ntb_msg_inbits(9)
π ntb_msg_inbits β a whole man page, bestie
okay so picture this: it's ntb_msg_inbits(9), from the Kernel API Manual, and it's literally the girl who tells you which inbound message registers are popping off. she's short, she's sweet, she's a one-liner, and honestly? iconic. let's get into it π
β¨ NAME β¨
ntb_msg_inbits β get a bitfield of inbound message registers status π
like, the whole personality is right there in the name, no notes.
πΈ SYNOPSIS πΈ
u64 ntb_msg_inbits (struct ntb_dev *ntb );
one function, one arg, one u64 coming back at you. short and slay, we love a low-effort baddie π¦
π ARGUMENTS π
ntbβ NTB device context. yes bestie, you gotta hand her the device context, that's the whole point. no device, no vibes π
π§ DESCRIPTION π§
so what does she do? she returns the bitfield of status and mask registers that are related to inbound message registers. that's it. that's the whole lore. she's not doing side quests, she's not starting drama, she's just handing you the bitfield and minding her business π«Ά
think of it like a vibe check for inbound message registers β status and mask ones specifically, all bundled into one bitfield for you. main character energy, zero effort required β¨
π RETURN π
the bitfield of inbound message registers. that's the return value, that's the gift, that's the u64 you asked for π
π SEE ALSO π
okay this part is lowkey a lot β she's got a whole extended friend group and you're gonna meet every single one of them, no skipping π
first up, the source of truth:
- the kernel file
./include/linux/ntb.hπ
π the enums and structs (the core cast)
enum ntb_topo(9)enum ntb_speed(9)enum ntb_width(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)
π¦ registering & context (the admin girlies)
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)
π ports & links (the social network)
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)
π memory windows (the real estate girlies)
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)
π₯ doorbells (ring ring, bestie)
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)
π§ scratchpads (the note-passing girlies)
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)
π messages (her actual inner circle)
ntb_msg_count(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)
β the misc icons
ngl bestie this page is basically one function and a massive contact list. read the friends too, iykyk ππ
and that's the whole page, periodt. shoutout to the source location ./include/linux and the date October 2026 β that's where this beauty lives, mwah πβ¨
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms