es58x_can_get_echo_skb(9)

💖 es58x_can_get_echo_skb(9) — Kernel API Manual bestie era ✨

🌸 NAME 🌸

es58x_can_get_echo_skb — Get the skb from the echo FIFO and loop it back locally. 💅

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🦋 SYNOPSIS 🦋

int es58x_can_get_echo_skb (struct net_device *netdev , u32
rcv_packet_idx , u64 *tstamps , unsigned int pkts );

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🎀 ARGUMENTS 🎀

• netdev — CAN network device.
• rcv_packet_idx — Index of the first packet received from the device.
• tstamps — Array of hardware timestamps received from a ES58X device.
• pkts — Number of packets (and so, length of tstamps).

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✨ DESCRIPTION ✨

Okay so bestie, this is the callback function for when we receive a self reception acknowledgment. It retrieves the skb from the echo FIFO, sets its hardware timestamp — the actual time it was sent — and loops it back locally. 🫶

The device has to be active, meaning the network interface is UP and it is not in bus off state or restarting. No cap, it literally has to be active. 😭

Packet indexes must be consecutive. So: index of first packet is rcv_packet_idx, index of second packet is rcv_packet_idx + 1, and index of last packet is rcv_packet_idx + pkts - 1. Periodt. 💀

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🌈 RETURN 🌈

zero on success. ✨

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👑 SEE ALSO 👑

Kernel file: ./drivers/net/can/usb/etas_es58x/es58x_core.c

• es58x_calculate_crc(9)
• es58x_get_crc(9)
• es58x_set_crc(9)
• es58x_check_crc(9)
• es58x_timestamp_to_ns(9)
• es58x_set_skb_timestamp(9)
• es58x_rx_timestamp(9)
• es58x_set_realtime_diff_ns(9)
• es58x_is_can_state_active(9)
• es58x_is_echo_skb_threshold_reached(9)
• es58x_can_free_echo_skb_tail(9)
• es58x_can_get_echo_skb_recovery(9)
• es58x_can_reset_echo_fifo(9)
• es58x_flush_pending_tx_msg(9)
• es58x_tx_ack_msg(9)
• es58x_rx_can_msg(9)
• es58x_rx_err_msg(9)
• es58x_cmd_ret_desc(9)
• es58x_rx_cmd_ret_u8(9)
• es58x_rx_cmd_ret_u32(9)
• es58x_increment_rx_errors(9)
• es58x_handle_urb_cmd(9)
• es58x_check_rx_urb(9)
• es58x_copy_to_cmd_buf(9)
• es58x_split_urb_try_recovery(9)
• es58x_handle_incomplete_cmd(9)
• es58x_split_urb(9)
• es58x_read_bulk_callback(9)
• es58x_write_bulk_callback(9)
• es58x_alloc_urb(9)
• es58x_get_tx_urb(9)
• es58x_submit_urb(9)
• es58x_send_msg(9)
• es58x_alloc_rx_urbs(9)
• es58x_free_urbs(9)
• es58x_open(9)
• es58x_stop(9)
• es58x_xmit_commit(9)
• es58x_xmit_more(9)
• es58x_start_xmit(9)
• es58x_set_mode(9)
• es58x_init_priv(9)
• es58x_init_netdev(9)
• es58x_free_netdevs(9)
• es58x_init_es58x_dev(9)
• es58x_probe(9)
• es58x_disconnect(9)

mwah 💋 stay iconic, bestie — source/version: ./drivers/net/can/usb/etas_es58x; date: October 2026. 🎀