t7xx_dpmaif_rx_buf_alloc(9)

📦 version 7.3.1, in nixpkgs unstable

💖 t7xx_dpmaif_rx_buf_alloc 💖

okay so bestie, this one's from the kernel API manual — the t7xx_dpmaif_rx_buf_alloc page, to be exact. it's a function that lives in the t7xx driver world and it's literally here to hand out buffers. let's get into it 🎀

✨ NAME ✨

t7xx_dpmaif_rx_buf_alloc — allocate buffers for the BAT ring. that's it, that's the whole vibe 🦋

🌸 SYNOPSIS 🌸

int t7xx_dpmaif_rx_buf_alloc (struct dpmaif_ctrl *dpmaif_ctrl , const
struct dpmaif_bat_request *bat_req , const unsigned int q_num , const
unsigned int buf_cnt , const bool initial );

like… five whole parameters, but ngl it's giving "trust the process" energy 💅

🫶 ARGUMENTS 🫶

  • dpmaif_ctrl — pointer to the DPMAIF context structure. it's the main character, the big picture context for the whole thing 👑
  • bat_req — pointer to the BAT request structure. yes, the BAT request. iconic name, no notes 🦇
  • q_num — the queue number. which queue are we talking about, bestie? this one 🎀
  • buf_cnt — number of buffers to allocate. how many are we grabbing? this many ✨
  • initial — a bool that tells you if the ring is being populated for the first time. like, is this the debut or a comeback? 🌟

🔥 DESCRIPTION 🔥

so what it actually does: it allocates the skb and stores the start address of the data buffer into the BAT ring. two jobs, one function, we love a multitasker 💖

and here's the tea — if this is not the initial call, it notifies the hardware about the new entries. so the hardware gets the memo too. no cap, that part matters 🫡

⭐ RETURN ⭐

  • 0 — success. slay! ✅
  • -ERROR — error code. it's giving "something went wrong" 😭
fr fr, check that return value. don't just assume it worked, bestie 🙈

🦋 SEE ALSO 🦋

the kernel file itself lives at ./drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c — go read it, iykyk 📖

and that's the whole page, bestie 💜 it comes from ./drivers/net/wwan/t7xx, dated October 2026 — so yeah, mark your calendars for that timestamp, it's giving very future-forward of us 🌈✨🎀

📦 where this page comes from