dad1ec72a3
Document NIC features, add more information about them and add more implementation related support. Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com> Signed-off-by: John McNamara <john.mcnamara@intel.com> Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com> Acked-by: Shreyansh Jain <shreyansh.jain@nxp.com>
61 lines
2.5 KiB
ReStructuredText
61 lines
2.5 KiB
ReStructuredText
.. BSD LICENSE
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Copyright 2016 6WIND S.A.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name of 6WIND S.A. nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Overview of Networking Drivers
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==============================
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The networking drivers may be classified in two categories:
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- physical for real devices
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- virtual for emulated devices
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Some physical devices may be shaped through a virtual layer as for
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SR-IOV.
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The interface seen in the virtual environment is a VF (Virtual Function).
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The ethdev layer exposes an API to use the networking functions
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of these devices.
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The bottom half part of ethdev is implemented by the drivers.
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Thus some features may not be implemented.
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There are more differences between drivers regarding some internal properties,
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portability or even documentation availability.
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Most of these differences are summarized below.
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More details about features can be found in :doc:`features`.
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.. _table_net_pmd_features:
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.. include:: overview_table.txt
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.. Note::
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Features marked with "P" are partially supported. Refer to the appropriate
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NIC guide in the following sections for details.
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