ntb_peer_db_clear(9)

🎀 ntb_peer_db_clear(9) 🎀

okay bestie, welcome to the Kernel API Manual page for ntb_peer_db_clear. This is the NTB doorbell-clearening function, and we're gonna get you cozy with it. 💅✨

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💖 NAME 💖

ntb_peer_db_clear — clear bits in the peer doorbell register.

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⚡ SYNOPSIS ⚡

The whole signature, character-for-character, periodt:

int ntb_peer_db_clear (struct ntb_dev *ntb , u64 db_bits );

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🌸 ARGUMENTS 🌸

• ntb — NTB device context. That's the main-character device struct, bestie.
• db_bits — Doorbell bits to clear. The exact bits you're cleaning up.

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🦋 DESCRIPTION 🦋

Okay so here's the vibe: this clears bits in the peer doorbell register, arming the bits for the next doorbell.

⚠️ Bestie, this is unusual, and hardware may not support it. Not every chip is gonna slay this one, no cap. 💀

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🌈 RETURN 🌈

Returns zero on success, otherwise an error number. Periodt.

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👑 SEE ALSO 👑

Kernel file: ./include/linux/ntb.h

The whole NTB friend group, in order:

• 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_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)

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mwah 💋 — with love from source/version ./include/linux, dated October 2026. Bye bestie, go clear those doorbell bits! 🫶✨