net: hns3: add support for FD counter in debugfs

Previously, the flow director counter is not enabled. To improve the
maintainability for chechking whether flow director hit or not, enable
flow director counter for each function, and add debugfs query inerface
to query the counters for each function.

The debugfs command is below:
cat fd_counter
func_id    hit_times
pf         0
vf0        0
vf1        0

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
index 6fc50d09b9db..b69c54d365a7 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
@@ -1549,6 +1549,39 @@ out:
 	return ret;
 }
 
+static int hclge_dbg_dump_fd_counter(struct hclge_dev *hdev, char *buf, int len)
+{
+	u8 func_num = pci_num_vf(hdev->pdev) + 1; /* pf and enabled vf num */
+	struct hclge_fd_ad_cnt_read_cmd *req;
+	char str_id[HCLGE_DBG_ID_LEN];
+	struct hclge_desc desc;
+	int pos = 0;
+	int ret;
+	u64 cnt;
+	u8 i;
+
+	pos += scnprintf(buf + pos, len - pos,
+			 "func_id\thit_times\n");
+
+	for (i = 0; i < func_num; i++) {
+		hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_FD_CNT_OP, true);
+		req = (struct hclge_fd_ad_cnt_read_cmd *)desc.data;
+		req->index = cpu_to_le16(i);
+		ret = hclge_cmd_send(&hdev->hw, &desc, 1);
+		if (ret) {
+			dev_err(&hdev->pdev->dev, "failed to get fd counter, ret = %d\n",
+				ret);
+			return ret;
+		}
+		cnt = le64_to_cpu(req->cnt);
+		hclge_dbg_get_func_id_str(str_id, i);
+		pos += scnprintf(buf + pos, len - pos,
+				 "%s\t%llu\n", str_id, cnt);
+	}
+
+	return 0;
+}
+
 int hclge_dbg_dump_rst_info(struct hclge_dev *hdev, char *buf, int len)
 {
 	int pos = 0;
@@ -2375,6 +2408,10 @@ static const struct hclge_dbg_func hclge_dbg_cmd_func[] = {
 		.cmd = HNAE3_DBG_CMD_VLAN_CONFIG,
 		.dbg_dump = hclge_dbg_dump_vlan_config,
 	},
+	{
+		.cmd = HNAE3_DBG_CMD_FD_COUNTER,
+		.dbg_dump = hclge_dbg_dump_fd_counter,
+	},
 };
 
 int hclge_dbg_read_cmd(struct hnae3_handle *handle, enum hnae3_dbg_cmd cmd,