__igb_access_xmdio_reg(9)

💖 NAME 💖

okay so this is __igb_access_xmdio_reg from the Kernel API Manual — it does exactly one thing and it does it slayfully: read or write an XMDIO register ✨

✨ SYNOPSIS ✨

s32 __igb_access_xmdio_reg (struct e1000_hw *hw , u16 address , u8
dev_addr , u16 *data , bool read );

🎀 ARGUMENTS 🎀

• hw — pointer to the HW structure 💅 like, this is your main character, the whole hardware context, everything hangs off of it
• address — the XMDIO address you're programming 🎯
• dev_addr — the device address you're programming, lowkey the "who am I even talking to" of the whole situation
• data — pointer to the value that gets read from / written to that XMDIO address 🫶 note the spicy detail: it's a pointer, not a plain value, so it travels both ways
• read — a boolean flag telling the function whether this is a read or a write 🌸 that's literally it, that's the whole vibe check: true means read, false means write

🦋 SEE ALSO 🦋

The Kernel file lives right here, bestie — ./drivers/net/ethernet/intel/igb/e1000_i210.c 📁

and the whole i210 friend group, no cap:

• igb_get_hw_semaphore_i210(9)
• igb_acquire_nvm_i210(9)
• igb_release_nvm_i210(9)
• igb_acquire_swfw_sync_i210(9)
• igb_release_swfw_sync_i210(9)
• igb_read_nvm_srrd_i210(9)
• igb_write_nvm_srwr(9)
• igb_write_nvm_srwr_i210(9)
• igb_read_invm_word_i210(9)
• igb_read_invm_i210(9)
• igb_read_invm_version(9)
• igb_validate_nvm_checksum_i210(9)
• igb_update_nvm_checksum_i210(9)
• igb_pool_flash_update_done_i210(9)
• igb_get_flash_presence_i210(9)
• igb_update_flash_i210(9)
• igb_valid_led_default_i210(9)
• igb_read_xmdio_reg(9)
• igb_write_xmdio_reg(9)
• igb_init_nvm_params_i210(9)
• igb_pll_workaround_i210(9)
• igb_get_cfg_done_i210(9)

ngl bestie, if you're calling this directly you're already deep in the i210 trenches — go read the wrapper siblings igb_read_xmdio_reg(9) and igb_write_xmdio_reg(9) first, iykyk 💀

and that's the whole page, periodt 💅 this one's brought to you straight out of ./drivers/net/ethernet/intel/igb, dated October 2026, filed under __igb_access_xmdio_reg(9) — go read it again, it's giving reference material 🔥🦋