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33f40117c0
TLV (type, length, value) files are the new image format used by Nova to encapsulate firmware images and their metadata. Unlike the firmware files for previous versions of the firmware, TLV filenames are not versioned, and they have a .tlv suffix. Add function request_tlv() to load TLV firmware images. Add the Tlv struct and supporting types for parsing TLV firmware images. TLV files begin with a 4-byte magic header, which must be "NVFW" for Nvidia firmware files. This is followed by a sequence of blocks each containing a 4-byte ASCII tag, a 4-byte little-endian length, and a payload padded to a 4-byte boundary. Tlv::new() validates the entire image up front, so that the iterator can subsequently yield blocks without fallible parsing. Also add accessor methods for the various encoded types that will be used by the driver. Signed-off-by: Timur Tabi <ttabi@nvidia.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Tested-by: Alexandre Courbot <acourbot@nvidia.com> Link: https://patch.msgid.link/20260731201017.2580713-4-ttabi@nvidia.com [ Drop unnecessary payload.is_empty() check in Tlv::new(), use EINVAL instead of ENODATA in Tlv::get_bytes() and add a corresponding TODO comment. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>