nfp_xpb_readl(9)

💅 nfp_xpb_readl 💅

okay bestie, welcome to the Kernel API Manual ✨ — we're doing nfp_xpb_readl(9) today and honestly it's a whole vibe. it's giving "tiny little helper function that just wants to read a u32 word from a XPB location" and we respect it for that 🫶

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🌸 NAME 🌸

nfp_xpb_readl — Read a u32 word from a XPB location

like. that's it. that's the whole job. read one (1) u32 word. iconic behavior, no notes 💅

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✨ SYNOPSIS ✨

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

yes the spacing is exactly like that, don't come for me, this is verbatim bestie 😭

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🎀 ARGUMENTS 🎀

• cpp — the CPP device handle 💖 like, your ticket into the whole CPP situation
• xpb_addr — the Address for the operation 📍 where we're going, basically
• value — Pointer to the read buffer 🧺 your little basket where the answer lands

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🔥 RETURN 🔥

0 on success, or -ERRNO 😭

so like... zero means slay, and anything negative means the universe said no. check your errnos, bestie, they're telling you something fr fr

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🌈 SEE ALSO 🌈

the Kernel file:

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

and now, the extended cinematic universe 👑 — every single one of these, no skipping, we don't do that here:

• 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_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. that's a lot of friends. main character energy in the SEE ALSO section honestly 🦋

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ngl bestie, if your read fails you get -ERRNO back so pls actually check the return value instead of just vibing 🙈

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and that's the whole page!! sourced from ./drivers/net/ethernet/netrono... and dated October 2026 — so yeah, future icon behavior 💜 bye bestie, go read those u32 words 🌸✨🎀