-.. BSD LICENSE
- Copyright (c) 2015, Cisco Systems, Inc.
+.. SPDX-License-Identifier: BSD-3-Clause
+ Copyright (c) 2017, Cisco Systems, Inc.
All rights reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in
- the documentation and/or other materials provided with the
- distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE.
-
ENIC Poll Mode Driver
=====================
or would like to run DPDK software applications on Cisco UCS servers using
Cisco VIC adapters the following documentation is relevant.
-Version Information
--------------------
-
-The version of the ENIC PMD driver is 1.0.0.6 and will be printed by ENIC PMD
-during the initialization.
-
How to obtain ENIC PMD integrated DPDK
--------------------------------------
- **CONFIG_RTE_LIBRTE_ENIC_PMD** (default y): Enables or disables inclusion
of the ENIC PMD driver in the DPDK compilation.
- - **CONFIG_RTE_LIBRTE_ENIC_DEBUG** (default n): Enables or disables debug
- logging within the ENIC PMD driver.
-
- **vNIC Configuration Parameters**
- **Number of Queues**
- The maximum number of receive and transmit queues are configurable on a per
- vNIC basis through the Cisco UCS Manager (CIMC or UCSM). These values
- should be configured to be greater than or equal to the nb_rx_q and nb_tx_q
- parameters expected to used in the call to the rte_eth_dev_configure()
- function.
+ The maximum number of receive queues (RQs), work queues (WQs) and
+ completion queues (CQs) are configurable on a per vNIC basis
+ through the Cisco UCS Manager (CIMC or UCSM).
+
+ These values should be configured as follows:
+
+ - The number of WQs should be greater or equal to the value of the
+ expected nb_tx_q parameter in the call to
+ rte_eth_dev_configure()
+
+ - The number of RQs configured in the vNIC should be greater or
+ equal to *twice* the value of the expected nb_rx_q parameter in
+ the call to rte_eth_dev_configure(). With the addition of Rx
+ scatter, a pair of RQs on the vnic is needed for each receive
+ queue used by DPDK, even if Rx scatter is not being used.
+ Having a vNIC with only 1 RQ is not a valid configuration, and
+ will fail with an error message.
+
+ - The number of CQs should set so that there is one CQ for each
+ WQ, and one CQ for each pair of RQs.
+
+ For example: If the application requires 3 Rx queues, and 3 Tx
+ queues, the vNIC should be configured to have at least 3 WQs, 6
+ RQs (3 pairs), and 6 CQs (3 for use by WQs + 3 for use by the 3
+ pairs of RQs).
- **Size of Queues**
Likewise, the number of receive and transmit descriptors are configurable on
- a per vNIC bases via the UCS Manager and should be greater than or equal to
+ a per-vNIC basis via the UCS Manager and should be greater than or equal to
the nb_rx_desc and nb_tx_desc parameters expected to be used in the calls
to rte_eth_rx_queue_setup() and rte_eth_tx_queue_setup() respectively.
+ An application requesting more than the set size will be limited to that
+ size.
+
+ Unless there is a lack of resources due to creating many vNICs, it
+ is recommended that the WQ and RQ sizes be set to the maximum. This
+ gives the application the greatest amount of flexibility in its
+ queue configuration.
+
+ - *Note*: Since the introduction of Rx scatter, for performance
+ reasons, this PMD uses two RQs on the vNIC per receive queue in
+ DPDK. One RQ holds descriptors for the start of a packet, and the
+ second RQ holds the descriptors for the rest of the fragments of
+ a packet. This means that the nb_rx_desc parameter to
+ rte_eth_rx_queue_setup() can be a greater than 4096. The exact
+ amount will depend on the size of the mbufs being used for
+ receives, and the MTU size.
+
+ For example: If the mbuf size is 2048, and the MTU is 9000, then
+ receiving a full size packet will take 5 descriptors, 1 from the
+ start-of-packet queue, and 4 from the second queue. Assuming
+ that the RQ size was set to the maximum of 4096, then the
+ application can specify up to 1024 + 4096 as the nb_rx_desc
+ parameter to rte_eth_rx_queue_setup().
- **Interrupts**
- Only one interrupt per vNIC interface should be configured in the UCS
+ At least one interrupt per vNIC interface should be configured in the UCS
manager regardless of the number receive/transmit queues. The ENIC PMD
- uses this interrupt to get information about errors in the fast path.
