From: Huazhong Tan <tanhuazhong@huawei.com>
Date: Thu, 31 Oct 2019 19:23:16 +0800
Subject: net: hns3: dump some debug information when reset fail
Patch-mainline: v5.5-rc1
Git-commit: 3d77d0cb054cbc8d9171ebc7f6b0c33445b2a94d
References: bsc#1154353

When reset fails, there is some information that will help for
finding out why does reset fail. and removes an unused
core_rst_cnt field in struct hclge_rst_stats.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c |    5 --
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c    |    3 +
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h    |    2 
 drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c  |   29 +++++++++++++
 4 files changed, 35 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
@@ -929,7 +929,7 @@ static void hclge_dbg_fd_tcam(struct hcl
 	}
 }
 
-static void hclge_dbg_dump_rst_info(struct hclge_dev *hdev)
+void hclge_dbg_dump_rst_info(struct hclge_dev *hdev)
 {
 	dev_info(&hdev->pdev->dev, "PF reset count: %u\n",
 		 hdev->rst_stats.pf_rst_cnt);
@@ -945,8 +945,6 @@ static void hclge_dbg_dump_rst_info(stru
 		 hdev->rst_stats.hw_reset_done_cnt);
 	dev_info(&hdev->pdev->dev, "reset count: %u\n",
 		 hdev->rst_stats.reset_cnt);
-	dev_info(&hdev->pdev->dev, "reset count: %u\n",
-		 hdev->rst_stats.reset_cnt);
 	dev_info(&hdev->pdev->dev, "reset fail count: %u\n",
 		 hdev->rst_stats.reset_fail_cnt);
 	dev_info(&hdev->pdev->dev, "vector0 interrupt enable status: 0x%x\n",
@@ -961,6 +959,7 @@ static void hclge_dbg_dump_rst_info(stru
 		 hclge_read_dev(&hdev->hw, HCLGE_NIC_CSQ_DEPTH_REG));
 	dev_info(&hdev->pdev->dev, "function reset status: 0x%x\n",
 		 hclge_read_dev(&hdev->hw, HCLGE_FUN_RST_ING));
+	dev_info(&hdev->pdev->dev, "hdev state: 0x%lx\n", hdev->state);
 }
 
 static void hclge_dbg_get_m7_stats_info(struct hclge_dev *hdev)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -3669,6 +3669,9 @@ static bool hclge_reset_err_handle(struc
 	hclge_reset_handshake(hdev, true);
 
 	dev_err(&hdev->pdev->dev, "Reset fail!\n");
+
+	hclge_dbg_dump_rst_info(hdev);
+
 	return false;
 }
 
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
@@ -656,7 +656,6 @@ struct hclge_rst_stats {
 	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 */
@@ -1005,4 +1004,5 @@ int hclge_query_bd_num_cmd_send(struct h
 void hclge_report_hw_error(struct hclge_dev *hdev,
 			   enum hnae3_hw_error_type type);
 void hclge_inform_vf_promisc_info(struct hclge_vport *vport);
+void hclge_dbg_dump_rst_info(struct hclge_dev *hdev);
 #endif
--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c
@@ -1549,6 +1549,33 @@ static int hclgevf_reset_prepare_wait(st
 	return ret;
 }
 
+static void hclgevf_dump_rst_info(struct hclgevf_dev *hdev)
+{
+	dev_info(&hdev->pdev->dev, "VF function reset count: %u\n",
+		 hdev->rst_stats.vf_func_rst_cnt);
+	dev_info(&hdev->pdev->dev, "FLR reset count: %u\n",
+		 hdev->rst_stats.flr_rst_cnt);
+	dev_info(&hdev->pdev->dev, "VF reset count: %u\n",
+		 hdev->rst_stats.vf_rst_cnt);
+	dev_info(&hdev->pdev->dev, "reset done count: %u\n",
+		 hdev->rst_stats.rst_done_cnt);
+	dev_info(&hdev->pdev->dev, "HW reset done count: %u\n",
+		 hdev->rst_stats.hw_rst_done_cnt);
+	dev_info(&hdev->pdev->dev, "reset count: %u\n",
+		 hdev->rst_stats.rst_cnt);
+	dev_info(&hdev->pdev->dev, "reset fail count: %u\n",
+		 hdev->rst_stats.rst_fail_cnt);
+	dev_info(&hdev->pdev->dev, "vector0 interrupt enable status: 0x%x\n",
+		 hclgevf_read_dev(&hdev->hw, HCLGEVF_MISC_VECTOR_REG_BASE));
+	dev_info(&hdev->pdev->dev, "vector0 interrupt status: 0x%x\n",
+		 hclgevf_read_dev(&hdev->hw, HCLGEVF_VECTOR0_CMDQ_STAT_REG));
+	dev_info(&hdev->pdev->dev, "handshake status: 0x%x\n",
+		 hclgevf_read_dev(&hdev->hw, HCLGEVF_CMDQ_TX_DEPTH_REG));
+	dev_info(&hdev->pdev->dev, "function reset status: 0x%x\n",
+		 hclgevf_read_dev(&hdev->hw, HCLGEVF_RST_ING));
+	dev_info(&hdev->pdev->dev, "hdev state: 0x%lx\n", hdev->state);
+}
+
 static void hclgevf_reset_err_handle(struct hclgevf_dev *hdev)
 {
 	/* recover handshake status with IMP when reset fail */
@@ -1563,6 +1590,8 @@ static void hclgevf_reset_err_handle(str
 	if (hclgevf_is_reset_pending(hdev)) {
 		set_bit(HCLGEVF_RESET_PENDING, &hdev->reset_state);
 		hclgevf_reset_task_schedule(hdev);
+	} else {
+		hclgevf_dump_rst_info(hdev);
 	}
 }