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doc: add secondary VF details in thunderx guide

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thunderx-nic uses secondary VF's to provide more queues to DPDK.
Current instructions explain the concept but don't show an easy way to
find which PCI id is primary and which is secondary VF's.

This patch extending the documentation of secondary VF w.r.t
the enumeration details.

Signed-off-by: Krzysztof Kanas <kkanas@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
This commit is contained in:
Krzysztof Kanas 2020-01-28 14:31:47 +01:00 committed by Ferruh Yigit
parent b4bf22d173
commit b47e7a11f5
1 changed files with 49 additions and 0 deletions
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49
doc/guides/nics/thunderx.rst
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@ -313,6 +313,55 @@ We will choose four secondary queue sets from the ending of the list (0002:01:01
The nicvf thunderx driver will make use of attached secondary VFs automatically during the interface configuration stage.
driver thunder-nic VF's
~~~~~~~~~~~~~~~~~~~~~~~
Use sysfs to distinguish thunder-nic primary VFs and secondary VFs.
.. code-block:: console
ll /sys/bus/pci/drivers/thunder-nic/
total 0
drwxr-xr-x 2 root root 0 Jan 22 11:19 ./
drwxr-xr-x 86 root root 0 Jan 22 11:07 ../
lrwxrwxrwx 1 root root 0 Jan 22 11:19 0001:01:00.0 -> '../../../../devices/platform/soc@0/849000000000.pci/pci0001:00/0001:00:10.0/0001:01:00.0'/
cat /sys/bus/pci/drivers/thunder-nic/0001\:01\:00.0/sriov_sqs_assignment
12
0 0001:01:00.1 vfio-pci +: 12 13
1 0001:01:00.2 thunder-nicvf -:
2 0001:01:00.3 thunder-nicvf -:
3 0001:01:00.4 thunder-nicvf -:
4 0001:01:00.5 thunder-nicvf -:
5 0001:01:00.6 thunder-nicvf -:
6 0001:01:00.7 thunder-nicvf -:
7 0001:01:01.0 thunder-nicvf -:
8 0001:01:01.1 thunder-nicvf -:
9 0001:01:01.2 thunder-nicvf -:
10 0001:01:01.3 thunder-nicvf -:
11 0001:01:01.4 thunder-nicvf -:
12 0001:01:01.5 vfio-pci: 0
13 0001:01:01.6 vfio-pci: 0
14 0001:01:01.7 thunder-nicvf: 255
15 0001:01:02.0 thunder-nicvf: 255
16 0001:01:02.1 thunder-nicvf: 255
17 0001:01:02.2 thunder-nicvf: 255
18 0001:01:02.3 thunder-nicvf: 255
19 0001:01:02.4 thunder-nicvf: 255
20 0001:01:02.5 thunder-nicvf: 255
21 0001:01:02.6 thunder-nicvf: 255
22 0001:01:02.7 thunder-nicvf: 255
23 0001:01:03.0 thunder-nicvf: 255
24 0001:01:03.1 thunder-nicvf: 255
25 0001:01:03.2 thunder-nicvf: 255
26 0001:01:03.3 thunder-nicvf: 255
27 0001:01:03.4 thunder-nicvf: 255
28 0001:01:03.5 thunder-nicvf: 255
29 0001:01:03.6 thunder-nicvf: 255
30 0001:01:03.7 thunder-nicvf: 255
31 0001:01:04.0 thunder-nicvf: 255
Every column that ends with 'thunder-nicvf: number' can be used as secondary VF.
In printout above all entres after '14 0001:01:01.7 thunder-nicvf: 255' can be used as secondary VF.
Module params
--------------