wx_write_mbx_pf(9)

📦 version 7.3.1, in nixpkgs unstable

💌 wx_write_mbx_pf(9) — the kernel API manual, but make it cute

okay so bestie, you're reading the manual page for wx_write_mbx_pf from the Kernel API Manual, and honestly? It's a little baddie with one job: it places a message in the mailbox 📬✨ No cap, that's the whole NAME section. Short king behavior, and we respect it.

✨ SYNOPSIS ✨

int wx_write_mbx_pf (struct wx *wx , u32 *msg , u16 size , u16 vf );

literally just the signature, exactly like that, spaces before the commas and all — do not come for me, I'm copying it character for character 🫶

🎀 ARGUMENTS 🎀

  • wx — pointer to the HW structure. it's giving "here's the hardware, please handle her gently" 💅
  • msg — The message buffer. this is the actual note you're dropping in the box 💌
  • size — Length of buffer. gotta tell it how much of msg is real, bestie, no vibes-based guessing 🙈
  • vf — the VF index. which virtual function we're talking to, iykyk 👑

🔥 RETURN 🔥

it returns 0 on success, and -EINVAL/-EBUSY on failure. that's it, that's the whole mood — zero is the slay, the negatives are the "she's not available right now" 😭

ngl, -EBUSY is the universal "try again later, I'm booked and busy" and honestly? same.

🌸 SEE ALSO 🌸

first up, the source herself:

Kernel file ./drivers/net/ethernet/wangxun/libwx/wx_mbx.c

and then the whole friend group, all of them, in order (I'm not skipping a single one, that would be a crime):

the way there's both a _pf and a _vf version of almost everything… it's giving twins energy 👯‍♀️💖

okay and finally, the cute little sign-off: this page came from ./drivers/net/ethernet/wangxun... (yes, it's literally truncated like that in the footer, I refuse to invent the rest 🫶) and it's dated October 2026. stay hydrated, write your mailbox messages responsibly, and remember — 0 on success, bestie. periodt. 💅✨🎀

📦 where this page comes from