[1/6] can: dev: add generic function can_update_bus_error_stats()
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Message ID 20241011162341.606443-1-dario.binacchi@amarulasolutions.com
State New
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Series
  • [1/6] can: dev: add generic function can_update_bus_error_stats()
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Commit Message

Dario Binacchi Oct. 11, 2024, 4:23 p.m. UTC 
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Change-Id: I55e0d86725475fed08e00afaa494973632bba850
---
 drivers/net/can/dev/dev.c | 30 ++++++++++++++++++++++++++++++
 include/linux/can/dev.h   |  1 +
 2 files changed, 31 insertions(+)

Patch
diff mbox series 

diff --git a/drivers/net/can/dev/dev.c b/drivers/net/can/dev/dev.c
index 3797d4de254d..c153015435fe 100644
--- a/drivers/net/can/dev/dev.c
+++ b/drivers/net/can/dev/dev.c
@@ -325,6 +325,36 @@  static int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt,
 	return err;
 }
 
+void can_update_bus_error_stats(struct net_device *dev, struct can_frame *cf)
+{
+	struct can_priv *priv = netdev_priv(dev);
+	bool rx_errors = false, tx_errors = false;
+
+	if (!cf || !(cf->can_id & (CAN_ERR_PROT | CAN_ERR_BUSERROR)))
+		return;
+
+	priv = netdev_priv(dev);
+	priv->can_stats.bus_error++;
+
+	if ((cf->can_id & CAN_ERR_ACK) && (cf->data[3] == CAN_ERR_PROT_LOC_ACK))
+		tx_errors = true;
+	else if (cf->data[2] & (CAN_ERR_PROT_BIT1 | CAN_ERR_PROT_BIT0))
+		tx_errors = true;
+
+	if (cf->data[2] & (CAN_ERR_PROT_FORM | CAN_ERR_PROT_STUFF))
+		rx_errors = true;
+	else if ((cf->data[2] & CAN_ERR_PROT_BIT) &&
+		 (cf->data[3] == CAN_ERR_PROT_LOC_CRC_SEQ))
+		rx_errors = true;
+
+	if (rx_errors)
+		dev->stats.rx_errors++;
+
+	if (tx_errors)
+		dev->stats.tx_errors++;
+}
+EXPORT_SYMBOL_GPL(can_update_bus_error_stats);
+
 static void can_update_state_error_stats(struct net_device *dev,
 					 enum can_state new_state)
 {
diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
index 73199facd5a4..374b6121ea3e 100644
--- a/include/linux/can/dev.h
+++ b/include/linux/can/dev.h
@@ -200,6 +200,7 @@  void can_bus_off(struct net_device *dev);
 
 void can_change_state(struct net_device *dev, struct can_frame *cf,
 		      enum can_state tx_state, enum can_state rx_state);
+void can_update_bus_error_stats(struct net_device *dev, struct can_frame *cf);
 
 void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 		      unsigned int idx);