xcan_start_xmit_fifo(9)

💖 xcan_start_xmit_fifo(9) — the Kernel API Manual, bestie edition 🎀

okay so this is a page from the Kernel API Manual, and it's about xcan_start_xmit_fifo — the lil function that starts the transmission in FIFO mode. yes it's giving "CAN driver internals" and honestly? kind of iconic. let's get into it 💅

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✨ NAME ✨

xcan_start_xmit_fifo — Starts the transmission (FIFO mode) 🚀

like literally, that's its whole job. it kicks off the Tx, FIFO style.

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🌸 SYNOPSIS 🌸

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

so it takes exactly two things and hands you back an int. no cap. 🫶

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🦋 ARGUMENTS 🦋

• skb — the sk_buff pointer that contains the data to be Txed. that's the payload, bestie. the whole reason we're here. 💌
• ndev — pointer to the net_device structure. yup, the network device itself. 👑

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🔥 RETURN 🔥

• 0 on success — we ate. 💅
• -ENOSPC if the FIFO is full 😭 — like, no space, nowhere to put it, the queue said "not today."

fr fr: it returns 0 when it works and -ENOSPC when the FIFO is full. those are the only two outcomes listed, so don't go inventing extra ones. 👀

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💜 SEE ALSO 💜

everything in the xcan cinematic universe, coming in hot — and the kernel file these all live in is ./drivers/net/can/xilinx_can.c together with 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_mailbox(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)

like… that's the whole friend group 😭 every single one. iykyk. 🌈

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aaand that's the page! quick cute sign-off before you go 🧚: this one lives under ./drivers/net/can, dated October 2026, in the xcan_start_xmit_fifo(9) corner of the Kernel API Manual. go forth and transmit, bestie 💖⭐🍓