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
15 struct 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
34 int can_rx_offload_add_timestamp(struct net_device *dev,
35 struct can_rx_offload *offload);
36 int can_rx_offload_add_fifo(struct net_device *dev,
37 struct can_rx_offload *offload,
38 unsigned int weight);
39 int can_rx_offload_add_manual(struct net_device *dev,
40 struct can_rx_offload *offload,
41 unsigned int weight);
42 int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,
43 u64 reg);
44 int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload);
45 int can_rx_offload_queue_timestamp(struct can_rx_offload *offload,
46 struct sk_buff *skb, u32 timestamp);
47 unsigned 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);
50 int can_rx_offload_queue_tail(struct can_rx_offload *offload,
51 struct sk_buff *skb);
52 unsigned int can_rx_offload_get_echo_skb_queue_tail(struct can_rx_offload *offload,
53 unsigned int idx,
54 unsigned int *frame_len_ptr);
55 void can_rx_offload_irq_finish(struct can_rx_offload *offload);
56 void can_rx_offload_threaded_irq_finish(struct can_rx_offload *offload);
57 void can_rx_offload_del(struct can_rx_offload *offload);
58 void can_rx_offload_enable(struct can_rx_offload *offload);
59
can_rx_offload_disable(struct can_rx_offload * offload)60 static 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