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doc: update NFP guide

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New CPP interface changes the way firmware upload is managed by
the PMD. It also supports different firmware file names for
having specific firmware applications per card.

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
This commit is contained in:
Alejandro Lucero 2018-04-05 15:42:46 +01:00 committed by Ferruh Yigit
parent 896c265ef9
commit b2a99605bc
1 changed files with 26 additions and 8 deletions
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34
doc/guides/nics/nfp.rst
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@ -99,17 +99,35 @@ bound to ``igb_uio`` or ``vfio-pci`` kernel drivers. Future DPDK versions will
have a PMD able to work with the PF and VFs at the same time and with the PF
implementing VF management along with other PF-only functionalities/offloads.
The PMD PF has extra work to do which will delay the DPDK app initialization.
This additional effort could be checking if a firmware is already available in
the device, uploading the firmware if necessary or configuring the Link state
properly when starting or stopping a PF port. Note that firmware upload is not
always necessary which is the main delay for NFP PF PMD initialization.
The PMD PF has extra work to do which will delay the DPDK app initialization
like uploading the firmware and configure the Link state properly when starting or
stopping a PF port. Since DPDK 18.05 the firmware upload happens when
a PF is initialized, which was not always true with older DPDK versions.
Depending on the Netronome product installed in the system, firmware files
should be available under ``/lib/firmware/netronome``. DPDK PMD supporting the
PF requires a specific link, ``/lib/firmware/netronome/nic_dpdk_default.nffw``,
which should be created automatically with Netronome's Agilio products
installation.
PF looks for a firmware file in this order:
1) First try to find a firmware image specific for this device using the
NFP serial number:
serial-00-15-4d-12-20-65-10-ff.nffw
2) Then try the PCI name:
pci-0000:04:00.0.nffw
3) Finally try the card type and media:
nic_AMDA0099-0001_2x25.nffw
Netronome's software packages install firmware files under ``/lib/firmware/netronome``
to support all the Netronome's SmartNICs and different firmware applications.
This is usually done using file names based on SmartNIC type and media and with a
directory per firmware application. Options 1 and 2 for firmware filenames allow
more than one SmartNIC, same type of SmartNIC or different ones, and to upload a
different firmware to each SmartNIC.
PF multiport support
--------------------