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authorLuca Boccassi <luca.boccassi@gmail.com>2018-08-14 18:52:30 +0100
committerLuca Boccassi <luca.boccassi@gmail.com>2018-08-14 18:53:17 +0100
commitb63264c8342e6a1b6971c79550d2af2024b6a4de (patch)
tree83114aac64286fe616506c0b3dfaec2ab86ef835 /doc/guides/nics/szedata2.rst
parentca33590b6af032bff57d9cc70455660466a654b2 (diff)
New upstream version 18.08upstream/18.08
Change-Id: I32fdf5e5016556d9c0a6d88ddaf1fc468961790a Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'doc/guides/nics/szedata2.rst')
-rw-r--r--doc/guides/nics/szedata2.rst104
1 files changed, 48 insertions, 56 deletions
diff --git a/doc/guides/nics/szedata2.rst b/doc/guides/nics/szedata2.rst
index 1a5d4138..a2092f9c 100644
--- a/doc/guides/nics/szedata2.rst
+++ b/doc/guides/nics/szedata2.rst
@@ -1,32 +1,5 @@
-.. BSD LICENSE
+.. SPDX-License-Identifier: BSD-3-Clause
Copyright 2015 - 2016 CESNET
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * 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.
- * Neither the name of CESNET nor the names of its
- contributors may be used to endorse or promote products derived
- from this software without specific prior written permission.
-
- 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.
SZEDATA2 poll mode driver library
=================================
@@ -70,8 +43,10 @@ separately:
* **Kernel modules**
+ * combo6core
* combov3
- * szedata2_cv3
+ * szedata2
+ * szedata2_cv3 or szedata2_cv3_fdt
Kernel modules manage initialization of hardware, allocation and
sharing of resources for user space applications.
@@ -79,6 +54,15 @@ separately:
Information about getting the dependencies can be found `here
<http://www.netcope.com/en/company/community-support/dpdk-libsze2>`_.
+Versions of the packages
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+The minimum version of the provided packages:
+
+* for DPDK from 18.05: **4.4.1**
+
+* for DPDK up to 18.02 (including): **3.0.5**
+
Configuration
-------------
@@ -89,45 +73,53 @@ These configuration options can be modified before compilation in the
Value **y** enables compilation of szedata2 PMD.
-* ``CONFIG_RTE_LIBRTE_PMD_SZEDATA2_AS`` default value: **0**
-
- This option defines type of firmware address space and must be set
- according to the used card and mode.
- Currently supported values are:
-
- * **0** - for cards (modes):
-
- * NFB-100G1 (100G1)
+Using the SZEDATA2 PMD
+----------------------
- * **1** - for cards (modes):
+From DPDK version 16.04 the type of SZEDATA2 PMD is changed to PMD_PDEV.
+SZEDATA2 device is automatically recognized during EAL initialization.
+No special command line options are needed.
- * NFB-100G2Q (100G1)
+Kernel modules have to be loaded before running the DPDK application.
- * **2** - for cards (modes):
+NFB card architecture
+---------------------
- * NFB-40G2 (40G2)
- * NFB-100G2C (100G2)
- * NFB-100G2Q (40G2)
+The NFB cards are multi-port multi-queue cards, where (generally) data from any
+Ethernet port may be sent to any queue.
+They were historically represented in DPDK as a single port.
- * **3** - for cards (modes):
+However, the new NFB-200G2QL card employs an addon cable which allows to connect
+it to two physical PCI-E slots at the same time (see the diagram below).
+This is done to allow 200 Gbps of traffic to be transferred through the PCI-E
+bus (note that a single PCI-E 3.0 x16 slot provides only 125 Gbps theoretical
+throughput).
- * NFB-40G2 (10G8)
- * NFB-100G2Q (10G8)
+Since each slot may be connected to a different CPU and therefore to a different
+NUMA node, the card is represented as two ports in DPDK (each with half of the
+queues), which allows DPDK to work with data from the individual queues on the
+right NUMA node.
- * **4** - for cards (modes):
+.. figure:: img/szedata2_nfb200g_architecture.*
+ :align: center
- * NFB-100G1 (10G10)
+ NFB-200G2QL high-level diagram
- * **5** - for experimental firmwares and future use
+Limitations
+-----------
-Using the SZEDATA2 PMD
-----------------------
+The SZEDATA2 PMD does not support operations related to Ethernet ports
+(link_up, link_down, set_mac_address, etc.).
-From DPDK version 16.04 the type of SZEDATA2 PMD is changed to PMD_PDEV.
-SZEDATA2 device is automatically recognized during EAL initialization.
-No special command line options are needed.
+NFB cards employ multiple Ethernet ports.
+Until now, Ethernet port-related operations were performed on all of them
+(since the whole card was represented as a single port).
+With NFB-200G2QL card, this is no longer viable (see above).
-Kernel modules have to be loaded before running the DPDK application.
+Since there is no fixed mapping between the queues and Ethernet ports, and since
+a single card can be represented as two ports in DPDK, there is no way of
+telling which (if any) physical ports should be associated with individual
+ports in DPDK.
Example of usage
----------------