[dpdk-dev] [PATCH 2/9] net/hns3: get link state change through mailbox

["Wei Hu (Xavier)" <xavier.huwei@foxmail.com>]

From: Hongbo Zheng <zhenghongbo3@huawei.com>

When link down occurs, firmware adds the function of sending message
to PF driver through mailbox, hns3 PMD driver can recognize link state
change faster through the message.

Signed-off-by: Hongbo Zheng <zhenghongbo3@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c |  8 ++++++--
 drivers/net/hns3/hns3_ethdev.h |  1 +
 drivers/net/hns3/hns3_mbx.c    | 37 ++++++++++++++++++++++++++++++++++
 drivers/net/hns3/hns3_mbx.h    |  8 ++++++++
 4 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index bf0ab458f..3c591be51 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -218,6 +218,8 @@ hns3_interrupt_handler(void *param)
 		hns3_schedule_reset(hns);
 	} else if (event_cause == HNS3_VECTOR0_EVENT_RST)
 		hns3_schedule_reset(hns);
+	else if (event_cause == HNS3_VECTOR0_EVENT_MBX)
+		hns3_dev_handle_mbx_msg(hw);
 	else
 		hns3_err(hw, "Received unknown event");
 
@@ -3806,14 +3808,16 @@ hns3_get_mac_link_status(struct hns3_hw *hw)
 	return !!link_status;
 }
 
-static void
+void
 hns3_update_link_status(struct hns3_hw *hw)
 {
 	int state;
 
 	state = hns3_get_mac_link_status(hw);
-	if (state != hw->mac.link_status)
+	if (state != hw->mac.link_status) {
 		hw->mac.link_status = state;
+		hns3_warn(hw, "Link status change to %s!", state ? "up" : "down");
+	}
 }
 
 static void
diff --git a/drivers/net/hns3/hns3_ethdev.h b/drivers/net/hns3/hns3_ethdev.h
index e9a3fe410..004cd75a9 100644
--- a/drivers/net/hns3/hns3_ethdev.h
+++ b/drivers/net/hns3/hns3_ethdev.h
@@ -631,6 +631,7 @@ int hns3_dev_filter_ctrl(struct rte_eth_dev *dev,
 			 enum rte_filter_op filter_op, void *arg);
 bool hns3_is_reset_pending(struct hns3_adapter *hns);
 bool hns3vf_is_reset_pending(struct hns3_adapter *hns);
+void hns3_update_link_status(struct hns3_hw *hw);
 
 static inline bool
 is_reset_pending(struct hns3_adapter *hns)
diff --git a/drivers/net/hns3/hns3_mbx.c b/drivers/net/hns3/hns3_mbx.c
index c1647af4b..26807bc4b 100644
--- a/drivers/net/hns3/hns3_mbx.c
+++ b/drivers/net/hns3/hns3_mbx.c
@@ -282,6 +282,40 @@ hns3_update_resp_position(struct hns3_hw *hw, uint32_t resp_msg)
 	resp->tail = tail;
 }
 
+static void
+hns3_link_fail_parse(struct hns3_hw *hw, uint8_t link_fail_code)
+{
+	switch (link_fail_code) {
+	case HNS3_MBX_LF_NORMAL:
+		break;
+	case HNS3_MBX_LF_REF_CLOCK_LOST:
+		hns3_warn(hw, "Reference clock lost!");
+		break;
+	case HNS3_MBX_LF_XSFP_TX_DISABLE:
+		hns3_warn(hw, "SFP tx is disabled!");
+		break;
+	case HNS3_MBX_LF_XSFP_ABSENT:
+		hns3_warn(hw, "SFP is absent!");
+		break;
+	default:
+		hns3_warn(hw, "Unknown fail code:%u!", link_fail_code);
+		break;
+	}
+}
+
+static void
+hns3_handle_link_change_event(struct hns3_hw *hw,
+			      struct hns3_mbx_pf_to_vf_cmd *req)
+{
+#define LINK_STATUS_OFFSET     1
+#define LINK_FAIL_CODE_OFFSET  2
+
+	if (!req->msg[LINK_STATUS_OFFSET])
+		hns3_link_fail_parse(hw, req->msg[LINK_FAIL_CODE_OFFSET]);
+
+	hns3_update_link_status(hw);
+}
+
 void
 hns3_dev_handle_mbx_msg(struct hns3_hw *hw)
 {
@@ -335,6 +369,9 @@ hns3_dev_handle_mbx_msg(struct hns3_hw *hw)
 
 			hns3_mbx_handler(hw);
 			break;
+		case HNS3_MBX_PUSH_LINK_STATUS:
+			hns3_handle_link_change_event(hw, req);
+			break;
 		default:
 			hns3_err(hw,
 				 "VF received unsupported(%d) mbx msg from PF",
diff --git a/drivers/net/hns3/hns3_mbx.h b/drivers/net/hns3/hns3_mbx.h
index d1a6bfead..3722c8760 100644
--- a/drivers/net/hns3/hns3_mbx.h
+++ b/drivers/net/hns3/hns3_mbx.h
@@ -41,6 +41,7 @@ enum HNS3_MBX_OPCODE {
 	HNS3_MBX_GET_QID_IN_PF,         /* (VF -> PF) get queue id in pf */
 
 	HNS3_MBX_HANDLE_VF_TBL = 38,    /* (VF -> PF) store/clear hw cfg tbl */
+	HNS3_MBX_PUSH_LINK_STATUS = 201, /* (IMP -> PF) get port link status */
 };
 
 /* below are per-VF mac-vlan subcodes */
@@ -64,6 +65,13 @@ enum hns3_mbx_tbl_cfg_subcode {
 	HNS3_MBX_VPORT_LIST_CLEAR = 0,
 };
 
+enum hns3_mbx_link_fail_subcode {
+	HNS3_MBX_LF_NORMAL = 0,
+	HNS3_MBX_LF_REF_CLOCK_LOST,
+	HNS3_MBX_LF_XSFP_TX_DISABLE,
+	HNS3_MBX_LF_XSFP_ABSENT,
+};
+
 #define HNS3_MBX_MAX_MSG_SIZE	16
 #define HNS3_MBX_MAX_RESP_DATA_SIZE	8
 #define HNS3_MBX_RING_MAP_BASIC_MSG_NUM	3
-- 
2.23.0