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Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/devlink/ixgbe.rst | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/networking/devlink/ixgbe.rst b/Documentation/networking/devlink/ixgbe.rst index 3fce291348fa..c27d1436c70e 100644 --- a/Documentation/networking/devlink/ixgbe.rst +++ b/Documentation/networking/devlink/ixgbe.rst @@ -120,3 +120,52 @@ EMP firmware image. The driver does not currently support reloading the driver via ``DEVLINK_RELOAD_ACTION_DRIVER_REINIT``. + +Regions +======= + +The ``ixgbe`` driver implements the following regions for accessing internal +device data. + +.. list-table:: regions implemented + :widths: 15 85 + + * - Name + - Description + * - ``nvm-flash`` + - The contents of the entire flash chip, sometimes referred to as + the device's Non Volatile Memory. + * - ``shadow-ram`` + - The contents of the Shadow RAM, which is loaded from the beginning + of the flash. Although the contents are primarily from the flash, + this area also contains data generated during device boot which is + not stored in flash. + * - ``device-caps`` + - The contents of the device firmware's capabilities buffer. Useful to + determine the current state and configuration of the device. + +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 + + $ devlink region show + pci/0000:01:00.0/nvm-flash: size 10485760 snapshot [] max 1 + pci/0000:01:00.0/device-caps: size 4096 snapshot [] max 10 + + $ devlink region new pci/0000:01:00.0/nvm-flash snapshot 1 + + $ devlink region dump pci/0000:01:00.0/nvm-flash snapshot 1 + 0000000000000000 0014 95dc 0014 9514 0035 1670 0034 db30 + 0000000000000010 0000 0000 ffff ff04 0029 8c00 0028 8cc8 + 0000000000000020 0016 0bb8 0016 1720 0000 0000 c00f 3ffc + 0000000000000030 bada cce5 bada cce5 bada cce5 bada cce5 + + $ devlink region read pci/0000:01:00.0/nvm-flash snapshot 1 address 0 length 16 + 0000000000000000 0014 95dc 0014 9514 0035 1670 0034 db30 + + $ devlink region delete pci/0000:01:00.0/device-caps snapshot 1 |