net: hns3: add vf fault detect support

Currently hns3 driver supports vf fault detect feature. Several ras caused
by VF resources don't need to do PF function reset for recovery. The driver
only needs to reset the specified VF.

So this patch adds process in ras module. New process will get detailed
information about ras and do the most correct measures based on these
accurate information.

Signed-off-by: Jie Wang <wangjie125@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Link: https://lore.kernel.org/r/20231007031215.1067758-3-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 111 insertions, 5 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
index 3f35227ef1fa..d63e114f93d0 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_err.c
@@ -1301,10 +1301,12 @@ static const struct hclge_hw_type_id hclge_hw_type_id_st[] = {
 		.msg = "tqp_int_ecc_error"
 	}, {
 		.type_id = PF_ABNORMAL_INT_ERROR,
-		.msg = "pf_abnormal_int_error"
+		.msg = "pf_abnormal_int_error",
+		.cause_by_vf = true
 	}, {
 		.type_id = MPF_ABNORMAL_INT_ERROR,
-		.msg = "mpf_abnormal_int_error"
+		.msg = "mpf_abnormal_int_error",
+		.cause_by_vf = true
 	}, {
 		.type_id = COMMON_ERROR,
 		.msg = "common_error"
@@ -2759,7 +2761,7 @@ void hclge_handle_occurred_error(struct hclge_dev *hdev)
 		hclge_handle_error_info_log(ae_dev);
 }
 
-static void
+static bool
 hclge_handle_error_type_reg_log(struct device *dev,
 				struct hclge_mod_err_info *mod_info,
 				struct hclge_type_reg_err_info *type_reg_info)
@@ -2770,6 +2772,7 @@ hclge_handle_error_type_reg_log(struct device *dev,
 	u8 mod_id, total_module, type_id, total_type, i, is_ras;
 	u8 index_module = MODULE_NONE;
 	u8 index_type = NONE_ERROR;
+	bool cause_by_vf = false;
 
 	mod_id = mod_info->mod_id;
 	type_id = type_reg_info->type_id & HCLGE_ERR_TYPE_MASK;
@@ -2788,6 +2791,7 @@ hclge_handle_error_type_reg_log(struct device *dev,
 	for (i = 0; i < total_type; i++) {
 		if (type_id == hclge_hw_type_id_st[i].type_id) {
 			index_type = i;
+			cause_by_vf = hclge_hw_type_id_st[i].cause_by_vf;
 			break;
 		}
 	}
@@ -2805,6 +2809,8 @@ hclge_handle_error_type_reg_log(struct device *dev,
 	dev_err(dev, "reg_value:\n");
 	for (i = 0; i < type_reg_info->reg_num; i++)
 		dev_err(dev, "0x%08x\n", type_reg_info->hclge_reg[i]);
+
+	return cause_by_vf;
 }
 
 static void hclge_handle_error_module_log(struct hnae3_ae_dev *ae_dev,
@@ -2815,6 +2821,7 @@ static void hclge_handle_error_module_log(struct hnae3_ae_dev *ae_dev,
 	struct device *dev = &hdev->pdev->dev;
 	struct hclge_mod_err_info *mod_info;
 	struct hclge_sum_err_info *sum_info;
+	bool cause_by_vf = false;
 	u8 mod_num, err_num, i;
 	u32 offset = 0;
 
@@ -2843,12 +2850,16 @@ static void hclge_handle_error_module_log(struct hnae3_ae_dev *ae_dev,
 
 			type_reg_info = (struct hclge_type_reg_err_info *)
 					    &buf[offset++];
-			hclge_handle_error_type_reg_log(dev, mod_info,
-							type_reg_info);
+			if (hclge_handle_error_type_reg_log(dev, mod_info,
+							    type_reg_info))
+				cause_by_vf = true;
 
 			offset += type_reg_info->reg_num;
 		}
 	}
+
+	if (hnae3_ae_dev_vf_fault_supported(hdev->ae_dev) && cause_by_vf)
+		set_bit(HNAE3_VF_EXP_RESET, &ae_dev->hw_err_reset_req);
 }
 
