can: netlink support for bus-error reporting and counters
This patch makes the bus-error reporting configurable and allows to
retrieve the CAN TX and RX bus error counters via netlink interface.
I have added support for the SJA1000. The TX and RX bus error counters
are also copied to the data fields 6..7 of error messages when state
changes are reported.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/can/netlink.h b/include/linux/can/netlink.h
index c818335..3250de9 100644
--- a/include/linux/can/netlink.h
+++ b/include/linux/can/netlink.h
@@ -70,6 +70,14 @@
};
/*
+ * CAN bus error counters
+ */
+struct can_berr_counter {
+ __u16 txerr;
+ __u16 rxerr;
+};
+
+/*
* CAN controller mode
*/
struct can_ctrlmode {
@@ -77,10 +85,11 @@
__u32 flags;
};
-#define CAN_CTRLMODE_LOOPBACK 0x1 /* Loopback mode */
-#define CAN_CTRLMODE_LISTENONLY 0x2 /* Listen-only mode */
-#define CAN_CTRLMODE_3_SAMPLES 0x4 /* Triple sampling mode */
-#define CAN_CTRLMODE_ONE_SHOT 0x8 /* One-Shot mode */
+#define CAN_CTRLMODE_LOOPBACK 0x01 /* Loopback mode */
+#define CAN_CTRLMODE_LISTENONLY 0x02 /* Listen-only mode */
+#define CAN_CTRLMODE_3_SAMPLES 0x04 /* Triple sampling mode */
+#define CAN_CTRLMODE_ONE_SHOT 0x08 /* One-Shot mode */
+#define CAN_CTRLMODE_BERR_REPORTING 0x10 /* Bus-error reporting */
/*
* CAN device statistics
@@ -106,6 +115,7 @@
IFLA_CAN_CTRLMODE,
IFLA_CAN_RESTART_MS,
IFLA_CAN_RESTART,
+ IFLA_CAN_BERR_COUNTER,
__IFLA_CAN_MAX
};