tsi721_add_outb_message(9)

📦 version 7.3.1, in nixpkgs unstable

💫 tsi721_add_outb_message — the NAME bit 💫

okay so bestie, this is a page straight out of the Kernel API Manual, section 9, and it's about one very specific little function: tsi721_add_outb_message — the one that adds a message to the Tsi721 outbound message queue. that's it, that's the whole vibe 🎀

✨ SYNOPSIS ✨

like, here's the whole signature, no cap, copy it exactly:

int tsi721_add_outb_message (struct rio_mport *mport , struct rio_dev
*rdev , int mbox , void *buffer , size_t len );

it gives back an int, and yes we will talk about what that int means in a sec 🫶

🌸 ARGUMENTS 🌸

five little besties walk into the function, and every single one of them matters:

  • mport — the master port that has the outbound message queue. this is the port, the main character energy port, the one whose queue we're feeding 💅
  • rdev — the target of the outbound message. like, who is this message even for? it's for rdev.
  • mbox — the outbound mailbox. an int. which mailbox we're sliding this message into 📬
  • buffer — the message itself, the actual thing being added to the outbound queue. void *, so it's giving mysterious-and-flexible ✨
  • len — the length of the message, as a size_t. gotta know how big the thing is, obviously.

💀 RETURN 💀

  • 0 on success 🎉✨
  • -errno value on failure 😭

that's it. that's the return. zero means slay, negative errno means the vibes were off.

🔥 SEE ALSO 🔥

okay this is the part where the manpage name-drops basically the entire friend group. all of these are friends of tsi721_add_outb_message, and the kernel file that hosts them all is ./drivers/rapidio/devices/tsi721.c — here's the whole squad, i'm not skipping a single one:

iykyk 🌈 literally the whole rapidio devices directory said "group photo" and everyone showed up 📸

ok tiny note bestie: that SEE ALSO list is exactly what the page says, so if you need the neighbors, they're all right there. don't make me tap the sign 💅

and that's the whole page! no cap, that's everything 💖 this was tsi721_add_outb_message(9) from the Kernel API Manual, living down in ./drivers/rapidio/devices, dated October 2026 — mwah, love u, go add some outbound messages 🦋✨

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