[dpdk-stable] [PATCH] net/i40e: fix link status

[Guinan Sun]

The PF driver supports to use link_event_adv or link_event to get
the link speed. However, when using link_event_adv to get link speed,
there is a lack of logic to convert between link speed type
(I40E_LINK_SPEED_XXX) and mbps type (SPEED_XXX).
As a result, the mbps type is not recognized, so the link status down
problem occurs. This patch is used for type replacement between speed
types.

Fixes: 2a73125b7041 ("i40evf: fix link info update")
Cc: stable at dpdk.org

Signed-off-by: Guinan Sun <guinanx.sun at intel.com>
---
 drivers/net/i40e/base/virtchnl.h  |  8 +++++-
 drivers/net/i40e/i40e_ethdev_vf.c | 42 +++++++++++++++++++++++++++++--
 drivers/net/i40e/i40e_pf.c        |  4 +++
 3 files changed, 51 insertions(+), 3 deletions(-)

diff --git a/drivers/net/i40e/base/virtchnl.h b/drivers/net/i40e/base/virtchnl.h
index 4f498ca45..90c404fb8 100644
--- a/drivers/net/i40e/base/virtchnl.h
+++ b/drivers/net/i40e/base/virtchnl.h
@@ -240,7 +240,8 @@ VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_vsi_resource);
 #define VIRTCHNL_VF_OFFLOAD_ENCAP		0X00100000
 #define VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM		0X00200000
 #define VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM	0X00400000
-
+/* Define below the capability flags that are not offloads */
+#define VIRTCHNL_VF_CAP_ADV_LINK_SPEED		0x00000080
 #define VF_BASE_MODE_OFFLOADS (VIRTCHNL_VF_OFFLOAD_L2 | \
 			       VIRTCHNL_VF_OFFLOAD_VLAN | \
 			       VIRTCHNL_VF_OFFLOAD_RSS_PF)
@@ -540,6 +541,11 @@ struct virtchnl_pf_event {
 			enum virtchnl_link_speed link_speed;
 			bool link_status;
 		} link_event;
+		struct {
+			/* link_speed provided in Mbps */
+			u32 link_speed;
+			u8 link_status;
+		} link_event_adv;
 	} event_data;
 
 	int severity;
diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 69cab8e73..f8cf45fbe 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1386,8 +1386,46 @@ i40evf_handle_pf_event(struct rte_eth_dev *dev, uint8_t *msg,
 		break;
 	case VIRTCHNL_EVENT_LINK_CHANGE:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_LINK_CHANGE event");
-		vf->link_up = pf_msg->event_data.link_event.link_status;
-		vf->link_speed = pf_msg->event_data.link_event.link_speed;
+
+		if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_CAP_ADV_LINK_SPEED) {
+			vf->link_up =
+				pf_msg->event_data.link_event_adv.link_status;
+
+			switch (pf_msg->event_data.link_event_adv.link_speed) {
+			case ETH_SPEED_NUM_100M:
+				vf->link_speed = I40E_LINK_SPEED_100MB;
+				break;
+			case ETH_SPEED_NUM_1G:
+				vf->link_speed = I40E_LINK_SPEED_1GB;
+				break;
+			case ETH_SPEED_NUM_2_5G:
+				vf->link_speed = I40E_LINK_SPEED_2_5GB;
+				break;
+			case ETH_SPEED_NUM_5G:
+				vf->link_speed = I40E_LINK_SPEED_5GB;
+				break;
+			case ETH_SPEED_NUM_10G:
+				vf->link_speed = I40E_LINK_SPEED_10GB;
+				break;
+			case ETH_SPEED_NUM_20G:
+				vf->link_speed = I40E_LINK_SPEED_20GB;
+				break;
+			case ETH_SPEED_NUM_25G:
+				vf->link_speed = I40E_LINK_SPEED_25GB;
+				break;
+			case ETH_SPEED_NUM_40G:
+				vf->link_speed = I40E_LINK_SPEED_40GB;
+				break;
+			default:
+				vf->link_speed = I40E_LINK_SPEED_UNKNOWN;
+				break;
+			}
+		} else {
+			vf->link_up =
+				pf_msg->event_data.link_event.link_status;
+			vf->link_speed =
+				pf_msg->event_data.link_event.link_speed;
+		}
 		break;
 	case VIRTCHNL_EVENT_PF_DRIVER_CLOSE:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_PF_DRIVER_CLOSE event");
diff --git a/drivers/net/i40e/i40e_pf.c b/drivers/net/i40e/i40e_pf.c
index 7bf1e7941..33af30bbb 100644
--- a/drivers/net/i40e/i40e_pf.c
+++ b/drivers/net/i40e/i40e_pf.c
@@ -320,6 +320,10 @@ i40e_pf_host_process_cmd_get_vf_resource(struct i40e_pf_vf *vf, uint8_t *msg,
 	else
 		vf->request_caps = *(uint32_t *)msg;
 
+#ifdef VIRTCHNL_VF_CAP_ADV_LINK_SPEED
+	vf_res->vf_cap_flags |= VIRTCHNL_VF_CAP_ADV_LINK_SPEED;
+#endif /* VIRTCHNL_VF_CAP_ADV_LINK_SPEED */
+
 	/* enable all RSS by default,
 	 * doesn't support hena setting by virtchnnl yet.
 	 */
-- 
2.17.1