+ uses this interrupt to get information about link status and errors
+ in the fast path.
+
+ In addition to the interrupt for link status and errors, when using Rx queue
+ interrupts, increase the number of configured interrupts so that there is at
+ least one interrupt for each Rx queue. For example, if the app uses 3 Rx
+ queues and wants to use per-queue interrupts, configure 4 (3 + 1) interrupts.
+
+ - **Receive Side Scaling**
+
+ In order to fully utilize RSS in DPDK, enable all RSS related settings in
+ CIMC or UCSM. These include the following items listed under
+ Receive Side Scaling:
+ TCP, IPv4, TCP-IPv4, IPv6, TCP-IPv6, IPv6 Extension, TCP-IPv6 Extension.
+
+
+.. _enic-flow-director:
+
+Flow director support
+---------------------
+
+Advanced filtering support was added to 1300 series VIC firmware starting
+with version 2.0.13 for C-series UCS servers and version 3.1.2 for UCSM
+managed blade servers. In order to enable advanced filtering the 'Advanced
+filter' radio button should be enabled via CIMC or UCSM followed by a reboot
+of the server.
+
+With advanced filters, perfect matching of all fields of IPv4, IPv6 headers
+as well as TCP, UDP and SCTP L4 headers is available through flow director.
+Masking of these fields for partial match is also supported.
+
+Without advanced filter support, the flow director is limited to IPv4
+perfect filtering of the 5-tuple with no masking of fields supported.
+
+SR-IOV mode utilization
+-----------------------
+
+UCS blade servers configured with dynamic vNIC connection policies in UCSM
+are capable of supporting SR-IOV. SR-IOV virtual functions (VFs) are
+specialized vNICs, distinct from regular Ethernet vNICs. These VFs can be
+directly assigned to virtual machines (VMs) as 'passthrough' devices.
+
+In UCS, SR-IOV VFs require the use of the Cisco Virtual Machine Fabric Extender
+(VM-FEX), which gives the VM a dedicated
+interface on the Fabric Interconnect (FI). Layer 2 switching is done at
+the FI. This may eliminate the requirement for software switching on the
+host to route intra-host VM traffic.
+
+Please refer to `Creating a Dynamic vNIC Connection Policy
+<http://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/sw/vm_fex/vmware/gui/config_guide/b_GUI_VMware_VM-FEX_UCSM_Configuration_Guide/b_GUI_VMware_VM-FEX_UCSM_Configuration_Guide_chapter_010.html#task_433E01651F69464783A68E66DA8A47A5>`_
+for information on configuring SR-IOV adapter policies and port profiles
+using UCSM.
+
+Once the policies are in place and the host OS is rebooted, VFs should be
+visible on the host, E.g.:
+
+.. code-block:: console
+
+ # lspci | grep Cisco | grep Ethernet
+ 0d:00.0 Ethernet controller: Cisco Systems Inc VIC Ethernet NIC (rev a2)
+ 0d:00.1 Ethernet controller: Cisco Systems Inc VIC SR-IOV VF (rev a2)
+ 0d:00.2 Ethernet controller: Cisco Systems Inc VIC SR-IOV VF (rev a2)
+ 0d:00.3 Ethernet controller: Cisco Systems Inc VIC SR-IOV VF (rev a2)
+ 0d:00.4 Ethernet controller: Cisco Systems Inc VIC SR-IOV VF (rev a2)
+ 0d:00.5 Ethernet controller: Cisco Systems Inc VIC SR-IOV VF (rev a2)
+ 0d:00.6 Ethernet controller: Cisco Systems Inc VIC SR-IOV VF (rev a2)
+ 0d:00.7 Ethernet controller: Cisco Systems Inc VIC SR-IOV VF (rev a2)
+
+Enable Intel IOMMU on the host and install KVM and libvirt, and reboot again as
+required. Then, using libvirt, create a VM instance with an assigned device.
+Below is an example ``interface`` block (part of the domain configuration XML)
+that adds the host VF 0d:00:01 to the VM. ``profileid='pp-vlan-25'`` indicates
+the port profile that has been configured in UCSM.
