sbefifo_submit(9)

💅 sbefifo_submit(9) — like, the Kernel API Manual page, bestie ✨

okay so picture this: you're in the sbefifo corner of the kernel, manual name sbefifo_submit(9), and you need a whole fifo command to go out and a response to come back. that's the vibe. this function is the main character of that whole operation 🫶

✨ SYNOPSIS ✨

int sbefifo_submit (struct device *dev , const __be32 *command , size_t
cmd_len , __be32 *response , size_t *resp_len );

no cap, that's the whole signature. read it, love it, respect it 💖

🎀 ARGUMENTS 🎀

• dev — the sbefifo device. it's giving "which one is this" energy, but it's literally the device you're talking to 🦋
• command — the raw command data. straight up, no chaser, just the bytes 🌸
• cmd_len — how big the command is, and bestie, it's counted in 32-bit words, not bytes. iykyk 💅
• response — the output response buffer. this is where the answer lands ✨
• resp_len — iconic dual-threat parameter: In: the response buffer size, Out: the response size. it goes in knowing one thing and comes out knowing another, main character energy fr fr 👑

💜 DESCRIPTION 💜

this bad boy does the entire operation for you. the whole thing. no half-sends, no "you handle the rest", it ate and left no crumbs 🔥

⚠️ but listen — if the response buffer overflows, it returns -EOVERFLOW. that's the dealbreaker, so size your buffer like you mean it 😭

🦋 SEE ALSO 🦋

• Kernel file ./drivers/fsi/fsi-sbefifo.c — go read the source, it's lowkey iconic 📖

anyway bestie, that's the page! 🌈 this little gem lives over at ./drivers/fsi and it's dated October 2026 — so mark your calendar, screenshot it, send it to the group chat, periodt 💀🎀💖