xcan_start_xmit_mailbox(9)

💌 xcan_start_xmit_mailbox(9) — Kernel API Manual, section 9 bestie

okay so welcome to the Kernel API Manual, section 9, and today's main character is xcan_start_xmit_mailbox — yes she's the mailbox mode transmission starter and she is literally so iconic for it 💅 this page is short but she ate, no cap.

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✨ NAME ✨

xcan_start_xmit_mailbox — starts the transmission (mailbox mode) 🎀

like, that's the whole vibe: she kicks off the Tx, but the mailbox mode way specifically. don't @ me.

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🦋 SYNOPSIS 🦋

int xcan_start_xmit_mailbox (struct sk_buff *skb , struct net_device
*ndev );

that's the whole signature, copy it exactly please, spaces and all, she's sensitive 🙈

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🌸 ARGUMENTS 🌸

• skb — the sk_buff pointer that contains the data to be Txed, i.e. the actual payload gossip she's about to send out 🫶
• ndev — pointer to the net_device structure, the network-device bestie in question

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🔥 RETURN 🔥

• 0 on success — slay, the transmission started, we love to see it 👑
• -ENOSPC if there is no space — literally the "no room bestie" error, she tried and there was just no space 😭

fr fr, if you get -ENOSPC back, that's your sign: no space. not a vibe check fail on your part, just the facts.

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⭐ SEE ALSO ⭐

Kernel file ./drivers/net/can/xilinx_can.c, plus the whole extended friend group:

• struct xcan_priv(9)
• xcan_write_reg_le(9)
• xcan_read_reg_le(9)
• xcan_write_reg_be(9)
• xcan_read_reg_be(9)
• xcan_rx_int_mask(9)
• set_reset_mode(9)
• xcan_set_bittiming(9)
• xcan_chip_start(9)
• xcan_do_set_mode(9)
• xcan_write_frame(9)
• xcan_start_xmit_fifo(9)
• xcan_start_xmit(9)
• xcan_rx(9)
• xcanfd_rx(9)
• xcan_current_error_state(9)
• xcan_set_error_state(9)
• xcan_update_error_state_after_rxtx(9)
• xcan_err_interrupt(9)
• xcan_state_interrupt(9)
• xcan_rx_fifo_get_next_frame(9)
• xcan_rx_poll(9)
• xcan_tx_interrupt(9)
• xcan_interrupt(9)
• xcan_chip_stop(9)
• xcan_open(9)
• xcan_close(9)
• xcan_get_berr_counter(9)
• xcan_get_auto_tdcv(9)
• xcan_suspend(9)
• xcan_resume(9)
• xcan_runtime_suspend(9)
• xcan_runtime_resume(9)
• xcan_probe(9)
• xcan_remove(9)

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okay that's the whole page, go read the source and stan 🧚

💖 cute little sign-off: this one lives in ./drivers/net/can, it's dated October 2026, and yes the page you just read is xcan_start_xmit_mailbox(9) — periodt. 🍓