idpf_chk_tso_segment(9)

💅 idpf_chk_tso_segment(9) 💅

okay so this is a page from the Kernel API Manual about idpf_chk_tso_segment(9) — and bestie, it's lowkey the vibe check for TSO buffer counts. ✨

🌸 NAME 🌸

idpf_chk_tso_segment — check that skb is not using too many buffers. No cap. 💖

✨ SYNOPSIS ✨

bool idpf_chk_tso_segment (const struct sk_buff *skb , unsigned int
       max_bufs );

🎀 ARGUMENTS 🎀

• skb — the send buffer. That's the packet bestie we're checking. 🦋
• max_bufs — the maximum number of buffers. The limit, the boundary, the rules. 💅

🔥 DESCRIPTION 🔥

Okay so for TSO we need to count the TSO header and the segment payload separately. Because of that, we need to check cases where we have max_bufs-1 fragments or more, since we can potentially require max_bufs+1 DMA transactions: 1 for the TSO header, 1 for the segment payload in the first descriptor, and another max_buf-1 for the fragments. It's giving math, but make it packet math. 🧮✨

Returns true if the packet needs to be software segmented by core stack. Periodt. 💯

🦋 SEE ALSO 🦋

Kernel file: ./drivers/net/ethernet/intel/idpf/idpf_lib.c

The whole idpf bestie squad, all (9) pages, fr fr:

• idpf_init_vector_stack(9)
• idpf_deinit_vector_stack(9)
• idpf_mb_intr_rel_irq(9)
• idpf_intr_rel(9)
• idpf_mb_intr_clean(9)
• idpf_mb_irq_enable(9)
• idpf_mb_intr_req_irq(9)
• idpf_mb_intr_init(9)
• idpf_vector_lifo_push(9)
• idpf_vector_lifo_pop(9)
• idpf_vector_stash(9)
• idpf_req_rel_vector_indexes(9)
• idpf_intr_req(9)
• idpf_del_all_flow_steer_filters(9)
• idpf_find_mac_filter(9)
• __idpf_del_mac_filter(9)
• idpf_del_mac_filter(9)
• __idpf_add_mac_filter(9)
• idpf_add_mac_filter(9)
• idpf_del_all_mac_filters(9)
• idpf_restore_mac_filters(9)
• idpf_remove_mac_filters(9)
• idpf_deinit_mac_addr(9)
• idpf_init_mac_addr(9)
• idpf_cfg_netdev(9)
• idpf_get_free_slot(9)
• idpf_remove_features(9)
• idpf_vport_stop(9)
• idpf_stop(9)
• idpf_decfg_netdev(9)
• idpf_vport_rel(9)
• idpf_vport_dealloc(9)
• idpf_is_hsplit_supported(9)
• idpf_vport_get_hsplit(9)
• idpf_vport_set_hsplit(9)
• idpf_vport_alloc(9)
• idpf_get_stats64(9)
• idpf_statistics_task(9)
• idpf_mbx_task(9)
• idpf_service_task(9)
• idpf_restore_features(9)
• idpf_set_real_num_queues(9)
• idpf_up_complete(9)
• idpf_rx_init_buf_tail(9)
• idpf_vport_open(9)
• idpf_init_task(9)
• idpf_sriov_ena(9)
• idpf_sriov_configure(9)
• idpf_deinit_task(9)
• idpf_check_reset_complete(9)
• idpf_init_hard_reset(9)
• idpf_vc_event_task(9)
• idpf_initiate_soft_reset(9)
• idpf_addr_sync(9)
• idpf_addr_unsync(9)
• idpf_set_rx_mode(9)
• idpf_set_features(9)
• idpf_open(9)
• idpf_change_mtu(9)
• idpf_features_check(9)
• idpf_set_mac(9)

source/version vibes: ./drivers/net/ethernet/intel/idpf, October 2026, for idpf_chk_tso_segment(9) — slay and goodnight! 🎀