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>

drivers/net/ethernet/hisilicon/hns3/hnae3.h

@@ -290,6 +290,7 @@ enum hnae3_dbg_cmd {
 	HNAE3_DBG_CMD_RX_QUEUE_INFO,
 	HNAE3_DBG_CMD_TX_QUEUE_INFO,
 	HNAE3_DBG_CMD_FD_TCAM,
+	HNAE3_DBG_CMD_FD_COUNTER,
 	HNAE3_DBG_CMD_MAC_TNL_STATUS,
 	HNAE3_DBG_CMD_SERV_INFO,
 	HNAE3_DBG_CMD_UNKNOWN,

drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c

@@ -323,6 +323,13 @@ static struct hns3_dbg_cmd_info hns3_dbg_cmd[] = {
 		.buf_len = HNS3_DBG_READ_LEN,
 		.init = hns3_dbg_common_file_init,
 	},
+	{
+		.name = "fd_counter",
+		.cmd = HNAE3_DBG_CMD_FD_COUNTER,
+		.dentry = HNS3_DBG_DENTRY_FD,
+		.buf_len = HNS3_DBG_READ_LEN,
+		.init = hns3_dbg_common_file_init,
+	},
 };
 
 static struct hns3_dbg_cap_info hns3_dbg_cap[] = {

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.h

@@ -248,6 +248,7 @@ enum hclge_opcode_type {
 	HCLGE_OPC_FD_KEY_CONFIG		= 0x1202,
 	HCLGE_OPC_FD_TCAM_OP		= 0x1203,
 	HCLGE_OPC_FD_AD_OP		= 0x1204,
+	HCLGE_OPC_FD_CNT_OP		= 0x1205,
 	HCLGE_OPC_FD_USER_DEF_OP	= 0x1207,
 
 	/* MDIO command */
@@ -1109,6 +1110,14 @@ struct hclge_fd_ad_config_cmd {
 	u8 rsv2[8];
 };
 
+struct hclge_fd_ad_cnt_read_cmd {
+	u8 rsv0[4];
+	__le16 index;
+	u8 rsv1[2];
+	__le64 cnt;
+	u8 rsv2[8];
+};
+
 #define HCLGE_FD_USER_DEF_OFT_S		0
 #define HCLGE_FD_USER_DEF_OFT_M		GENMASK(14, 0)
 #define HCLGE_FD_USER_DEF_EN_B		15

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c

@@ -1549,6 +1549,39 @@ static int hclge_dbg_dump_fd_tcam(struct hclge_dev *hdev, char *buf, int len)
 	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,

drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c

@@ -6000,8 +6000,14 @@ static int hclge_config_action(struct hclge_dev *hdev, u8 stage,
 		ad_data.queue_id = rule->queue_id;
 	}
 
-	ad_data.use_counter = false;
-	ad_data.counter_id = 0;
+	if (hdev->fd_cfg.cnt_num[HCLGE_FD_STAGE_1]) {
+		ad_data.use_counter = true;
+		ad_data.counter_id = rule->vf_id %
+				     hdev->fd_cfg.cnt_num[HCLGE_FD_STAGE_1];
+	} else {
+		ad_data.use_counter = false;
+		ad_data.counter_id = 0;
+	}
 
 	ad_data.use_next_stage = false;
 	ad_data.next_input_key = 0;