net: hns3: add reset statistics info for PF

This patch adds statistics for PF's reset information,
also, provides a debugfs command to dump these statistics.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -247,6 +247,7 @@ static void hns3_dbg_help(struct hnae3_handle *h)
 	dev_info(&h->pdev->dev, "dump qos pri map\n");
 	dev_info(&h->pdev->dev, "dump qos buf cfg\n");
 	dev_info(&h->pdev->dev, "dump mng tbl\n");
+	dev_info(&h->pdev->dev, "dump reset info\n");
 
 	memset(printf_buf, 0, HNS3_DBG_BUF_LEN);
 	strncat(printf_buf, "dump reg [[bios common] [ssu <prt_id>]",

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

@@ -901,6 +901,26 @@ static void hclge_dbg_fd_tcam(struct hclge_dev *hdev)
 	}
 }
 
+static void hclge_dbg_dump_rst_info(struct hclge_dev *hdev)
+{
+	dev_info(&hdev->pdev->dev, "PF reset count: %d\n",
+		 hdev->rst_stats.pf_rst_cnt);
+	dev_info(&hdev->pdev->dev, "FLR reset count: %d\n",
+		 hdev->rst_stats.flr_rst_cnt);
+	dev_info(&hdev->pdev->dev, "CORE reset count: %d\n",
+		 hdev->rst_stats.core_rst_cnt);
+	dev_info(&hdev->pdev->dev, "GLOBAL reset count: %d\n",
+		 hdev->rst_stats.global_rst_cnt);
+	dev_info(&hdev->pdev->dev, "IMP reset count: %d\n",
+		 hdev->rst_stats.imp_rst_cnt);
+	dev_info(&hdev->pdev->dev, "reset done count: %d\n",
+		 hdev->rst_stats.reset_done_cnt);
+	dev_info(&hdev->pdev->dev, "HW reset done count: %d\n",
+		 hdev->rst_stats.hw_reset_done_cnt);
+	dev_info(&hdev->pdev->dev, "reset count: %d\n",
+		 hdev->rst_stats.reset_cnt);
+}
+
 int hclge_dbg_run_cmd(struct hnae3_handle *handle, char *cmd_buf)
 {
 	struct hclge_vport *vport = hclge_get_vport(handle);
@@ -924,6 +944,8 @@ int hclge_dbg_run_cmd(struct hnae3_handle *handle, char *cmd_buf)
 		hclge_dbg_dump_mng_table(hdev);
 	} else if (strncmp(cmd_buf, "dump reg", 8) == 0) {
 		hclge_dbg_dump_reg_cmd(hdev, cmd_buf);
+	} else if (strncmp(cmd_buf, "dump reset info", 15) == 0) {
+		hclge_dbg_dump_rst_info(hdev);
 	} else {
 		dev_info(&hdev->pdev->dev, "unknown command\n");
 		return -EINVAL;

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

@@ -2360,6 +2360,7 @@ static u32 hclge_check_event_cause(struct hclge_dev *hdev, u32 *clearval)
 		set_bit(HNAE3_IMP_RESET, &hdev->reset_pending);
 		set_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state);
 		*clearval = BIT(HCLGE_VECTOR0_IMPRESET_INT_B);
+		hdev->rst_stats.imp_rst_cnt++;
 		return HCLGE_VECTOR0_EVENT_RST;
 	}
 
@@ -2368,6 +2369,7 @@ static u32 hclge_check_event_cause(struct hclge_dev *hdev, u32 *clearval)
 		set_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state);
 		set_bit(HNAE3_GLOBAL_RESET, &hdev->reset_pending);
 		*clearval = BIT(HCLGE_VECTOR0_GLOBALRESET_INT_B);
+		hdev->rst_stats.global_rst_cnt++;
 		return HCLGE_VECTOR0_EVENT_RST;
 	}
 
@@ -2376,6 +2378,7 @@ static u32 hclge_check_event_cause(struct hclge_dev *hdev, u32 *clearval)
 		set_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state);
 		set_bit(HNAE3_CORE_RESET, &hdev->reset_pending);
 		*clearval = BIT(HCLGE_VECTOR0_CORERESET_INT_B);
+		hdev->rst_stats.core_rst_cnt++;
 		return HCLGE_VECTOR0_EVENT_RST;
 	}
 
