ixgbe_flap_t...ispeed_fiber(9)

💅 ixgbe_flap_tx_laser_multispeed_fiber(9) — or, "flap that laser, bestie" ✨

okay so real quick, this is a page from the Kernel API Manual, section 9 (the kernel functions girlies know what's up). The header's all smooshed as ixgbe_flap_t...ispeed_fiber(9) but the actual full function name is ixgbe_flap_tx_laser_multispeed_fiber, and we're gonna get into it 🫶

---

🌸 NAME 🌸

ixgbe_flap_tx_laser_multispeed_fiber — literally flaps the Tx laser. That's it. That's the whole job, and she does it iconically 💅

---

✨ SYNOPSIS ✨

void ixgbe_flap_tx_laser_multispeed_fiber (struct ixgbe_hw *hw );

---

🎀 ARGUMENTS 🎀

• hw — pointer to hardware structure. that's the whole vibe check, just hand her the hardware struct and let her cook 🔥

---

🦋 DESCRIPTION 🦋

so here's the tea ☕ when the driver changes up the link speeds that it can support, it sets autotry_restart to true — like, flagging "bestie we gotta start a whole new autotry session with the link partner, no cap." To actually do that? We set the speed, then we disable and re-enable the tx laser. boom. That's the flap. It's basically tapping the link partner on the shoulder like "hey girl, you need to restart autotry on your end too, iykyk" 💫

And this is lowkey consistent with true clause 37 autoneg, which also involves a loss of signal. so yeah, the signal dips on purpose — that's not a bug, that's the whole point 🙈✨

---

👑 SEE ALSO 👑

Kernel file ./drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c — and honestly the whole 82599 friend group showed up, they all came to the group chat:

• prot_autoc_read_82599(9)
• prot_autoc_write_82599(9)
• ixgbe_init_phy_ops_82599(9)
• ixgbe_get_link_capabilities_82599(9)
• ixgbe_get_media_type_82599(9)
• ixgbe_stop_mac_link_on_d3_82599(9)
• ixgbe_start_mac_link_82599(9)
• ixgbe_disable_tx_laser_multispeed_fiber(9)
• ixgbe_enable_tx_laser_multispeed_fiber(9)
• ixgbe_set_hard_rate_select_speed(9)
• ixgbe_setup_mac_link_smartspeed(9)
• ixgbe_setup_mac_link_82599(9)
• ixgbe_setup_copper_link_82599(9)
• ixgbe_reset_hw_82599(9)
• ixgbe_fdir_check_cmd_complete(9)
• ixgbe_reinit_fdir_tables_82599(9)
• ixgbe_fdir_enable_82599(9)
• ixgbe_init_fdir_signature_82599(9)
• ixgbe_init_fdir_perfect_82599(9)
• ixgbe_atr_compute_sig_hash_82599(9)
• ixgbe_fdir_add_signature_filter_82599(9)
• ixgbe_atr_compute_perfect_hash_82599(9)
• ixgbe_get_fdirtcpm_82599(9)
• ixgbe_read_analog_reg8_82599(9)
• ixgbe_write_analog_reg8_82599(9)
• ixgbe_start_hw_82599(9)
• ixgbe_identify_phy_82599(9)
• ixgbe_enable_rx_dma_82599(9)
• ixgbe_verify_fw_version_82599(9)
• ixgbe_verify_lesm_fw_enabled_82599(9)
• ixgbe_read_eeprom_buffer_82599(9)
• ixgbe_read_eeprom_82599(9)
• ixgbe_reset_pipeline_82599(9)
• ixgbe_read_i2c_byte_82599(9)
• ixgbe_write_i2c_byte_82599(9)

like. the entire roster. main character energy from every single one of them 👑💜

---

and that's the page!! sourced from ./drivers/net/ethernet/intel/i... (the path got cuter with the ellipsis tbh), dated October 2026, page ixgbe_flap_t...ispeed_fiber(9). go flap responsibly, bestie, and remember: the loss of signal is on purpose 🦋💖✨