------
+
+Like the fpga_region, matching fpga_bridge is also created by walking the
+device tree of the parent group.
+
+Driver Interfaces
+=================
+
+xrt-mgnt Driver Ioctls
+----------------------
+
+Ioctls exposed by xrt-mgnt driver to user space are enumerated in the following
+table:
+
+== ===================== ============================ ==========================
+# Functionality ioctl request code data format
+== ===================== ============================ ==========================
+1 FPGA image download XMGNT_IOCICAPDOWNLOAD_AXLF xmgnt_ioc_bitstream_axlf
+== ===================== ============================ ==========================
+
+A user xclbin can be downloaded by using the xbmgmt tool from the XRT open source
+suite. See example usage below::
+
+ xbmgmt partition --program --path /lib/firmware/xilinx/862c7020a250293e32036f19956669e5/test/verify.xclbin --force
+
+xrt-mgnt Driver Sysfs
+----------------------
+
+xrt-mgnt driver exposes a rich set of sysfs interfaces. Subsystem xrt
+drivers export sysfs node for every platform instance.
+
+Every partition also exports its UUIDs. See below for examples::
+
+ /sys/bus/pci/devices/0000:06:00.0/xmgnt_main.0/interface_uuids
+ /sys/bus/pci/devices/0000:06:00.0/xmgnt_main.0/logic_uuids
+
+
+hwmon
+-----
+
+xmgnt driver exposes standard hwmon interface to report voltage, current,

The xrt-mgmt

+temperature, power, etc. These can easily be viewed using *sensors* command
+line utility.
+
+Alveo Platform Overview
+=======================
+
+Alveo platforms are architected as two physical FPGA partitions: *Shell* and
+*User*. The Shell provides basic infrastructure for the Alveo platform like
+PCIe connectivity, board management, Dynamic Function Exchange (DFX), sensors,
+clocking, reset, and security. User partition contains user compiled FPGA

From v4, 'User' needs the article 'The' , so change to 'The User'

in both use of user, so also need a change of 'user' to 'the user'

+binary which is loaded by a process called DFX also known as partial
+reconfiguration.
+
+For DFX to work properly physical partitions require strict HW compatibility
+with each other. Every physical partition has two interface UUIDs: *parent* UUID
+and *child* UUID. For simple single stage platforms, Shell → User forms parent
+child relationship.
+
+.. note::
+ Partition compatibility matching is key design component of Alveo platforms

From v4, the article 'a' needs to preceed key. change 'is key' to 'is a key'

+ and XRT. Partitions have child and parent relationship. A loaded partition
+ exposes child partition UUID to advertise its compatibility requirement.When

From v4. A space must follow a '.' so change 'requirement.When' to requirement. When'

+ loading a child partition the xrt-mgnt management driver matches parent UUID of
+ the child partition against child UUID exported by the parent. Parent and
+ child partition UUIDs are stored in the *xclbin* (for user) or *xsabin* (for
+ shell). Except for root UUID exported by VSEC, hardware itself does not know
+ about UUIDs. UUIDs are stored in xsabin and xclbin. The image format has a
+ special node called Partition UUIDs which define the compatibility UUIDs. See
+ :ref:`partition_uuids`.
+
+
+The physical partitions and their loading is illustrated below::
+
+ SHELL USER
+ +-----------+ +-------------------+
+ | | | |
+ | VSEC UUID | CHILD PARENT | LOGIC UUID |
+ | o------->|<--------o |
+ | | UUID UUID | |
+ +-----+-----+ +--------+----------+
+ | |
+ . .
+ | |
+ +---+---+ +------+--------+
+ | POR | | USER COMPILED |
+ | FLASH | | XCLBIN |
+ +-------+ +---------------+
+
+
+Loading Sequence
+----------------
+
+The Shell partition is loaded from flash at system boot time. It establishes the
+PCIe link and exposes two physical functions to the BIOS. After the OS boots, xrt-mgnt

Please review the v4 comments for additions of 'the' and 'a' and comments above.

I will look for them again in v6

+driver attaches to the PCIe physical function 0 exposed by the Shell and then looks
+for VSEC in PCIe extended configuration space. Using VSEC it determines the logic
+UUID of Shell and uses the UUID to load matching *xsabin* file from Linux firmware
+directory. The xsabin file contains metadata to discover peripherals that are part
+of Shell and firmware(s) for any embedded soft processors in Shell. The xsabin file
+also contains Partition UUIDs as described here :ref:`partition_uuids`.
+
+The Shell exports a child interface UUID which is used for the compatibility check
+when loading user compiled xclbin over the User partition as part of DFX. When a user
+requests loading of a specific xclbin the xrt-mgnt management driver reads the parent

From v4, need a ',' to separate clauses.

