igc_read_xmdio_reg(9)

💅 igc_read_xmdio_reg(9) 💅

okay so this is a page from the Kernel API Manual, bestie — yes we're in kernel-doc land now, and no cap, this one's actually cute and small.

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✨ NAME ✨

igc_read_xmdio_reg — read an XMDIO register 🎀

literally what it says on the tin. you hand it an address, it goes and fetches the register value for you. slay. 🦋

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🌸 SYNOPSIS 🌸

s32 igc_read_xmdio_reg (struct igc_hw *hw , u16 addr , u8 dev_addr , u16
*data );

that's the whole signature, no notes 🔥

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💖 ARGUMENTS 💖

• hw — pointer to the HW structure. it's your hardware handle, the main character of the whole call. 🫶
• addr — the XMDIO address to program. this is the where, and you gotta give it a real one, okay? 📍
• dev_addr — device address to program. yep, a second address — think of it as which device on the bus we're talking to. 💅
• data — value to be read from the EMI address. it's a pointer, so the read result lands here and you get to go look at it. ⭐

ngl the four args are just: which hw, which address, which device, and where do i put the answer. that's it. that's the whole vibe check. 😭

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🦋 SEE ALSO 🦋

Kernel file ./drivers/net/ethernet/intel/igc/igc_phy.c — that's where the source actually lives, iykyk 🧚

and now the whole friend group, in the order the page gives them, no skipping, periodt:

• igc_check_reset_block(9)
• igc_get_phy_id(9)
• igc_phy_has_link(9)
• igc_power_up_phy_copper(9)
• igc_power_down_phy_copper(9)
• igc_check_downshift(9)
• igc_phy_hw_reset(9)
• igc_phy_setup_autoneg(9)
• igc_wait_autoneg(9)
• igc_copper_link_autoneg(9)
• igc_setup_copper_link(9)
• igc_read_phy_reg_mdic(9)
• igc_write_phy_reg_mdic(9)
• __igc_access_xmdio_reg(9)
• igc_write_xmdio_reg(9)
• igc_write_phy_reg_gpy(9)
• igc_read_phy_reg_gpy(9)
• igc_read_phy_fw_version(9)
• igc_force_speed_duplex(9)

lowercase tip from me to you: igc_write_xmdio_reg(9) is literally the sibling of this one — one reads, one writes. __igc_access_xmdio_reg(9) is the one hiding behind the register with double underscores, the little lowkey helper. 👑

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okay that's the page!! shoutout to the kernel API manual, source <rainbow>./drivers/net/ethernet/intel/igc</rainbow>, dated October 2026 — mwah, love that for us 💜🦋✨ go read some registers bestie, you got this 🫶🎀