net: hns3: Add handling of MAC tunnel interruption

MAC tnl interruptions are different from other type of RAS and MSI-X
errors, because some bits, such as OVF/LR/RF will occur during link up
and down.

The drivers should clear status of all MAC tnl interruption bits but
shouldn't print any message that would mislead the users.

In case that link down and re-up in a short time because of some reasons,
we record when they occurred, and users can query them by debugfs.

Signed-off-by: Weihang Li <liweihang@hisilicon.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
index 6726b0150bdd..4aba6248965d 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
@@ -7,6 +7,7 @@
 #include <linux/types.h>
 #include <linux/phy.h>
 #include <linux/if_vlan.h>
+#include <linux/kfifo.h>
 
 #include "hclge_cmd.h"
 #include "hnae3.h"
@@ -660,6 +661,12 @@ struct hclge_rst_stats {
 	u32 reset_cnt;		/* the number of reset */
 };
 
+/* time and register status when mac tunnel interruption occur */
+struct hclge_mac_tnl_stats {
+	u64 time;
+	u32 status;
+};
+
 /* For each bit of TCAM entry, it uses a pair of 'x' and
  * 'y' to indicate which value to match, like below:
  * ----------------------------------
@@ -686,6 +693,7 @@ struct hclge_rst_stats {
 		(y) = (_k_ ^ ~_v_) & (_k_); \
 	} while (0)
 
+#define HCLGE_MAC_TNL_LOG_SIZE	8
 #define HCLGE_VPORT_NUM 256
 struct hclge_dev {
 	struct pci_dev *pdev;
@@ -802,6 +810,9 @@ struct hclge_dev {
 	struct mutex umv_mutex; /* protect share_umv_size */
 
 	struct mutex vport_cfg_mutex;   /* Protect stored vf table */
+
+	DECLARE_KFIFO(mac_tnl_log, struct hclge_mac_tnl_stats,
+		      HCLGE_MAC_TNL_LOG_SIZE);
 };
 
 /* VPort level vlan tag configuration for TX direction */