From v4, drop 'management'

Tom

+interface UUID specified in the xclbin and matches it with child interface UUID
+exported by Shell to determine if xclbin is compatible with the Shell. If match
+fails loading of xclbin is denied.
+
+xclbin loading is requested using ICAP_DOWNLOAD_AXLF ioctl command. When loading
+xclbin, xrt-mgnt driver performs the following *logical* operations:
+
+1. Copy xclbin from user to kernel memory
+2. Sanity check the xclbin contents
+3. Isolate the User partition
+4. Download the bitstream using the FPGA config engine (ICAP)
+5. De-isolate the User partition
+6. Program the clocks (ClockWiz) driving the User partition
+7. Wait for memory controller (MIG) calibration
+8. Return the loading status back to the caller
+
+`Platform Loading Overview <https://xilinx.github.io/XRT/master/html/platforms_partitions.html>`_
+provides more detailed information on platform loading.
+
+
+xsabin
+------
+
+Each Alveo platform comes packaged with its own xsabin. The xsabin is a trusted
+component of the platform. For format details refer to :ref:`xsabin_xclbin_container_format`
+below. xsabin contains basic information like UUIDs, platform name and metadata in the
+form of device tree. See :ref:`device_tree_usage` below for details and example.
+
+xclbin
+------
+
+xclbin is compiled by end user using
+`Vitis <https://www.xilinx.com/products/design-tools/vitis/vitis-platform.html>`_
+tool set from Xilinx. The xclbin contains sections describing user compiled
+acceleration engines/kernels, memory subsystems, clocking information etc. It also
+contains FPGA bitstream for the user partition, UUIDs, platform name, etc.
+
+
+.. _xsabin_xclbin_container_format:
+
+xsabin/xclbin Container Format
+------------------------------
+
+xclbin/xsabin is ELF-like binary container format. It is structured as series of
+sections. There is a file header followed by several section headers which is
+followed by sections. A section header points to an actual section. There is an
+optional signature at the end. The format is defined by header file ``xclbin.h``.
+The following figure illustrates a typical xclbin::
+
+
+ +---------------------+
+ | |
+ | HEADER |
+ +---------------------+
+ | SECTION HEADER |
+ | |
+ +---------------------+
+ | ... |
+ | |
+ +---------------------+
+ | SECTION HEADER |
+ | |
+ +---------------------+
+ | SECTION |
+ | |
+ +---------------------+
+ | ... |
+ | |
+ +---------------------+
+ | SECTION |
+ | |
+ +---------------------+
+ | SIGNATURE |
+ | (OPTIONAL) |
+ +---------------------+
+
+
+xclbin/xsabin files can be packaged, un-packaged and inspected using XRT utility
+called **xclbinutil**. xclbinutil is part of XRT open source software stack. The
+source code for xclbinutil can be found at
+https://github.com/Xilinx/XRT/tree/master/src/runtime_src/tools/xclbinutil
+
+For example to enumerate the contents of a xclbin/xsabin use the *--info* switch
+as shown below::
+
+
+ xclbinutil --info --input /opt/xilinx/firmware/u50/gen3x16-xdma/blp/test/bandwidth.xclbin
+ xclbinutil --info --input /lib/firmware/xilinx/862c7020a250293e32036f19956669e5/partition.xsabin
+
+
+.. _device_tree_usage:
+
+Device Tree Usage
+-----------------
+
+As mentioned previously xsabin file stores metadata which advertise HW subsystems present
+in a partition. The metadata is stored in device tree format with a well defined schema.
+XRT management driver uses this information to bind *xrt drivers* to the subsystem
+instantiations. The xrt drivers are found in **xrt-lib.ko** kernel module defined
+earlier.
+
+Logic UUID
+^^^^^^^^^^
+A partition is identified uniquely through ``logic_uuid`` property::
+
+ /dts-v1/;
+ / {
+ logic_uuid = "0123456789abcdef0123456789abcdef";
+ ...
+ }
+
+Schema Version
+^^^^^^^^^^^^^^
