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can: rx-offload: add can_rx_offload_get_echo_skb_queue_tail()

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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: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde 2023-07-03 18:18:19 +02:00
parent 2e3df4a3b3
commit 8e0e2950c9
2 changed files with 30 additions and 2 deletions
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27
drivers/net/can/dev/rx-offload.c
View File

@ -1,7 +1,7 @@
// 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;

5
include/linux/can/rx-offload.h
View File

@ -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);