.. SPDX-License-Identifier: GPL-2.0-only
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=========================
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Driver-specific callbacks
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=========================
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The ``pldmfw`` module relies on the device driver for implementing device
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specific behavior using the following operations.
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``.match_record``
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-----------------
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The ``.match_record`` operation is used to determine whether a given PLDM
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record matches the device being updated. This requires comparing the record
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descriptors in the record with information from the device. Many record
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descriptors are defined by the PLDM standard, but it is also allowed for
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devices to implement their own descriptors.
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The ``.match_record`` operation should return true if a given record matches
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the device.
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``.send_package_data``
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----------------------
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The ``.send_package_data`` operation is used to send the device-specific
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package data in a record to the device firmware. If the matching record
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provides package data, ``pldmfw`` will call the ``.send_package_data``
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function with a pointer to the package data and with the package data
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length. The device driver should send this data to firmware.
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``.send_component_table``
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-------------------------
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The ``.send_component_table`` operation is used to forward component
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information to the device. It is called once for each applicable component,
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that is, for each component indicated by the matching record. The
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device driver should send the component information to the device firmware,
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and wait for a response. The provided transfer flag indicates whether this
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is the first, last, or a middle component, and is expected to be forwarded
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to firmware as part of the component table information. The driver should an
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error in the case when the firmware indicates that the component cannot be
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updated, or return zero if the component can be updated.
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``.flash_component``
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--------------------
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The ``.flash_component`` operation is used to inform the device driver to
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flash a given component. The driver must perform any steps necessary to send
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the component data to the device.
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``.finalize_update``
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--------------------
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The ``.finalize_update`` operation is used by the ``pldmfw`` library in
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order to allow the device driver to perform any remaining device specific
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logic needed to finish the update.
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