nfp_cpp_area..._nonblocking(9)

💅 nfp_cpp_area_acquire_nonblocking 💅

okay bestie, so this one lives in the Kernel API Manual (yes, that's the manual name, it's giving official ✨) and the page itself is called nfp_cpp_area..._nonblocking(9). grab a strawberry drink 🍓 and let's get into it, because this little function is lowkey a baddie.

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🎀 NAME 🎀

nfp_cpp_area_acquire_nonblocking — lock down a CPP area for access. that's it. that's the whole job. iconic behavior honestly 👑

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✨ SYNOPSIS ✨

int nfp_cpp_area_acquire_nonblocking (struct nfp_cpp_area *area );

like, one argument, one return type, no drama. we love a minimal queen 🫶

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🌸 ARGUMENTS 🌸

• area — the CPP area handle. it's your little ticket to the area, you're gonna pass it in and it comes back locked down. periodt.

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💖 DESCRIPTION 💖

so basically this locks down the CPP area for a potential long term activity. like, you're not just popping in for a sec, you're moving in, hanging up fairy lights, the whole thing 🧚

and the rule that is NOT negotiable: the area must always be locked down before being accessed. always. no cap. don't skip this step, don't try to be slick, just lock it first 😭

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💀 NOTE 💀

if no area is available, this returns -EAGAIN. so if you see -EAGAIN you know exactly what's up — nothing free, try again later. ngl that's actually very polite of it 🙈

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⭐ RETURN ⭐

0, or -ERRNO. that's the vibe check: zero means slay, negative errno means something went sideways 🦋

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🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c — go read it, it's right there 💜

and now the full friend group, everyone's invited to the group chat:

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_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_readq(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)

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and that's the page bestie 🫶 the source is ./drivers/net/ethernet/netrono..., dated October 2026, and it's filed under nfp_cpp_area..._nonblocking(9). go lock your area down before you touch anything, i'm literally begging 😭💖