compute_mps_bg_map(9)

📦 version 7.3.1, in nixpkgs unstable

💅 compute_mps_bg_map(9) — like, the Kernel API Manual, bestie ✨

okay so we're in the 9 section of the kernel API manual today and the star of the show is compute_mps_bg_map, which is genuinely such a little icon. it computes the MPS Buffer Group Map for a Port. that's the whole vibe. no cap. 🎀

🌸 NAME 🌸

compute_mps_bg_map — computes the MPS Buffer Group Map for a Port, and honestly? she ate. 👑

✨ SYNOPSIS ✨

unsigned int compute_mps_bg_map (struct adapter *adapter , int pidx );

like literally that's it, that's the whole call. two args, one unsigned int coming back at you. 🦋

💖 ARGUMENTS 💖

  • adapter — the adapter. yes bestie, the adapter. your whole nic situation lives in here. 🫶
  • pidx — the port index. which port we're talking about, like a little name tag at a party. 🌸

🔥 DESCRIPTION 🔥

so what she does is: computes and returns a bitmap indicating which MPS buffer groups are associated with the given Port. that's the tea. ☕

and the bitmap rules are cute and simple: bit i is set if buffer group i is used by the Port. that's it. bit set = that group belongs to this port. bit clear = not yours, girl. 💅

ngl the whole function is basically a vibe check for buffer groups — she looks at the port and goes "okay which of y'all are with her" and hands you back a bitmap. iconic behaviour, zero notes. 🌈

🦋 SEE ALSO 🦋

the kernel file where all this magic lives: ./drivers/net/ethernet/chelsio/cxgb4/t4_hw.c — go read it, iykyk 📖

and now, the extended friend group (yes, all of them, i'm not skipping a single one, we don't do that here 💀):

like… that's a lot of friends and every single one of them made the list. we respect the whole roster. 🫡💜

and that's the page, bestie!! 🎀✨ source: ./drivers/net/ethernet/chelsio..., dated October 2026, and the whole thing is filed under compute_mps_bg_map(9) — see you in the next manpage, mwah 💋🦋

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