STRUCT PHYLINK_PCS(9)

💅 struct phylink_pcs(9) — PHYLINK PCS instance

okay so bestie, welcome to the Kernel API Manual ✨ this one's all about struct phylink_pcs — the little struct that's literally the whole personality of a PHYLINK PCS instance 🎀

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✨ SYNOPSIS ✨

struct phylink_pcs {
    unsigned long supported_interfaces[BITS_TO_LONGS(
PHY_INTERFACE_MODE_MAX)];
    const struct phylink_pcs_ops *ops;
    struct phylink *phylink;
    bool poll;
    bool rxc_always_on;
 };

no cap, that's the whole vibe 💖

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🫶 Members (yes, all of them, i don't skip)

• supported_interfaces — this one's the ✨receipts✨: it describes exactly which PHY_INTERFACE_MODE_xxx modes this PCS supports. it's giving "here is my type, respectfully" 💅
• ops — a pointer to the struct phylink_pcs_ops structure. the plug for the actual behavior, iykyk 🔥
• phylink — pointer to struct phylink_config. (yes, fr fr, that's what it says 👀)
• poll — poll the PCS for link changes 🦋 like literally checking in on it, "u good? u connected?"
• rxc_always_on — the MAC driver requires the reference clock to always be on, periodt. Standalone PCS drivers which do not have access to a PHY device can check this instead of PHY_F_RXC_ALWAYS_ON 👑

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🌸 DESCRIPTION 🌸

This structure is designed to be embedded within the PCS private data, and will be passed between phylink and the PCS. it's a whole handoff moment, main character energy ✨

⚠️ vibe check warning: the phylink member is private to phylink and must not be touched by the PCS driver. not even a little. not even to look. hands off bestie 🙈

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🔎 SEE ALSO 🔎

Kernel file ./include/linux/phylink.h — go read it, it's iconic ⭐

• struct phylink_link_state(9)
• struct phylink_config(9)
• struct phylink_mac_ops(9)
• mac_get_caps(9)
• mac_select_pcs(9)
• mac_prepare(9)
• mac_config(9)
• mac_finish(9)
• mac_link_down(9)
• mac_link_up(9)
• mac_disable_tx_lpi(9)
• mac_enable_tx_lpi(9)
• mac_wol_set(9)
• struct phylink_pcs_ops(9)
• pcs_validate(9)
• pcs_inband_caps(9)
• pcs_enable(9)
• pcs_disable(9)
• pcs_get_state(9)
• pcs_config(9)
• pcs_an_restart(9)
• pcs_link_up(9)
• pcs_disable_eee(9)
• pcs_enable_eee(9)
• pcs_pre_init(9)
• phylink_get_link_timer_ns(9)
• phylink_mac_implements_lpi(9)

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okay that's the whole thing, you ate that 🍓 mwah 💋

this page came to you straight from ./include/linux, dated October 2026 — Kernel API Manual realness, slay 💜