+
+.. code-block:: console
+
+ <interface type='hostdev' managed='yes'>
+ <mac address='52:54:00:ac:ff:b6'/>
+ <driver name='vfio'/>
+ <source>
+ <address type='pci' domain='0x0000' bus='0x0d' slot='0x00' function='0x1'/>
+ </source>
+ <virtualport type='802.1Qbh'>
+ <parameters profileid='pp-vlan-25'/>
+ </virtualport>
+ </interface>
+
+
+Alternatively, the configuration can be done in a separate file using the
+``network`` keyword. These methods are described in the libvirt documentation for
+`Network XML format <https://libvirt.org/formatnetwork.html>`_.
+
+When the VM instance is started, libvirt will bind the host VF to
+vfio, complete provisioning on the FI and bring up the link.
+
+.. note::
+
+ It is not possible to use a VF directly from the host because it is not
+ fully provisioned until libvirt brings up the VM that it is assigned
+ to.
+
+In the VM instance, the VF will now be visible. E.g., here the VF 00:04.0 is
+seen on the VM instance and should be available for binding to a DPDK.
+
+.. code-block:: console
+
+ # lspci | grep Ether
+ 00:04.0 Ethernet controller: Cisco Systems Inc VIC SR-IOV VF (rev a2)
+
+Follow the normal DPDK install procedure, binding the VF to either ``igb_uio``
+or ``vfio`` in non-IOMMU mode.
+
+In the VM, the kernel enic driver may be automatically bound to the VF during
+boot. Unbinding it currently hangs due to a known issue with the driver. To
+work around the issue, blacklist the enic module as follows.
+Please see :ref:`Limitations <enic_limitations>` for limitations in
+the use of SR-IOV.
+
+.. code-block:: console
+
+ # cat /etc/modprobe.d/enic.conf
+ blacklist enic
+
+ # dracut --force
+
+.. note::
+
+ Passthrough does not require SR-IOV. If VM-FEX is not desired, the user
+ may create as many regular vNICs as necessary and assign them to VMs as
+ passthrough devices. Since these vNICs are not SR-IOV VFs, using them as
+ passthrough devices do not require libvirt, port profiles, and VM-FEX.
+
+
+.. _enic-genic-flow-api:
+
+Generic Flow API support
+------------------------
+
+Generic Flow API is supported. The baseline support is:
+
+- **1200 series VICs**
+
+ 5-tuple exact flow support for 1200 series adapters. This allows:
+
+ - Attributes: ingress
+ - Items: ipv4, ipv6, udp, tcp (must exactly match src/dst IP
+ addresses and ports and all must be specified)
+ - Actions: queue and void
+ - Selectors: 'is'
+
+- **1300 and later series VICS with advanced filters disabled**
+
+ With advanced filters disabled, an IPv4 or IPv6 item must be specified
+ in the pattern.
+
+ - Attributes: ingress
+ - Items: eth, ipv4, ipv6, udp, tcp, vxlan, inner eth, ipv4, ipv6, udp, tcp
+ - Actions: queue and void
+ - Selectors: 'is', 'spec' and 'mask'. 'last' is not supported
+ - In total, up to 64 bytes of mask is allowed across all headers
+
+- **1300 and later series VICS with advanced filters enabled**
+
+ - Attributes: ingress
+ - Items: eth, ipv4, ipv6, udp, tcp, vxlan, inner eth, ipv4, ipv6, udp, tcp
+ - Actions: queue, mark, drop, flag and void
+ - Selectors: 'is', 'spec' and 'mask'. 'last' is not supported
+ - In total, up to 64 bytes of mask is allowed across all headers
+
+- **1400 and later series VICS with advanced filters enabled**
+
+ All the above plus:
+
+ - Action: count
+
+More features may be added in future firmware and new versions of the VIC.
+Please refer to the release notes.
+
+.. _overlay_offload:
+
+Overlay Offload
+---------------
+
+Recent hardware models support overlay offload. When enabled, the NIC performs
+the following operations for VXLAN, NVGRE, and GENEVE packets. In all cases,
+inner and outer packets can be IPv4 or IPv6.
+
+- TSO for VXLAN and GENEVE packets.
+
+ Hardware supports NVGRE TSO, but DPDK currently has no NVGRE offload flags.
+
+- Tx checksum offloads.
+
+ The NIC fills in IPv4/UDP/TCP checksums for both inner and outer packets.
+
+- Rx checksum offloads.
