nfp_rtsym_read_le(9)

💅 nfp_rtsym_read_le

okay so this is a kernel API page — nfp_rtsym_read_le(9) from the Kernel API Manual, and honestly? she's a little cutie. tiny function, one job, does it well. let's get into it 🎀

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✨ NAME ✨

nfp_rtsym_read_le — read a simple unsigned scalar value from a symbol 💖

like, you give her a symbol name, she goes and fetches the number. that's it. that's the whole vibe.

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🌸 SYNOPSIS 🌸

u64 nfp_rtsym_read_le (struct nfp_rtsym_table *rtbl , const char *name ,
       int *error );

look at that signature. three args, one u64 coming back at you. immaculate. ✨

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🦋 ARGUMENTS 🦋

• rtbl — the NFP RTsym table. this is the main character, the table she's gonna go digging in 🔍
• name — the symbol name. like, which symbol, bestie. be specific 💅
• error — a pointer to an error code, and it's optional 🫶 (also, the original page literally spells it "Poniter" — we're not mad at it, we're just aware. iconic typo energy, no notes 😭)

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🧚 DESCRIPTION 🧚

so here's the whole routine, and it's giving efficiency:

she looks up the symbol, maps it, reads it, and hands you back its value. simple as that. no drama, no side quests.

the value gets interpreted as a simple little-endian unsigned value — so like, byte order matters and she's already handled it for you, you're welcome ✨

and the symbol can be 4 or 8 bytes in size. that's the range. don't come at her with a 3-byte symbol, that's not her era 💀

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🔥 RETURN 🔥

she returns the value that was read. slay 💅

but if something goes wrong? she sets the error and returns ~0ULL. so like, watch for that. that's your "bestie something went wrong" signal, fr fr 🙈

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👑 SEE ALSO 👑

go check out the kernel file right here:

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

and her friends in the rtsym friend group, all iconic, all worth a read:

• nfp_rtsym_count(9)
• nfp_rtsym_get(9)
• nfp_rtsym_lookup(9)
• nfp_rtsym_write_le(9) — yeah, she's got a sibling that writes. different energy entirely 🌈

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ngl the whole thing lives in ./drivers/net/ethernet/netrono... (yes, the path gets truncated, that's just how the footer does her ⭐)

okay that's the page!! and before you go — this little gem came out of the Kernel API Manual, dated October 2026, sourced from ./drivers/net/ethernet/netrono.... remember it fondly. mwah 💋🎀