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Enhance pcieutil to check actual presence of pcie device #191

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prgeor opened this issue Jun 1, 2021 · 1 comment
Open

Enhance pcieutil to check actual presence of pcie device #191

prgeor opened this issue Jun 1, 2021 · 1 comment
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@assrinivasan

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prgeor commented Jun 1, 2021

pcieutil checks the sysfs entry to conclude if a pcie device is present or not. The sysfs entry won't be updated for non-hotplug pcie device if say, a downstream port of a pcie switch (to which a pcie device is connected) receives a "hot-reset". In this case the pcie device will be disconnected from the bus, but sysfs entry doesn't reflect the missing device.
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prgeor commented Jun 1, 2021

Hot reset on downstream port of a pcie switch can happen when the upstream port reports a "DL_Down" state which in turn can happen when the upstream port has lost connection to the upstream device due to an error that is not recoverable by the physical layer and data link layer.

@prgeor prgeor mentioned this issue Jun 1, 2021
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@assrinivasan assrinivasan self-assigned this Dec 21, 2023
@assrinivasan assrinivasan mentioned this issue Jan 25, 2024
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oleksandrivantsiv pushed a commit to oleksandrivantsiv/sonic-platform-common that referenced this issue Oct 25, 2024
@qiluo-msft
Replace swsssdk.SonicV2Connector with swsscommon implementation (soni…
bf60a27 
…c-net#191)

swsssdk will be deprecated, and the python version of redis accessing classes will be replace by the same name classes in swsscommon, which are SWIG wrapped C++ code.
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Added a procfs check for pcie peripherals to verify device ID. assrinivasan/sonic-platform-common
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