[dpdk-dev] [PATCH v4] net/i40e: fix link status

[Jeff Guo]

Acked-by: Jeff Guo <jia.guo at intel.com>

On 9/2/2020 4:06 PM, Guinan Sun wrote:
> If the PF driver supports the new speed reporting capabilities
> then use link_event_adv instead of link_event to get the speed.
>
> Fixes: 2a73125b7041 ("i40evf: fix link info update")
> Cc: stable at dpdk.org
>
> Signed-off-by: Guinan Sun <guinanx.sun at intel.com>
> Tested-by: Shougang Wang <shougangx.wang at intel.com>
> ---
> v4:
> * fix compilation issue in meson build
> v3:
> * request the capability for i40evf
> v2:
> * modify commit log
> * add code comments
> * delete useless code
> ---
>   drivers/net/i40e/base/virtchnl.h  | 16 ++++++++++-
>   drivers/net/i40e/i40e_ethdev_vf.c | 45 ++++++++++++++++++++++++++++---
>   2 files changed, 57 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/i40e/base/virtchnl.h b/drivers/net/i40e/base/virtchnl.h
> index 4f498ca45..9c64fd469 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)
> @@ -536,10 +537,23 @@ enum virtchnl_event_codes {
>   struct virtchnl_pf_event {
>   	enum virtchnl_event_codes event;
>   	union {
> +		/* If the PF driver does not support the new speed reporting
> +		 * capabilities then use link_event else use link_event_adv to
> +		 * get the speed and link information. The ability to understand
> +		 * new speeds is indicated by setting the capability flag
> +		 * VIRTCHNL_VF_CAP_ADV_LINK_SPEED in vf_cap_flags parameter
> +		 * in virtchnl_vf_resource struct and can be used to determine
> +		 * which link event struct to use below.
> +		 */
>   		struct {
>   			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..664de5e5e 100644
> --- a/drivers/net/i40e/i40e_ethdev_vf.c
> +++ b/drivers/net/i40e/i40e_ethdev_vf.c
> @@ -469,7 +469,8 @@ i40evf_get_vf_resource(struct rte_eth_dev *dev)
>   		       VIRTCHNL_VF_OFFLOAD_RSS_AQ |
>   		       VIRTCHNL_VF_OFFLOAD_RSS_REG |
>   		       VIRTCHNL_VF_OFFLOAD_VLAN |
> -		       VIRTCHNL_VF_OFFLOAD_RX_POLLING;
> +		       VIRTCHNL_VF_OFFLOAD_RX_POLLING |
> +		       VIRTCHNL_VF_CAP_ADV_LINK_SPEED;
>   		args.in_args = (uint8_t *)∩︀
>   		args.in_args_size = sizeof(caps);
>   	} else {
> @@ -1386,8 +1387,46 @@ 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 = VIRTCHNL_LINK_SPEED_100MB;
> +				break;
> +			case ETH_SPEED_NUM_1G:
> +				vf->link_speed = VIRTCHNL_LINK_SPEED_1GB;
> +				break;
> +			case ETH_SPEED_NUM_2_5G:
> +				vf->link_speed = VIRTCHNL_LINK_SPEED_2_5GB;
> +				break;
> +			case ETH_SPEED_NUM_5G:
> +				vf->link_speed = VIRTCHNL_LINK_SPEED_5GB;
> +				break;
> +			case ETH_SPEED_NUM_10G:
> +				vf->link_speed = VIRTCHNL_LINK_SPEED_10GB;
> +				break;
> +			case ETH_SPEED_NUM_20G:
> +				vf->link_speed = VIRTCHNL_LINK_SPEED_20GB;
> +				break;
> +			case ETH_SPEED_NUM_25G:
> +				vf->link_speed = VIRTCHNL_LINK_SPEED_25GB;
> +				break;
> +			case ETH_SPEED_NUM_40G:
> +				vf->link_speed = VIRTCHNL_LINK_SPEED_40GB;
> +				break;
> +			default:
> +				vf->link_speed = VIRTCHNL_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");