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ice: implement direct read for NVM and Shadow RAM regions

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Implement the .read handler for the NVM and Shadow RAM regions. This
enables user space to read a small chunk of the flash without needing the
overhead of creating a full snapshot.

Update the documentation for ice to detail which regions have direct read
support.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jacob Keller
2022-11-28 12:36:47 -08:00
committed by Jakub Kicinski
parent 2d0197843f
commit 3af4b40b0f
2 changed files with 75 additions and 2 deletions
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Documentation/networking/devlink/ice.rst
+6 -2
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@@ -198,8 +198,12 @@ device data.
- The contents of the device firmware's capabilities buffer. Useful to
determine the current state and configuration of the device.
Users can request an immediate capture of a snapshot via the
``DEVLINK_CMD_REGION_NEW``
Both the ``nvm-flash`` and ``shadow-ram`` regions can be accessed without a
snapshot. The ``device-caps`` region requires a snapshot as the contents are
sent by firmware and can't be split into separate reads.
Users can request an immediate capture of a snapshot for all three regions
via the ``DEVLINK_CMD_REGION_NEW`` command.
.. code:: shell