-.. BSD LICENSE
- Copyright (c) 2016 Solarflare Communications Inc.
- All rights reserved.
+.. SPDX-License-Identifier: BSD-3-Clause
+ Copyright(c) 2019-2020 Xilinx, Inc.
+ Copyright(c) 2016-2019 Solarflare Communications Inc.
This software was jointly developed between OKTET Labs (under contract
for Solarflare) and Solarflare Communications, Inc.
- 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 OWNER 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.
-
Solarflare libefx-based Poll Mode Driver
========================================
- Allmulticast mode
-- TCP segmentation offload (TSO)
+- TCP segmentation offload (TSO) including VXLAN and GENEVE encapsulated
- Multicast MAC filter
- Scattered Rx DMA for packet that are larger that a single Rx descriptor
+- Receive queue interrupts
+
- Deferred receive and transmit queue start
- Transmit VLAN insertion (if running firmware variant supports it)
- Flow API
+- Loopback
+
Non-supported Features
----------------------
The features not yet supported include:
-- Receive queue interupts
-
- Priority-based flow control
-- Loopback
-
- Configurable RX CRC stripping (always stripped)
- Header split on receive
It should be taken into account when mbuf pool for receive is created.
+Equal stride super-buffer mode
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+When the receive queue uses equal stride super-buffer DMA mode, one HW Rx
+descriptor carries many Rx buffers which contiguously follow each other
+with some stride (equal to total size of rte_mbuf as mempool object).
+Each Rx buffer is an independent rte_mbuf.
+However dedicated mempool manager must be used when mempool for the Rx
+queue is created. The manager must support dequeue of the contiguous
+block of objects and provide mempool info API to get the block size.
+
+Another limitation of a equal stride super-buffer mode, imposed by the
+firmware, is that it allows for a single RSS context.
+
+
Tunnels support
---------------
- DROP
+- FLAG (supported only with ef10_essb Rx datapath)
+
+- MARK (supported only with ef10_essb Rx datapath)
+
Validating flow rules depends on the firmware variant.
-Ethernet destinaton individual/group match
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+The :ref:`flow_isolated_mode` is supported.
+
+Ethernet destination individual/group match
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ethernet item supports I/G matching, if only the corresponding bit is set
-in the mask of destination address. If destinaton address in the spec is
-multicast, it matches all multicast (and broadcast) packets, oherwise it
+in the mask of destination address. If destination address in the spec is
+multicast, it matches all multicast (and broadcast) packets, otherwise it
matches unicast packets that are not filtered by other flow rules.
Exceptions to flow rules
- Solarflare X2522 Dual Port SFP28 10/25GbE Adapter
+ - Solarflare X2541 Single Port QSFP28 10/25G/100G Adapter
+
+ - Solarflare X2542 Dual Port QSFP28 10/25G/100G Adapter
+
- Solarflare Flareon [Ultra] Server Adapters:
- Solarflare SFN8522 Dual Port SFP+ Server Adapter
Case-insensitive 1/y/yes/on or 0/n/no/off may be used to specify
boolean parameters value.
-- ``rx_datapath`` [auto|efx|ef10] (default **auto**)
+- ``rx_datapath`` [auto|efx|ef10|ef10_esps] (default **auto**)
Choose receive datapath implementation.
**auto** allows the driver itself to make a choice based on firmware
**efx** chooses libefx-based datapath which supports Rx scatter.
**ef10** chooses EF10 (SFN7xxx, SFN8xxx, X2xxx) native datapath which is
more efficient than libefx-based and provides richer packet type
- classification, but lacks Rx scatter support.
+ classification.
+ **ef10_esps** chooses SFNX2xxx equal stride packed stream datapath
+ which may be used on DPDK firmware variant only
+ (see notes about its limitations above).
- ``tx_datapath`` [auto|efx|ef10|ef10_simple] (default **auto**)
Mbuf segments may come from different mempools, and mbuf reference
counters are treated responsibly.
**ef10** chooses EF10 (SFN7xxx, SFN8xxx, X2xxx) native datapath which is
- more efficient than libefx-based but has no VLAN insertion and TSO
- support yet.
+ more efficient than libefx-based but has no VLAN insertion support yet.
Mbuf segments may come from different mempools, and mbuf reference
counters are treated responsibly.
**ef10_simple** chooses EF10 (SFN7xxx, SFN8xxx, X2xxx) native datapath which
- ``perf_profile`` [auto|throughput|low-latency] (default **throughput**)
- Choose hardware tunning to be optimized for either throughput or
+ Choose hardware tuning to be optimized for either throughput or
low-latency.
**auto** allows NIC firmware to make a choice based on
- installed licences and firmware variant configured using **sfboot**.
+ installed licenses and firmware variant configured using **sfboot**.
- ``stats_update_period_ms`` [long] (default **1000**)
value will select a fixed update period of **1000** milliseconds
- ``fw_variant`` [dont-care|full-feature|ultra-low-latency|
- capture-packed-stream] (default **dont-care**)
+ capture-packed-stream|dpdk] (default **dont-care**)
Choose the preferred firmware variant to use. In order for the selected
option to have an effect, the **sfboot** utility must be configured with the
**ultra-low-latency** chooses firmware with fewer features but lower latency.
**capture-packed-stream** chooses firmware for SolarCapture packed stream
mode.
+ **dpdk** chooses DPDK firmware with equal stride super-buffer Rx mode
+ for higher Rx packet rate and packet marks support and firmware subvariant
+ without checksumming on transmit for higher Tx packet rate if
+ checksumming is not required.
+
+- ``rxd_wait_timeout_ns`` [long] (default **200 us**)
+
+ Adjust timeout in nanoseconds to head-of-line block to wait for
+ Rx descriptors.
+ The accepted range is 0 to 400 ms.
+ Flow control should be enabled to make it work.
+ The value of **0** disables it and packets are dropped immediately.
+ When a packet is dropped because of no Rx descriptors,
+ ``rx_nodesc_drop_cnt`` counter grows.
+ The feature is supported only by the DPDK firmware variant when equal
+ stride super-buffer Rx mode is used.
Dynamic Logging Parameters
One may leverage EAL option "--log-level" to change default levels
for the log types supported by the driver. The option is used with
-an argument typically consisting of two parts separated by a comma.
+an argument typically consisting of two parts separated by a colon.
-Level value is the last part which takes an integer greater than 0.
-Log type is the former part which may contain a regular expression.
+Level value is the last part which takes a symbolic name (or integer).
+Log type is the former part which may shell match syntax.
Depending on the choice of the expression, the given log level may
be used either for some specific log type or for a subset of types.
SFC EFX PMD provides the following log types available for control:
-- ``pmd.net.sfc.driver`` (default level is **6** - ``RTE_LOG_NOTICE``)
+- ``pmd.net.sfc.driver`` (default level is **notice**)
Affects driver-wide messages unrelated to any particular devices.
-- ``pmd.net.sfc.main`` (default level is **6** - ``RTE_LOG_NOTICE``)
+- ``pmd.net.sfc.main`` (default level is **notice**)
Matches a subset of per-port log types registered during runtime.
A full name for a particular type may be obtained by appending a
dot and a PCI device identifier (``XXXX:XX:XX.X``) to the prefix.
-- ``pmd.net.sfc.mcdi`` (default level is **6** - ``RTE_LOG_NOTICE``)
+- ``pmd.net.sfc.mcdi`` (default level is **notice**)
Extra logging of the communication with the NIC's management CPU.
The format of the log is consumed by the Solarflare netlogdecode
git.droids-corp.org / dpdk.git / blobdiff