STRUCT ETHTOOL_PAUSEPARAM(9)

🌸 NAME 🌸

okay bestie, welcome to the Kernel API Manual page for struct ethtool_pauseparam(9) — the Ethernet pause (flow control) parameters struct. tiny struct, huge "please chill with the flooding" energy ✨

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✨ SYNOPSIS ✨

she's built like this, fr fr:

struct ethtool_pauseparam {
    __u32 cmd;
    __u32 autoneg;
    __u32 rx_pause;
    __u32 tx_pause;
};

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🧸 Members 🧸

• cmd — the command number, and it's either ETHTOOL_GPAUSEPARAM or ETHTOOL_SPAUSEPARAM. pick your fighter 💅
• autoneg — flag to enable autonegotiation of pause frame use. she negotiates ✨
• rx_pause — flag to enable reception of pause frames. yes bestie, receiving the chill signal 🫶
• tx_pause — flag to enable transmission of pause frames. sending the chill signal right back 💌

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💬 Description 💬

Rule one, no cap: drivers should reject a non-zero setting of autoneg when autoneogotiation is disabled (or not supported) for the link. and yes, the page literally spells it autoneogotiation — iconic typo behavior, but the meaning is autonegotiation 💀

If the link is autonegotiated, drivers should use mii_advertise_flowctrl or similar code to set the advertised pause frame capabilities based on the rx_pause and tx_pause flags, even if autoneg is zero. They should also allow the advertised pause frame capabilities to be controlled directly through the advertising field of struct ethtool_cmd. that's the assignment, bestie 🎀

If autoneg is non-zero, the MAC is configured to send and/or receive pause frames according to the result of autonegotiation. Otherwise, it is configured directly based on the rx_pause and tx_pause flags. periodt 🌈

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👀 SEE ALSO 👀

the extended universe starts in the kernel file ./include/uapi/linux/ethtool.h, and here's every cross-reference, bestie — no skips, no crumbs:

• struct ethtool_cmd(9)
• struct ethtool_drvinfo(9)
• struct ethtool_wolinfo(9)
• struct ethtool_regs(9)
• struct ethtool_eeprom(9)
• struct ethtool_eee(9)
• struct ethtool_modinfo(9)
• struct ethtool_coalesce(9)
• struct ethtool_ringparam(9)
• struct ethtool_channels(9)
• enum ethtool_stringset(9)
• enum ethtool_mac_stats_src(9)
• enum ethtool_module_power_mode_policy(9)
• enum ethtool_module_power_mode(9)
• enum ethtool_c33_pse_ext_state(9)
• enum ethtool_c33_pse_ext_substate_mr_mps_valid(9)
• enum ethtool_c33_pse_ext_substate_error_condition(9)
• enum ethtool_c33_pse_ext_substate_mr_pse_enable(9)
• enum ethtool_c33_pse_ext_substate_option_detect_ted(9)
• enum ethtool_c33_pse_ext_substate_option_vport_lim(9)
• enum ethtool_c33_pse_ext_substate_ovld_detected(9)
• enum ethtool_c33_pse_ext_substate_power_not_available(9)
• enum ethtool_c33_pse_ext_substate_short_detected(9)
• enum ethtool_pse_types(9)
• enum ethtool_c33_pse_admin_state(9)
• enum ethtool_c33_pse_pw_d_status(9)
• enum ethtool_podl_pse_admin_state(9)
• enum ethtool_podl_pse_pw_d_status(9)
• enum ethtool_mm_verify_status(9)
• enum ethtool_module_fw_flash_status(9)
• struct ethtool_gstrings(9)
• struct ethtool_sset_info(9)
• enum ethtool_test_flags(9)
• struct ethtool_test(9)
• struct ethtool_stats(9)
• struct ethtool_perm_addr(9)
• struct ethtool_tcpip4_spec(9)
• struct ethtool_ah_espip4_spec(9)
• struct ethtool_usrip4_spec(9)
• struct ethtool_tcpip6_spec(9)
• struct ethtool_ah_espip6_spec(9)
• struct ethtool_usrip6_spec(9)
• struct ethtool_flow_ext(9)
• struct ethtool_rx_flow_spec(9)
• struct ethtool_rxnfc(9)
• struct ethtool_rxfh_indir(9)
• struct ethtool_rxfh(9)
• struct ethtool_rx_ntuple_flow_spec(9)
• struct ethtool_rx_ntuple(9)
• struct ethtool_dump(9)
• struct ethtool_get_features_block(9)
• struct ethtool_gfeatures(9)
• struct ethtool_set_features_block(9)
• struct ethtool_sfeatures(9)
• struct ethtool_ts_info(9)
• struct ethtool_per_queue_op(9)
• struct ethtool_fecparam(9)
• enum ethtool_fec_config_bits(9)
• struct ethtool_link_settings(9)
• enum phy_upstream(9)

mwah 💋 that's the page, bestie — from ./include/uapi/linux, October 2026, for struct ethtool_pauseparam(9). slay and stay flow-controlled 🫶