[dpdk-dev] [PATCH 06/17] net/hns3: fix link status change from firmware

[Lijun Ou]

From: Huisong Li <lihuisong at huawei.com>

When the hardware link status changes, the firmware proactively
reports the link status change message, and then driver update
link status. This feature is lack of a switch to control in pf
driver. Otherwise, this feature does not take effect when the
kernel PF driver that supports the feature is not loaded.

Fixes: 109e4dd1bd7a ("net/hns3: get link state change through mailbox")
Cc: stable at dpdk.org

Signed-off-by: Huisong Li <lihuisong at huawei.com>
Signed-off-by: Lijun Ou <oulijun at huawei.com>
---
 drivers/net/hns3/hns3_cmd.h    | 10 ++++++++++
 drivers/net/hns3/hns3_ethdev.c | 31 +++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/drivers/net/hns3/hns3_cmd.h b/drivers/net/hns3/hns3_cmd.h
index 6b1ce22..5ebeff0 100644
--- a/drivers/net/hns3/hns3_cmd.h
+++ b/drivers/net/hns3/hns3_cmd.h
@@ -219,6 +219,9 @@ enum hns3_opcode_type {
 	/* Clear hardware state command */
 	HNS3_OPC_CLEAR_HW_STATE         = 0x700B,
 
+	/* Firmware stats command */
+	HNS3_OPC_FIRMWARE_COMPAT_CFG    = 0x701A,
+
 	/* SFP command */
 	HNS3_OPC_GET_SFP_EEPROM         = 0x7100,
 	HNS3_OPC_GET_SFP_EXIST          = 0x7101,
@@ -648,6 +651,13 @@ enum hns3_promisc_type {
 	HNS3_BROADCAST	= 3,
 };
 
+#define HNS3_LINK_EVENT_REPORT_EN_B	0
+#define HNS3_NCSI_ERROR_REPORT_EN_B	1
+struct hns3_firmware_compat_cmd {
+	uint32_t compat;
+	uint8_t rsv[20];
+};
+
 #define HNS3_MAC_TX_EN_B		6
 #define HNS3_MAC_RX_EN_B		7
 #define HNS3_MAC_PAD_TX_B		11
diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 13f78f2..3706e05 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -3919,6 +3919,26 @@ hns3_buffer_alloc(struct hns3_hw *hw)
 }
 
 static int
+hns3_firmware_compat_config(struct hns3_hw *hw, bool is_init)
+{
+	struct hns3_firmware_compat_cmd *req;
+	struct hns3_cmd_desc desc;
+	uint32_t compat = 0;
+
+	hns3_cmd_setup_basic_desc(&desc, HNS3_OPC_FIRMWARE_COMPAT_CFG, false);
+	req = (struct hns3_firmware_compat_cmd *)desc.data;
+
+	if (is_init) {
+		hns3_set_bit(compat, HNS3_LINK_EVENT_REPORT_EN_B, 1);
+		hns3_set_bit(compat, HNS3_NCSI_ERROR_REPORT_EN_B, 0);
+	}
+
+	req->compat = rte_cpu_to_le_32(compat);
+
+	return hns3_cmd_send(hw, &desc, 1);
+}
+
+static int
 hns3_mac_init(struct hns3_hw *hw)
 {
 	struct hns3_adapter *hns = HNS3_DEV_HW_TO_ADAPTER(hw);
@@ -4610,6 +4630,15 @@ hns3_init_hardware(struct hns3_adapter *hns)
 		goto err_mac_init;
 	}
 
+	/*
+	 * Requiring firmware to enable some features, driver can
+	 * still work without it.
+	 */
+	ret = hns3_firmware_compat_config(hw, true);
+	if (ret)
+		PMD_INIT_LOG(WARNING, "firmware compatible features not "
+			     "supported, ret = %d.", ret);
+
 	return 0;
 
 err_mac_init:
@@ -4753,6 +4782,7 @@ hns3_init_pf(struct rte_eth_dev *eth_dev)
 err_enable_intr:
 	hns3_fdir_filter_uninit(hns);
 err_fdir:
+	(void)hns3_firmware_compat_config(hw, false);
 	hns3_uninit_umv_space(hw);
 err_init_hw:
 	hns3_tqp_stats_uninit(hw);
@@ -4787,6 +4817,7 @@ hns3_uninit_pf(struct rte_eth_dev *eth_dev)
 	(void)hns3_config_gro(hw, false);
 	hns3_promisc_uninit(hw);
 	hns3_fdir_filter_uninit(hns);
+	(void)hns3_firmware_compat_config(hw, false);
 	hns3_uninit_umv_space(hw);
 	hns3_tqp_stats_uninit(hw);
 	hns3_pf_disable_irq0(hw);
-- 
2.7.4