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