nfp_cpp_area_readq(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nfp_cpp_area_readq(9) — from the Kernel API Manual, bestie

Okay so picture this: it's a kernel API manual page, it's called nfp_cpp_area_readq, and it does exactly one (1) thing and honestly? It slays at it. Let me put you on. 🫶

✨ NAME ✨

nfp_cpp_area_readq — read a u64 word from an area. That's it. That's the whole vibe. One word, sixty-four bits, no cap. 💖

🦋 SYNOPSIS 🦋

int nfp_cpp_area_readq (struct nfp_cpp_area *area , unsigned long offset
, u64 *value );

So you hand it three things and it hands you back an int. The int is the receipts, the u64 is the prize. Iconic behaviour, honestly. ⭐

🌸 ARGUMENTS 🌸

  • area — your CPP Area handle. This is the main character — the whole neighborhood you're reading out of. 🏠
  • offset — offset into that area. Like, where in the area. Don't just start grabbing bytes at random, bestie, we have structure here. 📍
  • value — pointer to your read buffer. This is where the u64 lands. Empty lil box, and the function fills it. 🎁

🔥 RETURN 🔥

0 on success, or -ERRNO. So like — zero means we ate, and anything else is a negative errno telling you what went wrong. Check it. Fr fr. 🙈

🌈 SEE ALSO 🌈

The kernel file it all lives in:

./drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c

And the whole friend group — every single one, no skipping, because they're all part of the lore:

struct nfp_cpp(9), nfp_cpp_free(9), nfp_cpp_model(9), nfp_cpp_interface(9), nfp_cpp_serial(9), nfp_cpp_area_alloc_with_name(9), nfp_cpp_area_alloc(9), nfp_cpp_area_alloc_acquire(9), nfp_cpp_area_free(9), nfp_cpp_area_acquire(9), nfp_cpp_area_acquire_nonblocking(9), nfp_cpp_area_release(9), nfp_cpp_area_release_free(9), nfp_cpp_area_read(9), nfp_cpp_area_write(9), nfp_cpp_area_size(9), nfp_cpp_area_name(9), nfp_cpp_area_priv(9), nfp_cpp_area_cpp(9), nfp_cpp_area_resource(9), nfp_cpp_area_phys(9), nfp_cpp_area_iomem(9), nfp_cpp_area_readl(9), nfp_cpp_area_writel(9), nfp_cpp_area_writeq(9), nfp_cpp_area_fill(9), nfp_cpp_area_cache_add(9), nfp_cpp_read(9), nfp_cpp_write(9), nfp_xpb_readl(9), nfp_xpb_writel(9), nfp_xpb_writelm(9), nfp_cpp_from_operations(9), nfp_cpp_priv(9), nfp_cpp_device(9), nfp_cpp_explicit_acquire(9), nfp_cpp_explicit_set_target(9), nfp_cpp_explicit_set_data(9), nfp_cpp_explicit_set_signal(9), nfp_cpp_explicit_set_posted(9), nfp_cpp_explicit_put(9), nfp_cpp_explicit_do(9), nfp_cpp_explicit_get(9), nfp_cpp_explicit_release(9), nfp_cpp_explicit_cpp(9), nfp_cpp_explicit_priv(9)

Like I said. The whole group chat. 💀✨

Also note the source path got clipped in the footer as ./drivers/net/ethernet/netrono... — that's the same file as above, just doing a little outfit change. 💅

And that's the page!! Signing off from October 2026, straight out of the Kernel API Manual, written in ./drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c — go read a u64, bestie, you've got this. 🎀🦋💜

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