nfp_cpp_area_alloc(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nfp_cpp_area_alloc — allocate a new CPP area

okay bestie, this is a page straight out of the Kernel API Manual and honestly? it's a whole vibe. it's nfp_cpp_area_alloc and it does Exactly One Thing, but it does it iconically. come sit with me 🫶

✨ SYNOPSIS ✨

struct nfp_cpp_area * nfp_cpp_area_alloc (struct nfp_cpp *cpp , u32 dest
, unsigned long long address , unsigned long size );

she's giving "one function, four arguments, zero notes" 💅

🎀 ARGUMENTS 🎀

  • cpp — the CPP handle. your main character pointer, the whole entry point 💖
  • dest — the CPP id. like, which target we're talking about, an actual u32 💫
  • address — the start address on the CPP target. where the party begins ✨
  • size — how big the area is, in bytes. know your size, queen 📏

🌸 DESCRIPTION 🌸

so what she actually does: she allocates and initializes a CPP area structure. that's the whole assignment 💅

but listen — and this is the important part, don't skip it — the area is not ready to touch the second you get it back. nope. it has to be locked down with an 'acquire' before it can be safely accessed. think of it as the area being "assembled but not yet blessed". you gotta do the acquire ritual first, then you can go in, no cap 🙈

⭐ NOTE ⭐

⚠️ real talk: address and size must be 32-bit aligned values. like, both of them. not optional, not a suggestion, not a "well technically". it's a hard requirement, so check that vibe before you call her 💀

🔥 RETURN 🔥

an NFP CPP Area handle on success 💖 — or NULL if it doesn't work out 😭. yes, you need to check. yes, everyone forgets. don't be everyone ✨

🦋 SEE ALSO 🦋

the source of truth lives right here:

  • Kernel file ./drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c

and the whole friend group, in order:

and that's the page!! go allocate something responsibly, bestie. this came from ./drivers/net/ethernet/netrono... and she's dated October 2026 — so like, future icon behavior honestly 👑✨💜

📦 where this page comes from