ixgbe_validate_rtr(9)

💖 ixgbe_validate_rtr(9) — the Kernel API Manual's cutest little vibe check 💖

okay so bestie, we're in the Kernel API Manual today and this one's a short one, but it matters. It's ixgbe_validate_rtr and honestly it's giving "tiny function, big responsibility" energy. Let's get into it 🫶

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✨ SYNOPSIS ✨

void ixgbe_validate_rtr (struct ixgbe_adapter *adapter , u8 tc );

like, that's it. that's the whole signature. short king 👑

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🎀 ARGUMENTS 🎀

• adapter — pointer to ixgbe_adapter. yeah. the adapter. the main character of this whole operation 💅
• tc — number of traffic classes currently enabled. so like, how many TCs are we actually running with right now, bestie 🌸

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🦋 DESCRIPTION 🦋

so what does it do? it configures a valid 802.1Qp to Rx packet buffer mapping — which lowkey means it confirms that an 802.1Q priority actually maps to a packet buffer that exists. no cap. it's just out here making sure nothing points at a buffer that isn't there 🙈

like, vibe check for your priority-to-buffer mapping. if the mapping's valid, slay. that's the whole job ✨

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

and here's the whole group chat of related functions, fr fr — yes, all of them, i'm not skipping a single one, we don't do that here 💖:

ixgbe_pcie_from_parent(9), ixgbe_read_reg(9), ixgbe_set_ivar(9),
ixgbe_get_vf_idx(9), ixgbe_tx_timeout_reset(9), ixgbe_tx_maxrate(9),
ixgbe_update_tx_ring_stats(9), ixgbe_update_rx_ring_stats(9),
ixgbe_pf_handle_tx_hang(9), ixgbe_vf_handle_tx_hang(9),
ixgbe_check_illegal_queue(9), ixgbe_handle_mdd_event(9),
ixgbe_clean_tx_irq(9), ixgbe_rx_is_fcoe(9), ixgbe_rx_checksum(9),
ixgbe_alloc_rx_buffers(9), ixgbe_process_skb_fields(9),
ixgbe_is_non_eop(9), ixgbe_pull_tail(9), ixgbe_dma_sync_frag(9),
ixgbe_cleanup_headers(9), ixgbe_reuse_rx_page(9), ixgbe_add_rx_frag(9),
ixgbe_clean_rx_irq(9), ixgbe_configure_msix(9), ixgbe_update_itr(9),
ixgbe_write_eitr(9), ixgbe_check_overtemp_subtask(9),
ixgbe_check_phy_fw_load(9), ixgbe_check_module_power(9),
ixgbe_check_link_cfg_err(9), ixgbe_process_link_status_event(9),
ixgbe_handle_link_status_event(9), ixgbe_schedule_fw_event(9),
ixgbe_aci_event_cleanup(9), ixgbe_handle_fw_event(9),
ixgbe_irq_enable(9), ixgbe_poll(9), ixgbe_request_msix_irqs(9),
ixgbe_intr(9), ixgbe_request_irq(9), ixgbe_irq_disable(9),
ixgbe_configure_msi_and_legacy(9), ixgbe_configure_tx_ring(9),
ixgbe_configure_tx(9), ixgbe_rss_indir_tbl_entries(9),
ixgbe_store_key(9), ixgbe_init_rss_key(9), ixgbe_store_reta(9),
ixgbe_store_vfreta(9), ixgbe_configure_rscctl(9), ixgbe_configure_rx(9),
ixgbe_vlan_strip_disable(9), ixgbe_vlan_strip_enable(9),
ixgbe_write_mc_addr_list(9), ixgbe_set_rx_mode(9),
ixgbe_configure_dcb(9), ixgbe_hpbthresh(9), ixgbe_lpbthresh(9),
ixgbe_clean_rx_ring(9), ixgbe_enable_link_status_events(9),
ixgbe_disable_link_status_events(9), ixgbe_sfp_link_config(9),
ixgbe_non_sfp_link_config(9), ixgbe_check_media_subtask(9),
ixgbe_clear_vf_stats_counters(9), ixgbe_clean_tx_ring(9),
ixgbe_clean_all_rx_rings(9), ixgbe_clean_all_tx_rings(9),
ixgbe_set_eee_capable(9), ixgbe_tx_timeout(9), ixgbe_sw_init(9),
ixgbe_setup_tx_resources(9), ixgbe_setup_all_tx_resources(9),
ixgbe_setup_rx_resources(9), ixgbe_setup_all_rx_resources(9),
ixgbe_free_tx_resources(9), ixgbe_free_all_tx_resources(9),
ixgbe_free_rx_resources(9), ixgbe_free_all_rx_resources(9),
ixgbe_max_xdp_frame_size(9), ixgbe_change_mtu(9), ixgbe_open(9),
ixgbe_close(9), ixgbe_update_stats(9), ixgbe_fdir_reinit_subtask(9),
ixgbe_check_hang_subtask(9), ixgbe_watchdog_update_link(9),
ixgbe_watchdog_link_is_up(9), ixgbe_watchdog_link_is_down(9),
ixgbe_watchdog_flush_tx(9), ixgbe_watchdog_subtask(9),
ixgbe_sfp_detection_subtask(9), ixgbe_sfp_link_config_subtask(9),
ixgbe_service_timer(9), ixgbe_check_fw_error(9), ixgbe_service_task(9),
ixgbe_set_mac(9), ixgbe_add_sanmac_netdev(9),
ixgbe_del_sanmac_netdev(9), ixgbe_set_prio_tc_map(9), ixgbe_setup_tc(9),
ixgbe_configure_bridge_mode(9), ixgbe_irq_disable_single(9),
ixgbe_txrx_ring_disable(9), ixgbe_txrx_ring_enable(9),
ixgbe_enumerate_functions(9), ixgbe_wol_supported(9),
ixgbe_set_fw_version_e610(9), ixgbe_set_fw_version(9),
ixgbe_recovery_probe(9), ixgbe_probe(9), ixgbe_remove(9),
ixgbe_io_error_detected(9), ixgbe_io_slot_reset(9), ixgbe_io_resume(9),
ixgbe_init_module(9), ixgbe_exit_module(9)

like, that's the entire extended friend group and every one of them made the list. obsessed 😭💜

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okay and before you go — little sign-off moment 🎀: this page is living at ./drivers/net/ethernet/intel/i... and it's dated October 2026, and the whole thing is filed under ixgbe_validate_rtr(9). that's the source, the version, and the date, bestie — now go validate some mappings 💅✨🌸