[dpdk-dev] [PATCH v11 1/6] net/virtio: replace default virtio speed

[Morten Brørup]

> From: Ivan Dyukov [mailto:i.dyukov at samsung.com]
> Sent: Thursday, April 16, 2020 7:53 AM
> 
> This patch set speed to unknown
> 
> Signed-off-by: Ivan Dyukov <i.dyukov at samsung.com>
> ---
>  drivers/net/virtio/virtio_ethdev.c |  4 ++--
>  lib/librte_ethdev/rte_ethdev.h     | 27 ++++++++++++++-------------
>  2 files changed, 16 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/net/virtio/virtio_ethdev.c
> b/drivers/net/virtio/virtio_ethdev.c
> index f9d0ea70d..e98a76ea2 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -2371,7 +2371,7 @@ virtio_dev_link_update(struct rte_eth_dev *dev,
> __rte_unused int wait_to_complet
> 
>  	memset(&link, 0, sizeof(link));
>  	link.link_duplex = ETH_LINK_FULL_DUPLEX;
> -	link.link_speed  = ETH_SPEED_NUM_10G;
> +	link.link_speed  = ETH_SPEED_NUM_UNKNOWN;
>  	link.link_autoneg = ETH_LINK_FIXED;
> 
>  	if (!hw->started) {
> @@ -2427,7 +2427,7 @@ virtio_dev_info_get(struct rte_eth_dev *dev,
> struct rte_eth_dev_info *dev_info)
>  	uint64_t tso_mask, host_features;
>  	struct virtio_hw *hw = dev->data->dev_private;
> 
> -	dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
> +	dev_info->speed_capa = ETH_LINK_SPEED_AUTONEG; /* fake value */

If you indicate that the NIC supports Auto Negotiation here,
then I suggest that you also change the link status as follows:
- link.link_autoneg = ETH_LINK_FIXED;
+ link.link_autoneg = ETH_LINK_AUTONEG;

I considered the opposite change, but if we define that the underlying environment determines the actual speed, then Auto Negotiation seems more correct than Fixed speed.

Med venlig hilsen / kind regards
- Morten Brørup