include/linux/can/rx-offload.h

   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
  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 */