Add gearbox phy device files and a new physyncd docker to support VS gearbox phy feature (#4851 )

* buildimage: Add gearbox phy device files and a new physyncd docker to support VS gearbox phy feature

* scripts and configuration needed to support a second syncd docker (physyncd)
* physyncd supports gearbox device and phy SAI APIs and runs multiple instances of syncd, one per phy in the device
* support for VS target (sonic-sairedis vslib has been extended to support a virtual BCM81724 gearbox PHY).

HLD is located at b817a12fd8/doc/gearbox/gearbox_mgr_design.md

**- Why I did it**

This work is part of the gearbox phy joint effort between Microsoft and Broadcom, and is based
on multi-switch support in sonic-sairedis.

**- How I did it**

Overall feature was implemented across several projects. The collective pull requests (some in late stages of review at this point):

https://github.com/Azure/sonic-utilities/pull/931 - CLI (merged)
https://github.com/Azure/sonic-swss-common/pull/347 - Minor changes (merged)
https://github.com/Azure/sonic-swss/pull/1321 - gearsyncd, config parsers, changes to orchargent to create gearbox phy on supported systems
https://github.com/Azure/sonic-sairedis/pull/624 - physyncd, virtual BCM81724 gearbox phy added to vslib

**- How to verify it**

In a vslib build:

root@sonic:/home/admin# show gearbox interfaces status
  PHY Id    Interface        MAC Lanes    MAC Lane Speed        PHY Lanes    PHY Lane Speed    Line Lanes    Line Lane Speed    Oper    Admin
--------  -----------  ---------------  ----------------  ---------------  ----------------  ------------  -----------------  ------  -------
       1   Ethernet48  121,122,123,124               25G  200,201,202,203               25G       204,205                50G    down     down
       1   Ethernet49  125,126,127,128               25G  206,207,208,209               25G       210,211                50G    down     down
       1   Ethernet50      69,70,71,72               25G  212,213,214,215               25G           216               100G    down     down

In addition, docker ps | grep phy should show a physyncd docker running.

  Signed-off-by: syd.logan@broadcom.com

2020-09-25 08:32:44 -07:00

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Changing the virtual device

You can control the hw sku and default factory configuration for the VS image by modifying the content of the file default_sku in this directory.

The format of default_sku is a single line:

<hw_key> <default_preset>

Allowable values for hw_key

hw_key	Device
Force10-S6000	Dell Force10 S6000
brcm_gearbox_vs	Similar to Force10-S6000, but implements a virtual BRCM81724 Gearbox Phy

Allowable values for default_preset

These include "t1", "l2", and "empty". See the file sonic-buildimage/src/sonic-config-engine/config_samples.py for details on how each default_preset value is interpreted.

Changing the hwsku of an existing VS switch

To change the default hwsku for a VS image that has already been built and installed, follow these steps:

Edit /usr/share/sonic/device/x86_64-kvm_x86_64-r0/default_sku. For details, see the section below (Device Specific Documentation)
Edit /etc/sonic/config_db.json, and change the "hwsku" key in DEVICE_METADATA:localhost to match the hw_key used in default_sku. Example:

"DEVICE_METADATA": { "localhost": { ... "hwsku": "brcm_gearbox_vs", ... } }, ...
Reboot the switch
Use "show platform summary" to verify, and follow any steps specific to the platform, as needed, such as those described below for the brcm_gearbox_vs hwsku.

Device Specific Documentation

For general info on building, see https://github.com/Azure/sonic-buildimage/blob/master/README.md

Force-10-S6000

This is the default VS for SONiC. To enable, set contents of default_sku to:

Force10-S6000 t1

To build:

make init
make configure PLATFORM=vs
make target/sonic-vs.img.gz

brcm_gearbox_vs

This sku simulates a device with a Broadcom BRCM81724 gearbox PHY. To enable, set default_sku to:

brcm_gearbox_vs t1

To build (same as Force-10-S6000):

make init
make configure PLATFORM=vs
make target/sonic-vs.img.gz

To verify, install and bring up SONiC. There will be a new gbsyncd docker which is designed to respond to configuration directed towards the gearbox phy "switch". swss will create that gearbox switch on startup after detecting the gearbox is present (this is done by a short lived gearsyncd that runs in the swss docker).

The commands "show gearbox interfaces status" and "show gearbox phys status" can be used to verify the virtual gearbox phy has been created. See https://github.com/Azure/sonic-utilities/blob/master/doc/Command-Reference.md#gearbox for details.

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