@@ -2873,6 +2876,7 @@ static int hclge_reset_prepare_wait(struct hclge_dev *hdev)
 		 * after hclge_cmd_init is called.
 		 */
 		set_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state);
+		hdev->rst_stats.pf_rst_cnt++;
 		break;
 	case HNAE3_FLR_RESET:
 		/* There is no mechanism for PF to know if VF has stopped IO
@@ -2881,6 +2885,7 @@ static int hclge_reset_prepare_wait(struct hclge_dev *hdev)
 		msleep(100);
 		set_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state);
 		set_bit(HNAE3_FLR_DOWN, &hdev->flr_state);
+		hdev->rst_stats.flr_rst_cnt++;
 		break;
 	case HNAE3_IMP_RESET:
 		reg_val = hclge_read_dev(&hdev->hw, HCLGE_PF_OTHER_INT_REG);
@@ -2961,7 +2966,7 @@ static void hclge_reset(struct hclge_dev *hdev)
 	 * know if device is undergoing reset
 	 */
 	ae_dev->reset_type = hdev->reset_type;
-	hdev->reset_count++;
+	hdev->rst_stats.reset_cnt++;
 	/* perform reset of the stack & ae device for a client */
 	ret = hclge_notify_roce_client(hdev, HNAE3_DOWN_CLIENT);
 	if (ret)
@@ -2987,6 +2992,8 @@ static void hclge_reset(struct hclge_dev *hdev)
 		goto err_reset;
 	}
 
+	hdev->rst_stats.hw_reset_done_cnt++;
+
 	ret = hclge_notify_roce_client(hdev, HNAE3_UNINIT_CLIENT);
 	if (ret)
 		goto err_reset;
@@ -3030,6 +3037,7 @@ static void hclge_reset(struct hclge_dev *hdev)
 
 	hdev->last_reset_time = jiffies;
 	hdev->reset_fail_cnt = 0;
+	hdev->rst_stats.reset_done_cnt++;
 	ae_dev->reset_type = HNAE3_NONE_RESET;
 	del_timer(&hdev->reset_timer);
 
@@ -5224,7 +5232,7 @@ static unsigned long hclge_ae_dev_reset_cnt(struct hnae3_handle *handle)
 	struct hclge_vport *vport = hclge_get_vport(handle);
 	struct hclge_dev *hdev = vport->back;
 
-	return hdev->reset_count;
+	return hdev->rst_stats.hw_reset_done_cnt;
 }
 
 static void hclge_enable_fd(struct hnae3_handle *handle, bool enable)

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

@@ -649,6 +649,17 @@ struct hclge_vport_vlan_cfg {
 	u16 vlan_id;
 };
 
+struct hclge_rst_stats {
+	u32 reset_done_cnt;	/* the number of reset has completed */
+	u32 hw_reset_done_cnt;	/* the number of HW reset has completed */
+	u32 pf_rst_cnt;		/* the number of PF reset */
+	u32 flr_rst_cnt;	/* the number of FLR */
+	u32 core_rst_cnt;	/* the number of CORE reset */
+	u32 global_rst_cnt;	/* the number of GLOBAL */
+	u32 imp_rst_cnt;	/* the number of IMP reset */
+	u32 reset_cnt;		/* the number of reset */
+};
+
 /* For each bit of TCAM entry, it uses a pair of 'x' and
  * 'y' to indicate which value to match, like below:
  * ----------------------------------
@@ -691,7 +702,7 @@ struct hclge_dev {
 	unsigned long default_reset_request;
 	unsigned long reset_request;	/* reset has been requested */
 	unsigned long reset_pending;	/* client rst is pending to be served */
-	unsigned long reset_count;	/* the number of reset has been done */
+	struct hclge_rst_stats rst_stats;
 	u32 reset_fail_cnt;
 	u32 fw_version;
 	u16 num_vmdq_vport;		/* Num vmdq vport this PF has set up */