igb_phy_forc...d_duplex_m88(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME 💖

igb_phy_force_speed_duplex_m88 — the function that forces speed/duplex for the m88 PHY, and yes bestie it's as iconic as it sounds ✨

okay so real quick before we dive in — this is from the Kernel API Manual section, page igb_phy_forc...d_duplex_m88(9) (the title got cut off, we love a dramatic ellipsis 💅). Let's get into it.

🦋 SYNOPSIS 🦋

s32 igb_phy_force_speed_duplex_m88 (struct e1000_hw *hw );

🌸 ARGUMENTS 🌸

  • hw — pointer to the HW structure. that's it. that's the whole arg list. one (1) pointer, and it's giving main character energy 👑

✨ DESCRIPTION ✨

okay so here's the tea 🍓 — this function calls the PHY setup function to, you guessed it, force speed and duplex. no vibes-based negotiation here, we're forcing it, periodt.

then it clears the auto-crossover so MDI gets forced manually. manual mode only, no cap. 🙈

after that it resets the PHY to commit the changes — like hitting save, but for hardware 💾✨

and here's the part where you gotta pay attention: if time expires while waiting for link up, we reset the DSP. yes, really. time runs out, DSP gets reset, that's the deal. 😭

after the reset, TX_CLK and CRS on TX must be set — like, mandatory, not optional, don't skip this step bestie 🫶

then: return successful upon successful completion, else return the corresponding error code. that's the whole return situation. slay.

🎀 SEE ALSO 🎀

first up, the actual kernel file this cutie lives in — literally go read it:

./drivers/net/ethernet/intel/igb/e1000_phy.c

and now the friend group 💜 (all of these are (9) pages btw, iykyk):

like, that's the whole extended universe 🌈 go click around, it's fine, i'll wait.

and that's the page!! 🎉 sourced straight from ./drivers/net/ethernet/intel/igb, dated October 2026 — so mark your calendars, bestie, this manual page is from the future 💀✨ mwah, love u, go force some duplex 🫶💖

📦 where this page comes from