nfp_xpb_writel(9)

💅 nfp_xpb_writel(9)

okay so bestie, welcome to the kernel API manual page for nfp_xpb_writel — yeah it's a mouthful, i know, but it's literally a tiny little function and it's about to be your new fave 🫶

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✨ NAME ✨

nfp_xpb_writel — write a u32 word to a XPB location, and honestly? slay. that's the whole job. 💖

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🌸 SYNOPSIS 🌸

int nfp_xpb_writel (struct nfp_cpp *cpp , u32 xpb_addr , u32 value );

like look at her. three args, one return type, zero drama. main character energy fr fr ✨

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🎀 ARGUMENTS 🎀

• cpp — the CPP device handle, aka your VIP pass to the device 💳 you gotta hand it over so the function knows which device we're talking to.
• xpb_addr — the address for the operation. this is where you're pointing at, so get it right bestie 🙈
• value — the value to write. the actual u32 word that goes into that spot. this is the payload, the moment, the star of the show ⭐

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🦋 RETURN 🦋

returns 0 on success, or -ERRNO if it goes sideways 😭 so like, zero means we ate and left no crumbs, negative errno means something went wrong and you should probably go read what that errno is saying.

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🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c — yes that's the whole path, no i'm not abbreviating it, we don't do that here 💅

and now the entourage 👑 — every single one of these is linked, no cap:

• 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_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_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. entourage. 💀

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and that's the whole page diva ✨ this one's from ./drivers/net/ethernet/netrono..., dated October 2026 — go forth and write your u32 words, you've got this 💜🧚‍♀️