Commit 8e0e2950 authored by Marc Kleine-Budde's avatar Marc Kleine-Budde
Browse files

can: rx-offload: add can_rx_offload_get_echo_skb_queue_tail() 

Add can_rx_offload_get_echo_skb_queue_tail(). This function addds the
echo skb at the end of rx-offload the queue. This is intended for
devices without timestamp support.

Link: https://lore.kernel.org/all/20230718-gs_usb-rx-offload-v2-2-716e542d14d5@pengutronix.de


Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent 2e3df4a3

drivers/net/can/dev/rx-offload.c

+26 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/* Copyright (c) 2014      Protonic Holland,

 *                         David Jander

 * Copyright (C) 2014-2021 Pengutronix,

 * Copyright (C) 2014-2021, 2023 Pengutronix,

 *                         Marc Kleine-Budde <kernel@pengutronix.de>

 */
@@ -280,6 +280,31 @@ int can_rx_offload_queue_tail(struct can_rx_offload *offload, 
}

EXPORT_SYMBOL_GPL(can_rx_offload_queue_tail);



unsigned int

can_rx_offload_get_echo_skb_queue_tail(struct can_rx_offload *offload,

				       unsigned int idx,

				       unsigned int *frame_len_ptr)

{

	struct net_device *dev = offload->dev;

	struct net_device_stats *stats = &dev->stats;

	struct sk_buff *skb;

	unsigned int len;

	int err;



	skb = __can_get_echo_skb(dev, idx, &len, frame_len_ptr);

	if (!skb)

		return 0;



	err = can_rx_offload_queue_tail(offload, skb);

	if (err) {

		stats->rx_errors++;

		stats->tx_fifo_errors++;

	}



	return len;

}

EXPORT_SYMBOL_GPL(can_rx_offload_get_echo_skb_queue_tail);



void can_rx_offload_irq_finish(struct can_rx_offload *offload)

{

	unsigned long flags;

include/linux/can/rx-offload.h

+4 −1
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
 * linux/can/rx-offload.h

 *

 * Copyright (c) 2014 David Jander, Protonic Holland

 * Copyright (c) 2014-2017 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de>

 * Copyright (c) 2014-2017, 2023 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de>

 */



#ifndef _CAN_RX_OFFLOAD_H
@@ -49,6 +49,9 @@ unsigned int can_rx_offload_get_echo_skb_queue_timestamp(struct can_rx_offload * 
							 unsigned int *frame_len_ptr);

int can_rx_offload_queue_tail(struct can_rx_offload *offload,

			      struct sk_buff *skb);

unsigned int can_rx_offload_get_echo_skb_queue_tail(struct can_rx_offload *offload,

						    unsigned int idx,

						    unsigned int *frame_len_ptr);

void can_rx_offload_irq_finish(struct can_rx_offload *offload);

void can_rx_offload_threaded_irq_finish(struct can_rx_offload *offload);

void can_rx_offload_del(struct can_rx_offload *offload);