t4_query_params_rw(9)

📦 version 7.3.1, in nixpkgs unstable

💖 t4_query_params_rw(9) — like, the FW/device parameter query era 💖

okay so bestie, we're in the Kernel API Manual today and this page is all about t4_query_params_rw — a little function that goes and asks the firmware (or the device itself) "hey what's the value of these params?" no cap, it's giving tiny-but-powerful. let's get into it 🎀

✨ NAME ✨

t4_query_params_rw — query FW or device parameters 🦋

🌸 SYNOPSIS 🌸

int t4_query_params_rw (struct adapter *adap , unsigned int mbox ,
unsigned int pf , unsigned int vf , unsigned int nparams , const u32
*params , u32 *val , int rw , bool sleep_ok );

💅 ARGUMENTS 💅

  • adap — the adapter. literally the whole vibe, our main character 💫
  • mbox — mailbox to use for the FW command. like, which inbox are we sliding into 📬
  • pf — the PF
  • vf — the VF
  • nparams — the number of parameters
  • params — the parameter names. the actual list of what we're asking about 🏷️
  • val — the parameter values. where the answers land, bestie 🫶
  • rw — Write and read flag
  • sleep_ok — if true, we may sleep awaiting mbox cmd completion 😴 (yes, actually sleep — that's the whole point of the flag)

🔥 DESCRIPTION 🔥

Reads the value of FW or device parameters. and the iconic detail: up to 7 parameters can be queried at once — seven. that's the limit. don't be greedy, the firmware said so ✋✨

👑 SEE ALSO 👑

the source lives here, iykyk:

Kernel file ./drivers/net/ethernet/chelsio/cxgb4/t4_hw.c

and here's the whole extended friend group, fr fr — every single one of them:

ok that's the whole page bestie, go query your params (max 7 at a time, respect the limit 💀) and slay 🌈

source/section vibe: ./drivers/net/ethernet/chelsio... · dated October 2026 · and that's the footer, mwah 💋

📦 where this page comes from