i40e_buildreg_itr(9)

📦 version 7.3.1, in nixpkgs unstable

Bestie, we’re looking at the i40e_buildreg_itr(9) page from the Kernel API Manual, and it’s literally all about building a value for writing to the I40E_PFINT_DYN_CTLN register. 💅✨

🎀 NAME 🎀

i40e_buildreg_itr — build a value for writing to I40E_PFINT_DYN_CTLN register.

⭐ SYNOPSIS ⭐

Here’s the exact signature, bestie — keep it character-for-character:

u32 i40e_buildreg_itr (enum i40e_dyn_idx itr_idx , u16 interval , bool
       force_swint );

🦋 ARGUMENTS 🦋

  • itr_idx — the interrupt throttling index. That’s the vibe.
  • interval — the interrupt throttling interval value in usecs. 🫶
  • force_swint — force software interrupt. Simple as that.

👑 DESCRIPTION 👑

Okay so here’s the tea: this function builds a value for the I40E_PFINT_DYN_CTLN register, and that value is used to update the interrupt throttling interval for the specified ITR index and, optionally, to enforce a software interrupt. 💖

Now the conditionals, because they matter: if itr_idx is equal to I40E_ITR_NONE, then no interval change is applied, and only the force_swint parameter is taken into account. 🫶

And if the interval change and enforced software interrupt are not requested, then the built value just enables the appropriate vector interrupt. That’s the whole flow, no cap. ✨

🌈 SEE ALSO 🌈

Kernel file ./drivers/net/ethernet/intel/i40e/i40e_txrx.c is in the group chat too, along with the whole i40e friend group:

And that’s the page, bestie! 🫶 This one’s from the Kernel API Manual, with source/version path ./drivers/net/ethernet/intel/i40e, dated October 2026, and it’s literally the i40e_buildreg_itr(9) page. Slay. 💅✨

📦 where this page comes from