--------------------------------------
ENIC PMD support is integrated into the DPDK suite. dpdk-<version>.tar.gz
-should be downloaded from http://core.dpdk.org/download/
+should be downloaded from https://core.dpdk.org/download/
Configuration information
-------------------------
-- **DPDK Configuration Parameters**
-
- The following configuration options are available for the ENIC PMD:
-
- - **CONFIG_RTE_LIBRTE_ENIC_PMD** (default y): Enables or disables inclusion
- of the ENIC PMD driver in the DPDK compilation.
-
- **vNIC Configuration Parameters**
- **Number of Queues**
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
-----------------------
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.
+work around the issue, block the enic module as follows.
Please see :ref:`Limitations <enic_limitations>` for limitations in
the use of SR-IOV.
passthrough devices do not require libvirt, port profiles, and VM-FEX.
-.. _enic-genic-flow-api:
+.. _enic-generic-flow-api:
Generic Flow API support
------------------------
-Generic Flow API is supported. The baseline support is:
+Generic Flow API (also called "rte_flow" API) is supported. More advanced
+capabilities are available when "Advanced Filtering" is enabled on the adapter.
+Advanced filtering 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. Advanced filtering is available on 1400 series adapters and beyond.
+To enable advanced filtering, the 'Advanced filter' radio button should be
+selected via CIMC or UCSM followed by a reboot of the server.
- **1200 series VICs**
- 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**
+- **1400 and later series VICs with Flow Manager API enabled**
- All the above plus:
-
- - Action: count
+ - Attributes: ingress, egress
+ - Items: eth, vlan, ipv4, ipv6, sctp, udp, tcp, vxlan, raw, inner eth, vlan, ipv4, ipv6, sctp, udp, tcp
+ - Ingress Actions: count, drop, flag, jump, mark, port_id, passthru, queue, rss, vxlan_decap, vxlan_encap, and void
+ - Egress Actions: count, drop, jump, passthru, vxlan_encap, and void
+ - Selectors: 'is', 'spec' and 'mask'. 'last' is not supported
+ - In total, up to 64 bytes of mask is allowed across all headers
The VIC performs packet matching after applying VLAN strip. If VLAN
stripping is enabled, EtherType in the ETH item corresponds to the
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
+ -a 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.
+Geneve headers with non-zero options are not supported by default. To
+use Geneve with options, update the VIC firmware to the latest version
+and then set ``devargs`` parameter ``geneve-opt=1``. When Geneve with
+options is enabled, flow API cannot be used as the features are
+currently mutually exclusive. When this feature is successfully
+enabled, PMD prints the following message.
+
+.. code-block:: console
+
+ Geneve with options is enabled
+
+
Ingress VLAN Rewrite
--------------------
PMD consider the vectorized handler when selecting the receive handler.
For example::
- -w 12:00.0,enable-avx2-rx=1
+ -a 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``).
enic_use_vector_rx_handler use the non-scatter avx2 Rx handler
+64B Completion Queue Entry
+--------------------------
+
+Recent VIC adapters support 64B completion queue entries, as well as
+16B entries that are available on all adapter models. ENIC PMD enables
+and uses 64B entries by default, if available. 64B entries generally
+lower CPU cycles per Rx packet, as they avoid partial DMA writes and
+reduce cache contention between DMA and polling CPU. The effect is
+most pronounced when multiple Rx queues are used on Intel platforms
+with Data Direct I/O Technology (DDIO).
+
+If 64B entries are not available, PMD uses 16B entries. The user may
+explicitly disable 64B entries and use 16B entries by setting
+``devarg`` parameter ``cq64=0``. For example::
+
+ -a 12:00.0,cq64=0
+
+To verify the selected entry size, enable debug logging
+(``--log-level=enic,debug``) and check the following messages.
+
+.. code-block:: console
+
+ PMD: rte_enic_pmd: Supported CQ entry sizes: 16 32
+ PMD: rte_enic_pmd: Using 16B CQ entry size
+
.. _enic_limitations:
Limitations
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)
+ -a 12:00.0,ig-vlan-rewrite=untag
- **SR-IOV**
- 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
+ instance may hang. As a workaround, enic.ko should be blocked 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.
packets and then receive them normally. These require 1400 series VIC adapters
and latest firmware.
- RAW items are limited to matching UDP tunnel headers like VXLAN.
+ - For 1400 VICs, all flows using the RSS action on a port use same hash
+ configuration. The RETA is ignored. The queues used in the RSS group must be
+ sequential. There is a performance hit if the number of queues is not a power of 2.
+ Only level 0 (outer header) RSS is allowed.
- **Statistics**
- IP checksum offload
- Receive side VLAN stripping
- Multiple receive and transmit queues
-- 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)
PMD. Typically, the limit has to be raised to higher than 2GB.
e.g., 2621440
-The compilation of any unused drivers can be disabled using the
-configuration file in config/ directory (e.g., config/common_linuxapp).
-This would help in bringing down the time taken for building the
-libraries and the initialization time of the application.
-
Additional Reference
--------------------
git.droids-corp.org / dpdk.git / blobdiff