ENUM NTB_WIDTH(9)

💅 ENUM NTB_WIDTH 💅

okay so bestie, this is enum ntb_width, a kernel manual page (section 9, the kernel API girlies) and it's literally all about the NTB link training width — like how many lanes the link got trained to. no cap, that's the whole vibe. 🎀

✨ SYNOPSIS ✨

enum ntb_width {
    NTB_WIDTH_AUTO ,
    NTB_WIDTH_NONE ,
    NTB_WIDTH_1 ,
    NTB_WIDTH_2 ,
    NTB_WIDTH_4 ,
    NTB_WIDTH_8 ,
    NTB_WIDTH_12 ,
    NTB_WIDTH_16 ,
    NTB_WIDTH_32

};

look at her. nine members, zero notes. 🌸

🫶 CONSTANTS 🫶

okay so every single member, and what it actually means — no skipping, i would never:

• NTB_WIDTH_AUTO — the "just give me the best you got" option 💅 — you're requesting the max supported width.
• NTB_WIDTH_NONE — link is not trained to any width. she's giving nothing. on purpose. 💀
• NTB_WIDTH_1 — link is trained to 1 lane width.
• NTB_WIDTH_2 — link is trained to 2 lane width.
• NTB_WIDTH_4 — link is trained to 4 lane width.
• NTB_WIDTH_8 — link is trained to 8 lane width.
• NTB_WIDTH_12 — link is trained to 12 lane width.
• NTB_WIDTH_16 — link is trained to 16 lane width.
• NTB_WIDTH_32 — link is trained to 32 lane width. main character energy, honestly. 👑

note bestie: these all say "lane width" and not "lanes" — that's the manpage's own wording, i'm just the messenger 💖

🌈 SEE ALSO 🌈

the whole friend group, fr fr — and the kernel file they all live in: ./include/linux/ntb.h

• enum ntb_topo(9)
• enum ntb_speed(9)
• enum ntb_default_port(9)
• struct ntb_client_ops(9)
• struct ntb_ctx_ops(9)
• struct ntb_dev_ops(9)
• struct ntb_client(9)
• struct ntb_dev(9)
• ntb_register_client(9)
• ntb_unregister_client(9)
• ntb_register_device(9)
• ntb_unregister_device(9)
• ntb_set_ctx(9)
• ntb_clear_ctx(9)
• ntb_link_event(9)
• ntb_db_event(9)
• ntb_msg_event(9)
• ntb_default_port_number(9)
• ntb_default_peer_port_count(9)
• ntb_default_peer_port_number(9)
• ntb_default_peer_port_idx(9)
• ntb_port_number(9)
• ntb_peer_port_count(9)
• ntb_peer_port_number(9)
• ntb_logical_port_number(9)
• ntb_peer_logical_port_number(9)
• ntb_peer_port_idx(9)
• ntb_link_is_up(9)
• ntb_link_enable(9)
• ntb_link_disable(9)
• ntb_mw_count(9)
• ntb_mw_get_align(9)
• ntb_mw_set_trans(9)
• ntb_mw_clear_trans(9)
• ntb_peer_mw_count(9)
• ntb_peer_mw_get_addr(9)
• ntb_peer_mw_set_trans(9)
• ntb_peer_mw_clear_trans(9)
• ntb_db_is_unsafe(9)
• ntb_db_valid_mask(9)
• ntb_db_vector_count(9)
• ntb_db_vector_mask(9)
• ntb_db_read(9)
• ntb_db_set(9)
• ntb_db_clear(9)
• ntb_db_read_mask(9)
• ntb_db_set_mask(9)
• ntb_db_clear_mask(9)
• ntb_peer_db_addr(9)
• ntb_peer_db_read(9)
• ntb_peer_db_set(9)
• ntb_peer_db_clear(9)
• ntb_peer_db_read_mask(9)
• ntb_peer_db_set_mask(9)
• ntb_peer_db_clear_mask(9)
• ntb_spad_is_unsafe(9)
• ntb_spad_count(9)
• ntb_spad_read(9)
• ntb_spad_write(9)
• ntb_peer_spad_addr(9)
• ntb_peer_spad_read(9)
• ntb_peer_spad_write(9)
• ntb_msg_count(9)
• ntb_msg_inbits(9)
• ntb_msg_outbits(9)
• ntb_msg_read_sts(9)
• ntb_msg_clear_sts(9)
• ntb_msg_set_mask(9)
• ntb_msg_clear_mask(9)
• ntb_msg_read(9)
• ntb_peer_msg_write(9)
• ntb_get_dma_dev(9)
• ntb_peer_resource_idx(9)
• ntb_peer_highest_mw_idx(9)

that's the whole page bestie, go read ntb.h and slay 💖

✧･ﾟ: * sign-off from the ./include/linux girlies, dated October 2026 — enum ntb_width(9), kernel API manual, periodt ✧･ﾟ: * 🦋