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Merge branch 'introduce-PLDM-firmware-update-library'
Jacob Keller says: ==================== introduce PLDM firmware update library This series goal is to enable support for updating the ice hardware flash using the devlink flash command. The ice firmware update files are distributed using the file format described by the "PLDM for Firmware Update" standard: https://www.dmtf.org/documents/pmci/pldm-firmware-update-specification-100 Because this file format is standard, this series introduces a new library that handles the generic logic for parsing the PLDM file header. The library uses a design that is very similar to the Mellanox mlxfw module. That is, a simple ops table is setup and device drivers instantiate an instance of the pldmfw library with the device specific operations. Doing so allows for each device to implement the low level behavior for how to interact with its firmware. This series includes the library and an implementation for the ice hardware. I've removed all of the parameters, and the proposed changes to support overwrite mode. I'll be working on the overwrite mask suggestion from Jakub as a follow-up series. Because the PLDM file format is a standard and not something that is specific to the Intel hardware, I opted to place this update library in lib/pldmfw. I should note that while I tried to make the library generic, it does not attempt to mimic the complete "Update Agent" as defined in the standard. This is mostly due to the fact that the actual interfaces exposed to software for the ice hardware would not allow this. This series depends on some work just recently and is based on top of the patch series sent by Tony published at: https://lore.kernel.org/netdev/20200723234720.1547308-1-anthony.l.nguyen@intel.com/T/#t Changes since v2 RFC * Removed overwrite mode patches, as this can become a follow up series with a separate discussion * Fixed a minor bug in the pldm_timestamp structure not being packed. * Dropped Cc for other driver maintainers, as this series no longer includes changes to the core flash update command. * Re-ordered patches slightly. Changes since v1 RFC * Removed the "allow_downgrade_on_flash_update" parameter. Instead, the driver will always attempt to flash the device, even when firmware indicates that it would be a downgrade. A dev_warn is used to indicate when this occurs. * Removed the "ignore_pending_flash_update". Instead, the driver will always check for and cancel any previous pending update. A devlink flash status message will be sent when this cancellation occurs. * Removed the "reset_after_flash_update" parameter. This will instead be implemented as part of a devlink reset interface, work left for a future change. * Replaced the "flash_update_preservation_level" parameter with a new "overwrite" mode attribute on the flash update command. For ice, this mode will select the preservation level. For all other drivers, I modified them to check that the mode is "OVERWRITE_NOTHING", and have Cc'd the maintainers to get their input. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>