Re: [dpdk-dev] [PATCH v3 3/4] net/mlx5: use port sibling iterators

[Slava Ovsiienko <viacheslavo@mellanox.com>]

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Thomas Monjalon
> Sent: Monday, April 1, 2019 5:27
> To: gaetan.rivet@6wind.com; Shahaf Shuler <shahafs@mellanox.com>;
> Yongseok Koh <yskoh@mellanox.com>
> Cc: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH v3 3/4] net/mlx5: use port sibling iterators
> 
> Iterating over siblings was done with RTE_ETH_FOREACH_DEV() which skips
> the owned ports.
> The new iterators RTE_ETH_FOREACH_DEV_SIBLING() and
> RTE_ETH_FOREACH_DEV_OF() are more appropriate and more correct.
> 
> Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Tested-by: Viacheslav Ovsiienko <mellanox.com>

> ---
>  drivers/net/mlx5/mlx5.c        | 34 +++++++++++++---------------------
>  drivers/net/mlx5/mlx5_ethdev.c |  6 +-----
>  2 files changed, 14 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index
> 1d7ca615b..3287a3d78 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -493,17 +493,15 @@ mlx5_dev_close(struct rte_eth_dev *dev)
>  			dev->data->port_id);
>  	if (priv->domain_id != RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID)
> {
>  		unsigned int c = 0;
> -		unsigned int i = mlx5_dev_to_port_id(dev->device, NULL, 0);
> -		uint16_t port_id[i];
> +		uint16_t port_id;
> 
> -		i = RTE_MIN(mlx5_dev_to_port_id(dev->device, port_id, i), i);
> -		while (i--) {
> +		RTE_ETH_FOREACH_DEV_OF(port_id, dev->device) {
>  			struct mlx5_priv *opriv =
> -				rte_eth_devices[port_id[i]].data-
> >dev_private;
> +				rte_eth_devices[port_id].data->dev_private;
> 
>  			if (!opriv ||
>  			    opriv->domain_id != priv->domain_id ||
> -			    &rte_eth_devices[port_id[i]] == dev)
> +			    &rte_eth_devices[port_id] == dev)
>  				continue;
>  			++c;
>  		}
> @@ -1147,22 +1145,16 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
>  	 * Look for sibling devices in order to reuse their switch domain
>  	 * if any, otherwise allocate one.
>  	 */
> -	i = mlx5_dev_to_port_id(dpdk_dev, NULL, 0);
> -	if (i > 0) {
> -		uint16_t port_id[i];
> +	RTE_ETH_FOREACH_DEV_OF(port_id, dpdk_dev) {
> +		const struct mlx5_priv *opriv =
> +			rte_eth_devices[port_id].data->dev_private;
> 
> -		i = RTE_MIN(mlx5_dev_to_port_id(dpdk_dev, port_id, i), i);
> -		while (i--) {
> -			const struct mlx5_priv *opriv =
> -				rte_eth_devices[port_id[i]].data-
> >dev_private;
> -
> -			if (!opriv ||
> -			    opriv->domain_id ==
> -			    RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID)
> -				continue;
> -			priv->domain_id = opriv->domain_id;
> -			break;
> -		}
> +		if (!opriv ||
> +			opriv->domain_id ==
> +			RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID)
> +			continue;
> +		priv->domain_id = opriv->domain_id;
> +		break;
>  	}
>  	if (priv->domain_id ==
> RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID) {
>  		err = rte_eth_switch_domain_alloc(&priv->domain_id);
> diff --git a/drivers/net/mlx5/mlx5_ethdev.c
> b/drivers/net/mlx5/mlx5_ethdev.c index 7273bd940..e01b698fc 100644
> --- a/drivers/net/mlx5/mlx5_ethdev.c
> +++ b/drivers/net/mlx5/mlx5_ethdev.c
> @@ -1398,11 +1398,7 @@ mlx5_dev_to_port_id(const struct rte_device
> *dev, uint16_t *port_list,
>  	uint16_t id;
>  	unsigned int n = 0;
> 
> -	RTE_ETH_FOREACH_DEV(id) {
> -		struct rte_eth_dev *ldev = &rte_eth_devices[id];
> -
> -		if (ldev->device != dev)
> -			continue;
> +	RTE_ETH_FOREACH_DEV_OF(id, dev) {
>  		if (n < port_list_n)
>  			port_list[n] = id;
>  		n++;
> --
> 2.21.0