+Schema version is defined through ``schema_version`` node. And it contains ``major``
+and ``minor`` properties as below::
+
+ /dts-v1/;
+ / {
+ schema_version {
+ major = <0x01>;
+ minor = <0x00>;
+ };
+ ...
+ }
+
+.. _partition_uuids:
+
+Partition UUIDs
+^^^^^^^^^^^^^^^
+As mentioned earlier, each partition may have parent and child UUIDs. These UUIDs are
+defined by ``interfaces`` node and ``interface_uuid`` property::
+
+ /dts-v1/;
+ / {
+ interfaces {
+ @0 {
+ interface_uuid = "0123456789abcdef0123456789abcdef";
+ };
+ @1 {
+ interface_uuid = "fedcba9876543210fedcba9876543210";
+ };
+ ...
+ };
+ ...
+ }
+
+
+Subsystem Instantiations
+^^^^^^^^^^^^^^^^^^^^^^^^
+Subsystem instantiations are captured as children of ``addressable_endpoints``
+node::
+
+ /dts-v1/;
+ / {
+ addressable_endpoints {
+ abc {
+ ...
+ };
+ def {
+ ...
+ };
+ ...
+ }
+ }
+
+Subnode 'abc' and 'def' are the name of subsystem nodes
+
+Subsystem Node
+^^^^^^^^^^^^^^
+Each subsystem node and its properties define a hardware instance::
+
+
+ addressable_endpoints {
+ abc {
+ reg = <0xa 0xb>
+ pcie_physical_function = <0x0>;
+ pcie_bar_mapping = <0x2>;
+ compatible = "abc def";
+ firmware {
+ firmware_product_name = "abc"
+ firmware_branch_name = "def"
+ firmware_version_major = <1>
+ firmware_version_minor = <2>
+ };
+ }
+ ...
+ }
+
+:reg:
+ Property defines address range. '<0xa 0xb>' is BAR offset and length pair, both
+ are 64-bit integer.
+:pcie_physical_function:
+ Property specifies which PCIe physical function the subsystem node resides.
+:pcie_bar_mapping:
+ Property specifies which PCIe BAR the subsystem node resides. '<0x2>' is BAR
+ index and it is 0 if this property is not defined.
+:compatible:
+ Property is a list of strings. The first string in the list specifies the exact
+ subsystem node. The following strings represent other devices that the device
+ is compatible with.
+:firmware:
+ Subnode defines the firmware required by this subsystem node.
+
+Alveo U50 Platform Example
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+::
+
+ /dts-v1/;
+
+ /{
+ logic_uuid = "f465b0a3ae8c64f619bc150384ace69b";
+
+ schema_version {
+ major = <0x01>;
+ minor = <0x00>;
+ };
+
+ interfaces {
+
+ @0 {
+ interface_uuid = "862c7020a250293e32036f19956669e5";
+ };
+ };
+
+ addressable_endpoints {
+
+ ep_blp_rom_00 {
+ reg = <0x00 0x1f04000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_bram_ctrl-1.0\0axi_bram_ctrl";
+ };
+
+ ep_card_flash_program_00 {
+ reg = <0x00 0x1f06000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_quad_spi-1.0\0axi_quad_spi";
+ interrupts = <0x03 0x03>;
+ };
+
+ ep_cmc_firmware_mem_00 {
+ reg = <0x00 0x1e20000 0x00 0x20000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_bram_ctrl-1.0\0axi_bram_ctrl";
+
+ firmware {
+ firmware_product_name = "cmc";
+ firmware_branch_name = "u50";
+ firmware_version_major = <0x01>;
+ firmware_version_minor = <0x00>;
+ };
+ };
+
+ ep_cmc_intc_00 {
+ reg = <0x00 0x1e03000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_intc-1.0\0axi_intc";
+ interrupts = <0x04 0x04>;
+ };
+
+ ep_cmc_mutex_00 {
+ reg = <0x00 0x1e02000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_cmc_regmap_00 {
+ reg = <0x00 0x1e08000 0x00 0x2000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_bram_ctrl-1.0\0axi_bram_ctrl";
+
+ firmware {
+ firmware_product_name = "sc-fw";
+ firmware_branch_name = "u50";
+ firmware_version_major = <0x05>;
+ };
+ };
+
+ ep_cmc_reset_00 {
+ reg = <0x00 0x1e01000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_ddr_mem_calib_00 {
+ reg = <0x00 0x63000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_debug_bscan_mgmt_00 {
+ reg = <0x00 0x1e90000 0x00 0x10000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-debug_bridge-1.0\0debug_bridge";
+ };
+
+ ep_ert_base_address_00 {
+ reg = <0x00 0x21000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_ert_command_queue_mgmt_00 {
