1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * linux/can/rx-offload.h
4 *
5 * Copyright (c) 2014 David Jander, Protonic Holland
6 * Copyright (c) 2014-2017, 2023 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de>
7 */
8
9#ifndef _CAN_RX_OFFLOAD_H
10#define _CAN_RX_OFFLOAD_H
11
12#include <linux/netdevice.h>
13#include <linux/can.h>
14
15struct can_rx_offload {
16	struct net_device *dev;
17
18	struct sk_buff *(*mailbox_read)(struct can_rx_offload *offload,
19					unsigned int mb, u32 *timestamp,
20					bool drop);
21
22	struct sk_buff_head skb_queue;
23	struct sk_buff_head skb_irq_queue;
24	u32 skb_queue_len_max;
25
26	unsigned int mb_first;
27	unsigned int mb_last;
28
29	struct napi_struct napi;
30
31	bool inc;
32};
33
34int can_rx_offload_add_timestamp(struct net_device *dev,
35				 struct can_rx_offload *offload);
36int can_rx_offload_add_fifo(struct net_device *dev,
37			    struct can_rx_offload *offload,
38			    unsigned int weight);
39int can_rx_offload_add_manual(struct net_device *dev,
40			      struct can_rx_offload *offload,
41			      unsigned int weight);
42int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,
43					 u64 reg);
44int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload);
45int can_rx_offload_queue_timestamp(struct can_rx_offload *offload,
46				   struct sk_buff *skb, u32 timestamp);
47unsigned int can_rx_offload_get_echo_skb_queue_timestamp(struct can_rx_offload *offload,
48							 unsigned int idx, u32 timestamp,
49							 unsigned int *frame_len_ptr);
50int can_rx_offload_queue_tail(struct can_rx_offload *offload,
51			      struct sk_buff *skb);
52unsigned int can_rx_offload_get_echo_skb_queue_tail(struct can_rx_offload *offload,
53						    unsigned int idx,
54						    unsigned int *frame_len_ptr);
55void can_rx_offload_irq_finish(struct can_rx_offload *offload);
56void can_rx_offload_threaded_irq_finish(struct can_rx_offload *offload);
57void can_rx_offload_del(struct can_rx_offload *offload);
58void can_rx_offload_enable(struct can_rx_offload *offload);
59
60static inline void can_rx_offload_disable(struct can_rx_offload *offload)
61{
62	napi_disable(&offload->napi);
63}
64
65#endif /* !_CAN_RX_OFFLOAD_H */
66