octeon_mbox_write(9)

💌 octeon_mbox_write(9) — a Kernel API Manual moment

okay so bestie, we're in the Kernel API Manual today, and the star of the show is octeon_mbox_write(9). it's a kernel function, it's giving driver-internals energy, and honestly? it's lowkey iconic. let's get into it 🫶

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✨ NAME ✨

octeon_mbox_write —

and that's... literally it. the description line is empty in the original, bestie. no cap, nothing after the dash. we respect the mystery 💅

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🌸 SYNOPSIS 🌸

int octeon_mbox_write (struct octeon_device *oct , struct
       octeon_mbox_cmd *mbox_cmd );

(it returns an int, because of course it does — this is kernel land, everything returns an int 🧚)

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🎀 ARGUMENTS 🎀

• oct — Pointer Octeon Device. literally just a pointer to the Octeon device, that's the whole vibe ✨
• mbox_cmd — Cmd to send to mailbox. the command you're yeeting into the mailbox 📬

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💖 DESCRIPTION 💖

so what does it actually do? two things, and she does them well:

1. Populates the queue specific mbox structure with cmd information. yes — it fills in the queue-specific mbox struct with all the cmd info 🗂️
2. Write the cmd to mbox register. then it writes that cmd straight to the mbox register 🔥

that's the whole thing. no extra lore, no secret side quests. it populates, then it writes. slay 💅

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c — go read the source, it's right there 👀
• octeon_mbox_read(9)
• octeon_mbox_process_cmd(9)
• octeon_mbox_process_message(9)

all the mailbox besties, linked together like a group chat 🌈

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ngl the whole page is short and sweet — but every single detail is here, fr fr. if you're calling this, you better have a real struct octeon_device * and a real struct octeon_mbox_cmd * in your hands 🙈

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and that's the page, bestie!! mwah 💋 it comes to you from the source/version line ./drivers/net/ethernet/cavium/... and it's dated October 2026 — so go forth and write to that mailbox. periodt. 👑⭐