igb_write_ivar(9)

💅 NAME 💅

okay so bestie, this is igb_write_ivar(9) from the Kernel API Manual, and the name is literally:

igb_write_ivar — configure ivar for given MSI-X vector.

📜 SYNOPSIS 📜

the whole signature vibe check is this, exactly:

void igb_write_ivar (struct e1000_hw *hw , int msix_vector , int index ,
       int offset );

🫶 ARGUMENTS 🫶

• hw — pointer to the HW structure.
• msix_vector — vector number we are allocating to a given ring.
• index — row index of IVAR register to write within IVAR table.
• offset — column offset in IVAR, should be a multiple of 8.

✨ DESCRIPTION ✨

This function is intended to handle the writing of the IVAR register for adapters 82576 and newer. No cap.

The IVAR table consists of 2 columns, each containing a cause allocation for an Rx and Tx ring, and a variable number of rows depending on the number of queues supported. it's giving structured, bestie 💅

🔗 SEE ALSO 🔗

the kernel file link is right here, plus every single function reference — no skipping, periodt:

Kernel file ./drivers/net/ethernet/intel/igb/igb_main.c
igb_get_i2c_data(9), igb_set_i2c_data(9), igb_set_i2c_clk(9),
igb_get_i2c_clk(9), igb_get_hw_dev(9), igb_init_module(9),
igb_exit_module(9), igb_cache_ring_register(9), igb_configure_msix(9),
igb_request_msix(9), igb_free_q_vector(9), igb_reset_q_vector(9),
igb_free_q_vectors(9), igb_clear_interrupt_scheme(9),
igb_set_interrupt_capability(9), igb_alloc_q_vector(9),
igb_alloc_q_vectors(9), igb_init_interrupt_scheme(9),
igb_request_irq(9), igb_irq_disable(9), igb_irq_enable(9),
igb_release_hw_control(9), igb_get_hw_control(9),
igb_config_tx_modes(9), igb_setup_tx_mode(9), igb_configure(9),
igb_power_up_link(9), igb_power_down_link(9), igb_check_swap_media(9),
igb_up(9), igb_set_i2c_bb(9), igb_set_fw_version(9), igb_init_mas(9),
igb_init_i2c(9), igb_probe(9), igb_remove_i2c(9), igb_remove(9),
igb_probe_vfs(9), igb_sw_init(9), __igb_open(9), __igb_close(9),
igb_setup_tx_resources(9), igb_setup_all_tx_resources(9),
igb_setup_tctl(9), igb_configure_tx_ring(9), igb_configure_tx(9),
igb_setup_rx_resources(9), igb_setup_all_rx_resources(9),
igb_setup_mrqc(9), igb_setup_rctl(9), igb_setup_srrctl(9),
igb_configure_rx_ring(9), igb_configure_rx(9), igb_free_tx_resources(9),
igb_free_all_tx_resources(9), igb_clean_tx_ring(9),
igb_clean_all_tx_rings(9), igb_free_rx_resources(9),
igb_free_all_rx_resources(9), igb_clean_rx_ring(9),
igb_clean_all_rx_rings(9), igb_set_mac(9), igb_write_mc_addr_list(9),
igb_set_rx_mode(9), igb_has_link(9), igb_check_lvmmc(9),
igb_watchdog(9), igb_update_ring_itr(9), igb_update_itr(9),
igb_tx_timeout(9), igb_get_stats64(9), igb_change_mtu(9),
igb_update_stats(9), igb_set_uta(9), igb_intr_msi(9), igb_intr(9),
igb_poll(9), igb_clean_tx_irq(9), igb_reuse_rx_page(9),
igb_add_rx_frag(9), igb_is_non_eop(9), igb_cleanup_headers(9),
igb_process_skb_fields(9), igb_alloc_rx_buffers(9), igb_mii_ioctl(9),
igb_ioctl(9), igb_io_error_detected(9), igb_io_slot_reset(9),
igb_io_resume(9), igb_rar_set_index(9), igb_read_i2c_byte(9),
igb_write_i2c_byte(9)

💖 cute sign-off: source/version footer vibes are source ./drivers/net/ethernet/intel/igb, date October 2026 — that's the whole footer, bestie 🫶