From: Kurt Van Dijck <dev.kurt@xxxxxxxxxxxxxxxxxxxxxx>
The CAN rx-offload provides a mechanism to rapidly read CAN msgs from
the CAN chip, and queue them before the NAPI will process them in a
softirq.
The current CAN rx-offload only supports a callback that reads the CAN
frame from the chip with its only parameter being a mailbox index.
This commit provides a netif_receive_skb() alike function
"can_rx_offload_receive_skb()" that uses the CAN rx-offload queueing
directly without a callback.
This makes transition easier, especially when more context info is
required which makes the callback method harder.
Signed-off-by: Kurt Van Dijck <dev.kurt@xxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
drivers/net/can/rx-offload.c | 17 +++++++++++++++++
include/linux/can/rx-offload.h | 2 ++
2 files changed, 19 insertions(+)
diff --git a/drivers/net/can/rx-offload.c b/drivers/net/can/rx-offload.c
index e90f11e79ab4..138b8b8e3700 100644
--- a/drivers/net/can/rx-offload.c
+++ b/drivers/net/can/rx-offload.c
@@ -270,6 +270,23 @@ int can_rx_offload_queue_tail(struct can_rx_offload *offload,
}
EXPORT_SYMBOL_GPL(can_rx_offload_queue_tail);
+int can_rx_offload_receive_skb(struct can_rx_offload *offload,
+ struct sk_buff *skb)
+{
+ struct net_device_stats *stats = &offload->dev->stats;
+ int err;
+
+ err = can_rx_offload_queue_tail(offload, skb);
+ if (err) {
+ kfree_skb(skb);
+ stats->rx_errors++;
+ stats->rx_fifo_errors++;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(can_rx_offload_receive_skb);
+
static int can_rx_offload_init_queue(struct net_device *dev,
struct can_rx_offload *offload,
unsigned int weight)
diff --git a/include/linux/can/rx-offload.h b/include/linux/can/rx-offload.h
index cdeb8834382d..c32423318717 100644
--- a/include/linux/can/rx-offload.h
+++ b/include/linux/can/rx-offload.h
@@ -47,6 +47,8 @@ unsigned int can_rx_offload_get_echo_skb(struct can_rx_offload *offload,
unsigned int idx, u32 timestamp);
int can_rx_offload_queue_tail(struct can_rx_offload *offload,
struct sk_buff *skb);
+int can_rx_offload_receive_skb(struct can_rx_offload *offload,
+ struct sk_buff *skb);
void can_rx_offload_del(struct can_rx_offload *offload);
void can_rx_offload_enable(struct can_rx_offload *offload);
--
2.23.0
