t7xx_cldma_send_skb(9)

📦 version 7.3.1, in nixpkgs unstable

💅 t7xx_cldma_send_skb(9) — like, the whole kernel API manual page, bestie

okay so real talk: this is a page from the Kernel API Manual, and it's about one little function that yeets control data at the modem. her name is t7xx_cldma_send_skb, and she's lowkey carrying the whole "pls wake up and take my packet" situation. let's get into it 🫶

✨ NAME ✨

t7xx_cldma_send_skb — send control data to modem. that's it, that's the gig, and she does it every time without complaining. iconic.

🌸 SYNOPSIS 🌸

int t7xx_cldma_send_skb (struct cldma_ctrl *md_ctrl , int qno , struct
       sk_buff *skb );

returns an int bestie — so yeah, you're gonna want to actually check that return value. just saying. 👀

🎀 ARGUMENTS 🎀

  • md_ctrl — the CLDMA context structure. this is her emotional support struct, she needs it for everything.
  • qno — queue number. which queue are we sliding into? that one. ✨
  • skb — socket buffer. the actual packet, the payload, the main character of this whole operation.

💖 RETURN 💖

she hands you back an int and it always means something, so pls don't ignore her:

  • 0 — Success. slay!! we love a clean win 💅✨
  • -ENOMEM — Allocation failure. ran out of memory, tragic, no cap 😭
  • -EINVAL — Invalid queue request. you asked for a queue that does not exist and she is not entertaining it 🙈
  • -EIO — Queue is not active. the queue is literally asleep, not responding, closed for business 💀
  • -ETIMEDOUT — Timeout waiting for the device to wake up. she waited, she knocked, nobody came to the door. rude. ⏰

🦋 SEE ALSO 🦋

the kernel file herself:

Kernel file ./drivers/net/wwan/t7xx/t7xx_hif_cldma.c

and her whole friend group, go say hi:

ngl bestie, if you're reading this page you're probably deep in WWAN driver land at 2am. hydrate. 🌈

okay that's the whole page!! 🧚 from ./drivers/net/wwan/t7xx, dated October 2026 — and yeah, that's the source/version and date, folded in all cute at the end instead of as a boring footer line. mwah. 💜🎀

📦 where this page comes from