Re: [dpdk-dev] [dpdk-stable] [PATCH v3] net/i40e: fix link status

["Sun, GuinanX" <guinanx.sun@intel.com>]

Hi Ferruh

> -----Original Message-----
> From: Ferruh Yigit [mailto:ferruh.yigit@intel.com]
> Sent: Monday, August 31, 2020 9:24 PM
> To: Sun, GuinanX <guinanx.sun@intel.com>; dev@dpdk.org
> Cc: Xing, Beilei <beilei.xing@intel.com>; Guo, Jia <jia.guo@intel.com>;
> stable@dpdk.org
> Subject: Re: [dpdk-stable] [PATCH v3] net/i40e: fix link status
> 
> On 8/6/2020 9:16 AM, 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@dpdk.org
> >
> > Signed-off-by: Guinan Sun <guinanx.sun@intel.com>
> > ---
> > 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..ccf5d8c57 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 *)&caps;
> >  		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 = 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;
> 
> 
> Hi Guinan,
> 
> These assignments are causing build error [1] because of different types.
> 
> 'vf->link_speed' is "enum virtchnl_link_speed", but the values
> ('I40E_LINK_SPEED_100MB' etc..) are "enum i40e_aq_link_speed"
> 
> [1]
> http://mails.dpdk.org/archives/test-report/2020-August/148030.html

I will fix the problem you mentioned in the new patch.