+
+ The NIC validates IPv4/UDP/TCP checksums of both inner and outer packets.
+ Good checksum flags (e.g. ``PKT_RX_L4_CKSUM_GOOD``) indicate that the inner
+ packet has the correct checksum, and if applicable, the outer packet also
+ has the correct checksum. Bad checksum flags (e.g. ``PKT_RX_L4_CKSUM_BAD``)
+ indicate that the inner and/or outer packets have invalid checksum values.
+
+- Inner Rx packet type classification
+
+ PMD sets inner L3/L4 packet types (e.g. ``RTE_PTYPE_INNER_L4_TCP``), and
+ ``RTE_PTYPE_TUNNEL_GRENAT`` to indicate that the packet is tunneled.
+ PMD does not set L3/L4 packet types for outer packets.
+
+- Inner RSS
+
+ RSS hash calculation, therefore queue selection, is done on inner packets.
+
+In order to enable overlay offload, the 'Enable VXLAN' box should be checked
+via CIMC or UCSM followed by a reboot of the server. When PMD successfully
+enables overlay offload, it prints the following message on the console.
+
+.. code-block:: console
+
+ Overlay offload is enabled
+
+By default, PMD enables overlay offload if hardware supports it. To disable
+it, set ``devargs`` parameter ``disable-overlay=1``. For example::
+
+ -w 12:00.0,disable-overlay=1
+
+By default, the NIC uses 4789 as the VXLAN port. The user may change
+it through ``rte_eth_dev_udp_tunnel_port_{add,delete}``. However, as
+the current NIC has a single VXLAN port number, the user cannot
+configure multiple port numbers.
+
+Ingress VLAN Rewrite
+--------------------
+
+VIC adapters can tag, untag, or modify the VLAN headers of ingress
+packets. The ingress VLAN rewrite mode controls this behavior. By
+default, it is set to pass-through, where the NIC does not modify the
+VLAN header in any way so that the application can see the original
+header. This mode is sufficient for many applications, but may not be
+suitable for others. Such applications may change the mode by setting
+``devargs`` parameter ``ig-vlan-rewrite`` to one of the following.
+
+- ``pass``: Pass-through mode. The NIC does not modify the VLAN
+ header. This is the default mode.
+
+- ``priority``: Priority-tag default VLAN mode. If the ingress packet
+ is tagged with the default VLAN, the NIC replaces its VLAN header
+ with the priority tag (VLAN ID 0).
+
+- ``trunk``: Default trunk mode. The NIC tags untagged ingress packets
+ with the default VLAN. Tagged ingress packets are not modified. To
+ the application, every packet appears as tagged.
+
+- ``untag``: Untag default VLAN mode. If the ingress packet is tagged
+ with the default VLAN, the NIC removes or untags its VLAN header so
+ that the application sees an untagged packet. As a result, the
+ default VLAN becomes `untagged`. This mode can be useful for
+ applications such as OVS-DPDK performance benchmarks that utilize
+ only the default VLAN and want to see only untagged packets.
+
+
+Vectorized Rx Handler
+---------------------
+
+ENIC PMD includes a version of the receive handler that is vectorized using
+AVX2 SIMD instructions. It is meant for bulk, throughput oriented workloads
+where reducing cycles/packet in PMD is a priority. In order to use the
+vectorized handler, take the following steps.
+
+- Use a recent version of gcc, icc, or clang and build 64-bit DPDK. If
+ the compiler is known to support AVX2, DPDK build system
+ automatically compiles the vectorized handler. Otherwise, the
+ handler is not available.
+
+- Set ``devargs`` parameter ``enable-avx2-rx=1`` to explicitly request that
+ PMD consider the vectorized handler when selecting the receive handler.
+ For example::
+
+ -w 12:00.0,enable-avx2-rx=1
+
+ As the current implementation is intended for field trials, by default, the
+ vectorized handler is not considered (``enable-avx2-rx=0``).
+
+- Run on a UCS M4 or later server with CPUs that support AVX2.
+
+PMD selects the vectorized handler when the handler is compiled into
+the driver, the user requests its use via ``enable-avx2-rx=1``, CPU
+supports AVX2, and scatter Rx is not used. To verify that the
+vectorized handler is selected, enable debug logging
+(``--log-level=pmd,debug``) and check the following message.