 static int hclge_query_all_err_bd_num(struct hclge_dev *hdev, u32 *bd_num)
@@ -2940,3 +2951,98 @@ err_desc:
 out:
 	return ret;
 }
+
+static bool hclge_reset_vf_in_bitmap(struct hclge_dev *hdev,
+				     unsigned long *bitmap)
+{
+	struct hclge_vport *vport;
+	bool exist_set = false;
+	int func_id;
+	int ret;
+
+	func_id = find_first_bit(bitmap, HCLGE_VPORT_NUM);
+	if (func_id == PF_VPORT_ID)
+		return false;
+
+	while (func_id != HCLGE_VPORT_NUM) {
+		vport = hclge_get_vf_vport(hdev,
+					   func_id - HCLGE_VF_VPORT_START_NUM);
+		if (!vport) {
+			dev_err(&hdev->pdev->dev, "invalid func id(%d)\n",
+				func_id);
+			return false;
+		}
+
+		dev_info(&hdev->pdev->dev, "do function %d recovery.", func_id);
+
+		ret = hclge_reset_tqp(&vport->nic);
+		if (ret) {
+			dev_err(&hdev->pdev->dev,
+				"failed to reset tqp, ret = %d.", ret);
+			return false;
+		}
+
+		ret = hclge_inform_vf_reset(vport, HNAE3_VF_FUNC_RESET);
+		if (ret) {
+			dev_err(&hdev->pdev->dev,
+				"failed to reset func %d, ret = %d.",
+				func_id, ret);
+			return false;
+		}
+
+		exist_set = true;
+		clear_bit(func_id, bitmap);
+		func_id = find_first_bit(bitmap, HCLGE_VPORT_NUM);
+	}
+
+	return exist_set;
+}
+
+static void hclge_get_vf_fault_bitmap(struct hclge_desc *desc,
+				      unsigned long *bitmap)
+{
+#define HCLGE_FIR_FAULT_BYTES	24
+#define HCLGE_SEC_FAULT_BYTES	8
+
+	u8 *buff;
+
+	BUILD_BUG_ON(HCLGE_FIR_FAULT_BYTES + HCLGE_SEC_FAULT_BYTES !=
+		     BITS_TO_BYTES(HCLGE_VPORT_NUM));
+
+	memcpy(bitmap, desc[0].data, HCLGE_FIR_FAULT_BYTES);
+	buff = (u8 *)bitmap + HCLGE_FIR_FAULT_BYTES;
+	memcpy(buff, desc[1].data, HCLGE_SEC_FAULT_BYTES);
+}
+
+int hclge_handle_vf_queue_err_ras(struct hclge_dev *hdev)
+{
+	unsigned long vf_fault_bitmap[BITS_TO_LONGS(HCLGE_VPORT_NUM)];
+	struct hclge_desc desc[2];
+	bool cause_by_vf = false;
+	int ret;
+
+	if (!test_and_clear_bit(HNAE3_VF_EXP_RESET,
+				&hdev->ae_dev->hw_err_reset_req) ||
+	    !hnae3_ae_dev_vf_fault_supported(hdev->ae_dev))
+		return 0;
+
+	hclge_comm_cmd_setup_basic_desc(&desc[0], HCLGE_OPC_GET_QUEUE_ERR_VF,
+					true);
+	desc[0].flag |= cpu_to_le16(HCLGE_COMM_CMD_FLAG_NEXT);
+	hclge_comm_cmd_setup_basic_desc(&desc[1], HCLGE_OPC_GET_QUEUE_ERR_VF,
+					true);
+
+	ret = hclge_comm_cmd_send(&hdev->hw.hw, desc, 2);
+	if (ret) {
+		dev_err(&hdev->pdev->dev,
+			"failed to get vf bitmap, ret = %d.\n", ret);
+		return ret;
+	}
+	hclge_get_vf_fault_bitmap(desc, vf_fault_bitmap);
+
+	cause_by_vf = hclge_reset_vf_in_bitmap(hdev, vf_fault_bitmap);
+	if (cause_by_vf)
+		hdev->ae_dev->hw_err_reset_req = 0;
+
+	return 0;
+}