+ reg = <0x00 0x40000 0x00 0x10000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-ert_command_queue-1.0\0ert_command_queue";
+ };
+
+ ep_ert_command_queue_user_00 {
+ reg = <0x00 0x40000 0x00 0x10000>;
+ pcie_physical_function = <0x01>;
+ compatible = "xilinx.com,reg_abs-ert_command_queue-1.0\0ert_command_queue";
+ };
+
+ ep_ert_firmware_mem_00 {
+ reg = <0x00 0x30000 0x00 0x8000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_bram_ctrl-1.0\0axi_bram_ctrl";
+
+ firmware {
+ firmware_product_name = "ert";
+ firmware_branch_name = "v20";
+ firmware_version_major = <0x01>;
+ };
+ };
+
+ ep_ert_intc_00 {
+ reg = <0x00 0x23000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_intc-1.0\0axi_intc";
+ interrupts = <0x05 0x05>;
+ };
+
+ ep_ert_reset_00 {
+ reg = <0x00 0x22000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_ert_sched_00 {
+ reg = <0x00 0x50000 0x00 0x1000>;
+ pcie_physical_function = <0x01>;
+ compatible = "xilinx.com,reg_abs-ert_sched-1.0\0ert_sched";
+ interrupts = <0x09 0x0c>;
+ };
+
+ ep_fpga_configuration_00 {
+ reg = <0x00 0x1e88000 0x00 0x8000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_hwicap-1.0\0axi_hwicap";
+ interrupts = <0x02 0x02>;
+ };
+
+ ep_icap_reset_00 {
+ reg = <0x00 0x1f07000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_msix_00 {
+ reg = <0x00 0x00 0x00 0x20000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-msix-1.0\0msix";
+ pcie_bar_mapping = <0x02>;
+ };
+
+ ep_pcie_link_mon_00 {
+ reg = <0x00 0x1f05000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_pr_isolate_plp_00 {
+ reg = <0x00 0x1f01000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_pr_isolate_ulp_00 {
+ reg = <0x00 0x1000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_gpio-1.0\0axi_gpio";
+ };
+
+ ep_uuid_rom_00 {
+ reg = <0x00 0x64000 0x00 0x1000>;
+ pcie_physical_function = <0x00>;
+ compatible = "xilinx.com,reg_abs-axi_bram_ctrl-1.0\0axi_bram_ctrl";
+ };
+
+ ep_xdma_00 {
+ reg = <0x00 0x00 0x00 0x10000>;
+ pcie_physical_function = <0x01>;
+ compatible = "xilinx.com,reg_abs-xdma-1.0\0xdma";
+ pcie_bar_mapping = <0x02>;
+ };
+ };
+
+ }
+
+
+
+Deployment Models
+=================
+
+Baremetal
+---------
+
+In bare-metal deployments, both MPF and UPF are visible and accessible. xrt-mgnt
+driver binds to MPF. xrt-mgnt driver operations are privileged and available to
+system administrator. The full stack is illustrated below::
+
+ HOST
+
+ [XRT-MGNT] [XRT-USER]
+ | |
+ | |
+ +-----+ +-----+
+ | MPF | | UPF |
+ | | | |
+ | PF0 | | PF1 |
+ +--+--+ +--+--+
+ ......... ^................. ^..........
+ | |
+ | PCIe DEVICE |
+ | |
+ +--+------------------+--+
+ | SHELL |
+ | |
+ +------------------------+
+ | USER |
+ | |
+ | |
+ | |
+ | |
+ +------------------------+
+
+
+
+Virtualized
+-----------
+
+In virtualized deployments, privileged MPF is assigned to host but unprivileged
+UPF is assigned to guest VM via PCIe pass-through. xrt-mgnt driver in host binds
+to MPF. xrt-mgnt driver operations are privileged and only accessible to the MPF.
+The full stack is illustrated below::
+
+
+ ..............
+ HOST . VM .
+ . .
+ [XRT-MGNT] . [XRT-USER] .
+ | . | .
+ | . | .
+ +-----+ . +-----+ .
+ | MPF | . | UPF | .
+ | | . | | .
+ | PF0 | . | PF1 | .
+ +--+--+ . +--+--+ .
+ ......... ^................. ^..........
+ | |
+ | PCIe DEVICE |
+ | |
+ +--+------------------+--+
+ | SHELL |
+ | |
+ +------------------------+
+ | USER |
+ | |
+ | |
+ | |
+ | |
+ +------------------------+
+
+
+
+
+
+Platform Security Considerations
+================================
+
+`Security of Alveo Platform <https://xilinx.github.io/XRT/master/html/security.html>`_
+discusses the deployment options and security implications in great detail.

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