fm10k_pfvf_mbx_init(9)

💅 fm10k_pfvf_mbx_init(9) 💅

okay so welcome to the fm10k_pfvf_mbx_init(9) page, straight out of the Kernel API Manual 🦋 this one's all about getting a mailbox ready for business, and honestly? it's giving "small function, big feelings" energy. let's get into it ✨

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🌸 NAME 🌸

fm10k_pfvf_mbx_init — the function that initializes the mailbox memory for the PF/VF mailbox 💌

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✨ SYNOPSIS ✨

s32 fm10k_pfvf_mbx_init (struct fm10k_hw *hw , struct fm10k_mbx_info
*mbx , const struct fm10k_msg_data *msg_data , u8 id );

like yes bestie it returns an s32, and yes it takes four things. we'll go through them one by one, no skipping 🎀

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💖 ARGUMENTS 💖

• hw — pointer to the hardware structure. your hardware, your homegirl 🫶
• mbx — pointer to the mailbox itself, the main character of this whole page 👑
• msg_data — the handlers for mailbox events. like, who's on call when stuff happens 📞
• id — the ID reference for PF, because it supports up to 64 PF/VF mailboxes. yeah, 64. she's popular 💀

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🌈 DESCRIPTION 🌈

okay so here's the vibe check: this function initializes the mailbox for use 🔥

it takes the buffer you provided and splits it, then uses that split-up buffer to populate both the Tx FIFO and the Rx FIFO — by evenly splitting it. fair and square, no crumbs, no favorites 💅

and here's the part you HAVE to remember, iykyk: to allow for easy masking of head/tail, the value reported in size must be a power of 2, and it's reported in DWORDs, not bytes. literally size said "don't talk to me in bytes" 🎀

⚠️ any invalid values will cause the mailbox to return error. no cap, it will not be cute about it 😭 so double-check that size before you send it off 🧚

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🦋 SEE ALSO 🦋

first up, the source of truth, the kernel file herself:

• Kernel file ./drivers/net/ethernet/intel/fm10k/fm10k_mbx.c 📁

and the whole extended friend group of related pages — every single one, because we don't do "etc." in this house 💜:

fm10k_fifo_init(9), fm10k_fifo_used(9), fm10k_fifo_unused(9), fm10k_fifo_empty(9), fm10k_fifo_head_offset(9), fm10k_fifo_tail_offset(9), fm10k_fifo_head_len(9), fm10k_fifo_head_drop(9), fm10k_fifo_drop_all(9), fm10k_mbx_index_len(9), fm10k_mbx_tail_add(9), fm10k_mbx_tail_sub(9), fm10k_mbx_head_add(9), fm10k_mbx_head_sub(9), fm10k_mbx_pushed_tail_len(9), fm10k_fifo_write_copy(9), fm10k_fifo_enqueue(9), fm10k_mbx_validate_msg_size(9), fm10k_mbx_write_copy(9), fm10k_mbx_pull_head(9), fm10k_mbx_read_copy(9), fm10k_mbx_push_tail(9), fm10k_crc_16b(9), fm10k_fifo_crc(9), fm10k_mbx_update_local_crc(9), fm10k_mbx_verify_remote_crc(9), fm10k_mbx_rx_ready(9), fm10k_mbx_tx_ready(9), fm10k_mbx_tx_complete(9), fm10k_mbx_dequeue_rx(9), fm10k_mbx_enqueue_tx(9), fm10k_mbx_read(9), fm10k_mbx_write(9), fm10k_mbx_create_connect_hdr(9), fm10k_mbx_create_data_hdr(9), fm10k_mbx_create_disconnect_hdr(9), fm10k_mbx_create_fake_disconnect_hdr(9), fm10k_mbx_create_error_msg(9), fm10k_mbx_validate_msg_hdr(9), fm10k_mbx_create_reply(9), fm10k_mbx_reset_work(9), fm10k_mbx_update_max_size(9), fm10k_mbx_connect_reset(9), fm10k_mbx_process_connect(9), fm10k_mbx_process_data(9), fm10k_mbx_process_disconnect(9), fm10k_mbx_process_error(9), fm10k_mbx_process(9), fm10k_mbx_disconnect(9), fm10k_mbx_connect(9), fm10k_mbx_validate_handlers(9), fm10k_mbx_register_handlers(9), fm10k_sm_mbx_create_data_hdr(9), fm10k_sm_mbx_create_connect_hdr(9), fm10k_sm_mbx_connect_reset(9), fm10k_sm_mbx_connect(9), fm10k_sm_mbx_disconnect(9), fm10k_sm_mbx_validate_fifo_hdr(9), fm10k_sm_mbx_process_error(9), fm10k_sm_mbx_create_error_msg(9), fm10k_sm_mbx_receive(9), fm10k_sm_mbx_transmit(9), fm10k_sm_mbx_create_reply(9), fm10k_sm_mbx_process_reset(9), fm10k_sm_mbx_process_version_1(9), fm10k_sm_mbx_process(9), fm10k_sm_mbx_init(9) 🌟

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and that's the page, bestie!! mwah 💋 this lil sign-off comes to you from ./drivers/net/ethernet/intel/f..., dated October 2026, and the page itself is fm10k_pfvf_mbx_init(9) 🎀 go forth, split those buffers evenly, and remember: DWORDs, not bytes 💜