ntb_msg_read(9)

💌 ntb_msg_read(9) — the Kernel API Manual, bestie edition

okay so you found yourself in the ntb_msg_read(9) page of the Kernel API Manual and you're like "what does this even do" — don't worry, I got you, this one is actually so simple and lowkey iconic 🎀

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✨ NAME ✨

ntb_msg_read — read the inbound message register at the index you specify 💅

🌸 SYNOPSIS 🌸

u32 ntb_msg_read (struct ntb_dev *ntb , int *pidx , int midx );

🦋 ARGUMENTS 🦋

• ntb — the NTB device context. like, the device you're working with, obviously 🫶
• pidx — OUT — port index of the peer device that a message got retrieved from. yes bestie it's an out param, so it hands info back to you ✨
• midx — the message register index. the one you want. pick your fave 💖

💜 DESCRIPTION 💜

Read data from the specified message register. That's it, that's the whole vibe. The source port index of a message is retrieved as well, so you get that lil bonus info for free, no cap 😭

🔥 RETURN 🔥

The value of the inbound message register. literally it just gives you the value 💅

⭐ SEE ALSO ⭐

Kernel file ./include/linux/ntb.h — and okay the whole NTB friend group is here, so let's go, one by one, no skipping, periodt:

• 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)
• 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_peer_msg_write(9)
• ntb_get_dma_dev(9)
• ntb_peer_resource_idx(9)
• ntb_peer_highest_mw_idx(9)

iykyk 🌈

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and that's the whole page bestie, you ate that 🍓 mwah 💋

this lil cutie lives in ./include/linux and the version/date stamp on it is October 2026 — so yeah, it's from the future, main character energy fr fr 👑💀

k bye, go read some message registers 💖🦋✨