+
+.. code-block:: console
+
+ enic_use_vector_rx_handler use the non-scatter avx2 Rx handler
+
+.. _enic_limitations:
Limitations
-----------
In test setups where an Ethernet port of a Cisco adapter in TRUNK mode is
connected point-to-point to another adapter port or connected though a router
instead of a switch, all ingress packets will be VLAN tagged. Programs such
- as l3fwd which do not account for VLAN tags in packets will misbehave. The
- solution is to enable VLAN stripping on ingress. The follow code fragment is
- example of how to accomplish this:
+ as l3fwd may not account for VLAN tags in packets and may misbehave. One
+ solution is to enable VLAN stripping on ingress so the VLAN tag is removed
+ from the packet and put into the mbuf->vlan_tci field. Here is an example
+ of how to accomplish this:
.. code-block:: console
vlan_offload |= ETH_VLAN_STRIP_OFFLOAD;
rte_eth_dev_set_vlan_offload(port, vlan_offload);
-How to build the suite?
------------------------
+Another alternative is modify the adapter's ingress VLAN rewrite mode so that
+packets with the default VLAN tag are stripped by the adapter and presented to
+DPDK as untagged packets. In this case mbuf->vlan_tci and the PKT_RX_VLAN and
+PKT_RX_VLAN_STRIPPED mbuf flags would not be set. This mode is enabled with the
+``devargs`` parameter ``ig-vlan-rewrite=untag``. For example::
+
+ -w 12:00.0,ig-vlan-rewrite=untag
+
+- Limited flow director support on 1200 series and 1300 series Cisco VIC
+ adapters with old firmware. Please see :ref:`enic-flow-director`.
+
+- Flow director features are not supported on generation 1 Cisco VIC adapters
+ (M81KR and P81E)
+
+- **SR-IOV**
+
+ - KVM hypervisor support only. VMware has not been tested.
+ - Requires VM-FEX, and so is only available on UCS managed servers connected
+ to Fabric Interconnects. It is not on standalone C-Series servers.
+ - VF devices are not usable directly from the host. They can only be used
+ as assigned devices on VM instances.
+ - Currently, unbind of the ENIC kernel mode driver 'enic.ko' on the VM
+ instance may hang. As a workaround, enic.ko should be blacklisted or removed
+ from the boot process.
+ - pci_generic cannot be used as the uio module in the VM. igb_uio or
+ vfio in non-IOMMU mode can be used.
+ - The number of RQs in UCSM dynamic vNIC configurations must be at least 2.
+ - The number of SR-IOV devices is limited to 256. Components on target system
+ might limit this number to fewer than 256.
+
+- **Flow API**
+
+ - The number of filters that can be specified with the Generic Flow API is
+ dependent on how many header fields are being masked. Use 'flow create' in
+ a loop to determine how many filters your VIC will support (not more than
+ 1000 for 1300 series VICs). Filters are checked for matching in the order they
+ were added. Since there currently is no grouping or priority support,
+ 'catch-all' filters should be added last.
+
+- **Statistics**
+
+ - ``rx_good_bytes`` (ibytes) always includes VLAN header (4B) and CRC bytes (4B).
+ This behavior applies to 1300 and older series VIC adapters.
+ 1400 series VICs do not count CRC bytes, and count VLAN header only when VLAN
+ stripping is disabled.
+ - When the NIC drops a packet because the Rx queue has no free buffers,
+ ``rx_good_bytes`` still increments by 4B if the packet is not VLAN tagged or
+ VLAN stripping is disabled, or by 8B if the packet is VLAN tagged and stripping
+ is enabled.
+ This behavior applies to 1300 and older series VIC adapters. 1400 series VICs
+ do not increment this byte counter when packets are dropped.
+
+- **RSS Hashing**
+
+ - Hardware enables and disables UDP and TCP RSS hashing together. The driver
+ cannot control UDP and TCP hashing individually.
+
+How to build the suite
+----------------------
+
The build instructions for the DPDK suite should be followed. By default
the ENIC PMD library will be built into the DPDK library.
-For configuring and using UIO and VFIO frameworks, please refer the
+Refer to the document :ref:`compiling and testing a PMD for a NIC
+<pmd_build_and_test>` for details.
+
+For configuring and using UIO and VFIO frameworks, please refer to the
documentation that comes with DPDK suite.
Supported Cisco VIC adapters
ENIC PMD supports all recent generations of Cisco VIC adapters including:
-- VIC 1280
-- VIC 1240
-- VIC 1225
-- VIC 1285
-- VIC 1225T
-- VIC 1227
-- VIC 1227T
-- VIC 1380
-- VIC 1340
-- VIC 1385
-- VIC 1387
-
-- Flow director features are not supported on generation 1 Cisco VIC adapters
- (M81KR and P81E)
+- VIC 1200 series
+- VIC 1300 series
+- VIC 1400 series
Supported Operating Systems
---------------------------
+
Any Linux distribution fulfilling the conditions described in Dependencies
section of DPDK documentation.
Supported features
------------------
+
- Unicast, multicast and broadcast transmission and reception
- Receive queue polling
- Port Hardware Statistics
- IP checksum offload
- Receive side VLAN stripping
- Multiple receive and transmit queues
-- Flow Director ADD, UPDATE, DELETE, STATS operation support for IPV4 5-TUPLE
- flows
+- Flow Director ADD, UPDATE, DELETE, STATS operation support IPv4 and IPv6
- Promiscuous mode
- Setting RX VLAN (supported via UCSM/CIMC only)
- VLAN filtering (supported via UCSM/CIMC only)
- Execution of application by unprivileged system users
- IPV4, IPV6 and TCP RSS hashing
-
-Known bugs and Unsupported features in this release
+- UDP RSS hashing (1400 series and later adapters)
+- Scattered Rx
+- MTU update
+- SR-IOV on UCS managed servers connected to Fabric Interconnects
+- Flow API
+- Overlay offload
+
+ - Rx/Tx checksum offloads for VXLAN, NVGRE, GENEVE
+ - TSO for VXLAN and GENEVE packets
+ - Inner RSS
+
+Known bugs and unsupported features in this release
---------------------------------------------------
+
- Signature or flex byte based flow direction
- Drop feature of flow direction
- VLAN based flow direction
-- non-IPV4 flow direction
+- Non-IPV4 flow direction
- Setting of extended VLAN
-- UDP RSS hashing
+- MTU update only works if Scattered Rx mode is disabled
+- Maximum receive packet length is ignored if Scattered Rx mode is used
Prerequisites
-------------
+
- Prepare the system as recommended by DPDK suite. This includes environment
- variables, hugepages configuration, tool-chains and configuration
+ variables, hugepages configuration, tool-chains and configuration.
- Insert vfio-pci kernel module using the command 'modprobe vfio-pci' if the
- user wants to use VFIO framework
+ user wants to use VFIO framework.
- Insert uio kernel module using the command 'modprobe uio' if the user wants
- to use UIO framework
+ to use UIO framework.
- DPDK suite should be configured based on the user's decision to use VFIO or
- UIO framework
+ UIO framework.
- If the vNIC device(s) to be used is bound to the kernel mode Ethernet driver
- (enic), use 'ifconfig' to bring the interface down. The dpdk_nic_bind.py tool
- can then be used to unbind the device's bus id from the enic kernel mode
- driver.
+ use 'ip' to bring the interface down. The dpdk-devbind.py tool can
+ then be used to unbind the device's bus id from the ENIC kernel mode driver.
- Bind the intended vNIC to vfio-pci in case the user wants ENIC PMD to use
- VFIO framework using dpdk_nic_bind.py.
+ VFIO framework using dpdk-devbind.py.
- Bind the intended vNIC to igb_uio in case the user wants ENIC PMD to use
- UIO framework using dpdk_nic_bind.py.
+ UIO framework using dpdk-devbind.py.
At this point the system should be ready to run DPDK applications. Once the
application runs to completion, the vNIC can be detached from vfio-pci or
Additional Reference
--------------------
-- http://www.cisco.com/c/en/us/products/servers-unified-computing
+
+- https://www.cisco.com/c/en/us/products/servers-unified-computing/index.html
+- https://www.cisco.com/c/en/us/products/interfaces-modules/unified-computing-system-adapters/index.html
Contact Information
-------------------
+
Any questions or bugs should be reported to DPDK community and to the ENIC PMD
maintainers:
- John Daley <johndale@cisco.com>
-- Nelson Escobar <neescoba@cisco.com>
+- Hyong Youb Kim <hyonkim@cisco.com>
Code Review / deb_dpdk.git / blobdiff