igb_read_sfp_data_byte(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 igb_read_sfp_data_byte(9) 🌸

okay so bestie, welcome to the Kernel API Manual — this is the page for igb_read_sfp_data_byte(9), and it's honestly such a little icon. it reads SFP module data, one byte at a time, and yes it's as niche as it sounds 💅 let's get into it.

💖 NAME 💖

igb_read_sfp_data_byte — reads SFP module data. that's it, that's the whole job, and she does it flawlessly fr fr.

✨ SYNOPSIS ✨

s32 igb_read_sfp_data_byte (struct e1000_hw *hw , u16 offset , u8 *data
);

like, three little args and a dream 🎀

🦋 ARGUMENTS 🦋

  • hw — pointer to the HW structure. it's giving "hi here's the hardware, do ur thing" 👑
  • offset — byte location offset to be read. literally telling it which byte you want, no guessing bestie.
  • data — read data buffer pointer. this is where the answer goes when she's done slaying 💫

🌈 DESCRIPTION 🌈

so basically it reads one byte from SFP module data, and that data lives either in the SFP's very own EEPROM memory or in the SFP diagnostic area — depends on the vibe check you give it ✨

and here's the important part, no cap: you gotta call this function with the right wrapper for what you're trying to reach:

  • E1000_I2CCMD_SFP_DATA_ADDR(<byte offset>) — use this one for SFP module database access 🍓
  • E1000_I2CCMD_SFP_DIAG_ADDR(<byte offset>) — use this one for SFP diagnostics parameters access 🩺
like please pick the right one, bestie, it's literally in the function's whole personality 😭

💜 SEE ALSO 💜

first up, the source of truth — the kernel file she lives in:

  • Kernel file ./drivers/net/ethernet/intel/igb/e1000_phy.c

and then the whole friend group, the entire igb phy crew, all 40 of them, all iconic in their own way 🫶:

aaaand that's the page!! mwah 💋 this cutie lives over in ./drivers/net/ethernet/intel/igb and the page itself is dated October 2026 — so yeah, she's from the future, main character energy only 👑✨💖

📦 where this page comes from