NFP_CPP_INTERFACE(9)

💅 NFP_CPP_INTERFACE(9) 💅

okay so this is the Kernel API Manual moment for NFP_CPP_INTERFACE(9), and it's literally about constructing a 16-bit NFP Interface ID. bestie, it's giving tiny-but-iconic bitfield energy 🫶✨

🎀 NAME 🎀

NFP_CPP_INTERFACE — Construct a 16-bit NFP Interface ID 💖

✨ SYNOPSIS ✨

NFP_CPP_INTERFACE (type , unit , channel );

🫶 ARGUMENTS 🫶

• type — NFP Interface Type 🌸
• unit — Unit identifier for the interface type 🎀
• channel — Channel identifier for the interface unit 🦋

💖 DESCRIPTION 💖

so the way this works is: an Interface ID is made of 4 bits of interface type, 4 bits of unit identifier, and 8 bits of channel identifier. it's a whole little bit-packing situation, no cap ✨

the NFP Interface ID is used in the implementation of NFP CPP API mutexes, which use the MU Atomic CompareAndWrite operation — hence the limit to 16 bits to be able to use the NFP Interface ID as a lock owner. periodt, that's why the size cap is there 💅🔥

🔥 RETURN 🔥

Returns the Interface ID 👑💖

🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h 🧚
• NFP_CPP_ID(9)
• NFP_CPP_ISLAND_ID(9)
• NFP_CPP_ID_TARGET_of(9)
• NFP_CPP_ID_TOKEN_of(9)
• NFP_CPP_ID_ACTION_of(9)
• NFP_CPP_ID_ISLAND_of(9)
• NFP_CPP_INTERFACE_TYPE_of(9)
• NFP_CPP_INTERFACE_UNIT_of(9)
• NFP_CPP_INTERFACE_CHANNEL_of(9)
• nfp_cppcore_pcie_unit(9)
• struct nfp_cpp_operations(9)

mwah 💋 this page's source/version is ./drivers/net/ethernet/netrono..., it's dated October 2026, and the title is NFP_CPP_INTERFACE(9) — and that's the whole vibe check, bestie 💜🎀⭐