igb_write_nvm_srwr(9)

📦 version 7.3.1, in nixpkgs unstable

💅 igb_write_nvm_srwr(9) — like, the whole glow-up

okay so bestie, welcome to the Kernel API Manual entry for igb_write_nvm_srwr(9), aka the little function that could, whose whole personality is writing to Shadow Ram using EEWR. yes queen, we're doing hardware-level NVM writes today and we're gonna understand every crumb. 🫶

✨ NAME ✨

igb_write_nvm_srwr — Write to Shadow Ram using EEWR 🌸

✨ SYNOPSIS ✨

s32 igb_write_nvm_srwr (struct e1000_hw *hw , u16 offset , u16 words ,
u16 *data );

🎀 ARGUMENTS 🎀

  • hw — pointer to the HW structure. it's giving main character energy: everything else comes through here 💅
  • offset — offset within the Shadow Ram to be written to. lowkey where the magic happens, fr fr
  • words — number of words to write. so not one, not two, exactly as many as you say 👑
  • data — 16 bit word(s) to be written to the Shadow Ram. the actual payload, the icon, the moment ⭐

💖 DESCRIPTION 💖

Writes data to Shadow Ram at offset using the EEWR register. that's it, that's the whole vibe — no cap. ✨

🚨 okay so listen: if igb_update_nvm_checksum is not called after this function, the Shadow Ram will most likely contain an invalid checksum. i'm literally not being dramatic, it's right there in the doc 😭 so call it. please. for me. 🥺

🦋 SEE ALSO 🦋

kernel file: ./drivers/net/ethernet/intel/igb/e1000_i210.c — the homeland, the source, the origin story 🏠

and the whole friend group, ok i'm obsessed with how many of them there are, every single one gets their flowers 💐:

aaaand that's the whole page, periodt. 💜

this little masterpiece lives in ./drivers/net/ethernet/intel/igb, dates all the way back to October 2026, and it's filed under igb_write_nvm_srwr(9) in the Kernel API Manual — go read it again, iykyk, bye bestie, mwah 😘💖

📦 where this page comes from